CN109842086A - Arc photosensor self checking method and device, arc protection equipment based on triangular wave driving source - Google Patents
Arc photosensor self checking method and device, arc protection equipment based on triangular wave driving source Download PDFInfo
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Abstract
The invention discloses a kind of corresponding device of arc photosensor self checking method and method based on triangular wave driving source, the present invention can not only be realized based on self-test light and be detected to the on-off of light-sensitive element, it can also be realized according to the amplitude change rate for the detection signal that light-sensitive element exports and the linearity of light-sensitive element is detected, judge whether the degree of aging of light-sensitive element is up to standard by the linearity, to efficiently solve the problems, such as the ageing management of light-sensitive element；The present invention also provides a kind of realization of the circuit of arc photosensor self-checking unit based on triangular wave driving source and arc protection equipment; it can be used in realizing based on self-test light by increased self-test light luminescence unit and detection light acquisition process unit detects the on-off of light-sensitive element, is realized according to the amplitude change rate of the detection signal of light-sensitive element output and detected to the linearity of light-sensitive element, but also can be applied to other more self test modes for being potentially based on the realization of self-test light.
Description
Technical field
The invention belongs to field of relay protection in power, are related to the arc protection of electric system, and in particular to Yi Zhongji
Arc photosensor self checking method and device, arc protection equipment in triangular wave driving source.
Background technique
Currently, middle-low voltage switch cabinet bus protection mainly cuts off mother using the overcurrent protection in transform er backup protection
Line short trouble.But that there are fault clearing times is too long for this method, the problem of so as to cause the increasing of equipment damage degree.Power train
The basic principle of system arc protection is to make breaker actuation based on arc light and the double criterions of electric current to protect bus.The protection is low in
Pressure bus can cut off failure before electric arc photocombustion endangers and expands when breaking down, it is ensured that personnel safety and by breakdown loss
It minimizes.But the generally existing sensor due to caused by the outside environmental elements such as surface rusty stain of electric system arc light protecting device
Probe failure problem and due to false protection problem caused by sensor light axle offset or the bright variation of input, these are all reduced
Arc protection sensitivity and reliability.In order to avoid the generation of the above problem, it is necessary to sensor be added in arc protection
The self-checking function of probe makes sensor on the basis of keeping stable working condition, realizes what sensor may break down
It forecasts function and light source variation is avoided to cause false protection.
The self-test of traditional arc photosensor, as driving source, changes the frequency and duty of square-wave signal using square-wave signal
Than can be to the control of excitation source frequency and bright intensity.The driving source of the method only has bright, dark two states, and self-checking circuit
It is only capable of with " on-off " state of Measurement channel being according to the self-test for carrying out sensor.But light-sensitive element belongs to portion easy to aging
Part, the aging of light-sensitive element will lead to the forecast function of breaking down and light source variation avoided to cause false protection, therefore such as
What realizes the ageing management of arc photosensor, has become a key technical problem urgently to be resolved.
Summary of the invention
The technical problem to be solved in the present invention: it in view of the above problems in the prior art, provides a kind of based on triangle wave excitation
The corresponding device of arc photosensor self checking method and method in source, the present invention can not only be realized based on self-test light to light-sensitive element
On-off detection, additionally it is possible to realized according to the amplitude change rate of the detection signal of light-sensitive element output to the linearity of light-sensitive element
Detection, judges whether the degree of aging of light-sensitive element is up to standard by the linearity, to efficiently solve the old of light-sensitive element
The problem of changing detection；The present invention also provides a kind of circuit of arc photosensor self-checking unit based on triangular wave driving source realize with
And arc protection equipment, it can be aforementioned for the present invention by increased self-test light luminescence unit and detection light acquisition process unit
Arc photosensor self checking method based on triangular wave driving source provides underlying hardware condition, for based on the realization pair of self-test light
The on-off detection of light-sensitive element is realized according to the amplitude change rate of the detection signal of light-sensitive element output to the linear of light-sensitive element
Degree detection, but also other self test modes for being more potentially based on the realization of self-test light can be applied to.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
The present invention provides a kind of arc photosensor self checking method based on triangular wave driving source, and implementation steps include:
1) generating pumping signal by triangular wave driving source drives light source to issue to the light-sensitive element of target arc photosensor
Self-test light makes self-test light with fixed frequency f flashing and according to the amplitude consecutive variations of pumping signal consecutive variations occurs for brightness；
2) judge whether the detection signal that the light-sensitive element for receiving target arc photosensor exports, if receiving detection letter
It number then jumps and to execute step 3)；Otherwise determine the equipment fault of target arc photosensor and exit；
3) amplitude change rate for obtaining the detection signal of the light-sensitive element output of target arc photosensor, judges pumping signal
Amplitude change rate, detect signal both amplitude change rates it is whether consistent, the linearity of light-sensitive element is determined if consistent
It is up to standard；Otherwise, it is determined that the linearity of light-sensitive element is not up to standard.
Optionally, further include the steps that the amplitude that will test signal and preset threshold are compared in step 3), and if
The amplitude for detecting signal is greater than preset threshold, then determines that the detection signal of the light-sensitive element output of target arc photosensor is arc light
Signal, and target arc photosensor can normally receive arc optical signal.
It optionally, further include according to the photosensitive of the amplitude and frequency discrimination target arc photosensor for detecting signal in step 3)
The detection signal that element exports is the step of self-test light or environmental disturbances light, if the detection signal of light-sensitive element output is certainly
Perhaps environmental disturbances light then determines that target arc photosensor can normally receive self-test light or environmental disturbances light to inspection light.
Optionally, the detection signal of the light-sensitive element output of the resolution target arc photosensor is self-test light or environment
The detailed step of interference light includes: to judge whether the amplitude for detecting both signal, self-test light is consistent with frequency, if consistent
The detection signal for then determining the light-sensitive element output of target arc photosensor is self-test light；Otherwise, it is determined that target arc photosensor
Light-sensitive element output detection signal be environmental disturbances light.
It optionally, is pwm signal by the pumping signal that triangular wave driving source generates in step 1), pumping signal driving
Light source is LED light source.
The present invention also provides a kind of arc photosensor self checking methods based on triangular wave driving source, which is characterized in that including
For target arc photosensor light-sensitive element carry out the linearity detection the step of, specific implementation step includes: to pass through triangular wave
Driving source generates pumping signal and light source is driven to issue self-test light to the light-sensitive element of target arc photosensor, makes self-test light with fixation
Frequency f flashing and according to the amplitude consecutive variations of pumping signal consecutive variations occur for brightness；Obtain target arc photosensor
The amplitude change rate of the detection signal of light-sensitive element output；The amplitude change rate for judging pumping signal, the amplitude for detecting signal become
Whether both rates are consistent, determine that the linearity of light-sensitive element is up to standard if consistent, otherwise determine the linearity of light-sensitive element
It is not up to standard.
The present invention also provides a kind of arc photosensor self-checking unit based on triangular wave driving source, including microprocessor, institutes
State the step of microprocessor is programmed to perform the aforementioned arc photosensor self checking method based on triangular wave driving source；Or it is described
It is stored in the storage medium of microprocessor connection and is programmed to perform the aforementioned arc photosensor based on triangular wave driving source certainly
The computer program of detecting method.
The present invention also provides a kind of computer readable storage medium, it is stored with and is compiled in the computer readable storage medium
Journey is to execute the computer program of the aforementioned arc photosensor self checking method based on triangular wave driving source.
The present invention also provides a kind of arc photosensor self-checking unit based on triangular wave driving source, including self-test light are luminous single
Member and detection light acquisition process unit, the self-test light luminescence unit includes triangular wave driving circuit and light source interconnected,
The detection light acquisition process unit includes the sample circuit being sequentially connected, A/D converter circuit and main control unit, the sampling electricity
The input terminal on road with the output end of the light-sensitive element of target arc photosensor for being connected, and the output end of the sample circuit is successively
It is connected by sample circuit, A/D converter circuit with main control unit.
Optionally, the light source is arranged in the side of the light-sensitive element of target arc photosensor.
Optionally, the triangular wave driving circuit includes multivibrator and integrating circuit, and is connected on multivibrator
There is duty ratio adjusting circuit.
Optionally, the main control unit is programmed to perform the aforementioned arc photosensor based on triangular wave driving source from procuratorial organ
The step of method；Or be stored in the storage medium of main control unit connection be programmed to perform it is aforementioned based on triangle wave excitation
The computer program of the arc photosensor self checking method in source.
The present invention also provides a kind of arc protection equipment, the arc protection equipment has arc photosensor, the arc light
Protection equipment also has the aforementioned arc photosensor self-checking unit based on triangular wave driving source.
Compared to the prior art, it is corresponding that the present invention is based on the arc photosensor self checking methods and its method of triangular wave driving source
Device have an advantage that the present invention can not only be realized based on self-test light the on-off of light-sensitive element detected, additionally it is possible to root
It is realized according to the amplitude change rate of the detection signal of light-sensitive element output and the linearity of light-sensitive element is detected, sentenced by the linearity
Whether the degree of aging of disconnected light-sensitive element is up to standard, to efficiently solve the problems, such as the ageing management of light-sensitive element.
Compared to the prior art, the present invention is based on the circuit of the arc photosensor self-checking unit of triangular wave driving source realize with
And arc protection equipment has an advantage that self-test light luminescence unit and detection light acquisition process unit of the invention can be this
It invents the aforementioned arc photosensor self checking method based on triangular wave driving source and underlying hardware condition is provided, for being based on self-test
Light, which is realized, to be detected the on-off of light-sensitive element, is realized according to the amplitude change rate of the detection signal of light-sensitive element output to photosensitive member
The linearity of part detects, but also can be applied to other self test modes for being more potentially based on the realization of self-test light.
Detailed description of the invention
Fig. 1 is the basic schematic diagram of one method of the embodiment of the present invention.
Fig. 2 is the structure principle chart of one device of the embodiment of the present invention.
Fig. 3 is the circuit diagram of self-test light luminescence unit in the embodiment of the present invention one.
Fig. 4 is the current waveform contrast schematic diagram of multi-signal in the embodiment of the present invention one.
Fig. 5 is the quantization principles schematic diagram of A/D converter circuit in the embodiment of the present invention one.
Marginal data: 1, self-test light luminescence unit；2, detection light acquisition process unit；21, sample circuit；22, AD conversion
Circuit；23, main control unit.
Specific embodiment
Embodiment one:
As shown in Figure 1, the implementation steps of arc photosensor self checking method of the present embodiment based on triangular wave driving source include:
1) generating pumping signal by triangular wave driving source drives light source to issue to the light-sensitive element of target arc photosensor
Self-test light makes self-test light with fixed frequency f flashing and according to the amplitude consecutive variations of pumping signal consecutive variations occurs for brightness；
2) judge whether the detection signal that the light-sensitive element for receiving target arc photosensor exports, if receiving detection letter
It number then jumps and to execute step 3)；Otherwise determine the equipment fault of target arc photosensor and exit；
3) amplitude change rate for obtaining the detection signal of the light-sensitive element output of target arc photosensor, judges pumping signal
Amplitude change rate, detect signal both amplitude change rates (i.e. slope) it is whether consistent, determine light-sensitive element if consistent
The linearity it is up to standard；Otherwise, it is determined that the linearity of light-sensitive element is not up to standard；
In the present embodiment, the pumping signal generated in step 1) by triangular wave driving source is pwm signal, and pumping signal is driven
Dynamic light source is LED light source, the pumping signal of other forms furthermore also can be generated, and use other kinds of light source.
Further include the steps that the amplitude that will test signal and preset threshold are compared in the present embodiment, in step 3), and
If the amplitude for detecting signal is greater than preset threshold, determine that the detection signal of the light-sensitive element output of target arc photosensor is
Arc optical signal, and target arc photosensor can normally receive arc optical signal.In the present embodiment, preset threshold value is
10000Lux。
It further include the amplitude and frequency discrimination target arc photosensor according to detection signal in the present embodiment, in step 3)
The detection signal of light-sensitive element output is the step of self-test light or environmental disturbances light, if the detection signal of light-sensitive element output
For self-test light, perhaps environmental disturbances light then determines that target arc photosensor can normally receive self-test light or environmental disturbances light.
It should be noted that the step of each detection judges in step 3) can according to need and adjust its tandem, Fig. 1
Shown in actual order be only the sequence example preferably used in the present embodiment.
In the present embodiment, both the amplitude change rate of pumping signal, the amplitude change rate for detecting signal are judged in step 4)
Whether it is consistent when specifically refer to judge both the amplitude change rate of pumping signal, the amplitude change rate for detecting signal error whether
Less than preset threshold, the specific value of the preset threshold is ± 20% in the present embodiment, if triangular wave rises or falls slope work
It is equal to 1 after normalized, then detects the amplitude change rate of signal within the 0.8~1.2 of the amplitude change rate of pumping signal
Then illustrate that sensor linearity is met the requirements.Unquestionably, it in the case that preset threshold value is 0, is as severe in judgment and sentences
Whether both the amplitude change rate of disconnected pumping signal, the amplitude change rate for detecting signal are identical.It is different from currently used use
Self checking method of the square wave as driving source, the present embodiment, as driving source, can constantly measure self-checking light source using triangular wave
Frequency can also measure the linearity of light source amplitude variation.To judge the on-off in arc photosensor measurement circuit simultaneously and adopt
The precision of sample.If the light intensity data of detection signal is stored in light intensity array A [N], the linearity amplitude of certain moment light intensity
Differential value dA/dt is indicated, then can be indicated are as follows:
In above formula, dA/dt indicates the amplitude change rate of the detection signal at K moment, and A [K] is K instance sample value, A [K-M]
For the sampled value in M sampling interval before the K moment, TsFor the sampling period.
In the present embodiment, the detection signal of the light-sensitive element output of resolution target arc photosensor is self-test light or environment
The detailed step of interference light includes: to judge whether the amplitude for detecting both signal, self-test light is consistent with frequency, if consistent
The detection signal for then determining the light-sensitive element output of target arc photosensor is self-test light；Otherwise, it is determined that target arc photosensor
Light-sensitive element output detection signal be environmental disturbances light.
Arc photosensor is typically mounted in the switch of closed dark, and environmental light intensity is close to 0Lux.Indoor Natural light intensity
Generally in 1000Lux or so, it is assumed that the triangular wave rate of rise is 1, and most bright peak light intensity is 4000Lux, is continuously adopted to triangular wave
Sample calculates average intensity using trapezoidal integration, and average intensity should be 2000Lux.This threshold value had both been far below failure arc light
Signal, and it is much larger than normal environment light.Measurement error is considered, using 1600Lux~2400Lux as the amplitude model of self-test light
It encloses.
If the light intensity data of detection signal is stored in light intensity array A [N], the width of detection signal can be calculated according to the following formula
Value；
In above formula, AMIndicate the amplitude of detection signal, A [k] indicates k-th of value in light intensity array A [N], and N is light intensity
Light intensity data quantity in array A [N].Detect the amplitude A of signalMMeet 1600Lux≤AM≤ 2400Lux, then detect signal
Amplitude is consistent with the amplitude of self-test light；In the present embodiment, the fixed frequency f of triangular wave is set as 50Hz, when the frequency of detection signal
Rate f1Meet 49.5Hz≤f1Think that the frequency for detecting signal is consistent with the frequency of self-test light when≤50.5Hz.
It is micro- the present embodiment provides a kind of arc photosensor self-checking unit based on triangular wave driving source, including microprocessor
Processor is programmed to perform the step of aforementioned arc photosensor self checking method based on triangular wave driving source；Or microprocessor
It is stored in the storage medium of connection and is programmed to perform the aforementioned arc photosensor self checking method based on triangular wave driving source
Computer program.
The present embodiment provides a kind of computer readable storage medium, it is stored with and is programmed in computer readable storage medium
Execute the computer program of the aforementioned arc photosensor self checking method based on triangular wave driving source.
As the present invention is based on the realizations of the circuit of the arc photosensor self-checking unit of triangular wave driving source, as shown in Fig. 2, should
Arc photosensor self-checking unit includes self-test light luminescence unit 1 and detection light acquisition process unit 2, and self-test light luminescence unit 1 wraps
Include triangular wave driving circuit and light source interconnected, detection light acquisition process unit 2 include the sample circuit 21 being sequentially connected,
A/D converter circuit 22 and main control unit 23, the output end of the light-sensitive element of the input terminal and target arc photosensor of sample circuit 21
It is connected, the output end of sample circuit 21 is used to pass sequentially through sample circuit 21, A/D converter circuit 22 is connected with main control unit 23.This
In embodiment, detection light acquisition process unit 2 was both used as self-test light signal collection and processor as self-test light luminescence unit 1
Structure, while the protection mechanism also as arc protection equipment where arc photosensor, can be improved in this way integrated level and reduce at
This, unquestionable detection light acquisition process unit 2 can also be using the independent part of the protection mechanism independently of arc protection equipment
Part.
In the present embodiment, light source is arranged in the side of the light-sensitive element of target arc photosensor, it can be ensured that light source and mesh
The self-test light amplitude marked between the light-sensitive element of arc photosensor is undamped.
In the present embodiment, triangular wave driving circuit includes multivibrator and integrating circuit, and is connected on multivibrator
There is duty ratio adjusting circuit.In the present embodiment, triangular wave driving circuit is that circuit, light source LED occur for the PWM of triangular wave driving
Lamp.
As shown in figure 3, multivibrator using 555 timers realize, No. 3 pins as output end output voltage Vo simultaneously
It is serially connected with the second capacitor C2, 6, No. 7 pins are used to adjust the control voltage of multivibrator, and then realize duty cycle adjustment.
4, No. 8 pins of 555 timers are connected with power Vcc respectively, and No. 1 pin ground connection, No. 4 pins also pass through first capacitor C1It connects
Ground, No. 2 pins are connected with power supply Vc and pass through third capacitor C3Ground connection.Duty ratio adjusting circuit is first resistor, sliding variable resistance
Device, second resistance electric resistance partial pressure in series adjust circuit, which adjusts circuit and be connected on power Vcc and power supply Vc
Between, first resistor, slide rheostat adjusting terminal can be considered slide rheostat is divided into two sub- resistance, a sub- resistance
It connects to form the first equivalent resistance R with first resistor1, another sub- resistance and second resistance connect to form the first equivalent resistance R2,
First equivalent resistance R1, the first equivalent resistance R2The ratio of the two realizes the 6 of 555 timers, No. 7 pin voltage allocation proportions.
As shown in figure 3, integrating circuit is by voltage amplifier, resistance R3, resistance R4 and the 4th capacitor C4Composition, voltage Vo pass through resistance R3
The negative input of input voltage amplifier, the electrode input end ground connection of voltage amplifier, the negative input of voltage amplifier
Pass through the 4th capacitor C4It is connected with the output end of voltage amplifier, the output end output voltage V of voltage amplifier2, output voltage V2
The pumping signal (pwm signal) as generated by triangular wave driving source, for driving light source luminescent.
Triangular wave driving circuit constitutes multivibrator using 555 timers and generates the adjustable square wave of duty ratio, generation side
After wave, the adjustable square wave of duty ratio is converted into the adjustable triangular wave of duty ratio with the integrating circuit that operational amplifier is constituted.
Referring to Fig. 3, due to diode D2Guiding function, for electric resistance partial pressure adjust circuit ground side third capacitor C3Charging when
Between constant be τ1=R1C3, discharge time constant τ2=R2C3, wherein R1For the first equivalent resistance R1Resistance value, C3For third electricity
Hold C3Resistance value；It can thus be concluded that third capacitor C3Charging time T1=0.7R1C3, discharge time T2=0.7R2C3.Therefore,
The fixed frequency f for the square wave that 555 timers generate are as follows:
In above formula, C3For third capacitor C3Resistance value, R1For the first equivalent resistance R1Resistance value, R2For the first equivalent electricity
Hinder R2Resistance value.
The duty ratio q for the square wave that 555 timers generate are as follows:
In above formula, T is period, T1For third capacitor C3Charging time, T2For third capacitor C3Discharge time be C3For
Third capacitor C3Resistance value, R1For the first equivalent resistance R1Resistance value, R2For the first equivalent resistance R2Resistance value.Therefore only
The i.e. changeable duty ratio in position for changing current potential sliding end, when the slide plate position for changing the slide rheostat in multi-resonant oscillating circuit
When setting, the duty ratio of triangular wave will change.
For LED light, to realize to the simplest method of the brightness regulation of LED to be exactly to adjust to flow through its forward current
IdSize.In general, the luminous intensity of LED component is all the increase with forward current and increases.It is now widely used
LED light regulating technology is all based on PWM to adjust LED luminance.PWM (Pulse Width Modulation) control technology is exactly
To the technology that the width of pulse is modulated, i.e., by being modulated to a series of width of pulses, come needed for equivalent acquisition
The waveform wanted (containing shape and amplitude).The waveform that the driving circuit of the present embodiment design issues meets PWM mode, passes through change
The duty ratio of triangular wave is the changeable forward current by LED light to change the brightness of LED light.The duty ratio of triangular wave is got over
Greatly, LED luminance is stronger；The duty ratio of triangular wave is smaller, and LED luminance is weaker.In general, the operating current of LED is typically chosen in
15mA or so, the electro-optical efficiency of LED is higher at this time, and light decay electric current is reasonable.In the present embodiment, the duty of triangular wave is selected
Than q=0.5, and set ImaxFor the maximum current for flowing through LED, Id=ImaxQ is the forward current (operating current) for flowing through LED.
At this point, electric current i.e. PWM waveform and LED that triangular wave, the LED of the square wave of multivibrator output, driving circuit output pass through
Average operating current, successively as shown in (a), (b), (c) and (d) in Fig. 4.In Fig. 4, t is the positive pulse duration；T
For a duty cycle；H is triangle crest value.
The AD conversion that A/D converter circuit 22 carries out is analog voltage or electric current to be converted into digital quantity proportional therewith
Process.AD conversion generally comprises sampling, keeps, and quantization encodes this Four processes.Some converters do not need holding circuit,
Quantization and coding are usually completed in conversion process.Sampling is the process for carrying out periodically extracting sample value to analog signal.For
Restore original analog signal without distortion, sample frequency should be not less than twice of highest frequency in input analog signal frequency spectrum.It adopts
The linearity of sample circuit 21 is better, and sampling gained waveform is higher to the reduction degree of original analog signal, on the contrary.Therefore the present embodiment is adopted
Triangular wave can test to the linearity of sampling element.Quantization is done analog signal at rounding by quantization unit
Reason.N value, referred to as quantum step are divided by zero to maximum value simulation input range.And between adjacent quantization ladder
Midrange is known as comparative level.The sampling and quantization of signal are realized by ADC.Quantizing process is as shown in figure 5, wherein t is expressed as
Time, f (t) are respectively the simulation value before quantifying and the simulation value after quantization.Coding uses the simulation value after quantization
Binary code or other codings are to indicate to reduce data volume.
In the present embodiment, 555 timers and the integrating circuit composition triangular wave driving circuit (PWM of triangular wave driving are utilized
Circuit occurs), the triangular wave frequency which issues is fixed, and meet the PWM driving method of LED light, i.e., its
The self-test optical flare frequency that driving LED is issued is fixed, and lamplight brightness is modulated to normal arc light is significantly lower than, to offset
False protection caused by the factors such as external interference light.In view of the consecutive variations of triangle wave amplitude, which is enabled
The self-test light that LED is issued also has the characteristic of brightness consecutive variations, so that it be made to have the energy of the linearity of detection acquisition elements
Power.Light-sensitive element receives all optical signals, and the optical signal that sample circuit 21 captures light-sensitive element stores and amplifies and incite somebody to action
It passes to conversion element and is converted into electric signal, and the electric signal after conversion is sent to main control unit 23 by A/D converter circuit 22, and by
Main control unit 23 judges the signal, and self-test is completed.When arc fault not occurring, light-sensitive element can detect self-test light
With other interference optical signals.Sampling element, then will converting optical signal into electric signal by conversion element after signal amplification storage
It passes to main control unit and is judged.If the variation of signal frequency, amplitude is consistent with self-test light, for self-test light；If signal frequency
Rate and self-test light are inconsistent, then interfere light for day ordinary light or natural light etc.；If signal amplitude variation is inconsistent with self-test light, adopt
The linearity for collecting element is poor, can choose replacement acquisition elements.These three situations illustrate the normal work of arc photosensor probe
Make, arc protection is failure to actuate.When arc short-circuit occurs, light-sensitive element receives self-test light and arc light.The intensity of arclight is bright at this time
Aobvious to be higher than self-test light, thus main control unit judges electric signal, i.e., generation arc short-circuit, arc light protecting system move immediately
Make.If main control unit does not receive any electric signal, can determine whether as tip damage, light-sensitive element can not receive optical signal, or
It is disconnection fault inside telemetry circuit.Operator should overhaul in time at this time, or replacement fault element.
In the present embodiment, main control unit 23 is programmed to perform the aforementioned arc photosensor self-test based on triangular wave driving source
The step of method；Or be stored in the storage medium that connects of main control unit 23 be programmed to perform it is aforementioned based on triangle wave excitation
The computer program of the arc photosensor self checking method in source.
The present embodiment also provides a kind of arc protection equipment, which has arc photosensor, which protects
Shield equipment also has the aforementioned arc photosensor self-checking unit based on triangular wave driving source.
In conclusion the present embodiment uses triangular wave as exciting signal source, it is main due to the amplitude consecutive variations of triangular wave
Control unit can not only measure the frequency of triangular wave, the slope that can also be risen or fallen by AD sampled measurements triangle wave voltage
Judge the linearity of photosensitive acquisition circuit, to both may determine that " on-off " of arc light acquisition circuit, arc light can also be verified
" linearity " for measuring circuit can allow self-checking light source to be different from just by the frequency of triangular wave and the amplitude setting of triangular wave
Normal arc optical signal, the false protection avoided have frequency and light based on the arc photosensor self-test that triangular wave is driving source
Strong double criterions increase the inspection to sample circuit " linearity " on the basis of judging Measurement channel " on-off " state, so that
It is more comprehensive to the self-checking function of light-sensitive element.
Embodiment two:
The present embodiment is the subset of embodiment one, the skill of the present embodiment different from the systemic solution of embodiment one
Art scheme is only embodiment one based on being directed to target arc photosensor in the arc photosensor self checking method of triangular wave driving source
Light-sensitive element carry out the linearity detection the step of.
The present embodiment for target arc photosensor light-sensitive element carry out linearity detection specific implementation step include:
Generating pumping signal by triangular wave driving source drives light source to issue self-test light to the light-sensitive element of target arc photosensor, makes certainly
Inspection light is with fixed frequency f flashing and according to the amplitude consecutive variations of pumping signal consecutive variations occur for brightness；Obtain target arc
The amplitude change rate of the detection signal of the light-sensitive element output of optical sensor；Judge amplitude change rate, the detection letter of pumping signal
Number both amplitude change rates it is whether consistent, determine that the linearity of light-sensitive element is up to standard if consistent, otherwise determine photosensitive member
The linearity of part is not up to standard.It is pwm signal, pumping signal by the pumping signal that triangular wave driving source generates in the present embodiment
The light source of driving is LED light source, furthermore also can according to need the pumping signal for generating other forms and using other types
Light source.
The device of the present embodiment is then identical with embodiment one, equally includes following proposal:
It is micro- the present embodiment provides a kind of arc photosensor self-checking unit based on triangular wave driving source, including microprocessor
Processor is programmed to perform the step of aforementioned arc photosensor self checking method based on triangular wave driving source；Or microprocessor
It is stored in the storage medium of connection and is programmed to perform the aforementioned arc photosensor self checking method based on triangular wave driving source
Computer program.
The present embodiment provides a kind of computer readable storage medium, it is stored with and is programmed in computer readable storage medium
Execute the computer program of the aforementioned arc photosensor self checking method based on triangular wave driving source.
The present embodiment provides a kind of arc photosensor self-checking unit based on triangular wave driving source, including self-test light are luminous single
Member 1 and detection light acquisition process unit 2, self-test light luminescence unit 1 include triangular wave driving circuit interconnected and light source, and
Light source is arranged in the side of the light-sensitive element of target arc photosensor, and detection light acquisition process unit 2 is adopted including what is be sequentially connected
Sample circuit 21, A/D converter circuit 22 and main control unit 23, the input terminal of sample circuit 21 and the photosensitive member of target arc photosensor
The output end of part is connected, and the output end of sample circuit 21 passes sequentially through sample circuit 21, A/D converter circuit 22 and main control unit 23
It is connected.In the present embodiment, triangular wave driving circuit includes multivibrator and integrating circuit, and is connected with and accounts on multivibrator
Sky is than adjusting circuit.In the present embodiment, main control unit 23 is programmed to perform the aforementioned arc light sensor based on triangular wave driving source
The step of device self checking method；Or be stored in the storage medium that connects of main control unit 23 be programmed to perform it is aforementioned based on triangle
The computer program of the arc photosensor self checking method in wave excitation source.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (13)
1. a kind of arc photosensor self checking method based on triangular wave driving source, which is characterized in that implementation steps include:
1) generating pumping signal by triangular wave driving source drives light source to issue self-test to the light-sensitive element of target arc photosensor
Light makes self-test light with fixed frequency f flashing and according to the amplitude consecutive variations of pumping signal consecutive variations occurs for brightness；
2) judge whether the detection signal that the light-sensitive element for receiving target arc photosensor exports, if receiving detection signal
It jumps and executes step 3)；Otherwise determine the equipment fault of target arc photosensor and exit；
3) amplitude change rate for obtaining the detection signal of the light-sensitive element output of target arc photosensor, judges the width of pumping signal
Whether consistent it is worth both change rate, the amplitude change rate for detecting signal, determines that the linearity of light-sensitive element is up to standard if consistent；
Otherwise, it is determined that the linearity of light-sensitive element is not up to standard.
2. according to claim 1 based on the arc photosensor self checking method of triangular wave driving source, which is characterized in that step 3)
In further include the steps that the amplitude that will test signal and preset threshold are compared, and if the amplitude of detection signal be greater than it is default
Threshold value then determines that the detection signal of the light-sensitive element output of target arc photosensor is arc optical signal, and target arc photosensor
Arc optical signal can be normally received.
3. according to claim 1 based on the arc photosensor self checking method of triangular wave driving source, which is characterized in that step 3)
In further include according to detection signal amplitude and frequency discrimination target arc photosensor light-sensitive element output detection signal be
If self-test light perhaps environmental disturbances light step light-sensitive element output detection signal be self-test light or environmental disturbances light,
Then determine that target arc photosensor can normally receive self-test light or environmental disturbances light.
4. according to claim 3 based on the arc photosensor self checking method of triangular wave driving source, which is characterized in that described point
The detection signal for distinguishing the light-sensitive element output of target arc photosensor includes: for the detailed step of self-test light or environmental disturbances light
Judge to detect signal, the amplitude of both self-test light it is whether consistent with frequency, if unanimously if determine target arc photosensor
Light-sensitive element output detection signal be self-test light；Otherwise, it is determined that the detection that the light-sensitive element of target arc photosensor exports
Signal is environmental disturbances light.
5. the arc photosensor self checking method according to claim 1 based on triangular wave driving source, which is characterized in that step
1) pumping signal generated in by triangular wave driving source is pwm signal, and the light source of pumping signal driving is LED light source.
6. a kind of arc photosensor self checking method based on triangular wave driving source, which is characterized in that including being passed for target arc light
The light-sensitive element of sensor carries out the step of linearity detection, and specific implementation step includes: to generate to motivate by triangular wave driving source
Signal drive light source to the light-sensitive element of target arc photosensor issue self-test light, make self-test light with fixed frequency f flashing and it is bright
According to the amplitude consecutive variations of pumping signal consecutive variations occur for degree；Obtain the light-sensitive element output of target arc photosensor
Detect the amplitude change rate of signal；Judge the amplitude change rate of pumping signal, detect signal both amplitude change rates whether one
It causes, determines that the linearity of light-sensitive element is up to standard if consistent, otherwise determine that the linearity of light-sensitive element is not up to standard.
7. a kind of arc photosensor self-checking unit based on triangular wave driving source, including microprocessor, it is characterised in that: described micro-
Processor is programmed to perform the arc photosensor self-test described in any one of claim 1~6 based on triangular wave driving source
The step of method；Or it is stored with to be programmed to perform in claim 1~6 in the storage medium of the microprocessor connection and appoint
The computer program of arc photosensor self checking method based on triangular wave driving source described in meaning one.
8. a kind of computer readable storage medium, it is characterised in that: be stored with and be programmed in the computer readable storage medium
With the computer of the arc photosensor self checking method based on triangular wave driving source described in any one of perform claim requirement 1~6
Program.
9. a kind of arc photosensor self-checking unit based on triangular wave driving source, including self-test light luminescence unit (1) and detection light
Acquisition process unit (2), the self-test light luminescence unit (1) include triangular wave driving circuit and light source interconnected, and institute
Stating detection light acquisition process unit (2) includes the sample circuit (21) being sequentially connected, A/D converter circuit (22) and main control unit
(23), the input terminal of the sample circuit (21) is described for being connected with the output end of the light-sensitive element of target arc photosensor
The output end of sample circuit (21) passes sequentially through sample circuit (21), A/D converter circuit (22) is connected with main control unit (23).
10. according to claim 9 based on the arc photosensor self-checking unit of triangular wave driving source, which is characterized in that described
Light source is arranged in the side of the light-sensitive element of target arc photosensor.
11. according to claim 9 based on the arc photosensor self-checking unit of triangular wave driving source, which is characterized in that described
Triangular wave driving circuit includes multivibrator and integrating circuit, and duty ratio adjusting circuit is connected on multivibrator.
12. according to claim 9 based on the arc photosensor self-checking unit of triangular wave driving source, which is characterized in that described
Main control unit (23) is programmed to perform the arc light sensor based on triangular wave driving source described in any one of claim 1~6
The step of device self checking method；Or it is stored in the storage medium of the main control unit (23) connection and is programmed to perform right and wants
The computer program of arc photosensor self checking method described in asking any one of 1~6 based on triangular wave driving source.
13. a kind of arc protection equipment, the arc protection equipment has arc photosensor, which is characterized in that the arc light is protected
Shield equipment also has the arc photosensor self-checking unit described in any one of claim 9~12 based on triangular wave driving source.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305455A (en) * | 2020-12-29 | 2021-02-02 | 成都工百利自动化设备有限公司 | Double-fiber arc light detection sensor based on coded pulse signals |
| CN113721117A (en) * | 2021-09-08 | 2021-11-30 | 扬州市银建电气有限公司 | Transformer partial discharge induction withstand voltage test device |
| EP4113136A1 (en) * | 2021-06-29 | 2023-01-04 | Abb Schweiz Ag | Testing an arc detecting system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309370A (en) * | 2008-07-09 | 2008-11-19 | 中国科学院长春光学精密机械与物理研究所 | Photoelectric conversion simulating device of TDI CCD apparatus and method thereof |
| CN101815393A (en) * | 2009-02-24 | 2010-08-25 | 松下电工株式会社 | Discharge lamp illuminator and have the lighting apparatus of this device |
| CN102589689A (en) * | 2012-03-12 | 2012-07-18 | 南京五石金传感技术有限公司 | Optical fiber electric arc optical detection device with self-checking function and detection method thereof |
| CN102959410A (en) * | 2009-12-11 | 2013-03-06 | 阿尔斯通技术有限公司 | Method for arc detection and devices thereof |
| CN103580005A (en) * | 2013-10-31 | 2014-02-12 | 云南电力试验研究院（集团）有限公司电力研究院 | Novel arc light protection method |
| CN104501851A (en) * | 2014-12-05 | 2015-04-08 | 广东美的制冷设备有限公司 | Self-checking circuit, self-checking method and self-checking system for photosensitive element as well as air conditioner |
| CN204575196U (en) * | 2015-04-08 | 2015-08-19 | 国家电网公司 | A kind of arclight signal self-checking unit |
| CN106817471A (en) * | 2017-01-20 | 2017-06-09 | 上海卓易科技股份有限公司 | A kind of detection method and system based on mobile terminal light sensor |
| CN206369772U (en) * | 2016-11-30 | 2017-08-01 | 西门子公司 | Electric arc optical detection device and switch cubicle |
| US9894731B2 (en) * | 2015-10-14 | 2018-02-13 | Continental Automotive Gmbh | Method and circuit apparatus for detecting a failure of at least one light emitting diode in a light emitting diode arrangement |
| CN108963957A (en) * | 2018-06-29 | 2018-12-07 | 国网湖南省电力有限公司 | Middle-low voltage switch cabinet arc photosensor self checking method and arc protection equipment |
| CN109066601A (en) * | 2018-08-24 | 2018-12-21 | 南京南瑞继保电气有限公司 | A kind of middle-low voltage switch cabinet arc light protection method and system and arc light acquisition unit |
-
2019
- 2019-01-25 CN CN201910072425.6A patent/CN109842086B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309370A (en) * | 2008-07-09 | 2008-11-19 | 中国科学院长春光学精密机械与物理研究所 | Photoelectric conversion simulating device of TDI CCD apparatus and method thereof |
| CN101815393A (en) * | 2009-02-24 | 2010-08-25 | 松下电工株式会社 | Discharge lamp illuminator and have the lighting apparatus of this device |
| CN102959410A (en) * | 2009-12-11 | 2013-03-06 | 阿尔斯通技术有限公司 | Method for arc detection and devices thereof |
| CN102589689A (en) * | 2012-03-12 | 2012-07-18 | 南京五石金传感技术有限公司 | Optical fiber electric arc optical detection device with self-checking function and detection method thereof |
| CN103580005A (en) * | 2013-10-31 | 2014-02-12 | 云南电力试验研究院（集团）有限公司电力研究院 | Novel arc light protection method |
| CN104501851A (en) * | 2014-12-05 | 2015-04-08 | 广东美的制冷设备有限公司 | Self-checking circuit, self-checking method and self-checking system for photosensitive element as well as air conditioner |
| CN204575196U (en) * | 2015-04-08 | 2015-08-19 | 国家电网公司 | A kind of arclight signal self-checking unit |
| US9894731B2 (en) * | 2015-10-14 | 2018-02-13 | Continental Automotive Gmbh | Method and circuit apparatus for detecting a failure of at least one light emitting diode in a light emitting diode arrangement |
| CN206369772U (en) * | 2016-11-30 | 2017-08-01 | 西门子公司 | Electric arc optical detection device and switch cubicle |
| CN106817471A (en) * | 2017-01-20 | 2017-06-09 | 上海卓易科技股份有限公司 | A kind of detection method and system based on mobile terminal light sensor |
| CN108963957A (en) * | 2018-06-29 | 2018-12-07 | 国网湖南省电力有限公司 | Middle-low voltage switch cabinet arc photosensor self checking method and arc protection equipment |
| CN109066601A (en) * | 2018-08-24 | 2018-12-21 | 南京南瑞继保电气有限公司 | A kind of middle-low voltage switch cabinet arc light protection method and system and arc light acquisition unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305455A (en) * | 2020-12-29 | 2021-02-02 | 成都工百利自动化设备有限公司 | Double-fiber arc light detection sensor based on coded pulse signals |
| EP4113136A1 (en) * | 2021-06-29 | 2023-01-04 | Abb Schweiz Ag | Testing an arc detecting system |
| WO2023274615A1 (en) | 2021-06-29 | 2023-01-05 | Abb Schweiz Ag | Testing an arc detecting system |
| CN113721117A (en) * | 2021-09-08 | 2021-11-30 | 扬州市银建电气有限公司 | Transformer partial discharge induction withstand voltage test device |
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