CN204694803U - A kind of portable circuit trip point pick-up unit - Google Patents
A kind of portable circuit trip point pick-up unit Download PDFInfo
- Publication number
- CN204694803U CN204694803U CN201520450086.8U CN201520450086U CN204694803U CN 204694803 U CN204694803 U CN 204694803U CN 201520450086 U CN201520450086 U CN 201520450086U CN 204694803 U CN204694803 U CN 204694803U
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- effect transistor
- field effect
- trip point
- light emitting
- emitting diode
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Abstract
What a kind of portable circuit trip point pick-up unit of the utility model related to is circuit checker, especially a kind of detecting device that can detect concealed circuit trip point quickly and easily.Comprise housing and controller, controller is arranged in housing, and described controller comprises inductive ac electric signal amplification module and AC signal voltage multiplication light display module; Inductive ac electric signal amplification module is made up of induction metal plate, field effect transistor and resistance; Induction metal plate is connected with the grid of field effect transistor, and the drain electrode of field effect transistor is connected with resistance one end, the source ground of field effect transistor; AC signal voltage multiplication light display module is made up of electric capacity, light emitting diode and crystal diode; Light emitting diode is connected in series with crystal diode, and the negative pole of electric capacity is connected with the negative electrode of light emitting diode, the plus earth of crystal diode; The positive pole of described electric capacity is connected with the drain electrode of field effect transistor, and the other end of resistance is connected with the anode of light emitting diode.
Description
Technical field
What a kind of portable circuit trip point pick-up unit of the utility model related to is circuit checker, especially a kind of detecting device that can detect concealed circuit trip point quickly and easily.
Background technology
The wiring of current indoor electric all adopts buried wirring, sunkens cord into wall, and process is both advantageous and disadvantageous like this, if maximum hidden danger exactly within the walls electric wire there is breakpoint, cause circuit not conducting, cannot normal ON power supply, determine that trip point is very difficult.For because construction time damage cable, electric wire or the cable core broken string etc. that cause because of carelessness, as repaired, will the accurate position of trip point in hidden electrical wire searching, to fix a breakdown in time.Fixing a breakdown is usually work to destroy based on body of wall or monolithic chamber interior decoration, and so-called " open wall and break tripe " formula detection mode is tiring consuming time, and cost is also very high.
Utility model content
The purpose of this utility model provides a kind of portable circuit trip point pick-up unit for above-mentioned weak point, and its cardinal principle is that alternating current can produce alternating electric field around it.
Portable circuit trip point pick-up unit takes following technical scheme to realize:
Portable circuit trip point pick-up unit comprises housing and controller, and controller is arranged in housing, and described controller comprises inductive ac electric signal amplification module and AC signal voltage multiplication light display module;
Inductive ac electric signal amplification module is made up of induction metal plate, field effect transistor and resistance; Induction metal plate is connected with the grid of field effect transistor, and the drain electrode of field effect transistor is connected with resistance one end, the source ground of field effect transistor;
AC signal voltage multiplication light display module is made up of electric capacity, light emitting diode and crystal diode; Light emitting diode is connected in series with crystal diode, and the negative pole of electric capacity is connected with the negative electrode of light emitting diode, the plus earth of crystal diode;
The positive pole of described electric capacity is connected with the drain electrode of field effect transistor, and the other end of resistance is connected with the anode of light emitting diode.
Described controller adopts powered battery, and described battery is dry cell, lithium battery or button cell.
Housing is provided with switch, and the two ends of described switch are connected with the anode of battery and light emitting diode respectively, in order to control the open and close of portable circuit trip point pick-up unit.
Field effect transistor adopts the common junction field effect transistor of 3DJ6 or 3DJ7 type, and its saturated drain current is less than 1mA.
Described light emitting diode adopts the super brightness emitting red light diode of 5mm or 3mm.
Described crystal diode adopts forward conduction voltage to be about the IN4007 crystal diode of 0.6V.
Described resistance adopts RTX-1/8W type carbon film resistor.
Described electric capacity adopts CD11-10V type electrolytic condenser.
When portable circuit trip point pick-up unit is for detecting, hand-held device, and pressed close to wall and move around, when light emitting diode is by when secretly brightening, this device place place is exactly the position of energising concealed wire; As searched disconnection fault position in frid, this device can be pressed close to frid, access location starts to move forward along frid indoor, and when light emitting diode extinguishes suddenly, this moment residing position of this device is exactly broken string place.
Portable circuit trip point pick-up unit is reasonable in design, structure is simple, utilize alternating current can produce the principle of alternating electric field around it, light emitting diode is used to be come out the position of breakage of circuit waypoint and energising concealed wire intuitively, eliminate the trouble of " open wall and break tripe ", trouble spot can be found fast and exactly, for engineering and life bring great convenience, be applicable to very much promoting the use of.
Accompanying drawing explanation
Below with reference to accompanying drawing, the utility model is described further:
Fig. 1 is the circuit theory diagrams of the utility model portable circuit trip point pick-up unit.
In figure: M, induction metal plate, VT, field effect transistor, R, resistance, g, grid, d, drain electrode, s, source electrode, C1, electric capacity, VD1, light-emitting diode pole pipe, VD2 crystal diode, SB, switch, G, power supply.
Embodiment
With reference to accompanying drawing 1, the utility model portable circuit trip point pick-up unit comprises housing and controller, and controller is arranged in housing, and described controller comprises inductive ac electric signal amplification module and AC signal voltage multiplication light display module;
Inductive ac electric signal amplification module is made up of induction metal plate M, field effect transistor VT and resistance R; Induction metal plate M is connected with the grid g of field effect transistor VT, and the drain electrode d of field effect transistor VT is connected with resistance R one end, the source electrode s ground connection of field effect transistor;
AC signal voltage multiplication light display module is made up of electric capacity C, light emitting diode VD1 and crystal diode VD2; Light emitting diode VD1 is connected in series with crystal diode VD2, and the negative pole of electric capacity C is connected with the negative electrode of light emitting diode VD1, the plus earth of crystal diode VD2;
The positive pole of described electric capacity C is connected with the drain electrode d of field effect transistor VT, and the other end of resistance R is connected with the anode of light emitting diode VD1.
Described controller adopts battery G to power, and described battery is dry cell, lithium battery or button cell.
Housing is provided with switch S B, and the two ends of described switch S B are connected with the anode of battery G and light emitting diode VD1 respectively, in order to control the open and close of portable circuit trip point pick-up unit.
When this device uses, first turn on the power switch SB, field effect transistor VT is in zero inclined state, and become conducting state all the time between its drain electrode d and source electrode s, electric capacity C exports without ac signal; Because the forward conduction voltage drop of light emitting diode VD1 is about 1.6V, the forward conduction voltage drop of crystal diode VD2 is about 0.2V, forward conduction voltage drop after light emitting diode VD1 and crystal diode VD2 connects can reach about 1.8V, so the battery G of 1.5V can not directly make light emitting diode VD1 light.
When this pick-up unit is near 220V AC power cord, the induction metal plate M be connected with the grid g of field effect transistor VT will sense faint ac voltage signal, thus make field effect transistor VT1 with the continuous conducting of the frequency of 50Hz and cut-off, electric capacity C is constantly charged by resistance R and crystal diode VD2, constantly discharged by field effect transistor VT, battery G and light emitting diode VD1 again, make light emitting diode VD1 obtain proper operation voltage and luminous, thus judge the position of electric wire.
Claims (9)
1. a portable circuit trip point pick-up unit, it is characterized in that: comprise housing and controller, controller is arranged in housing, and described controller comprises inductive ac electric signal amplification module and AC signal voltage multiplication light display module;
Inductive ac electric signal amplification module is made up of induction metal plate, field effect transistor and resistance; Induction metal plate is connected with the grid of field effect transistor, and the drain electrode of field effect transistor is connected with resistance one end, the source ground of field effect transistor;
AC signal voltage multiplication light display module is made up of electric capacity, light emitting diode and crystal diode; Light emitting diode is connected in series with crystal diode, and the negative pole of electric capacity is connected with the negative electrode of light emitting diode, the plus earth of crystal diode;
The positive pole of described electric capacity is connected with the drain electrode of field effect transistor, and the other end of resistance is connected with the anode of light emitting diode.
2. portable circuit trip point pick-up unit according to claim 1, is characterized in that: described controller adopts powered battery.
3. portable circuit trip point pick-up unit according to claim 2, is characterized in that: described battery is dry cell, lithium battery or button cell.
4. portable circuit trip point pick-up unit according to claim 1, it is characterized in that: on housing, be provided with switch, the two ends of described switch are connected with the anode of battery and light emitting diode respectively.
5. portable circuit trip point pick-up unit according to claim 1, is characterized in that: field effect transistor adopts the common junction field effect transistor of 3DJ6 or 3DJ7 type, and its saturated drain current is less than 1mA.
6. portable circuit trip point pick-up unit according to claim 1, is characterized in that: described light emitting diode adopts the emitting red light diode of 5mm or 3mm.
7. portable circuit trip point pick-up unit according to claim 1, is characterized in that: described crystal diode adopts IN4007 crystal diode.
8. portable circuit trip point pick-up unit according to claim 1, is characterized in that: described resistance adopts RTX-1/8W type carbon film resistor.
9. portable circuit trip point pick-up unit according to claim 1, is characterized in that: described electric capacity adopts CD11-10V type electrolytic condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520450086.8U CN204694803U (en) | 2015-06-29 | 2015-06-29 | A kind of portable circuit trip point pick-up unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520450086.8U CN204694803U (en) | 2015-06-29 | 2015-06-29 | A kind of portable circuit trip point pick-up unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204694803U true CN204694803U (en) | 2015-10-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520450086.8U Expired - Fee Related CN204694803U (en) | 2015-06-29 | 2015-06-29 | A kind of portable circuit trip point pick-up unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204694803U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782944A (en) * | 2017-09-26 | 2018-03-09 | 信利光电股份有限公司 | A kind of universal meter and the device and method of detection circuit open-circuit position |
| CN109541366A (en) * | 2018-11-01 | 2019-03-29 | 深圳市德名利电子有限公司 | A kind of touch screen short circuit test method, touch screen and mobile terminal |
-
2015
- 2015-06-29 CN CN201520450086.8U patent/CN204694803U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782944A (en) * | 2017-09-26 | 2018-03-09 | 信利光电股份有限公司 | A kind of universal meter and the device and method of detection circuit open-circuit position |
| CN109541366A (en) * | 2018-11-01 | 2019-03-29 | 深圳市德名利电子有限公司 | A kind of touch screen short circuit test method, touch screen and mobile terminal |
| CN109541366B (en) * | 2018-11-01 | 2021-11-19 | 深圳市德明利技术股份有限公司 | Touch screen short circuit test method, touch screen and mobile terminal |
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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: 20151007 Termination date: 20200629 |