CN202939886U - Simple capacitance and inductance measurement teaching instrument - Google Patents

Simple capacitance and inductance measurement teaching instrument Download PDF

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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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CN
China
Prior art keywords
chip microcomputer
inductance
capacitance
circuit
inductance measurement
Prior art date
Application number
CN 201220639073
Other languages
Chinese (zh)
Inventor
李亮
Original Assignee
成都捷康特科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to CN 201220639073 priority Critical patent/CN202939886U/en
Application granted granted Critical
Publication of CN202939886U publication Critical patent/CN202939886U/en

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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

Simple and easy capacitor and inductance measurement instruments used for education

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.
CN 201220639073 2012-11-28 2012-11-28 Simple capacitance and inductance measurement teaching instrument CN202939886U (en)

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 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)

* Cited by examiner, † Cited by third party
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

Cited By (9)

* Cited by examiner, † Cited by third party
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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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