CN202443090U - Online capacitor polarity tester - Google Patents
Online capacitor polarity tester Download PDFInfo
- Publication number
- CN202443090U CN202443090U CN201220017601XU CN201220017601U CN202443090U CN 202443090 U CN202443090 U CN 202443090U CN 201220017601X U CN201220017601X U CN 201220017601XU CN 201220017601 U CN201220017601 U CN 201220017601U CN 202443090 U CN202443090 U CN 202443090U
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- capacitor
- polarity
- polarity tester
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Abstract
The utility model discloses an online capacitor polarity tester, which comprises a singlechip microcomputer, a liquid crystal display circuit connected with the output end of the singlechip microcomputer, a voice broadcasting circuit and a signal source, wherein the output end of the signal source is connected with one end of a detected online capacitor, and the other end of the tested online capacitor is connected with the input end of an AD (Analog/Digital) acquisition circuit; and the output end of the AD acquisition circuit is connected with the input end of the singlechip microcomputer. The online capacitor polarity tester further comprises a double four-to-one analog switch which is connected with the singlechip microcomputer and controlled by the singlechip microcomputer. The positive pole and the negative pole of the tested online capacitor and a shell are respectively connected with the signal source. The online capacitor polarity tester disclosed by the utility model realizes the purpose of accurately detecting the polarity of the capacitor on line, is smaller in volume, low in cost and portable and can be better suitable for various capacitor polarity detection occasions; the online capacitor polarity tester is safe and highly-efficient due to adoption of a three-terminal test method; the online capacitor polarity tester can inform a user the polarity of the detected capacitor in real time through a voice broadcasting function and is convenient for the user to use; and the online capacitor polarity tester adopts various test connectors, gets rid of the traditional single test head and is flexible to use and more humanized.
Description
Technical field
The utility model relates to a kind of testing tool that is used for electronic component, particularly relates to a kind of online electric capacity polarity tester.
Background technology
Existing ICT on-line testing appearance has such function; But it is mainly used in the inspection of problems such as electronic product missing part, folding pin, short circuit, Xi Qiao, reverse, wrong part, open circuit, failure welding; Therefore this type of instrument volume is very big, costs an arm and a leg, and semiworks can not be popularized; And some factories of some function also may not necessarily use on, will cause unnecessary waste like this.The measuring method that conventional online is surveyed the electric capacity use is a leakage current, will cause damage to original circuit because of current problems like this, or the injury measured capacitance, cause unnecessary loss.The test splice of existing product all is single shape, can not conveniently be suitable for various test environments.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of online electric capacity polarity tester is provided, and can realize online electric capacity being carried out accurate polarity test, and volume is little, is easy to carry about with one, and cost is low, and applicability is strong, and is safe and efficient.
In order to achieve the above object; The technical scheme that the utility model adopts is: a kind of online electric capacity polarity tester; Described tester comprises single-chip microcomputer, the liquid crystal display circuit that is connected with the output terminal of single-chip microcomputer, voice broadcast circuit, signal source; The output terminal of signal source is connected with a tested end at line capacitance, tested input end in the other end connection AD of line capacitance Acquisition Circuit, and the output terminal of AD Acquisition Circuit connects the input end of single-chip microcomputer.
Further, described tester also comprises and is connected with single-chip microcomputer and selects an analog switch by monolithic processor controlled two four.
Further described tested be electrochemical capacitor at line capacitance, the negative pole of this electrochemical capacitor and the impedance between shell are less than the impedance between positive pole and shell.
Further, described tested positive and negative polarities and shell at line capacitance all connects signal source.
Compared with prior art; The beneficial effect of the utility model is: realize onlinely electric capacity is carried out accurately polarity detecting, and volume is less, for portable; Can better be applicable to the occasion of various electric capacity polarity checks; Low price can be popularized in big semiworks, conveniently electric capacity polarity on the product is detected; Use three end methods of testing, safe and efficient; Can inform the polarity of user's measured capacitance in real time through voice broadcast function, be user-friendly to; Adopt various test splice, break away from traditional single formula measuring head, accomplish the various test environments of flexible adaptation, hommization more.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the utility model.
Embodiment
Be elaborated with reference to accompanying drawing below in conjunction with embodiment, so that the technical characterictic and the advantage of the utility model are carried out more deep annotation.
The schematic block circuit diagram of the utility model is as shown in Figure 1; A kind of online electric capacity polarity tester; Described tester comprises single-chip microcomputer, the liquid crystal display circuit that is connected with the output terminal of single-chip microcomputer, voice broadcast circuit, signal source; The output terminal of signal source is connected with a tested end at line capacitance, tested input end in the other end connection AD of line capacitance Acquisition Circuit, and the output terminal of AD Acquisition Circuit connects the input end of single-chip microcomputer.
Further, described tester also comprises and is connected with single-chip microcomputer and selects an analog switch by monolithic processor controlled two four.
Further, described tested be electrochemical capacitor at line capacitance, the negative pole of this electrochemical capacitor and the impedance between shell are less than the impedance between positive pole and shell.
Further, described tested positive and negative polarities and shell at line capacitance all connects signal source, adopts a plurality of test splices, broken away from the single formula test splice of prior art, the various test environments of ability flexible adaptation, hommization more.
Further, the voice broadcast circuit is made up of the ISD4004 speech chip, and measurement result is carried out voice broadcast, and the voltage of signal source is 0.25 volt.
The utility model adopts three end methods of testing, and three ends are that online capacitance cathode, negative pole and electric capacity shell utilize negative polarity and the impedance between shell of electrochemical capacitor little more than anodal impedance with shell, and (this electromotive force obtains through the variable resistor dividing potential drop therefore to apply the electric potential difference of 0.25V between by the positive-negative polarity of electric capacity; The electric current that produces is very little; Can not receive that other electronic component disturbs on the primary circuit, can not cause damage, can not injure electric capacity yet) the primary circuit element; It is signal source; And the magnitude of voltage of measurement electric capacity shell, send single-chip microcomputer according to the voltage that records back to through the AD sampling, single-chip microcomputer calculates comparison again; Draw electric capacity and whether instead insert, inform the user through liquid crystal display.
Behind making alive on electric capacity the two poles of the earth, sheath voltage will slowly descend, and will impact when measuring like this; And to use also be inconvenient; For addressing this problem, this product has selected for use one two four to select one analog switch, through Single-chip Controlling; In real time the voltage at line capacitance is switched, guaranteed the accuracy of measuring.
This product uses the ISD4004 speech chip, and measurement result is carried out voice broadcast.
These works will adopt various test splice, break away from traditional single formula measuring head, accomplish the various test environments of flexible adaptation, hommization more.
The content of mentioning in the foregoing description is not to be the qualification to the utility model, and under the prerequisite of the utility model design that does not break away from the utility model, and any conspicuous replacement is all within the protection domain of the utility model.
Claims (4)
1. online electric capacity polarity tester; It is characterized in that: described tester comprises single-chip microcomputer, the liquid crystal display circuit that is connected with the output terminal of single-chip microcomputer, voice broadcast circuit, signal source; The output terminal of signal source is connected with a tested end at line capacitance; Tested input end in the other end connection AD of line capacitance Acquisition Circuit, the output terminal of AD Acquisition Circuit connects the input end of single-chip microcomputer.
2. online electric capacity polarity tester according to claim 1 is characterized in that: described tester also comprises and is connected with single-chip microcomputer and selects an analog switch by monolithic processor controlled two four.
3. online electric capacity polarity tester according to claim 2 is characterized in that: described tested be electrochemical capacitor at line capacitance, the negative pole of this electrochemical capacitor and the impedance between shell are less than the impedance between positive pole and shell.
4. online electric capacity polarity tester according to claim 3 is characterized in that: described tested positive and negative polarities and shell at line capacitance all connects signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220017601XU CN202443090U (en) | 2012-01-16 | 2012-01-16 | Online capacitor polarity tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220017601XU CN202443090U (en) | 2012-01-16 | 2012-01-16 | Online capacitor polarity tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202443090U true CN202443090U (en) | 2012-09-19 |
Family
ID=46824534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220017601XU Expired - Fee Related CN202443090U (en) | 2012-01-16 | 2012-01-16 | Online capacitor polarity tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202443090U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132406A (en) * | 2017-12-13 | 2018-06-08 | 格力电器（武汉）有限公司 | A kind of electron device testing equipment |
| CN108957210A (en) * | 2018-08-10 | 2018-12-07 | 海信（广东）空调有限公司 | Electrolytic capacitor polarity detection circuit and detection device |
| CN109387702A (en) * | 2017-08-04 | 2019-02-26 | 厦门雅迅网络股份有限公司 | A kind of capacitor polarity detection circuit and method |
| CN110988752A (en) * | 2019-12-27 | 2020-04-10 | 常州同惠电子股份有限公司 | Capacitance polarity testing method for wire tester |
-
2012
- 2012-01-16 CN CN201220017601XU patent/CN202443090U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387702A (en) * | 2017-08-04 | 2019-02-26 | 厦门雅迅网络股份有限公司 | A kind of capacitor polarity detection circuit and method |
| CN108132406A (en) * | 2017-12-13 | 2018-06-08 | 格力电器（武汉）有限公司 | A kind of electron device testing equipment |
| CN108957210A (en) * | 2018-08-10 | 2018-12-07 | 海信（广东）空调有限公司 | Electrolytic capacitor polarity detection circuit and detection device |
| CN108957210B (en) * | 2018-08-10 | 2021-01-26 | 海信（广东）空调有限公司 | Electrolytic capacitor polarity detection circuit and detection device |
| CN110988752A (en) * | 2019-12-27 | 2020-04-10 | 常州同惠电子股份有限公司 | Capacitance polarity testing method for wire tester |
| CN110988752B (en) * | 2019-12-27 | 2022-02-08 | 常州同惠电子股份有限公司 | Capacitance polarity testing method for wire tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120919 Termination date: 20130116 |