JP2002260883A - Lamp non-lighting detecting device for illumination apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp non-lighting detecting device for illumination appa ratus that detects abnormality of the lamp regardless of the wattage of the lamp and facilitates maintenance works by identifying the factors of abnormal ity. SOLUTION: This lamp non-lighting detecting device for illumination apparatus that is installed on an illumination apparatus body or its column and monitors lighting state of a discharge lamp, comprises a current detecting circuit 10 for reading the lamp current, a current storing circuit 11 that reads the lamp current at the initial stage of lighting by the current detecting circuit and stores the value as a lamp current reference value, and a judgement circuit 12 that establishes a lamp current normal range computed with the above lamp current reference value as a central point, and compares the current value having been read with the above lamp current normal range and judges as normal when it is in the normal range and judges as abnormal when it is outside the normal range, and identifies the abnormal factors when it judges as abnormal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a lamp spot detecting device for a lighting fixture, and more particularly to an improvement in a lamp spot detecting device for a lighting fixture such as a road light and a street light.

[0002]

2. Description of the Related Art Conventionally, a lamp fault detecting device for a luminaire uses, for example, a window comparator to set a lower limit reference value and an upper limit reference value corresponding to a lamp current in advance, and to measure the measured current value with the lower limit reference value and the upper limit reference value. If it is within the reference value range, it outputs a normal signal, and if it is less than the lower reference value or exceeds the upper reference value, it outputs an abnormal signal.

[0003]

However, in the determination of the measured current value as described above, the current value differs depending on the wattage of the lamp, and the lower reference value and the upper reference value differ for each type of lamp used. There is a problem that a device is required and the number of models of the device increases. In addition, when it is determined that an abnormality has occurred, there has been a problem that the cause of the abnormality cannot be determined. Further, at the end of the life of the lamp, a blinking cycle occurs in which the lamp is turned off due to a rise in lamp voltage and turned on again when the lamp cools down. However, there has been a problem that this abnormality cannot be detected only by measuring the current value.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and is a lamp for a lighting fixture which can easily perform maintenance work by detecting an abnormality of a lamp regardless of a wattage of the lamp and specifying a cause of the abnormality. It is an object of the present invention to provide a fault detection device.

[0005]

Means for Solving the Problems The present invention has the following arrangement to solve the above-mentioned problems. The invention described in claim 1 is
A lamp spot detection device for a lighting fixture installed on a lighting fixture main body or its support and monitoring a lighting state of a discharge lamp, wherein a current detection circuit for reading a lamp current, and a lamp current in an initial lighting period by the current detection circuit. A current storage circuit that reads the value and stores the value as a lamp current reference value, and sets a normal lamp current range calculated using the lamp current reference value as a center value, and stores the normal lamp current range and the read current value. And a determination circuit for determining a normal when it is within a normal range, determining an abnormality when out of the normal range, and identifying a cause of the abnormality when determining an abnormality.

According to the lamp fault detecting device for a lighting fixture according to the first aspect of the present invention, it is possible to detect a fault in the lamp regardless of the wattage of the lamp and to specify a cause of the fault. Of the lamp can be determined, and the defective lamp can be dealt with.

According to a second aspect of the present invention, there is provided the lamp fault detecting device for a lighting apparatus according to the first aspect, wherein the ballast calculated from the lamp current reference value by the determination circuit is secondarily short-circuited. When the normal range of the current is set and the lamp current value read by the current detection circuit is determined to be abnormal by the determination circuit, the secondary side of the ballast is short-circuited for a predetermined time, and the determination is performed. The circuit compares the current read when the ballast read by the current detection circuit is secondary-short-circuited with the normal current range when the ballast is secondary-short-circuited, and determines that the lamp is abnormal when within the normal range. It has a secondary short circuit that determines that the ballast is abnormal when it falls outside the normal range.

According to the lamp fault detecting device for a lighting apparatus of the present invention, it is determined whether the ballast is normal or abnormal by short-circuiting the secondary side of the ballast. If it is abnormal, it can be specified as a ballast failure.

According to a third aspect of the present invention, in the lamp fault detecting device for a lighting device according to the first or second aspect, when the lamp repeats blinking, the lamp is read by the current detecting circuit by the determination circuit. A lamp blink detection circuit that compares the lamp current with the normal lamp current range and determines that the lamp is abnormal when the number of repetitions outside the normal lamp current range and outside the normal range exceeds a predetermined number of times. It is configured.

According to the lamp fault detecting device for a lighting fixture according to the third aspect, there is a phenomenon in which the lamp voltage rises at the end of the life of the lamp. Therefore, the turned-on lamp is turned off immediately, and is turned on again when cooled. A blink cycle occurs. When the number of blinks exceeds a predetermined number, a lamp abnormality can be determined.

According to a fourth aspect of the present invention, there is provided a current detection circuit for converting a detected lamp current of a discharge lamp into an analog signal, a current storage circuit for storing a current at the beginning of lamp operation, and determining whether the lamp is normal or abnormal. A secondary short-circuit circuit for short-circuiting the secondary side of the ballast and / or a lamp blink detection circuit for detecting the number of times the lamp blinks, and a power supply for the secondary side of the automatic blinker. A DC power supply circuit, a DC detection circuit that captures the DC voltage of the DC power supply circuit, a delay circuit that delays the DC voltage signal from the detection circuit and inputs the signal to the determination circuit, and a determination signal determined by the determination circuit. And an output circuit for outputting the same.

According to the lamp fault detecting circuit for a lighting apparatus according to the present invention, the fault of the lamp can be detected and the cause of the fault can be specified regardless of the wattage of the lamp. Of the lamp can be determined, and the defective lamp can be dealt with.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing a configuration of a lamp fault detection device for a lighting fixture according to the present invention. In FIG. 1, reference numeral 1 denotes a power source, 2 denotes an automatic flasher, 3 denotes a ballast, and 4 denotes a light source, which is connected to the power source via the automatic flasher 2 and the ballast 3. Reference numeral 5 denotes a lamp fault detecting device which is configured to take in the lamp current IL of the light source 4 and the secondary output V2 of the blinker to determine the fault of the lamp and output a signal. The lamp light spot detecting device for a lighting device is installed, for example, in a column supporting a road light or in a road light device main body.

FIG. 2 is a block diagram of the lamp fault detecting device 5. In FIG. 2, reference numeral 10 denotes a current detection circuit,
The circuit converts the lamp current IL into an analog signal. A current storage circuit 11 stores an initial lamp current value. Reference numeral 12 denotes a determination circuit, and the converted analog signal is input to the current storage circuit 11 and the determination circuit 12. The initial lamp current value is taken into the determination circuit 12 and used as a reference lamp current value ILM. Further, the lamp current IL input to the determination circuit 12 is compared with the reference lamp current value ILM in the determination circuit 12 to determine whether the lamp current is normal or abnormal.

Reference numeral 13 denotes a DC power supply circuit, which is used as a circuit power supply for converting an AC voltage of the secondary output V2 of the blinker into a DC voltage and supplying the DC voltage DC to each circuit of the fault detection device 5. The DC voltage DC of the DC power supply circuit 13 is D
The signal is input to the C detection circuit 14 and is taken into the determination circuit 12 via the delay circuit 17. DC voltage DC is the judgment circuit 12
, The determination circuit 12 starts operating. When the determination circuit 12 determines that the signal is normal, the output circuit 15 outputs a normal signal.

Reference numeral 16 denotes a secondary short circuit, which short-circuits the secondary side (lamp side) of the ballast 3. If the determination circuit 12 determines that there is an abnormality, the secondary short circuit 16 operates and the secondary side of the ballast 3 is short-circuited. When the secondary side of the ballast 3 is short-circuited, the secondary short-circuit current of the ballast 3
After being input to and converted into an analog signal, the determination circuit 1
2 is input. The reference lamp current value I
A secondary short-circuit reference current value ILMS based on LM is created. The secondary short-circuit current value input to the determination circuit 12 is compared with the secondary short-circuit reference current value ILMS, and normal or abnormal determination is performed. If the secondary short-circuit current value is determined to be normal, a lamp failure signal is output from the output circuit 15. If the secondary short-circuit current value is determined to be abnormal, a signal indicating a ballast failure is output from the output circuit 15.

The delay circuit 17 is a circuit that causes the determination circuit 12 to rise later than the DC voltage DC of the DC power supply circuit 13 rises as a circuit power supply.

FIG. 3 is a detailed view of the secondary short circuit 16 of the ballast 3. In FIG. 3, reference numeral 20 denotes a contact of the secondary short-circuit relay, and reference numeral 21 denotes a coil of the relay.

When the determination circuit 12 determines that an abnormality has occurred, an ON signal is input to the coil 21, the contact 20 is turned on, and the secondary side of the ballast 3 is short-circuited. When the secondary short-circuit current is detected by the current detection circuit 10 and input to the determination circuit 12 for determination, the ON signal input to the coil 21 is cut off, the contact 20 is opened, and the secondary short-circuit is released. .

The lamp fault detecting device for a lighting fixture is installed, for example, in a column supporting a road light or in a street light. When a lamp fault monitoring system for monitoring lamp fault information at a management center is constructed. , Causing the installed lamp fault detection device to store an address that specifies the road light,
By simultaneously transmitting the lamp fault data and the address data to the management center, the faulty road light can be specified, and maintenance management becomes easy.

Reference numeral 18 denotes a lamp flicker detection circuit. At the end of the life of the lamp, the lamp starts to turn on due to a rise in the lamp voltage, but immediately goes out, and when the lamp cools down, a flashing phenomenon occurs. However, there is a circuit for counting the number of blinks.

In this case, the lamp current value is input to the current detection circuit 10 at the time of lighting due to the lamp blinking phenomenon.
It is not input when the light is off. This phenomenon is taken into the decision circuit 12. The determination circuit 12 determines that there is no lamp failure when, for example, the lamp is turned off for one hour or more. The reason for this is that, even though the light is normally normal, if the light is temporarily turned off by irradiation of, for example, a headlight of a car, it is not determined that there is no fault. However, in the lamp blinking phenomenon, the time from the start of lighting to the extinguishing of the lamp to the start of lighting again is, for example, about 30 minutes. Is not satisfied, the lamp blinking detection circuit 18 counts the number of times of blinking, and the determination circuit 12 determines that the lamp is defective when, for example, six times are counted overnight.

[0023]

According to the first aspect of the present invention, the abnormality of the lamp can be detected and the cause of the abnormality can be specified irrespective of the wattage of the lamp. Thus, there is a special effect that it is possible to provide a lamp spot detecting device for a lighting fixture in which maintenance work can be easily performed by judging whether the lamp is defective.

According to the second aspect of the present invention, it is determined whether the ballast is normal or abnormal by short-circuiting the secondary side of the ballast. There is a special effect that it is possible to provide a lamp defect detection device for a lighting fixture that can specify a lamp failure and specify the cause of the defect.

According to the third aspect of the invention, there is a phenomenon in which the lamp voltage rises at the end of the life of the lamp. Therefore, a flashing cycle occurs in which the lit lamp is turned off immediately, and then turned on again when cooled. There is a special effect that it is possible to provide a lamp fault detecting device for a lighting fixture that can determine that a lamp is abnormal when the number of times of blinking exceeds a predetermined number.

According to the fourth aspect of the present invention, the abnormality of the lamp can be detected and the cause of the abnormality can be specified regardless of the wattage of the lamp. There is a special effect that it is possible to provide a lamp fault detection circuit for a lighting fixture that can cope with the fault described above.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a relation between a lamp insufficiency detecting device for a lighting fixture, a ballast, and a lamp according to an embodiment of the present invention.

FIG. 2 is a circuit block diagram of the lamp fault detection device shown in FIG.

FIG. 3 is a detailed view of a ballast secondary short circuit of the lamp failure detecting device shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Power supply 2 Automatic blinker 3 Ballast 4 Light source 5 Lamp fault detection device 10 Current detection circuit 11 Current storage circuit 12 Judgment circuit 13 DC power supply circuit 14 DC detection circuit 15 Output circuit 16 Secondary short circuit 17 Delay circuit 18 Lamp blinking Detection circuit 20 Contact 21 Coil

Claims (4)

[Claims] 1. A lamp fault detecting device for a lighting fixture installed on a lighting fixture main body or a support thereof and monitoring a lighting state of a discharge lamp, comprising: a current detection circuit for reading a lamp current;
The current detection circuit reads a lamp current at the initial lighting time, and stores a current value as a lamp current reference value. A determination circuit that compares the normal current range with the read current value, determines that the current is within the normal range, determines that the current is out of the normal range, determines that the current is abnormal, and specifies the cause of the abnormality when determined that the current is abnormal. And a lamp fault detecting device for a lighting fixture. 2. The lamp fault detecting device for a lighting fixture according to claim 1, wherein a normal range of a current when the ballast calculated by the determination circuit from the lamp current reference value is secondarily short-circuited is set. When the lamp current value read by the current detection circuit is determined to be abnormal by the determination circuit, the secondary side of the ballast is short-circuited for a predetermined period of time, and the determination circuit performs a short circuit on the current detection circuit. The current when the read ballast is secondary short-circuited is compared with the normal current range when the ballast is secondary short-circuited. If it is within the normal range, it is determined that the lamp is abnormal. A road lighting lamp non-lighting detection device, comprising a secondary short circuit for judging that a lamp is abnormal. 3. The lamp fault detecting device for a lighting fixture according to claim 1, wherein when the lamp repeats blinking, the lamp current read by the current detecting circuit by the determination circuit and the lamp current. Compare with normal range,
A lamp flicker detecting circuit for a lighting fixture, comprising: a lamp flicker detection circuit that determines that a lamp is abnormal when the number of repetitions outside the normal range of the lamp current and outside the normal range exceeds a predetermined number. A current detection circuit for converting a detected lamp current of the discharge lamp into an analog signal; a current storage circuit for storing a current at an initial stage of lamp lighting; and a determination circuit for determining whether the lamp is normal or abnormal. A DC short-circuit circuit for short-circuiting the secondary side of the ballast and / or a lamp flicker detection circuit for detecting the number of times the lamp blinks; and a DC power supply circuit using the secondary side of the automatic flicker as a power source; A DC detection circuit that captures the DC voltage of the DC power supply circuit, a delay circuit that delays the DC voltage signal from the detection circuit and inputs the DC voltage signal to the determination circuit, and an output circuit that outputs a determination signal by the determination of the determination circuit. A lamp fault detection circuit for lighting equipment, comprising: