CN202939886U - Simple capacitance and inductance measurement teaching instrument - Google Patents
Simple capacitance and inductance measurement teaching instrument Download PDFInfo
- Publication number
- CN202939886U CN202939886U CN 201220639073 CN201220639073U CN202939886U CN 202939886 U CN202939886 U CN 202939886U CN 201220639073 CN201220639073 CN 201220639073 CN 201220639073 U CN201220639073 U CN 201220639073U CN 202939886 U CN202939886 U CN 202939886U
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- China
- Prior art keywords
- chip microcomputer
- inductance
- capacitance
- circuit
- inductance measurement
- Prior art date
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- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 239000004973 liquid crystal related substances Substances 0.000 claims abstract description 7
- 230000003534 oscillatory Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 1
- 238000004832 voltammetry Methods 0.000 description 1
Abstract
Description
Technical field
The utility model relates to teaching equipment, is specifically related to a kind of simple and easy capacitor and inductance measurement instruments used for education.
Background technology
Electric capacity, inductance are the most basic, the most frequently used elements of forming circuit.In electronic system design, the accurate measurement of electric capacity, inductance has great importance to developing high-quality electronic product, and now practical, convenient, cheap electric capacity, inductance measurement instrument be seldom on market.The measurement of electric capacity, inductance value is generally to adopt alternating current bridge method and voltammetry, these methods not only the metering circuit complexity and also Measuring Time longer, be not suitable with Quick Measurement.
The utility model content
For above-mentioned prior art, the purpose of this utility model is to provide a kind of instruments used for education of energy Quick Measurement capacitor and inductor, facilitates experimental teaching.
Survey the reason principle: capacitance, inductance value are all non electrical quantities, can't directly measure, and utilize the selecting frequency characteristic of capacitor C, inductance L antiresonant circuit, and its numerical measuring is changed into frequency measurement, draw electric capacity, inductance value in conjunction with Technology of Frequency Measurement by Using.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of simple and easy capacitor and inductance measurement instruments used for education, it is characterized in that, comprise metering circuit unit, single-chip microcomputer, described metering circuit unit comprises the oscillatory circuit that the resonant selecting frequency circuit that is made of LC and voltage comparator form in conjunction with RC, testing capacitance, inductance in parallel or series connection enter the resonant selecting frequency circuit, produce the resonance frequency square wave, described resonance frequency square wave is sent to the control mouth of single-chip microcomputer, and described single-chip microcomputer also connects a liquid crystal display and a voice-output unit.
Described single-chip microcomputer is Ling Yang SPCE061A.
Compared with prior art, the beneficial effects of the utility model show:
One, the utility model is simple in structure, and is easy to operate, conveniently imparts knowledge to students and has the functions such as liquid crystal display and voice broadcast;
Two, take full advantage of the hardware resource of single-chip microcomputer, realize electric capacity, inductance value intelligent measure and demonstration.
Description of drawings
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the metering circuit figure of electric capacity;
Fig. 3 is the metering circuit figure of inductance.
Embodiment
The utility model will be further described below in conjunction with the drawings and the specific embodiments.
A kind of simple and easy capacitor and inductance measurement instruments used for education, comprise metering circuit unit, single-chip microcomputer, described metering circuit unit comprises the oscillatory circuit that the resonant selecting frequency circuit that is made of LC and voltage comparator form in conjunction with RC, testing capacitance, inductance in parallel or series connection enter the resonant selecting frequency circuit, produce the resonance frequency square wave, described resonance frequency square wave is sent to the control mouth of single-chip microcomputer, and described single-chip microcomputer also connects a liquid crystal display and a voice-output unit.During the circuit calibration, the Single-chip Controlling mouth is low level or high level, obtains reference frequency F1 or calibration frequency F2, can obtain the reference value of electric capacity and inductance; During measurement, measure testing capacitance or inductance by switching over, testing capacitance, inductance in parallel or series connection enter the resonant selecting frequency circuit, select the resonance frequency square wave, and this square-wave signal is sent in single-chip microcomputer can realize frequency measurement.
The utility model is simple in structure, and is easy to operate, conveniently imparts knowledge to students and has the functions such as liquid crystal display and voice broadcast; Take full advantage of the hardware resource of single-chip microcomputer, realize electric capacity, inductance value intelligent measure and demonstration.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220639073 CN202939886U (en) | 2012-11-28 | 2012-11-28 | Simple capacitance and inductance measurement teaching instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220639073 CN202939886U (en) | 2012-11-28 | 2012-11-28 | Simple capacitance and inductance measurement teaching instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202939886U true CN202939886U (en) | 2013-05-15 |
Family
ID=48324113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220639073 CN202939886U (en) | 2012-11-28 | 2012-11-28 | Simple capacitance and inductance measurement teaching instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202939886U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399189A (en) * | 2013-07-25 | 2013-11-20 | 西华师范大学 | Multifunctional alternating current circuit parameter test and feature demonstrating device |
| CN103424631A (en) * | 2013-07-12 | 2013-12-04 | 福建二菱电子有限公司 | Intelligent LC meter |
| CN103760424A (en) * | 2014-01-18 | 2014-04-30 | 张新安 | Q instrument capable of measuring large capacitance through series connection comparison method |
| CN105388364A (en) * | 2015-11-03 | 2016-03-09 | 新乡学院 | Inductance measurement circuit |
| CN106841819A (en) * | 2017-03-14 | 2017-06-13 | 南宁市高光信息技术有限公司 | A kind of capacitor and inductance measurement system |
| CN108027255A (en) * | 2015-08-11 | 2018-05-11 | 大陆-特韦斯股份有限公司 | Electronic control device |
| CN109342823A (en) * | 2018-09-29 | 2019-02-15 | 北京长城华冠汽车科技股份有限公司 | Measuring circuit, control method and the electric car of Y capacitance |
-
2012
- 2012-11-28 CN CN 201220639073 patent/CN202939886U/en not_active IP Right Cessation
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424631A (en) * | 2013-07-12 | 2013-12-04 | 福建二菱电子有限公司 | Intelligent LC meter |
| CN103399189A (en) * | 2013-07-25 | 2013-11-20 | 西华师范大学 | Multifunctional alternating current circuit parameter test and feature demonstrating device |
| CN103399189B (en) * | 2013-07-25 | 2016-03-02 | 西华师范大学 | A kind of Multifunction AC circuit parameter testing and characteristic demonstration device |
| CN103760424A (en) * | 2014-01-18 | 2014-04-30 | 张新安 | Q instrument capable of measuring large capacitance through series connection comparison method |
| CN108027255A (en) * | 2015-08-11 | 2018-05-11 | 大陆-特韦斯股份有限公司 | Electronic control device |
| CN105388364A (en) * | 2015-11-03 | 2016-03-09 | 新乡学院 | Inductance measurement circuit |
| CN106841819A (en) * | 2017-03-14 | 2017-06-13 | 南宁市高光信息技术有限公司 | A kind of capacitor and inductance measurement system |
| CN109342823A (en) * | 2018-09-29 | 2019-02-15 | 北京长城华冠汽车科技股份有限公司 | Measuring circuit, control method and the electric car of Y capacitance |
| CN109342823B (en) * | 2018-09-29 | 2020-12-01 | 北京长城华冠汽车科技股份有限公司 | Measuring circuit and control method of Y capacitor and electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20131128 |
|
| C17 | Cessation of patent right |