CN202939886U - Simple capacitance and inductance measurement teaching instrument - Google Patents
Simple capacitance and inductance measurement teaching instrument Download PDFInfo
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- 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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- chip microcomputer
- inductance
- inductance measurement
- resonant frequency
- single chip
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Abstract
The utility model discloses a simple capacitance and inductance measurement teaching instrument which comprises a measurement circuit unit and a single chip microcomputer, wherein the measurement circuit unit includes a resonant frequency selection circuit constituted by an LC and an oscillation circuit formed by combining a voltage comparator and an RC, a to-be-tested capacitor and a to-be-tested inductor are in parallel or in series connection with the resonant frequency selection circuit to generate resonant frequency square waves, the resonant frequency square waves are transmitted to a control port of the single chip microcomputer, and the single chip microcomputer is further connected with a liquid crystal display unit and a voice output unit. The simple capacitance and inductance measurement teaching instrument is simple in structure, convenient to operate and convenient for teaching and has the functions of liquid crystal display, voice broadcast and the like; and the hardware resource of the single chip microcomputer is fully utilized, and intelligent capacitance and inductance measurement and display are realized.
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)
1. 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.
2. simple and easy capacitor and inductance measurement instruments used for education according to claim 1, is characterized in that, described single-chip microcomputer is Ling Yang SPCE061A.
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 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220639073 Expired - Fee Related 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 (8)
| 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 |
| CN111928969A (en) * | 2019-05-13 | 2020-11-13 | 惠州拓邦电气技术有限公司 | Pot temperature detection device, electromagnetic heating device and pot temperature detection method |
-
2012
- 2012-11-28 CN CN 201220639073 patent/CN202939886U/en not_active Expired - Fee Related
Cited By (12)
| 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 |
| CN108027255B (en) * | 2015-08-11 | 2021-06-29 | 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 |
| CN111928969A (en) * | 2019-05-13 | 2020-11-13 | 惠州拓邦电气技术有限公司 | Pot temperature detection device, electromagnetic heating device and pot temperature detection method |
| CN111928969B (en) * | 2019-05-13 | 2022-06-03 | 惠州拓邦电气技术有限公司 | Pot temperature detection device, electromagnetic heating device and pot temperature detection method |
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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: 20130515 Termination date: 20131128 |