JPH0696876A - Failure detecting device and lighting system using it - Google Patents

Abstract

PURPOSE:To detect a failure of a discharge lamp in the daytime. CONSTITUTION:Voltage is induced on a transformer CT by the lamp current of a discharge lamp 4. When a control circuit 11 detects the failure of the discharge lamp 4 based on the voltage induced on the transformer CT, it stores the detected result in a memory. When the AC power source is turned off, power voltage is fed to the control circuit 11 from a battery 13, the detected result of a failure is read out, the voltage from the battery 13 is fed to a light emitting diode 12 for luminescence in case of a failure. The failure of the discharge lamp 4 can be detected in the daytime while a power source is not turned on.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an astigmatism detection device suitable for street lights and the like and an illumination system using the same.

[0002]

2. Description of the Related Art Conventionally, high-pressure metal vapor discharge lamps (HID lamps) such as high-pressure sodium lamps and metal halide lamps have been used for outdoor lighting because of their high efficiency and high brightness. The indoor lighting is turned on even in the daytime to assist the daylighting, but the outdoor lighting such as road lighting is mainly turned on only at night. By the way, the check of the defect of the discharge lamp, that is, the detection of the defect of the discharge lamp becomes clear when the power is turned on. However, lighting of these discharge lamps in the daytime in order to detect defects of discharge lamps used for road lighting and the like has not been performed due to problems such as power consumption. That is, there is a problem that discharge lamps for outdoor lighting must be normally performed at night.

[0003]

As described above, conventionally, there has been a problem that the defect of the discharge lamp must be detected at night.

The present invention has been made in view of the above problems, and provides a defect detection device capable of detecting a defect of a discharge lamp even in the daytime without lighting the discharge lamp in the daytime. With the goal.

[0005]

According to a first aspect of the present invention, there is provided an astigmatism detecting device, which includes astigmatism detecting means for detecting astigmatism of a discharge lamp and a holding result capable of holding a detection result of the astigmatism detecting means. Means and a display means capable of displaying the detection result of the defect held by the holding means, and the defect detection device according to claim 2 of the present invention is the defect detection device according to claim 1. The defect detection device comprises at least the output unit of the output unit and the display unit capable of outputting the detection result of the defect held by the holding unit to the outside. The illumination system according to No. 3 includes remote control means for centrally managing the defects of a plurality of discharge lamps based on the output from the output unit.

[0006]

In the present invention, the defect detection means detects a defect of the discharge lamp based on, for example, a decrease in lamp current. The holding means holds the detection result of the astigmatism detection means, and the display means displays the detection result held by the holding means in the daytime, for example. Further, by outputting the detection result of the defect detection means to the remote control means, the remote control means centrally manages the defects of the plurality of discharge lamps.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of a defect detection device according to the present invention.

The terminals 1 and 2 are connected to an AC power supply 3 which generates an AC power supply voltage of 200V. Ballast for terminals 1 and 2
10, discharge lamp 4 and transformer CT for detecting lamp current 1
The secondary winding is connected.

FIG. 2 is a side view showing an example of a case where the lighting device accommodating the discharge lamp 4 in FIG. 1 is used as a street light 9. A pole 7 is buried near the road 6 side of the sidewalk 5. A lighting device 8 is attached to the upper end of the pole 7, and the discharge lamp 4 is housed in the lighting device 8.

The power supply voltage of the discharge lamp 4 is supplied through the ballast 10 when the power is turned on, and the discharge lamp 4 is turned on. The transformer CT outputs to the control circuit 11 a voltage induced in the secondary winding based on the lamp current flowing in the primary winding.
The control circuit 11 is supplied with a power supply voltage when the power is turned on, and monitors the voltage appearing in the secondary winding of the transformer CT. Control circuit
When the lamp current decreases and the voltage of the secondary winding decreases when the power is turned on, 11 determines that the discharge lamp 4 is defective and stores this information in a memory (not shown).

The control circuit 11 is driven by the battery 13 when the daylight illumination becomes bright and the power is turned off. The control circuit 11 reads the information in the memory when the AC power supply is off, and when the information indicating that the discharge lamp is defective has been stored, the light emitting diode 12
It is designed to supply voltage from battery 13. The light emitting diode 12 is attached to, for example, the pole 7 of FIG. 2 in a state where the light emitting portion is exposed so that the light emission can be observed from near the street light 9.
The light emitting diode 12 may be incorporated in the street light 9 at a position where it can be observed near the street light 9, or may be attached to a predetermined fixing member (not shown) provided near the pole 7.

Next, the operation of the embodiment thus constructed will be described.

Now, it is assumed that the daylight illumination is insufficient and the power is turned on. The voltage supplied from the AC power supply 3 is supplied to the discharge lamp 4 via the ballast 10, and the discharge lamp 4 is turned on. Then, the lamp current flows, and the transformer CT outputs a voltage based on the lamp current to the control circuit 11. As a result, the control circuit 11 detects that the discharge lamp 4 is on.

Here, it is assumed that the discharge lamp 4 disappears at the end of its life. Then, the lamp current decreases, and the voltage induced in the secondary winding of the transformer CT decreases. As a result, the control circuit 11 detects that the discharge lamp 4 has been extinguished and stores information indicating a defect of the discharge lamp in a memory (not shown).

Next, when the daylight illumination is sufficient and the power is turned off, the control circuit 11 is driven by the battery 13 and reads the information indicating the defect of the discharge lamp from the memory. When the information indicating the defect of the discharge lamp is stored, the control circuit 11 outputs the DC voltage from the battery 13 to the light emitting diode 12
Supply to and light. The light emitting portion of the light emitting diode 12 can be observed from the vicinity of the street lamp 9, and the observer can easily grasp the defect of the discharge lamp 4 depending on whether or not the light emitting diode 12 emits light.

As described above, in the present embodiment, when the control circuit 11 detects a defect of the discharge lamp 4 from the decrease of the lamp current, the information indicating the defect is stored in the memory and read from the memory after the power is turned off. It is displayed by the light emitting diode 12. Therefore, it is not necessary to turn on the power source to detect the defect of the discharge lamp, and the discharge lamp can be easily checked even in the daytime without lighting the discharge lamp.

The street light 9 may not include the ballast 10 shown in FIG. That is, the AC power supply 3 and the ballast 10 may be installed relatively far from the street light 9. In this case, in order to obtain the power supply voltage for lighting the light emitting diode 12 from the AC power supply 3, new wiring must be provided. For this reason, in the present embodiment, by providing the battery 13, even when the AC power source is installed far from the light emitting diode 12, such wiring is unnecessary, and the display of a defect even when the AC power source is OFF is displayed. It is possible to do.

It should be noted that a magnetic reversal element, for example, may be used instead of the light emitting diode 12 as a means for displaying the defect of the discharge lamp. In this case, for example, a magnetic reversal element drive circuit is provided in place of the control circuit 11, and when the voltage induced in the secondary winding of the transformer CT drops, the magnetic reversal element drive circuit inverts the magnetic reversal element and the defect occurs. Should be set to the state shown. That is, in this case, since the display element is mechanical and the display state does not change even after the power is turned off, it is not necessary to supply a voltage for display and a battery is unnecessary.

FIG. 3 is a circuit diagram showing an astigmatism detecting device and an illumination system using the same according to another embodiment of the present invention. The present embodiment is an example in which the AC power supply and the ballast are arranged near the discharge lamp.

The AC voltage from the AC power supply 3 is supplied to the ballast 22 via the photo switch 21. Photo switch 21
Turns on when daylight is insufficient and turns off when sufficient daylight is available. The output terminal of the ballast 22 is connected to the discharge lamp 4 via the terminals 24 and 25 of the astigmatism detection circuit 23. The ballast 22 is composed of a winding L connected in series with the discharge lamp 4 and a power factor improving capacitor C1 and a resistor R1 connected in parallel.

The AC voltage from the AC power supply 3 is also supplied to the full-wave bridge rectifier circuit 29 of the power supply unit 28 via the terminals 26 and 27 of the spot detection circuit 23. Full wave bridge rectifier circuit
A DC voltage is constantly supplied to the control unit 30 by 29. Between the positive output terminal and the negative output terminal (reference potential point) of the full-wave bridge rectifier circuit 29, there is a resistor R2 of the control unit 30 and a triac B as a light receiving element of a photocoupler.
A series circuit of 1 is connected, and the triac B1 is turned on by the light emitting diode A1 which will be described later. The connection point between the resistor R2 and the triac B1 is connected to the reference potential point via the thyristor SCR1, the resistors R3 and R4 and the light emitting diode 31. A display unit 32 is constituted by the resistor R4 and the light emitting diode 31. The connection point of the resistor R2 and the triac B1 is also connected to the reference potential point via the resistors R5 and R6, and the connection point of the resistors R5 and R6 is connected to the gate of the thyristor SCR1 via the triac B2 serving as a light receiving element of the photocoupler. It is connected to the.

A relay 33 is also connected in parallel with the display unit 32. Current flows through the relay 33 at the same time as the display 32,
The switch 34 is turned on. Switch 34
Are connected to terminals 37 and 38 of the remote control unit 36 via a signal line 35. The terminal 37 is connected to the power supply terminal 39, and the terminal 38 is connected to the reference potential point 40 via the resistors R7 and R8. A series circuit of a resistor R9, a light emitting diode 41 and a thyristor SCR2 is connected between the power supply terminal 39 and the reference potential point 40,
The gate of the thyristor SCR2 is connected to the connection point of the resistors R7 and R8.

The triac B1 of the control unit 30 is controlled based on the lamp current. That is, the ballast 22 and the discharge lamp 4
The primary winding of the transformer CT forming the current detection circuit 44 is connected between the terminals and 25 via the terminals 24 and 25. Trans CT
A full-wave bridge rectifier circuit 45 is connected to the secondary winding of the.
A series circuit of a resistor R10, a capacitor C2, a resistor R11 and a light emitting diode A1 is connected in parallel between the positive output terminal and the negative output terminal (reference potential point) of the full-wave bridge rectifier circuit 45. The light emitting diode A1 emits light when the discharge lamp 4 is turned on and a lamp current flows, thereby turning on the triac B1 of the control unit 30.

The triac B2 of the control unit 30 is controlled based on the input voltage of the ballast 22. The input terminal of the ballast 22 is connected via terminals 46 and 47 to the primary winding of a transformer 49 that constitutes a voltage detection circuit 48. The secondary winding of the transformer 49 is connected to the full wave bridge rectifier circuit 50. Between the positive output terminal and the negative output terminal (reference potential point) of the full-wave bridge rectifier circuit 50, there are a resistor R12, a capacitor C3 and a resistor R.
A series circuit of 13 and the light emitting diode A2 is connected in parallel. The light emitting diode A2 emits light when a voltage is supplied to the ballast 22, and turns on the triac B2 of the control unit 30.

Next, the operation of the embodiment thus constructed will be described.

Now, the daylight illumination is lowered and the photo switch
21 shall be turned on. Then, the power supply voltage is supplied to the ballast 22, and the discharge lamp 4 is turned on. On the other hand, the power supply unit 28 is supplied with voltage from the AC power supply 3, and the control unit
DC voltage is constantly supplied to 30. When the discharge lamp 4 is turned on, a lamp current flows and the transformer CT 2
A voltage based on the lamp current is induced in the secondary winding. The full-wave bridge rectifier circuit 45 rectifies this voltage and applies it to the series circuit of the resistor R11 and the light emitting diode A1. This allows
The light emitting diode A1 emits light and the triac B1 which is a light receiving portion is turned on. On the other hand, when the power supply voltage is supplied to the ballast 22, a DC voltage is also generated in the full-wave rectification bridge 50 of the voltage detection circuit 48, and the light emitting diode A2 also emits light. When the light emitting diode A2 emits light, the triac B2 of the control unit 30 is turned on, and the thyristor SCR1 is triggered. However, since the triac B1 is on, no current flows through the thyristor SCR1 and the thyristor SCR1 remains off. That is, the voltage supplied from the power supply unit 28 to the control unit 30 is not given to the display unit 32. That is, when the discharge lamp 4 is turned on, the light emitting diode 31 of the display unit 32 does not emit light.

Here, it is assumed that the discharge lamp 4 goes out and the lamp current decreases. Then, the light emitting diode A1 of the current detection circuit 44 stops emitting light, and the triac B1 of the control unit 30 is turned off. Even in this case, since the power supply voltage is supplied to the ballast 22, the light emitting diode A2 of the voltage detecting circuit 48 continues to emit light, and the triac B2 supplies a trigger to the thyristor SCR1. As a result, the thyristor SCR1 is turned on, and the light emitting diode of the display unit 32 is turned on.
31 lights up.

Next, the surroundings become bright and the photo switch
21 shall turn off. Then, the light emitting diodes A1 and A2 stop emitting light, and the triacs B1 and B2 are turned off. However, a voltage is applied to the thyristor ACR1 from the power supply unit 28 to maintain the ON state, and the light emitting diode 31 of the display unit 32 continues to emit light. That is, even during the daytime when the supply of the power supply voltage to the discharge lamp 4 is stopped, the light emitting diode 31 of the display unit 32 emits light, and the abnormality of the discharge lamp 4 can be detected.

Further, in this embodiment, at the same time when the light emitting diode 31 emits light, a current also flows through the relay 33 and the switch 34 is turned on. Then, the terminal 3 of the remote control unit 36
7, 38 are short-circuited, a current flows through the resistors R7, R8 and the thyristor SCR2 is turned on. As a result, the light emitting diode 41 emits light, and the remote control unit 36 can also detect the abnormality of the discharge lamp 4.

As described above, in this embodiment, the same effect as that of FIG. 1 can be obtained, and a plurality of discharge lamps are centrally managed by the remote control unit provided at a long distance from each street light. It has the advantage that

FIG. 4 is a circuit diagram showing another embodiment of the present invention. 4, the same components as those in FIG. 3 are designated by the same reference numerals and the description thereof will be omitted.

In the present embodiment, the remote control unit 36, the relay 33 and the switch 34 are deleted, and the display unit of the fault detection circuit 53 is removed.
The point that 32 is separated is different from the embodiment of FIG. Astigmatism detection circuit
53 is provided with terminals 51 and 52 for connecting to the display unit 32. The connection point of the resistor R2 and the triac B2 is connected to the terminal 51 via the thyristor SCR1 and the resistor R3, and the terminal 52 is connected to the reference potential point. Terminal 5
Reference numerals 1 and 52 are connected to the series circuit of the resistor R4 of the display section 32 and the light emitting diode 31 via a signal line. The display unit 32 is housed in a housing having a waterproof structure, for example.

It is obvious that the embodiment constructed in this way also exhibits the same operation as the embodiment of FIG.
In the present embodiment, the display unit 32 is housed in a casing having a waterproof structure, so it is possible to embed the display unit 32 in the ground, for example. Further, there is an advantage that the display unit 32 can be installed at a remote position by extending the signal line.

[0034]

As described above, according to the present invention, since the holding means holds the detection result of the defect detection means,
There is an effect that the defect detection of the discharge lamp can be performed even in the daytime without turning on the discharge lamp in the daytime.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a defect detection device according to the present invention.

FIG. 2 is a side view showing an example of a case where the lighting device housing the discharge lamp 4 in FIG. 1 is used as a street light 9.

FIG. 3 is a circuit diagram showing a defect detection device and an illumination system using the same according to another embodiment of the present invention.

FIG. 4 is a circuit diagram showing another embodiment of the present invention.

[Explanation of symbols]

4 ... Discharge lamp, 11 ... Control circuit, 12 ... Light emitting diode, 13 ...
Battery, CT ... Transformer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Shibata 1-4-2 Mita, Minato-ku, Tokyo TOSHIBA LIGHTEC CORPORATION

Claims (4)

[Claims] 1. A defect detection unit for detecting a defect of a discharge lamp, a holding unit capable of holding a detection result of the defect detection unit, and a detection result of the defect held by the holding unit. A defect detection device comprising: a display unit capable of displaying. 2. The output unit capable of outputting the detection result of the defect held by the holding unit to the outside, and at least the output unit of the display unit. Defect detection device. 3. A lighting system comprising a remote control means for centrally managing defects of a plurality of discharge lamps based on an output from the output section. 4. The defect detection device according to claim 1, wherein the display unit is installed so as to be separable from the defect detection unit and the holding unit.