CN201222081Y - Passive non-contact type surface potential probe - Google Patents
Passive non-contact type surface potential probe Download PDFInfo
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- CN201222081Y CN201222081Y CNU2008201086724U CN200820108672U CN201222081Y CN 201222081 Y CN201222081 Y CN 201222081Y CN U2008201086724 U CNU2008201086724 U CN U2008201086724U CN 200820108672 U CN200820108672 U CN 200820108672U CN 201222081 Y CN201222081 Y CN 201222081Y
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Abstract
The utility model relates to a passive non-contact-type surface potential probe, which comprises a front end probe and a charge sensor, wherein the front end probe and the charge sensor are integrated through an adapter, the front end probe is composed of an induction electrode, a reference electrode, a metal shielding case and the adapter, an electrode in the adapter is sleeved in an insulation sheet, the insulation sheet is mounted between a hollow lower insulation block and a tail end insulation block, the outer wall of the tail end insulation block is equipped with threads, the other end of the adapter is electrically connected with the charge sensor, and also can be electrically connected with the charge sensor after connecting with a coaxial cable. When the probe approaches the surface of an object, induction charge is generated on the induction electrode, the quantity of the induction charge is relative to the potential on the surface of the object, the reference electrode can not generate charge after being shielded, further, the charge sensor detects charge dispersion between the induction electrode and the reference electrode, and obtains the potential on the surface of the object. The utility model simplifies the structure of a surface potential detection system, and reduces the cost of a detection device.
Description
Technical field
The utility model relates to a kind of probe of determination object thing surface potential, particularly relates to the probe of a kind of passive contact-free ground determination object thing surface potential.
Background technology
At present, there is the electrostatic measuring device of measuring insulant surface institute static electrification current potential untouchablely.
This electrostatic equipment adopts following principle: will pop one's head near object, because of electrostatic induction probe front end sheet metal has induced charge; To the power supply of probe internal reference electrode, make it have certain potentials; Utilize oscillator to produce electroacoustic wave, with the reference electrode in electroacoustic wave scanning head front end sheet metal and the probe, the reflection wave of receiving transducer front end sheet metal and reference electrode; Change the current potential on the reference electrode, simultaneously two groups of reflection waves are compared; When two groups of reflection waves coupling, the numerical value of current potential on the reference electrode is carried out calculation process, draw the measurement result of object surface potential.
In the measurement of above-mentioned electrostatic equipment, measurement result not only depends on the surface potential of object, also depends on the distance of probe and object.Therefore, if distance is different, then measurement result also can be different even surface potential is identical.So position of necessary static probe during measuring.Because above-mentioned probe internal reference electrode has high voltage, probe has the discharge risk to external world, and probe must be fixed and human body can not touch probe with insulating material during the measurement.
The measuring accuracy of above-mentioned electrostatic equipment depends on accurate reception and the processing to two groups of reflection electroacoustic waves.If use probe under vacuum condition, signal demand is transferred to external instrument through vacuum wall on the probe, and vacuum switching cost is high and cause distorted signals easily, and then causes measurement result inaccurate.Therefore above-mentioned electrostatic equipment is not suitable for directly using under the vacuum condition.
Above-mentioned electrostatic equipment comprises regulated power supply, the system that transmits and receives of electroacoustic wave signal, signal processing system, and data read and arithmetic system etc.Measurement result needs specialized. circuit modules could realize real-time storage.So the volume ratio of device is big and cost is high.
Summary of the invention
One of the purpose of this utility model is to provide a kind of surface potential probe of passive contact-free; This surface potential probe has switchover capability, is convenient to use under vacuum condition;
Two of purpose is to simplify surface potential detection system structure, reduces the sniffer cost.
Be to realize the purpose of this utility model, the utility model by the following technical solutions:
The surface potential probe of passive contact-free of the present utility model comprises front-end probe 106 and charge sensor 105, it is characterized in that described front-end probe 106 is connected one with described charge sensor 105 by an adapter 104;
Described front-end probe 106 is by induction electrode 101, reference electrode 103, and metal shielding 102 and described adapter 104 are formed; Wherein said induction electrode 101 is a sheet metal, is fixed on metal shielding 102 upper port of described front-end probe 106 by front end insulating lid 312, and a guiding sheet metal 302 is arranged on described induction electrode 101 bottom surfaces; First Metallic rod 305 of an outer casing spring 304 is withstood described guiding sheet metal 302, described first Metallic rod 305 is connected to adapter internal electrode 318 through first lead 316 and second resistance 317, and the other end of lead is electrically connected with described adapter 106; Described spring 304 is installed on the hollow in the collets 314, collets 314 are fixed together with the supports insulative piece 303 that is installed under the front end insulating lid 312 on the described hollow, collets 303 are fixed on the described hollow below the collets 314 under the hollow, described reference electrode 307 is fixed under the described hollow in the collets 306, be connected on one second lead 309 through one second Metallic rod 308, be communicated on the adapter internal electrode 318 through second resistance 310 again;
Described adapter internal electrode 318 is sleeved in the insulating trip 319, and described insulating trip 319 is installed under the described hollow between the collets 306 and tail end collets 321, on described tail end collets 321 outer walls screw thread 320 is arranged; The other end of described adapter 104 is electrically connected with charge sensor 105, also can join with concentric cable after transfer and connect charge sensor and be electrically connected.
In above-mentioned technical scheme, described charge sensor can adopt 2132 type sensors of U.S. PASCO company, also can adopt other to have the charge sensor of same-interface.
When induction electrode when the object because the electrostatic induction principle, the induction electrode back side can produce induced charge; Reference electrode is in the middle of the probe, because the shielding action of the metal shielding that is subjected to popping one's head in does not produce induced charge near object the time; This moment, charge sensor detected electric charge residual quantity on induction electrode and the reference electrode; The electric charge residual quantity is relevant with object surface potential size, obtains the object surface potential after converting.
Detection process of the present utility model is: during the close object of probe surface, produce induced charge on induction electrode, the size of induced charge amount is relevant with object surface potential size; Reference electrode does not produce induced charge owing to be subjected to shielding; Electric charge residual quantity between charge sensor detection sensor electrode and reference electrode, its result imports display instrument, obtains the object surface potential.
Compared with the prior art, the utlity model has following advantage
1, front-end probe inside need not power, and the front-end probe risk of not discharging to external world can be fixed with various materials, and to not injury of human body.
2, the front-end probe internal circuit configuration is simple, and adapter can use concentric cable to connect on the front-end probe, is applicable to the various occasions that need switching such as vacuum.
3, sniffer only comprises front-end probe, charge sensor and display device, and compact volume and convenience, with low cost.
4, can select dissimilar charge sensors for use, realize the conversion of range and measuring accuracy.
Description of drawings
Fig. 1 is the surface potential sonde configuration synoptic diagram of passive contact-free of the present utility model
Fig. 2 surveys current potential with variable in distance scale-up factor correction figure
Fig. 3 is the front-end probe structural representation in the utility model probe
The drawing explanation:
101. induction electrode, 102. metal shieldings, 103. reference electrodes,
104. adapter, 105. charge sensors, 106. front-end probes.
301. induction metal plate, 302. guiding sheet metals, 303. supports insulative pieces,
304. spring, 305. first Metallic rod, 306. times collets,
307. reference electrode, 308. second Metallic rod, 309. second leads,
310. second resistance, 312. front end insulating lids, 313. front end screw threads,
314. last collets, 316. first leads, 317. first resistance,
318. electrode in the adapter, 319. insulating trips, 320. tail end screw threads,
321. tail end insulating lid.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
With reference to figure 1, make a kind of surface potential probe of passive contact-free of utility model.
Pop one's head in the present embodiment and be made up of front-end probe 106 and charge sensor 105, wherein charge sensor 105 can directly connect front-end probe 106 through adapter 104, also can be through the concentric cable switching.Charge sensor 105 can adopt 2132 type sensors of U.S. PASCO company, also can adopt other to have the charge sensor of same-interface.
Wherein front-end probe 106 comprises induction electrode 101, metal shielding 102, reference electrode 103 and adapter 104.Metal shielding 102 is shells of front-end probe, for example makes of an aluminum cylinder cover, and the reference electrode in the collets is played the electrostatic screening effect.
With reference to structure shown in Figure 3, make the front-end probe of a present embodiment.It is suitable for reading that front end insulating lid 312 is fixed on metal shielding 102 among the figure, and the guiding sheet metal 302 and first Metallic rod 305 weld together.Spring 304 is enclosed within outside first Metallic rod 305, and is fixed in collets 314 chambeies by last collets 314, and this spring 304 is jack-up guiding sheet metal 302 upwards, and it is closely contacted with induction metal plate 301.One front end insulating lid, 312 endoporus are sleeved on the cylinder outer wall of last collets 314 projections, the induction metal plate 301 of one metallic copper is arranged in the front end insulating lid 312, be in the supports insulative piece 303 upper surface grooves, screw fixing with the internal thread of supports insulative piece 303 by the front end screw thread 313 in the front end insulating lid 312.Following collets 306 are arranged on collets 314 bottoms.Front end insulating lid 312 and supports insulative piece 303 are made by low-k high resistant insulating material, and commonly used have a teflon etc.
First Metallic rod 305 is connected on the adapter internal electrode 318 through first lead 316 and first resistance 317.Reference electrode 307 is fixed on down in collets 306 inner chambers, is connected on second lead 309 through second Metallic rod 308, is electrically connected with adapter internal electrode 318 through second resistance 310 again, is installed in the metal shielding 102.First resistance 317 and second resistance 310 are selected best resistance according to charge sensor, are 50 ohm for 2132 type sensors resistance commonly used.
When popping one's head near object, induction metal plate 301 produces induced charge at the back.Guide sheet metal 302 this moment owing to be close to induction metal plate 301 back sides, the induced charge that also has fixed proportion on the guiding sheet metal 302.Reference electrode 307 is subjected to the shielding action of metal shielding 315, does not produce induced charge, so has the electric charge residual quantity on reference electrode 307 and the guiding sheet metal 302.
Fixedly front-end probe and object distance, when the object surface potential is big more, the induced charge on the front-end probe guiding sheet metal 302 is many more, and induced charge amount size is big or small linear with the object surface potential.Detect reference electrode 307 and the electric charge residual quantity of guiding between the sheet metal 302 by charge sensor, its result imports display instrument, obtains the object surface potential.
If increase the distance of probe and object, the induced charge amount on the guiding sheet metal 302 is exponential damping, and induced charge amount and object surface potential magnitude proportion coefficient will change, as shown in Figure 2.Therefore in this embodiment, must demarcate the scale-up factor of different distance earlier, measure behind the formulation scale-up factor correction chart.
After obtaining the scale-up factor correction chart, distance between probe by record and object is revised result of detection, realizes the measurement of object surface potential.
In the above-described embodiment, the measuring accuracy of object surface potential and range depend on the charge resolution and the range of charge sensor.Can realize the change of sniffer precision and range by the charge sensor of changing different model.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and modification according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (2)
1. a passive contact-free surface potential probe comprises front-end probe (106) and charge sensor (105), it is characterized in that described front-end probe (106) is connected one with described charge sensor (105) by an adapter (104);
Described front-end probe (106) is by induction electrode (101), reference electrode (103), and metal shielding (102) and described adapter (104) are formed; Wherein said induction electrode (101) is a sheet metal, is fixed on metal shielding (102) upper port of described front-end probe (106) by front end insulating lid (312), and a guiding sheet metal (302) is arranged on described induction electrode (101) bottom surface; First Metallic rod (305) of an outer casing spring (304) is withstood described guiding sheet metal (302), described first Metallic rod (305) is connected to adapter internal electrode (318) through first lead (316) and second resistance (317), and the other end of lead is electrically connected with described adapter (106); Described spring (304) is installed on the hollow in the collets (314), collets on the described hollow (314) are fixed together with the supports insulative piece (303) that is installed under the front end insulating lid (312), collets (303) are fixed on below the collets on the described hollow (314) under the hollow, described reference electrode (307) is fixed in the collets under the described hollow (306), be connected on one second lead (309) through one second Metallic rod (308), be communicated on the adapter internal electrode (318) through second resistance (310) again;
Described adapter internal electrode (318) is sleeved in the insulating trip (319), described insulating trip (319) is installed between collets under the described hollow (306) and the tail end collets (321), on described tail end collets (321) outer wall screw thread (320) is arranged; The other end of described adapter (104) is electrically connected with charge sensor (105), or joins with concentric cable after transfer and connect charge sensor (105) and be electrically connected.
2. according to the described passive contact-free surface potential probe of claim 1, it is characterized in that described charge sensor (105) adopts 2132 type sensors of U.S. PASCO company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086724U CN201222081Y (en) | 2008-06-06 | 2008-06-06 | Passive non-contact type surface potential probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201086724U CN201222081Y (en) | 2008-06-06 | 2008-06-06 | Passive non-contact type surface potential probe |
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| CN201222081Y true CN201222081Y (en) | 2009-04-15 |
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| CNU2008201086724U Expired - Fee Related CN201222081Y (en) | 2008-06-06 | 2008-06-06 | Passive non-contact type surface potential probe |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110169508A1 (en) * | 2008-06-27 | 2011-07-14 | Rechner Industrie-Elektronik Gmbh | Inductive sensor |
| CN102411095A (en) * | 2011-08-10 | 2012-04-11 | 中国科学院空间科学与应用研究中心 | Active static electric field probe |
| CN102539848A (en) * | 2010-12-21 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Probe assembly |
| CN102865884A (en) * | 2012-03-21 | 2013-01-09 | 李彤阳 | Non-contact sensor |
| CN103018518A (en) * | 2012-11-27 | 2013-04-03 | 中国航天科技集团公司第五研究院第五一〇研究所 | Arrangement and optimization method of vibration capacitance type sensor capable of monitoring surface potential of spacecraft |
| CN103837753A (en) * | 2014-02-27 | 2014-06-04 | 国家电网公司 | Insulator surface electric charge online measuring probe and measuring method thereof |
| CN104345230A (en) * | 2013-08-07 | 2015-02-11 | 山东省纺织科学研究院 | Voltage-applying probe testing device for static decay test |
| CN104990964A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | PH and ORP sensor with protective device |
| CN106908860A (en) * | 2017-05-09 | 2017-06-30 | 四川中光防雷科技股份有限公司 | A kind of Lightning Warning system |
| CN110376439A (en) * | 2019-08-16 | 2019-10-25 | 广州特种机电设备检测研究院 | A kind of non-metal material surface resistance testing device |
| CN111103466A (en) * | 2018-10-25 | 2020-05-05 | 耐克森公司 | Cable joint with integrated space charge detector |
-
2008
- 2008-06-06 CN CNU2008201086724U patent/CN201222081Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110169508A1 (en) * | 2008-06-27 | 2011-07-14 | Rechner Industrie-Elektronik Gmbh | Inductive sensor |
| US9651401B2 (en) * | 2008-06-27 | 2017-05-16 | Rechner Industrie-Elektronik Gmbh | Inductive sensor |
| CN102539848A (en) * | 2010-12-21 | 2012-07-04 | 鸿富锦精密工业（深圳）有限公司 | Probe assembly |
| CN102411095A (en) * | 2011-08-10 | 2012-04-11 | 中国科学院空间科学与应用研究中心 | Active static electric field probe |
| CN102411095B (en) * | 2011-08-10 | 2013-10-16 | 中国科学院空间科学与应用研究中心 | Active static electric field probe |
| CN102865884A (en) * | 2012-03-21 | 2013-01-09 | 李彤阳 | Non-contact sensor |
| CN103018518A (en) * | 2012-11-27 | 2013-04-03 | 中国航天科技集团公司第五研究院第五一〇研究所 | Arrangement and optimization method of vibration capacitance type sensor capable of monitoring surface potential of spacecraft |
| CN103018518B (en) * | 2012-11-27 | 2015-06-10 | 中国航天科技集团公司第五研究院第五一〇研究所 | Arrangement and optimization method of vibration capacitance type sensor capable of monitoring surface potential of spacecraft |
| CN104345230B (en) * | 2013-08-07 | 2015-12-23 | 山东省纺织科学研究院 | The pressurization probe experiments device of electrostatic attenuation test |
| CN104345230A (en) * | 2013-08-07 | 2015-02-11 | 山东省纺织科学研究院 | Voltage-applying probe testing device for static decay test |
| CN103837753A (en) * | 2014-02-27 | 2014-06-04 | 国家电网公司 | Insulator surface electric charge online measuring probe and measuring method thereof |
| CN104990964A (en) * | 2015-06-24 | 2015-10-21 | 中山欧麦克仪器设备有限公司 | PH and ORP sensor with protective device |
| CN106908860A (en) * | 2017-05-09 | 2017-06-30 | 四川中光防雷科技股份有限公司 | A kind of Lightning Warning system |
| CN111103466A (en) * | 2018-10-25 | 2020-05-05 | 耐克森公司 | Cable joint with integrated space charge detector |
| CN110376439A (en) * | 2019-08-16 | 2019-10-25 | 广州特种机电设备检测研究院 | A kind of non-metal material surface resistance testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090415 Termination date: 20130606 |