CN206601446U - Portable power-frequency electric field strength measuring instrument - Google Patents
Portable power-frequency electric field strength measuring instrument Download PDFInfo
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- CN206601446U CN206601446U CN201720321644.XU CN201720321644U CN206601446U CN 206601446 U CN206601446 U CN 206601446U CN 201720321644 U CN201720321644 U CN 201720321644U CN 206601446 U CN206601446 U CN 206601446U
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- electric capacity
- resistance
- operational amplifier
- field strength
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- 230000005684 electric field Effects 0.000 title claims abstract description 18
- 230000003321 amplification Effects 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model discloses a kind of portable power-frequency electric field strength measuring instrument, including housing, mounting post is provided with housing, field strength sensor component is installed in mounting post, field strength sensor component rear end is provided with circuit board, filter amplification circuit is installed on circuit boards, A/D converter circuit, controller, alarm module and power supply, the front end face of housing is provided with display mounting hole, display screen is by showing that mounting hole is arranged on housing, the field strength sensor component includes metal polar plate I, metal polar plate II and dielectric, metal polar plate I and metal polar plate II are connected by wire with filter amplification circuit respectively, filter amplification circuit is connected by the input of A/D converter circuit and controller, the output end of controller is connected with alarm and display screen, power supply is filter circuit, amplifying circuit, A/D converter circuit, controller, alarm module and display screen are powered.The utility model small volume, it is easy to carry, and detect sensitive.
Description
Technical field
The utility model belongs to electric and electronic technical field, and in particular to one kind can be used for measuring change in power system
The portable power-frequency electric field strength measuring instrument of electric-field intensity near power station and ultra-high-tension power transmission line.
Background technology
Electric field strength measurement is applicable not only to power industry, the fields such as Aero-Space, bioengineering, mechanics of communication also by
Extensive use.With continuing to develop for China's power industry, the voltage class of transmission line of electricity and transformer station is constantly raised, and is caused
Domestic and international further investigation of the experts and scholars to fields such as electromagnetic interference and ecology influences.The current technology for electric field measurement is
Extend in the high-tension apparatuses such as insulator, high-tension cable, Operation switch, accurate measurement electric field strength is transmission line of electricity running status
Monitoring, Electric Power Equipment Insulation state evaluation, hyperbaric environment livewire work warning device provide significant data and supported, for power train
Safe and stable operation of uniting is significant.
It is relatively low to there is sensitivity in existing field strength meter, cost it is higher and not Portable belt the shortcomings of, it is and defeated in power frequency high voltage
It is difficult to ensure that measurement accuracy in electrical environment.
Utility model content
To be solved in the utility model is existing field strength meter relatively low deficiency of precision in power frequency high voltage transmits electricity environment,
And suitably reduce development cost, the portable degree of device improved, so as to provide a kind of portable power-frequency electric field strength measuring instrument, Neng Goushi
When measurement current environment in electric-field intensity, and field strength exceed setting alarm threshold value when, send alarm signal to staff.
In order to solve the above technical problems, the technical scheme that the utility model is used is as follows：
It is provided with mounting post, mounting post and installs in a kind of portable power-frequency electric field strength measuring instrument, including housing, housing
Have field strength sensor component, field strength sensor component rear end is provided with circuit board, be provided with circuit boards filter amplification circuit,
A/D converter circuit, controller, alarm module and power supply, display mounting hole is provided with the front end face of housing, and display screen leads to
Display mounting hole is crossed on housing, the field strength sensor component includes metal polar plate I, metal polar plate II and insulation and is situated between
Matter, metal polar plate I and metal polar plate II are be arranged in parallel and metal polar plate I and metal polar plate II are supported by dielectric, metal
Pole plate I and metal polar plate II are connected by wire with filter amplification circuit respectively, filter amplification circuit by A/D converter circuit with
The input connection of controller, the output end of controller is connected with alarm and display screen, and power supply is filter circuit, amplification
Circuit, A/D converter circuit, controller, alarm module and display screen are powered.
The alarm module includes flash lamp and buzzer.
The power supply is dry cell.
The filter amplification circuit includes one-level filter amplification circuit and secondary filter amplifying circuit, one-level filter and amplification electricity
Road is connected in series by resistance R11 with secondary filter amplifying circuit；The one-level filter amplification circuit includes relay J2, first
Resistance R9, the first electric capacity C55, the second electric capacity C56, the 3rd electric capacity C12, the 4th electric capacity C20, the 5th electric capacity C14, the 6th electric capacity
C16, second resistance R7,3rd resistor R8, the 4th resistance R9, the 5th resistance R13 and the first operational amplifier U3, relay J2's
One end is connected with the first electric capacity C55 one end and first resistor R9 one end respectively, first resistor R9 other end ground connection；First
The electric capacity C55 other end is connected with second resistance R7 one end, the second resistance R7 other end respectively with the 3rd electric capacity C12,
After three resistance R8 and the first operational amplifier U3 negative input connection, the 3rd electric capacity C12 and 3rd resistor R8 are connected in parallel
It is connected to the first operational amplifier U3 output end；First operational amplifier U3 cathode voltage input connects with external power supply AV
Connect, the 5th electric capacity C14 and the 6th electric capacity C16 are connected in parallel the cathode voltage input that rear one end is connected to the first operational amplifier U3
Hold between power supply AV, the other end is grounded；First operational amplifier U3 cathode voltage input end grounding；Relay J2's is another
End is connected through the second electric capacity C56 with the first operational amplifier U3 negative input, and the 5th resistance R13 one end is connected to second
Between electric capacity C56 and the first operational amplifier U3 negative input, the 5th resistance R13 other end and the 4th electric capacity C20 go here and there
It is grounded, and is connected between the 5th resistance R13 and the 4th electric capacity C20 with power supply VREF after connection connection；The secondary filter amplification electricity
Road include the 6th resistance R12, the 7th resistance R5, the 8th resistance R6, the 9th resistance R10, the 7th electric capacity C17, the 8th electric capacity C19,
9th electric capacity C13, the tenth electric capacity C15, the 11st electric capacity C18 and the second operational amplifier U2, the 6th resistance R12 one end pass through
First operational amplifier U3 output end in resistance R11 and the first filter amplification circuit；The 6th resistance R12 other end and second
Operational amplifier U2 electrode input end connection, the second operational amplifier U2 cathode voltage input end grounding；8th electric capacity C19
One end be connected between the 6th resistance R12 and the second operational amplifier U2 electrode input end, the 8th electric capacity C19 other end
Ground connection；7th electric capacity C17 one end is connected between resistance R11 and the 6th resistance R12, the 7th electric capacity C17 other end and
Two operational amplifier U2 output end connection；7th resistance R5 one end ground connection, the other end respectively with the second operational amplifier U2
Negative input and the 8th resistance R6 one end connection, the 8th resistance R6 other end and the second operational amplifier U2 output
End connection, the second operational amplifier U2 cathode voltage input is connected with external power supply AV, the 9th electric capacity C13, the tenth electric capacity
C15 be connected in parallel rear one end be connected between the second operational amplifier U2 cathode voltage input and power supply AV, another termination
Ground；9th resistance R10 one end is connected with the second operational amplifier U2 output end, and the 9th resistance the R10 other end and AD turn
Circuit connection is changed, and the 11st electric capacity C18 one end is connected between the 9th resistance R10 and A/D converter circuit, other end ground connection.
Field strength dress by field strength sensor component detection local environment electric field strength size and is changed to electricity by the utility model
Voltage signal is simultaneously filtered amplification by pressure signal by filter amplification circuit, filters out metal polar plate I and the two ends of metal polar plate II
High fdrequency component in the ac induction voltage sent and because the charge inducing of metal polar plate I 4 and metal polar plate II 5 has
Limit, the induced voltage of generation is fainter, and amplifying circuit can be with gain voltage signal, the effectively sensitivity of increase measuring instrument,
Voltage signal after filter and amplification, which is changed and is uploaded in controller by A/D converter circuit, to be handled, when detected value is super
When going out setting value, controller control alarm sends alarm and reminding staff electromagnetic environment beyond national safety standard scope,
And carry out the field strength that display is detected in display screen.The utility model small volume, it is easy to carry, and detect sensitive.
Brief description of the drawings
Fig. 1 is rearview of the present utility model.
Fig. 2 is right view of the present utility model.
Fig. 3 is control principle block diagram of the present utility model.
Fig. 4 is the circuit theory diagrams of the utility model filter amplification circuit.
Fig. 5 is the utility model power supply power supply the principle figure.
Embodiment
As Figure 1-4, installation is provided with a kind of portable power-frequency electric field strength measuring instrument, including housing 1, housing 1
Field strength sensor component is installed, field strength sensor component rear end is provided with circuit board 2, pacified on the circuit board 2 in post, mounting post
Equipped with filter amplification circuit, A/D converter circuit, controller, alarm module and power supply, the alarm module includes flash lamp
And buzzer.The power supply is dry cell.
The front end face of housing 1 is provided with display mounting hole, display screen 3 is by showing that mounting hole is arranged on housing 1, institute
Stating field strength sensor component includes metal polar plate I 4, metal polar plate II 5 and dielectric 6, metal polar plate I 4 and metal polar plate II 5
It is arranged in parallel and metal polar plate I 4 and metal polar plate II 5 is supported by dielectric 6, II 5 points of metal polar plate I 4 and metal polar plate
It is not connected by wire with filter amplification circuit, filter amplification circuit is connected by the input of A/D converter circuit and controller,
The output end of controller is connected with alarm and display screen 3, and power supply is filter circuit, amplifying circuit, A/D converter circuit, control
Device processed, alarm module and display screen are powered, and power supply circuit is as shown in Figure 5.
Specifically, the filter amplification circuit includes one-level filter amplification circuit and secondary filter amplifying circuit, first-level filtering
Ripple amplifying circuit is connected in series by resistance R11 with secondary filter amplifying circuit；The one-level filter amplification circuit includes relay
Device J2, first resistor R9, the first electric capacity C55, the second electric capacity C56, the 3rd electric capacity C12, the 4th electric capacity C20, the 5th electric capacity C14,
6th electric capacity C16, second resistance R7,3rd resistor R8, the 4th resistance R9, the 5th resistance R13 and the first operational amplifier U3, after
Electrical equipment J2 one end is connected with the first electric capacity C55 one end and first resistor R9 one end respectively, the first resistor R9 other end
Ground connection；The first electric capacity C55 other end is connected with second resistance R7 one end, and the second resistance R7 other end is electric with the 3rd respectively
Hold C12,3rd resistor R8 and the first operational amplifier U3 negative input connection, the 3rd electric capacity C12 and 3rd resistor R8 are simultaneously
The first operational amplifier U3 output end is connected to after connection connection；First operational amplifier U3 cathode voltage input with it is external
Power supply AV connections, the 5th electric capacity C14 and the 6th electric capacity C16 are connected in parallel the positive pole that rear one end is connected to the first operational amplifier U3
Between voltage input end and power supply AV, the other end ground connection；First operational amplifier U3 cathode voltage input end grounding；Relay
The J2 other end is connected through the second electric capacity C56 with the first operational amplifier U3 negative input, and the 5th resistance R13 one end connects
Between the negative input for being connected on the second electric capacity C56 and the first operational amplifier U3, the 5th resistance R13 other end and the 4th electricity
Hold after C20 is connected in series and be grounded, and be connected between the 5th resistance R13 and the 4th electric capacity C20 with power supply VREF；The secondary filter
Amplifying circuit includes the 6th resistance R12, the 7th resistance R5, the 8th resistance R6, the 9th resistance R10, the 7th electric capacity C17, the 8th electricity
Hold C19, the 9th electric capacity C13, the tenth electric capacity C15, the 11st electric capacity C18 and the second operational amplifier U2, the one of the 6th resistance R12
The output end that end passes through the first operational amplifier U3 in resistance R11 and the first filter amplification circuit；The 6th resistance R12 other end
It is connected with the second operational amplifier U2 electrode input end, the second operational amplifier U2 cathode voltage input end grounding；8th
Electric capacity C19 one end is connected between the 6th resistance R12 and the second operational amplifier U2 electrode input end, the 8th electric capacity C19
The other end ground connection；7th electric capacity C17 one end is connected between resistance R11 and the 6th resistance R12, and the 7th electric capacity C17's is another
One end is connected with the second operational amplifier U2 output end；7th resistance R5 one end ground connection, the other end respectively with the second computing
Amplifier U2 negative input and the 8th resistance R6 one end connection, the 8th resistance the R6 other end and the second operational amplifier
U2 output end connection, the second operational amplifier U2 cathode voltage input is connected with external power supply AV, the 9th electric capacity C13,
Tenth electric capacity C15 be connected in parallel rear one end be connected between the second operational amplifier U2 cathode voltage input and power supply AV,
The other end is grounded；9th resistance R10 one end is connected with the second operational amplifier U2 output end, and the 9th resistance R10's is another
End is connected with A/D converter circuit, and the 11st electric capacity C18 one end is connected between the 9th resistance R10 and A/D converter circuit, separately
One end is grounded.
Field strength dress is simultaneously changed to voltage signal and by voltage by field strength sensor component detection local environment electric field strength size
Signal is filtered amplification by filter amplification circuit, filters out metal polar plate I and exchanging that the two ends of metal polar plate II are sent
High fdrequency component in induced voltage and because the charge inducing of metal polar plate I 4 and metal polar plate II 5 is limited, the induced electricity of generation
Pressure ratio is fainter, and amplifying circuit can be with gain voltage signal, the effectively sensitivity of increase measuring instrument, the voltage after filter and amplification
Signal is changed and is uploaded in controller by A/D converter circuit and handled, when detected value exceeds setting value, control
Device control alarm sends alarm and reminding staff electromagnetic environment beyond national safety standard scope, and is shown in display screen
Show the field strength detected.
Claims (4)
1. a kind of portable power-frequency electric field strength measuring instrument, it is characterised in that：Including housing（1）, housing（1）Inside it is provided with installation
Field strength sensor component is installed, field strength sensor component rear end is provided with circuit board in post, mounting post（2）, in circuit board（2）
On filter amplification circuit, A/D converter circuit, controller, alarm module and power supply are installed, in housing（1）Front end face set
It is equipped with display mounting hole, display screen（3）By showing that mounting hole is arranged on housing（1）On, the field strength sensor component includes
Metal polar plate I（4）, metal polar plate II（5）And dielectric（6）, metal polar plate I（4）With metal polar plate II（5）Be arranged in parallel and
Metal polar plate I（4）With metal polar plate II（5）Pass through dielectric（6）Support, metal polar plate I（4）With metal polar plate II（5）Point
It is not connected by wire with filter amplification circuit, filter amplification circuit is connected by the input of A/D converter circuit and controller,
The output end of controller and alarm and display screen（3）Connection, power supply is filter amplification circuit, A/D converter circuit, control
Device, alarm module and display screen are powered.
2. portable power-frequency electric field strength measuring instrument according to claim 1, it is characterised in that：The alarm module includes
Flash lamp and buzzer.
3. portable power-frequency electric field strength measuring instrument according to claim 1, it is characterised in that：The power supply is dry
Battery.
4. portable power-frequency electric field strength measuring instrument according to claim 1, it is characterised in that：The filter amplification circuit
Including one-level filter amplification circuit and secondary filter amplifying circuit, one-level filter amplification circuit passes through resistance R11 and secondary filter
Amplifying circuit is connected in series；The one-level filter amplification circuit includes relay J2, first resistor R9, the first electric capacity C55, second
Electric capacity C56, the 3rd electric capacity C12, the 4th electric capacity C20, the 5th electric capacity C14, the 6th electric capacity C16, second resistance R7,3rd resistor
R8, the 4th resistance R9, the 5th resistance R13 and the first operational amplifier U3, relay J2 one end is respectively with the first electric capacity C55's
One end and the connection of first resistor R9 one end, first resistor R9 other end ground connection；The first electric capacity C55 other end and the second electricity
Hinder R7 one end connection, the second resistance R7 other end respectively with the 3rd electric capacity C12,3rd resistor R8 and the first operational amplifier
U3 negative input connection, the 3rd electric capacity C12 and 3rd resistor R8 are connected to the first operational amplifier U3's after being connected in parallel
Output end；First operational amplifier U3 cathode voltage input is connected with external power supply AV, the 5th electric capacity C14 and the 6th electric capacity
C16 be connected in parallel rear one end be connected between the first operational amplifier U3 cathode voltage input and power supply AV, another termination
Ground；First operational amplifier U3 cathode voltage input end grounding；The relay J2 other end is transported through the second electric capacity C56 and first
Amplifier U3 negative input connection is calculated, the 5th resistance R13 one end is connected to the second electric capacity C56 and the first operational amplifier
Between U3 negative input, the 5th resistance the R13 other end and the 4th electric capacity C20 are grounded after being connected in series, and the 5th resistance
It is connected between R13 and the 4th electric capacity C20 with power supply VREF；The secondary filter amplifying circuit includes the 6th resistance R12, the 7th electricity
Hinder R5, the 8th resistance R6, the 9th resistance R10, the 7th electric capacity C17, the 8th electric capacity C19, the 9th electric capacity C13, the tenth electric capacity C15,
11st electric capacity C18 and the second operational amplifier U2, the 6th resistance R12 one end pass through resistance R11 and the first filter and amplification electricity
First operational amplifier U3 output end in road；The 6th resistance R12 other end and the second operational amplifier U2 positive pole input
End connection, the second operational amplifier U2 cathode voltage input end grounding；8th electric capacity C19 one end is connected to the 6th resistance
Between R12 and the second operational amplifier U2 electrode input end, the 8th electric capacity C19 other end ground connection；The one of 7th electric capacity C17
End is connected between resistance R11 and the 6th resistance R12, the 7th electric capacity C17 other end and the second operational amplifier U2 output
End connection；7th resistance R5 one end ground connection, the other end are electric with the second operational amplifier U2 negative input and the 8th respectively
R6 one end connection is hindered, the 8th resistance R6 other end is connected with the second operational amplifier U2 output end, the second operation amplifier
Device U2 cathode voltage input is connected with external power supply AV, and the 9th electric capacity C13, the tenth electric capacity C15 are connected in parallel rear one end and connected
It is connected between the second operational amplifier U2 cathode voltage input and power supply AV, the other end is grounded；9th resistance R10 one end
It is connected with the second operational amplifier U2 output end, the 9th resistance R10 other end is connected with A/D converter circuit, and the 11st electricity
Appearance C18 one end is connected between the 9th resistance R10 and A/D converter circuit, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720321644.XU CN206601446U (en) | 2017-03-30 | 2017-03-30 | Portable power-frequency electric field strength measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720321644.XU CN206601446U (en) | 2017-03-30 | 2017-03-30 | Portable power-frequency electric field strength measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206601446U true CN206601446U (en) | 2017-10-31 |
Family
ID=60146116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720321644.XU Expired - Fee Related CN206601446U (en) | 2017-03-30 | 2017-03-30 | Portable power-frequency electric field strength measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206601446U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490273A (en) * | 2018-03-28 | 2018-09-04 | 中国科学院电子学研究所 | Electric-field sensor system based on multi-channel switch |
| CN110492266A (en) * | 2019-08-07 | 2019-11-22 | 广东电网有限责任公司 | A kind of non-contact electricity testing Integral earthing wire clamp |
| CN111766456A (en) * | 2020-06-30 | 2020-10-13 | 国网安徽省电力有限公司亳州供电公司 | Bracelet-type three-dimensional electric field high-voltage electroscope |
-
2017
- 2017-03-30 CN CN201720321644.XU patent/CN206601446U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108490273A (en) * | 2018-03-28 | 2018-09-04 | 中国科学院电子学研究所 | Electric-field sensor system based on multi-channel switch |
| CN110492266A (en) * | 2019-08-07 | 2019-11-22 | 广东电网有限责任公司 | A kind of non-contact electricity testing Integral earthing wire clamp |
| CN110492266B (en) * | 2019-08-07 | 2024-01-09 | 广东电网有限责任公司 | Non-contact electricity-checking integrated grounding wire clamp |
| CN111766456A (en) * | 2020-06-30 | 2020-10-13 | 国网安徽省电力有限公司亳州供电公司 | Bracelet-type three-dimensional electric field high-voltage electroscope |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171031 Termination date: 20200330 |
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| CF01 | Termination of patent right due to non-payment of annual fee |