CN202177668U - Experiment instrument for directly measuring electrostatic field - Google Patents
Experiment instrument for directly measuring electrostatic field Download PDFInfo
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- CN202177668U CN202177668U CN2011202260255U CN201120226025U CN202177668U CN 202177668 U CN202177668 U CN 202177668U CN 2011202260255 U CN2011202260255 U CN 2011202260255U CN 201120226025 U CN201120226025 U CN 201120226025U CN 202177668 U CN202177668 U CN 202177668U
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Abstract
The utility model relates to an experiment instrument for directly measuring an electrostatic field, which comprises an electric field generating device, a solid electrostatic field sensor, a signal amplifying circuit and a display circuit and is characterized in that the electric field generating device consists of an upper electrode plate, a lower electrode plate and an electric field voltage source connected with the two electrode plates, wherein the upper electrode plate and the lower electrode plate installed on an insulation support and are parallel metal plates which form a parallel-plate capacitor; the solid electrostatic field sensor is installed in a space between the upper electrode plate and the lower electrode plate, and a signal output end of the solid electrostatic field sensor is connected with the display circuit through the signal amplifying circuit. The experiment instrument for directly measuring the electrostatic field has the advantages that electric field voltage V, separation distance D or electric field values under medium of different parallel-plate capacitors can be researched, potentiometric surface and an electric field value curve of the electric field can be described, and the fact that the separation distance of the two electrode plates is changed and the electric field values are not changed when a power supply of the two electrode plates of the parallel-plate capacitor is switched off can be further researched, which can not be achieved by an analogue electrostatic field instrument.
Description
Technical field
The utility model relates to a kind of experiment instrument of direct measuring stationary electric field.
Background technology
In the electrostatic field of the College Physics experiment now; The direct measuring stationary electric field owing to have no idea; Can only adopt the current field analog electrostatic field to study the characteristic of electrostatic field; Its method is the voltage-electric field relationship consistency according to the current field of identical boundary condition, same position and electrostatic field, replaces electrostatic field with current field, and the voltage of measuring in the current field is confirmed equipotential surface.There are a lot of problems in this experimental technique: (1) can only obtain the equipotential surface of electric field, and can not obtain the Electric Field Numerical of measurement point; (2) measured voltage value and electric field do not have direct linear relationship, can not show this electric field value; (3) error is also bigger, need obtain the mean value of radius; (4) spacing is fixed, and can't study spacing to influence; (5) the supposition medium is single even, can't study different medium to electric field effects.Therefore demand developing the novel experiment instrument that can directly measure electric field urgently, to solve the problems referred to above that run in the present College Physics electrostatic field experiment.
Summary of the invention
The utility model provides a kind of experiment instrument of direct measuring stationary electric field; The utility model designs a kind of experiment instrument of direct measuring stationary electric field; Comprise electric field generation device, solid-state electrostatic field sensor and signal amplification circuit and display circuit; It is characterized in that: the electric field generation device is made up of two voltage of electric field sources that are installed in the pole plates on the insulating support and are connected with pole plate up and down; Solid-state electrostatic field sensor is installed in up and down in the space between two pole plates, and the signal output part of solid-state electrostatic field sensor connects display circuit by signal amplification circuit.It is characterized in that: two pole plates up and down that are installed on the insulating support are two parallel sheet metals, and two parallel sheet metals constitute plane-parallel capacitor.
The utility model has the advantages that: the capacitor that utilizes two parallel metal sheets to form produces the mark electric field; Under effect of electric field; The output voltage of solid-state electrostatic field sensor is directly proportional with the electric field value of this point, through amplifying and the A/D conversion, directly shows corresponding electric field value.Can study electric field value under voltage of electric field V, spacing d or the medium of different plane-parallel capacitors, depict equipotential surface, the electric field value curve of electric field, can also study behind the dump of plane-parallel capacitor two-plate, change polar plate spacing, electric field value is constant.All these all are that the analog electrostatic field appearance can't be accomplished.
Description of drawings
Fig. 1 is the synoptic diagram of experiment instrument of a kind of direct measuring stationary electric field of the utility model.
Embodiment
A kind of experiment instrument of direct measuring stationary electric field; Comprise electric field generation device, solid-state electrostatic field sensor and signal amplification circuit and display circuit; It is characterized in that: the electric field generation device is made up of two voltage of electric field sources that are installed in the pole plates on the insulating support and are connected with pole plate up and down; Solid-state electrostatic field sensor is installed in up and down in the space between two pole plates, and the signal output part of solid-state electrostatic field sensor connects display circuit by signal amplification circuit.It is characterized in that: two pole plates up and down that are installed on the insulating support are two parallel sheet metals, and two parallel sheet metals constitute plane-parallel capacitor.
Its principle of work is that the parallel metal sheet of plane-parallel capacitor and the insulating support of regulating the parallel metal distance between plates after the voltage of electric field source is added on the parallel metal sheet, produce electrostatic field at the parallel metal sheet zone line.Solid-state electrostatic field sensor is in electric field, and the magnitude of voltage of output is with the electric field change that vertically acts on sensor surface, and the output voltage variable quantity is directly proportional with electric field value, measures the variation of output voltage and just can directly read electric field value.
When (1) the parallel metal distance between plates d of plane-parallel capacitor is constant; Change the magnitude of voltage of the parallel metal sheet of plane-parallel capacitor, according to Gauss theorem, the parallel metal sheet zone line produces one electrostatic field; Its electric field value is directly proportional with the voltage of electric field value; The solid-state electrostatic field sensor of this electric field value process is converted into the variable quantity of output voltage, and it is directly proportional with added voltage, shows that promptly electric field value is directly proportional with magnitude of voltage.
When (2) the voltage of electric field value V of plane-parallel capacitor is constant; Change the spacing of the parallel metal sheet of plane-parallel capacitor, according to Gauss theorem, the parallel metal sheet zone line produces a uniform electrostatic field; The distance values d of its electric field value and parallel metal sheet is inversely proportional to; This electric field value is through electric field induction element: solid-state electrostatic field sensor is converted into the variable quantity of output voltage, is inversely proportional to the distance values d of parallel metal sheet, shows that promptly the distance values d of electric field value and parallel metal sheet is inversely proportional to.
When (3) the parallel metal sheet magnitude of voltage V of plane-parallel capacitor and spacing are all constant; Medium between the parallel metal sheet of change plane-parallel capacitor; For example insert plank, sheet metal etc., the capacity of parallel plate capacitor value increases, and the electric density of metal polar plate increases with the capacitance equal proportion.The plank that remove to insert, sheet metal etc. are with exterior portions, and specific inductive capacity is constant, and according to Gauss theorem, electric field increases with the increase of the electric density of metal polar plate, shows that promptly electric field value increases with medium.
The special case of Fig. 1, the voltage of electric field source provides variable voltage of electric field, comprises that 1 switch, 2 voltage-regulation, 3 voltages show and 4,5 binding posts, five parts.Regulate 2 voltage-regulation and change the voltage of electric field value, and on 3 voltages show, show the voltage of electric field size, be connected to the last bottom crown of plate condenser through 4,5 binding posts.Plane-parallel capacitor comprises metal polar plate and 9 times metal polar plates on 8,6,7 binding posts that link to each other with the voltage of electric field source, and 10 insulation grounded brackets, 11 insulating supports produce a uniform electrostatic field at the parallel metal sheet zone line.Adjusting plate condenser spacing, medium can change electric field.12 solid-state electrostatic field sensors have that volume is little, cost is low, can large-scale production etc. advantage, be the core of the utility model.The electrostatic field that produces when plane-parallel capacitor is when solid-state electrostatic field sensor, and the output voltage of sensor changes.The signal amplification comprises that with demonstration 13,14,15 binding posts link to each other with 12 solid-state electrostatic field sensors, and 16 switches, 17 begin measurement, 18 and stop to show with 19 electric fields.The output voltage signal of solid-state electrostatic field sensor is after the amplifying circuit method; By in the display circuit with the A/D modular converter change into digital signal; Being transferred in the display circuit with the single-chip microcomputer is the control core resume module, send the display module in the display circuit to show electric field value then.
Claims (2)
1. the experiment instrument of a direct measuring stationary electric field; Comprise electric field generation device, solid-state electrostatic field sensor and signal amplification circuit and display circuit; It is characterized in that: the electric field generation device is made up of two voltage of electric field sources that are installed in the pole plates on the insulating support and are connected with pole plate up and down; Solid-state electrostatic field sensor is installed in up and down in the space between two pole plates, and the signal output part of solid-state electrostatic field sensor connects display circuit by signal amplification circuit.
2. by the experiment instrument of the described a kind of direct measuring stationary electric field of claim 1, it is characterized in that: two pole plates up and down that are installed on the insulating support are two parallel sheet metals, and two parallel sheet metals constitute plane-parallel capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202260255U CN202177668U (en) | 2011-06-30 | 2011-06-30 | Experiment instrument for directly measuring electrostatic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202260255U CN202177668U (en) | 2011-06-30 | 2011-06-30 | Experiment instrument for directly measuring electrostatic field |
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| Publication Number | Publication Date |
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| CN202177668U true CN202177668U (en) | 2012-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202260255U Expired - Fee Related CN202177668U (en) | 2011-06-30 | 2011-06-30 | Experiment instrument for directly measuring electrostatic field |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736051A (en) * | 2012-06-29 | 2012-10-17 | 中国工程物理研究院化工材料研究所 | Electrostatic detection calibrator |
| CN103091567A (en) * | 2013-02-05 | 2013-05-08 | 南京信息工程大学 | Instrument and method for space electric charge density measurement |
| CN103336184A (en) * | 2013-05-31 | 2013-10-02 | 广东电网公司电力科学研究院 | Space charge density measuring device |
| CN103576003A (en) * | 2013-11-21 | 2014-02-12 | 中国科学院空间科学与应用研究中心 | Radioactive source based portable space electric field detector and measuring method thereof |
| CN109061324A (en) * | 2018-09-27 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of electrostatic field electric field intensity measuring device and method |
| RU2695111C1 (en) * | 2018-03-01 | 2019-07-19 | Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности "РОСКОСМОС" | Miniature measuring instrument of parameters of electric power supply of spacecrafts with microsystem vibration electric field modulator |
| CN110596472A (en) * | 2019-09-29 | 2019-12-20 | 清华大学 | Dielectric polarization capacitance type electrostatic field measuring method and system |
| RU198171U1 (en) * | 2019-05-28 | 2020-06-22 | Акционерное Общество "Центр Прикладной Физики Мгту Им. Н.Э. Баумана" | ELECTROSTATIC FIELD RESEARCH DEVICE |
-
2011
- 2011-06-30 CN CN2011202260255U patent/CN202177668U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102736051A (en) * | 2012-06-29 | 2012-10-17 | 中国工程物理研究院化工材料研究所 | Electrostatic detection calibrator |
| CN103091567A (en) * | 2013-02-05 | 2013-05-08 | 南京信息工程大学 | Instrument and method for space electric charge density measurement |
| CN103091567B (en) * | 2013-02-05 | 2014-12-17 | 南京信息工程大学 | Instrument and method for space electric charge density measurement |
| CN103336184A (en) * | 2013-05-31 | 2013-10-02 | 广东电网公司电力科学研究院 | Space charge density measuring device |
| CN103576003A (en) * | 2013-11-21 | 2014-02-12 | 中国科学院空间科学与应用研究中心 | Radioactive source based portable space electric field detector and measuring method thereof |
| RU2695111C1 (en) * | 2018-03-01 | 2019-07-19 | Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности "РОСКОСМОС" | Miniature measuring instrument of parameters of electric power supply of spacecrafts with microsystem vibration electric field modulator |
| CN109061324A (en) * | 2018-09-27 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of electrostatic field electric field intensity measuring device and method |
| CN109061324B (en) * | 2018-09-27 | 2020-11-03 | 云南电网有限责任公司电力科学研究院 | Electrostatic field intensity measuring device and method |
| RU198171U1 (en) * | 2019-05-28 | 2020-06-22 | Акционерное Общество "Центр Прикладной Физики Мгту Им. Н.Э. Баумана" | ELECTROSTATIC FIELD RESEARCH DEVICE |
| CN110596472A (en) * | 2019-09-29 | 2019-12-20 | 清华大学 | Dielectric polarization capacitance type electrostatic field measuring method and system |
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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: 20120328 Termination date: 20120630 |