CN1847862A - Acoustooptically prompting multifunctional test pencil circuit - Google Patents
Acoustooptically prompting multifunctional test pencil circuit Download PDFInfo
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- CN1847862A CN1847862A CN 200610084313 CN200610084313A CN1847862A CN 1847862 A CN1847862 A CN 1847862A CN 200610084313 CN200610084313 CN 200610084313 CN 200610084313 A CN200610084313 A CN 200610084313A CN 1847862 A CN1847862 A CN 1847862A
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- test pencil
- triode
- effect transistor
- field effect
- acoustooptically
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Abstract
The present invention relates to one kind of acousto-optically prompting multifunctional test pencil circuit for electric measuring tool. The test pencil with the circuit can detect AC through direct contact or through an insulating layer and detect the core breaking location of insulated wire. The test pencil circuit includesone AC inducing, amplifying and outputting circuit comprising one FET, one transistor, one LED, one buzzer and one resistor, except one neon tube and one resistor for common test pencil.
Description
The present invention relates to a kind of Acoustooptically prompting multifunctional test pencil circuit, belong to the circuit of electric measurement instrument.
The test pencil circuit of common use is by the series connection of neon tube and resistance, judges by neon tube is whether luminous whether testee has the adventurous alternating current to the people, and must the contact testee.When neon tube damages, cause the disconnected and function singleness of erroneous judgement easily, when needs do not contact testee, see whether testee has alternating current; Or to measure lead across insulation course and whether have alternating current; Maybe will measure the disconnected core position of insulated conductor, common test pencil is just powerless.
The purpose of this invention is to provide a kind of test pencil circuit, the feasible test pencil made from this circuit, can point out simultaneously by acousto-optic on the one hand, diverse in function on the other hand, not only can not contact testee and measure whether have alternating current, and whether have alternating current across insulation course also energy measurement lead, go back the disconnected core position of energy measurement insulated conductor
The object of the present invention is achieved like this: connect one again by a field effect transistor on the basis of common test pencil neon tube and resistance series connection, a triode, a light emitting diode, the alternating current impression amplification output circuit that buzzer and resistance are formed.
Owing to adopt technique scheme, make test pencil both acousto-optic show diverse in function again simultaneously.Safe and reliable, cost is not high yet.
The present invention is further described below in conjunction with accompanying drawing.
Figure of description is circuit theory diagrams of the present invention.
1. measuring heads, 2. neon tubes, 3. current-limiting resistances, 4. field effect transistor pull-up resistors, 5. triode pull-up resistors, 6. light emitting diodes, 7. buzzers, 8. power supplys, 9. microswitches, 10. triodes, 11. repeating resistances, 12. field effect transistor among the figure
In the drawings, measuring head (1). connect the grid of field effect transistor (12) after neon tube (2) and current-limiting resistance (3) series connection, the drain electrode of field effect transistor (12) connects the base stage of triode (10) by repeating resistance (11), the drain electrode of field effect transistor (12) connects the positive pole of power supply (8) by pull-up resistor (4), after linking to each other, the emitter of the source electrode of field effect transistor (12) and triode (10) connects the negative pole of power supply by microswitch (9), the positive pole of one termination light emitting diode (6) of triode pull-up resistor (5), the positive pole of another termination power (8) of triode pull-up resistor (5), the negative pole of light emitting diode connects the collector of triode (10), the collector of one termination triode (10) of buzzer (7), the positive pole of another termination power (8) of buzzer (7).
Circuit of the present invention is to the requirement of each components and parts: measuring head (1), neon tube (2), current-limiting resistance (3) and common test pencil require identical; The resistance of field effect transistor pull-up resistor (4) is about 4.3K, but the working current of resistance root a tree name field effect transistor (12) is suitably adjusted, the requirement source. a little less than 0.7V, the electric current of triode (10) is limited between 15～20mA the voltage between drain electrode when non-inductive signal; The resistance of triode pull-up resistor (5) is about 18 Europe; Light emitting diode (6) is used common red light emitting diodes; Buzzer (7) is used the minisize dc formula; Power supply (8) is used button cell; Microswitch (9) can oneself be made or change a social system with existing microswitch, require button make of metal and and a contact conducting, purpose is when making common test pencil and using, and contacts testee, neon tube (2) is luminous when as if testee alternating current being arranged; Optional 9014 models of triode (10); The resistance of repeating resistance (11) is about 820 Europe; The optional 3DJ6 model of field effect transistor (12).
Make the embodiment of test pencil with circuit of the present invention: shell is made with reference to the production technology of common test pencil shell, the grid that must make field effect transistor (12) during inner the assembling is as far as possible away from other element, because grid is equivalent to an antenna, electric field around being used for responding to, microswitch (9) is placed on the tail end of test pencil body, connect the emitter of triode (10) with the contact of button conducting, measuring head (1) links to each other with neon tube (2), neon tube (2) can be luminous, can play the effect of isolation coupling again, current-limiting resistance (3) links to each other with neon tube (2), other components and parts are placed on appropriate location in the test pencil body, and welding in the circuit board, can see when making work that neon tube (2) and light emitting diode (6) are luminous, hears the sound of buzzer (7).
With the test pencil that circuit of the present invention is made, in use, whether be with alternating current if will measure testee, as long as hand is pressed microswitch (9), during measuring head (1) contact testee, as testee electricity is arranged, neon tube (2) is luminous, light emitting diode (6) is luminous, buzzer (7) sounding, measuring head (1) has as testee when not contacting object, light emitting diode (6) is luminous, buzzer (7) sounding; If will measure the disconnected core position of insulated conductor, earlier pass to the 220V alternating current to insulated conductor, with the close insulated conductor of test pencil, hand is pressed microswitch (9), make light emitting diode (6) luminous, buzzer (7) sounding progressively moves along this line length direction again, find that light emitting diode (6) is unglazed, the noiseless place of buzzer (7) is exactly the disconnected core position of this line.
Claims (4)
1. Acoustooptically prompting multifunctional test pencil circuit, it is to connect one again by a field effect transistor on the basis of common test pencil neon tube and resistance series connection, a triode, a light emitting diode, the alternating current impression amplification output circuit that buzzer and resistance are formed, it is characterized in that: measuring head (1), connect the grid of field effect transistor (12) after neon tube (2) and current-limiting resistance (3) series connection, the drain electrode of field effect transistor (12) connects the base stage of triode (10) by repeating resistance (11), the drain electrode of field effect transistor (12) connects the positive pole of power supply (8) by pull-up resistor (4), after linking to each other, the emitter of the source electrode of field effect transistor (12) and triode (10) connects the negative pole of power supply by microswitch (9), the positive pole of one termination light emitting diode (6) of triode pull-up resistor (5), the positive pole of another termination power (8) of triode pull-up resistor (5), the negative pole of light emitting diode connects the collector of triode (10), the collector of one termination triode (10) of buzzer (7), the positive pole of another termination power (8) of buzzer (7).
2. Acoustooptically prompting multifunctional test pencil circuit according to claim 1 is characterized in that: field effect transistor (12) is better with the 3DJ6 model.
3. Acoustooptically prompting multifunctional test pencil circuit according to claim 1 is characterized in that: triode (10) is better with 9014 models.
4. Acoustooptically prompting multifunctional test pencil circuit according to claim 1 is characterized in that: buzzer (7) is used the minisize dc formula.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610084313 CN1847862A (en) | 2006-05-12 | 2006-05-12 | Acoustooptically prompting multifunctional test pencil circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610084313 CN1847862A (en) | 2006-05-12 | 2006-05-12 | Acoustooptically prompting multifunctional test pencil circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1847862A true CN1847862A (en) | 2006-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610084313 Pending CN1847862A (en) | 2006-05-12 | 2006-05-12 | Acoustooptically prompting multifunctional test pencil circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1847862A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972549A (en) * | 2010-11-10 | 2011-02-16 | 刘喆 | High-sensitivity induction type electricity measurer with strong and weak gears |
| CN102721918A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | High-voltage detection circuit |
| CN103399197A (en) * | 2013-08-28 | 2013-11-20 | 周芸 | Multifunctional test pencil |
-
2006
- 2006-05-12 CN CN 200610084313 patent/CN1847862A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972549A (en) * | 2010-11-10 | 2011-02-16 | 刘喆 | High-sensitivity induction type electricity measurer with strong and weak gears |
| CN102721918A (en) * | 2011-03-29 | 2012-10-10 | 海洋王照明科技股份有限公司 | High-voltage detection circuit |
| CN103399197A (en) * | 2013-08-28 | 2013-11-20 | 周芸 | Multifunctional test pencil |
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| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |