CN202854263U - Simple capacitance electric leakage detector - Google Patents
Simple capacitance electric leakage detector Download PDFInfo
- Publication number
- CN202854263U CN202854263U CN 201220433120 CN201220433120U CN202854263U CN 202854263 U CN202854263 U CN 202854263U CN 201220433120 CN201220433120 CN 201220433120 CN 201220433120 U CN201220433120 U CN 201220433120U CN 202854263 U CN202854263 U CN 202854263U
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- triode
- resistance
- capacitor
- resistor
- electric leakage
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Abstract
Disclosed is a simple capacitance electric leakage detector, comprising a dc source, a voltage comparater, a diode, a first triode, a second triode, a capacitor, a to-be-detected capacitor, a first resistor, a second resistor, a third resistor, a button switch, and a light emitting diode, wherein the capacitor has an additional discharging and externally connected second resistor; and the to-be-detected capacitor is discharged via an internal resistor thereof. If the discharging of the to-be-detected capacitor is faster than the discharging employing the second resistor, the output of the voltage comparater is forced to fall down, thereby lighting the red light emitting diode that indicates the electric leakage of the detected capacitor. The ratio of the simple capacitance electric leakage detector of the utility model is applicable to general testing of all the capacitors including the ceramic capacitor of 1 nanofarad and the electrolytic capacitor of 1000 microfarads. The simple capacitance electric leakage detector of the utility model is capable of testing whether the capacitor has electric leakage or not and determines whether the capacitor is worth using or not. The simple capacitance electric leakage detector inhibits the leakage via the radio of the capacitance to the resistor and saves the overhauling time and manpower.
Description
Technical field
The utility model relates to a kind of pick-up unit of electronic original part, relates in particular to a kind of capacity fall off proving installation.
Background technology
The electrolytic condenser time leaky will occur after long, and this leaky is difficult for being realized that will cause fault such as untimely replacing, even burn out circuit board, the electric capacity in the same circuit is more, detects maintenance and expends many times.
Summary of the invention
The purpose of this utility model provides a kind of easy capacity fall off detector with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises direct supply, voltage comparator, diode, the first triode, the second triode, electric capacity, testing capacitance, the first resistance, the second resistance, the 3rd resistance, pushbutton switch and light emitting diode, described dc power anode simultaneously with the positive pole of described diode, the negative electricity source of described voltage comparator be connected the positive pole of light emitting diode and connect, the negative pole of described diode simultaneously with the emitter of described the first triode be connected the emitter of the second triode and be connected, the collector while of described the first triode and the first end of described electric capacity, the first end of described the second resistance be connected the positive signal input end of voltage comparator and connect, the base stage of described the first triode simultaneously with the first end of described the first resistance be connected the base stage of the second triode and be connected, the second end of described the first resistance is connected with the first end of described pushbutton switch, the second end of described pushbutton switch is connected with the negative pole of described direct supply, the collector of described the second triode simultaneously with the first end of described testing capacitance be connected the negative signal input end of voltage comparator and be connected, the second end while of described electric capacity and the second end of described the second resistance, the second end of described testing capacitance, the cathode power supply input end of described voltage comparator be connected the negative pole of direct supply and connect, the signal output part of described voltage comparator is connected with the first end of described the 3rd resistance, and the second end of described the 3rd resistance is connected with the negative pole of described light emitting diode; Described the first triode and described the second triode are the positive-negative-positive triode.
The beneficial effects of the utility model are:
Ratio of the present utility model is applicable to the universal test from the ceramic capacitor of 1 nanofarad to all capacitors such as electrolytic condenser of 1000 microfarads.Whether the utility model can leak electricity by testing capacitor, and determines whether they are worth using, and leak by the ratio inhibition of electric capacity and resistance, save time and the manpower of maintenance.
Description of drawings
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1: the utility model comprises direct supply, voltage comparator ic, diode VD, the first triode VT1, the second triode VT2, capacitor C, testing capacitance CX, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, pushbutton switch AN and LED, dc power anode simultaneously with the positive pole of diode VD, the negative electricity source of voltage comparator ic is connected positive pole and is connected with LED, the negative pole of diode VD simultaneously with the emitter of the first triode VT1 be connected the emitter of triode VT2 and be connected, the collector while of the first triode VT1 and the first end of capacitor C, the first end of the second resistance R 2 is connected the positive signal input end and is connected with voltage comparator ic, the base stage of the first triode VT1 simultaneously with the first end of the first resistance R 1 be connected the base stage of triode VT2 and be connected, the second end of the first resistance R 1 is connected with the first end of pushbutton switch AN, the second end of pushbutton switch AN is connected with the negative pole of direct supply, the collector of the second triode VT2 simultaneously and the first end of testing capacitance CX be connected the negative signal input end with voltage comparator ic and be connected, the second end while of capacitor C and the second end of the second resistance R 2, the second end of testing capacitance CX, the cathode power supply input end of voltage comparator ic is connected negative pole and is connected with direct supply, the signal output part of voltage comparator ic is connected with the first end of the 3rd resistance R 3, and the second end of the 3rd resistance R 3 is connected with the negative pole of LED; The first triode VT1 and the second triode VT2 are the positive-negative-positive triode.
When pushbutton switch AN closed, capacitor C and testing capacitance CX charged by their triodes separately.When pushbutton switch AN disconnected, capacitor C and testing capacitance CX began discharge.Suppose that capacitor C is in kilter, it has external second resistance R 2 of additional discharge, testing capacitance CX is by its internal resistance discharge, if the discharge of testing capacitance CX is faster by the discharge of the second resistance R 2 than capacitor C, its voltage will descend comparatively fast this moment, and like this, the in the same way end input voltage of voltage comparator ic will be lower than its backward end input voltage, force the output step-down of voltage comparator ic, thereby light red light emitting diodes LED.This light emitting diode indicates testing capacitance CX electric leakage, and this test circuit shows even the ceramic capacitor of 1 nanofarad all adapts to liken to reference, please check before the test that the nominal voltage of testing capacitance CX should be higher than its voltage to be charged.
Claims (2)
1. easy capacity fall off detector, it is characterized in that: comprise direct supply, voltage comparator, diode, the first triode, the second triode, electric capacity, testing capacitance, the first resistance, the second resistance, the 3rd resistance, pushbutton switch and light emitting diode, described dc power anode simultaneously with the positive pole of described diode, the negative electricity source of described voltage comparator be connected the positive pole of light emitting diode and connect, the negative pole of described diode simultaneously with the emitter of described the first triode be connected the emitter of the second triode and be connected, the collector while of described the first triode and the first end of described electric capacity, the first end of described the second resistance be connected the positive signal input end of voltage comparator and connect, the base stage of described the first triode simultaneously with the first end of described the first resistance be connected the base stage of the second triode and be connected, the second end of described the first resistance is connected with the first end of described pushbutton switch, the second end of described pushbutton switch is connected with the negative pole of described direct supply, the collector of described the second triode simultaneously with the first end of described testing capacitance be connected the negative signal input end of voltage comparator and be connected, the second end while of described electric capacity and the second end of described the second resistance, the second end of described testing capacitance, the cathode power supply input end of described voltage comparator be connected the negative pole of direct supply and connect, the signal output part of described voltage comparator is connected with the first end of described the 3rd resistance, and the second end of described the 3rd resistance is connected with the negative pole of described light emitting diode.
2. easy capacity fall off detector according to claim 1, it is characterized in that: described the first triode and described the second triode are the positive-negative-positive triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220433120 CN202854263U (en) | 2012-08-29 | 2012-08-29 | Simple capacitance electric leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220433120 CN202854263U (en) | 2012-08-29 | 2012-08-29 | Simple capacitance electric leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202854263U true CN202854263U (en) | 2013-04-03 |
Family
ID=47985446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220433120 Expired - Fee Related CN202854263U (en) | 2012-08-29 | 2012-08-29 | Simple capacitance electric leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202854263U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387768A (en) * | 2017-08-03 | 2019-02-26 | 新唐科技股份有限公司 | Test system and test method of reference voltage circuit |
| CN110632442A (en) * | 2019-10-10 | 2019-12-31 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN116540148A (en) * | 2023-07-06 | 2023-08-04 | 江苏展芯半导体技术有限公司 | Leakage test circuit of TBU device under high pressure |
-
2012
- 2012-08-29 CN CN 201220433120 patent/CN202854263U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387768A (en) * | 2017-08-03 | 2019-02-26 | 新唐科技股份有限公司 | Test system and test method of reference voltage circuit |
| CN109387768B (en) * | 2017-08-03 | 2021-02-12 | 新唐科技股份有限公司 | Test system and test method of reference voltage circuit |
| CN110632442A (en) * | 2019-10-10 | 2019-12-31 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN110632442B (en) * | 2019-10-10 | 2021-11-23 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN116540148A (en) * | 2023-07-06 | 2023-08-04 | 江苏展芯半导体技术有限公司 | Leakage test circuit of TBU device under high pressure |
| CN116540148B (en) * | 2023-07-06 | 2023-09-05 | 江苏展芯半导体技术有限公司 | Leakage test circuit of TBU device under high pressure |
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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: 20130403 Termination date: 20130829 |