Abstract:
The present invention relates to an intrusion sensing net of a structure that does not allow the sensing net to be disassembled or dissolved easily but does enable easy installation at the site, and to a weaving machine that weaves the same. The invention relates to an intrusion sensing net the entirety whereof is woven with one sensing line, that includes a repeating and consistent weaving pattern; wherein the consistent weaving pattern comprises a support line, a line of a zigzag shape that enables the support line to connect all the vertices of one side starting from one end of the support line and ending at the other end, and another line of a zigzag shape that is formed in symmetry with the zigzag shape based on the another support line, wherein at the point where the line of a zigzag shape meets with the another line of a zigzag shape, two sensing lines corresponding to each line wind and hold one another.

Description:
REFERENCE TO RELATED APPLICATIONS 
       [0001]    This is a continuation of pending International Patent Application PCT/KR2009/007617 filed on Dec. 19, 2009, which designates the United States and claims priority of Korean Patent Application No. 10-2009-0004247 filed on Jan. 19, 2009, the entire contents of which are incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to an intrusion sensor net used for an unmanned outdoor security system. More particularly, the present invention relates to an intrusion sensor net for an unmanned outdoor security system, which does not easily undo and is easy to install on the spot, and a weaving machine for the same. 
       BACKGROUND OF THE INVENTION 
       [0003]    Various facilities, such as military camps, airports, power plants, detention facilities, and so on, may not guarantee the national security or cause huge losses to the public society when enemies invade, outsiders trespass or insiders escape. Accordingly, security facilities to prevent intrusion or escape are essential. For such security facilities, security fences made of wire mesh as shown in  FIG. 1  have been widely installed. However, only the security fences are difficult to monitor and prevent someone&#39;s intrusion through jumping over a wall or cutting the fence. Therefore, an intrusion monitoring system that is mounted on the security fence to monitor such intrusion has been developed and operated. 
         [0004]    Various kinds of sensing methods and devices, such as surveillance cameras, hot-wire sensors, and optical fibers, have been used for the intrusion sensing system, and the optical fiber sensors out of the above are widely utilized. The optical fiber sensors are to sense an attempt of an intrusion at regions where security is needed by mesh-type optical fiber nets attached and installed to the security fence. As shown in  FIG. 2 , the optical fiber net is woven in such a fashion that optical fibers simply cross each other and is installed on poles  120  of the existing fence. After that, an input control part  100  sends a predetermined optical signal to the optical fiber net  130 , and an output control part  110  receives the optical signal passing through the optical fiber net  130 . When an intruder opens or cuts the optical fiber net  130 , the optical signal is changed, and the system senses the change in optical signal, and then, checks whether or not there is any attempt of intrusion and takes proper countermeasures. 
         [0005]    The optical fiber net has an advantage in that it is difficult for the intruder to open or break the net because it is sensitive of the attempt for intrusion, but may cause misjudgment because it is also sensitive of natural phenomena such as wind or rainfall, collision with animals, and so on. Furthermore, the optical fiber net is mounted on the security fence in such a fashion that the edge of the net is tied to the poles of the fence via fastening means. Hence, someone may intrude by cutting the fastening means. In the meantime, without using the fastening means, it is not easy to install the optical fiber net, which is previously manufactured in a factory, to the poles of the security fence by winding the optical fiber net on the poles of the security fence. The reason is that the optical fiber net must be installed at the same time with the installation of the security fence or the existing security fence is reinstalled in order to install the optical fiber net in such a fashion that the optical fiber is wound on the poles of the security fence. Accordingly, such installation work requires excessive manpower, and the optical fiber net cannot be firmly installed to the security fence because the optical fiber is not flexible. 
       SUMMARY OF THE INVENTION 
       [0006]    Accordingly, the present invention has been made in an effort to solve the above-mentioned problems occurring in the prior arts, and it is an object of the present invention to provide an intrusion sensor net for an unmanned outdoor security system, which does not make misjudgment on intrusion and is not easy to be dismantled, and a weaving machine for weaving the intrusion sensor net. 
         [0007]    Another object of the present invention is to provide an intrusion sensor net, which is easy to be installed on the installation spot, and a weaving machine for weaving the intrusion sensor net. 
         [0008]    To achieve the above objects, the present invention provides an intrusion sensor net, which is woven with a single sensing line and has a predetermined repeated weaving pattern, comprising: a first support line; a first zigzag-shaped line that starts from an end portion of the first support line and ends at the other end portion of the first support line and all the vertices of one side thereof are connected by the first support line; a second support line for connecting all the vertices of the other side of the first zigzag-shaped line; and a second zigzag-shaped line that is formed in symmetry with the first zigzag-shaped line relative to the second support line, wherein two sensing lines corresponding to the first zigzag-shaped line and the second zigzag-shaped line are interlaced with each other at an intersection where the first zigzag-shaped line and the second zigzag-shaped line meet each other. 
         [0009]    Moreover, the two sensing lines corresponding to the first zigzag-shaped line and the second zigzag-shaped line are interlaced with the first support line or the second support line at the intersection where the first zigzag-shaped line and the second zigzag-shaped line meet each other in such a fashion that the first support line or the second support line goes under one side of the zigzag-shaped line and over the other side of the zigzag-shaped line, so that the first support line or the second support line gets curved. 
         [0010]    Furthermore, the intrusion sensor net further includes a first spare sensing line formed at a starting part of weaving and a second spare sensing line formed at an ending part of weaving. 
         [0011]    Additionally, a plurality of fixtures are mounted on the edge of the sensor net, and each of the fixtures includes: a through hole and a sensing line fixing hole perforated in each of the fixtures, the through hole and the sensing line fixing hole having different directions of central axes from each other; and a slit formed in the sensing line fixing hole for allowing the sensing line to be inserted thereinto from the outside and seated on the sensing line fixing hole, and wherein at least one of the sensing lines of the first zigzag-shaped line and the second zigzag-shaped line sensing lines goes through the sensing line fixing hole. 
         [0012]    In addition, the single sensing line passes through the through holes of the plural fixtures in order along the edge of the intrusion sensor net. 
         [0013]    Moreover, the through hole is mounted at an inner portion than the sensing line fixing hole toward the center of the intrusion sensor net. 
         [0014]    Furthermore, central axes of the through hole and the sensing line fixing hole are perpendicular to each other. 
         [0015]    Additionally, inside the edge of the intrusion sensor net, a clip is mounted at the intersection where the first zigzag-shaped sensing line and the second zigzag-shaped sensing line meet each other in order to fasten the sensing lines corresponding to the first and second zigzag-shaped lines and the sensing line corresponding to the first support line or the second support line together. 
         [0016]    In addition, the sensing line is a coaxial cable. 
         [0017]    In another aspect of the present invention, the present invention provides a method of weaving an intrusion sensor net with a single sensing line using a plurality of fixtures, each of which includes first and second holes having different central axes from each other and a slit formed in the second hole and extending to the outer end portion of the fixture, the weaving method comprising: a first step of deploying a line of fixtures; a second step of passing a sensing line through the second hole of the first fixture of the deployed fixtures and passing the sensing line through the second holes of the other fixtures in order so that the sensing line passing through the fixtures forms a first zigzag shape and the fixtures are respectively located at the vertices of one side of the first zigzag shape; a third step of further deploying a fixture at a location facing the final fixture of the second step and passing the sensing line through the second hole of the deployed fixture; a fourth step of forming a first central line while passing through the vertices of the other side of the first zigzag shape in order in an alternating fashion that the sensing line goes under one of the two lines, which form each vertex of the first zigzag shape, and goes over the other one of the two lines near each vertex of the first zigzag shape; a fifth step of further deploying a fixture at a location facing the first fixture and passing the sensing line through the second hole of the fixture and the second hole of the first fixture, and then forming a second zigzag-shaped line in such a fashion that the sensing line interlaces all of the line, which forms the vertices of the other side of the first zigzag shape, and the first central line at an intersection between the sensing line and the first central line and is symmetric with the first zigzag-shaped line relative to the first central line; and a sixth step of forming a second central line by passing the sensing line through the vertices of the second zigzag shape, which do not meet the first central line, in order in an alternating fashion that the sensing line goes under one of the two lines, which form each vertex of the second zigzag shape, and goes over the other one of the two lines. 
         [0018]    Moreover, the fixture is deployed in such a way that the first hole faces the inside of the intrusion sensor net, which will be woven. 
         [0019]    Furthermore, the fixtures deployed in one line in the first step are in even number. 
         [0020]    In a further aspect of the present invention, the present invention provides a weaving machine, which includes a rotatable cylindrical body and driving means for rotating the cylindrical body, wherein the cylindrical body includes: a plurality of columns of pins protrudingly formed along the outer circumference of the cylindrical body, and wherein the plurality of the columns of pins comprises a first column in which a plurality of pins are deployed in a line and a second column that is adjacent to the first column at a predetermined interval from the first column and that has a plurality of pins deployed at the locations facing the region in-between the pins of the first column, and wherein the first column and the second column are repeatedly deployed in an alternating fashion. 
         [0021]    Additionally, the intervals between the pins formed on the cylindrical body are all identical and intervals between the columns are all identical. 
         [0022]    In addition, the pins of the second column are deployed at the locations corresponding to central points between the neighboring pins of the first column. 
         [0023]    Moreover, the weaving machine further includes a winding rod that winds the intrusion sensor net, which is woven in the cylindrical body, while rotating in interlock with the cylindrical body. 
         [0024]    Furthermore, the cylindrical shape of the cylindrical body is formed by a plurality of pin support rods mounted along the outer circumference thereof and the pins are protrudingly formed on the pin support rods. 
         [0025]    As described above, the intrusion sensor net according to the present invention has the following effects. 
         [0026]    First, the intrusion sensor net is not easily dismantled because the zigzag-shaped sensing lines and the central line engage with one another. Moreover, anybody cannot intrude without damaging the sensor net because it is not easy to open the gaps of the woven sensor net, and hence, the intrusion sensor net can perfectly sense an attempt for intrusion. 
         [0027]    Second, the intrusion sensor net according to the present invention is easy to be installed on the installation spot because the sensor net includes the spare sensing lines necessary for on-site installation work and the fixtures having the through holes for allowing passing of the spare sensing lines. 
         [0028]    Third, even though the intrusion sensor net is woven with the single sensing line, the intrusion sensor net is firmly installed to the security fence by being bound to the poles of the security fence while the spare sensing line passes through the through holes of the fixtures mounted along the edge of the sensor net. Therefore, the sensor net cannot be separated from the security facility without an abnormal signal and provide an excellent sensing effect once the sensor net is closely attached to the security fence. 
         [0029]    Fourth, the intrusion sensor net senses only a signal related with cutoff of the sensing line because the entire sensor net is woven with the single sensing line and the gaps of the woven net are not opened or widened. Hence, the intrusion sensor net according to the present invention does not make misjudgment due to contact with animals or external shock, such as a gust of wind. 
         [0030]    Furthermore, the weaving machine according to the present invention can keep the entire structure and provide effective work till the intrusion sensor net is completely finished, so that the weaving work of the intrusion sensor net is progressed easily and effectively. 
         [0031]    Moreover, the weaving machine according to the present invention can produce intrusion sensor nets of various sizes and dimensions according to consumers&#39; demands because it can control the sizes and dimensions of the woven sensor net according to heights and lengths of the intrusion sensor net, which will be installed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0032]      FIG. 1  illustrates a security fence according to a prior art. 
           [0033]      FIG. 2  illustrates an intrusion sensor using an optical sensor net according to another prior art. 
           [0034]      FIG. 3  illustrates an intrusion sensor net according to the present invention. 
           [0035]      FIGS. 4 to 7  illustrate a method of weaving the intrusion sensor net according to the present invention. 
           [0036]      FIG. 8  illustrates a fixture mounted on the intrusion sensor net according to the present invention. 
           [0037]      FIG. 9  illustrates a clip mounted on the intrusion sensor net according to the present invention. 
           [0038]      FIG. 10  illustrates a spread state of the intrusion sensor net after being woven in a weaving machine. 
           [0039]      FIG. 11  is a front view of the weaving machine for making the intrusion sensor net. 
           [0040]      FIG. 12  is a plan view of the weaving machine for making the intrusion sensor net. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0041]    Reference will be now made in detail to the preferred embodiment of the present invention with reference to the attached drawings. 
         [0042]      FIG. 3  is a schematic diagram of an intrusion sensor net  10  according to the present invention. 
         [0043]    The intrusion sensor net  10  according to the present invention is attached on a security fence illustrated in  FIG. 1  to sense someone&#39;s intrusion due to cutting or separation of the intrusion sensor net  10  occurring when there is an attempt for intrusion. The intrusion sensor net  10  of the present invention is woven in correspondence with dimensions of an upper part, a lower part or an underground part of a security facility, such as the security fence shown in  FIG. 1 , and then, is attached to the security facility in order. Accordingly, nobody can intrude through the security facility without cutting or destroying the intrusion sensor net or the system according to the present invention. For ease of security, the intrusion sensor net of a predetermined length, for instance, 30 m, is attached to the security facility in a longitudinal direction in order. When the attached intrusion sensor net  10  is cut, a sensor  40  senses a change of a sensing signal, and the signal sensed by the sensor  40  is transmitted to a central control center through communication means. The central control center can take proper steps, such as check of the situation through a monitoring camera installed in each zone, sending a guard, impartment of emergency situations, and so on. 
         [0044]    The intrusion sensor net  10  illustrated in  FIG. 3  is woven with a single sensing line  15  in such a fashion that the intrusion sensor net  10  is not cut off from a starting part  11  to an ending part  12 . The intrusion sensor net is woven with a predetermined consistent weaving pattern. Moreover, as shown in  FIG. 3 , the woven intrusion sensor net is generally formed in a rectangular shape and has a plurality of knot portions  13  formed on the outer edges thereof. 
         [0045]    The predetermined consistent weaving pattern includes: a first support line  16 ; a first zigzag-shaped line  17  that starts from an end portion of the first support line and ends at the other end portion of the first support line and enables the first support line to connect all the vertices of one side thereof; a second support line  18  for connecting all the vertices of the other side of the first zigzag-shaped line; and a second zigzag-shaped line  19  that is formed in symmetry with the first zigzag-shaped line relative to the second support line  18 . 
         [0046]    The starting part  11  and the ending part  12  are spare sensing line remaining after weaving, and are connected to the sensor  40  in such a way as to respectively serve as an input part and an output part of the sensing signal, and the sensing signal of the sensor  40  is connected to the central control center and a communication net. It is preferable that the intrusion sensor net  10  is woven with a coaxial cable  15 . The coaxial cable can compensate the shortcomings of the optical sensor lines, which are too sensitive to shock by wind or animals, and is a combination of a main conductor and a cylindrical conductor surrounding the main conductor. The coaxial cable is less affected by simple shock or external disturbing signals, generates a sensing signal when it is cut off, and does not come undone or broken because it is woven according to the weaving method, which will be described later. 
         [0047]    In the case that the intrusion sensor net is made with the coaxial cable, as described above, the starting part  11  and the ending part  12  are all introduced into the sensor  40 , and hence, the sensing signal is transferable using the main conductor. Moreover, even though only one of the starting part  11  and the ending part  12  is introduced into the sensor  40  and the other electrically fastens the main conductor of an end portion thereof and the cylindrical conductor surrounding the main conductor with each other, the sensing signal can be inputted and outputted to the entire sensor net through the main conductor and the cylindrical conductor. 
         [0048]    The reference numeral  13  designates a part to fasten a joint part  14  to a pole or a wire mesh of the security facility when the intrusion sensor net  10  is attached to the security facility on the spot after the intrusion sensor net  10  is completely woven. Therefore, the intrusion sensor net  10  finished in a manufacturing plant must have a spare length of the sensing line  15  of the starting part  11  or the ending part  12 , so that it can be attached to the security facility on the spot. A plurality of the joint parts  14  are formed along the circumference of the intrusion sensor net, and each joint part  14  has a fixture  20  as illustrated in  FIG. 8 , and hence, it can be easily attached to the security facility by the spare line of the starting part  11  or the ending part  12 . 
         [0049]      FIGS. 4 to 6  concretely show a method of weaving the intrusion sensor net  10  according to the present invention. 
         [0050]    First, as shown in  FIG. 4 , a plurality of pins  22  are mounted in columns in the first line (line  1 ), and a plurality of pins  22  are mounted between the pins of the first line in the second line (line  2 ). A plurality of the pin columns are formed along the circumference of a cylindrical body  50  of the weaving machine, which produces the sensor net according to the present invention, by a repeatedly alternating deployment. The sets of the pins may be mounted on a flat surface as well as the cylindrical form, but it is preferable that the intrusion sensor net is woven while the cylindrical body  50  is rotated in a state that the pins are mounted on the surface of the cylindrical body rather than on the flat surface because the sensor net  10  must be woven in length of several tens of meters. 
         [0051]    One of the fixtures  20  is mounted on the pin located at the outermost position of the intrusion sensor net  10 , which will be woven. A concrete structure of the fixture  20  is illustrated in  FIG. 8 , and the fixture  20  includes a through hole  23  for inserting the pin  22  thereinto and is mounted on the cylindrical body. The fixture  20  further includes a sensing line fixing hole  24  that has a direction of a central axis, which is not identical to a direction of a central axis of the through hole  23 , preferably, that is mounted at right angles to the direction of the central axis of the through hole  23 . As shown in  FIG. 8 , a slit  25  is formed on one side of the sensing line fixing hole  24 . When the sensing line, for instance the coaxial cable, is fit into the sensing line fixing hole  24 , the slit  25  is opened, and the sensing line is put into the sensing line fixing hole  24 , so that the sensing line can be caught to the sensing line fixing hole  24 . 
         [0052]    First, as shown in the upper part of  FIG. 4 , the sensing line  11  passes through the sensing line fixing hole  24  of the first fixture  20   a  of the line  1 , and then is caught to the first pin  22   a  of the line  2 . After that, the sensing line  11  passes through the sensing line fixing hole  24  of the second fixture  20   b , and then is caught to the second pin  22   b  of the line  2 . The operation continuously progresses in the above fashion in order, and then, the sensing line passes through the sensing line fixing holes  24  of the rightmost pins of the line  1  and the line  3  in order. 
         [0053]    After that, as shown in the central part of  FIG. 4 , the ongoing sensing line  15   a  and the spare sensing line  15   b  move in an arrow direction together. In this instance, the sensing line goes over the zigzag-shaped sensing line, which is mounted previously, at the intersection where the first pin  22   c  is mounted, (refer to the circled part in the drawing) and goes under the zigzag-shaped sensing line near the next pin  22   d  (refer to the circled part in the drawing), and then, goes over the zigzag-shaped sensing line near the next pin  22   e . The above work is repeated in an alternating fashion. 
         [0054]    After that, as shown in the lower part of  FIG. 4 , the ongoing sensing line  15   a , which is moved to the leftmost side, and the spare sensing line  15   b  are respectively caught to the sensing line fixing holes  24  of the leftmost fixtures  20   a  and  20   f . In this instance, the ongoing sensing line  15   a  and the spare sensing line  15   b  are respectively twisted once as shown in the drawing, and then, caught to the fixtures. 
         [0055]    When the above work is finished, the ongoing sensing line  15   a  becomes the central line that connects the vertices of the zigzag shape. After that, as shown in the upper part of  FIG. 5 , the spare sensing line  15   b  is caught to the pins  22   f  and  22   g  of the line  3  in order. In this instance, the spare sensing line  15   b  is caught to the pins  22   f  and  22   g  in such a way as to have the structures illustrated in the enlarged figures of the central part of  FIG. 3 . In other words, the spare sensing line  15   b  is caught to the pin  22   f  after being pulled over the central line, and then, caught to the pin  22   g  after being pulled under the central line, and the sensing line  15   a  is caught to all the pins of the line  3  by alternatingly repeating the above steps. Through the above process, one of the zigzag-shaped sensing lines can be interlaced not only with the other zigzag-shaped sensing lines but also with the central line. Furthermore, the woven pattern of the present invention has a structure that the zigzag-shaped sensing lines adjacent to the pins  22   j ,  22   k , . . . prop one side of the central line up but press down the other side of the central line, and hence, a weaving form that the central line is curved adjacent to the pins  22   j ,  22   k , . . . can be made. In other words, referring to the two circled enlarged figures, which illustrate the weaving forms adjacent to the pins  22   j  and  22   k , in the central part of  FIG. 5 , in the enlarged figure of the region of the pin  22   j , the central line is pressed down because the two zigzag-shaped sensing lines go over the central line at the left of the central line. Additionally, at the right of the central line, the central line is propped up because the two zigzag-shaped sensing lines go under the central line. Accordingly, the central line is vertically curved near the pin  22   j.    
         [0056]    In the meantime, in the enlarged figure of the region of the pin  22   k , the central line is pressed down at the right of the central line but is propped up at the left of the central line, and hence, the central line is vertically curved near the pin  22   j.    
         [0057]    Due to the curves of the central line, the zigzag-shaped sensing lines that are interlaced with each other near the pins  22   j ,  22   k , . . . are in a state where it is difficult that they slide from side to side along the central line. Therefore, the sensor net according to the present invention has a structure that it is difficult to open or widen the intervals formed between the sensing lines when someone tries to intrusion. 
         [0058]    The above weaving pattern is formed in the case that the fixtures  20   a ,  20   b ,  20   c , . . . deployed in the line  1  are even numbers. If the fixtures are deployed in odd numbers, as shown in the circled enlarged figures of  FIG. 7 , a weaving pattern that the central line is not curved and the zigzag-shaped sensing lines are interlaced with the central line as well as each other is formed. 
         [0059]    After the work is started, as shown in the lower part of  FIG. 5 , the ongoing sensing line is wound and fastened to the rightmost fixture  20   g  of the line  3 . After that, the ongoing sensing line  15   c  and the spare sensing line  15   d  are formed, and they continue work in the arrow direction. While the work progresses in the arrow direction, the sensing line goes over one of the two lines of the zigzag-shaped line formed by the pin and goes under the other one of the two lines, and goes under one of the two lines of the zigzag-shaped line formed by the next pin and goes over the other one of the two lines, (refer to the enlarged figures of  FIG. 5 ), and then, the sensing line goes through all vertices of the zigzag-shaped line in order in an alternating fashion. 
         [0060]    After that, the sensing line  15  passes through the sensing line fixing hole  24  of the leftmost fixture  20   h  of the line  3 , and then, the spare sensing line  15   d  is caught to the first pin  22   h  and the second pin  22   i  of the line  4 . In this instance, like the weaving pattern illustrated in the enlarged figure of the upper part of  FIG. 6 , the spare sensing line  15   d  is caught to the pin after being pulled over the central line, and then, caught to the pin after being pulled under the central line, and the sensing line  15   a  is caught to all the pins of the line  4  by alternatingly repeating the above steps. 
         [0061]    As described above, after the sensing line is caught to all the pins of the line  4 , the sensing line passes through the sensing line fixing holes  24  of the fixture  20   i  of the line  3  and the fixture  20   j  of the line  5 . 
         [0062]    After that, the ongoing sensing line and the spare sensing line are woven as shown in the central part of  FIG. 4  while they go in the arrow direction, and the above steps are alternatingly repeated. 
         [0063]    As a result of the weaving work, the sensor net is woven into a wanted length, and then, finishing work is carried out. That is, as shown in the lower part of  FIG. 6 , fixtures  20  are deployed to all the pins of the final line, and the sensing line is caught and fixed not to the pin but to the sensing line fixing hole  24  of the fixture  20 , and then, the sensing line, which passed through the final fixture, is remained as the spare sensing line  12  of a predetermined length. 
         [0064]    The spare sensing line must pass through the through hole  23  of the fixture  20 , which will be mounted on the circumference, and must be tied to form knot portions  13  along the edge of the sensor net on the spot, and hence, it is preferable that the spare sensing line has a spare length of more than 120 cm in consideration of steps, which will be described later, in the case of the intrusion sensor net that is about 30 m long. 
         [0065]      FIG. 9  illustrates a clip  30  that is mounted at the intersection of the inner sensing line of the intrusion sensor net  10 . The intersection nodes of the sensing lines formed at the pins  22   a  and  22   b  are not loosened or tangled by themselves even though the intrusion sensor net is separated from the pins because the sensing lines are twisted mutually. However, in order to more firmly hold the position and form of the intersections, the clips  30  may be mounted. 
         [0066]    Each of the clip  30  is in a plate type having a hole  31  formed at the center thereof and a split portion  32  formed on one side thereof, so that the sensing line is seated on the hole  31  of the clip through the split portion  32  at the intersection of the sensing lines. In this instance, because the diameter of the hole  31  is not large, when the sensing line is forcedly seated and tightened on the hole, the sensing line is firmly fastened not to be moved. 
         [0067]      FIG. 10  illustrates a spread state of the finished intrusion sensor net  10 . 
         [0068]    Now, the intrusion sensor net  10  of the spread state is examined. After that, on the spot, the spare sensing lines  11  and  12  bind the through hole  23  of each fixture and the pole of the security facility together in order, and thereby, the intrusion sensor net is installed. Meanwhile, in order to keep the entire shape of the intrusion sensor net and form a stronger sensor net which is not untied or does not get loose, it is preferable that finishing work that the spare sensing lines  11  and  12  pass through the through holes  23  of the fixtures along the edge of the intrusion sensor net is carried out. 
         [0069]    The finishing work is carried out in such a fashion that one of the spare sensing line  12  passes through the through hole  23 , which is the hole where the pin is inserted during the weaving work, along the edge of the sensor net from the fixture  21   b  to the fixture  21   k  in order. When the spare sensing line  12  passes through the through hole  23 , the steps of passing the spare sensing line from the top to the bottom and passing it from the bottom to the top are alternatingly repeated. After the spare sensing line  12  passes through the through hole  23  of the final fixture  21   k , it retraces the steps. Accordingly, the spare sensing line  12  passes through the through holes  23  again in a reverse direction. 
         [0070]    Moreover, the other spare sensing line  11  also passes through the through hole  23  of the fixture  21   a  from the top to the bottom and passes through the through hole  23  of the next fixture from the bottom to the top, and the spare sensing line  11  passes through all the through holes  23  from the fixture  211  to the fixture  21   l  to  21   a  along the edge of the sensor net in order by alternatingly repeating the above steps. After the spare sensing line  11  passes through the through hole  23  of the final fixture  21   a , it retraces the steps. Accordingly, the spare sensing line  11  passes through the through holes  23  again in a reverse direction. 
         [0071]    Through the above process, the spare sensing line going from the top to the bottom and the spare sensing line going from the bottom to the top are mounted at the through hole  23  of the fixture. Furthermore, such a weaving pattern serves to firmly hold the spare sensing lines such that the sensing lines of a ring shape collected to the edge portion during the weaving process do not get loose. For instance, as shown in the central part of  FIG. 6 , in case of the rings formed on the three sensing lines collected to the fixture  20   i , the spare sensing line first passes through the through hole  23  of the fixture  20   i  from the top to the bottom, and then, second passes through the through hole  23  from the bottom to the top, so that the weaving pattern, in which the three rings of the sensing line cannot be separated or loosened, can be formed. In this instance, the through hole  23  of the fixture  20  must be located at the inner position where it is interlaced by all the three rings of the sensing line, namely, in an inward direction of the intrusion sensor net (refer to the position of the hole formed in the fixture  20   i ). 
         [0072]    After the above process, the intrusion sensor net is completed, and then, the finished intrusion sensor net is installed on the spot using the spare sensing line. The step of passing the spare sensing line from the fixture  21   b  to the fixture  21   k  and from the  21   l  to the  21   a  is carried out in any one of the clockwise direction and the counterclockwise direction along one half of the entire edge of the sensor net and carried out in the reverse direction along the other half of the edge of the sensor net. The intrusion sensor net manufactured by the above weaving work has the structure that does not come undone and it is difficult to open or widen the gaps of the sensor net. 
         [0073]    When the intrusion sensor net  10  is attached to the security facility in the spot where the security facility such as a security fence is installed, the intrusion sensor net  10  is located in a good attachment position, and then, the steps of binding the poles of the security facility and the through holes  23  of the fixtures  20  together along the edge of the intrusion sensor net  10  using the spare sensing lines  11  and  12  are carried out in order. 
         [0074]    As described above, the fixture  20  is mounted at the point  14  of the edge of the intrusion sensor net  10  where the sensing lines are collected. 
         [0075]      FIG. 3  briefly shows how to install the intrusion sensor net  10 . As shown in  FIG. 3 , the knot portions  13  for binding the through holes  23  of the fixtures  20  and the security facility with each other are formed as many as the number of the fixtures mounted on the edge of the intrusion sensor net  10 , and hence, the intrusion sensor net  10  can be firmly mounted on the security facility. 
         [0076]    After the intrusion sensor net  10  is attached to the security facility, the spare sensing lines  11  and  12  are connected to the sensor  40  for sensing a change of a signal of the sensing lines due to cutoff of the sensing lines. 
         [0077]    In the case that the sensing lines are double-line cables like the coaxial cable, it is not necessary to connect all of the two spare sensing lines  11  and  12 , but one of the spare sensing lines is connected to the sensor and the other one is configured in such a fashion that the double lines inside the cable are electrically connected with each other. 
         [0078]    In the meantime,  FIGS. 11 and 12  illustrate a weaving machine for weaving the intrusion sensor net  10 . 
         [0079]    A support  80 , which is a body of the weaving machine, serves as a body for supporting all components of the weaving machine and supports a cylindrical body  50 , where the intrusion sensor net  10  is woven, in such a way that the cylindrical body  50  is rotated by a bearing  65 . 
         [0080]    A gear  63  is joined to a shaft of the cylindrical body  50  at one side of the cylindrical body  50 . The gear  63  is connected with a gear  61  joined to a rotary axis of a driving motor  60  via a chain  62 , so that the cylindrical body  50  is rotated according to the rotation of the driving motor  60 . 
         [0081]    Because the weaving work of the intrusion sensor net  10  inside the cylindrical body  50  is finished by the unit of the lines, where the pins are deployed, it is preferable that the cylindrical body  50  is rotated as much as a predetermined interval whenever the weaving work of one or two lines is finished. Therefore, it is preferable that the driving motor  60  is a step motor. Moreover, the cylindrical body  50  is rotated as much as a fixed distance in such a fashion that the driving motor works whenever a user pushes a motor switch  69  once. 
         [0082]    As shown in  FIG. 11 , the cylindrical body  50  has a plurality of columns of pins (D) formed along the circumference thereof. One of the columns is formed by a plurality of pins deployed in one line, and another column located adjacent to the first column has pins deployed at the locations facing the region in-between the pins of the first column. Furthermore, the plurality of the pin columns are formed by alternatingly repeating the deployment of the above columns (refer to the deployment of the pins of the cylindrical body illustrated in  FIG. 11 ). 
         [0083]    It is preferable that gaps between the pins and gaps between the columns formed on the cylindrical body are all identical and that the columns are deployed in such a fashion that the pins are deployed at the locations corresponding to the region in-between the pins of the neighboring columns. 
         [0084]    Additionally, the cylindrical body is molded in a drum shape and the plurality of the pins are protrudingly formed on the surface of the cylindrical body. However, in order to make manufacturing of the weaving machine easy, a plurality of pin support rods  51 , each of which has one column of the pins, are deployed between disc bodies  52  and  53  along the circumferences of disc bodies  52  and  53 , such that the cylindrical body can be made. Such a manufacturing method can remove inconvenience that the pins are fixed on the surface of the drum body. 
         [0085]    The width of the intrusion sensor net  10  woven by the weaving machine is determined by the width woven in the cylindrical body. Accordingly, the width of the woven intrusion sensor net  10  can be controlled by the number of the pins  22  mounted on the fixtures  20  as necessary. 
         [0086]    Meanwhile, a manual rotator  64  is mounted on the shaft of the cylindrical body  50  to prepare for an emergency that the driving motor does not work. 
         [0087]    Furthermore, a working interval indicator  67  is mounted on the other side of the cylindrical body  50  in interlock with the shaft of the cylindrical body  50 . Additionally, an alarm  68  sounding for the end of work is connected to the working interval indicator  67  to indicate the progress of work, such as a rotational amount of the cylindrical body  50 , a converted length of the intrusion sensor net, and so on, and to raise the alarm at a previously set completion time, for instance, at a predetermined length, so that the user can end the weaving work. 
         [0088]    In the weaving machine having the above structure, the intrusion sensor net  10  is woven in the previously described weaving method while being rotated by a fixed quantity according the working speed of the cylindrical body  50 . When the length of the intrusion sensor net  10  increases as the weaving work progresses, the woven intrusion sensor net  10  goes over the circumference of the cylindrical body  50 . After that, the intrusion sensor net  10  backwardly went over the cylindrical body  50  is automatically separated from the cylindrical body  50  at a predetermined point by the rotation of the cylindrical body. The reason is that the separated sensor net  10  is rolled on a winding rod  70  that is located adjacent to the cylindrical body and rotates in interlock with the cylindrical body  50 . The above action occurs because the fixtures  20  mounted in the line  1  of the cylindrical body  50  are respectively caught to the pins  74  of the winding rod  70  and the winding rod  70  rolls the intrusion sensor net  10  while rotating, after the intrusion sensor net  10  is woven into a predetermined length. Moreover, the intrusion sensor net  10  woven in the cylindrical body  50  is automatically separated from the pins in a state where it is rotated at a predetermined angle or more along the circumference of the cylindrical body  50 . 
         [0089]    Meanwhile, a connection gear  66  is mounted at an end portion of the shaft of the cylindrical body  50 . The connection gear  66  is connected with the winding rod  70 , which winds the woven intrusion sensor net  10  thereon, via a belt or a chain, so that the winding rod  70  is rotated in interlock with the cylindrical body  50 . 
         [0090]    However, because the length that the woven intrusion sensor net  10  is separated from the cylindrical body  50  and the length that the intrusion sensor net  10  is wound on the winding rod  70  are not identical with each other and the entire diameter of the winding rod is gradually increased as an amount of the intrusion sensor net  10  wound on the winding rod is increased, it is necessary to control a rotation rate of the cylindrical body  50  and the winding rod  70  as the weaving work progresses (the rotation rate of the winding rod is gradually reduced because the diameter of the winding rod increases due to an increase of the amount of the sensor net  10  wound on the winding rod  70  as the weaving work progresses). Accordingly, a controller is additionally mounted to control the rotational speed and the rotational rate of the cylindrical body  50  or a transmission gear  71  is mounted to reduce the rotational speed of the winding rod  70  according to the progress of the weaving work. 
         [0091]    The intrusion sensor net  10  wound on the winding rod  70  is rewound on a bar  75  of an appropriate length after the weaving work is ended. The bar  75  on which the intrusion sensor net  10  is wound is moved to a different place and spread out for inspection or finishing work. According to circumstances, the bar  75  can be moved to an installation spot and the intrusion sensor net  10  is attached to the security facility. 
         [0092]    As described above, the intrusion sensor net used for the unmanned outdoor security system according to the present invention is installed to security facilities, such as security fences, to prevent someone&#39;s intrusion and monitor the surrounding environments. Therefore, it can be widely installed and utilized in various places, such as military camps, detention facilities, restricted areas, and so on.