KR20020028573A - Remote check/control system for street-lamp and the method - Google Patents

Abstract

PURPOSE: A street lamp remote monitoring/controlling system is provided to minimize an influence due to supply voltage variation by digitally detecting an effective power and a supply voltage and calculating load variation for each branch circuit, and accurately sense failure by filtering a reverse current due to lamp failure. CONSTITUTION: A street lamp remote monitoring/controlling system comprises a street lamp controller coupled to a control computer with a bidirectional wireless communication network for remotely monitoring/controlling many street lamps. The street lamp controller includes a wireless transceivers(31) and a communication modem(34) for communicating with the control computer, a relay driving circuit(44) and a relay(43) for controlling on/off of the street lamps, a digital detector(46) for detecting variation of the effective power and the supply voltage of each branch circuit, a system monitoring and reset circuit(41), a power measurement storage(32), a failure state displaying LEDs(33), a static voltage supply(35), and a central controlling micro-processor(45).

Description

Remote check / control system for street-lamp and the method

The present invention relates to a system for remotely monitoring and controlling a street light, and more particularly, to digitally control data on power consumption and supply voltage for each branch circuit as well as remotely controlling a street lamp's point and light by bidirectional wireless communication. The present invention relates to a street light remote monitoring / control system and method for remotely collecting and automatically determining a failure state according to a load variation.

In general, a number of street lights are installed along the roadside and in parks, helping citizens to enjoy a smooth night life. However, repairing and controlling faults by checking the condition of numerous streetlights individually can result in a lot of time, labor and economic waste.

Accordingly, various street light remote control devices and control systems have been developed and used, ranging from automatic control and remote control systems using illuminance sensors or timers to street light remote control systems using wired or wireless communication networks. As it does not possess, it does not contribute to the convenience of citizens through quick breakdown measures.

Meanwhile, FIG. 1 is a view illustrating a conventional power consumption detection method in an embodiment of a remote street light monitoring method. As shown in FIG. 1, an infrared sensor 12 for detecting power consumption is conventionally described. Installed on the external top of the integrated power meter 10 of the distribution box to count the number of revolutions of the rotating plate 14 according to the amount of power consumption, the power consumption for each distribution box is detected, and through this, the lamp lights, the number of failure lamps, and the overload condition are detected. Watch.

In addition, a simple method using only a CT sensor is disclosed as a method of detecting a state of a street lamp in the related art, and the CT sensor is installed in a wiring part of each circuit of a distribution box and detects and compares changes in current consumption of each circuit. It is said to monitor the status and failure status.

However, in general, the supply voltage is changed depending on the weather, failure of the power line, or load, etc. In the case of the analog power detection or the current change detection method using a conventional CT sensor, the power consumption and Since the detection of the current proceeds without considering the change in the power supply, there is a problem that an error occurs in determining a fault condition.

In addition, discharge lamps such as high pressure sodium lamps and metal lamps, which are used as street lamps, cause a current backflow phenomenon due to reactive current when the lamp breaks down. have.

The present invention has been made to solve the above problems, the object of the present invention is to digitally detect the effective power supply and supply voltage, calculate the amount of change of the load for each branch circuit, and then supply by determining the failure number It is to provide a street lamp remote monitoring / control system that can accurately detect the fault condition by minimizing the influence of power fluctuations and filtering the current flow back during lamp failure.

Another object of the present invention is to provide a remote street light monitoring / control method for smoothing the control of the street light and coping with the failure situation using the system described above.

1 is a configuration diagram of an integrated power meter for reading power consumption in a conventional analog system.

Figure 2 is a block diagram showing a schematic configuration of a street light remote monitoring / control system according to the present invention.

Figure 3 is a block diagram showing the internal configuration of a street lamp controller according to the present invention.

4 is a circuit diagram illustrating a connection state of a street lamp controller and a power line according to the present invention;

5 is a flowchart illustrating a remote monitoring / control method of a street lamp according to the present invention;

<Description of Symbols for Main Parts of Drawings>

10. Integrated power meter 12. Infrared sensor

20. Control computer 23. monitor

26. System DB30. Street light controller

31. Wireless transceiver 32. Power meter value storage means

36.CT sensor 37. Effective power detector

38. Voltage sensor 39. Supply voltage detector

40. The street light 41. System monitoring and reset circuit

42. Magnetic S / W44. Relay drive circuit

45.Microprocessor 46. Digital detection means

In order to achieve the above object, the street lamp remote monitoring / control system according to the present invention remotely controls the lighting of a plurality of street lamps through the following street lamp controller, and detects signals for effective power and supply voltage for each branch circuit from the street lamp controller below. The control computer calculates the load variation of the branch circuit and estimates and manages the fault condition of the street lamp after receiving the signal, and controls the branch circuit on / off according to the control signal of the control computer, and the effective power for each branch circuit. And a street light controller which detects a supply voltage variation as a filtered digital signal and sends the same to the control computer.

In addition, for another object of the present invention, the remote street light monitoring / control method according to the present invention is a method for remote monitoring / controlling the street light while the control computer and the street lamp controller is interconnected through a two-way wireless data communication network, the control computer As the remote control of the plurality of street lamps for each branch circuit through the street lamp controller, the street lamp controller controls the branch circuit on / off and determines whether the lamp is normally operated and transmits the information to the control computer. Making; The street light controller detects the effective power and supply voltage of each branch circuit as a filtered digital signal at regular intervals, compares it with a setting value for the normal operation of the branch circuit, and detects the detected information when the allowable variation range is exceeded. Sending to a control computer; The control computer calculates a load amount through the detection information upon receiving the detection information, and when the load amount rises above the setting reference value of the branch circuit, estimates the overload state, and if the value falls below the setting reference value, the breakdown of the branch circuit occurs. Automatically determining and managing the number of street lights; Wirelessly transmitting the determined failure details to a portable terminal of a maintenance company to instruct failure recovery; And controlling the faulty distribution box by receiving the control computer as the maintenance worker sends out a point-off control signal for the faulty distribution box using a portable terminal.

Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating a schematic configuration of a remote street light monitoring / control system according to the present invention.

As shown in FIG. 2, the present invention relates to a control computer 20 having a monitor 23 and a system DB 26, and a plurality of control computers 20 connected to each other via a two-way wireless data communication network. A plurality of street lamp controllers 30 for remotely monitoring / controlling the street lamps 40, a street lamp mechanism 40 connected to each of the branch circuits to the street lamp controller 30, and an instruction of the control computer 20. By the repair company's portable terminal 60 for repairing the failure of the street lamp, etc. are made in connection with each other.

The two-way wireless data communication network is for transmitting the control command signal from the control computer 20 and the failure detection signal from the street lamp controller 30, etc., and the existing communication network system 50 and a plurality of facilities installed in a predetermined area. It consists of a plurality of communication network base station 55 in charge of wireless data transmission and reception with the three streetlight controller (30).

The control computer 20 outputs the on / off control command of the street lamps for each circuit to the street lamp controller 30 to remotely control the lighting of the street lamps, and to effect each branch circuit from the street lamp controller 30. Receiving information such as the amount of power and the supply voltage to determine the lighting state of the street lamp, the number of failure lamps and the overload state, and the information about each street lamp (or distribution box) to the database DB 26 to manage. In addition, a message on the monitor 23 is displayed on the monitor 23 so that the administrator can easily determine.

In addition, when it is determined that the streetlight distribution box power outage and circuit-specific lighting or individual lighting (failure), the control computer 20 uses a wireless data communication network to send a message such as the location of the failure, failure status, etc. Or by sending to the portable terminal 60 of the staff in charge) it is possible to quickly troubleshoot.

In particular, the control computer 20 receives information about the effective power amount and supply voltage variation of each circuit from the streetlight controller 30 and automatically calculates the current load for each circuit to detect the failure and overload of the streetlight. Estimate. At this time, the load amount for each branch circuit is calculated from the received actual power value and the supply voltage value by the formula of R = V ² / P.

In addition, the street light controller 30 is installed in the distribution box having a wireless transmission and reception means (31, 34), a circuit control means and a digital detection means 46, etc., the street light in accordance with the control command of the control computer 20 Control the lights on in bulk or in part, and check the lights on, off, power supply and supply voltage for each distribution box circuit, and if it is estimated to be abnormal, send the information about this to the control computer 20 through the base station 55. Send it out. In addition, according to the request of the control computer 20, the integrated power consumption of the distribution box is remotely read and transmitted.

On the other hand, Figure 3 is a block diagram showing the internal configuration of the street lamp controller 30 according to the present invention, as shown in Figure 3, the street lamp controller 30 receives a control signal from the control computer 20 And a plurality of wireless transceivers 31 and communication modems 34 for transmitting digital detection signals to the control computer 20, and magnetic S / Ws 42 of the branch circuits according to the control signals. Digital detecting means for detecting the relay driving circuit 44 and the relay 43 for controlling the lighting of the street lamp and the amount of change of the effective power and supply voltage of each branch circuit and providing them to the microprocessor 45 as a digital signal ( 46) and a system monitoring and reset circuit 41 for monitoring the state of the street lamp controller 30 and resetting the setting environment for the number of street lamps, load amount, effective power amount, supply voltage, etc. for each branch circuit; Effectiveness Power measurement value storage means 32 for accumulating and storing the amount of power, a plurality of status display LED 33 for displaying a fault condition, the constant voltage supply unit 35, and the means built in the street lamp controller 30 It comprises a microprocessor 45 for controlling and centralizing the overall operation required for fault detection and control of the street light.

Further, the microprocessor 45 compares the measured value detected by the digital detecting means 46 every predetermined time (about 10 minutes) with the setting value of the system reset circuit 41, and compares the allowable variation range. If exceeded, the measured value information is transmitted to the control computer 20 by controlling the wireless transceiver 31 and the communication modem 34, and the power measurement value is stored according to the control command signal of the control computer 20. The integrated power amount information of the means 32 is sent out, and the relay drive circuit 44 is controlled to control the street lamps of the respective branch circuits on and off.

In addition, the digital detection means 46 detects an effective amount of power by using a circuit current value from the CT sensor 36 provided for each branch circuit and a supply voltage from the voltage sensor 38 of the power input terminal. It consists of an effective power detection unit 37 for outputting a power supply, and a supply voltage detection unit 39 for converting the supply voltage measured from the voltage sensor 38 into appropriate digital information as necessary and outputting the digital power.

In addition, the effective power detector 37 is to automatically calculate the power consumption value of each branch circuit as a digital signal and provide it to the microprocessor 45, and the analog value detected from the CT sensor 36 is A / After converting into a digital signal through the D conversion circuit, the high pass filter circuit passes only the high frequency value, converts the analog signal detected by the voltage sensor 38 into a digital signal, and then converts the digital signal to the converted current and voltage. The signal is multiplied by a multiplier circuit to produce a digital signal for effective power, which is then filtered by a low pass filter.

In addition, the supply voltage detector 39 converts the analog signal detected from the voltage sensor 38 into a digital signal by an A / D conversion circuit and then performs high pass filtering to remove the low frequency value, and the voltage sensor 38 After converting the analog signal from) into digital signal by another A / D conversion circuit, multiply these digital voltage signals by multiplier circuit to calculate voltage square value (V ² ) and filter it with low pass filter. The digital signal for the supply voltage is output and provided to the microprocessor 45.

As described above, the present invention determines the failure state or the number of lamps through the load resistance of the street lamp (or branch circuit) having a constant value regardless of the fluctuation of the current and voltage of the power supply, so It is possible to effectively prevent the error of detection determination due to the current backflow phenomenon.

In addition, in detecting the effective power (P) and the square value of the voltage (V ² ) for each branch circuit, the current is reversed from the detected information by converting the detected analog signal into a digital signal and then performing an appropriate filtering process. This will remove the value by.

4 is a circuit diagram illustrating a connection state of the street light controller 30 and the power line by way of example. As shown in FIG. 4, the integrated power meter 47 and the primary car breaker 48 are provided at the power input unit of the distribution box. In the branch circuit of the street lamp is installed and the magnetic S / W 42 and the secondary car breaker 49 is provided for each branch circuit, each magnetic S / W (42) to control the lighting of the street lamps of each branch circuit. ) Is connected to the relay drive circuit 44, the CT sensor 36 is installed on the output side of the secondary automobile circuit breaker 49 of each branch circuit to detect current flowing through each circuit, and the primary vehicle of the power input unit. The voltage sensor 38 is provided on the output side of the short-term 48 to detect the voltage of the power supply.

5 is a flowchart illustrating an embodiment of a remote monitoring / control process of a street lamp using a load variation amount according to the system described above.

First, when the control computer 20 installed in the central control room is executed automatically or manually to control the point, off control command for the street lamp branch circuit of a specific area, the control command signal is transmitted to the communication base station 55 of the area. It is transmitted to the corresponding street lamp controller 30. (S51)

Accordingly, the street light controller 30 analyzes the control command signal by the microprocessor 45 and then controls the relay drive circuit 44 to turn on or off the branch circuits so that the street lamps can be switched on or off by branch circuit. Done. In addition, the street lamp controller 30 determines whether the street lamp is turned on or off by turning on or off each branch circuit through the generation of the effective power from the effective power detector 37 for a predetermined period (seconds). Then, the control computer 20 transmits it to the control computer 20. (S52) Accordingly, the control computer 20 displays the point and the lighting of the street lamp on the monitor 23.

In addition, when the control command signal includes a power consumption detection command, the effective power amount accumulated in the power measurement value storage unit 32 is read and wirelessly transmitted to the control computer 20.

When the street lamp is normally turned on, the street lamp controller 30 automatically detects an effective amount of power and a supply voltage of each branch circuit at a predetermined cycle (about 10 minutes) (S53).

In addition, the street light controller compares the detected value with a set value (effective power amount) for normal operation (S54), and determines whether the deviation is within an allowable range (S55).

At this time, when the deviation is within the allowable range, the street light controller 30 continuously monitors and monitors the amount of power and the voltage of the branch circuit at a predetermined cycle, and when the deviation is exceeded, the information about the detected effective power amount and the voltage. This is wirelessly transmitted to the control computer 20 through the base station 55. (S56)

The control computer 20 receives this and calculates the abnormal load amount of the branch circuit using the load calculation formula (R = V ² / P). (S57) In addition, the normal load amount of the branch circuit having a failure ( By the number of street lamps connected to the branch circuit) and the abnormal load amount is mutually compared to determine the range of the load variation (S58).

At this time, when the abnormal load amount is larger than the normal load amount, the control computer 20 estimates the overload state and displays a message for this on the monitor 23 (S59).

In addition, when the abnormal load amount is less than the normal load amount, the control computer 20 can easily determine the number of fault street lights in comparison with the load amount of one street light, and displays the information on the monitor 23. S60)

In addition, according to the determination result, the lighting and failure status of the street lamps by day and period, and the maintenance work instructions corresponding thereto are automatically output.

On the other hand, the control computer 20 is to transmit a message about the failure location, the failure details, etc. to the portable terminal 60 of the maintenance company (or staff in charge) according to the estimated failure or overload condition of the street light as described above do. In addition, a message such as occurrence of a predetermined number of failure lights (night), a power failure (day or night), or abnormal lighting (day) can be sent based on the failure details. (S61)

In addition, as the control computer 20 transmits a failure estimation signal, the street light controller 30 lights the corresponding status display LED 33 to facilitate troubleshooting.

In addition, during the normal recovery operation, the maintenance company (or the employee in charge) transmits a control point for turning off the failure, a light off control signal to the control computer 20 by using the portable terminal 60 of the control computer 20. The normal recovery operation and fault check can be smoothly performed by executing the point and extinguishing control on the branch circuit of the distribution box.

In addition, when the street lamp is normally restored, the street lamp controller 30 sends it to the control computer 20 to be notified of the recovery situation to the portable terminal 60 of the maintenance company (or staff in charge) to prevent duplicate work and complete the work Whether it can be easily confirmed.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

According to the present invention made as described above, it is possible to selectively control the point and the lights out according to the time zone, section, branch circuit, etc., compared to the collective point-and-light-off method for the whole street light of the existing area, so that unnecessary lighting can be controlled. It can save energy.

In addition, by securing an effective monitoring system for street lamp failures, it solves the vulnerabilities of vulnerable areas, improves the service and reliability of people, and detects the effective power and voltage of each branch circuit as filtered digital signals to determine the load variation. Therefore, by automatically estimating the number of fault lamps, it is possible to minimize the effects of current back current and supply power fluctuations of the street light, thereby improving the accuracy of fault detection and easily reading the power consumption.

Claims (4)

The street lamp controller controls remote lights on the plurality of street lamps, receives the detection signals for the effective power and supply voltage for each branch circuit from the street lamp controller, and automatically calculates the load fluctuation of the branch circuits. The control computer which estimates and manages, And a street light controller for controlling the branch circuits on / off according to a control signal of the control computer, and detecting the effective power and supply voltage variation of each branch circuit as filtered digital signals and transmitting the filtered digital signal to the control computer. Street light remote monitoring / control system. The method of claim 1, wherein the street light controller, Wireless transmitting and receiving means for receiving a control signal from the control computer and transmitting a digital detection signal to the control computer; Relay driving means for controlling the lighting of a plurality of street lights by turning on / off a branch circuit under the control of the following microprocessor; Digital detecting means for detecting the amount of effective power and supply voltage variation of each branch circuit as a filtered digital signal and providing the same to a microprocessor; System reset means for setting the setting environment of each branch circuit to an appropriate value; And The relay driving means is operated in accordance with the control command signal of the control computer to control the on / off branch circuit, and the measurement information about the effective power amount and the supply voltage is obtained from the digital detection means at regular intervals of the system reset means. And a microprocessor for transmitting the measurement information to a control computer when the predetermined value is exceeded after comparing with a set value. The method of claim 2, wherein the digital detection means, Effective for converting the circuit current value from the current sensor installed in each branch circuit and the supply voltage from the voltage sensor at the power input terminal into a digital signal, and then outputting the digital signal for the effective power through a predetermined filtering circuit and a multiplier circuit. A power detector; And And a supply voltage detector for converting an analog value from the voltage sensor into a digital signal and outputting a digital signal with respect to the square of the supply voltage through a predetermined filtering circuit and a multiplier circuit. Control system. In a method of remotely monitoring / controlling a street light while the control computer and the street light controller are interconnected through a wireless data communication network, As the control computer remotely turns off / off the plurality of street lamps for each branch circuit through the street lamp controller, the street lamp controller determines whether the normal operation is performed after controlling the branch circuit on / off and controls the information about the branch circuit. Transferring to a computer; The street light controller detects the effective power and supply voltage of each branch circuit as a filtered digital signal at regular intervals, compares it with a setting value for the normal operation of the branch circuit, and detects the detected information when the allowable variation range is exceeded. Sending to a control computer; The control computer calculates a load amount through the detection information upon receiving the detection information, and when the load amount rises above the setting reference value of the branch circuit, estimates the overload state, and if the value falls below the setting reference value, the breakdown of the branch circuit occurs. Automatically determining and managing the number of street lights; Wirelessly transmitting the determined failure details to a portable terminal of a maintenance worker and instructing failure recovery; And The control computer receives the control point as the maintenance worker sends out the point, lights out control signal for the faulty distribution box using a portable terminal to control the faulty distribution box alone; remote monitoring / street light comprising a Control method.