JPH0560819A - Waveform analyzer and lamp abnormality detecting device for constant-current adjuster - Google Patents

Abstract

PURPOSE:To obtain a waveform analyzer and lamp abnormality detecting device for constant-current adjusters which can precisely discriminate the status of constant-current adjusters. CONSTITUTION:Waveforms appearing on the secondary winding 8 side of a transformer 6 are collected. Whether or not the waveform in the comparing section exceed a threshold obtained by adding a prescribed value in parallel to the waveform in the comparing section is discriminated and such discrimination is repeated until a set section is completed. When the waveform exceeds the threshold, an abnormality discrimination circuit 20 discriminates the abnormality. At the time of discriminating the abnormality, whether or not the wick is excessively cut and whether or not arcs are abnormal are discriminated. The threshold can be increased or decreased and can be set at the optimum value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waveform analyzing device and a lamp abnormality detecting device for a constant current regulator in which a lamp is connected to a secondary winding and primary windings of a plurality of transformers are connected in series.

[0002]

2. Description of the Related Art Conventionally, for example, in a lamp such as an entrance light of an airport, a primary winding of a transformer is connected in series with a constant current regulator and a secondary winding of the transformer is connected. Even if one of the lamps is disconnected, the other lamps are not turned off. For this reason, it is difficult to notice even when some of the lamps are off, and the confirmation of disconnection and the arc determination are visually confirmed by, for example, an oscilloscope. That is, if the lamp has many disconnections, it does not have a function as an entrance lamp, and if an arc occurs, there is a high possibility that contact failure occurs.

[0003]

However, it is very difficult to always confirm the waveform with an oscilloscope or the like, and it is easy to overlook a sudden occurrence.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a waveform analysis device of a constant current regulator and a lamp abnormality detection device capable of properly determining the state.

[0005]

According to a first aspect of the present invention, there is provided a waveform analyzing apparatus for a constant current regulator, comprising: a primary winding of a transformer in which a constant current regulator is connected in series and a secondary winding is connected to a lamp. Waveform collection circuit that collects the waveform of the waveform, an abnormality determination circuit that determines the abnormality of the waveform detected by the waveform collection circuit, a reference waveform storage unit that stores the reference waveform in advance, and the waveform collection circuit that collects the waveform. The waveform in the predetermined section is compared with a threshold waveform obtained by adding a predetermined value to the waveform stored in the reference waveform storage unit, and when the waveform from the waveform collection circuit exceeds the threshold waveform, the abnormality determination circuit is determined to be abnormal. And an abnormality determination starting circuit for making a determination.

According to a second aspect of the present invention, there is provided the constant current regulator waveform analyzing apparatus according to the first aspect, wherein the abnormality determining circuit has a predetermined value that can be varied and a threshold waveform that can be varied vertically. Is what is.

According to a third aspect of the present invention, there is provided the constant current regulator waveform analyzing apparatus according to the first or second aspect, wherein the threshold value is set to an optimum value.

According to a fourth aspect of the present invention, there is provided the lamp abnormality detecting device using the waveform analyzing device of the constant current regulator according to the first aspect, wherein the abnormality determining circuit detects an abnormality of the lamp.

[0009]

In the waveform analyzing device of the constant current regulator according to claim 1, the waveform of the predetermined section collected by the waveform collecting circuit in the abnormality determination starting circuit is added with a predetermined value to the waveform stored in the reference waveform storage section. Compared with the threshold waveform, when the waveform from the waveform collection circuit exceeds the threshold waveform, the abnormality determination circuit determines the abnormality, so that the abnormality can be accurately detected.

According to a second aspect of the present invention, there is provided the constant current regulator waveform analyzing apparatus according to the first aspect, wherein the abnormality determining circuit has a predetermined value that can be changed and a threshold waveform that can be changed up and down. Therefore, the abnormality can be accurately detected in the optimum state.

According to a third aspect of the present invention, there is provided a waveform analyzing apparatus for a constant current regulator according to the first or second aspect, wherein the threshold value is set to an optimum value. The abnormality can be detected accurately.

In the lamp abnormality detecting device according to the fourth aspect, since the abnormality determining circuit uses the waveform analyzing device of the constant current regulator according to the first aspect, the abnormality detecting circuit accurately detects the lamp abnormality. be able to.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings using a system such as an entrance light at an airport.

In FIG. 1, reference numeral 1 is a commercial AC power supply, and this commercial AC power supply 1 is a constant current regulator (Constant Current R).
egulator) 2 is connected. This constant current regulator 2
The bypass coil 5 is connected in parallel to the anti-parallel connected thyristors 3 and 4, and is connected to the primary winding 7 of the transformer 6. The phase control circuit 9 is connected to the gates of the thyristors 3 and 4.
Receives feedback from a current transformer 10 provided on the secondary winding 8 side of the transformer 6.

The primary winding 11a of the plurality of transformers 11 is connected in series to the secondary winding 8 of the transformer 6,
The lamp 12 is connected to 11b.

Reference numeral 14 is a waveform collecting circuit, which is connected to the secondary winding 15b of the transformer 15 on the primary winding 7 side of the transformer 6 and to the primary winding 7 side. Primary winding
It is designed to collect voltage waveforms from 15a.

Further, a microcomputer 16 is connected to the waveform acquisition circuit 14. A control unit 17 is provided in the microcomputer 16, and an abnormality determination starting circuit 1 for determining the trigger of the waveform abnormality from the waveform collection circuit 14
8. Comparison level storage circuit 19 and abnormality determination start circuit 18 as a reference waveform storage circuit for storing a reference reference waveform
Abnormality judgment circuit 20 for judging an abnormality in the waveform activated by
Is provided. The abnormality determination circuit 20 is provided with a bypass. Further, a display 21 and a keyboard 21 are connected to the abnormality determination circuit 20.

Next, the operation of the above embodiment will be described.

The power from the commercial AC power supply 1 is phase-controlled by the thyristors 3 and 4, the power is induced in the secondary winding 8 of the transformer 6, and is supplied to the primary winding 11a of each transformer 11, The lamp 12 connected to the secondary winding 11b is turned on.
In addition, the current transformer 10 detects the current flowing in the secondary winding 8 of the transformer 6 and feeds it back, and controls the thyristors 3 and 4 according to the detected current so that the current of the secondary winding of the transformer 6 is controlled. To a constant current. Further, the coil 5 allows a bypass current to flow from the zero crossing until the thyristor 3 or the thyristor 4 is ignited so that the current flowing through the secondary winding 8 of the transformer 6 is continuous.

Further, even if one of the lamps 12 is disconnected, the transformer 11 is saturated and a current flows through the primary winding 11a, so that the other normal lamps 12 are not turned off.

Then, the voltage waveform of the primary winding 7 of the transformer 11 is detected by the primary winding 15a of the transformer 15, and the waveform collecting circuit
The waveform is collected at 14, and the waveform is input to the microcomputer 16.

The comparison level reference circuit 19 stores the basic waveform shown in FIG. 2 in advance and sets a threshold value for this basic waveform.

As shown in FIG. 4, the secondary winding 8 of the transformer 6
The side waveform is collected (step 1). Then, it is determined whether or not the waveform of the predetermined section which is the comparison section exceeds the threshold value (step 2), and the process is repeated until the set section ends (step 3). If the threshold value is exceeded in step 2 as shown in FIG. 3, abnormality determination is performed (step 4).

In this abnormality determination, over-core and arc determination are performed.

In the over-judgment core judgment, the lamp 12 short-circuits the secondary winding 11b of the transformer 11 during normal operation, so the impedance seen from the primary winding 11a side of the transformer 11 becomes high and the thyristor 3 and When all of the thyristors 4 are in the non-conducting state, that is, from the zero cross to the ignition point, a substantially linear waveform is shown as shown in FIG. However, when many of the lamps 12 are disconnected, the impedance decreases as seen from the primary winding 11a side of each transformer 11, and the overall impedance, especially the inductance, decreases. From to the ignition point, the waveform becomes a bulging waveform like a CR time constant circuit.

Therefore, the area from the zero cross of the waveform collected by the waveform collecting circuit 14 to the firing point is calculated, and the calculated area and the area from the zero cross of the stored waveform to the firing point are calculated. If the calculated area is equal to or less than the allowable range, it is determined that the core is not excessively broken, that is, the number of cores of the lamp 12 is small.

In the arc determination, no arc is generated in the normal state, but if a connection failure occurs, a sawtooth wave pulse is generated by the arc. It is determined whether the number of times the threshold is exceeded is a predetermined number or more. If the number of times the threshold is exceeded is less than a predetermined value, it is determined that it is not an arc, and if the number of times the threshold is exceeded is a predetermined number or more, it is determined to be an arc.

The threshold value can be changed up and down, and may be set to an optimum value based on experimental results, empirical rules, and the like.

Further, according to the above embodiment, the abnormality determination circuit
20 operation time can be shortened, so a microcomputer
16 can be used effectively.

[0030]

According to the waveform analyzing apparatus of the constant current regulator of the first aspect, the waveform of the predetermined section collected by the waveform collecting circuit in the abnormality determination starting circuit is set to the waveform stored in the reference waveform storage unit. Since the abnormality determination circuit determines the abnormality when the waveform from the waveform collection circuit exceeds the threshold waveform by comparing with the threshold waveform to which a value is added, the abnormality can be accurately detected.

According to the waveform analyzing device of the constant current regulator of the second aspect, in addition to the waveform analyzing device of the constant current regulator of the first aspect, the predetermined value of the abnormality judging circuit is variable and the threshold waveform is up and down. Since it can be changed to, the abnormality can be detected accurately in the optimum state.

According to the waveform analyzing apparatus of the constant current regulator of the third aspect, in addition to the waveform analyzing apparatus of the constant current regulator of the first or second aspect, the threshold value is set to the optimum value, and therefore the optimum value is obtained. Under this condition, the abnormality can be accurately detected.

According to the lamp abnormality detecting device of the fourth aspect, since the abnormality determining circuit detects the abnormality of the lamp, the waveform analyzing device of the constant current regulator according to the first aspect is used. Can be detected.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a waveform analysis device for a constant current regulator according to the present invention.

FIG. 2 is a waveform diagram showing a basic waveform of the same.

FIG. 3 is a waveform diagram showing a case where the waveform collected above exceeds the basic waveform.

FIG. 4 is a flowchart showing a waveform collection and analysis operation of the same as above.

[Explanation of symbols]

 2 Constant current regulator (CCR) 11 Transformer 11a Primary winding 11b Secondary winding 12 Lamp 14 Waveform collection circuit 18 Abnormality judgment starting circuit 19 Comparison level storage circuit as reference waveform storage circuit

Claims (4)

[Claims] 1. A waveform collecting circuit for collecting a waveform from a primary winding of a transformer in which a constant current regulator is connected in series and a lamp is connected to a secondary winding, and a waveform detected by the waveform collecting circuit. An abnormality determination circuit for determining the abnormality of, a reference waveform storage unit that stores a reference waveform in advance, a waveform of a predetermined section collected by the waveform collection circuit, a predetermined value in the waveform stored in the reference waveform storage unit. And a threshold current waveform to which the above waveform is added, and an abnormality determination start circuit that causes the abnormality determination circuit to determine an abnormality when the waveform from the waveform collection circuit exceeds the threshold waveform. Waveform analyzer. 2. A predetermined value of the abnormality determination circuit is variable and a threshold waveform is variable up and down.
Waveform analysis device of the constant current regulator described. 3. The waveform analysis device for a constant current regulator according to claim 1, wherein the threshold value is set to an optimum value. 4. The lamp abnormality detecting device using the waveform analyzing device of the constant current regulator according to claim 1, wherein the abnormality determining circuit detects an abnormality of the lamp.