Abstract:
A chain-control device for solar road studs is provided to work by using a plurality of solar cells to convert solar energy into electric energy during daytime and store it in a battery unit, so that they can flash in nighttime for traffic security purpose or gardening deposition. The primary merit of the present invention is, first of all, free of wiring job, no need of city power, good conformity with environment protective conditions. Because of a successful chain control function, the existing random flash performance could be substituted with an interactive chain control flash or a synchronous flash performance, which is also applicable to gardening for fancy flash performance.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a chain-control device for solar road studs, which is capable of setting road studs into an interactive chain-control state for presenting a simultaneous or fancy flash, as well as a solar energy flash device.  
         [0003]     2. The Prior Arts  
         [0004]     Solar road studs are usually disposed on the shoulders and the median of a highway, which, particularly in our local areas, would rather flash randomly than synchronously or interactively.  
         [0005]     As the shoulders and the median of road can be viewed more clearly, to flash the road studs synchronously or interactively is preferred. Taking the local solar road studs for instance, the flash period of each road stud is 0.5 seconds approximately. However, there is no time interval regulated between one stud to the next, which could be any value from 0.3 seconds to 1 second according to different tolerances of different components and charged electricity quantity of batteries. To our opinion, a good timing sequential flash of chain-control mechanism would be preferred, which could be done usually by triggering one after another in sequence.  
         [0006]     A solar flash system is basically a wireless system needing no wiring job or city power. For achieving the chain control purpose, the control signals could be carried by IR (Infra-Red) ray or RF (Radio Frequency) signals.  
         [0007]     The appearance of a shoulder&#39;s road stud is shown in  FIG. 1 , in which an IR receiver commonly applied in a generic electric home appliance, such as a remote controller for TV set or video recorder, is adopted on account of its cost, noise resistivity, and power consumption. An example is TSOP1838SS3V of VI SHAY, which has a working voltage of 3V, an IR carrier signal at 38 KHz, and a high enough sensitivity to IR for receiving a signal radiated from as distant as 35 m away, and a fast response ability for receiving a signal in 1 msec.  
       SUMMARY OF THE INVENTION  
       [0008]     The present invention relates to a chain-control device for solar road studs, in which solar cells are employed to convert solar energy into electric energy in daytime and stored in a battery unit, so that those road studs can flash in nighttime for traffic security purpose or gardening deposition. The present invention needs no wiring job or city power, and it can well conform with environment protective conditions. Unfortunately, however, the existing flash devices flash randomly, they do not provide a chain control flash style.  
         [0009]     Therefore, the primary object of the present invention is to provide a chain-control device for solar road studs, which requires no wiring job and flashes interactively in a chain-control operation.  
         [0010]     Another object of the present invention is to provide a free-of-wiring-job chain-control device for solar road studs, in which the chain control signals are transmitted by IR or RF carrier waves, and the encoded digital control signal may comprise control instructions, flash instructions, color-control instructions, remote control setting instructions, and sovereignty transfer instructions.  
         [0011]     Yet, another object of the present invention is to provide a chain-control device for solar road studs, in which a flash device, when it starts to flash, will trigger a next road stud and so on such that a chain-control flash could be made to show a lighting point sliding along the median and shoulders distinctly.  
         [0012]     A further object of the present invention is to provide a solar energy flash device.  
         [0013]     For more detailed information regarding advantages or features of the present invention, at least an example of preferred embodiment will be described below with reference to the annexed drawings. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]     The related drawings in connection with the detailed description of the present invention to be made later are described briefly as follows, in which:  
         [0015]      FIG. 1  shows the appearance of a solar road stud on road shoulder,  
         [0016]      FIG. 2  shows the internal configuration of the solar road stud of the present invention;  
         [0017]      FIG. 3  shows a linearly disposed IR-control detailed circuit;  
         [0018]      FIG. 4  shows the key distribution of a remote controller;  
         [0019]      FIG. 5  is a linear distribution diagram; and  
         [0020]      FIG. 6  is a two-dimensional distribution diagram. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0021]     The present invention relates to a chain-control device for solar road studs, as well as a solar energy flash device. In a road stud system related to the present invention, a plurality of road studs is driven and controlled to flash synchronously or in fancy styles by a chain control technology. Each road stud shown in  FIG. 2  comprises an input device  130  for receiving IR or radio encoded digital flash control signals; a processing device  150  for receiving the flash control signals delivered from the input device  130 , controlling flash, and executing commands according to different encoded control instructions; and an output device  170  for receiving flash style from the processing device and outputting a flash control signal by means of RF or IR carrier.  
         [0022]     The road studs are supposed, under a linear or two-dimensional disposition, to present a synchronous flash or a fancy flash performance regularly, in which the fancy flash is mostly applied for gardening creative purposes in two dimensions, in which each road stud is provided with an ordinal number and a predetermined time interval between flashes and flash colors to present different flash effects by a sovereignty transfer instruction.  
         [0023]     Moreover, the input device  130  in an interactive chain control device for solar road studs is substantially a front-end signal receiver  131  for receiving IR or radio carrier frequencies.  
         [0024]     Yet, the processing device  150  further comprises a power supply unit  153  for supplying electric power to the processing device, a microprocessor unit  155  for determination of the flash style by availing the power supplied by the power supply unit, a memory unit  157  for the microprocessor unit  155  to fetch data of a specified flash style.  
         [0025]     Yet, the power supply unit  153  further comprises a solar cell-board unit  156  for transferring solar energy into electric energy, and a battery unit  158  for storing the electric energy delivered from the solar cell-board unit  156  and outputting a first control signal for judging whether it is now in daytime or nighttime. The memory unit  157  could be an EEPROM (Electrically Erasable Programmable Read-Only Memory) employed to store the parameters of working manners of the road stud, flash intervals, fancy flash styles, ordinal numbers, and colors.  
         [0026]     Yet, the output device  170  for transmitting flash control signals by means of RF or IR carrier further comprises a rear-end signal transmitter  171 , which could be an IR emission diode or RF transmitter, for outputting the flash control signals; and a light-emitting diode  179 , in which a monochrome diode is applied for a generic road stud and a RBG diode unit is applied to gardening arts for offering people with a splendid and color-enriched impression.  
         [0027]     Yet, the input device  130 , which is a front-end signal receiver  131 , could be a TSOP1830SS3V of VISHAY to be worked at 3 V.  
         [0028]     Yet, the microprocessor unit  155  is substantially a microprocessor, and in this case, a PIC12CE518 of MICROCHIP having a built-in EEPROM and SLEEP MODE function for energy saving is adopted.  
         [0029]      FIG. 3  shows a linearly disposed IR-control detailed circuit. The circuit is comprised of a solar cell-board unit  330  for transferring received solar energy into electric energy, and a battery unit  333 . In this circuit, the solar cell-board unit  330  is supposed to charge the battery through a diode D 1 ; after pin GP 1  of the microprocessor PIC12CE518 outputs LOW to have a capacitor C 1  discharged, the pin GP 1  is turned to be an input end with a high impedance to detect the solar cells through a resistor R 1 ; then, the microprocessor shall go judging whether it is now in daytime or not by detecting the charging state of the capacitor C 1 , if positive, C 1  is charged gradually, otherwise the microprocessor should prepare to flash.  
         [0030]     By the way, an auxiliary IC MCP809 of Microchip is also provided to inspect the power voltage to keep the microprocessor working smoothly. A second pin GND of the IR receiver TSOP18X of VISHAY is connected with pin GP 2  of the microprocessor. In the duration between two flashes, the microprocessor would enter a SLEEP MODE to consume current in 2μA only to lower down the power consumption, and the receiver might be shut down then and there and reopened at the moment the microprocessor is supposed to receive a flash trigger signal so that more power consumption can be saved. Also, in the microprocessor, pin GP 5  outputs LOW to lighten an LED D 3 , while GP 4  outputs LOW to lighten an IR LED D 2 .  
         [0031]     The related flash parameters are stored in the EEPROM of the microprocessor. The operating highlights are summarized as the following: 
        (1) A flash period may be set at 0.5 seconds for example. The microprocessor is requested to flash repeatedly by this period on it&#39;s own before a flash control signal is detected and received.     (2) A detection time for detecting a flash control signal may be set at 0.4 seconds for example. It is meant to detect for the next flash control signal by the end of an elapsed 0.4 seconds after a previous flash is finished, while the microprocessor would enter the SLEEP MODE before the critical 0.4 seconds for saving power consumption.     (3) An ending time for receiving a flash control signal may be set at 0.55 seconds for example. As mentioned above, the microprocessor is requested to flash on it&#39;s own by the period of 0.5 seconds if no flash control signal is available, and after a predetermined times to have no flash control signal received, the receiving function is opened once more continuously to obtain the synchronism. Hence, every flash device may serve for an initial flash device to perform a synchronous control and maintain the power-consumption saving function.     (4) A serial number is offered to every flash device. Therefore, it is possible to effect a flash style made by the odd-numbered flash devices and the even-numbered flash devices alternately.     (5) The flash device works either in a chain flash style or a synchronous flash style, in which, under the chain flash style, a flash device flashes upon receipt of a chain-control signal and meanwhile forwards a chain-control signal to the next flash device to perform the same; while, under the synchronous flash style, upon receipt of a flash control signal, a flash device would transmit the same immediately to the next flash device in recursion (plus 1), then the microprocessors will calculate and compensate the time delayed to therefore perform a synchronous flash.     (6) If desired, there can be other parameters.        
 
         [0038]     In regard to the setting procedure of the flash device parameters, detailed description is made below.  
         [0039]     In every road stud, the flash style parameters could be preset in the EEPROM by maker or set on site. Because an IP or RF receiver is arranged in each road stud, therefore, it is possible to set the parameters with a remote controller shown in  FIG. 4 , without increasing the cost.  
         [0040]     For setting a single one or all the road studs with a remote controller, the interaction between the remote controller and every corresponding road stud is described below.  
         [0041]     First, a user has to make sure that a road stud to be set is in the stand-by state; then, depress a key “calling a flash device”. The road stud starts to flash in a time interval of 0.5 seconds for example, upon receipt of the signal “calling a flash device” sent from the remote controller. The road stud would return to the stand-by state again in the event that no “Yes” signal is received from the remote controller within 5 seconds afterwards, or the road stud would flash repeatedly with the time interval of 0.5 seconds if the “Yes” signal is received within 5 seconds as expected.  
         [0042]     In the next step, the user may choose to set all the road studs or a single one.  
         [0043]     If setting all the road studs is desired, the user has to first depress in sequence a key “Set all”, “Parameter”, parameter value “nnn”, then “Confirmation (Yes)”. The remote controller will send all the parameters out, and this time each the road stud will flash rapidly with a time interval shorter than 0.5 seconds. This action continuous until all the data is stored, and then, the road studs begin to flash with the time interval of 0.5 seconds.  
         [0044]     On the contrary, if setting a single road stud is desired, the user needs to depress in sequence a key “Set single”, “serial number of stud”, “Parameter”, parameter value “nnn”, then “Confirmation (Yes)”. A road stud to be set having a serial number corresponding to code sent by the remote controller will receive and update the parameter value (nnn). At this time, this road stud will flash rapidly with a time interval shorter than 0.5 seconds, which is then changed into 0.5 seconds after the data received is stored.  
         [0045]     In addition, the depositing and mounting method of the interactive chain-control devices of solar road studs is suggested to perform according to the following steps:  
         [0046]     The first step is a step for deciding a linear or a two-dimensional deposition.  
         [0047]     The second step is a step for installing a plurality of road studs according to the chosen deposition.  
         [0048]     The third step is a step for deciding the flash style.  
         [0049]     The fourth step is a step for setting the working parameters to the road studs with a remote controller.  
         [heading-0050]     First Example for Road Security Studs  
         [0051]     The system is controlled by IR in unidirectional receiving and unidirectional transmitting.  
         [0052]     In the linear deposition shown in  FIG. 5 , two dotted lines represent the roadsides (the shoulders); a string of road studs is mounted in the median and defined as the median studs, which are divided into odd-numbered and even-numbered median studs and interpolated intermittently, in which the even-numbered studs are arranged to receive the flash control signals from the right to the left, while the odd-numbered studs are arranged to receive the flash control signals from the left to the right.  
         [0053]     The foregoing arrangement of the odd-numbered and the even-numbered median studs may be inversely arranged.  
         [0054]     The intermittently interpolated median studs could be fully viewed by the wagon flow from the right to the left and vice versa to show meaningful directions and paths for signal transmission.  
         [0055]     Besides, there is a string of road studs aligned on a top end of the road, which is defined as shoulder studs, in which the shoulder studs on the top end will receive the flash control signals in the same direction with the wagon flow, which directs to the left from the right. Also, there is another string of road studs aligned on a bottom end of the road, which is defined as shoulder studs too, in which the shoulder studs on the bottom end will receive the flash control signals in the same direction with the wagon flow, which directs to the right from the left.  
         [heading-0056]     Second Example for Gardening Deposition  
         [0057]     A plurality of flash devices in accordance with the present invention is installed in two dimensions as shown in  FIG. 6 .  
         [0058]     As illustrated in  FIG. 6 , a circular center space is a landscape-viewing section, which is provided on two sides with respective aisles and a plurality of flash marking devices interspersed in a substantially two-dimensional distribution, in which two asterisk symbols represent the flash markings radiating flash control signals.  
         [0059]     In gardening arts, the direction-indiscriminating RF control signal is more effective in a larger scope than that of IR. Therefore, it is possible to locate a RF transmitter in a center position of a garden for controlling all flash devices mounted therein.  
         [0060]     In the above described, at least one preferred embodiment has been described in detail with reference to the drawings annexed, and it is apparent that numerous changes or modifications may be made without departing from the true spirit and scope thereof, as set forth in the claims below.