JPH10189260A - Luminaire monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a luminaire monitoring device in which high abnormality determining precision can be provided with simple constitution. SOLUTION: A device is provided with a current detector 12 and a voltage detector 13 inserted in an AC power line, a memory device to memorize detection data of the current detector 12 and the voltage detector 13 when all the luminaires are correct as correct time data, and an operating device to take the detection data of the current detector 12 and the voltage detector 13 to be compared with the memorized correct time voltage data to operate a corrected current value, and generate an abnormality detection signal when difference between the correct time current value and a measured current value exceeds a predetermined range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for monitoring an abnormality such as a broken ball of a lighting facility disposed along a road, for example.

[0002]

2. Description of the Related Art FIG.
FIG. 1 shows a conventional apparatus described in Japanese Patent Publication No. 7 (1995), in which 1 is a main operation panel, 2 is a signal transmission line, 3 is a terminal,
Is an illumination lamp. In the figure, each lighting lamp L is connected in parallel to an AC power supply via a terminal 3 installed for each lighting lamp L. Each terminal 3 is connected to the signal transmission line 2.
And connected to the main control panel, respectively.
Monitor the status of multiple luminaires in remote locations.

[0003] Japanese Patent Publication No. 1-137597 discloses an apparatus for detecting a burnout of an illumination lamp.

[0004]

In the above-described apparatus, it is necessary to install each terminal 3 for each lighting lamp L, and there is a problem that both equipment costs and installation work costs are high. Further, in the detection of the out-of-ball, the detection value of the current flowing into the illumination lamp L has been used as it is to determine an abnormality. Therefore, it is erroneously determined that a change in current due to a change in power supply voltage (10% or more) is abnormal. There was a problem that it was easy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lighting fixture monitoring apparatus which has a simple structure and high accuracy of abnormality determination.

[0006]

According to a first aspect of the present invention, there is provided a lighting apparatus including a current detector and a voltage detector inserted into an AC power supply line, and detection data of the current detector and the voltage detector. A storage device that stores the detection data of the current detector and the voltage detector when the data is normal as normal time data, and captures the detection data of the current detector and the voltage detector when the data is normal. A calculation device that corrects the current value by comparing it with the voltage data and issues an abnormality detection signal when the difference between the current value at the time of normal operation and the current value at the time of measurement exceeds a predetermined range. is there.

In a second aspect of the present invention, the current detector and the voltage detector inserted into an AC power supply line, and the detection data of the current detector and the voltage detector are taken in, and the above-mentioned lighting apparatus is used when all of the lighting fixtures are normal. A storage device that stores the detection data of the current detector and the voltage detector as normal data, and captures the detection data of the current detector and the voltage detector and compares the data with the stored normal voltage data. Correct the current value and calculate
A terminal device including an arithmetic unit that issues an abnormality detection signal when a difference between the current value during normal operation and the current value during measurement exceeds a predetermined range, and the abnormality detection signal from the plurality of terminal devices. The system has a central monitoring device for identifying a system in which an abnormality has occurred in response to the request.

According to a first aspect of the present invention, the presence or absence of an abnormality in a lighting fixture is determined by correcting a measured current by a ratio between a reference voltage and a measured voltage in a normal state and comparing the corrected current with the reference current. According to a second aspect of the invention, the presence or absence of an abnormality in the lighting fixture is determined by comparing the measured current with a reference current after correcting the measured current with a ratio between the reference voltage and the measured voltage in a normal state. An abnormal point is detected by notifying the monitoring device.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a diagram showing a configuration of an apparatus according to Embodiment 1 of the present invention. In the figure, L is a lighting lamp, 1 is a central monitoring device, 2 is a signal transmission line, 3 is a monitoring terminal, 4 is a monitoring master station, 10 is an AC power supply, 11a and 11b are power supply lines for supplying power to the lighting lamp L, 12 Is a current detection CT provided on a power supply line on the power supply side of each group (group A, etc.) comprising a plurality of illumination lamps L;
This is a voltage detection line branched from a and 11b. Also,
A and B show the range of each lighting system. In the figure, power supply 1
0 supplies power to the respective illumination lamps L connected in parallel by the power supply lines 11a and 11b. The current detection CT 12 detects a current flowing through the power supply line 11 a and inputs a current signal proportional to the current value to the monitoring terminal 3. In addition, the voltage detection line 13
Inputs a voltage signal proportional to the voltage applied to the power supply lines 11a and 11b to the monitoring terminal 3. Each monitoring terminal 3 is connected via a signal transmission line 2 and connected to a central monitoring device via a monitoring master station 4.

FIG. 2 is a diagram showing the configuration of the monitoring terminal. In the figure, 14 is a current signal input terminal from the current detection CT 12, 15 is a voltage signal input terminal from the voltage detection line 13, 16 is an operational amplifier for signal amplification, and 17 is a phase for detecting a phase between voltage and current. The detection unit 18 detects the detected voltage
A CPU operation unit for calculating data correction and abnormality judgment based on the current and phase signals, and a transmission processor 19 for transmitting an output from the CPU operation unit 18 and taking in a signal from a signal transmission line. . FIG. 3 is a diagram showing a basic circuit configuration for lighting the illumination lamp L. In the figure, 10 is a power supply for supplying a voltage e, i is a current, XL is the reactance of the ballast,
RL is the internal resistance of the illumination lamp L, and XC is the reactance of the phase advance capacitor C.

FIG. 4 shows the voltage, current and impedance of the circuit of FIG.
It is a figure showing the relation of dance. However, this shows a state in which no phase advance capacitor is attached. In the figure, the suffix “D” means immediately after the start of the illumination lamp L, and “S” means after the start and the transition to the stable state. Immediately after startup, the impedance is small and the lag phase angle is large, but thereafter the impedance gradually increases, and the current draws a semicircular locus.
Stable in S state. FIG. 5 shows the transition of the absolute value of the current from the start to the transition to the stable state. Although the current immediately after startup is large, it gradually decreases and becomes stable.

FIG. 6 shows the current when the phase-advancing capacitor in FIG. 3 is attached. Is indicates a lighting current in a normal stable state, and Ie indicates a current (only a phase-advancing capacitor) in a state where an illumination lamp is out. FIG. 7 shows a current vector in a normal state in the group of the illumination lamp L (n illumination lamps) in FIG. A current of the sum of n currents IS flows in FIG.

FIG. 8 shows the current when one lamp is stopped due to a burnout or the like in a group of lighting equipment provided with a phase-advancing capacitor. The lag phase is slightly reduced due to the influence of the leading current Ie, and a broken ball or the like can be regarded as a change in the current phase. Further, the absolute value of the current is smaller by one lamp, which indicates that a change in the absolute value of the current can also catch an abnormality such as a broken ball.
In order to detect such an abnormal change in the absolute value and phase of the current, it is determined by the sensitivity of the detector. However, according to experiments, it was possible to detect an abnormal current within 30 lamps per group. .

FIG. 9 shows a procedure for taking in and storing a reference value for judging abnormality, that is, a voltage / current value in a normal circuit state. Usually, the illumination system is divided into a plurality of systems, and power is supplied from the power supply 10 to each system. Further, each lighting system is divided into several groups as shown in FIG. 1, and a voltage / current signal is taken out on the power supply side of each group, and this signal is monitored for each group. 3 to the central monitoring device 1. Each monitoring terminal 3 has a unique address for identification, and by specifying the address from the central monitoring device 1, any monitoring terminal 3 can be called to check the status. In the procedure, as shown in FIG. 9, when an instruction for setting a reference value is issued from the central monitoring device 1, addresses of monitoring terminals to be sequentially read are specified. Thereafter, the voltage value and the current value are taken in, and the current value is corrected to a value of the reference voltage value and stored. This is performed for all monitoring terminals. FIG. 9 shows the procedure on the central monitoring device 1 side. The retrieved data is also recorded and stored on the monitoring terminal side.

FIG. 10 shows a procedure of signal processing in the monitoring state. The central monitoring device 1 specifies (searches) the monitoring terminals 3 to be monitored sequentially and performs monitoring. First, the address data of the monitoring terminal to be monitored is fetched, and then the voltage and
Capture the current value. After correcting the current value from the ratio of the measured voltage and the reference voltage to remove the influence of the fluctuation of the power supply voltage, the difference between the reference current and the reference phase is calculated, and the difference between the reference current and the reference phase is compared with a preset determination reference. The presence or absence of an abnormality is also determined. An alarm is issued if there is an abnormality. At this time, since the address of the monitoring terminal is known, the abnormal section can be easily determined.

[0016]

As described above, according to the first aspect of the present invention, the measured current is corrected by the ratio between the normal reference voltage and the measured voltage and then compared with the reference current. Since the presence / absence is determined, the influence of the fluctuation of the power supply voltage can be removed, and the measurement accuracy can be improved. According to the second invention, the presence or absence of an abnormality in the lighting fixture is determined by correcting the measured current with the ratio between the reference voltage and the measured voltage in the normal state and comparing the corrected current with the reference current. In such a case, the abnormal point is easily detected by immediately notifying the central monitoring device.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a monitoring terminal.

FIG. 3 is a diagram showing a basic circuit configuration of an illumination lamp.

FIG. 4 is a diagram showing the relationship among the voltage, current, and impedance of a high-pressure sodium lamp.

FIG. 5 is a diagram showing a change in current after activation of a high-pressure sodium lamp.

FIG. 6 is a vector diagram showing a current flowing through a high-pressure sodium lamp equipped with a rate improving capacitor.

FIG. 7 is a vector diagram of a current in a power supply unit.

FIG. 8 is a vector diagram of a current in the power supply unit when one lamp is cut off.

FIG. 9 is a flowchart showing a procedure for reading a reference value.

FIG. 10 is a flowchart showing a data processing procedure at the time of monitoring.

FIG. 11 is a configuration diagram showing a conventional device.

[Explanation of symbols]

Reference Signs List 1 central monitoring device, 2 signal transmission line, 3 monitoring terminal, 10 power supply, 11a, 11b power supply line, 12C
T, 13 Voltage detection line

Claims (2)

[Claims] 1. A lighting fixture monitoring device for monitoring an operation abnormality of a plurality of lighting fixtures connected in parallel to one AC power supply, wherein a current detector and a voltage detector inserted into the AC power supply are provided. A storage device that captures detection data of a lighting device and a voltage detector and stores detection data of the current detector and the voltage detector as normal data when all of the lighting fixtures are normal; and the current detector and a voltage. The detection data with the detector is taken in, the current value is corrected and calculated by comparing with the stored normal voltage data, and the difference between the normal current value and the current value at the time of measurement falls within a predetermined range. A lighting device monitoring device, comprising: a calculation device that issues an abnormality detection signal when the value exceeds the threshold value. 2. A lighting equipment monitoring device for monitoring an operation abnormality of a lighting equipment in a lighting equipment having a plurality of lighting systems in which a plurality of lighting equipment connected in parallel to one AC power supply are connected in parallel. A current detector and a voltage detector inserted into the AC power supply line, and captures detection data of the current detector and the voltage detector, and the current detector and the voltage when all of the lighting fixtures are normal. A storage device for storing detection data of the detector as normal data, and a correction operation for correcting the current value by taking in the detection data of the current detector and the voltage detector and comparing with the stored normal voltage data A terminal device including an arithmetic unit that issues an abnormality detection signal when a difference between the current value during normal operation and the current value during measurement exceeds a predetermined range, and the abnormality from the plurality of terminal devices. Inspection A lighting device monitoring device, comprising: a central monitoring device that receives an output signal and identifies a system in which an abnormality has occurred.