CN201637775U - Test pencil with self-test function - Google Patents
Test pencil with self-test function Download PDFInfo
- Publication number
- CN201637775U CN201637775U CN2010201700893U CN201020170089U CN201637775U CN 201637775 U CN201637775 U CN 201637775U CN 2010201700893 U CN2010201700893 U CN 2010201700893U CN 201020170089 U CN201020170089 U CN 201020170089U CN 201637775 U CN201637775 U CN 201637775U
- Authority
- CN
- China
- Prior art keywords
- test pencil
- power supply
- coil
- microswitch
- frequency
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model provides a test pencil with a self-test function, comprising a neon bulb D, a current-limiting resistor R2, a handheld end B and a test end A. The test end A is connected with the output end of a small-power high-frequency oscillation booster circuit through a microswitch S1, wherein the small-power high-frequency oscillation booster circuit is powered by a low-voltage direct-current power supply and formed by the following structures: the primary side of a high-frequency transformer T is provided with two coils L1 and L2, the base of a triode Q is connected with a collector through a base resistor R1 and the coil L1, the collector is connected with the positive pole of a low-voltage direct-current power supply V, and the emitter of the triode Q is connected with the negative pole of the low-voltage direct-current power supply V through the coil L2, thus forming a high-frequency oscillation circuit, and one end of a booster coil L3 at the secondary side of the high-frequency transformer T is grounded, and the other end thereof is connected with the test end A of the test pencil by the microswitch S1. A power supply switch S2 and the microswitch S1 which is connected with the test end A are linked switches.
Description
Technical field
The utility model relates to a kind of test pencil with self-checking function, for electrician's test pencil commonly used, is used for detecting at any time the intact of test pencil function, improves electrical safety.
Background technology
We say that usually test pencil is electrician's " half-life ", what use in a large number at present is the traditional test pencil that constitutes with neon bulb and current-limiting resistance, and about the innovation of traditional test pencil concentrate in a large number profile with and as the expansion of instrumental functions such as screwdriver, some are also arranged certainly such as the sound and light alarm test pencil, two-way detects test pencil or the like, though in function and security, increase, but it is the reliability of test pencil as a kind of security tool that above novel test pencil has all been avoided a problem, imagination is if not knowing not have electricity with this judgment device under the situation that test pencil damages, just can produce erroneous judgement.And this erroneous judgement can cause personal injury.
By retrieval, China's the utility model patent " detects sound and light alarm formula low pressure test pencil certainly " and has self-checking function, certainly the detection sound and light alarm formula low pressure test pencil of this utility model adopts a cover sound light alarming circuit in parallel on former common test pencil neon bulb and current-limiting resistance loop, complementary and unlikely be out of order simultaneously and reach passive measuring ability with two loops, can't detect under no clear and definite testing power supply situation, the security of test pencil can't guarantee.
Summary of the invention
The purpose of this utility model is the true environment for use of simulation test pencil, designs a kind of test pencil that can initiatively detect the band self-checking function of test pencil quality at any time.
The technical solution of the utility model: the test pencil of band self-checking function of the present utility model comprises neon bulb D, current-limiting resistance R2, handheld terminal B and electrical verification end A, electrical verification end A is connected with the output terminal of the miniwatt high frequency oscillation step-up circuit of being powered by low-voltage dc power supply by microswitch S1, the miniwatt high frequency oscillation step-up circuit comprises: the former limit of high-frequency transformer T and triode Q and base resistance R1 thereof, low-voltage dc power supply V forms the high-frequency self-excitation oscillatory circuit, the step-up coil one end ground connection of the secondary of high-frequency transformer T, the other end is connected with the electrical verification end A of test pencil by microswitch S1.
The test pencil of described band self-checking function, its miniwatt high frequency oscillation step-up circuit comprises: there are two coil L1, L2 in the former limit of high-frequency transformer T, the base stage of triode Q is connected with collector by base resistance R1, coil L1, and collector is connected with the positive pole of low-voltage dc power supply V; The emitter of triode Q is connected with the negative pole of low-voltage dc power supply V by coil L2, forms the high-frequency self-excitation oscillatory circuit; The step-up coil L3 one end ground connection of the secondary of high-frequency transformer T, the other end is connected with the electrical verification end A of test pencil by microswitch S1.
The test pencil of described band self-checking function has power supply microswitch S2 in the miniwatt high frequency oscillation step-up circuit, power supply microswitch S2 is a linked switch with the microswitch S1 that is connected electrical verification end A.
Described low-voltage dc power supply V is small-sized button cell, voltage 3～6V.
The frequency of described high-frequency self-excitation oscillatory circuit is 16～20KHZ.The step-up coil of the secondary of described high-frequency transformer T is output as 100V-500V, and optimum value is 100V-200V.
Advantage of the present utility model: after incorporating this detection loop on the common test pencil into, can not be subjected to site environment constraint (clearly not detecting power supply) as having, real simulated test pencil environment for use, and directly will detect the high pressure access test pencil detection head that the loop produces, can simply, effectively detect the quality in the examination electricity loop of whole test pencil, make test pencil reliability, security that further raising arranged, there is not electricity so that erroneous judgement is disconnected under the situation that prevents the examination electricity not knowing test pencil to damage, and then the personal injury that causes.How much the utility model finished-product volume, weight can not increase than traditional test pencil.The utility model is a kind of novel test pencil that can simulate the true environment for use of test pencil and active detecting test pencil quality at any time and not be subjected to surrounding enviroment constraints (as clearly not detecting power supply), the reliability, the security that further improve test pencil.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Fig. 1 is circuit theory diagrams of the present utility model: the test pencil of band self-checking function of the present utility model comprises housing etc., and elements such as neon bulb D, current-limiting resistance R2 are installed in the housing after connecting, and two ends are handheld terminal B and electrical verification end A.The electrical verification end A of test pencil is connected with the output terminal of the miniwatt high frequency oscillation step-up circuit of being powered by low-voltage dc power supply by microswitch S1, the miniwatt high frequency oscillation step-up circuit comprises: there are two coil L1, L2 in the former limit of high-frequency transformer T, the base stage of triode Q is connected with collector by base resistance R1, coil L1, and collector is connected with the positive pole of low-voltage dc power supply V; The emitter of triode Q is connected with the negative pole of low-voltage dc power supply V by coil L2, power supply microswitch S2, forms the high-frequency self-excitation oscillatory circuit; The step-up coil L3 one end ground connection of the secondary of high-frequency transformer T, the other end is connected with the electrical verification end A of test pencil by microswitch S1.Power supply microswitch S2 is a linked switch with the microswitch S1 that is connected electrical verification end A, convenient measuring ability and isolation detection loop and the test pencil electrical verification end of using at any time.
Described low-voltage dc power supply V is small-sized button cell, voltage 3～6V.
The frequency of described high-frequency self-excitation oscillatory circuit is 16～20KHZ.
The step-up coil of the secondary of described high-frequency transformer T is output as 100V-500V.The step-up coil of the secondary of high-frequency transformer T is output as 100V-200V the best.
Be electric components commonly used among Fig. 1, it is very little that miniwatt high-frequency transformer volume also can be done, if volume customized only is 10mm * 10mm * 5mm (length * wide * height), other components and parts are with SMD and deposited system pcb board, microswitch has two pairs of nodes, is used for connecting simultaneously testing circuit electric power loop and test pencil electrical verification end during test.Pin the test pencil cap with a hand, the another hand is pressed switch, and the bright proof test pencil of test pencil neon bulb is normal.
Claims (7)
1. test pencil with self-checking function, comprise neon bulb D, current-limiting resistance R2, handheld terminal B and electrical verification end A, it is characterized in that: electrical verification end A is connected with the output terminal of the miniwatt high frequency oscillation step-up circuit of being powered by low-voltage dc power supply by microswitch S1, the miniwatt high frequency oscillation step-up circuit comprises: the former limit of high-frequency transformer T and triode Q and base resistance R1 thereof, low-voltage dc power supply V form the high-frequency self-excitation oscillatory circuit, the step-up coil one end ground connection of the secondary of high-frequency transformer T, the other end is connected with the electrical verification end A of test pencil by microswitch S1.
2. the test pencil of band self-checking function according to claim 1, it is characterized in that: the miniwatt high frequency oscillation step-up circuit comprises: there are two coil L1, L2 in the former limit of high-frequency transformer T, the base stage of triode Q is connected with collector by base resistance R1, coil L1, and collector is connected with the positive pole of low-voltage dc power supply V; The emitter of triode Q is connected with the negative pole of low-voltage dc power supply V by coil L2, forms the high-frequency self-excitation oscillatory circuit; The step-up coil L3 one end ground connection of the secondary of high-frequency transformer T, the other end is connected with the electrical verification end A of test pencil by microswitch S1.
3. the test pencil of band self-checking function according to claim 1 and 2 is characterized in that: power supply microswitch S2 is arranged in the miniwatt high frequency oscillation step-up circuit, and power supply microswitch S2 is a linked switch with the microswitch S1 that is connected electrical verification end A.
4. the test pencil of band self-checking function according to claim 1 and 2 is characterized in that: low-voltage dc power supply V is small-sized button cell, voltage 3～6V.
5. the test pencil of band self-checking function according to claim 1 and 2 is characterized in that: the frequency of high-frequency self-excitation oscillatory circuit is 16～20KHZ.
6. the test pencil of band self-checking function according to claim 1 and 2 is characterized in that: the step-up coil of the secondary of high-frequency transformer T is output as 100V-500V.
7. the test pencil of band self-checking function according to claim 6 is characterized in that: the step-up coil of the secondary of high-frequency transformer T is output as 100V-200V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201700893U CN201637775U (en) | 2010-04-20 | 2010-04-20 | Test pencil with self-test function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201700893U CN201637775U (en) | 2010-04-20 | 2010-04-20 | Test pencil with self-test function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637775U true CN201637775U (en) | 2010-11-17 |
Family
ID=43082279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201700893U Expired - Fee Related CN201637775U (en) | 2010-04-20 | 2010-04-20 | Test pencil with self-test function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133019A1 (en) * | 2016-02-06 | 2017-08-10 | 深圳华盛昌机械实业有限公司 | Inductive test pencil and usage method therefor |
| CN111025114A (en) * | 2019-12-24 | 2020-04-17 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
-
2010
- 2010-04-20 CN CN2010201700893U patent/CN201637775U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017133019A1 (en) * | 2016-02-06 | 2017-08-10 | 深圳华盛昌机械实业有限公司 | Inductive test pencil and usage method therefor |
| CN108603902A (en) * | 2016-02-06 | 2018-09-28 | 深圳华盛昌机械实业有限公司 | Induction type test pencil and application method |
| CN111025114A (en) * | 2019-12-24 | 2020-04-17 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
| CN111025114B (en) * | 2019-12-24 | 2021-10-19 | 福建福顺半导体制造有限公司 | Full-automatic testing arrangement of integrated circuit high frequency electric parameter characteristic |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204856822U (en) | Protection against electric shock warning bracelet | |
| CN101847802B (en) | Electric leakage protection plug | |
| CN103197351A (en) | Human body approaching automatic control device | |
| CN201369470Y (en) | Earth-leakage protecting plug | |
| CN201637775U (en) | Test pencil with self-test function | |
| CN202563077U (en) | Detector for electric energy metering apparatus | |
| CN201207057Y (en) | High-voltage electroscope without dead corner | |
| CN201852876U (en) | Integral lightning protection module with functions of leakage current detection and discharge frequency | |
| CN202305647U (en) | Capacitive type low voltage acousto-optic electricity measurer | |
| CN206531912U (en) | A kind of transformer secondary polarity tester | |
| CN201477175U (en) | Multifunctional test pencil | |
| CN103353566B (en) | Battery for mimic channel equipment testing circuit in place | |
| CN204177906U (en) | Polarity tester | |
| CN201251833Y (en) | Simple earthquake annunciator | |
| CN201078821Y (en) | Power outlet | |
| CN203606486U (en) | Electric energy meter tester and system | |
| CN201994543U (en) | Current terminal short-circuit device | |
| CN102323471A (en) | Induction type high-sensitivity electricity testing device | |
| CN202353176U (en) | Secondary over-voltage protection device for current transformer | |
| CN201682264U (en) | Leakage protector | |
| CN202166664U (en) | High-voltage test warning device | |
| CN206531878U (en) | A kind of circuit power frequency parameter experiment termination | |
| CN208607776U (en) | Portable multi-function earthquake alarm escape auxiliary device | |
| CN203838185U (en) | Auxiliary wiring tool | |
| CN204989444U (en) | Modular measurement is not taken out stitches to line appearance |
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 |
Granted publication date: 20101117 Termination date: 20170420 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |