JPH04112492A - Lamp filament breakage detector - Google Patents

Abstract

PURPOSE:To provide a lamp filament breakage detector capable of detecting a particular lamp whose filament is broken out of a plurality of arranged lamps by counting a time from an instantaneous stopping time of an AC power source output to a detecting operation time of a filament breakage judging means to compare it with each judging time. CONSTITUTION:A master station 7 for controlling a constant current power source device 2 is provided with a filament breakage/abnormality generation judging portion 16, an AC power source control means, e.g. a power source controller 8, and a lamp judging means, e.g. a filament breakage position judging portion 9. The filament breakage/abnormality generation judging portion 16 is connected to an instrument AC device 3 and an instrument transformer 4, respectively. The filament breakage/abnormality generation judging portion 16 counts a time from an instantaneous stopping time of an AC power source output to a detecting operation time of the filament breakage judging means, to compare it with a judging time set individually for each lamp. Consequently, it is possible to determine not only in which of lamps L1, L2,..., Ln filament breakage is generated but also in which of terminals R1, R2,..., Rn abnormality is generated.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Field of Application) The present invention provides a lamp for detecting a break in each lamp connected to the secondary side of a plurality of insulation transformers connected in series. The present invention relates to a core breakage detection device.

(Prior Art) A series light lighting circuit is generally used to light a large number of lights used for approach guidance of an airport runway. This series lamp lighting circuit is provided with a lamp breakage detection device that detects when any one of the plurality of lamps is broken.

FIG. 6 is a block diagram showing the configuration of the conventional lamp breakage detection device described above.

In FIG. 6, the constant current power supply device 2 supplies a constant current output to the series lighting circuit 66 by controlling the phase of the power supplied from the AC power supply 1. The series lighting circuit 66 includes an isolation transformer CT whose negative side is connected in series,
CT, . . . , CT□ are white, and these isolation transformers CT, CT2 . . . . Controls the lighting of the lights L i , L 2 , . . . , L connected to the secondary side of CT, respectively. The light, L2゜L is
are output from the constant current power supply device 2, respectively, and connected to the isolation transformer CT.
, CT2. . . , the brightness is maintained constant by the current supplied through the CT.

The core disconnection detection unit 65 detects the core disconnection of the above-mentioned light, L2°L, from a change in the electric signal manually inputted through the instrument current transformer 63 and the instrument transformer 64.

Here, the process of detecting a core break in a light by the core break detection unit 65 will be described. The light L1 illustrated in FIG. L
2. ..., Lo is disconnected, the secondary side of the insulation transformer to which the disconnected lamp is connected becomes open. When the secondary side of the isolation transformer becomes open, the load impedance seen from the constant current power supply 2 that is supplying current to the disconnected lamp changes. As the load impedance seen from the constant current power supply device 2 changes in this way, the output voltage waveform and output current waveform of the constant current power supply device 2 become as shown in FIG. 7. The principle of detecting the breakage of the lamp in this case is described, for example, in Japanese Patent Publication No. 15556/1983.

When the secondary side of the isolation transformer becomes open due to a break in the light, a magnetic saturation phenomenon occurs, and the output current of the constant current power supply 2 rises slowly until the isolation transformer reaches magnetic saturation. This results in a waveform that rises later than when there is no core breakage in the light. On the other hand, when looking at the output voltage of the constant current power supply device 2, the waveform rises steeply while the rise of the output current is delayed (saturation time α, α is also the phase control angle). At this time, the time integral value m12m2 of the voltage waveform corresponds to the area of the hatched portion. ...9mn is proportional to the number of broken lamps, as is clear from FIG. Here, the time integral value when one light is broken is expressed as ml, so if the time integral value obtained by the breakage detection section 65 is m3, the number of broken lights is It turns out that there are 3 pieces.

(Problem to be solved by the invention) By the way, the conventional lamp breakage detection device having the above-mentioned configuration has the following problems:
Is it possible to detect the occurrence of core breakage in a light and the number of lights in which core breakage has occurred? Lights Lt, L2
, ..., detecting which part of Ln has a core breakage,
It is impossible to judge.

Therefore, the core breakage detection unit 65 detects that the lights Ll, L2
．． ..., If a breakage occurs in one of the Lo lights, workers must patrol the airport runway to find the broken light, which reduces the efficiency of maintenance and inspection work. There is a problem that it is bad.

Additionally, if the replacement of a broken light is delayed, the secondary side of the insulation transformer to which the broken light is connected will be left open for a long time, resulting in high There are also problems in that short circuits between windings may occur due to voltage, and windings may burn out due to temperature rise.

Therefore, in order to solve the above-mentioned problems, a lamp breakage detection device having a structure as shown in FIGS. 9 and 10 was proposed. The outline of the light core breakage detection device according to the above proposal is as follows.

That is, assuming that the lamp L1 is broken in FIGS. 9 and 10 above, the overvoltage generated on the secondary side of the isolation transformer CT i is detected by the overvoltage detection section 2. Upon this detection, the short circuit control section 23 controls the thyristor section 22 to short-circuit the secondary side of the insulation transformer CT, so that the breakage of the lamp L1 is not detected by the breakage occurrence determination section 6.

When the power supply control unit 8 of the master station 7 instantaneously stops the constant current power supply 2 connected to the AC power supply 1, the
As shown by the dotted line in the figure, the output current (Figure 11 (a)) and output voltage (Figure 11 (b)) from the constant current power supply device 2
Or become O. Terminal R indicates that this momentary stop has taken place.
1, the short circuit control section 23 sets the time setting section 24 based on the detection.
After the set time t has elapsed, the Cyrisk part 2
The short circuit caused by 2 is released for a time T as shown in FIG. 11(d). When the short circuit is removed, there will be a change in the output voltage waveform (Fig. 11(b)) due to the disconnection of the lamp L1. The occurrence determining unit 6 detects this change using the above-mentioned time integration method, determines that a core break has occurred, and notifies the master station 7 of the change. Based on this notification, the breakage position determination section 9 of the master station 7 calculates the time from the time when the power supply control section 8 instantaneously stops until the time when the breakage occurrence determination section 6 detects a breakage. Then, the determined time and the pre-stored judgment time t1 for each light. t2. . . t is matched, and if it matches tl, it is determined that the light L1 is broken. In addition, in FIG. 12, a lamp current disconnection detection unit 42 detects that the current flowing through the lamp L1 is interrupted due to the occurrence of a core breakage through a current transformer 41 connected in series with the lamp L1. The terminal section RR1 of the configuration is shown. It is completely the same as the terminal portion R1 shown in FIG. 10 described above, except that the occurrence of core breakage is detected as described above.

By using the light breakage detection device having the above configuration, when a break occurs in one of the plurality of lights, the broken light can be detected, and a terminal provided for each light can detect the broken light. When an abnormality occurs in any of the parts, it is now possible to detect the terminal part where the abnormality has occurred.

However, the lamp breakage detection device having the above configuration does not predict that an abnormality will occur in each terminal portion R1 to Rn, and therefore, when an abnormality occurs in each terminal portion R1 to Rn, each short circuit control portion 23 No countermeasures have been taken in the event that the system stops working.

Therefore, when any of the above-mentioned terminal parts R1 to Ro becomes abnormal, the core breakage occurrence determination section 6
It is not possible to detect the abnormality that occurs in ~Rn. or,
Since it is assumed that each terminal part R1 to Rn is always normal, even if any of the lights L1 to L is broken, the short-circuit control part 23 of the corresponding end wood part will switch the secondary side of the isolation transformer off. Since short circuits are bound to occur, there is no possibility that the time integral value of the voltage waveform determined by the disconnection occurrence determining section 6 would always show a high value due to an abnormality occurring in the terminal section corresponding to the disconnected lamp. Not predicted.

Therefore, for example, assuming that the light L1 is broken and the terminal portion R1 becomes abnormal, the breakage position determination unit 9 cannot detect the breakage of the light L1, and the breakage occurrence determination unit 6 Since the time-integrated value of the voltage waveform when none of the lights L1 to Ln are broken is used as the criterion for determining whether or not a break has occurred, it is possible to determine whether the remaining terminals are normal and whether any of the remaining lights are broken. When this occurs, there is a problem in that it becomes impossible to detect the light in which the core breakage has occurred.

An object of the present invention is that even if one of the plurality of lights is broken and an abnormality occurs in the corresponding terminal, when any of the lights corresponding to other normal terminals is broken, An object of the present invention is to provide a light wick detection device capable of detecting the pressure of a wicked light.

[Structure of the invention]

(Means for solving the problem) In order to achieve the above object, the present invention has a light lighting circuit on the secondary side of two or more transformers connected in series to a constant current type AC power source. A light breakage detection device for a series lighting circuit includes: AC power supply control means for controlling the output of the AC power supply to be instantaneously stopped for a set time within a range that does not impede lighting of each of the lights; , open state detection means for detecting that the secondary side of the corresponding transformer has become open state, and an open state detection means provided for each light, which short-circuits the secondary side of the transformer upon detection of the open state of the secondary side of the transformer. When there is a momentary stop of the AC power output after
A short-circuit control means that releases the short-circuit for a certain period of time after a preset judgment time has elapsed; and a short-circuit control means that sequentially inputs the pulsed voltage value of the output of the AC power supply, and outputs this voltage value and a predetermined value before the input point of this voltage value. a core breakage determination means that compares a light core breakage determination reference value determined from a voltage value input during a period, and determines that a core breakage has occurred if the difference between the two is larger than a predetermined range; and a determination that differs for each of the lights. Each time is set,
Counting the time from the instantaneous stop of the AC power output to the detection operation time of the core breakage determination means, and comparing this with each of the determination times, and determining a light whose determination time is set to match the counted time. The present invention has a configuration including a light discrimination means for determining the light.

(Function) In the above configuration, the AC power supply control means performs control to instantaneously stop the output of the AC power supply for a set time within a range that does not interfere with lighting of each light, and the open state detection means
It is provided for each light and detects when the secondary side of the corresponding transformer is open. The short-circuit control means is provided for each light, and when the open state of the secondary side of the transformer is detected and the output of the AC power source is momentarily stopped after the secondary side of the transformer is short-circuited, the short-circuit control means is installed in advance. After the set determination time has elapsed, the short circuit is released for a certain period of time. The core breakage determination means sequentially inputs the pulsed voltage values of the output of the AC power supply, and determines a lamp core breakage determination criterion based on the voltage values and the voltage values input during a predetermined period before the input of the voltage values. $ value, and if the difference between the two is larger than the expected range, it is determined that a core break has occurred.Furthermore, the light discrimination means has a different judgment time set for each light, and the AC power output We decided to count the time from the moment of instantaneous stop to the point of detection operation of the breakage determination means, compare this with each determination time, and determine which lights have a determination time that matches this counted time. Even if one of the lights is broken and an abnormality occurs in the corresponding terminal, the broken light can be detected when any of the lights corresponding to other normal terminals is broken. became possible.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

As is clear from the above description, the light breakage detection device according to the present invention is generally applied to a series light lighting circuit for lighting a large number of lights used for approach guidance of an airport runway. Then, it is detected that any one of the many lights is broken.

FIG. 1 is a block diagram showing the configuration of a lamp breakage detection device according to an embodiment of the present invention.

In FIG. 1, a constant current type AC power source, for example, a constant current power supply device 2 supplies a constant current output to a series lighting circuit 5 by controlling the phase of the power supplied from an AC power source 1. The series lighting circuit 5 is an isolation transformer CTt whose negative side is connected in series.

Cr2. ..., CTn, and these isolation transformers CT, Cr2 . . . are connected in series. . . , lights L1 . . . connected to the secondary side of CTo, respectively. L2. . . . controls the lighting of Ln. Light L1. L2. ..., Ln are output from the constant current power supply device 2, respectively, and are connected to the isolation transformers CT, CT2.
．． ..., the brightness is maintained constant by the current supplied through CTo.

Each of the lights L1. L2. ..., Lo each has a terminal section R.
1, R2, . . . , Rn are provided. Terminal part R1
, R2, . . . , Ro have the same internal configuration, and the internal configuration is as shown in FIG. Each of the above-mentioned terminal units R,, R2,...
The details of the configuration of . . , Ro will be explained in detail later using FIG. 2.

The device shown in FIG. 1 further includes the constant current power supply device 2.
A master station 7 that detects the output from the constant current power supply device 2 and controls the constant current power supply device 2 is connected to the output side of the constant current power supply device 2 . The master station 7 includes core breakage determining means, such as a core breakage/abnormality occurrence determining section 16, and AC power supply control means, such as a power supply control section 8.
and a light discriminating means, such as a core breakage position determining section 9.

The core breakage/abnormality occurrence determining section 16 is connected to the instrument current transformer 3 and the instrument transformer 4, respectively. The core breakage/abnormality occurrence determination section 16 detects the light, L2. ..., L
This not only determines whether or not a core break has occurred in any of □, but also determines whether or not an abnormality has occurred in any of the terminal parts R,, R2, ..., Ro. . Core break/
As shown in FIG. 1, the abnormality occurrence determination unit 16 includes a voltage waveform counting unit 10, a reference value automatic setting unit 11, a core breakage determination unit 14, a current waveform counting unit] 2, and a reference value setting unit for each tap. 13 and a system abnormality determining section 15.

The voltage waveform counting section 10 inputs the output voltage of the constant current power supply device 2 through the instrument transformer 4, calculates a time integral value of the output voltage waveform, and then converts the determined time integral value into a pulse. Then, this pulse signal is counted, and this count value C
v is output to the reference value automatic setting section 11 and core breakage determination section 14, respectively. Reference value automatic setting section 11
is the above numerical value C output from the voltage waveform counting section 10
is read and monitored for a certain period of time. Then, it is checked in the order of input whether the count value C input during the certain period is within a preset certain range: ±K,
When the checked count value C exceeds the predetermined range ±K, (1) Update the count value C held up to then to the count value Cv. On the other hand, if the checked count value C does not exceed the above range, the count value C is not updated. Then, the count value C held at the end of the above cycle is set to the voltage waveform count value 2C6 when there is no broken lamp (or when there is one). Further, an appropriate light core detection device: C±K is set as a threshold value for determining the presence or absence of a core light, and the set reference value C+K is used for the core detection leg 14 and system abnormality determination. The signals are output to the section 15, respectively. The core breakage determination unit 14 inputs the lamp core breakage detection device =C± outputted from the reference value automatic setting unit 11 and the count value C outputted from the voltage waveform currant unit 10, and compares the two. do. Based on this comparison result, it is determined whether or not there is a broken light, and the result of the determination is notified to the broken core position determining section 9. As described above, in this embodiment, the reference value automatic setting unit 11 sets the core breakage determination reference value to 20±. However, instead of the above method, all the count values Cv input during a certain period are memorized, and at the end of this period, the average value of all the count values Cv stored up to that point is calculated. The core breakage determination reference value may be set based on the average value obtained.

The current waveform counting unit 12 inputs the output current of the constant current power supply device 2 through the instrument current transformer 3, calculates the time integral value of the output current waveform, and then converts the calculated time integral value into a pulse. Then, this pulse signal is counted, and this count value C
I is output to the reference value setting section 13 for each tap.

The tap-specific reference value setting section 13 includes a current waveform counter section 12
The above count value CI output from ■x It is designed to output to the foot section 15. The reason why the tap-specific reference value setting unit 13 performs the above processing is that in a constant current power supply device, the output current value is always set at each tap value for switching the brightness of each lamp L1 to L. This is because it takes advantage of the fact that it is controlled to a constant value and is not affected by the presence or absence of a broken light. The system abnormality determination unit 15 determines the voltage waveform count value C output from the tap-specific reference value setting unit 13.
, and give an appropriate range ±K to this read voltage waveform count value C. And ■× This is the system abnormality judgment standard value: C:! By comparing the abnormality determination reference value C± with the core breakage determination reference value C output from the reference value automatic setting unit ν Detects whether or not the That is, when the system is operating normally, the abnormality determination reference value C+ and the light core breakage determination reference value x C=! : The value is the same as that of , but when a broken light occurs and an abnormality occurs in the terminal corresponding to the broken light, and the short circuit control unit 23 stops operating, the constant current is changed as described above. Since the time integral value of the output voltage waveform of the power supply device 2 always shows a high value, the above-mentioned lamp breakage determination reference value: C: becomes a higher value.

The system abnormality determination unit 15 notifies the breakage position determination unit 9 of the determination result. The power supply control unit 8 in the master station 7 is
The output of the constant current power supply device 2 is controlled.

The power supply control unit 8 controls the lights L i , L 2 , .
・Irrespective of whether or not there is a light in which a core break has occurred in Lo, the light is transmitted at a fixed period (for example, for 10 minutes or less) based on the request signal sent from the core break position determination unit 9. (hereinafter referred to as "instantaneous stop") for a short period of, for example, one cycle or two cycles, which does not interfere with the lighting of the light.

By measuring this instantaneous stop time, the core breakage position determination unit 9 issues a request to determine whether or not the core is broken or each terminal portion R, R,
. . , not only determines whether it is a diagnosis request for diagnosing the normality/abnormality of the RN, but also preliminarily determines whether each of the lights L1. L2',...
A time period (hereinafter simply referred to as "determination time") for determining whether or not the light is a normal light having a different length for each Ln, t1t2. ..., tn is memorized. When determining the presence or absence of a broken core light, the broken core position determination unit 9 performs the following steps.
Light, L2. . . , Lo, the power supply control unit 8 detects the output fluctuation of the constant current power supply device 2 after the core breakage/abnormality determination unit 16 detects the output fluctuation of the constant current power supply device 2. The point in time when the output of is controlled is the reference point. Then, each of the lights L1. L2. . . , the counting time and the judgment time tx, t2 . . . are different for each Ln.・・・
・、t.

Make them correspond. As described above, the core breakage position determination unit 9 detects each of the lights, L2, . . . , each lamp Ll, L2 . ..., Ln is normal or not, and when it is recognized that there is a broken light as a result of this judgment, the position of the light where the broken core has occurred is detected. In addition, the core breakage position determination unit 9 diagnoses whether each of the terminal parts R1 to Rn is normal or abnormal in the same manner as described above, and detects the position of each terminal part R1 to Rn that is recognized as normal. ing.

Note that the above-mentioned determination time t1. t2,...
, t.

This will be explained in detail later.

FIG. 2 shows each terminal portion R1, illustrated in FIG. 1,
It is a block diagram showing the internal configuration of terminal unit R1 among R2, . . . , Ro. As described above, the internal configurations of the terminal units R,, R2, . . . , Ro are the same, so for convenience of explanation, only the internal configuration of the terminal unit R1 is illustrated.

In FIG. 2, on the secondary side of the isolation transformer CT i, an open state detection means, for example, an overvoltage detection section 21, and a short circuit control means, for example, a short circuit section 27 are provided in parallel with the above-mentioned light L1. A second switching means, for example, a thyristor unit 29 is also connected in series with the lamp L1. Further, a current interruption detection section 25 is connected to the secondary side of the isolation transformer CT through a current transformer 26. This current interruption detection section 25 is connected to the short circuit control section 23 of the short circuit section 27 . The overvoltage detection unit 21 detects when a high voltage is generated on the secondary side of the insulation transformer CT due to the disconnection of the light L1, and detects the short circuit forming the short circuit unit 27 through the delay circuit 31. It is designed to be output to the control section 23. The overvoltage detection unit 21 also detects a high voltage on the secondary side of the isolation transformer CT by opening the thyristor unit 29, which is normally closed, on the condition that the lamp L1 is normal. Even if this occurs, it is detected and the delay circuit 31
It is designed to output to the short circuit control section 23 through.

The overvoltage detection section 21 is set to have a high impedance so that no current flows from the secondary side of the isolation transformer CT1. The delay circuit 31 delays the output signal from the overvoltage detection section 21 by several cycles, and then outputs the signal to the short circuit control section 23 . The short-circuit section 27 includes the aforementioned short-circuit control section 23, a first switching means such as the thyrisk section 22, and a time setting section 24.

The thyristor section 22 is under the control of the short circuit control section 23,
The secondary side of the isolation transformer CT i is short-circuited.

When the current interruption detection section 25 detects through the current transformer 26 that the output of the power supply control section 8 or the constant current power supply device 2 has been momentarily stopped for a predetermined period of time, it outputs a predetermined detection signal to the short circuit control section 23. It is supposed to be done. Time setting section 2
4, a determination time t1 related to the light L1 is set. The time setting unit 24 sets the determination time [1 to the short circuit control unit 2
Output for 3. The short circuit control section 23 closes the thyristor section 22 on the condition that a predetermined overvoltage detection signal is output from the overvoltage detection section 21. When it receives a detection signal from the current disconnection detection unit 25 and recognizes that a request is made to detect the presence or absence of a break in the light from the pressure detection signal, it outputs a signal indicating a request to detect the presence or absence of a break in the light. The determination time t set in the time setting section 24 is set as the reference time.
The thyristor section 22 is controlled to short-circuit the secondary side of the isolation transformer CT until one period of time has elapsed. And the judgment time tj
After a predetermined period of time T has elapsed, the short circuit is released. Short circuit control section 2
3 also closes the cyrisk section 22 on the condition that a predetermined overvoltage detection signal is output from the overvoltage detection section 21. Then, upon receiving the detection signal from the current interruption detection section 25, if the detection signal is recognized as requesting diagnosis of normality/abnormality of each terminal section R1 to Ro, the terminal section is judged to be normal/abnormal. The determination time t set in the time setting section 24 with the time point at which the signal indicating the diagnosis request is output as the reference time point.
The thyristor section 22 is controlled to short-circuit the secondary side of the isolation transformer CT1 until 1 elapses. After that, judgment time t1
After a predetermined period of time T has elapsed, the short circuit is released. Short circuit control section 2
3 receives a detection signal from the current interruption detection unit 25 when the light L1 is normal, and recognizes that a diagnosis of the terminal unit is requested from the detection signal, and then determines the determination time t in the same way as above.
When 1 has elapsed, the sirisk section 29 is controlled to open the secondary side of the isolation transformer CT1 for a predetermined period of time. Here, if the time setting section 24 is explained in more detail, as is already clear from the above content, the short circuit control section 23 receives the output signal from the overvoltage detection section 21, and the thyristor section 22
After closing the circuit to create a short-circuited state, the current disconnection detection section 25
The determination time t1 from when the output signal from the thyristor unit 22 is received to when the operation of canceling the short circuit by the thyristor section 22 for a certain period of time T is executed can be set in advance. The determination time set in the time setting unit 24 is 11° for the terminal R and t2 for the terminal R2. ..., t for the terminal R0, and so on, each light, L2...,
Each L has a different length. In this embodiment, it is assumed that the relationship tl x t2 x <11 holds between the determination times 11, 12, . Also, t2>t1+T+T,, ta>t2+T+
Tx, −, to>t, −10T+Tx (here, Tx
is the recovery time of core breakage/abnormality shown in FIG. 11(c)). These will be described later.

Here, the operation of the core breakage/abnormality occurrence determining section 16 shown in FIG. 1 will be explained without reference to the flowchart shown in FIG. 4. The flowchart illustrated in FIG. 4 is such that the automatic reference value setting section 11 calculates the lamp breakage determination reference value C after counting the time integral value of the voltage waveform output as a pulse signal from the voltage waveform counting section 10 n times. This shows how to set it. That is, the reference value automatic setting section 11 first reads the above-mentioned time integral value output from the voltage waveform counting section 10. Here, the reference value automatic setting section 11
The value read is the value read the first time: from Cvl, the nth
The value to be read for the first time: a value between Cvn (these are collectively referred to as C) (step 101). Value C read in step 101
It is determined whether the value is Cv1, the value Cv1 read the first time, or a value other than C (Cv2 to Cv0) (step 102). In step 102, Cva”
If it is determined that the value Cv1 is Cvl, the value Cv1 read in step 101 is temporarily stored in a predetermined storage area rAJ of the memory section in the reference value automatic setting section 11 (step 10
3). If it is determined in step 102 that Cva is Cv1, the value of Cva is rAJ±K (here, "A" means the value of Cv written in step 103 in the previous period, and indicates a predetermined range) (step 110). If it is determined in step 110 that the value of C is within the upper age range, the process moves to step 104. On the other hand, if it is determined in step 110 that the value of Cva is not within the above range, the NG flag set in the automatic reference value setting section 11 is set to "1". Here, N
The G flag is a flag for determining whether or not the value temporarily stored in the previous predetermined storage area rAJ is registered in another storage area as the light core breakage determination reference value: C.
Registration is performed when the value is ``1'', and no registration is performed when the value is ``1''. Therefore, setting the NG flag to "1" means that the value of cv1 cannot be used as a reference value for determining whether or not the lamp is broken (step 111). After setting the NG flag to "12" in step 111, the process moves to step 104.

That is, it is determined whether the count number a of the time integral value of the voltage waveform has reached the final value: n (step 104).

If it is determined in step 104 that it is a4n, the process moves to step 101 to read the next time integral value. By repeatedly executing the process described above, starting with the time integral value C read in the second time, Cv
3"v4'"" Continuously monitor whether or not Cvn is within the range of Cvl:!.And if all these time integral values are within the range of C±, Cv
The value of l is registered (updated) in a storage area different from the predetermined storage area rAJ of the memory section as the light core breakage determination reference value 20.
I will do it. By repeating the above process in this manner, when the number of times the reference value automatic setting unit 11 has read the time integral value reaches n times, it becomes an, and the process moves to step 105. Then, step 1
It is determined whether the NG flag mentioned in step 11 is set to "1" (step 105). In step 105, when it is determined that the NG flag is set to "1", the storage area r
Light breakage judgment standard value temporarily stored in AJ: C
The process immediately moves to step 108 without making any settings. That is, NG set to 1'' in step 111
The flag is reset to "0" (step 108), and the number of times a of reading the time integral value of the voltage waveform is also reset to "0".
Sort (step 109) and return to step 101.

On the other hand, when it is determined in step 105 that the NG flag is not set to "1", the value temporarily stored in the storage area rAJ is registered in another storage area as the lamp breakage determination reference value: C. (Step 106).The value set as the light core breakage determination reference value, C, in step 106 is
The sum ( Difference) It is determined whether or not X is within the range of C+ (step 107). When it is determined in step 107 that S vx is within the range of C or C±, the process moves to step 108 described above.

On the other hand, when it is determined in step 107 that C is within the S vx range of C+, the system abnormality determination unit 1
In step 5, it is determined that an abnormality has occurred in the terminal section, and the occurrence of an abnormality in the terminal section is notified by display, alarm, etc., and the process proceeds to step 112).

Here, based on the above-mentioned contents, the reference value automatic setting section 11
A case will be described in which, while reading the values of Cv1 to Cvn, one of the lamps is disconnected and the time integral value of the voltage waveform having a high value is measured for several cycles. For this reason, when a value exceeding the range of the time-integrated value of the voltage waveform (Cv□±) when the system is normal is detected, the erroneous value is used as a provisional lamp breakage determination reference value and is stored in the storage area rAJ. Update the memory contents of. Then, after several cycles have passed, a short circuit operation is performed by the short circuit control unit 23 of the terminal section corresponding to the broken lamp, and it is detected that the time integral value of the voltage waveform has returned to a normal value again. At this point, the storage contents in the storage area rAJ are updated to the normal value. During this time, the lamp breakage determination reference value 2C corresponding to the above operation is not set (updated) in a storage area other than the storage area rAJ. Therefore, even during this time, it is possible to stably detect core breaks in other lamps. Apart from the above embodiment, the contents of the memory in the storage area rAJ may be updated after the reference value automatic setting unit 11 has read the time integral value of the voltage waveform n times. Detection, etc. can be performed stably. In this case, even if compared to the previously set value: C+, the value of C is CV
xVX
Since it is within the range of S±, the system abnormality determining section 15 determines that each of the terminals R■ to Rn is "normal".

Next, any of the above-mentioned lights L1 to L is broken,
In addition, since an abnormality has occurred in the terminal section corresponding to the broken lamp among the terminal sections R1 to Rn, the short circuit control section 23 of the terminal section performs a short circuit operation, and the time integral value of the voltage waveform of a constantly high value. is from the voltage waveform counting section 10 to the reference value automatic setting section 11.
We will explain the case where it is output. In such a state, the time integral value of the voltage waveform read by the automatic reference value setting unit 11 from the voltage waveform counting unit 10 becomes a higher value than the first value; Cvl. The value read by the reference value automatic setting unit 11 is temporarily stored in the predetermined storage area rAJ as described above, and the stored value is sequentially updated with the newly read value, When the number of readings reaches n, the value temporarily stored in the storage area rAJ is set (updated) in another storage area as the lamp breakage determination reference value: C. In this case, the light core breakage determination reference value: C is high, and the above C±S
Since it is outside the range of VXK, the system abnormality determining section 15 determines that an abnormality has occurred in either of the terminals R and -Rn.

As is clear from the above content, by comparing the light core breakage determination reference value set by the reference value automatic setting unit 11 and the value counted by the voltage waveform counting unit 10, in the core breakage determination unit 14. Since the presence or absence of a broken light is determined, if an abnormality occurs in any of the terminals R1 to Rn and the light corresponding to the terminal in which this abnormality occurs is broken, the time integral value of the voltage waveform will be changed. Even if the value always shows a high value, core breaks can be detected for other lights without any problem. Further, the system abnormality determination unit 15x compares the lamp breakage determination reference value C set by the automatic reference value setting unit 11 with the C± set by the tap-specific reference value setting unit 13. Accordingly, it is also possible to determine whether an abnormality has occurred in any of the terminal sections R1 to R.

Next, the operation of the lamp breakage detection device having the configuration shown in FIGS. 1 and 2 when each of the terminals R1 to Ro is normal will be described. First, if the light L1 is broken, the output of the constant current power supply device 2 will change accordingly, and this output fluctuation will be detected by the breakage/abnormality determination section 16 and output to the breakage position determination section 9. . On the other hand, due to the disconnection, the secondary side of the isolation transformer CT1 becomes almost open, and an overvoltage occurs. This overvoltage is detected by the overvoltage detection section 21 of the terminal portion R1, and a detection signal indicating that an overvoltage has occurred is outputted to the short circuit control section 23. Upon receiving the detection signal, the short-circuit control section 23 short-circuits the secondary side of the isolation transformer CT1 by controlling the thyristor section 22.

This determines whether the light Ll is broken or broken/abnormality occurrence determination unit 1
6, it will not be tested.

On the other hand, in the manner described above, the power supply control unit 8 instantaneously stops the output of the constant current power supply 2 indicating, for example, a 1-cycle request for determining the presence or absence of core breakage or a 2-cycle diagnosis request. Now, when the power supply control unit 8 stops for 1 g indicating a request for determining the presence or absence of core breakage for one cycle, the output current from the constant current power supply 2 (see FIG. (a)) and output voltage (Fig. 11(b))
becomes 0. When the instantaneous stop of the output of the constant current power supply device 2 is performed by the power supply control section 8, the current interruption detection section 25 provided in the terminal section R1 detects the instantaneous stop of the output and outputs it to the short circuit control section 23. .

Upon receiving the output, the short-circuit control unit 23 determines that it is a request to determine the presence or absence of a break in the light based on the length of the instantaneous stop time, and controls the thyristor unit 22 after the time t1 set by the time setting unit 24 has elapsed. By doing so, the short circuit is released for a certain period of time T as shown in FIG. 11(d).

The reason why the short circuit is released after the instantaneous stop is to synchronize the timing at which counting of the time t, which differs for each lamp, is started with the timing at which one cycle of the waveform starts.

When the short circuit is removed, a change occurs in the output voltage waveform (FIG. 11(b)) due to the breakage of the light L1, so the breakage/abnormality determination unit 16 detects this change using the method described above. , determines that a core break has occurred, and notifies the core break position determining unit 9.

In this case, the notification that core breakage has occurred will be delayed by the saturation time α from the start time of the short-circuit release time.

Similarly, on the condition that the lamp L1 is in a normal state, when the power supply control section 8 performs an instantaneous stop indicating a two-cycle diagnosis request, a fixed state is set as shown by the dotted line in FIG. Output current from current power supply device 2 (11th
(a)) and the output voltage (FIG. 11(b)) become O. When the power supply control section 8 instantaneously stops the output of the constant current power supply 2, the current interruption detection section 25 provided in the terminal section RI detects the instantaneous stop of the output and outputs it to the short circuit control section 23. . When the short-circuit control unit 23 receives the output, it determines that it is a request for diagnosis of normality/abnormality of the terminal unit based on the length of the instantaneous stop time, and controls the thyristor unit 29, which is kept in a normally closed state, to perform insulation. Open the secondary side of transformer CT. Under the control of the short-circuit control unit 23, when the secondary side of the isolation transformer CT is opened by the syrisk unit 29, this opening causes a disconnection on the secondary side of the insulation transformer CT1 in the same way as when the lamp L1 is disconnected. Overvoltage occurs.

When an overvoltage occurs on the secondary side of the isolation transformer CT1 in this way, the generated overvoltage is detected by the overvoltage detection section 21, and the overvoltage detection section 21 outputs an overvoltage detection signal to the short circuit control section 23 through the delay circuit 31. be done. The short circuit control section 23 controls the thyristor section 22 based on the detection signal.
is opened, and the secondary side of the isolation transformer CT is short-circuited. Then, upon recognizing that the time t1 has elapsed from the time when the current interruption detection unit 25 outputs a signal indicating that a diagnosis request has been made based on the output signal from the time setting unit 24, the short circuit control unit 23: Similar to when there is a request to detect the presence or absence of core breakage, the short circuit is canceled for a certain period of time T. Since a change occurs in the output voltage waveform (FIG. 11(b)) due to the release of this short circuit, the breakage/abnormality occurrence determining section 16 detects this change using the method described above and notifies the breakage position determining section 9. do. The core breakage position determining unit 9 determines that the terminal portion R1 is normal in the same manner as when there is a request to detect the presence or absence of core breakage described above. The notification from the core breakage/abnormality occurrence determination unit 16 to the core breakage position determination unit 9 is based on the above-mentioned short-circuit release time T.
The start time of is delayed by the saturation time α.

Here, the operation on the master station 7 side will be further explained.

When a core break occurs in any of the lights, the core break position determining unit 9 of the master station 7 detects the fluctuation in the output of the constant current power supply 2 caused by the core break. Abnormality occurrence determination unit 1
The time point at which the power supply control section 8 performs the instantaneous stop after the detection by the power supply controller 6 is defined as a reference time point. Then, each light L 2 ,
. . . For each Ln, the time until the fluctuation in the output of the constant current power supply device 2 is detected due to the short-circuit release operation described above (i.e., measurement time) is sequentially determined, and the saturation time α is calculated from the determined time value. Calculate the value by subtracting the value. Then, each of the lights L1L, .
The determination times tx and t2゜2'nt for each match are made to correspond to each other individually, and if the determined time and the pre-fertilization fixed time t1 respectively match, it is determined that the light L1 is a broken-core light. becomes. Even when a terminal unit diagnosis request is made, it is possible to detect an abnormal terminal unit in substantially the same manner as described above.

Next, if the light L2 is disconnected, the secondary side of the isolation transformer CT2 will be in a nearly open state and an overvoltage will occur. The overvoltage detection section 21 of the terminal section R2 detects this overvoltage and outputs a detection signal to the short circuit control section 23 indicating that an overvoltage has occurred.

Upon receiving the detection signal, the short-circuit control unit 23 short-circuits the secondary side of the insulation transformer CT2 by controlling the thyristor unit 22 after a certain cycle has elapsed, thereby causing the disconnection of the light L2 to become disconnected/abnormal. A state is set in which the occurrence determination unit 16 does not detect it.

On the other hand, when the constant current power supply device 2 is instantaneously stopped by the power supply control unit 8 in the manner described above, the output current from the constant current power supply device 2 (the Figure 11 (a)) and output voltage (Figure 11 (b)
) or becomes 0. When the power supply control section 8 instantaneously stops the output of the constant current power supply device 2, the current disconnection detection section 25 provided in the terminal section R7 outputs a signal indicating that there is a request to detect no core breakage. It is output to the short circuit control section 23.

When the short-circuit control section 23 receives the output, it controls the thyristor section 22 after a preset determination time t2 has elapsed since receiving the output, as shown in FIG. 11(d). The short circuit is released for a time T1. When the short circuit is released in this way, a change occurs in the output voltage waveform (FIG. 11 (b)) due to the breakage of the light L2, so the breakage/abnormality determination unit 6 detects this change as described above. method, determines that a core break has occurred, and notifies the core break position determination unit 9.The core break position determination unit 9 detects the core break/abnormality occurrence determination unit 16 or the light in the same manner as described above. After detecting that the output of the constant current power supply device 2 has fluctuated due to the breakage of L2, the power supply control unit 8 instantaneously stops the output, and then the breakage/abnormality determination unit 16 outputs a predetermined signal. It is determined that the light L2 is broken because the counted time up to the time when the output value matches the value of the judgment time t2 + saturation time α.It is determined whether the terminal part R2 is normal or not. The process is almost the same as above.In addition, even if the core breakage occurs in multiple locations, each terminal part R1, R2, . . .
It is necessary to adjust the respective times TI for releasing the short circuit in Rn so that they do not overlap.

Next, the detection operation of the lamp breakage detecting device will be described using as an example the case (2) in which the lamp L1 and the light L2 are broken at the same time. If a core break occurs in the light L and light L2 at the same time, this will cause the output of the constant current power supply 2 to fluctuate, so this output fluctuation will be detected by the core break/abnormality occurrence determining section 16, and will be detected by the core break position determining section 9. Output. On the other hand, the overvoltage detection section 21 provided in the terminal section R1 and the terminal section R2
At the same time, the overvoltage detection unit 21 provided in
The terminals R1 and R2 are short-circuited by short-circuiting portions 27 provided separately. Then, when the output of the constant current power supply device 2 is momentarily stopped by the power supply control section 8, the terminal section R,
, R2 starts counting time from that point in time as described above, and when the counting time reaches the value of determination time t1+saturation time α in terminal section R1, on the other hand, terminal section In R2, when the counting time reaches the value of determination time t2+saturation time a, the short-circuit release operation is executed. In this way, if the short-circuit release operation is performed for each terminal RIR2 for the time T1 at the time when the counting time reaches tl and the time when the counting time t2 is reached, the breakage position can be determined in the manner described above. Since the section 9 can recognize the occurrence of the core breakage, the core breakage position determining section 9 is capable of determining that the light L 1 and the light L2 are broken using the process already described. The determination as to whether the terminal portions R1 and R2 are normal is also the same as above.

In this case, the length of the judgment time t is t 1+T+T
(However, T is x shown in FIG. 11(c), and is the recovery time of the core breakage/abnormality occurrence determination section 16.)
be larger than This prevents the respective times T for releasing the short circuit from overlapping even if breakage occurs at multiple locations. Therefore, the time t corresponding to the light L
3 is t s > t 2 + T +T, and the time t corresponding to the light L is t > X 1
n nt
+T+T.

n-I There is no need to patrol the runway to find out the lights.
The efficiency of maintenance and inspection work can be greatly improved.

In this case, if the cycle of instantaneous stopping of the output of the constant current power supply device 2 performed by the power supply control unit 8 is shortened, a broken lamp can be detected in a short time after the core breakage occurs.

Moreover, for each of the above-mentioned lights Ll, R2,..., Ln,
Even in the event of core breakage, isolation transformer CT1゜CT2
,..., short-circuit the secondary side of CTn to make it in the same state as when no core breakage occurs, and short-circuit the secondary side of insulation transformers CT and CT2゜CT of normal lights every certain period. T
Since the short-circuit is released only for the isolation transformers CT, CT2. ..., generation of high voltage on the secondary side of CTn can be avoided. Therefore, the isolation transformers CT, CT2. ..., it is possible to prevent short circuit between windings in CTn and burnout due to temperature rise.

Further, an abnormality occurs in one of the terminal terminals R1 to Rn, and the short circuit control section 23 of the terminal section does not perform the short circuit operation, and
Even if the light corresponding to this terminal part breaks, this does not make it impossible to detect the breakage of the remaining lights. In this way, even if an abnormality occurs in any of the terminals R1 to Rn, the power supply control unit 8 instantaneously stops the output of the constant current power supply 2 for a predetermined cycle, thereby preventing short-circuiting of the remaining terminals. The control 23 operates the thyristor unit 29 when the corresponding light is not disconnected, and operates the thyristor unit 22 when the corresponding light is disconnected to create a pseudo disconnected state for a predetermined period of time, and takes countermeasures. By closing the thyristor section 22 until the determination time has elapsed and then releasing the open state for a short time after the determination time has elapsed, it is possible to notify the disconnected position determination section 9 that the terminal section is normal. That is, in a normal terminal section, the thyristor section 22. is in a normally open state. By controlling the normally closed cyrisk section 29 as described above to temporarily cause a pseudo-breakage state, fluctuations in the time integral value of the voltage waveform are observed, but when the corresponding light is cut off. This is because if both the center and the terminal part themselves are abnormal, a time-integrated value of a voltage waveform with a high value will be constantly output and no change will be recognized.

Next, other embodiments according to the present invention will be described. Another embodiment according to the present invention includes the terminal portion R1 of the embodiment described above,
The configuration contents of R2, . . . , Ro (Fig. 2) are changed, and the terminal section RR is shown in Fig. 3.

Shown as In the terminal section R1 shown in FIG.
An overvoltage detection unit 21 is used as an open state detection means, and by detecting an overvoltage generated on the secondary side of the isolation transformer CT1 by the overvoltage detection unit 21, occurrence of core breakage in the light L1 is detected. . On the other hand, in this terminal part RR1, the open state is detected through the current transformer 41, which is an open state detection means connected in series with the light L1, to indicate that the current flowing through the light L1 is cut off due to the occurrence of core breakage. The difference is that the lamp current detecting unit 42 serving as a means detects the occurrence of core breakage in the lamp L1. The apparatus is completely similar to the lamp breakage detecting device according to the embodiment described above, except that it detects that the light Ll has broken in this manner.

It should be noted that the above-mentioned embodiments are all examples according to the present invention, and do not mean that the lamp core breakage detection device according to the present invention is limited to the above two embodiments. for example,
In the above two embodiments, isolation transformers CT1 to CT,
In the above two embodiments, a thyristor is used as a means for short-circuiting the secondary side of the circuit, or other means may be used, such as using a relay to perform short-circuiting/opening by opening and closing its contacts. Furthermore, it is not always necessary for the core breakage position determination unit 9 to automatically perform the core breakage position determination operation at regular intervals, and therefore, the constant current power supply 2
It is not necessarily necessary to instantaneously stop the output of the output. For example, the output may be momentarily stopped two to three times at intervals of several minutes every hour on the hour, and when the operator wants to detect a break in a light, the output may be momentarily stopped by manual operation. It may also be something that causes it to stop.

In the two embodiments described above, the instantaneous stop of the pressure of the constant current power supply device 2 performed by the power supply control unit 8 is performed by setting both the output voltage and output current from the constant current power supply device 2 to 0. However, in general, the constant current power supply device 2 is equipped with a power supply section for lighting the lamp and a power supply section for flowing a base current to obtain the time integral value when the core is broken, so only the power supply section for the light outputs. This may be done by setting the output to 0 and not setting the output of the base power supply section to 0. The waveforms of the output voltage and output current during the momentary stop of the output of & are shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, the pulsed voltage values of the AC power supply output are input sequentially, and the voltage value is determined from this voltage value and the voltage values input during a predetermined period before the input of this voltage value. Compare the light core breakage judgment standard value, and if the difference between the two is larger than the expected range, it is determined that a core breakage has occurred, and
Count the time from the instantaneous stop of the AC power supply pressure to the detection operation of the breakage determination means, compare this with the determination time set to a different value for each lamp, and determine the determination time that matches this counted time. Since we decided to distinguish between the lights that have been set, even if one of the multiple lights is broken and an abnormality occurs in the corresponding terminal, one of the lights corresponding to the other normal terminals will be detected. It is possible to provide a lamp breakage detection device that can detect a broken light when it is broken.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a light core breakage detection device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the configuration of a terminal section of the device, and FIG. 3 is a block diagram showing the configuration of a terminal section of the device according to the present invention. Block diagram showing the configuration of the terminal unit according to other embodiments, No. 4
FIG. 5 is a flowchart showing a process for setting a reference value for determining a light core breakage by reading the time integral value of a voltage waveform in a light core breakage detection device according to an embodiment of the present invention.
A timing chart showing changes in the output voltage and current waveform of a constant current power supply according to another embodiment of the present invention, FIG. 6 is a block diagram showing the configuration of a lamp breakage detection device according to the prior art, and FIG. An explanatory diagram showing changes in the output voltage and current waveform of a constant current power supply due to wick generation, and Fig. 8 is an explanatory diagram showing the relationship between the time integral value of the output voltage of the constant current power supply and the number of broken lights. , FIG. 9 is a block diagram showing the configuration of a light core breakage detection device according to the prior art of the present invention,
10 and 12 are block diagrams showing the configuration of the terminal section according to the prior art of the present invention, respectively, and FIG. 11 is a block diagram showing the configuration of the lamp breakage detection device shown in FIGS. 2 is a timing chart showing changes in the output voltage and current waveform of the current power supply device, a core breakage detection signal from the core breakage/abnormality occurrence determining section (or core breakage occurrence determining section), and a short circuit signal from the short circuit control section. 1. AC power supply, 2. Constant current power supply device, 3. 26
゜41... Current transformer, 4... Transformer, 5, 66... Series lighting circuit, 65... Core breakage detection section, 6... Core breakage occurrence determination section, 7... Master station , 8... power supply control section, 9...
Breaking position determination unit, 10... Voltage waveform counting unit, 11
. . . Reference value automatic setting section, 12 . . . Current waveform counting section, 13 . . . Reference value setting section for each tap, 14 . - Core breakage/abnormality occurrence determination section, 21... Overvoltage detection section, 22.
29... Thyristor section, 23... Short circuit control section, 24
...Time setting section, 25...Current interruption detection section, 27...
Short-circuit part, 31...Delay circuit, 42...Light current disconnection detection part, R1, R2, -, Rn--Terminal part, LTl, LT
2゜-, LT-...Light, CT, CT2. ..., CT
. n 1...Isolation transformer. Figure 3, figure 6, figure 7, figure 8

Claims (1)

[Scope of Claims] 1. A lamp breakage detection device for a series lighting circuit, each of which has a lamp lighting circuit on the secondary side of two or more transformers connected in series to a constant current type AC power source, comprising: an AC power supply control means that performs control to instantaneously stop the output of the AC power supply for a set time within a range that does not interfere with the lighting of each light; An open state detection means is provided for each light to detect when the open state of the transformer secondary side is detected, and when the transformer secondary side is short-circuited, the output of the AC power supply momentarily stops. In some cases, the short circuit control means releases the short circuit for a certain period of time after a preset determination time has elapsed; a core breakage determination means that compares a light core breakage determination reference value determined from a voltage value input during a predetermined period of time, and determines that a core breakage has occurred if the difference between the two is larger than a predetermined range; Different judgment times are set respectively, and the time from the instantaneous stop of the AC power supply output to the detection operation of the breakage judgment means is counted and compared with each of the judgment times, and it is determined that the counted time matches. A light core breakage detection device comprising: a light determination means for determining a light for which a determination time is set. 2. In the light core breakage detection device according to claim 1, the core breakage determination reference value is compared with a preset system abnormality determination reference value, and if the difference between the two is larger than a predetermined range, it is determined that the system is abnormal. What is claimed is: 1. A light core breakage detection device, comprising a system abnormality determination unit.