JPH0792498B2 - Method and apparatus for diagnosing deterioration of electronic circuit and method and apparatus for detecting abnormal waveform therefor - Google Patents

Description

Detailed Description of the Invention [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic circuit deterioration diagnosis.
Method and apparatus and method and apparatus for detecting abnormal waveform therefor
More specifically, the degree of deterioration of electronic circuits
Method and device for quantitatively diagnosing urine and abnormal wave therefor
Shape detection method and apparatus. [0002] 2. Description of the Related Art Due to the importance of its application, it is highly stable and reliable.
There are various types of electrical equipment that require reliability and cannot be tolerated.
To do. For example, power substations, gas / oil plant facilities,
Power supply unit used for communication, broadcasting, hospital, computer etc.
Is a typical example. Traditionally like this
For electrical equipment that is not allowed to fail
Frequent inspections are performed to prevent this. Also,
Even if the electronic circuits used there are working properly
However, the life is considered to have expired after a certain period of use.
None, I was trying to replace it with a new one. Also,
Provide a failure detector, and use the failure detector to
If a failure is detected, immediately turn off the auxiliary equipment.
By replacing it, the abnormality does not spread to the entire system.
I was sick. [0003] As described above, the conventional
Is a certain value regardless of whether it is operating normally
Replace the electronic circuit with a new one when the
Since it is designed to be replaced, electrical equipment using it
There was a problem that the maintenance cost would be extremely high. Also,
Maintenance is cumbersome because it requires frequent inspections.
There was a problem. In addition, backup in case of failure
Must be equipped with auxiliary equipment for
There was a problem that the cost was high. Therefore, it is an object of the present invention to provide an electronic circuit.
The degree of deterioration of the
Deterioration diagnosis method and
And apparatus and abnormal waveform detection method suitable for such deterioration diagnosis
To provide a method and a device. [0005] [Means for Solving the Problems]1The invention pertaining to
In a signal whose amplitude, maximum level and minimum level are always constant
A device that detects abnormal waveforms that occur in the
At least two thresholds between level and minimum level
The threshold setting means for setting the
Pass count detection that detects the number of times the bell passes each threshold
The output means and the respective thresholds detected by the passage count detection means
By comparing the number of passages for a certain value with each other,
And a means for detecting an abnormal waveform in the signal. ClaimsTwoThe invention according to
Waveforms that occur in a signal whose minimum level is always constant
Is a device for detecting the maximum level and the minimum level of the signal.
Threshold setting means for setting a threshold between
The number of times the signal level passes the threshold value within a fixed period is detected.
The passing count detection means and the reference communication within a predetermined period
Reference pass count setting means to set the excess count and pass count detection
Setting the number of passages detected by the output means and the reference number of passages
Comparing with a reference number of passes set by means
And a means for detecting an abnormal waveform in the signal.
It [0007]According to the invention of claim 3, in the waveform of the output signal
A device for diagnosing deterioration of an electronic circuit based on Electronic
Abnormal waveform for detecting an abnormal waveform in the output signal of the circuit
Detection means, Measure the number of abnormal waveforms detected by the abnormal waveform detector
And counting means for counting, The abnormal waveform detection means is Electronic times
Less than the maximum and minimum level of the output signal of the road
And a threshold setting means for setting two thresholds, Electric
When the level of the output signal of the slave circuit passes between the thresholds
Time width detection means for detecting the time width of the Reference time width
Reference time width setting means to be set, By the time width detection means
Set by the time width detected and the reference time width setting means
By comparing with the reference time width
And means for detecting an abnormal waveform in the output signal, Counting hand
Using the counting result of the stage as a diagnostic index of the deterioration of the electronic circuit
Characterize. [0008]The invention according to claim 4 relates to the waveform of the output signal.
A device for diagnosing deterioration of an electronic circuit based on Electronic
Abnormal waveform for detecting an abnormal waveform in the output signal of the circuit
Detection means, Measure the number of abnormal waveforms detected by the abnormal waveform detector
And counting means for counting, The abnormal waveform detection means is Signal
At least two thresholds between the maximum and minimum levels
Threshold setting means for setting a certain value, Electronic within a predetermined period
The number of times the level of the output signal of the circuit passes each threshold
Means for detecting the number of times of passage, By the passage count detection means
The number of passes for each threshold detected by
By comparing, the abnormal waveform in the output signal of the electronic circuit
And means for detecting, The counting result of the counting means is electronic circuit
Is used as a diagnostic index for deterioration of [0009]According to the invention of claim 5, the waveform of the output signal
A device for diagnosing deterioration of an electronic circuit based on Electronic
Abnormal waveform for detecting an abnormal waveform in the output signal of the circuit
Detection means, Measure the number of abnormal waveforms detected by the abnormal waveform detector
And counting means for counting, The abnormal waveform detection means is Electronic times
Threshold between the maximum and minimum level of the output signal of the road
Threshold setting means to set the value, Electronic times within a prescribed period
Detects the number of times the output signal level of a road passes a threshold value
Means for detecting the number of passages, Passing the standard within a predetermined period
A reference passage number setting means for setting the number of times, Pass count detection
Number of passing times detected by means and reference passing number setting hand
To compare with the reference number of passes set by the dan
For detecting an abnormal waveform in the output signal of an electronic circuit
Including and Diagnosis of deterioration of electronic circuit by counting result of counting means
It is characterized by being used as an index. [0010]According to the invention of claim 6, the waveform of the output signal
A device for diagnosing deterioration of an electronic circuit based on Electronic
Abnormal waveform for detecting an abnormal waveform in the output signal of the circuit
Detection means, Measure the number of abnormal waveforms detected by the abnormal waveform detector
And counting means for counting, The abnormal waveform detection means is Electronic times
Between the maximum and minimum level of the output signal of the road
And threshold setting means for setting the second threshold, Electric
The level of the output signal of the child circuit is the first and second threshold values.
Between the first and second threshold values immediately after
Based on the mismatch with the direction from the
And a means for detecting an abnormal waveform in the force signal, Counting means
It is a special feature that the counting result of
To collect. [0011]According to the invention of claim 7, the waveform of the output signal
A device for diagnosing deterioration of an electronic circuit based on Electronic
Abnormal waveform for detecting an abnormal waveform in the output signal of the circuit
Detection means, Measure the number of abnormal waveforms detected by the abnormal waveform detector
Counting means for counting, Counting every predetermined time
When the counting result of the means exceeds a predetermined value, the electronic circuit
And a determining means for determining that it is normal. Claims8The invention according to
Waveforms that occur in a signal whose minimum level is always constant
Is a method of detecting the maximum signal level and the minimum signal level.
Set at least two thresholds between the
Detects the number of times the signal level passes each threshold in the interval
The number of passes for each detected threshold
Detect abnormal waveforms in signals by comparing each other
It is characterized by Claims9The invention according to
Waveforms that occur in a signal whose minimum level is always constant
Is a method of detecting the maximum signal level and the minimum signal level.
Set a threshold between the signal level and
Detected the number of times the
Number of passages and reference number of passages within a preset period
The abnormal waveform in the signal can be detected by comparing
And are characterized. [0014]The invention according to claim 10 is the waveform of an output signal.
A method of diagnosing deterioration of an electronic circuit based on Electric
Between the maximum level and the minimum level of the output signal of the slave circuit,
Even if two thresholds are set, the output signal of the electronic circuit
The time width when the level of the signal passes between the thresholds
However, this detected time width and the preset reference time width
By comparing with, the abnormality in the output signal of the electronic circuit
Detecting waveforms and counting the number of abnormal waveforms detected
Is used as a diagnostic index for deterioration of electronic circuits.
It [0015]The invention according to claim 11 is the waveform of the output signal.
A method of diagnosing deterioration of an electronic circuit based on Belief
Between at least two levels of
Set the threshold value and set the output signal of the electronic circuit within the predetermined period.
Detects the number of times the level passes each threshold and detects this
The number of passes for each given threshold against each other
Detect an abnormal waveform in the output signal of the electronic circuit
Then, by counting the number of times the abnormal waveform is detected,
It is characterized by being used as a diagnostic index of circuit deterioration. [0016]The invention according to claim 12 is the waveform of the output signal.
A method of diagnosing deterioration of an electronic circuit based on Electric
Between the maximum level and the minimum level of the output signal of the slave circuit
Set a threshold value and check the output signal of the electronic circuit within a predetermined period.
The number of times the bell passes the threshold is detected and this
The number of passing times and the reference number of passing times within a preset period
By comparing with, the abnormality in the output signal of the electronic circuit
Detecting waveforms and counting the number of abnormal waveforms detected
Is used as a diagnostic index for deterioration of electronic circuits.
It [0017]The invention according to claim 13 is the waveform of an output signal.
To diagnose the deterioration of electronic circuits based on Method, Electric
Between the maximum level and the minimum level of the output signal of the child circuit,
Set the 1st and 2nd thresholds and output signal of electronic circuit
And the level at which the level goes between the first and second threshold values.
Immediately after and with the direction of exiting between the first and second threshold values
Anomalous waves in the output signal of the electronic circuit based on the match mismatch
By detecting the shape and counting the number of abnormal waveform detections,
It is used as a diagnostic index for deterioration of electronic circuits.
It [0018]The invention according to claim 14 is the waveform of an output signal.
A method of diagnosing deterioration of an electronic circuit based on Electric
Detects an abnormal waveform in the output signal of the slave circuit and
Counts the number of detections and counts at a predetermined fixed time
If the electronic circuit is abnormal when the result exceeds the specified value
It is characterized by judging. [0019] [Operation] Claims1 or 8In the invention relating to
Between the maximum and minimum level of the signal whose waveform is to be detected
Set at least two thresholds for
The number of times the level of this signal passes each threshold within
Detect abnormal waveforms in signals by comparing each other
I am trying. Claims2 or 9In the invention pertaining to
The maximum level and minimum level of the signal that should detect the abnormal waveform
Set a threshold value between the
The number of times the level of the
By comparing the number of times of passing the reference within the fixed period,
The abnormal waveform inside is detected. Claims3 or 10In the invention pertaining to
Is the maximum and minimum level of the output signal of the electronic circuit
Set at least two threshold values between
Time width when the level of the force signal passes between each threshold
By comparing with the preset reference time width,
The abnormal waveform in the output signal is detected. Claims4 or 11In the invention pertaining to
Is the maximum and minimum level of the output signal of the electronic circuit
Set at least two thresholds in between, and
The number of times the level of this output signal passes each threshold within
Abnormal waveforms in the output signal by comparing the numbers with each other
I am trying to detect. Claims5 or 12In the invention pertaining to
Is the maximum and minimum level of the output signal of the electronic circuit
Set a threshold between them and output this signal within the specified period.
Number of times the level of the signal passes the threshold and preset
By comparing with the reference number of passages within a predetermined period,
The abnormal waveform in the force signal is detected. Claims6 or 13In the invention pertaining to
Is the maximum and minimum level of the output signal of the electronic circuit
Set the first and second threshold values in between, and
One in which the level of the force signal falls between the first and second threshold values
Direction and immediately after that, those who exit between the first and second thresholds
The abnormal waveform in the output signal
I'm trying to detect. Claims7 or 14In the invention pertaining to
Is a predetermined value for the counting result for each predetermined time.
To determine that the electronic circuit is abnormal when it exceeds
is doing. [0026] DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a deterioration diagnosis according to an embodiment of the present invention.
Uninterruptible power supply (Uninterrupt)
Time to show the configuration of the Ible Power Supply)
It is a road map. In FIG. 1, input terminals 1 and 2 are
Connected to a commercial AC power supply not shown. Commercial AC power supply
AC power supplied from the input terminals 1 and 2 is rectified
After being converted into direct current by the device 3, the coil 4a and the condenser
Further smoothed by the smoothing circuit 4 composed of
Is given to the inverter 6. The output end of the rectifier 3
A storage battery 7 is connected to the
Has been. The inverter 6 has a plurality of switches as described later.
Including the switching element, the inverter control circuit 8
Make sure that the switching elements are turned on and off appropriately.
Convert the given DC voltage to AC pulse voltage by
To do. The output of the inverter 6 is the output of the isolation transformer 9.
It is given to the primary coil 9a. Secondary of isolation transformer 9
The output of the side coil 9b is the AC reactor 10a and the coil.
With the AC filter 10 composed of the capacitor 10b
After removing unnecessary harmonic components, output terminal 12 and
And 13 are given. Output terminals 12 and 13 are shown
Not connected to the load. Note that the output terminal 12
A change-over switch 14 is inserted between the flow filter 10 and the flow filter 10.
Has been. Further, the output of the inverter 6 is
Is given to the deterioration diagnosis device 15 which is a characteristic of This deterioration
The diagnostic device 15 includes an inverter 6 and an inverter control circuit.
This is for diagnosing the degree of progress of deterioration of the road 8. Uninterruptible power supply configured as described above
Is always connected to the rectifier 3, smoothing circuit 4,
Via inverter 6, isolation transformer 9 and AC filter 10
Supply alternating current to the load. And it stores electricity in the event of a power failure
Pond 7 to inverter 6, isolation transformer 9, AC filter
The load is subsequently supplied with power via 10. like this
The uninterruptible power supply keeps the load on even during a power failure.
Power substations, gas and
S / oil plant equipment, communication, broadcasting, hospital, computer
It is used as a power supply device. The switching switch
The switch 14 normally outputs the output of the AC filter 10 to the output terminal 1
2 is being supplied, but during testing or failure of the uninterruptible power supply
To the output terminal 12 of the commercial AC power supply.
Supply directly to. FIG. 2 is a circuit diagram of the inverter 6 in FIG.
It is a circuit diagram which shows a detailed structure. In FIG.
The data 6 is an NPN transistor as an example of a switching element.
Transistors TR1 to TR4 and backflow prevention diode D1
~ D4. The transistor TR1 has its collector
Is connected to the positive power line L1 and its emitter is
It is connected to the collector of the star TR2. Transistor
The emitter of TR2 is connected to the negative power supply line L2.
It The collector of the transistor TR3 has a positive power supply line.
It is connected to L1 and its emitter is of transistor TR4.
It is connected to the collector. Emi of transistor TR4
Is connected to the negative power supply line L2. diode
D1, D2, D3 and D4 are the transitions
Connected in parallel with TR1, TR2, TR3 and TR4
Has been. Transistors TR1, TR2, TR3 and
And the base of TR4 are controlled by the inverter control circuit 8.
Signals φA1, φA2, φB1 and φB2 are given respectively.
available. Transistor TR1 emitter and transistor
Node N1 which is the connection point with the collector of
Connected to one end of the primary coil 9a of the edge transformer 9.
Has been. On the other hand, the emitter and transistor of the transistor TR3
Node N2 which is a connection point with the collector of the transistor TR4
Is connected to the other end of the primary coil 9a. Furthermore
In addition, the node N2 is connected to the deterioration diagnosis device 15.
It FIG. 3 shows the inverter shown in FIGS. 1 and 2.
6 is a waveform diagram for explaining the operation of FIG. Below, this Figure 3
The operation of the inverter 6 will be described with reference to FIG. First, the transistor TR1 connected in series.
And the left side switching circuit constituted by TR2
Focusing on the road (hereinafter referred to as the left arm) LA,
The control signal φA1 given to the base of the transistor TR1
Control signal φA given to the base of the transistor TR2
2 has a complementary relationship with each other as shown in FIG.
There is. Therefore, the transistors TR1 and TR2 are
Alternately turns on and off, and turns on at the same time
There is no such thing. On the other hand, the transistor TR3 connected in series
And the switching circuit on the right side composed of TR4 (hereinafter
The same applies to RA (below, referred to as a light arm). Sanawa
The transistors TR3 and TR4 have complementary control
The signals φB1 and φB2 are turned on and off alternately.
Repeatedly, it is not turned on at the same time. The transistors TR1 and TR3 are turned on.
And the transistors TR2 and TR4 are off.
Or when transistors TR1 and TR3 are off
And the transistors TR2 and TR4 are turned on.
At this time, no potential difference is generated between the nodes N1 and N2, and
The primary side voltage V1 of the edge transformer 9 becomes 0V. Also,
Transistors TR1 and TR4 are on and
When transistors TR2 and TR3 are off, the node
N1 is a positive power supply voltage and node N2 is a negative power supply voltage.
It Therefore, at this time, the primary side voltage of the isolation transformer 9
V1 becomes the maximum positive voltage Vmax. On the contrary, Transis
Transistors TR1 and TR4 are off and the transistor T
Node N1 is negative when R2 and TR3 are on
Power supply voltage of node N2 becomes positive power supply voltage
The primary side voltage V1 of the lance 9 becomes the maximum negative voltage −Vmax.
Become. As described above, the output voltage of the inverter 6
That is, the primary side voltage V1 of the isolation transformer 9 is
3 depending on the combination of the ON / OFF states of TR1 to TR4
Voltage values of Vmax, 0V, and -Vmax can be taken. did
Therefore, the left arm L is controlled by the inverter control circuit 8.
It is necessary to properly shift the operating states of A and the light arm RA.
And the AC pulse of a non-uniform width rectangular wave as shown in FIG.
The voltage V1 can be obtained. The AC pulse voltage V1 is a rectangular wave of non-uniform width.
Therefore, many harmonics are included. This harmonic is
Filter 10 and remove only the fundamental wave.
Therefore, a sine wave AC V2 as shown in FIG. 3 can be obtained.
It It should be noted that the inverter control circuit 8 controls the AC pulse
If the pulse width of the pressure V1 is controlled appropriately, the sine wave AC voltage V
Constant voltage control that keeps the effective value of 2 constant
It It should be noted that as shown in the enlarged view at the bottom of FIG.
The control signals φB1 and φB2 are
Both the transistors TR3 and TR4 are turned off.
I have time. This is the transistor TR3 and
Due to delay of switching operation of TR4,
To prevent TR3 and TR4 from turning on at the same time
It is. This means that the control signals φA1 and φA2
The same is true for the transistor TR1.
And TR2 are prevented from turning on at the same time.
It By the way, the components of the inverter control circuit 8 are determined.
When the number gradually changes due to deterioration over time, each control signal φ
Timing relation and voltage of A1, φA2, φB1, φB2
There is a gap in the level. Also, in the inverter 6
The operating speeds of the respective transistors TR1 to TR4 are also repeated.
It is considered that the surge voltage gradually deteriorates if it enters.
It Due to these causes, the needle-shaped pulse is
May occur or an intermediate voltage (between the maximum voltage and the minimum voltage
Output). Output of intermediate voltage
The transistors above and below the arm are on at the same time
Occasionally, and when it is on for a short time at the same time
It becomes a needle-like pulse. As another abnormal example, the inverter 6
The switching speed of the transistors that make up the
And the inclination when the arm output reverses becomes loose, etc.
There is also the phenomenon of. Grasping those signs, it is suitable for major failure
It is the deterioration diagnostic equipment that captures the fact that deterioration is progressing.
This is the role of the device 15. FIG. 4 shows the left arm LA (or the right arm).
Arm RA) typical example of abnormal waveform included in output
It is a waveform diagram shown. It should be noted that FIG. 4 shows the negative power supply line L2.
The potential of the node N1 (or node N2) with respect to
It is used as the output of the LA and RA. Shown in Figure 4 (a)
The arm output is needle-shaped with an intermediate voltage as an abnormal waveform.
The abnormal pulse P1 is included. Also shown in FIG.
The arm output is an abnormal waveform with an edge part of the normal pulse.
The intermediate voltage output P2 is included in the minute. In addition, FIG.
The arm output shown in is the maximum voltage Vmax as an abnormal waveform.
An abnormal pulse P3 having Before giving a detailed description of the deterioration diagnostic device 15.
In addition, referring to FIG. 5, an abnormal waveform in the deterioration diagnosis device 15
The detection principle of is explained. First, the maximum voltage V of the arm output
Between max and the minimum voltage 0V, at least two lines
Threshold voltage Va, Vb (Vmax> Va> Vb> 0V)
Is set. The deterioration diagnosing device 15 has an arm output voltage level.
Bell passes threshold voltage Vb and then Va
Until the time width (or the threshold voltage Va has passed)
Time width from passing to Vb) Tw (or T
w ') is measured. Then, this measured time width Tw
(Or Tw ′) is compared with a preset reference time width.
In comparison, the measured time width Tw (or Tw ′) is
If it is longer than the set reference time width,
Abnormal waveform or intermediate voltage at the edge of the pulse
It is determined that the output P2 (or P2 ') is generated. Next, the deterioration diagnosing device 15 is set within a predetermined time.
The output voltage level of the arm passes the threshold voltage Va.
Individually measure the number of times and the number of times the threshold voltage Vb is passed
To do. Then, the two measured values are compared, and the two measured values do not match.
In this case, the arm output has an abnormal waveform, that is, the threshold voltage V.
includes an abnormal pulse P1 having a level between a and Vb
It is determined that Next, the deterioration diagnosing device 15 is set within the predetermined time.
The output voltage level of the arm passes the threshold voltage Va.
Measure the number of times. Then, this measured number of times is set in advance.
If it is more than the specified reference frequency value, the abnormal waveform
The abnormal power having a level higher than the threshold voltage Va.
It is determined that Ruth P3 is included. FIG. 6 shows the structure of the deterioration diagnosis device 15 shown in FIG.
It is a block diagram showing an example of composition. In addition, inferiority shown in FIG.
The computerized diagnosis device detects deterioration only by the hardware circuit.
It is configured to In FIG. 6, the output of the right arm RA
Are provided to level detectors 201 and 202. Les
The bell detector 201 includes a threshold level setting circuit 203.
Is given a threshold voltage Va. Also the level
From the threshold level setting circuit 203 to the detector 202,
The threshold voltage Vb is given. Level detector 20
The detection outputs of 1 and 202 are the counter 20
4 and 205. Counter 204 counter
Output is provided to comparators 206 and 207. Mosquito
The count output of the counter 205 is given to the comparator 207.
Be done. The comparator 206 is provided with a reference number setting circuit 208.
A reference count value is given. Of the comparators 206 and 207
The output is given to the OR gate 209. The oscillator 210 is a pulse signal of a constant frequency.
Is output. The oscillation frequency of the oscillator 210 is
A value that is sufficiently larger than the maximum frequency of the output pulse of RA
Has been selected. The output pulse of the oscillator 210 is reset
It is given to the pulse generation circuit 211. From reset pulse
The raw circuit 211 includes, for example, a frequency divider, of the oscillator 210.
Create a reset pulse from the output pulse. This reset
Pulse is provided to counters 204 and 205.
It The outputs of the level detectors 201 and 202 are
The timer counter 21 is used as an enable signal.
2 and 213. In addition, the level detector 20
The outputs of 1 and 202 are reset signals, respectively.
And provided to the timer counters 213 and 212.
Further, the timer counters 212 and 213 have oscillations.
The oscillation output of the instrument 210 is given as a clock signal.
It Count output of timer counters 212 and 213
Are provided to comparators 214 and 215, respectively.
It The comparators 214 and 215 have reference time width setting times.
The reference time width is given from the path 216. Comparator 214
The outputs of and 215 are provided to OR gate 209. The output of the OR gate 209 is the counter 21.
Given to 7. This counter 217 has a reset signal
Set at regular time intervals (for example, 1 hour)
It The count output of the counter 217 is displayed by the display device 21.
8, given to recording device 219 and alarm device 220
It Next, the operation of the deterioration diagnosing device shown in FIG. 6 will be explained.
Reveal The level detector 201 outputs the light arm RA.
When the force level matches the threshold voltage Va, the detection pulse
Output. Similarly, the level detector 202 is
The output level of the arm RA matches the threshold voltage Vb
Sometimes it outputs a detection pulse. The counter 204 has a level
By counting the detection pulses of the detector 201.
And the output level of the write arm RA is the threshold voltage Va.
Count the number of times you pass. The counter 205 is
By counting the detection pulses of the bell detector 202,
And the output level of the write arm RA is the threshold voltage Vb.
Count the number of times you pass. Counter 204 and
205 is a reset pulse from the reset pulse generation circuit 211.
Pulse is reset every predetermined period. Cow
The counter 204 will return its count result when it is reset.
Is output to the comparators 206 and 207. Similarly, cow
Counter 205, when it is reset
Is output to the comparator 207. The comparator 206 counts the counter 204.
Value (the output level of the right arm RA is
Number of times threshold voltage Va has been passed) and reference number setting circuit 2
08 compared with the reference number of times value,
The abnormal waveform detection pulse is output. Where the reference number
The output waveform of the write arm RA is positive in the setting circuit 208.
If the output level of the right arm RA is
The reference number of times of passing the high voltage Va is set.
It Therefore, if the comparator 206 detects a mismatch,
In this case, the abnormal pulse shown in FIG.
P3 is included. The comparator 207 counts the counter 204.
Value (the output level of the right arm RA is
The number of times the threshold voltage Va has been passed) and the counter 205
Unt value (the output level of the right arm RA within a predetermined period
Of the threshold voltage Vb), and
An abnormal waveform detection pulse is output when there is a match. Lighter
If the output waveform of the RAM RA is normal, the counter 204
And the count value of the counter 205 always match.
Should be. However, the output wave of the light arm RA
If the shape contains an intermediate level abnormal pulse P1
Indicates that the count value of the counter 205 is the counter 204
More than the count value of. Therefore, the comparator 20
7 counts the count values of the counters 204 and 205 with each other.
To the output waveform of the light arm RA by comparing
It is detected whether or not the abnormal pulse P1 is included.
It The timer counter 212 is a light arm R.
When the output level of A passes the threshold voltage Va,
It is started by the detection output of the bell detector 201,
Counts the clock signal given from the shaker 210
It Then, the timer counter 212 has the right arm R
When the output level of A passes the threshold voltage Vb,
It is reset by the detection output of the bell detector 202.
Therefore, the timer counter 212 has the right arm R
After the output level of A has passed the threshold voltage Va,
Time width Tw 'before passing a certain value voltage Vb (see FIG. 5)
Is being measured. On the other hand, the timer counter 213
The output of the write arm RA has passed the threshold voltage Vb
Sometimes start by detection output of level detector 202
And counts the clock signal from the oscillator 210
It Then, the timer counter 213 indicates that the light arm R
When the output level of A passes the threshold voltage Va,
It is reset by the detection output of the bell detector 201.
Therefore, the timer counter 213 has the right arm R
After the output level of A has passed the threshold voltage Vb,
Time width Tw before passing the threshold voltage Va (see FIG. 5)
Is being measured. The output waveform of the light arm RA is a rectangular wave.
Therefore, timer counters 212 and 213
Each time width measured should be almost zero. However
However, the output waveform of the light arm RA is a pulse edge.
In the part, the intermediate voltage output P2 as shown in FIG. 5 or
If P2 'is included, the timer counter 213 or 212
The time width Tw or Tw 'measured by
become longer. The reference time width setting circuit 216 includes a pulse error
The standard time width that can be allowed in the
There is. The comparator 214 has a timer counter 212.
Abnormal waveform detection when the count value exceeds the above reference time width
Output the output pulse. Similarly, the comparator 215 has a timer
When the count value of the counter 213 exceeds the reference time width
An abnormal waveform detection pulse is output to. That is, the comparator 2
14 is the trailing edge of the output pulse of the write arm RA.
Whether or not there is an intermediate voltage output P2 'in the edge portion
Is being detected. Further, the comparator 215 is a light arm R.
At the rising edge of the output pulse of A,
It is detected whether or not the pressure output P2 exists. Comparators 206, 207, 214 and 21
The abnormal waveform detection pulse output from the OR gate 5 is the OR gate 2
It is given to the counter 217 via 09 and is counted.
It This counter 217 has a fixed time (for example, 1 o'clock).
It is reset every time). Then, the
The count value is displayed on the display device 218, and the recording device 219 is displayed.
Recorded in. Therefore, the user can
If you look at the displayed contents and the recorded contents of the recording device 219,
How much the output waveform of the light arm RA is within a certain time
It is possible to clearly know whether or not the abnormal waveform is generated.
That is, the inverter 6 or the inverter control circuit 8
The progress of deterioration can be quantitatively grasped. Further, the alarm device 220 has a counter 217.
When the count value of exceeds the predetermined value,
Data 6 or inverter control circuit 8 causes severe deterioration.
It judges that it is working and issues an alarm. Therefore,
The user can predict the failure of the UPS before it fails.
You can know and wait for such
It is possible to replace the controller 6 or the inverter control circuit 8.
Wear. FIG. 7 shows another example of the deterioration diagnostic device 15 shown in FIG.
3 is a block diagram showing a configuration example of FIG. In addition,
The computerized diagnosis device diagnoses deterioration by program control.
It is configured to In FIG. 7, the output of the write arm RA
Is given to the A / D converter 301, and a fixed sampling
It is converted into a digital signal in a cycle. A / D converter 30
The output of 1 is the waveform memory 302 and the data processing device 3
Given to 03. The data processing device 303 is a micro
Computer, personal computer, dedicated DSP
(Digital signal processor) etc.
However, in this embodiment, a microcomputer is used.
Is configured. That is, the data processing device 303
Is a CPU 303a, a ROM 303b, and a RAM 30
3c and. The ROM 303b includes the later-described FIGS.
Various operation programs according to the flow chart as shown in 1.
The ram is stored. The CPU 303a is the ROM 30
It operates according to the operation program stored in 3b, and A /
The data provided from the D converter 301 is processed. RA
M303c is required for data processing of CPU303a
Various data are stored. The CPU 303a further includes a display device 31.
8, the recording device 319 and the alarm device 320 are connected
There is. These display device 318, recording device 319 and alarm
The configuration of the reporting device 320 is the same as that of the display device 2 shown in FIG.
18, the configuration of the recording device 219 and the alarm device 220
It is like. Next, the flow charts shown in FIGS.
The operation of the deterioration diagnosis device shown in FIG. 7 will be described with reference to FIG.
It First, in step S1 of FIG.
The current time t is set as the start time t0, and the deterioration progresses.
The deterioration degree index value Z indicating the degree is cleared. Next,
Proceed to step S2 to detect anomalies within the reference cycle.
It Details of the subroutine of step S2 are shown in FIG.
It is shown in FIG. First, in step S201 of FIG.
The CPU 303a is output from the A / D converter 301
Input sampling data and enter the waveform memory 302 or
It is stored in the RAM 303c. Next, step S202.
Then, the CPU 303a changes the sampling data to
Based on this, the reference period is detected. Where the reference period and
Means the period Ts shown in FIG. Lighter
The output waveform of the RA is a non-uniform width rectangular wave as described above.
Therefore, the pulse width fluctuates in individual pulse units,
When observed with a continuous pulse train, its waveform has a constant period.
The same changes are repeated every time. The reference period Ts is
It indicates the repetition cycle of. Next, in step S203, a total abnormality occurs.
Number of times Z0, first abnormality count value Z1, second abnormality count value
Z2, third abnormal count value Z3, passing count values Ka and K
Both b are cleared. Where the first abnormal count value
Z1 is an abnormal count value related to the abnormal pulse P1 shown in FIG.
And the second abnormality count value Z2 is shown in FIG.
Intermediate voltage outputs P2 and P2 'at the edge of the
Shows the number of abnormalities related to
Z3 is related to the abnormal pulses P1 and P3 shown in FIG.
Indicates the value of the number of abnormalities. In addition, the total abnormality count value Z0
Is a weighting calculation of the first to third abnormality count values Z1 to Z3.
And linearly combined to obtain. Passage value Ka
Indicates that the output level of the write arm RA is the threshold voltage Va.
Indicates the number of times the vehicle has passed. Pass count value Kb is light
The output level of the arm RA has passed the threshold voltage Vb.
Shows the number of times. Next, in step S204, the CPU 3
03a is the first sample in the above-mentioned reference period Ts.
Ringing value V (0) as waveform memory 302 or RAM 303.
Read from c. In addition, the sample in the reference period Ts
The number of rings is N. Therefore, the waveform memory 302 or
The RAM 303c has a sump corresponding to one cycle Ts.
N sampling values V (0) to V as ring values
(N-1) is stored. Next, in step S205, the status flag is
The initial setting of the group fp is performed. As described below, the reference circumference
Abnormality detection within the period is performed by N sampling values V (0) to V
(N-1) 2 in order from the front along the time axis direction
It is done by comparing. At this time, the same timing
Two time-adjacent sample values compared in
Of these, the state of the sampling value that is earlier in time is the state flag.
Indicated by gp fp. At the initial setting stage, the reference
Based on the first sampling value V (0) in the period, the status flag is
The lag fp is set. That is, V (0)> Va
At this time, 1 is set to the state flag fp. Also, V
When a ≧ V (0) ≧ Vb, 0 is set in the status flag fp.
Is determined. When V (0) <Vb, the status flag f
-1 is set in p. Next, the process proceeds to step S206 and the loop
The numerical value i is set to 1. Next, step S2 in FIG.
07, based on the level of the sampling value V (i)
Thus, the status flag f is set. This status flag f
Are adjacent in time compared with each other at the same timing
Of the two sampled values that were sampled later in time
It is a flag showing the state of the ring value. V (i)> Va
At this time, 1 is set to the state flag f. Va ≧ V
When (i) ≧ Vb, 0 is set to the state flag f.
It When V (i) <Vb, the status flag f is set to -1.
Is determined. Next, in step S208, the status flag is
Judgment of the relationship between the setting value of gp
To be done. The state is determined by the determination processing in step S208.
Relationship between set value of flag fp and set value of status flag f
Is classified into 5 cases, and for each classified case
Predetermined processing is performed. Predetermined processing executed at this time
The details of will be described later. Then, in step S213
Then, the setting value of the status flag f is set to the status flag fp.
Be done. Two samplers that are compared at the same time
The combination of the group value is shifted by 1 in the time axis direction.
become. Next, in step S214, the loop count value
i is incremented by 1. Next, step S2
15, the loop count value i is within a reference period Ts
It is determined whether or not the number of pulling N matches. In agreement
If not, the processes of steps S207 to S215 are repeated.
Returned and executed. Next, the classification is performed in step S208 described above.
The processing executed in each case will be described below. (1) When fp × f = −1 In this case, the two are compared at the same time as shown in FIG.
Of the two sampling values, the previous sampling value V (i
-1) is in the upper zone (voltage higher than the threshold voltage Va)
Zone) and the later sampling value V (i) is lower
Part zone (voltage zone lower than threshold voltage Vb)
Or the previous sampling value V (i-1) is below
Sampling value V (i) is higher than
It will be in the club zone. That is, the later sample
Ringing value V (i) to the previous sampling value V (i-1)
On the other hand, in the middle zone (the voltage between the threshold voltages Va and Vb)
It is changing so as to penetrate through the pressure zone). In the above case, the output level of the right arm RA
The threshold voltage Va and Vb.
Therefore, in step S209, the passing count values Ka and K
Both b are incremented by 1. In addition,
In step S209, the direction flag fs is reset and the collision
The incoming loop count value j is cleared. The direction flag f
s is the sampling value V (i) rushes into the intermediate zone.
A flag that indicates the direction (increase or decrease)
It is Gu. In addition, the inrush loop count value j is
The loop count value when the value enters the middle zone
Shows. When the operation of step S209 ends, the scan
The process proceeds to step S213. (2) When fp = 1 and f = 0 In this case, as shown on the left side of FIG.
The value V (i-1) is in the upper zone and
The ring value V (i) will be in the intermediate zone. Shi
Therefore, in this case, the output level of the light arm RA is
Since the threshold voltage Va is passed, the process proceeds to step S210.
The pass count value Ka is incremented by one.
Further, in step S210, the direction flag fs is decreased.
-1, which indicates the direction, is set. Furthermore, step S210
Then, the value of the loop count i is set to the inrush loop count value j.
Be done. When the process of step S210 ends, the step
The process proceeds to S213. (3) When fp = -1 and f = 0 In this case, as shown on the right side of FIG.
Value V (i-1) is in the lower zone, and
The sampling value V (i) must be in the intermediate zone.
It Therefore, in this case, the output level of the write arm RA is
Since the bell passes the threshold voltage Vb, step S2
11, the number of passages value Kb is incremented by 1.
Be done. In step S211, the direction flag fs is set to
1 indicating the increasing direction is set. Further, step S2
In 11, the loop count value i is set to the inrush loop count value j
To be done. When the process of step S211 ends, the step
The process proceeds to step S213. (4) When fp = 0 and f ≠ 0 In this case, as shown in FIG.
(I-1) is in the intermediate zone and is a later sample
Value V (i) must be in the upper or lower zone.
Becomes At this time, the state flag f and the direction flag fs
Changes in the output waveform of the right arm RA
There are two cases. First, in the case of f = fs, as shown in FIG.
Sea urchin, direction of entry into the middle zone and escape from the middle zone
Both directions are the same (increase or decrease)
Become. At this time, the value of i-j is a predetermined reference time
Width (In this embodiment, "3" is set as the reference time width.
The output waveform of the light arm RA,
5 includes the intermediate voltage output P2 or P2 'of FIG.
Therefore, the second abnormality is detected in step S212a.
The count value Z2 is incremented by 1. On the other hand, when f = -fs, it is shown in FIG.
The direction of entry into the intermediate zone and the exit from the intermediate zone.
The outgoing direction is different. In this case, lighter
The output waveform of the mu RA must include the abnormal pulse P1 of FIG.
Therefore, in step S212a, the first abnormal
The numerical value Z1 is incremented by 1. Next, in step S212b, the direction flag is set.
The lag fs is reset and the inrush loop count value j is cleared
To be done. Then, the process proceeds to step S213. (5) When fp = f In this case, the previous sampling value V (i-1) and the subsequent sampling value
The pulling values V (i) are both within the same zone.
Therefore, no processing is performed, and the processing of step S214 is directly performed.
Proceed to. All samples in one cycle Ts
The above-mentioned processing is completed for the grouping values V (0) to V (N-1).
Then, i = N is determined in step S215, and
It proceeds to step S216. In step S216,
The number of passages Ka of a certain value voltage Va is a predetermined reference passage
It is determined whether or not the number of times K matches. In case of disagreement
Indicates that the output waveform of the write arm RA is the abnormal pulse P in FIG.
Since 3 is included, the first
The abnormal count value Z3 of 3 is incremented by 1. In step S216 described above,
If a match with the reference passage count value K is determined, or
When the processing of step S217 is completed, the next step S
Proceed to 218, and this time, the number K of passages of the threshold voltage Vb
b is determined to be equal to a predetermined reference passage number value K.
Be done. If they do not match, the output waveform of the write arm RA is
The abnormal pulse P1 or P3 of FIG. 5 is included.
Therefore, in step S219, the third abnormality count value Z3
It is incremented by 1. At step S218, the passing count value Kb and the reference
If a match with the passing count value K is determined, or if the step
If the process of step S219 is completed, then step S22 is performed.
The process proceeds to 0 and the total abnormality count value Z0 is calculated. This total
The abnormality count value Z0 is the first abnormality count value Z1 or the second abnormality count.
The weighted value Z2 and the third abnormal value Z3 are calculated.
It is obtained by linear combination. That is, the total number of times
The value Z0 is calculated by the following equation. Z0 = αZ1 + βZ2 + γZ3 In the above equation, α, β, γ are coefficient values for weighting
Is. In this way, the weighting calculation causes the total abnormality.
The number of rotations Z0 is determined by the first to third abnormalities.
Invar evaluated by the numbers Z1 to Z3
The degree of deterioration of the inverter 6 or the inverter control circuit 8 is 1: 1.
Because it does not correspond to. Therefore, each difference
Considering the degree of deterioration indicated by the number of times Z1 to Z3, the weight
By performing the addition calculation, the total
The total abnormality count value Z0 is calculated. The process of step S220 is completed.
Then, the process returns to the main routine of FIG. First,
In step S3, the total abnormality count value Z0 is 0.
It is determined whether or not. When the total error count value Z0 is not 0
That is, if some abnormal waveform occurs within the reference period,
If so, the process proceeds to step S4 and the deterioration degree index value Z is set.
The total count value Z0 is added. After that, in step S5
Go to processing. On the other hand, if the total abnormality count value Z0 is 0,
That is, there is no waveform abnormality within the reference period
If it does, skip step S4 and directly
Go to step S5. At step S5, the current time t and
The difference from the start time t0 is a predetermined time T (
It is judged whether or not it has exceeded 1 hour. The difference is
When it is shorter than the fixed time T, steps S2 to S4 are performed again.
The operation of is repeated. On the other hand, current time t and start time
If the difference from the time t0 exceeds the fixed time T, step S
Proceed to the process of 6. In step S6, the deterioration degree index value Z is displayed.
Displayed on the display device 318 and recorded on the recording device 319.
It Therefore, the user is
By looking at the magnitude or rate of increase of the degree index value Z,
How much the inverter 6 and the inverter control circuit 8 deteriorate
You can quantitatively know if it is progressing. Next, in step S7, the deterioration degree index
It is determined whether the value Z exceeds the predetermined allowable value M.
Be refused. When the deterioration index value Z is smaller than the allowable value M
If so, the operations of steps S1 to S6 are repeated again.
On the other hand, when the deterioration degree index value Z exceeds the allowable value M,
Proceed to step S8, and an alarm is issued by the alarm device 320.
To be That is, the inverter 6 or the inverter control
It is judged that the deterioration of the circuit 8 has progressed unacceptably.
This is notified to the user. Therefore use
Before the uninterruptible power supply completely fails,
6 and the inverter control circuit 8 are severely deteriorated.
The parts can be replaced before a failure occurs.
It becomes Noh. In the embodiment described above, the uninterruptible power supply is used.
6 used for power source device and inverter control
The degree of deterioration of the circuit 8 is diagnosed.
The invention is not limited to this, and other electronic circuits
The abnormal waveform of the can be detected to diagnose the degree of deterioration.
Of course it is possible. Further, in the above embodiment, the deterioration diagnosis device 15
Is an abnormality in the output signal of an electronic circuit that outputs a rectangular wave pulse
Detect the waveform and diagnose the degree of deterioration
However, the present invention is not limited to rectangular wave pulse
Waveform detection for electronic circuits that output sine waves
It can also be applied to diagnose the degree of progress of deterioration and deterioration. [0089] As described above, the deterioration diagnosis method of the present invention.
According to the device and the device, the degree of deterioration of the electronic circuit can be quantitatively determined.
Since it can be obtained as an index value,
Can clearly know the progress of deterioration of electronic circuits,
It is possible to eliminate unnecessary replacement of electronic circuits. Also,
Since it is possible to accurately predict the occurrence of failures, it is necessary to replace electronic circuits.
The system can be
It is possible to prevent the worst situation that abnormalities spread to the whole
it can. The present invention also provides an abnormal waveform detection method and device.
According to the above, the abnormal waveform in the signal can be detected extremely accurately.
And use the detection results effectively for the above-mentioned deterioration diagnosis.
You can

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing a configuration of an uninterruptible power supply device including a deterioration diagnosis device according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing a more detailed configuration of the inverter shown in FIG. FIG. 3 is a waveform diagram for explaining the operation of the inverter shown in FIGS. 1 and 2. FIG. 4 is a waveform diagram showing a typical example of an abnormal waveform included in the output of the inverter of FIGS. 1 and 2. 5 is a waveform for explaining the principle of detecting an abnormal waveform in the deterioration diagnostic device shown in FIG. FIG. 6 is a block diagram showing an example of a configuration of a deterioration diagnosis device shown in FIG. FIG. 7 is a block diagram showing another example of the configuration of the deterioration diagnostic device shown in FIG. 8 is a flow chart for explaining the operation of the deterioration diagnosis device shown in FIG. 9 is a flowchart showing a first part of a more detailed operation of the subroutine shown in FIG. 10 is a flowchart showing a second part of a more detailed operation of the subroutine shown in FIG. 11 is a flowchart showing a third part of a more detailed operation of the subroutine shown in FIG. FIG. 12 is a schematic diagram showing a first example of transition states of two sampled values to be compared. FIG. 13 is a schematic diagram showing a second example of transition states of two sampled values to be compared. FIG. 14 is a schematic diagram showing a third example of transition states of two sampled values to be compared. FIG. 15 is a schematic diagram showing a transition state of sampling values in the case where the direction of entry into the intermediate zone and the direction of exit thereof are the same. FIG. 16 is a schematic diagram showing a transition state of sampling values in the case where the direction of entry into the intermediate zone and the direction of exit thereof are opposite. [Explanation of Codes] 3: Rectifier 4: Smoothing circuit 6: Inverter 7: Storage battery 8: Inverter control circuit 9: Insulation transformer 10: AC filter 14: Changeover switch 15: Degradation diagnosis device LA: Left arm RA: Right arm TR1 to TR1 TR4: Transistor as switching element

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location H02H 7/12 K H02M 7/48 Z 9181-5H (72) Inventor Masumi Obata Minami Kyoto City Kyoto Prefecture Ward, Kichijoin Nishinosho Inonobabacho No. 1 within Japan Battery Co., Ltd. (72) Inventor Masaharu Umewaka No. 1 Kichijoin Nishinosho Inonobabacho No. 1 in Minami-ku, Kyoto City, Kyoto Prefecture Within Japan Battery Co., Ltd. (56) References Special Kaihei 3-35170 (JP, A) JP 63-100380 (JP, A) JP 62-145173 (JP, A) JP 3-248064 (JP, A) Actual break 63-81265 ( JP, U) Actual flat 2-26342 (JP, U) Actual flat 2-26821 (JP, U)

Claims (1)

Claim: What is claimed is: 1. An apparatus for detecting an abnormal waveform occurring in a signal in which the amplitude, the maximum level and the minimum level are always constant, wherein at least 2 is provided between the maximum level and the minimum level of the signal. Threshold value setting means for setting one threshold value, passage number detecting means for detecting the number of times the level of the signal passes each threshold value within a predetermined period, and passage number detecting means An abnormal waveform detecting device, comprising means for detecting an abnormal waveform in the signal by mutually comparing the number of times of passage for each threshold value. 2. An apparatus for detecting an abnormal waveform occurring in a signal whose amplitude, maximum level and minimum level are always constant, the threshold value being set between the maximum level and the minimum level of the signal. Setting means; passage number detecting means for detecting the number of times the level of the signal passes the threshold value within a predetermined period; reference passage number setting means for setting a reference passage number within the predetermined period; An abnormal waveform detecting device comprising: means for detecting an abnormal waveform in the signal by comparing the number of passages detected by the number of times detecting means with the reference number of passages set by the reference number of passages setting means. 3. An electronic circuit is inferior based on the waveform of the output signal.
Which is a device for diagnosing malfunction, for detecting an abnormal waveform in an output signal of the electronic circuit.
Abnormal waveform detection means and a counter for counting the number of abnormal waveform detections of the abnormal waveform detection means
And an abnormal waveform detecting means for detecting the maximum level and the minimum level of the output signal of the electronic circuit.
Threshold setting for setting at least two threshold between
Means and the level of the output signal of the electronic circuit is between the threshold values.
Time width detection means for detecting the time width when passing, reference time width setting means for setting the reference time width, time width detected by the time width detection means and the base
Compare with the reference time width set by the quasi-time width setting means.
By comparing, an abnormal wave in the output signal of the electronic circuit
Shape detecting means, and a counting result of the counting means is used for diagnosing the deterioration of the electronic circuit.
An electronic circuit deterioration diagnosing device characterized by being used as a target. 4. An electronic circuit is inferior based on the waveform of the output signal.
Which is a device for diagnosing malfunction, for detecting an abnormal waveform in an output signal of the electronic circuit.
Abnormal waveform detection means and a counter for counting the number of abnormal waveform detections of the abnormal waveform detection means
Number means, and the abnormal waveform detection means is at least between a maximum level and a minimum level of the signal.
Threshold setting means for setting two threshold values, and the level of the output signal of the electronic circuit within the predetermined period
Passing number detecting means for detecting the number of passing times of the threshold value
And each threshold value detected by the passage count detecting means
By comparing the number of passes for each
Means for detecting an abnormal waveform in the output signal of the slave circuit.
Only, the counting result of the counting means is used as a diagnostic finger for deterioration of the electronic circuit.
An electronic circuit deterioration diagnosing device characterized by being used as a target. 5. A defective electronic circuit based on a waveform of an output signal.
Which is a device for diagnosing malfunction, for detecting an abnormal waveform in an output signal of the electronic circuit.
Abnormal waveform detection means and a counter for counting the number of abnormal waveform detections of the abnormal waveform detection means
And an abnormal waveform detecting means for detecting the maximum level and the minimum level of the output signal of the electronic circuit.
Threshold setting means for setting a threshold between the level of the output signal of the electronic circuit within a predetermined period.
A passage number detecting means for detecting the number of passages of the threshold value and a reference passage for setting a reference passage number within the predetermined period.
The excess number setting means, and the number of passages detected by the passage number detecting means
Reference pass count set by the reference pass count setting means
By comparing with the number in the output signal of the electronic circuit
And a means for detecting an abnormal waveform of the electronic circuit, the result of counting by the counting means being used as a diagnostic command for deterioration of the electronic circuit.
An electronic circuit deterioration diagnosing device characterized by being used as a target. 6. An electronic circuit is inferior based on the waveform of an output signal.
Which is a device for diagnosing malfunction, for detecting an abnormal waveform in an output signal of the electronic circuit.
Abnormal waveform detection means and a counter for counting the number of abnormal waveform detections of the abnormal waveform detection means
And an abnormal waveform detecting means for detecting the maximum level and the minimum level of the output signal of the electronic circuit.
Threshold setting for setting first and second threshold values between
Means and the level of the output signal of the electronic circuit is the first and second
In the direction between the threshold values and immediately after that
Based on the agreement / disagreement with the direction that goes out between the two thresholds
To detect an abnormal waveform in the output signal of the electronic circuit.
And a diagnostic result for the deterioration of the electronic circuit based on the counting result of the counting means.
An electronic circuit deterioration diagnosing device characterized by being used as a target. 7. An electronic circuit is inferior based on the waveform of an output signal.
Which is a device for diagnosing malfunction, for detecting an abnormal waveform in an output signal of the electronic circuit.
Abnormal waveform detection means and a counter for counting the number of abnormal waveform detections of the abnormal waveform detection means
The number means and the counting result of said counting means every predetermined certain period of time
If the electronic circuit is abnormal when exceeds a predetermined value
Deterioration diagnosis device for electronic circuit, comprising:
Place 8. A method for detecting an abnormal waveform occurring in a signal whose amplitude, maximum level and minimum level are always constant, wherein at least two threshold values are set between the maximum level and the minimum level of the signal. However, by detecting the number of times the level of the signal passes each of the threshold values within a predetermined period, and comparing the number of times of passing for each of the detected threshold values with each other, an abnormal waveform in the signal A method for detecting an abnormal waveform, which comprises detecting 9. amplitude, a method of maximum and minimum levels are always detects an abnormal waveform occurring during a given signal, to set the threshold between the maximum and minimum levels of the signal, a predetermined time period An abnormal waveform in the signal is detected by detecting the number of times the level of the signal passes the threshold value, and comparing the detected number of passes with a reference number of passes within a preset predetermined period. A method for detecting an abnormal waveform, which comprises detecting 10. An electronic circuit based on a waveform of an output signal
A method of diagnosing deterioration, comprising a maximum level and a minimum level of an output signal of the electronic circuit.
Setting at least two threshold values between the electronic circuit
When the output signal level of passes through each of the above thresholds
The time width of the
The electronic circuit by comparing
The abnormal waveform in the output signal of the
By counting the number, a diagnostic finger for deterioration of the electronic circuit can be obtained.
A method for diagnosing deterioration of an electronic circuit, which is characterized by: 11. An electronic circuit based on a waveform of an output signal
A method of diagnosing deterioration, said method comprising: deciding at least between a maximum level and a minimum level of said signal.
By setting two thresholds, the electronic circuit
The number of times the output signal level passes each of the thresholds is detected.
The number of passes for each detected threshold
By comparing with each other, the output signal of the electronic circuit
Of abnormal waveforms is detected and the number of times the abnormal waveforms are detected is counted.
To be used as a diagnostic index for deterioration of the electronic circuit
A method for diagnosing deterioration of an electronic circuit, comprising: 12. An electronic circuit based on a waveform of an output signal
A method of diagnosing deterioration, comprising a maximum level and a minimum level of an output signal of the electronic circuit.
A threshold value is set during this period and the output of the electronic circuit
Detects the number of times the force signal level passes the threshold value
However, the detected number of passages and a preset period of time
By comparing with the reference number of passages in
Abnormal waveform in the output signal of the road is detected and the abnormal waveform is detected
Diagnosis of deterioration of the electronic circuit by counting the number of times
A method for diagnosing deterioration of electronic circuits, characterized by being used as an index
Law. 13. An electronic circuit based on a waveform of an output signal
A method of diagnosing deterioration, comprising a maximum level and a minimum level of an output signal of the electronic circuit.
A first threshold value and a second threshold value are set between
The output signal level of is between the first and second threshold values
The first and second thresholds in the direction of entry and shortly thereafter
Based on the agreement and disagreement with the direction from the
Abnormal waveform in the output signal of the road is detected and the abnormal waveform is detected
Diagnosis of deterioration of the electronic circuit by counting the number of times
A method for diagnosing deterioration of electronic circuits, characterized by being used as an index
Law. 14. An electronic circuit based on a waveform of an output signal
A method for diagnosing deterioration, which comprises detecting an abnormal waveform in an output signal of the electronic circuit,
Counts the number of ordinary waveforms detected and at predetermined fixed time intervals
When the counting result of exceeds the specified value, the electronic circuit
Deterioration of electronic circuit characterized by determining that it is normal
Diagnostic method.