Abstract:
A control device obtains water level information and transfers the information to a control room through an indoor power unit coordinated with a unit for collecting the water level information and a unit for adding power frequency carrier carrying the water level information.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to a control device; more particularly, relates to transferring information in a water-level control device to a control room for a user through an indoor power unit.  
       DESCRIPTION OF THE RELATED ART  
       [0002]     A prior art called a water-level monitoring device with a mutual power operation is disclosed in Taiwan, as shown in  FIG. 5  and  FIG. 6 , where a minute-control circuit controls a mutual operation of two power sets, coordinated with two sets of multi-stage water-level indicators. The minute-control circuit comprises a microprocessor  6 , an I/O unit  60 , two power switches  61 , two phase-failure detecting circuits  62 , a transforming circuit for overload and electric-leakage signal  63 , an alarm circuit  64 , a water-level signal transforming circuit  65  and a display unit  66 . Therein, the microprocessor  6  comprises signal connections with the above circuits through the I/O unit  60  and a bus; a key set is connected to an input pin of the microprocessor  6  for setting up functions by a user; the two power switches  61  control power sources for motors of the two power sets; input ends of the two phase-failure detecting circuits  62  are respectively connected to three-phase power supplies of the motors, and their output ends are connected to the microprocessor  6  through the I/O unit  60 ; the transforming circuit for overload and electric-leakage signal  63  obtains information of overload and electric-leakage from circuit breaker for overload and electric-leakage, where the circuit breaker is deposed on power source ends of the motors; and, input ends of the water-level signal transforming circuit  65  are respectively connected with metal probes  68  of two water-level detector  67  and their output ends are connected to the microprocessor  6  through the I/O unit  60 . When installing, the metal probes  68  are deposed in upstairs and downstairs water towers with two water-level detectors  67  to transfer different signals of water level detected by the metal probes  68  to a display unit  66   66  for an operator to monitor the status of the water towers  7 .  
         [0003]     Although the operator can monitor the statuses of the water towers through the water-level monitoring device of the prior art, the wiring process for required power lines is complex, where the required power lines connect the water towers  7  and related control devices and then connect to a control room and so an origin of a damage in the power lines can not be found easily. Besides, the operator of the water-level monitoring device can obtain the statuses of the water-level monitoring device and the water towers  7 ; but, an ability of giving feedback to operate the motors is something short of. So, the prior art does not fulfill users&#39; requests on actual  
       SUMMARY OF THE INVENTION  
       [0004]     The main purpose of the present invention is to transfer information in a water-level control device to a user-requested control room through an indoor power unit coordinated with a water-level signal unit and a transforming unit.  
         [0005]     To achieve the above purpose, the present invention is a water-level control device having power frequency carrier, comprising a water-level signal unit connected with sensing probes and pumps, where each sensing probe is connected with a display unit; a transforming unit comprised of a power I/O module, a power carrier module, a single-chip control module and a signal I/O module, where the signal I/O module is connected with the water-level signal unit; and an indoor power unit connected with the power I/O module of the transforming unit. Accordingly, a novel water-level control device having power frequency carrier is obtained.  
     
    
     BRIEF DESCRIPTIONS OF THE DRAWINGS  
       [0006]     The present invention will be better understood from the following detailed description of the preferred embodiment according to the present invention, taken in con junction with the accompanying drawings, in which  
         [0007]      FIG. 1  is a perspective view showing a preferred embodiment according to the present invention;  
         [0008]      FIG. 2  is a block-diagram view showing the preferred embodiment according to the present invention;  
         [0009]      FIG. 3  is a perspective view showing a state of use of the preferred embodiment according to the present invention;  
         [0010]      FIG. 4  is a block-diagram view showing the state of use of the preferred embodiment according to the present invention;  
         [0011]      FIG. 5  is a structural view of a prior art; and  
         [0012]      FIG. 6  is a circuit view of the prior art. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0013]     The following description of the preferred embodiment is provided to understand the features and the structures of the present invention.  
         [0014]     Please refer to  FIG. 1  and  FIG. 2 , which are a perspective view and a block-diagram view showing a preferred embodiment according to the present invention. As shown in the figures, the present invention is a water-level control device  1  having power frequency carrier, comprising a water-level signal unit  11 , a transforming unit  2  and an indoor power unit  3 , where the water-level signal unit  11  and the transforming unit  2  are set in a case  12  and the indoor power unit  3  is located outside of the case  12  to directly transfer information from the water-level control device  1  using power frequency carrier through an indoor power line to a user-requested control room.  
         [0015]     The water-level signal unit  11  is connected with a plurality of sensing probes  13  and pumps  14 , where each sensing probe  13  is connected to a display unit  15  set in a control panel  121  on an end surface of the case  12 .  
         [0016]     The transforming unit  2  comprises a single-chip control module  21 , a power carrier module with a transferring rate of 1200 BPS (bit per second), a signal I/O (input/output) module  23  and a power I/O module  24 , where the signal I/O module is connected to the water-level signal unit  11 . The single-chip control module  21  comprises an input unit  211 , an output unit  212 , a control unit  213 , a communication interface  214  and a relay  215 . The control module  213  is a 8051 single-chip processor having excellent inner structure with a working frequency up to 16 MHz, comprising a 4 k size of electrically programmable and erasable ROM (Read Only Memory), and eight input pins and eight output pins. The relay  215  is located at the output pins to quarantine the circuit for securing a n d ensuring the operation of the single-chip control module  21 . The 8051 single chip contains a full-duplex communication interface  214  in side. The communication interface  214  can be an RS232 interface to transfer and receive data simultaneously from outside. Because the operational signals are on a TTL (transistor-transistor-logic) level (0 voltage set as logic 0; +5 voltage set as logic 1) and the communication interface  214  is a serial communication interface to transfer or receive data in a form of series of bits, linkages can be easily established between controllers (such as absorbing carrier, auto-detecting device, etc.), apparatuses and computers.  
         [0017]     An end of the indoor power unit  3  is connected to the power I/O module  24  of the transforming unit  2 ; and the indoor power unit  3  comprises a plug for indoor power circuit.  
         [0018]     With the above structure, a novel water-level control device having power frequency carrier is obtained.  
         [0019]     Please refer to  FIG. 3  and  FIG. 4 , which are a perspective view and a block-diagram view showing a state of use of the preferred embodiment according to the present invention. As shown in the figures, the present invention can be applied to a livelihood water tower, a fire-fighting water tower, a cooling water tower or a factory water tower. When installing the present invention, sensing probes  13  are deposed in a water tower  4 . Outlet ends  41  of pumps  14  are deposed in the water tower  4  and intake ends  42  of the pumps  14  are connected with water source. And a water-level control device  1  is deposed in a required place, such as a basement, a distribution box or a piping room. Then a plug of the indoor power unit  3  is plugged into an indoor power circuit. Hence, in a control room, an operator can obtain a control apparatus to plug into the indoor power circuit for obtaining water level information and controlling the water tower  4  by the water-level control device  1 . Consequently, a water-level control device  1  according to the present invention is installed.  
         [0020]     On operation, with the sensing probes  13  at different height levels, the water level information of the water tower  4 , such as water level and abnormal status of the water tower  4  as well as information of the pumps  14 , are sensed and transferred to a water-level signal unit  11  to be displayed by a display unit  15  for periodical examinations done by an operator. In the other hand, the water level information in the water-level signal unit  11  is also transferred to an input unit  211  of a single-chip control module  21  through a signal I/O module  23  of a transforming unit  2 . After the information is received by the input unit  211 , the information is then transferred to an output unit  212  through a control unit  213  and a relay  215 . The information is then transferred through the output unit  212  to a power carrier module  22  to be modulated into power frequency carrier before transferring to a power I/O module  24 . So, after the water level information, including water level and abnormal status of the water tower  4  as well as information of the pumps  14 , is received by the power I/O module, the same information is then transferred to a control apparatus  5  in a control room through the indoor power u nit  3  along an indoor power line using the power frequency carrier. With the control apparatus  5  in the control room, an operator can obtain real-time water level information of water level and abnormal status of the water tower  4  as well as information of the pumps  14 . If the water level of the water tower  4  is too low, the operator can also transfer a start signal using power frequency carrier by the control apparatus  5  to be received by the transforming unit  2 . After the transforming unit  2  receives the start signal, the start signal is transferred to the water-level signal unit  11  to start required pumps for pumping water into the water tower  4  until a required water level.  
         [0021]     To sum up, the present invention is a water-level control device having power frequency carrier, where information in a water-level control device can be transferred to a control room using power frequency carrier through an indoor power unit coordinated with a water-level signal unit and a transforming unit.  
         [0022]     The preferred embodiment herein disclosed is not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention.