CN109085482A - A kind of abnormal discharge of power equipment detection circuit - Google Patents
A kind of abnormal discharge of power equipment detection circuit Download PDFInfo
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- CN109085482A CN109085482A CN201811243353.9A CN201811243353A CN109085482A CN 109085482 A CN109085482 A CN 109085482A CN 201811243353 A CN201811243353 A CN 201811243353A CN 109085482 A CN109085482 A CN 109085482A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
This application provides a kind of abnormal discharge of power equipment detection circuits, for solving the problems, such as that abnormal discharge of power equipment cannot be detected accurately, it include: UV sensor, first operation amplifier circuit, integrating circuit, comparator circuit, pulse counter circuit, single-chip microcontroller and display, the UV sensor is connect with the positive input of first operation amplifier circuit, the output end of first operation amplifier circuit is connect with the input terminal of the integrating circuit, the output end of the integrating circuit is connect with the input terminal of the comparator circuit, the output end of the comparator circuit is connect with the input terminal of the pulse counter circuit.
Description
Technical field
This application involves technical field of electric power detection, relate generally to a kind of abnormal discharge of power equipment detection circuit.
Background technique
It is in high-voltage isulation that shelf depreciation occurs under the action of strong electrical field for certain weak parts in Electric Power Equipment Insulation
Common problem.Although shelf depreciation will not generally cause the penetrability breakdown of insulation, dielectric can be led to, especially
It is organic dielectric local damage.If shelf depreciation long-term existence, it will lead to insulation degradation under certain condition and even puncture,
Local anomaly discharge examination is carried out to power equipment, is not only able to understand the insulation status of equipment, moreover it is possible to which discovery many has in time
The reason of closing manufacture and the problem of installation, determining insulation fault and its severity.
The detection of abnormal discharge of power equipment at present is usually to pass through infrared thermography and ultraviolet image method, it is infrared heat at
As method due between target and detector environment and distance influence detection system performance, the carbon dioxide, steam in atmosphere
Equal molecules and sunlight also have extreme influence to the transmission of infrared energy；And ultraviolet image method is difficult to capture discharge signal
Variation, causes the not high problem of the detection accuracy of abnormal discharge of power equipment.
Summary of the invention
The application's is designed to provide a kind of abnormal discharge of power equipment detection circuit, for solving power equipment exception
The problem of electric discharge cannot be detected accurately.
To achieve the goals above, it is as follows that this application provides following technical schemes:
This application provides a kind of abnormal discharge of power equipment detection circuits, comprising: UV sensor, the first operation are put
Big device circuit, integrating circuit, comparator circuit, pulse counter circuit, single-chip microcontroller and display, the UV sensor
Connect with the positive input of first operation amplifier circuit, the output end of first operation amplifier circuit with it is described
The input terminal of integrating circuit connects, and the output end of the integrating circuit is connect with the input terminal of the comparator circuit, the ratio
It is connect compared with the output end of device circuit with the input terminal of the pulse counter circuit,
The UV sensor, the ultraviolet light discharged for receiving abnormal discharge of power equipment, and will be described ultraviolet
Light is converted into pulsed current signal and is transferred to first operation amplifier circuit；
First operation amplifier circuit will for receiving the pulsed current signal of the UV sensor transmission
The pulsed current signal carries out signal amplification, and amplified pulsed current signal is transferred to the integrating circuit；
The integrating circuit will for receiving the amplified pulsed current signal of the first operational amplifier transmission
The amplified pulsed current signal is gently changed, and the pulsed current signal after gentleization is transferred to the comparator electricity
Road；
The comparator circuit passes through setting for receiving the pulsed current signal after the integrating circuit is gently changed
Threshold value filters out effective pulsed current signal, and the effective pulsed current signal is transferred to the pulse counter electricity
Road；
The pulse counter circuit passes through the effective pulse for receiving the effective pulsed current signal
Current signal is counted, and is obtained the quantity of ultraviolet light pulse according to the data counted to get, is utilized the quantity of ultraviolet light pulse
To characterize the degree of abnormal discharge of power equipment.
The circuit of above scheme design, the abnormal discharge of power equipment detection circuit that above-mentioned design obtains, the first operation are put
The pulsed current signal intensity that big device circuit generates Ultraviolet sensor increases, so that pulsed current signal is more firm, integral
Circuit is arranged between the first operation amplifier circuit and comparator circuit, so that pulsed current signal is gently changed, reduces other
Interference of the factor to pulsed current signal, substantially increases detection accuracy, by ultraviolet light pulse quantity that this circuit measures come
The degree of abnormal discharge of power equipment is characterized, so that it is more accurate to the detection of abnormal discharge of power equipment, sensitive, and be not easy
By environmental disturbances, circuit is simple, high-efficient.
In the optional embodiment of the application, the circuit further include: single-chip microcontroller and display, the single-chip microcontroller point
It is not connect with the output end of the pulse counter and display, shows the pulse counter for controlling the display
The quantity of the ultraviolet light pulse of transmission.
In the optional embodiment of the application, first operation amplifier circuit includes: the first operational amplifier,
The positive input of one resistance and second resistance, first operational amplifier is connect with the UV sensor, described
The output end of first operational amplifier is connect with the input terminal of the first end of the first resistor and the integrating circuit respectively,
The second end of the first resistor is connect with the first end of the second resistance, and the second end and ground terminal of the second resistance connect
It connects, while the first end of the second resistance is also connect with the reverse input end of the operational amplifier.
In the optional embodiment of the application, the integrating circuit includes: 3rd resistor, first capacitor, the second operation
Amplifier and the 4th resistance, first operational amplifier output terminal are connect with described 3rd resistor one end, the third electricity
The resistance other end is connect with the second operational amplifier positive input, and the first capacitor is arranged in second operation amplifier
Between the positive input and output end of device, the reverse input end of described 4th resistance one end and the second operational amplifier connects
It connects, the 4th resistance other end is connect with ground terminal, the output end of the second operational amplifier and the comparator circuit
Connection.
In the optional embodiment of the application, the comparator circuit include independent input and out-put supply 4ns,
The binary channels LT1715 model comparator of 150MHZ.
In the optional embodiment of the application, the pulse counter circuit includes three model SN74LS192 meters
Number device.
In the optional embodiment of the application, the pulse technique device circuit is also used to, and is counted by three SN74LS192
The form of number device three-stage cascade carries out technology to the pulsed current signal.
In the optional embodiment of the application, three models SN74LS192 counter includes: the first counting
Three No. 11 pins of device, the second counter and third counter, three counters are connected, and No. 14 of three counters are drawn
Foot is connected, and No. 12 pins of first counter are connect with No. 5 pins of the second counter, and the 13 of first counter
Number pin is connect with No. 4 pins of the second counter, No. 12 pins of second counter and No. 5 pins of third counter
Connection, No. 13 pins of second counter are connect with No. 4 pins of third counter, and No. 5 of first counter are drawn
Foot is connect with the output end of the comparator circuit, No. 12 pins of the third counter and No. 13 pins and the single-chip microcontroller
Connection.
In the optional embodiment of the application, the UV sensor includes model R2868 blind type ultraviolet light
Sensor.
The circuit of above scheme design, the UV sensor service band of the model are not done completely by solar radiation
It disturbs, and has the advantages that high speed, high-precision and high sensitivity, caused by significantly more efficient detection abnormal discharge of power equipment
Ultraviolet pulse.
In the optional embodiment of the application, first operational amplifier includes the high-speed computation of model LT1226
Amplifier.
First operational amplifier conversion speed of the circuit of above scheme design, the model is high, and there is high speed, high broadband to increase
The advantages of benefit, low noise.
In the optional embodiment of the application, the single-chip microcontroller includes the single-chip microcontroller of model C8051.
The circuit of above scheme design, the single-chip microcontroller of the model have the advantages that high speed, high-precision and low-power consumption.
The beneficial effect of the application includes: the abnormal discharge of power equipment detection electricity that the application obtains by above-mentioned design
Road, the pulsed current signal intensity that the first operation amplifier circuit generates Ultraviolet sensor increases, so that pulsed current signal
More firm, integrating circuit is arranged between the first operation amplifier circuit and comparator circuit, so that pulsed current signal is flat
Negative catalysis reduces interference of the other factors to pulsed current signal, substantially increases detection accuracy, measured by this circuit ultraviolet
Light pulse quantity characterizes the degree of abnormal discharge of power equipment, so as to the detection of abnormal discharge of power equipment more accurate,
It is sensitive, and not vulnerable to environmental disturbances, circuit is simple, high-efficient.
Other feature and advantage of the application will be illustrated in subsequent specification, also, partly be become from specification
It is clear that being understood and implementing the embodiment of the present application.The purpose of the application and other advantages can be by written
Specifically noted structure is achieved and obtained in specification, claims and attached drawing.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the application
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.By the way that shown in attached drawing, above and other purpose, the feature and advantage of the application will be more clear.In whole
Identical appended drawing reference indicates identical part in attached drawing.Attached drawing, emphasis deliberately are not drawn by actual size equal proportion scaling
It is that the purport of the application is shown.
Fig. 1 is abnormal discharge of power equipment detection circuit first structure figure provided by the embodiments of the present application；
Fig. 2 is the second structure chart of abnormal discharge of power equipment detection circuit provided by the embodiments of the present application；
Fig. 3 is the first operation amplifier circuit schematic diagram provided by the embodiments of the present application；
Fig. 4 is integrating circuit schematic diagram provided by the embodiments of the present application；
Fig. 5 is pulse counter circuit diagram provided by the embodiments of the present application.
Icon: 10- UV sensor；The first operation amplifier circuit of 20-；The first operational amplifier of 201-；202-
One resistance；203- second resistance；30- integrating circuit；301- 3rd resistor；302- first capacitor；303- second operational amplifier；
The 4th resistance of 304-；40- comparator circuit；50- pulse counter circuit；The first counter of 501-；The second counter of 502-；
503- third counter；60- single-chip microcontroller；70- display.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application embodiment clearer, implement below in conjunction with the application
The technical solution in the application embodiment is clearly and completely described in attached drawing in mode, it is clear that described reality
The mode of applying is a part of embodiment of the application, rather than whole embodiments.Based on the embodiment in the application, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to the application
The range of protection.Therefore, the detailed description of the presently filed embodiment provided in the accompanying drawings is not intended to limit below and is wanted
The scope of the present application of protection is sought, but is merely representative of the selected embodiment of the application.Based on the embodiment in the application,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts belongs to this
Apply for the range of protection.
In the description of the present application, it is to be understood that term " center ", " length ", " width ", " thickness ", "upper",
The orientation or positional relationship of the instructions such as "lower", "front", "rear", "left", "right", "inner", "outside" is orientation based on the figure
Or positional relationship, it is merely for convenience of description the application and simplifies description, rather than the equipment or element of indication or suggestion meaning
It must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to the application.
In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply relatively important
Property or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can be expressed
Or implicitly include one or more of the features.In the description of the present application, the meaning of " plurality " is two or two
More than, unless otherwise specifically defined.
In this application unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be direct phase
Even, can also indirectly connected through an intermediary, the interaction that can be connection or two elements inside two elements is closed
System.For the ordinary skill in the art, above-mentioned term in this application specific can be understood as the case may be
Meaning.
In this application unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
As shown in Figure 1, the application provides a kind of abnormal discharge of power equipment detection circuit, comprising: UV sensor 10,
First operation amplifier circuit 20, integrating circuit 30, comparator circuit 40, pulse counter circuit 50, single-chip microcontroller 60 and aobvious
Show that device 70, UV sensor 10 are connect with the positive input of the first operation amplifier circuit 20, the first operational amplifier electricity
The output end on road 20 is connect with the input terminal of integrating circuit 30, the output end of integrating circuit 30 and the input terminal of comparator circuit 40
Connection, the output end of comparator circuit 40 are connect with the input terminal of pulse counter circuit 50, UV sensor 10, for connecing
The ultraviolet light that is discharged of abnormal discharge of power equipment is received, and converts ultraviolet light into pulsed current signal and is transferred to the first operation and put
Big device circuit 20；
First operation amplifier circuit 20, for receiving the pulsed current signal of the transmission of UV sensor 10, by pulse
Current signal carries out signal amplification, and amplified pulsed current signal is transferred to integrating circuit 30；
Integrating circuit 30 will amplify for receiving the amplified pulsed current signal of the first operational amplifier 20 transmission
Pulsed current signal afterwards is gently changed, and the pulsed current signal after gentleization is transferred to comparator circuit 40；
Comparator circuit 40 passes through the threshold value of setting for receiving the pulsed current signal after 30 gentleization of integrating circuit
Effective pulsed current signal is filtered out, and effective pulsed current signal is transferred to pulse counter circuit 50；
Pulse counter circuit 50, for receiving effective pulsed current signal, by effective pulsed current signal into
Row counts, and obtains the quantity of ultraviolet light pulse according to the data counted to get, characterizes electric power using the quantity of ultraviolet light pulse
The degree of unit exception electric discharge.
Here it is worth noting that, pulse counter circuit 50 after being counted, can to the quantity after technology into
Row stores and exports obtain the quantity of ultraviolet light pulse, and the number of counter counting can also be obtained by other forms
Amount, the form obtained should not limit technical scheme.
The circuit of above scheme design, the abnormal discharge of power equipment detection circuit that above-mentioned design obtains, the first operation are put
The pulsed current signal intensity that big device circuit generates Ultraviolet sensor increases, so that pulsed current signal is more firm, integral
Circuit is arranged between the first operation amplifier circuit and comparator circuit, so that pulsed current signal is gently changed, reduces other
Interference of the factor to pulsed current signal, substantially increases detection accuracy, by ultraviolet light pulse quantity that this circuit measures come
The degree of abnormal discharge of power equipment is characterized, so that it is more accurate to the detection of abnormal discharge of power equipment, sensitive, and be not easy
By environmental disturbances, circuit is simple, high-efficient.
In the optional embodiment of the present embodiment, circuit further include: single-chip microcontroller 60 and display 70, single-chip microcontroller 60 divide
It is not connect with the output end of pulse counter 50 and display 70, shows that pulse counter 50 transmits for controlling display 70
Ultraviolet light pulse quantity.
In the optional embodiment of the present embodiment, UV sensor 10 includes model R2868 blind type ultraviolet light
Sensor.
Specifically, the channels operation wave band of the sensor is somebody's turn to do using 185nm~260nm wave band in the UV-C of solar blind
Wave band is not by the interference of solar radiation.Its sensitivity reaches 5000cps, has the advantages that high speed, high-precision and high sensitivity, can have
Ultraviolet pulse caused by effect detection abnormal discharge of power equipment.
In the optional embodiment of the present embodiment, as shown in Fig. 2, the first operation amplifier circuit 20 includes: the first fortune
Calculate amplifier 201, first resistor 202 and second resistance 203, the positive input and ultraviolet light of the first operational amplifier 201
Sensor 10 connect, the output end of the first operational amplifier 201 respectively with the first end of first resistor 202 and integrating circuit 30
Input terminal connection, the second end of first resistor 202 connect with the first end of second resistance 203, the second end of second resistance 203
It is connect with ground terminal, while the first end of second resistance 203 is also connect with the reverse input end of the operational amplifier.
The circuit of above scheme design, the pulse current that the first operation amplifier circuit 20 generates Ultraviolet sensor 10 are believed
Number intensity increases, so that pulsed current signal is more firm.
Optionally, the first operational amplifier selects model LT1226 high speed operation amplifier, concrete principle are as follows: because
Short, the Vin=V- of void, because empty disconnected, it is known that reverse input end no current flows into, therefore the electric current for flowing through resistance R1 and R2 isAnd input voltage is the both ends resistance R2 partial pressure, i.e. Vin=I × R2, thus can solveIt is logical
The value for crossing change resistance R1 and R2 can change the ratio of operational amplifier.
First operational amplifier conversion speed of the circuit of above scheme design, the model is high, and there is high speed, high broadband to increase
The advantages of benefit, low noise.
In the optional embodiment of the present embodiment, as shown in figure 3, integrating circuit 30 includes: 3rd resistor 301, first
Capacitor 302, second operational amplifier 303 and the 4th resistance 304,303 output end of the first operational amplifier and 3rd resistor 301
One end connection, 301 other end of 3rd resistor are connect with 303 positive input of second operational amplifier, and the setting of first capacitor 302 exists
Between the positive input and output end of second operational amplifier 303,304 one end of the 4th resistance and second operational amplifier 303
Reverse input end connection, 304 other end of the 4th resistance connect with ground terminal, the output end of second operational amplifier 303 and than
It is connected compared with device circuit 40.
The circuit of above scheme design, since ultraviolet light pulse frequency is higher, waveform is precipitous, captures difficult, addition integral
Circuit 30 makes impulse circuit signal become to be easy to carry out sampling and data processing than more gentle, in addition, integrating circuit for
Machine noise signal has good inhibiting effect, while can be improved the signal-to-noise ratio of ultraviolet light pulse, is greatly improved impulse circuit
The measurement accuracy of signal.
In the optional embodiment of the present embodiment, comparator circuit 40 include independent input and out-put supply 4ns,
The binary channels LT1715 model comparator of 150MHZ.
Specifically, using independent input/out-put supply 4ns, 150MHz binary channels LT1715 model comparator, then pass through
TTL gate circuit 74LS08 dual input four and door carry out logical operation, can screen to treated pulsed current signal, than
Two limit values up and down are set compared with device, filter out the disturbing pulse in environment finally by with door, and result is believed with 01 number
The output of number form.
In the optional embodiment of the present embodiment, pulse counter circuit 50 includes three model SN74LS192 meters
Number device.
In the optional embodiment of the present embodiment, pulse technique device circuit 50 is also used to, and is counted by three SN74LS192
The form of number device three-stage cascade carries out technology to the pulsed current signal.
In the optional embodiment of the present embodiment, as shown in figure 4, three model SN74LS192 counters include:
Three No. 11 pins of one counter 501, the second counter 502 and third counter 503, three counters are connected, and three
No. 14 pins of a counter are connected, and No. 12 pins of the first counter 501 are connect with No. 5 pins of the second counter 502,
No. 13 pins of the first counter 501 are connect with No. 4 pins of the second counter 502, No. 12 pins of the second counter 502 with
No. 5 pins of third counter 503 connect, and No. 13 pins of the second counter 502 and No. 4 pins of third counter 503 connect
Connect, No. 5 pins of the first counter 501 are connect with the output end of comparator circuit 40, No. 12 pins of third counter 503 with
No. 13 pins are connect with single-chip microcontroller 60.
Specifically, when the 10th rising edge of a pulse arrives, the position TCU 1, counter carry to second counter, the
The counting, it can be achieved that most 999 pulses is gradually analogized in one counter O reset, the position TCU 0, and by data with binary system shape
Formula is transmitted to single-chip microcontroller and carries out data processing.
In the optional embodiment of the present embodiment, single-chip microcontroller 60 includes the single-chip microcontroller of model C8051.
Specifically, single-chip microcontroller 60 receives the data for the binary form that pulse counter circuit 50 transmits, it will be binary
Data conversion controls display 70 and shows obtained decimal data at metric data, the tables of data of display
Show ultraviolet light pulse quantity, the degree of abnormal discharge of power equipment is characterized by ultraviolet light pulse quantity, so that being set to electric power
The detection of standby paradoxical discharge is more accurate, sensitive.
The circuit of above scheme design, the single-chip microcontroller of the model have the advantages that high speed, high-precision and low-power consumption.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Those familiar with the art within the technical scope of the present application, can easily think of the change or the replacement, and should all contain
Lid is within the scope of protection of this application.Therefore, the protection scope of the application shall be subject to the protection scope of the claim.
Claims (10)
1. a kind of abnormal discharge of power equipment detection circuit characterized by comprising UV sensor, the first operation amplifier
Device circuit, integrating circuit, comparator circuit and pulse counter circuit, the UV sensor are put with first operation
The positive input connection of big device circuit, the output end of first operation amplifier circuit and the input terminal of the integrating circuit
Connection, the output end of the integrating circuit are connect with the input terminal of the comparator circuit, the output end of the comparator circuit
It is connect with the input terminal of the pulse counter circuit,
The UV sensor, the ultraviolet light discharged for receiving abnormal discharge of power equipment, and the ultraviolet light is turned
It changes pulsed current signal into and is transferred to first operation amplifier circuit；
First operation amplifier circuit will be described for receiving the pulsed current signal of the UV sensor transmission
Pulsed current signal carries out signal amplification, and amplified pulsed current signal is transferred to the integrating circuit；
The integrating circuit will be described for receiving the amplified pulsed current signal of the first operational amplifier transmission
Amplified pulsed current signal is gently changed, and the pulsed current signal after gentleization is transferred to the comparator circuit；
The comparator circuit passes through the threshold value of setting for receiving the pulsed current signal after the integrating circuit is gently changed
Effective pulsed current signal is filtered out, and the effective pulsed current signal is transferred to the pulse counter circuit；
The pulse counter circuit passes through the effective pulse current for receiving the effective pulsed current signal
Signal is counted, and the quantity of ultraviolet light pulse is obtained according to the data counted to get, using the quantity of ultraviolet light pulse come table
Levy the degree of abnormal discharge of power equipment.
2. circuit according to claim 1, which is characterized in that the circuit further include: single-chip microcontroller and display, the list
Piece machine is connect with the output end of the pulse counter and display respectively, shows the pulse for controlling the display
The quantity of the ultraviolet light pulse of counter transmission.
3. circuit according to claim 1, which is characterized in that first operation amplifier circuit includes: that the first operation is put
Big device, first resistor and second resistance, the positive input and the UV sensor of first operational amplifier connect
It connects, the input with the first end of the first resistor and the integrating circuit respectively of the output end of first operational amplifier
End connection, the second end of the first resistor connect with the first end of the second resistance, the second end of the second resistance and
Ground terminal connection, while the first end of the second resistance is also connect with the reverse input end of the operational amplifier.
4. circuit according to claim 1, which is characterized in that the integrating circuit includes: 3rd resistor, first capacitor,
Two operational amplifiers and the 4th resistance, first operational amplifier output terminal is connect with described 3rd resistor one end, described
The 3rd resistor other end is connect with the second operational amplifier positive input, and the first capacitor setting is in second fortune
Between the positive input and output end for calculating amplifier, described 4th resistance one end is reversed defeated with the second operational amplifier
Enter end connection, the 4th resistance other end is connect with ground terminal, and the output end of the second operational amplifier is compared with described
Device circuit connection.
5. circuit according to claim 1, which is characterized in that the comparator circuit includes independent input and out-put supply
The binary channels LT1715 model comparator of 4ns, 150MHZ.
6. circuit according to claim 1, which is characterized in that the pulse counter circuit includes three models
SN74LS192 counter.
7. circuit according to claim 6, which is characterized in that three models SN74LS192 counter includes: first
Three No. 11 pins of counter, the second counter and third counter, three counters are connected, and the 14 of three counters
Number pin is connected, and No. 12 pins of first counter are connect with No. 5 pins of the second counter, first counter
No. 13 pins connect with No. 4 pins of the second counter, No. 5 of No. 12 pins of second counter and third counter
Pin connection, No. 13 pins of second counter are connect with No. 4 pins of third counter, and the 5 of first counter
Number pin is connect with the output end of the comparator circuit, No. 12 pins of the third counter and No. 13 pins and the list
The connection of piece machine.
8. circuit according to claim 1, which is characterized in that the UV sensor includes model R2868 blind type
UV sensor.
9. circuit according to claim 1, which is characterized in that first operational amplifier includes the height of model LT1226
Fast operational amplifier.
10. circuit according to claim 1, which is characterized in that the single-chip microcontroller includes the single-chip microcontroller of model C8051.
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| CN201811243353.9A CN109085482A (en) | 2018-10-24 | 2018-10-24 | A kind of abnormal discharge of power equipment detection circuit |
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| CN201811243353.9A CN109085482A (en) | 2018-10-24 | 2018-10-24 | A kind of abnormal discharge of power equipment detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110940902A (en) * | 2019-12-06 | 2020-03-31 | 西安锐驰电器有限公司 | Method for detecting abnormal discharge condition of power equipment |
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