KR200233403Y1 - Fault condition detecting device of lighting circuit - Google Patents

Abstract

The present invention is a device for detecting a fault condition of a lamp circuit having a lamp ballast connected to a power supply and a discharge lamp connected to the ballast, the first current sense and a first current for detecting a current flowing between the ballast and the lamp. A lamp failure signal generator that amplifies the current detected by the sense to generate a lamp failure signal, a second current sense for detecting the current flowing between the power supply side and the ballast, and amplifies the current detected by the second current sense to stabilize the ballast. The ballast fault signal generator that generates a fault signal, a voltage detection sense for detecting whether a voltage is applied to the power supply side, and a lamp fault signal, a ballast fault signal, and a voltage application signal are received and notified to the central controller. It comprises a communication control unit.

Description

Fault condition detecting device of lighting circuit

1 is a circuit diagram of a failure state detection device of the lamp circuit of the present invention.

The present invention relates to a failure state detection device that detects a failure point of a lighting lamp circuit and informs the central control system. Especially, it is used in a lighting fixture failure information collection system to identify and check the failure state of various lightings scattered in various places. It relates to a failure state detection device.

In general, dozens or hundreds of street lamps around the road are installed to control the power supply at one place.In case of inspection on each street, there is a lot of inspection time because it arrived at each electric pole and inspected for failure. There was a disadvantage.

In addition, to check the abnormality of the streetlight and repair it, a large number of lamps and stabilizers were loaded on the maintenance vehicle, and each streetlight was visited, resulting in a traffic jam caused by the maintenance vehicle.

Conventionally, a device for detecting and displaying a failure state of a lighting lamp circuit includes a failure display device, which is a registered registration plan (Utility Model Publication No. 89-3957), and a method and device for detecting lighting lamp failure information include a patent application which is the applicant's prior application. Published in 90-1387.

In addition, a device for collecting fault information of the lamp circuit of the invention has been disclosed in Korean Patent Publication No. 95-13607.

The above-mentioned fault information collecting device has a central control unit composed of a central control CPU, a display unit, a keyboard, a switch control unit, a communication unit, etc. The central control unit can smoothly operate by controlling various functions by a program. Have the ability to

The central control unit also has a communication port that can communicate with other terminals or computer systems using dedicated lines or carrier frequencies.

The central control unit communicates with the fault detection device connected to the lamp circuit to check whether there is a fault and collect the fault information.

Normal lighting lamp lighting circuit is composed of a choke coil and a ballast with a high voltage pulse generator circuit and a lamp. In the high-voltage pulse generating circuit, a pulse voltage of several KV is generated by the resonance of the condenser and the choke coil to light the discharge lamp.

The fault detection device consists of a voltage fault detection circuit, a ballast fault detection circuit, and a lamp failure detection circuit.

The voltage anomaly detection circuit is composed of a resistor, an optical coupling element composed of a light emitting element and a light receiving element, a detection and logic signal generator, and if there is no abnormality in the voltage, the required amount of light is obtained from the light emitting element. This voltage is converted into the required digital signal by the detection and logic signal generator.

The ballast failure detection circuit has the same structure as the voltage abnormality detection circuit, and is converted into the necessary digital signal by the detection and logic signal generation unit, and transmits the signal to the terminal CPU.

Lamp failure detection circuit is configured to detect the current flowing through the lamp by using a current transformer and to amplify it to obtain the voltage according to the lamp failure.

In this system, the central control unit collects the fault information by accessing the fault detection device in order to determine whether there is a fault such as a discharge in the system.

However, the conventional fault detection device has a drawback of low reliability because the voltage generated from the power supply and the ballast are both high voltages, so that the electronic parts are easily deteriorated or fail. Therefore, there is a need for a stationary state detection device capable of collecting fault information in a state separated from high voltage.

It is an object of the present invention to provide a failure state detection device for a lighting lamp circuit which can improve the above-described invention and devises of the present invention so as to more reliably grasp information of a failure state.

The present invention is a device for detecting a failure state of a lamp circuit having a lamp ballast connected to a power supply and a discharge lamp connected to the ballast, the first current sense for detecting a current flowing between the ballast and the lamp, and Amplifies the current detected by the current sense to generate a lamp failure signal, a second current sense for detecting the current flowing between the power supply side and the ballast, and amplifies the current detected by the second current sense The control unit receives a ballast fault signal generating unit that generates a ballast fault signal, a voltage detection sense that detects whether a voltage on the power supply side is applied, generates a voltage application signal, a lamp fault signal, a ballast fault signal, and a voltage application signal to the central controller. Informing is made including a communication control unit.

When a control switch is provided between the ballast and the power supply, and a control signal for controlling the control switch is applied from the communication control unit, the lighting of the lamp can be controlled remotely.

The first current sense and the second current sense use a current transformer, and the voltage detection sense uses a photocoupler to electrically separate the power supply circuit and the voltage application signal.

The present invention will be described below with reference to the drawings.

The present invention, as shown in Figure 1, is connected to a lamp circuit having a lamp ballast 10 connected to the power source 1 and a lamp 20 connected to the ballast to detect a fault condition, the configuration of the ballast A first current sense 14 for detecting a current flowing between the 10 and the lamp 20, and a lamp failure signal generator 15 for generating a lamp failure signal by amplifying the current detected by the first current sense. And a second current sense 12 for detecting a current flowing between the power supply side and the ballast, a ballast failure signal generator 13 for amplifying a current detected by the second current sense to generate a ballast failure signal, and a power supply side. And a communication detection unit (16) which detects whether or not the voltage is applied and generates a voltage application signal, and receives a lamp failure signal, a ballast failure signal, and a voltage application signal to inform the central controller.

In addition, a control switch 30 is provided between the ballast 10 and the power supply 1, and a control signal for controlling the control switch is applied from the communication control unit so as to remotely control the lighting of the lamp.

Here, the first current gen and the second current sense use a current transformer, and the voltage detection sense uses a photo coupler to electrically separate the power supply circuit and the voltage application signal.

In this way, the high voltage pulse of the ballast is not directly applied to the electronic component, thereby preventing failure due to deterioration of the electronic component.

When the light emitting diode D9 of the photo coupler PC3 emits light through the resistor R12, the voltage detection sense connected to the power source 1 turns on the photo coupler PC3, which is a light receiving element, and turns the input of the inverter UIC low. Make the inverter output high and output the voltage application signal.

The ballast failure signal turns on the transistor Q2 when the secondary current of the current transformer C / T, which is the current sense 12 connected between the power supply 1 and the ballast 10, turns on and the output of the inverter UIA becomes high. Is output as.

The lamp failure signal turns on the transistor Q1 when the secondary current of the current transformer C / T, which is the current sense 14 connected between the ballast 10 and the lamp 20, is turned on so that the output of the inverter UIB becomes high. Is output as.

The method of judging the failure part of the lighting lamp circuit is a normal wave when the high-low state is repeated more than 100 times because the voltage application signal, the ballast failure signal, and the lamp failure signal are all square waves. If the repetition of the high-low state is less than 100 times or keeps the low state, there is an error in the power line 1 of the voltage application signal, and the lamp failure signal is the high-low state repetition is less than 100 times or the low state continues. If it is determined that the lamp is broken or not connected, it is determined that the ballast failure signal is not connected when the high-low state repetition of the ballast failure signal is less than 100 times or goes low continuously.

The communication control device judges such a failure state, codes it into a digital signal, and transmits it to the central control device through the communication line. Of course, the central control unit communicates with each other by making a communication protocol.

The central control unit may turn on the lamp 20 through the communication control unit. When the lighting signal is sent to the communication control unit, the communication control unit emits the light emitting diode PC1 with the control signal control high, and then receives the light receiving transistor ( PC1) is turned on so that another light emitting diode PC2 emits light, and then the light receiving SCR PC2 is turned on to operate the trigger circuit of the triac Q4 to turn on the triac. Thus, power is supplied to the ballast. The use of light-emitting and light-receiving elements as a demonstration is intended to ensure electrical separation.

If you want to turn off the lamp, you can make the control signal low but the operation is reversed.

As described above, in the present invention, since the high voltage part, the power supply side, the ballast output side, and the electronic circuit of the fault detection unit are separated from each other by the optical element and the current transformer, the voltage operation is stable and the deterioration is prevented. It can increase the reliability.

Claims (3)

A device for detecting a fault condition of a lamp circuit having a ballast for a lamp connected to a power source and a discharge lamp connected to the ballast, the device comprising: a first current sense for detecting a current flowing between the ballast and the lamp; Amplifying the current detected by the sense to generate a lamp failure signal, a second current sense for detecting a current flowing between the power supply side and the ballast, and amplifies the current detected by the second current sense The central control unit receives the ballast failure signal generator that generates a ballast failure signal, a voltage detection sense that detects whether a voltage is applied to the power supply side, and generates a voltage application signal, and receives the lamp failure signal, the ballast failure signal, and the voltage application signal. An apparatus for detecting a failure state of a lighting lamp including a communication control unit for informing a user. 2. The lighting lamp circuit of claim 1, wherein a control switch is provided between the ballast and the power supply, and a control signal for controlling the control switch is applied from the communication control unit to remotely control the lighting of the discharge lamp. Status detection device. The lighting lamp circuit of claim 1, wherein the first current sense and the second current sense use a current transformer, and the voltage detection sense uses a photo coupler to electrically separate the power supply circuit and the voltage application signal. Status detection device.