CN102508050B - Instrument for measuring static electricity on line - Google Patents
Instrument for measuring static electricity on line Download PDFInfo
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- CN102508050B CN102508050B CN201110370545.8A CN201110370545A CN102508050B CN 102508050 B CN102508050 B CN 102508050B CN 201110370545 A CN201110370545 A CN 201110370545A CN 102508050 B CN102508050 B CN 102508050B
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- 230000003068 static effect Effects 0.000 title claims abstract description 34
- 230000005611 electricity Effects 0.000 title abstract 8
- 239000002184 metal Substances 0.000 claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 21
- 230000006698 induction Effects 0.000 claims description 26
- 238000012545 processing Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000004069 differentiation Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 239000002360 explosive Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 abstract 3
- 230000005684 electric field Effects 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005421 electrostatic potential Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
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Abstract
The invention discloses an instrument for measuring static electricity on line, belongs to the field of static electricity monitoring, and particularly relates to the instrument for measuring static electricity on line. A static electricity sensor consists of a sensing metal surface, a shielding metal surface and an insulation sheet; the sensing metal surface is fixed on one surface of the insulation sheet; the shielding metal surface is fixed on the other surface of the insulation sheet; and a bimorph piezoelectric vibrator is fixed on the shielding metal surface of the static electricity sensor. The instrument for measuring the static electricity on line has the characteristics of low driving voltage, low vibrating frequency and large vibrating amplitude, can pass the safe explosion-proof authentication, and can measure the static electricity on line and make an alarm in places where oil products and flammable and explosive gases are stored and transported, so that a present blank in the field is filled up; and enough sensing voltage and sensing current can be obtained on the sensing metal surface, so that a final measurement value has a relative high linearity.
Description
Technical field
The invention belongs to electrostatic monitoring field, especially relate to a kind of static on-line measurement instrument.
Background technology
Thunderbolt, between object, rub, the modes such as alternating current induction all can produce static, the static that does not import the earth can change or static electric field, at present the metering system of static is divided into the static measurement mode and the kinetic measurement mode that has mechanical motion of machinery-free motion, no matter which kind of metering system, all adopt noncontact and keep the electrostatic induction face of safe enough distance to be used as the collection point of electrostatic induction electric charge, static static measurement mode is mainly used to measure changing electric field, if the net charge on static face is invariable, electric field is constant, electric current from sensitive surface to amplifier can be very little, even reach pA level electric current, final measurement is very unstable, because Air Flow, the leakage current of air humidity and temperature and circuit all can bring very large impact to measurement result, static static measurement mode is now mainly used to measure changing electric field, substantially cannot measure for static electric field.
Electrostatic dynamic metering system, traditional approach has motor to drive, solenoid-activated, piezoelectric ceramic piece drives, Tuning Fork Switch driving etc., motor drives and solenoid-activated all needs larger electric current, the energy storing in inductance is far longer than the intrinsic safety type requirement of explosion proof of oil storage and transportation place electrostatic detection product, in electrostatic transducer, be constantly filled with inert gas and can reach flame proof requirement, because kinetic measurement type electrostatic transducer cannot be made a product that shell is airtight, need the space of an opening to introduce the sensitive surface of electric field line to sensor, reach flame proof requirement so need to constantly be filled with inert gas, this significantly increases cost.
Piezoelectric ceramic piece drives needs high voltage, even reach 200V, even but high like this voltage, the amplitude that piezoelectric ceramic piece produces is still too little, cannot in the sensitive surface of electrostatic transducer, produce enough inductive voltage and currents, for the high pressure of 200V, even if very little current drain has also been difficult to intrinsic safety type certification of explosion protection.In prior art, need survey crew to hold electrostatic voltmeter, mobile this table is to static face from afar, moved moment electrostatic potential measurement by moment, and this table must lean on survey crew to assist it to move, and can not complete online test constantly.
Therefore those skilled in the art are devoted to develop a kind of intrinsic safe explosion-proof type static on-line measurement instrument of test constantly online.
Summary of the invention
Because the above-mentioned defect of prior art, technical matters to be solved by this invention is to provide a kind of intrinsic safe explosion-proof type static on-line measurement instrument of test constantly online.
For achieving the above object, the invention provides a kind of static on-line measurement instrument, comprise discharge circuit, the output terminal of described discharge circuit is connected with the input end of wave filter; The output terminal of described wave filter is connected with processor by comparer; The output terminal of described wave filter is connected with processor by real effective converter; Also comprise electrostatic induction device, described electrostatic induction device forms by responding to metal covering, shielded metal face and insulating trip; Described induction metal covering is fixed on the one side of insulating trip, the another side fixed mask metal covering of described insulating trip; Described induction metal covering is connected with the input end of discharge circuit; Described shielded metal face connects the earth; Described shielded metal face is fixed with piezoelectric bimorph oscillator; The positive pole of described piezoelectric bimorph oscillator is connected with the positive pole of power circuit; The negative pole of described piezoelectric bimorph oscillator is connected with the negative pole of described power circuit; The signal end of described piezoelectric bimorph oscillator is connected with the output terminal of pulse driver; The input end of described pulse driver is connected with processor;
Described in the control of described processor generation pulse signal, pulse driver drives piezoelectric bimorph oscillator vibration; The pulse signal that described processor produces described processor carries out phase demodulation differentiation processing with the signal that induction metal covering returns, and the direct current signal that real effective converter is sent to carries out analog-to-digital conversion process;
Described power circuit is powered to static on-line measurement instrument.
Preferably, described pulse driver is isolated form pulse driver.
Preferably, described processor is connected with computing machine by RS485 communication interface.
Preferably, described processor is connected with Temperature Humidity Sensor; Described Temperature Humidity Sensor converts Temperature Quantity and humidity amount to electric signal and imports described processor into.
The invention has the beneficial effects as follows: processor gating pulse driver drives piezoelectric bimorph oscillator dynamic of the present invention is answered metal covering vibration, have the advantages that driving voltage is low, vibration frequency is low, Oscillation Amplitude is large, can pass through intrinsic safety type certification of explosion protection, carry out online electrostatic detection and report to the police at oil product and flammable explosive gas accumulating place, fill up the blank in this field at present, on induction metal covering, can obtain enough inductive voltage and currents, there is the good linearity for final measured value.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention one.
Fig. 2 is the structural representation of electrostatic induction device.
Fig. 3 is the circuit theory diagrams of the embodiment of the present invention two.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
Embodiment mono-: as shown in Figure 1 and Figure 2, a kind of static on-line measurement instrument, comprises discharge circuit 1, and the output terminal of discharge circuit 1 is connected with the input end of wave filter 2; The output terminal of wave filter 2 is connected with processor 4 by comparer 3, the output terminal of wave filter 2 is connected with processor 4 by real effective converter 5, also comprise electrostatic induction device 6, electrostatic induction device 6 is made up of induction metal covering 7, shielded metal face 8 and insulating trip 9, induction metal covering 7 sticks on the one side of insulating trip 9, the another side of insulating trip 9 is pasted shielded metal face 8, and described induction metal covering 7 is connected with the input end of discharge circuit 1; Described shielded metal face 8 connects the earth; Described shielded metal face 8 is pasted with piezoelectric bimorph oscillator 10, the positive pole of piezoelectric bimorph oscillator 10 is connected with the positive pole of power circuit 11, the negative pole of piezoelectric bimorph oscillator 10 is connected with the negative pole of power circuit 11, the signal end of piezoelectric bimorph oscillator 10 is connected with the output terminal of pulse driver 12, and the input end of pulse driver 12 is connected with processor 4.
Described processor 4 produces pulse driver 12 described in pulse signal control and drives piezoelectric bimorph oscillator 10 to vibrate; The pulse signal that described processor 4 produces described processor 4 carries out phase demodulation differentiation processing with the signal that induction metal covering 7 returns, and the direct current signal that real effective converter is sent to carries out analog-to-digital conversion process.
Power circuit 11 is powered to static on-line measurement instrument.
Described power circuit 11 is 24V power supply, processor 4 produces pulse signal gating pulse driver 12 and produces pulse voltage, this pulse voltage drives piezoelectric bimorph oscillator 10 to produce vibration, thereby drive the induction metal covering 7 being connected with piezoelectric bimorph oscillator 10 to vibrate, therefore between static face and induction metal covering 7, form an alternating electric field, on induction metal covering 7, can obtain a sinusoidal damp type induced voltage, the amplitude of this sine damp type induced voltage is passed to wave filter 2 after being amplified 30 times by discharge circuit 1 linearity, wave filter 2 is removed unnecessary interference noise signal, retain useful signal, one group of this useful signal is given comparer 3 and is compared and enlarged processing, finally give processor 4 and do phase demodulation differentiation calculating, it is relatively to respond to the phase place of responding to alternating voltage on metal covering 7 and the phase place that imposes on piezoelectric bimorph oscillator pulse voltage that phase demodulation is differentiated the processing mode of calculating, thereby can judge that on static face, institute's static electrification is just or bears, another group signal is given real effective converter 5, real effective converter 5 is transformed into direct current signal AC signal, and then give processor 4 and make digital quantification treatment, processor 4 carries out digital filtering to conversion value, thereby obtains comparatively accurate electrostatic measurement value through calculating.
The present embodiment pulse driver 12 is isolated form pulse driver, the present embodiment wave filter 2 is second order Sallen-Key low-pass filter, induction metal covering 7 also can be bundled on insulating trip 9, shielded metal face 8 also can be bundled on insulating trip, and piezoelectric bimorph oscillator 10 also can be bundled on shielded metal face 8.
Embodiment bis-: as shown in Figure 3, the structure of the present embodiment is substantially the same manner as Example 1, and difference is: processor 4 is connected with computing machine by RS485 communication interface 13, and processor 4 is connected with Temperature Humidity Sensor 14; Temperature Humidity Sensor 14 converts Temperature Quantity and humidity amount to electric signal and imports processor 4 into.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (2)
1. a static on-line measurement instrument, comprises discharge circuit (1), and the output terminal of described discharge circuit (1) is connected with the input end of wave filter (2); The output terminal of described wave filter (2) is connected with processor (4) by comparer (3); The output terminal of described wave filter (2) is connected with processor (4) by real effective converter (5); It is characterized in that: also comprise electrostatic induction device (6), described electrostatic induction device (6) is made up of induction metal covering (7), shielded metal face (8) and insulating trip (9); Described induction metal covering (7) is fixed on the one side of insulating trip (9), the another side fixed mask metal covering (8) of described insulating trip (9); Described induction metal covering (7) is connected with the input end of discharge circuit (1); Described shielded metal face (8) connects the earth; Described shielded metal face (8) is fixed with piezoelectric bimorph oscillator (10); The positive pole of described piezoelectric bimorph oscillator (10) is connected with the positive pole of power circuit (11); The negative pole of described piezoelectric bimorph oscillator (10) is connected with the negative pole of described power circuit (11); The signal end of described piezoelectric bimorph oscillator (10) is connected with the output terminal of pulse driver (12); The input end of described pulse driver (12) is connected with processor (4);
Described in the control of described processor (4) generation pulse signal, pulse driver (12) drives piezoelectric bimorph oscillator (10) vibration; The pulse signal that described processor (4) produces described processor (4) carries out phase demodulation differentiation processing with the signal that induction metal covering (7) returns, and the direct current signal that real effective converter is sent to carries out analog-to-digital conversion process;
Described power circuit (11) is powered to static on-line measurement instrument;
Described processor (4) is connected with Temperature Humidity Sensor (14); Described Temperature Humidity Sensor (14) converts Temperature Quantity and humidity amount to electric signal and imports described processor (4) into.
2. static on-line measurement instrument as claimed in claim 1, is characterized in that: described pulse driver (12) is isolated form pulse driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110370545.8A CN102508050B (en) | 2011-11-21 | 2011-11-21 | Instrument for measuring static electricity on line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110370545.8A CN102508050B (en) | 2011-11-21 | 2011-11-21 | Instrument for measuring static electricity on line |
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| CN102508050A CN102508050A (en) | 2012-06-20 |
| CN102508050B true CN102508050B (en) | 2014-08-13 |
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| CN201110370545.8A Active CN102508050B (en) | 2011-11-21 | 2011-11-21 | Instrument for measuring static electricity on line |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499749B (en) * | 2013-10-15 | 2015-11-25 | 中国电子科技集团公司第三十八研究所 | A kind of electrostatic testing apparatus |
| CN105223425B (en) * | 2015-10-27 | 2018-05-18 | 上海斐讯数据通信技术有限公司 | Automatically system is destaticed |
| CN105527505B (en) * | 2016-01-26 | 2018-12-18 | 王雪颖 | A kind of capacitance-type vibration formula electrostatic transducer |
| CN106291143B (en) * | 2016-07-18 | 2021-03-19 | 北京东方计量测试研究所 | Electrostatic potential monitoring device and method |
| CN107329004A (en) * | 2016-12-02 | 2017-11-07 | 北京理工大学 | A kind of contactless MEMS autoexcitations stilling the theatre electrical resistivity survey examining system and its detection method based on electrostatic induction principle |
| TWI675202B (en) * | 2018-11-30 | 2019-10-21 | 財團法人工業技術研究院 | Electrostatic measuring system for inner wall of fluid pipeline and measuring method thereof |
| CN117110732B (en) * | 2023-10-25 | 2024-01-09 | 青岛澳波泰克安全设备有限责任公司 | Electrostatic detection system and electrostatic detection method for phase compensation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165453Y (en) * | 1993-06-01 | 1994-05-18 | 复旦大学 | Integrated digital electrostatic potentiometer |
| CN101949980A (en) * | 2010-09-03 | 2011-01-19 | 兰州大学 | Vibrating reed type electric field admeasuring apparatus |
| CN201903592U (en) * | 2010-11-09 | 2011-07-20 | 上海煤科实业有限公司 | Mine intrinsically safe electrostatic detector |
| CN202372578U (en) * | 2011-11-21 | 2012-08-08 | 重庆工业自动化仪表研究所 | Online static monitoring sensor |
-
2011
- 2011-11-21 CN CN201110370545.8A patent/CN102508050B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2165453Y (en) * | 1993-06-01 | 1994-05-18 | 复旦大学 | Integrated digital electrostatic potentiometer |
| CN101949980A (en) * | 2010-09-03 | 2011-01-19 | 兰州大学 | Vibrating reed type electric field admeasuring apparatus |
| CN201903592U (en) * | 2010-11-09 | 2011-07-20 | 上海煤科实业有限公司 | Mine intrinsically safe electrostatic detector |
| CN202372578U (en) * | 2011-11-21 | 2012-08-08 | 重庆工业自动化仪表研究所 | Online static monitoring sensor |
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| CN102508050A (en) | 2012-06-20 |
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Effective date of registration: 20190516 Address after: 400 700 Building 608, No. 1, 79 Tiansheng Road, Beibei District, Chongqing Co-patentee after: Chongqing Inst. of Industrial Automation Instrumentation Patentee after: Chongqing Zhongyu odd Flow Meter Co.,Ltd. Address before: 401123 District B, Yangliu Road, Middle Section of Huangshan Avenue, North Yubei District, Chongqing Patentee before: Chongqing Inst. of Industrial Automation Instrumentation |
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| TR01 | Transfer of patent right | ||
| CI03 | Correction of invention patent |
Correction item: Patentee|Address|Patentee Correct: CHONGQING ZHONGJUEZHENGQI FLOW METER CO.,LTD.|400 700 Building 608, No. 1, 79 Tiansheng Road, Beibei District, Chongqing|Chongqing Industrial Automation Instrumentation Inst. False: Chongqing Zhongyu odd Flow Meter Co.,Ltd.|400 700 Building 608, No. 1, 79 Tiansheng Road, Beibei District, Chongqing|Chongqing Industrial Automation Instrumentation Inst. Number: 23-01 Volume: 35 |
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| CI03 | Correction of invention patent |