JP2006073348A - Lamp breakage detection device and lamp breakage detection method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp breakage detection device which is a device for detecting the lamp breakage of a discharge lamp, allowing the lamp located at a location that is difficult to check, such as a remote place, an invisible position or a high position to be determined, and to provide a lamp breakage detection method. <P>SOLUTION: This lamp breakage detection device is provided with: a voltage varying part for adjusting a voltage; an output adjustment part for adjusting output depending on a distance; a primary voltage detecting circuit capable of detecting and displaying the application voltage (primary voltage) level; a secondary voltage detecting circuit, capable of detecting and displaying a terminal-to-terminal voltage (secondary voltage) of a lamp main circuit; and a secondary voltage detecting circuit, capable of detecting and displaying a discharge current (secondary current) level. A detector wire is connected to a power source main circuit of the discharge lamp; a voltage is applied, by gradually increasing it to a value necessary for starting discharge of each measurement object lamp by turning the power on; and the breakage situation of the lamp is determined by the current value, the application voltage and the terminal-to-terminal voltage at that time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to the field of discharge lamps such as HID (High Intensity Discharge Lamp).

  There is an HID (High Intensity Discharge Lamp) as an illumination light source used for general outdoor lamps, road / factory lighting, and the lighting method is changed to main lighting after initial discharge. This initial discharge is lit by applying a high voltage lighting pulse of 5 to 20 kV by an igniter (lighting circuit) or the like.

On the other hand, as a detection mechanism when these discharge lamp lamps are broken, for example, in a projector application, a mechanism for detecting a low voltage and a surface temperature of a lamp using an igniter is known. Page 3, claims (means for solving the problems)), and a method for detecting a slight change in input voltage using a pulse transformer is known as a neon tube (Patent Document 2, page 2). And claims (examples)).
JP 2003-195418 A JP-A-5-346769

  When the lamp of the discharge lamp is broken, as described above, in the prior art, it is necessary to detect the breakage of the lamp by incorporating a detection mechanism in the device at hand, and there is no means for determining from a distance. In addition, there were similar problems in high places and places that were difficult to see. For this reason, if the lamp was defective, it was not possible to confirm the breakage unless the inspection was conducted.

  Therefore, the present invention can detect the breakage of a discharge lamp installed in a place where field inspection is difficult such as far away, and can warn the user when the lamp is broken. Is.

  In other words, the lamp breakage detecting apparatus of the present invention includes a boosting unit that generates a high voltage in the lamp, a voltage variable unit that can adjust the voltage, an output adjusting unit that can adjust the output according to the distance, and an applied voltage (primary voltage) level. Voltage detection circuit that can detect and display the voltage, secondary voltage detection circuit that can detect and display the voltage across the lamp main circuit (secondary voltage), and secondary that can detect and display the discharge current (secondary current) level And a voltage detection circuit.

  That is, the mechanism of the present invention connects the detector wiring to the power supply main circuit of the discharge lamp, for example, and gradually applies the voltage required for starting discharge of each measurement target lamp (hereinafter referred to as a specified voltage) by turning on the power supply. The lamp breakage status is determined based on the current value (hereinafter referred to as secondary current), applied voltage (hereinafter referred to as primary voltage), and voltage between terminals (hereinafter referred to as secondary voltage).

  As a phenomenon at that time, (1) the damaged lamp does not discharge even if the voltage is applied up to the discharge start voltage, so the secondary voltage continues to increase in proportion to the primary voltage, (2) the damaged lamp does not discharge. Therefore, since the current proportional to the short-circuit impedance that flows at the time of discharge does not flow, the secondary current does not change with respect to the primary voltage at the specified voltage, so that it can be known that it is damaged.

  The discharge circuit is preferably provided with a leakage transformer capable of supplying a constant current at the time of a short-circuit impedance (discharge) as a boosting portion in order to obtain a stable discharge with respect to a wiring laid far away.

  Furthermore, for a far distance (for example, when the distance exceeds 30 m), it is preferable to arrange a reactor that can cancel the electrostatic capacity in order to obtain a stable and accurate determination result.

  According to the present invention, it is possible to detect breakage of a lamp in a distant place, and it is also possible to detect breakage of a lamp in a place where it cannot be visually observed or where inspection is difficult. Etc. In addition, it is possible to determine whether or not the cause of lamp non-lighting is lamp breakage, and it is possible to improve efficiency in dealing with malfunctions.

{The best mode of the lamp breakage detection device: FIGS. 1 and 2}
The lamp 1 is a high-pressure mercury lamp, for example, and is lit by applying a high pressure between the electrodes. If the lamp is damaged, it will not discharge with the initial application of high pressure.

  In this form, for example, as shown in FIG. 1, the measurement is started by connecting and applying the device output adjusting unit 8 to the lamp power supply circuit 2, and the place is set as a voltage application point 3. This is automatically performed by the system controller 14, and when the measurement start switch 16 is turned on, the power switch 5 is turned on, the voltage variable unit 6 is varied, the voltage is increased by the boost unit 7, and is adjusted by the output adjustment unit 8. Thereafter, a voltage is applied to the voltage application point 3.

  The power system is driven by power from a power plug 4 inserted into a power outlet. The voltage variable unit 6 is variable by a slider and can be varied from 0 to a power supply voltage. As the best mode, it rises by automatic control and can be stopped at the value at the start of discharge and a certain maximum applied voltage. As the boosting unit 7 that boosts the variable voltage to a high voltage, one having a boosting function and a constant current stable supply function is arranged. There are combinations of transformers and ballasts, igniters, etc., but by adopting a leakage transformer (not shown) as the best mode, it is possible to limit the short-circuit current in a compact and stable manner, and judge whether there is damage. Can be easily.

  As a detection circuit, a primary voltage detection circuit 9 is arranged in front of the boosting unit 7, a secondary current detection circuit 10 and a secondary voltage detection circuit 11 are arranged on the secondary side, and each is detected and displayed. Each waveform can be provided with a transducer and a terminal so that it can be output as a record.

  The change of the secondary voltage detection circuit 11 when the primary voltage detection circuit 9 is raised is compared, and the comparison circuit 12 monitors whether the secondary voltage drops below the discharge start voltage of the lamp. If the secondary voltage does not drop, it is determined that the lamp is broken. In the best state, the result is displayed on the determination result display unit 17 as being broken, and the power switch is shut off. The determination result display unit 17 is preferably supplied with power from the primary side of the power switch 5 and provided with a dedicated switch (not shown).

  The value obtained when the primary voltage detection circuit 9 is raised and the value of the secondary current detection circuit 10 are calculated by the integration circuit 13, and when the discharge current of the corresponding lamp is exceeded, it is determined as normal and the discharge of the corresponding lamp is performed. If the integration circuit 13 does not exceed the value below the start voltage, it is determined that the lamp is broken. In the best state, the result is displayed on the determination result display unit 17 as being broken, and the power switch is shut off. Note that it is preferable that the determination result display unit 17 is provided with a dedicated switch that supplies power from the primary side of the power switch 5 and can be shut off after the determination or in the event of an abnormality.

  FIG. 2 shows an automatic detection flow of the damage detection apparatus shown in FIG. The determination result may be any, but the accuracy can be improved by using an AND circuit of the comparison circuit 12 and the integration circuit 13.

  The output adjustment unit 8 is provided in consideration of the distance to the object and environmental conditions. In particular, when there are 30 m or more cables, it is better to arrange a corresponding amount of reactors (not shown). This device can be used as a device that performs all operations automatically and periodically when the circuits are assembled as a fixed type or when the location is in a remote place or a place where measurement is difficult.

{The actual state of the lamp lighting device: Fig. 3 to Fig. 4}
FIG. 3 shows an embodiment of the lamp breakage detecting apparatus according to the present invention.
The lamp is for a high-capacity high-pressure sodium lamp, and the applied voltage can be applied up to 8 KV. The AC power supply 4 is applied by a power switch 5 and supplied to a slidac that is a voltage variable unit 6. The voltage is raised from 200 V to 6600 V by a leakage transformer as the boosting unit 7. The output adjustment unit 8 has a reactor corresponding to the cable length (capacity equivalent to the capacitance calculated based on the cable type and length and can cancel it), and the clip at the voltage application point 3 is connected to the lamp power supply. By connecting to the circuit 2, a circuit is formed and damage detection is possible.

  As this apparatus, application is started by manually turning on the power switch 5. The secondary voltage is raised manually by the slider of the voltage variable unit 6. The primary voltage detection circuit 9, the secondary voltage detection circuit 10, and the secondary current detection circuit 11 are visually confirmed by a panel meter, and the secondary voltage continues to increase in proportion to the primary voltage. The case where the secondary current does not change with respect to the secondary voltage is determined as broken.

  This lamp breakage detection device can determine the lamp breakage status by remote monitoring with road lights, outdoor lights, factory lights and the like.

In addition to this, the breakage detection device can be used for the following purposes.
(1) Inter-electrode pressure test device It is possible to test the insulation withstand voltage only between the phases without any gap between the ground, especially after cable joint work or after panel work.
(2) Withstand voltage tester It can also be used as a general withstand voltage tester. Especially when a leakage transformer is installed, current exceeding a certain level does not flow even when dielectric breakdown occurs. It can be done safely.
(3) Test transmission (short-circuit detection) equipment After cleaning inspection and modification work of panels and equipment, a short-circuit accident may occur after power transmission due to misplacement of tools or forgetting to remove short-circuit pieces or grounding wires. If it is applied between phases immediately before power transmission by this device (this is called trial power transmission), it can be confirmed in advance whether there is a short-circuited state, and power can be transmitted safely.
(4) Lamp starting discharge test apparatus It can also be used as an apparatus for observing the state of the starting discharge of the lamp.

1 is a schematic view of a lamp breakage detecting device of the present invention. It is the flowchart figure which showed an example of the automatic detection flow of the lamp breakage detection apparatus of this invention. 1 is a schematic circuit diagram showing an embodiment of the present invention. It is the whole figure which showed an example of the external appearance structure of the lamp breakage detection apparatus of this invention.

Explanation of symbols

1. Lamp 2. 2. Lamp power supply circuit 3. Voltage application point 4. AC power supply 5. Power switch Voltage variable unit 7. Boosting unit 8. Output adjustment unit 9. Primary voltage detection circuit 10.2 Secondary current detection circuit 11.2 Secondary voltage detection circuit 12. Comparison circuit 13. Integration circuit 14. System controller 15. Control 16. Measurement start switch 17. Judgment result display section

Claims (5)

A booster for generating a high voltage in the lamp;
A voltage variable part that can adjust the voltage,
An output adjustment unit that can adjust the output according to the distance;
A primary voltage detection circuit capable of detecting and displaying an applied voltage (primary voltage) level;
A secondary voltage detection circuit capable of detecting and displaying the voltage (secondary voltage) between terminals of the lamp main circuit;
A secondary voltage detection circuit capable of detecting and displaying a discharge current (secondary current) level;
A lamp breakage detection device comprising: 2. The lamp breakage detection apparatus according to claim 1, wherein a leakage transformer is arranged as a voltage application unit for applying a generated voltage to the lamp main circuit. 3. The lamp breakage detecting apparatus according to claim 1 or 2, wherein a reactor is disposed as an output adjusting unit capable of adjusting an output according to a distance. The lamp breakage detection device according to any one of claims 1 to 3, wherein the applied voltage (primary voltage) is compared with the inter-terminal voltage (secondary voltage) after application to the discharge start voltage of the lamp to be measured. A method of detecting breakage depending on whether or not the threshold is exceeded. 5. The lamp breakage detecting device according to claim 1, wherein an applied voltage (primary voltage) after being applied up to a discharge start voltage of a lamp to be measured is detected, and a current value (secondary current) corresponding thereto is not more than a certain value. A method of detecting breakage depending on whether or not.

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