KR20110018144A - Control system for road lamps using power line communication - Google Patents

Abstract

PURPOSE: A control system for a street lamp using a power line communication is provided to automatically restore power if a broken down street lamp returns to a normal state, thereby protecting an inner elements of the street lamp. CONSTITUTION: A power supply unit supplies power supplied from the external side to an operation power. The first signal detecting unit detects whether a street lamp(2) is broken down, disconnected, or has excess current and low current or not due to power supplied to the street lamp. The second signal detecting unit(4) detects whether the power is leaked or not. A microprocessor(5) controls power which is supplied to the street lamp by detecting result of the first signal detecting unit and the second detecting unit. A power control unit(7) enable AC power to be supplied to one side terminal of the street lamp by a control signal of a microprocessor. A operating and controlling unit(8) enable AC power to be selectively supplied to another terminal of the street lamp by an operating signal of the microprocessor.

Description

Street light management system using power line communication {Control system for road lamps using power line communication}

The present invention relates to a streetlight management system using power line communication, and more specifically, streetlight lamp installed in the tunnel or road causing a failure or abnormality such as short-circuit, overcurrent or short circuit due to the failure of the line streetlight When the power supply to the ballast of the lamp is cut off from the control device and restored to normal state, it is automatically restored. In case of a failure, the street light control device transmits the power to the nearby control box through the power line for quick processing. The present invention relates to a streetlight management system using power line communication to more stably monitor streetlights.

In general, ballasts for discharge lamps (eg, sodium lamp ballasts, mercury lamp ballasts, metal halite ballasts, etc.) installed in a fireside are provided with a ballast case formed integrally with a ballast cover, a ballast for a high pressure sodium lamp installed inside the ballast case, An igniter for determining whether there is a failure and limiting output so as to supply an appropriate pulse voltage to the ballast, a capacitor having a discharge resistor built in the lower part of the igniter, and a coil wound to obtain an induced voltage when a high-voltage discharge lamp is turned on. The winding-type transformer composed of a plurality of stacked cores has a structure in which the molded body is integrally formed.

Here, since the high-pressure discharge lamp illuminator case is formed integrally with the ballast cover, the manufacturing process of the cover and the case is complicated, and there is a problem that replacement of the illuminator is very difficult and cumbersome.

Therefore, Patent Application No. 20-2000-0036172 dated December 22, 2000 (light circuit failure information detection device using a power line) was proposed,

This includes a lamp circuit, a terminal apparatus for detecting fault information of the lamp circuit, and a central apparatus for receiving and collecting fault information and transmitting the fault information to a remotely located host.

The central unit receives a predetermined control signal from the host and processes it.

Although the state information and control signals are transmitted between the central unit and the host through a power line for supplying power to the failure information detecting device of the lamp, at a time when there is no light load on the power circuit of the lamp circuit, that is, when the lamp does not turn on, Since a power line to which an AC voltage is not applied is used as a communication line to transmit and receive information between the host and the central device, there is a problem in that it cannot be recognized at all at night.

In addition, Patent Application No. 10-2007-0021269 dated March 05, 2007 (Street lamp failure detection device and method) was proposed.

This means that if an abnormality occurs in a street lamp composed of a lamp and a ballast, the power supply to the street lamp is automatically cut off, and the failure state can be quickly transmitted to the situation room at a remote location in real time.

The apparatus includes: a detector for measuring a voltage applied to a commercial power supply for supplying power, a current consumption flowing in a street lamp stabilizer and a lamp, and a leakage current leaking to the outside;

A processor configured to calculate an active power consumed by the lamp from the voltage, the current consumption, and the leakage current measured by the detection unit, and determine whether the lamp and the ballast are broken by determining an overcurrent and a short circuit;

A blocking unit which cuts off the power supply to the ballast by receiving a control command from the processor when the processor determines that the lamp or ballast has failed;

By including a detection unit of the detection unit and a communication unit for transmitting the calculation, determination and control details of the processor in real time to the situation room, it is possible to quickly identify the risk situation of the street lamp and to take action to prevent the spread of accidents and failures. If the danger is detected, the streetlight is not supplied with power so that the risk of fire accidents due to short circuits can be prevented.

However, the above-described apparatus and method for detecting a failure of a street lamp recognizes an overcurrent and a short circuit that cause a failure of the streetlight, but cuts it off, but fails to accurately recognize all failures such as a failure of the line or a failure of the streetlight. Of course, since a separate signal line or wireless transmission is used for signals due to these failures, there is a problem in that additional cost for signal transmission or efficient management is not achieved.

Accordingly, the present invention is to solve the conventional problems as described above, the street light lamp installed in the tunnel or the road is a failure lamp or a street light to recognize whether the abnormal state such as short circuit, over current or short circuit due to the abnormal track When the power supply to the ballast of the lamp is cut off from the control device and restored to normal state, it is automatically restored. In case of a failure, the street light control device transmits the power to the nearby control box through the power line for quick processing. It is an object of the present invention to provide a street lamp management system using power line communication to perform a more stable monitoring of the street lamp to be made.

Street light management system using the power line communication of the present invention for achieving the above object,

When the street lamp control device detects whether abnormal condition such as short, over current or short circuit occurs while the street lamp is installed in the tunnel or on the road during the failure or power supply, it is recognized by the current transformer and the video current transformer.

When the streetlight controller recognizes an abnormal condition, the power supplied to the ballast of the lamp is cut off through the relay and automatically restored when the lamp is returned to the normal state.

When the street lamp control device recognizes a failure, the street lamp control device which receives the failure data according to the type of failure along with the address corresponding to its own address through the power line to the next street lamp control device and receives it through the receiver. Is transmitted to the control box installed in the element by the method of transmitting to the next street lamp control device through the transmitter,

By visually confirming through the board of the control box at the same time by combining the PC with the input and output terminals to check the failure of the street light is made quickly characterized in that it is configured to perform more stable management of the street light.

According to the street lamp management system using the power line communication of the present invention as described above, the street lamp lamp installed in the tunnel or the road causes a failure or abnormality such as short circuit, overcurrent or short circuit while supplying power. When it is detected by the video current transformer and the video current transformer, the power supplied to the ballast of the lamp is cut off through the relay, and when it is restored to the normal state, it is automatically restored to protect the internal elements of the street lamp.

When the streetlight controller recognizes a failure, the failure data according to the type of failure along with the address is transmitted to the next streetlight controller through the power line, received through the receiver, and then transmitted to the next streetlight controller through the transmitter. By transmitting to the control box by the method and visually checking through the board, and by connecting the PC to the input and output terminals to check the failure of the street lamp can be processed quickly, there is an effect that can manage the street lamp more stably. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows a schematic configuration of a streetlight management system using power line communication according to the present invention.

When the street lamp control device A recognizes a failure of the street lamp and the line and recognizes a failure due to a lamp failure or an abnormality in the line, the fault data is transmitted to the control box through the transmission circuit B. and,

Receive the failure data transmitted from the streetlight control device (A) of the front end through the receiving circuit (C) to be transmitted to the next streetlight control device (A) or the control box (D),

The street lamp control device (A) described above,

When the AC 220V power supplied from the outside is supplied with a power supply unit 1 for stably supplying the operating power,

A first signal detector (3) for detecting whether the street lamp (2) fails or is disconnected, overcurrent, or low current with respect to the AC 220V power supplied to the street lamp (2);

A second signal detector (4) for detecting whether an electric current in a line flows to the earth with respect to the power supply;

Whether the AC 220V power supplied to the street lamp 2 through the power supply unit 1 is low voltage is determined by the detection results of the first and second signal detectors 3 and 4 at the same time. Microprocessor for controlling the internal operation while controlling the power supplied to the street lamp (2) by determining whether the street lamp (2) is broken, disconnection, overcurrent, low current or short circuit, and whether or not to return to normal 5) with,

LED driver 6 for informing each of the statuses of the normal state, failure, disconnection, overcurrent, low current or short circuit under the control of the microprocessor 5 through the light emitting diodes;

A power control unit 7 for supplying AC power to one terminal of the street lamp 2 by a control signal of the microprocessor 5;

A drive control unit 8 for selectively supplying AC power to the other terminal of the street lamp 2 by a drive signal transmitted from the microprocessor 5;

While being controlled by the microprocessor 5, the fault data according to the type of fault is output as a digital signal together with the address corresponding to its own address, or the address and fault data of the digital signal transmitted to the microprocessor 5 are transmitted. A power line communication modem 9 for transmitting to the next street lamp control device A;

The transmission circuit (B) described above is

A bias unit 10 for adjusting a bias voltage with respect to a digital signal of fault data according to the type of fault together with an address corresponding to its own address transmitted through the power line communication modem 9;

A differential amplifier 11 for wideband amplifying the digital signal via the bias unit 10;

An oscillator 12 for modulating a wideband amplified digital signal by the differential amplifier 11;

A transformer section 13 for outputting the digital signal modulated by the oscillator section 12 to the AC power line 100 while performing breakdown voltage processing;

The receiving circuit C is

A transformer unit 20 which induces the digital signal by LC tuning frequency to the digital signal of the fault data according to the address and the type of the fault corresponding to the address received through the AC power line 100;

An amplifier 21 for amplifying the digital signal induced by the transformer 20 to correct reception sensitivity;

Amplifying the output of the digital signal amplified by the amplifying unit (21) and configured to output amplifying units (22) for transmitting to the microprocessor (5) through the power line communication modem (9);

The control box (D) mentioned above is

When the transmission circuit B receives the address and fault data of the digital signal transmitted through the AC power line 100 through the transformer unit 30 and the amplifier unit 31, the internal operation is performed while checking the address of the digital signal. A controller 32 for controlling,

A memory 33 for storing a digital signal of an address and fault data transmitted under the control of the controller 32;

When the administrator turns on the confirmation key of the key input unit 31, the controller receives the digital signal stored in the memory 30 under the control of the controller 33 that recognizes the key input unit 31. A display driver 34 for displaying information according to characters;

The data output unit 36 allows the administrator to read the fault data stored in the memory 30 while coupling the terminal 41 of the portable PC 40 such as a notebook to the input / output terminal 37 of the control box D. ) Is composed of.

Figure 2 shows a detailed configuration of the street lamp control device (A) according to the present invention,

When the AC 220V power supplied from the outside is supplied through the fuse (F), the power supply unit (1) for stably supplying the operating power via the transformer (T1), bridge diode (BD1) and constant voltage IC (IC1), and

For the AC 220V power supplied to the street lamp 2, the street lamp 2 fails through the two current transformers CT1 and CT2 and the bridge diode BD2 and BD3, A first signal detector 3 for detecting the presence of low current,

A second signal detector 4 which detects whether or not an electric current of a line flows to earth through one image current transformer ZCT and a bridge diode BD4 with respect to the power supply;

It is determined whether the AC 220V power supplied to the street lamp 2 through the power supply 1 is low voltage and determined by the detection result of the first and second signal detectors 3 and 4. Microprocessor for controlling the internal operation while controlling the power supplied to the street lamp (2) by determining whether the street lamp (2) is broken, disconnection, overcurrent, low current or short circuit, and whether or not to return to normal 5) with,

Under the control of the microprocessor 5, whether the failure is caused by a steady state, a fault, a disconnection, an overcurrent, a low current, or a short circuit is performed through the light emitting diodes L1, L2, L3, L4, and L5, respectively. Informing the light emitting diode driver 6,

While the control signal of the microprocessor 5 turns on / off the triac TC, which is a switching element, via the photocoupler PC1 and the die solution DA, the power through the transformer T2 is supplied to the street lamp lamp 2. A power supply control unit 7 for supplying to one terminal of

The driving signal transmitted from the microprocessor 5 selectively drives the relay RY via the transistor TR, which is a switching element, and is supplied to the other terminal of the street lamp 2 through a relay contact. A drive control unit 8 for selectively limiting the power supplied to the unit 2;

Under the control of the microprocessor 5, along with the address corresponding to its own address, the fault data according to the type of fault is output as a digital signal or the information of the digital signal transmitted is transmitted to the microprocessor 5 while the next street light. It is composed of the power line communication modem (9) to transmit to the control device (A).

When the street lamp management system using the power line communication of the present invention configured as described above recognizes the failure of the lamp or the failure of the line while controlling the lighting while the street lamp control device A recognizes the failure of the street lamp and the line. The fault data is transmitted to the control box D through the transmitting circuit B, and the fault data transmitted from the street light controller A immediately before is received through the receiving circuit C to receive the next street light controller ( A) or to be delivered to the control box (D),

Operation via the transformer T1, the bridge diode BD1, and the constant voltage IC IC1 in the power supply unit 1 of the street light control device A, which receives AC 220V power supplied from the outside through the fuse F. Supply power stably.

The microprocessor 5 checks whether or not a low voltage is applied to the AC 220V power supplied from the outside to the street lamp 2 through the power supply 1.

At the same time, the street lamp lamp 2 causes a failure in the microprocessor 5 which recognizes the current value through the first signal detector 3 consisting of two current transformers CT1, CT2, and bridge diodes BD2, BD3. Or detect disconnection, overcurrent and undercurrent.

In addition, the microprocessor (5) detects whether the current of the line flows to the ground through the second signal detector (4) consisting of one image current transformer (ZCT) and bridge diode (BD4) for the power supply. .

The microprocessor 5 of the street lamp control device A which receives the detection result of the first and second signal detectors 3 and 4 receives a breakdown, disconnection, overcurrent, low current, or short circuit of the lamp lamp 2. Determine the failure state and whether to return to normal to control the operation of the internal power while controlling the power supplied to the street lamp (2).

In the LED driver 6 under the control of the microprocessor 5, the LEDs L1, L2, L3, L4 determine whether a failure occurs due to a steady state, failure, disconnection, overcurrent, low current, or short circuit. By selectively lighting (L5) it indicates the different status for each operation.

In the power control unit 7 to which the control signal of the microprocessor 5 is transmitted, the triac TC, which is a switching element, is turned on / off at a large voltage while the die liquid DA is turned on / off via the photocoupler PC1. AC 220V power through the transformer (T2) is selectively supplied to one terminal of the street lamp (2) to enable a stable lighting of the street lamp (2).

The other side of the street lamp 2 through the relay contact while selectively driving the relay RY through the transistor TR which is a switching element in the drive controller 8 receiving the drive signal from the microprocessor 5. AC 220V power is supplied to the terminal to selectively limit the power supplied to the street lamp (2).

The power line communication modem 11 under the control of the microprocessor 5 outputs the fault data according to the type of the fault together with the address corresponding to its own address as a digital signal or is transmitted from the streetlight controller A immediately before. Information of the digital signal is transmitted to the microprocessor 6 so as to be transmitted to the control box D while continuing to transmit to the next street lamp control device A. FIG.

The digital signal transmitted through the power line communication modem 11 adjusts the bias voltage in the bias unit 12 of the transmission circuit B.

Broadband amplification is performed by the differential amplifier 13 receiving the digital signal via the bias unit 12.

The oscillation IC 14 receiving the wideband amplified digital signal by the differential amplifier 13 modulates the digital signal.

The transformer 15 receives the digital signal modulated by the oscillation IC 14 and outputs the voltage to the AC power line 100 while performing a breakdown voltage processing.

On the other hand, the digital signal received through the AC power line 100 is induced by the LC tuning frequency in the transformer unit 21 of the receiving circuit (C).

The amplifier 22 receives the digital signal induced by the transformer 21 to amplify the receiver for correction of reception sensitivity.

The output amplifier 23 receives the digital signal amplified by the amplifier 22 and amplifies the output and transmits the digital signal from the outside by transmitting the digital signal to the microprocessor 5 through the power line communication modem 10. Make it possible to receive over the power line.

And, along with the address corresponding to the address transmitted through the AC power line 100 of the transmitting circuit (B), the digital signal of the fault data according to the type of fault is received through the transformer unit 30 and the amplifier unit 31. The controller 32 of the control box D controls the internal operation while checking the address of the digital signal and the fault data of the digital signal.

The digital signal of the address and the fault data is stored in the memory 33 under the control of the controller 32.

In this state, when the administrator turns on the confirmation key of the key input unit 31, the display unit 35 receives the digital signal stored in the memory 30 under the control of the controller 33 that recognizes the key input unit 31. ), The information of the street lamp number and the type of failure is displayed in letters.

When the manager combines the terminal 41 of the portable PC 40 such as a notebook with the input / output terminal 37 of the control box D, the controller 32 recognizes the data output unit 36 and controls the data output unit 36. While outputting the fault data stored in the memory 30 to be read from the outside.

Although the preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments without departing from the spirit of the present invention as claimed in the claims. Various modifications can be made by those skilled in the art, and such modifications are intended to fall within the scope of the appended claims.

1 is a block diagram showing the overall configuration of the present invention.

Figure 2 is a circuit diagram showing a detailed configuration of the streetlight control device of the present invention.

Explanation of symbols on the main parts of the drawings

A: Street light controller B: Transmission circuit

C: Receive Circuit D: Control Box

3: first signal detector 4: second signal detector

5 microprocessor 7 power control unit

8: drive control unit 9: power line communication modem

10: bias portion 11: differential amplifier

12: oscillation part 13, 20: trans part

21: amplifier 22: output amplifier

32: controller 33: memory

34: display driver 36: data output unit

Claims (2)

When the street lamp control device A recognizes a failure of the street lamp and the line and recognizes a failure due to a lamp failure or an abnormality in the line, the fault data is transmitted to the control box through the transmission circuit B. and, Receive the failure data transmitted from the streetlight control device (A) of the front end through the receiving circuit (C) to be transmitted to the next streetlight control device (A) or the control box (D), The street lamp control device (A) described above, When the AC 220V power supplied from the outside is supplied with a power supply unit 1 for stably supplying the operating power, A first signal detector (3) for detecting whether the street lamp (2) fails or is disconnected, overcurrent, or low current with respect to the AC 220V power supplied to the street lamp (2); A second signal detector (4) for detecting whether an electric current in a line flows to the earth with respect to the power supply; Determination of the failure status and disconnection of the street lamp (2) determined by the detection results of the first and second signal detectors 3 and 4 and the return to normal A microprocessor (5) for controlling an operation inside while controlling power supplied to the street lamp (2); LED driver 6 for indicating whether the failure is caused by a steady state, failure, disconnection, overcurrent, low current or short circuit under the control of the microprocessor 5, and A power control unit 7 for supplying AC power to one terminal of the street lamp 2 by a control signal of the microprocessor 5; A drive control unit 8 for selectively supplying AC power to the other terminal of the street lamp 2 by a drive signal transmitted from the microprocessor 5; While being controlled by the microprocessor 5, the fault data according to the type of fault is output as a digital signal together with the address corresponding to its own address, or the address and fault data of the digital signal transmitted to the microprocessor 5 are transmitted. A power line communication modem 9 for transmitting to the next street lamp control device A; The transmission circuit (B) described above is A bias unit 10 for adjusting a bias voltage with respect to a digital signal of fault data according to the type of fault together with an address corresponding to its own address transmitted through the power line communication modem 9; A differential amplifier 11 for wideband amplifying the digital signal via the bias unit 10; An oscillator 12 for modulating a wideband amplified digital signal by the differential amplifier 11; A transformer section 13 for outputting the digital signal modulated by the oscillator section 12 to the AC power line 100 while performing breakdown voltage processing; The receiving circuit C is A transformer unit 20 which induces the digital signal by LC tuning frequency to the digital signal of the fault data according to the address and the type of the fault corresponding to the address received through the AC power line 100; An amplifier 21 for amplifying the digital signal induced by the transformer 20 to correct reception sensitivity; Amplified digital signal amplified by the amplification unit (21) and configured to output amplifiers (22) for transmitting to the microprocessor (5) through the power line communication modem (9); The control box (D) mentioned above is A controller 32 for controlling an internal operation while receiving an address and fault data of a digital signal transmitted from the transmission circuit B through the AC power line 100 through the transformer unit 30 and the amplifier unit 31; , A memory 33 for storing a digital signal of an address and fault data transmitted under the control of the controller 32; When the confirmation key of the key input unit 31 is turned on, the digital signal stored in the memory 30 is received by the control of the controller 33 that recognizes the information, according to the number of the street light and the type of the failure on the display unit 35. A display driver 34 for displaying a letter; Combining the terminal 41 of the portable PC 40 to the input and output terminal 37 of the control box (D) while the data output unit 36 to read the fault data stored in the memory 30 Street light management system using power line communication. The method according to claim 1, The street lamp control device (A) described above, When the AC 220V power supplied from the outside is supplied through the fuse (F), the power supply unit (1) for stably supplying the operating power via the transformer (T1), bridge diode (BD1) and constant voltage IC (IC1), and For the AC 220V power supplied to the street lamp 2, the street lamp 2 fails through the two current transformers CT1 and CT2 and the bridge diode BD2 and BD3, A first signal detector 3 for detecting the presence of low current, A second signal detector 4 which detects whether or not an electric current of a line flows to earth through one image current transformer ZCT and a bridge diode BD4 with respect to the power supply; It is determined whether the AC 220V power supplied to the street lamp 2 through the power supply 1 is low voltage and determined by the detection result of the first and second signal detectors 3 and 4. Microprocessor for controlling the internal operation while controlling the power supplied to the street lamp (2) by determining whether the street lamp (2) is broken, disconnection, overcurrent, low current or short circuit, and whether or not to return to normal 5) with, Under the control of the microprocessor 5, each of the light emitting diodes L1, L2, L3, L4, and L5 indicates whether there is a failure due to a steady state, failure, disconnection, overcurrent, low current, or short circuit. Is the light emitting diode driver 6, The control signal of the microprocessor 5 passes through the photocoupler PC1 and the die solution DA to turn on / off the triac TC, which is a switching element, and the power through the transformer T2 is supplied to the street lamp lamp. A power supply control unit 7 for supplying to one terminal of 2), The driving signal transmitted from the microprocessor 5 selectively drives the relay RY via the transistor TR, which is a switching element, and is supplied to the other terminal of the street lamp 2 through a relay contact. A drive control unit 8 for selectively limiting the power supplied to the unit 2; Under the control of the microprocessor 5, along with the address corresponding to its own address, the fault data according to the type of fault is output as a digital signal or the information of the digital signal transmitted is transmitted to the microprocessor 5 while the next street light. Street light management system using power line communication, characterized in that consisting of power line communication modem (9) to be delivered to the control unit (A).

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