Power supply communication device and apparatus based on traffic signal device cooperation

Abstract

The application provides a power supply communication device and apparatus based on traffic signal lamp device cooperation, the device comprising: a power module comprising an input end and an output end, the input end of the power module being connected to a power cable of a traffic signal lamp device, and the output end of the power module being connected to a power input end of a traffic information collection device; a carrier communication module comprising an input unit, a modem and an output unit, the input unit being used to acquire traffic information collection data from the traffic information collection device, the modem being used to modulate and demodulate the traffic information collection data to obtain a power line carrier signal to be sent, and the output unit being used to output the power line carrier signal to be sent to the power cable of the traffic signal lamp device. By using the application, the power cable of the existing traffic signal lamp device is fully utilized to provide power supply and data communication for the traffic information collection device, the use cost is reduced, and redundant wiring is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of traffic information collection equipment power supply and communication, in particular to a power supply and communication equipment and device based on cooperation of traffic signal equipment. BACKGROUND

[0002] Traffic information collection equipment refers to equipment arranged on a road for collecting traffic-related data, for example, can include a camera device for shooting road vehicle video, a radar device for measuring distance, etc., and the collected data can be used for subsequent traffic event analysis, vehicle tracking, vehicle identification, etc. To ensure the use of traffic information collection equipment, independent power supply lines and independent communication lines need to be constructed for the traffic information collection equipment to supply power and data communication between the traffic information collection equipment, which will increase the workload and difficulty of field construction and result in a large amount of additional costs. In practical application, the additional costs may even exceed the cost of the traffic information collection equipment itself, and the redundant wiring causes a large amount of space and resource waste. SUMMARY

[0003] In view of the problems in the prior art, the purpose of the present application is to provide a power supply and communication equipment and device based on cooperation of traffic signal equipment, which fully utilizes the power supply cable of the existing traffic signal equipment to provide power supply and data communication for the traffic information collection equipment, reduces the use cost and reduces redundant wiring.

[0004] The present application provides a power supply and communication equipment based on cooperation of traffic signal equipment, comprising:

[0005] A power supply module comprising an input end and an output end, the input end of the power supply module being connected to the power supply cable of the traffic signal equipment, and the output end of the power supply module being connected to the power supply input end of the traffic information collection equipment;

[0006] A carrier communication module comprising an input unit, a modem and an output unit, the input unit being used to obtain traffic information collection data from the traffic information collection equipment, the modem being used to modulate and demodulate the traffic information collection data to obtain a power line carrier signal to be sent, and the output unit being used to output the power line carrier signal to be sent to the power supply cable of the traffic signal equipment.

[0007] The power supply communication device of the application comprises a power supply module and a carrier wave communication module, wherein the power supply module can use the power supply cable of the traffic signal lamp device to supply power to the traffic information collection device, without separately laying a power supply line for the traffic information collection device, and the carrier wave communication module can send the traffic information collection data collected by the traffic information collection device to the outside through the traffic signal lamp device, without separately laying a communication line for the traffic information collection device, which is beneficial to reduce the use cost of the traffic information collection device, reduce redundant wiring, save space, and facilitate construction and shorten the construction period.

[0008] In some embodiments, the input end of the power supply module is connected to the plurality of power supply cables of the traffic signal lamp device, and the power supply module comprises a multi-path fusion unit configured to fuse the multi-path input electric energy received by the input end from the plurality of power supply cables into one path of output electric energy.

[0009] In some embodiments,

[0010] The power supply module further comprises an energy storage unit configured to store the input electric energy of the power supply cable in a powered state when at least one of the power supply cables in the traffic signal lamp device is in a powered state, and release electric energy when all the power supply cables in the traffic signal lamp device are not powered.

[0011] In some embodiments, the multi-path fusion unit is configured to convert the multi-path alternating current input electric energy of the input end into direct current after alternating current / direct current conversion, and fuse it into one path of direct current output electric energy.

[0012] In some embodiments, the multi-path fusion unit comprises a first one-way conduction switch corresponding to each of the power supply cables and a second one-way conduction switch corresponding to each of the power supply cables.

[0013] The output end of the power supply module comprises a positive output end and a negative output end, and the first end and the second end of the energy storage unit are respectively connected to the positive output end and the negative output end of the power supply module.

[0014] The positive end of each of the first one-way conduction switches is connected to the corresponding power supply cable, and the negative end is connected to the first end of the energy storage unit; the positive end of each of the second one-way conduction switches is connected to the second end of the energy storage unit, and the negative end is connected to the corresponding power supply cable.

[0015] The multi-path fusion unit further comprises a third one-way conduction switch and a fourth one-way conduction switch, the positive end of the third one-way conduction switch is connected to the zero line of the traffic signal lamp device, and the negative end is connected to the first end of the energy storage unit; the positive end of the fourth one-way conduction switch is connected to the second end of the energy storage unit, and the negative end is connected to the zero line.

[0016] In some embodiments, the input unit of the carrier wave communication module comprises a control board, and the modem is arranged on the control board, and the control board is configured to communicate with the traffic information collection device, to obtain traffic information collection data from the traffic information collection device and input the traffic information collection data to the modem.

[0017] In some embodiments, the output unit of the carrier wave communication module is also arranged on the control board, and the output end of the power supply module is further connected to a power input interface of the control board, to supply power to the carrier wave communication module.

[0018] In some embodiments, the output unit comprises a coupling device, which is connected to a plurality of power supply cables in the traffic signal lamp device respectively, and couples the power line carrier wave signal to the plurality of power supply cables.

[0019] In some embodiments, the coupling device comprises a filter circuit and a mutual inductor, and the power line carrier wave signal output by the modem is coupled to the power supply cable through the mutual inductor after passing through the filter circuit.

[0020] The embodiments of the present application also provide a power supply communication device, which comprises a traffic processing device and the power supply communication device, and the traffic processing device comprises the traffic signal lamp device and / or the traffic information collection device. Since the power supply communication device can utilize the power supply cables of the existing traffic signal lamp device to provide power supply and data communication for the traffic information collection device, the power supply communication device is advantageous in reducing the use cost, reducing the redundant wiring, and reducing the construction difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the attached drawings.

[0022] Figure 1 is a structural block diagram of a power supply communication device based on cooperation of a traffic signal lamp device according to an embodiment of the present application;

[0023] Figure 2 is a structural block diagram of a power supply module according to an embodiment of the present application;

[0024] Figure 3 is a circuit schematic diagram of the power supply module according to an embodiment of the present application;

[0025] Figure 4 is a structural block diagram of cooperation of a carrier wave communication module and a power supply module according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Although the terms "first" or "second," etc., are used in this specification to denote certain features, these are merely indicative of function and not as a limitation on the number or importance of specific features.

[0027] like Figure 1 As shown, in one embodiment, this application provides a power supply and communication device M100 based on traffic signal light equipment cooperation, including a power supply module M110 and a carrier communication module M120. The power supply module M110 includes an input terminal and an output terminal. The input terminal of the power supply module M110 is connected to the power supply cable of the traffic signal light equipment M200, and the output terminal of the power supply module M110 is connected to the power supply input terminal of the traffic information collection equipment M300. The carrier communication module M120 includes an input unit M121, a modem M122, and an output unit M123. The input unit M121 is used to acquire traffic information collection data from the traffic information collection equipment M300. The modem M122 is used to modulate and demodulate the traffic information collection data to obtain a power line carrier signal to be transmitted. The output unit M123 is used to output the power line carrier signal to be transmitted to the power supply cable of the traffic signal light equipment M200.

[0028] The traffic signal device M200 here refers to the traffic lights and their auxiliary equipment installed at traffic intersections, including but not limited to traffic lights of different colors, power supply cables, etc. For some intelligent traffic signal devices, it may further include controllers, communication components, etc. The power supply cable connected to the traffic signal device M200 can be the end of the cable, which is generally located inside the housing of the traffic signal device M200. The traffic information collection device M300 mentioned here can be, for example, a camera device for collecting video on the road, a radar device for measuring distance, or other devices for collecting traffic information as needed. It can be installed at every intersection, at some intersections, or at different intersections with different types of collection devices. The traffic information collection data may include, for example, video data, image data, radar measurement data, etc.

[0029] The power line carrier signal can be transmitted to an external demand device through the power cable, such as a data receiving and processing device in the traffic signal device M200, or other data receiving and processing device accessible by the power cable, etc. Only the process of sending the traffic information collection data outward is described here. If a control signal or other type of data needs to be sent from the outside to the traffic information collection device M300, the output unit M123 can transmit the power line carrier signal transmitted from the power cable to the modem M122, which is converted into a digital signal and then transmitted to one end of the traffic information collection device M300 through the input unit M121.

[0030] Therefore, the power module M110 of the present application can use the power cable of the traffic signal device M200 to power the traffic information collection device M300, without the need to separately lay a power supply line for the traffic information collection device M300. The traffic information collection data collected by the traffic information collection device M300 can be sent outward through the traffic signal device M200 by the carrier communication module M120, without the need to separately lay a communication line for the traffic information collection device M300. This is advantageous in reducing the use cost of the traffic information collection device M300, reducing redundant wiring, saving space, and facilitating construction.

[0031] The application also provides a power supply communication device, which comprises the power supply communication equipment M100 and the traffic processing equipment, and the traffic processing equipment comprises the traffic signal lamp equipment M200 and / or the traffic information collection equipment M300. Since the power supply communication equipment M100 can take advantage of the power supply cable of the existing traffic signal lamp equipment M200 to provide power supply and data communication for the traffic information collection equipment M300, the use cost is reduced, the redundant wiring is reduced, and the construction difficulty is reduced. According to different use needs, the power supply communication device can have different configurations. For example, in the first embodiment, the power supply communication device comprises three equipment: the power supply communication equipment M100, the traffic signal lamp equipment M200 and the traffic information collection equipment M300, and the three equipment can be arranged in three equipment housings, and the three equipment can be arranged on three separate poles or can be installed on one pole; or the power supply communication equipment M100, the traffic signal lamp equipment M200 and the traffic information collection equipment M300 are integrated in one device housing to form an intelligent traffic signal lamp device with traffic transmission function. In the second embodiment, the power supply communication device comprises two equipment: the power supply communication equipment M100 and the traffic information collection equipment M300, and the two equipment can be arranged in the same device housing to form an information collection device which can directly use the power supply cable of the traffic signal lamp equipment M200, or the two equipment can be arranged in two equipment housings and installed on two poles or one pole. In the third embodiment, the power supply communication device comprises two equipment: the power supply communication equipment M100 and the traffic signal lamp equipment M200, and the two equipment can be arranged in the same device housing to form a traffic signal lamp device which can provide power supply and communication function to the outside, or the two equipment can be arranged in two equipment housings and installed on two poles or one pole. When two or three equipment are integrated in one device housing and / or installed on one pole, fewer poles can be constructed, the cost and construction difficulty of the overall traffic facility layout are further reduced, and the construction period is greatly shortened.

[0032] In this embodiment, the traffic signal lamp equipment M200 comprises a plurality of signal lamps and a power supply cable corresponding to each signal lamp. The power supply cable of each signal lamp is connected to the power supply communication equipment M100 through the power supply cable of the traffic signal lamp equipment M200. Figure 2Taking the traffic signal light device M200, which includes red, green, and yellow lights, as an example, the power supply cables include power supply cable 1, power supply cable 2, and power supply cable 3. The traffic signal light device M200 also includes a neutral wire. Each of the power supply cables is a live wire connected to each traffic light. The input terminal of the power module M110 is connected to the multiple power supply cables to obtain multiple input power from them. The multiple power supply cables are not energized simultaneously; therefore, the multiple input power obtained by the input terminal of the power module M110 is obtained within one cycle. For example, if the red, green, and yellow lights illuminate sequentially within one cycle, then the input terminal of the power module M110 obtains three input power sources within that cycle. The power module M110 includes a multi-channel fusion unit M111, which is configured to merge the multiple input power sources at the input terminal into a single output power source.

[0033] In this embodiment, because the traffic lights change color and flash periodically, the power supply cables are not always energized, and there is a brief period of overall power loss when switching between two power supply cables. According to the usual traffic light control rules, the power loss time is generally 0.5 seconds or 1 second. Therefore, the traffic light device M200 includes an energized state when at least one of the power supply cables is energized and a de-energized state when all the power supply cables are de-energized.

[0034] like Figure 2 As shown, the power module M110 further includes an energy storage unit M112. The energy storage unit M112 is configured to store the input energy of at least one power supply cable in the traffic signal device M200 when the traffic signal device M200 is energized (when the traffic signal device M200 is energized), and to release the energy when all power supply cables in the traffic signal device M200 are de-energized (when the traffic signal device M200 is de-energized). That is, the energy storage unit M110 can charge when a valid power input is available and discharge when a short-term power loss occurs, thereby providing a continuous and stable power supply to the traffic information collection device M300. Furthermore, the multi-channel fusion unit M111 is configured to convert multiple AC input power sources at the input terminal into a single DC output power source after AC / DC conversion. Therefore, in addition to the function of merging multiple input power sources into a single output power source, the multi-channel fusion unit also has an AC / DC conversion function.

[0035] In this embodiment, the multi-path fusion unit M111 includes a first unidirectional conduction switch corresponding to each of the power supply cables and a second unidirectional conduction switch corresponding to each of the power supply cables, and the first unidirectional conduction switch and the second unidirectional conduction switch are configured to be conductive when a positive voltage is applied to the positive terminal thereof and form a conduction current flowing from the positive terminal to the negative terminal thereof. The output end of the power supply module M110 includes a positive output end and a negative output end. The first end and the second end of the energy storage unit M112 are connected to the positive output end and the negative output end of the power supply module M110, respectively, to output electrical energy to the outside when the energy storage unit M112 is discharged.

[0036] In this embodiment, the multi-path fusion unit M111 includes a first unidirectional conduction switch corresponding to each of the power supply cables and a second unidirectional conduction switch corresponding to each of the power supply cables, and the first unidirectional conduction switch and the second unidirectional conduction switch are configured to be conductive when a positive voltage is applied to the positive terminal thereof and form a conduction current flowing from the positive terminal to the negative terminal thereof. The output end of the power supply module M110 includes a positive output end and a negative output end. The first end and the second end of the energy storage unit M112 are connected to the positive output end and the negative output end of the power supply module M110, respectively, to output electrical energy to the outside when the energy storage unit M112 is discharged.

[0037] The multi-path fusion unit further includes a third unidirectional conduction switch and a fourth unidirectional conduction switch, and the third unidirectional conduction switch and the fourth unidirectional conduction switch are configured to be conductive when a positive voltage is applied to the positive terminal thereof and form a conduction current flowing from the positive terminal to the negative terminal thereof. The positive terminal of the third unidirectional conduction switch is connected to the zero line, and the negative terminal is connected to the first end of the energy storage unit. The positive terminal of the fourth unidirectional conduction switch is connected to the second end of the energy storage unit, and the negative terminal is connected to the zero line.

[0038] For example, when the power supply cable 1 is powered on, there is an alternating voltage between the power supply cable 1 and the zero line, and the power supply cable 2 and the power supply cable 3 are not powered on. When the power supply cable 1 is in the positive half-axis of the alternating current, the first unidirectional conduction switch corresponding to the power supply cable 1 is conductive, and the fourth unidirectional conduction switch is conductive. The current flows from the first end of the energy storage unit to the energy storage unit through the corresponding first unidirectional conduction switch, and then flows to the zero line through the fourth unidirectional conduction switch. When the power supply cable 1 is in the negative half-axis of the alternating current, the second unidirectional conduction switch corresponding to the power supply cable 1 is conductive, and the third unidirectional conduction switch is conductive. The current flows from the zero line to the first end of the energy storage unit through the third unidirectional conduction switch, and then flows to the power supply cable 1 through the corresponding second unidirectional conduction switch. After the power supply cable 1 is powered off, there is a short power loss time, and the voltage on the power supply cables 1, 2 and 3 is 0. Therefore, the energy storage unit outputs electrical energy to the output end.

[0039] Figure 3This is a circuit diagram of the power module in this embodiment. Each of the unidirectional conduction switches is a diode, and the energy storage unit includes an energy storage capacitor C10. In other embodiments, the unidirectional conduction switches can also be implemented using one or more other components capable of unidirectional conduction. The energy storage unit may include two or more energy storage capacitors, etc. The capacity design of the energy storage capacitor is related to the power of the load (including traffic information collection equipment), and reasonable capacity parameters can be selected according to different power output requirements. Figure 3 As shown, P20 represents a traffic light, L1, L2, and L3 represent the power supply cables for the red, green, and yellow lights, respectively, and N represents the neutral wire. Diodes D5 and D8 are the first and second unidirectional switches for the red light's power supply cable, respectively; diodes D6 and D9 are the first and second unidirectional switches for the green light's power supply cable, respectively; diodes D7 and D10 are the first and second unidirectional switches for the yellow light's power supply cable, respectively; diode D11 is the third unidirectional switch; and diode D12 is the fourth unidirectional switch. Figure 3 In the diagram, A represents the positive terminal of the diode, and K represents the negative terminal.

[0040] Taking a red light as an example, when L1 is on the positive half-axis of the AC current, the current flows from L1 through the corresponding first unidirectional conductive switch D5 into the first terminal of the energy storage capacitor C10, then through the fourth unidirectional conduction switch D12, and flows to the neutral line N. At this time, the negative terminal of the first unidirectional conduction switch D5 is also connected to the positive output terminal V+, and the positive terminal of the fourth unidirectional conduction switch D12 is also connected to the negative output terminal V-, which can supply power to the external traffic information collection equipment. When the power supply cable 1 is on the negative half-axis of the AC current, the current flows from the neutral line N through the third unidirectional conduction switch D11, into the first terminal of the energy storage capacitor C10, then through the corresponding second unidirectional conduction switch D8 to the power supply cable 1. At this time, the positive terminal of the second unidirectional conduction switch D8 is also connected to the negative output terminal V-, and the negative terminal of the third unidirectional conduction switch D11 is also connected to the positive output terminal V+, which can supply power to the external traffic information collection equipment. After the power supply cable 1 is de-energized, there will be a brief period of power loss. During this time, the voltage on power supply cables 1, 2, and 3 will all be 0. Then, the energy storage capacitor C10 will output electrical energy to the positive output terminal V+ and the negative output terminal V-, which can supply power to the external traffic information collection equipment.

[0041] like Figure 4As shown, in this embodiment, the input unit of the carrier communication module M120 includes a control board, the modem M122 is arranged on the control board, and the control board is configured to communicate with the traffic information collection device M300, acquire traffic information collection data from the traffic information collection device M300, and input the traffic information collection data to the modem M122. The control board includes a communication interface and a power input interface. The communication interface may, for example, include a network port, an RS485 / RS232 serial port, and the like. The control board can directly transmit the traffic information collection data acquired from the traffic information collection device M300 to the modem M122, or can acquire the traffic information collection data from the traffic information collection device M300, perform some preprocessing, and then send the traffic information collection data to the modem M122. The modem M122 can use an existing modem chip, which is arranged on the control board and powered by the control board.

[0042] In this embodiment, the output unit of the carrier communication module M120 is also arranged on the control board, and the output end of the power supply module M110 is also connected to the power input interface of the control board to supply power to the carrier communication module M120. Therefore, the carrier communication module M120 does not need to be connected to other input power supply, and is more convenient and lower in use cost.

[0043] In this embodiment, the traffic signal lamp device M200 includes a plurality of power supply cables, such as the power supply cable 1, the power supply cable 2, and the power supply cable 3 corresponding to the red light, the green light, and the yellow light described above. The output unit includes a coupling device, which is connected to the plurality of power supply cables and couples the power line carrier signal into the plurality of power supply cables. Since only one power supply cable is generally powered at the same time, only one power supply cable is coupled successfully at the same time, and in this way, the traffic information collection data can be transmitted to an external demand device through the power supply cable of the traffic signal lamp device M200. Specifically, the coupling device can include a filter circuit and a mutual inductor. The power line carrier signal output by the modem is coupled into the plurality of power supply cables through the mutual inductor after passing through the filter circuit.

[0044] In the above embodiments, the traffic signal lamp device M200 is taken as an example to be described as including a red light, a yellow light, and a green light, but the application is not limited thereto. In other alternative embodiments, the number of signal lights in the traffic signal lamp device M200 can be less than 3 or more than 3, and the number of power supply cables can be correspondingly reduced or increased. Each power supply cable can not correspond to each signal light one by one, for example, one power supply cable can also supply power to two signal lights that need to be lit at the same time, and the like, which all belong to the protection scope of the application.

[0045] The above description is further detailed in combination with specific preferred embodiments of the present application, and cannot be deemed to limit the specific implementation of the present application to these descriptions. For those of ordinary skill in the art to which the present application belongs, several simple deductions or replacements can be made without departing from the concept of the present application, and all of them shall be deemed to fall within the protection scope of the present application.

Claims

1. A power supply communication device based on cooperation of traffic signal devices, characterized by, The application relates to a power supply module and a carrier wave communication module. The power supply module comprises an input end and an output end, the input end of the power supply module is connected to a plurality of power supply cables of a traffic signal lamp device, and the output end of the power supply module is connected to a power supply input end of a traffic information collection device; the traffic information collection device comprises a camera device and / or a radar device. The carrier wave communication module comprises an input unit, a modem and an output unit, the input unit is used for acquiring traffic information collection data from the traffic information collection device, the modem is used for modulating and demodulating the traffic information collection data to obtain a power line carrier wave signal to be sent, the output unit comprises coupling devices which are respectively connected to a plurality of power supply cables in the traffic signal lamp device and are used for coupling the power line carrier wave signal to be sent into the plurality of power supply cables; the output unit is also used for receiving a power line carrier wave signal from the power supply cables and sending the power line carrier wave signal to the modem, the power line carrier wave signal is converted into a digital signal by the modem and then transmitted to the traffic information collection device through the input unit.

2. The power supply communication device based on cooperation of traffic signal devices according to claim 1, characterized by, The power supply module comprises a multi-path fusion unit, the multi-path fusion unit is configured to fuse a plurality of input electric energies received by the input end from the plurality of power supply cables into one output electric energy.

3. The power line communication device based on cooperation of traffic signal devices according to claim 2, characterized by, The power supply module further comprises an energy storage unit, the energy storage unit is configured to store input electric energy of a power supply cable in a power-on state when at least one of the power supply cables in the traffic signal lamp device is in the power-on state and release electric energy when all the power supply cables in the traffic signal lamp device are not powered on.

4. The power supply communication device based on cooperation of traffic signal devices according to claim 3, characterized by, The multi-path fusion unit is configured to convert a plurality of alternating current input electric energies of the input end into direct current and fuse the direct current into one direct current output electric energy.

5. The power supply communication device based on traffic signal device cooperation according to claim 4, characterized by, The multi-path fusion unit comprises a first one-way conduction switch corresponding to each power supply cable and a second one-way conduction switch corresponding to each power supply cable. The output end of the power supply module comprises a positive output end and a negative output end, and the first end and the second end of the energy storage unit are respectively connected to the positive output end and the negative output end of the power supply module. The positive end of each first one-way conduction switch is connected to the corresponding power supply cable, and the negative end is connected to the first end of the energy storage unit; the positive end of each second one-way conduction switch is connected to the second end of the energy storage unit, and the negative end is connected to the corresponding power supply cable. The multi-path fusion unit further comprises a third one-way conduction switch and a fourth one-way conduction switch, the positive end of the third one-way conduction switch is connected to a zero line of the traffic signal lamp device, and the negative end is connected to the first end of the energy storage unit; the positive end of the fourth one-way conduction switch is connected to the second end of the energy storage unit, and the negative end is connected to the zero line.

6. The power line communication device based on traffic signal device cooperation according to claim 1, wherein, The input unit of the carrier wave communication module comprises a control board, the modem is arranged on the control board, and the control board is configured to communicate with the traffic information collection device, acquire traffic information collection data from the traffic information collection device and input the traffic information collection data into the modem.

7. The power line communication device based on cooperation of traffic signal devices according to claim 6, wherein The output unit of the carrier communication module is also arranged on the control board, and the output end of the power supply module is also connected to the power input interface of the control board to supply power to the carrier communication module.

8. The power line communication device based on traffic signal device cooperation according to claim 1, wherein, The coupling device comprises a filter circuit and a mutual inductor, and the power line carrier signal output by the modem is coupled to the power supply cable through the mutual inductor after passing through the filter circuit.

9. A power supply communication device, characterized by comprising: The power supply communication device comprises a traffic processing device and the power supply communication device according to any one of claims 1-8, and the traffic processing device comprises the traffic signal lamp device and / or the traffic information collection device.

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