CN109884385A - Contactless voltage detecting sensor - Google Patents
Contactless voltage detecting sensor Download PDFInfo
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- CN109884385A CN109884385A CN201910279530.7A CN201910279530A CN109884385A CN 109884385 A CN109884385 A CN 109884385A CN 201910279530 A CN201910279530 A CN 201910279530A CN 109884385 A CN109884385 A CN 109884385A
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- technotron
- detecting sensor
- voltage detecting
- power supply
- processing unit
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- 238000012545 processing Methods 0.000 claims abstract description 31
- 230000005684 electric field Effects 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 12
- 239000000523 sample Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The present invention relates to circuit arrangement voltage detecting technical fields, disclose a kind of contactless voltage detecting sensor, including technotron, power supply unit and signal processing unit, the grid induction space electric field of the technotron, the power supply unit is connected to the source electrode of technotron, the drain electrode of the technotron is connected to signal processing unit, the source voltage that the power supply unit is supplied to technotron is less than 3.5V, the drain electrode output current or voltage and the electric field of grid induction of the technotron are linearly corresponding, the signal processing unit receives drain current signal and carries out processing output.The present invention does not have to contact power grid and equipment, can output voltage waveforms data.
Description
Technical field
The present invention relates to circuit arrangement voltage detecting technical field more particularly to a kind of contactless voltage detecting sensings
Device.
Background technique
Current electric system, including alternating current, high voltage power cable, subway electricity consumption, motor etc., user is difficult in real time
Solve the working condition of cable and each electric appliances.And existing instrument with contacts equipment is difficult to access high-voltage fence, from
And increase monitoring difficulty.
Whether existing contactless multimeter can not have High Level AC Voltage in contact arrangement detecting devices or cable, but
It can only detect whether alternating current, can not detect the waveform and harmonic wave of voltage.
Summary of the invention
The purpose of the present invention is to solve the above problems, a kind of contactless voltage detecting sensor are provided, without connecing
Electric shock net and equipment, can output voltage waveforms data.
Referring to attached drawing 1, technotron after grid input or induced voltage, when the voltage that drain electrode applies is less than
When 3.5V or so, N-channel by pinch off, does not form linear variable resistance area.It can be changed at this point, technotron is equivalent to one
Resistance exports corresponding electric current, gate voltage signal is changed into current signal according to the voltage that grid inputs.
Referring to attached drawing 2, using above-mentioned principle, when being located in variable electric field on grid, apply 2.0V or so voltage in drain electrode
When, electric current is generated between drain electrode and source electrode, by resistance, generates variable voltage, the electricity of this output voltage and grid induction
Corrugating is consistent, after signal processing unit is to waveform processing, forms the output signal of sensor, is supplied to follow-up system use.
The technical solution adopted by the present invention is that:
A kind of contactless voltage detecting sensor, characterized in that including technotron, power supply unit and signal processing list
Member, the grid induction space electric field of the technotron, the power supply unit are connected to the source electrode of technotron, institute
The drain electrode for stating technotron is connected to signal processing unit, and the power supply unit is supplied to the source electrode electricity of technotron
Pressure is less than 3.5V, and the drain electrode output current or voltage and the electric field of grid induction of the technotron are linearly corresponding, institute
It states signal processing unit reception drain current or voltage signal carries out processing output.
Further, signal processing unit includes AD conversion module, communication module, the AD conversion module by drain current or
Voltage signal is converted into digital signal, exports the digital signal by communication module.
Further, the AD conversion module is ARM or 51 single-chip microcontrollers, and the communication unit is that RS485 bus or CAN are total
Line.
Further, the technotron is 2N7002 or 3DJ6 type, what the source electrode of the technotron applied
Voltage is less than 2.0V.
Further, the contactless voltage detecting sensor includes shielding shell, the technotron, power supply list
Member and signal processing unit are arranged in the shielding shell, the shielding earthing of casing.
Further, the end of the grid linking probe of the technotron, the probe is stretched out or close to outside shielding
The opening of the end of shell.
Further, the technotron and signal processing unit be altogether.
Further, the power supply unit passes through twisted pair line connection external direct current power supply.
Further, the ID of storage sensor is identified in the AD conversion module.
Further, the shielding shell is circular metal tubulose structure, and the probe tips are located at the front end of shielding shell
Opening, it is described shielding outer casing back setting signal processing unit and power supply unit connector.
The beneficial effects of the present invention are:
(1) power cable and equipment need not be contacted or be accessed, the voltage waveform of equipment cable, the physical quantitys such as harmonic wave are detected；
(2) overall package is small in size in tubular metal shell, easy for installation；
(3) principle is simple, at low cost, and effect is good.
Detailed description of the invention
Attached drawing 1 is the drain electrode output characteristic curve figure of technotron；
Attached drawing 2 is the principle of the present invention figure；
Attached drawing 3 is modular construction schematic diagram of the invention.
Specific embodiment
It elaborates with reference to the accompanying drawing to the specific embodiment of the contactless voltage detecting sensor of the present invention.
Referring to attached drawing 3, contactless voltage detecting sensor includes technotron 3, power supply unit 6 and signal processing
Unit 8, the grid induction space electric field of technotron 3, power supply unit 6 are connected to the source electrode of technotron 3, junction type
The drain electrode of field-effect tube 3 is connected to signal processing unit 8, and the source voltage that power supply unit 6 is supplied to technotron 3 is less than
3.5V, the drain electrode output current or voltage and the electric field of grid induction of technotron 3 are linearly corresponding, signal processing unit
8 reception drain current signals carry out processing output.
Technotron 3 is 2N7002 or 3DJ6 type pipe, and the voltage that the source electrode of technotron 3 applies is less than
2.0V.Power supply unit 6 realizes power distribution and power control, power supply chip model NCV5501DT33 by power management chip.
By the external 12V DC electricity of twisted pair, burning voltage is provided for technotron 3 and 8 module of signal processing unit.
Signal processing unit 8 includes AD conversion module 4, communication module 5, and AD conversion module 4 believes drain current or voltage
Number it is converted into digital signal, by 5 output digit signals of communication module.AD conversion module 4 is ARM or 51 single-chip microcontrollers, such as ARM chip
STM32F030F4P6.Communication unit is RS485 bus or CAN bus, if the chip of RS485 bus is ADM2587E.Power supply list
Member 6 and communication module 5 pass through interface 7 and are connected to external processing unit and power supply.Power supply unit 6 and the connection of external power supply pass through
Twisted pair reduces the interference to circuit.
Sensor is externally provided with shielding shell 1.Shielding shell 1 is circular metal tubulose structure, technotron 3, power supply
Unit 6 and signal processing unit 8 are arranged in shielding shell 1, and shielding shell 1 is grounded.The grid of technotron 3 connects
The end of probe 2, probe 2 is stretched out or the opening of the end of close shielding shell 1.Technotron 3 and signal processing list
Member 8 is altogether.
The working principle of the invention process is as follows:
The interface 7 of communication module 5 is connected into display equipment or analytical equipment, for example computer or oscillograph, power supply unit 6 are connected to
12V DC electricity, shielding shell 1 and signal processing unit 8 are grounded.The single-chip microcontroller of AD conversion module 4 fixes one to sensor
ID mark.
Sensor there are into cable or equipment of the one end of probe 2 close to voltage to be measured, since cable periphery is there are electric potential field,
Probe 2 senses the grid that electric potential signal is sent to after potential technotron 3, in drain electrode output and electric potential field waveform phase
Corresponding current or voltage.It is defeated by communication module 5 after current or voltage signal is converted to digital signal by AD conversion module 4
Equipment is extremely shown out, while output signal is corresponding with the fixed ID mark of the single-chip microcontroller of AD conversion module 4, convenient for recording, depositing
Storage.
By taking electric machines test as an example, sensor is installed on the position near motor close to coil, records motor work in real time
When coil voltage waveform, waveform is kept to database, and is analyzed, by sensor detection waveform and normal waveform pair
Than when waveform occurs abnormal and alarm.And electric machine operation state, prediction can be analyzed according to the history Wave data of storage
Electrical fault is possible, and replacement in time or maintenance guarantee being normally carried out for production work.
For the accuracy for ensuring detection data, same equipment can be detected by multiple sensors simultaneously, by every
The tag slot the ID component voltage Wave data of a sensor records, and keeps detection more accurate.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (10)
1. a kind of contactless voltage detecting sensor, it is characterised in that: at technotron, power supply unit and signal
Unit, the grid induction space electric field of the technotron are managed, the power supply unit is connected to the source of technotron
Pole, the drain electrode of the technotron are connected to signal processing unit, and the power supply unit is supplied to technotron
Source voltage is less than 3.5V, and the drain electrode output current or voltage of the technotron and the electric field of grid induction are linearly right
It answers, the signal processing unit receives drain current or voltage signal carries out processing output.
2. contactless voltage detecting sensor according to claim 1, it is characterised in that: signal processing unit includes AD
Conversion module, communication module, drain current or voltage signal are converted into digital signal by the AD conversion module, by communication module
Export the digital signal.
3. contactless voltage detecting sensor according to claim 2, it is characterised in that: the AD conversion module is
ARM or 51 single-chip microcontrollers, the communication unit are RS485 bus or CAN bus.
4. contactless voltage detecting sensor according to claim 1, it is characterised in that: the technotron is
2N7002 or 3DJ6 type, the voltage that the source electrode of the technotron applies are less than 2.0V.
5. contactless voltage detecting sensor according to any one of claim 1 to 4, it is characterised in that: described non-
Contact voltage detecting sensor includes shielding shell, and the technotron, power supply unit and signal processing unit are all provided with
It sets in the shielding shell, the shielding earthing of casing.
6. contactless voltage detecting sensor according to claim 5, it is characterised in that: the technotron
The end of grid linking probe, the probe is stretched out or the opening of the end of close shielding shell.
7. contactless voltage detecting sensor according to claim 5, it is characterised in that: the technotron with
Signal processing unit is altogether.
8. contactless voltage detecting sensor according to claim 5, it is characterised in that: the power supply unit passes through double
Twisted wire connects external direct current power supply.
9. contactless voltage detecting sensor according to claim 3, it is characterised in that: the AD conversion module memory
Store up the ID mark of sensor.
10. contactless voltage detecting sensor according to claim 5, it is characterised in that: the shielding shell is circle
Shape metallic tube-shaped structure, the probe tips are located at the opening of the front end of shielding shell, the shielding outer casing back setting letter
The connector of number processing unit and power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910279530.7A CN109884385A (en) | 2019-04-09 | 2019-04-09 | Contactless voltage detecting sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910279530.7A CN109884385A (en) | 2019-04-09 | 2019-04-09 | Contactless voltage detecting sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109884385A true CN109884385A (en) | 2019-06-14 |
Family
ID=66936528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910279530.7A Pending CN109884385A (en) | 2019-04-09 | 2019-04-09 | Contactless voltage detecting sensor |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141965A (en) * | 2019-12-26 | 2020-05-12 | 兰州空间技术物理研究所 | Electrostatic field measuring circuit using field effect transistor |
| CN114789458A (en) * | 2022-04-15 | 2022-07-26 | 国网宁夏电力有限公司营销服务中心(国网宁夏电力有限公司计量中心) | Robot and method for unmanned inspection by combining intelligent sensing |
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| CN102721918A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | High-voltage detection circuit |
| CN103888322A (en) * | 2014-04-15 | 2014-06-25 | 重庆贻科科技有限公司 | Monitoring method and monitoring system of motor |
| CN104950258A (en) * | 2015-07-02 | 2015-09-30 | 天津汇讯视通科技有限公司 | Motor detection method and circuit for CCTV (closed circuit television) camera |
| CN105337259A (en) * | 2015-11-24 | 2016-02-17 | 珠海格力电器股份有限公司 | Motor stalling protection method and device |
| CN206132894U (en) * | 2016-08-29 | 2017-04-26 | 慈溪上源三益智能科技有限公司 | Be applied to instantaneous water heater's electric leakage detection circuit |
| CN108663562A (en) * | 2018-08-07 | 2018-10-16 | 北京中科飞龙传感技术有限责任公司 | A kind of contactless cable voltage measurement sensor |
| CN108957317A (en) * | 2018-06-06 | 2018-12-07 | 广东核电合营有限公司 | Detection method, device, computer and the storage medium of pressurized-water reactor nuclear power plant generating set bearing shell |
| CN209894877U (en) * | 2019-04-09 | 2020-01-03 | 上海汇像信息技术有限公司 | Non-contact voltage detection sensor |
-
2019
- 2019-04-09 CN CN201910279530.7A patent/CN109884385A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102023577A (en) * | 2010-11-10 | 2011-04-20 | 东风汽车股份有限公司 | Controller of electric automobile |
| CN102721918A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | High-voltage detection circuit |
| CN103888322A (en) * | 2014-04-15 | 2014-06-25 | 重庆贻科科技有限公司 | Monitoring method and monitoring system of motor |
| CN104950258A (en) * | 2015-07-02 | 2015-09-30 | 天津汇讯视通科技有限公司 | Motor detection method and circuit for CCTV (closed circuit television) camera |
| CN105337259A (en) * | 2015-11-24 | 2016-02-17 | 珠海格力电器股份有限公司 | Motor stalling protection method and device |
| CN206132894U (en) * | 2016-08-29 | 2017-04-26 | 慈溪上源三益智能科技有限公司 | Be applied to instantaneous water heater's electric leakage detection circuit |
| CN108957317A (en) * | 2018-06-06 | 2018-12-07 | 广东核电合营有限公司 | Detection method, device, computer and the storage medium of pressurized-water reactor nuclear power plant generating set bearing shell |
| CN108663562A (en) * | 2018-08-07 | 2018-10-16 | 北京中科飞龙传感技术有限责任公司 | A kind of contactless cable voltage measurement sensor |
| CN209894877U (en) * | 2019-04-09 | 2020-01-03 | 上海汇像信息技术有限公司 | Non-contact voltage detection sensor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141965A (en) * | 2019-12-26 | 2020-05-12 | 兰州空间技术物理研究所 | Electrostatic field measuring circuit using field effect transistor |
| CN114789458A (en) * | 2022-04-15 | 2022-07-26 | 国网宁夏电力有限公司营销服务中心(国网宁夏电力有限公司计量中心) | Robot and method for unmanned inspection by combining intelligent sensing |
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