CN201229379Y - Induction electroscope - Google Patents
Induction electroscope Download PDFInfo
- Publication number
- CN201229379Y CN201229379Y CNU2008200234377U CN200820023437U CN201229379Y CN 201229379 Y CN201229379 Y CN 201229379Y CN U2008200234377 U CNU2008200234377 U CN U2008200234377U CN 200820023437 U CN200820023437 U CN 200820023437U CN 201229379 Y CN201229379 Y CN 201229379Y
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- induction
- triode
- amplifying circuit
- final stage
- power supply
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Abstract
The utility model discloses an inductive electricity testing tester, which comprises an insulating shell and an inductive probe. The inductive electricity testing tester is characterized in that an inductive amplifying circuit, a luminescent diode and a power supply are arranged in the insulating shell, one end portion of the inductive probe is connected with an input end of the inductive amplifying circuit and provides inductive triggering current, the power supply provides working voltage for the inductive amplifying circuit, the luminescent diode is connected between the power supply and an amplifying output end of a final stage driving tube of the inductive amplifying circuit in series, the connection and disconnection of the driving tube control the connection and disconnection of a working loop between the luminescent diode and the power supply, a normally-open inching switch is connected between the amplifying output end of the driving tube and a power supply negative electrode, and a contact electrode is also respectively connected with a normally-open end of the inching switch. The inductive electricity testing tester can judge whether tested bodies are charged or not without contacting with the tested bodies, the arrangement of the inching switch and the contact electrode not only can be used in illumination, but also can measure the connection and disconnection of tested cables, the inductive electricity testing tester is practical and convenient, used components are few, and the product cost is low.
Description
Technical field
The utility model relates to a kind of electroscopic device, and especially a kind of instructed voltage that is used for exists, discerns the cable through and off and integrates the induction electrical verification tester that throws light on.
Background technology
At present, known test pencil is to be connected in series by test contact, current-limiting resistance, neon tube, metal spring and hand touched electrode.Test contact is contacted with measured object, staff contact hand touched electrode, when measured object has high voltage relative to the earth, the neon tube build-up of luminance, the expression measured object is charged.But joint, the contact of a lot of cables are very hidden, and test contact is not easy to be in contact with it, and the tentacle touched electrode that must catch in addition just can be carried out electrical verification, and be extremely inconvenient.When the detection cable opens circuit, do not use auxiliary multimeter to be difficult to find its trip point if only adopt existing test pencil, and when using multimeter to search the cable trip point, destroy cable appearance insulation course, there is the deficiency of troublesome poeration.
Summary of the invention
In order to overcome the deficiency that existing test pencil only has single test voltage function, electrical verification inconvenient operation and can't detect the cable trip point, the utility model provides a kind of induction electrical verification tester.Whether this induction electrical verification tester is not only simple in structure, convenient and practical, and need not contact testee and just can measure chargedly, and can find out the accurate position that cable opens circuit and locates easily, and integrate illumination functions.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of induction electrical verification tester, comprise insulation shell and inducing probes, inducing probes is assemblied on the insulation shell, one end stretches out outside the housing, the other end is positioned at housing, characteristics are also to be provided with the induction amplifying circuit in insulation shell, light emitting diode and power supply, the described inducing probes end that is positioned at housing is connected with the input end of induction amplifying circuit, for providing induction, the induction amplifying circuit triggers working current, described power supply provides operating voltage for the induction amplifying circuit, the final stage driving tube that described light emitting diode forward is serially connected in power supply and induction amplifying circuit amplifies between the output terminal, the on-off in the conducting of the final stage driving tube of this induction amplifying circuit or the loop of between control light emitting diode and power supply, working, between the final stage driving tube of described induction amplifying circuit amplifies output terminal and power cathode, be connected in series a microswitch of often opening, on two Chang Kaiduan of this microswitch, also connect one respectively and touch the utmost point.
Described induction amplifying circuit drives triode by two compound amplifying triodes and a final stage and forms, the input end of the described induction amplifying circuit that is connected with inducing probes one end is the base stage of an elementary amplifying triode, the emitter of this elementary amplifying triode is connected with the base stage of secondary amplifying triode, the emitter of secondary amplifying triode is connected with the base stage that described final stage drives triode, the described power supply that operating voltage is provided for the induction amplifying circuit, its positive source respectively with elementary amplifying triode, the collector of secondary amplifying triode is connected, power cathode is connected with the emitter that final stage drives triode, the amplification output terminal of described final stage driving tube is the collector of this final stage driving tube, the final stage driving tube that described forward is serially connected in power supply and induction amplifying circuit amplifies the light emitting diode between the output terminal, the positive pole of this light emitting diode is connected with positive source, and the negative pole of light emitting diode is connected with the collector of final stage driving tube.
Between the base stage of the described final stage amplification driving triode that is connected with the emitter of secondary amplifying triode a third gear sensitivity selecting switch is set also, the common port of this sensitivity selecting switch is connected with the emitter of secondary amplifying triode, drive three shunt resistances of serial connection between the base stage, emitter of triode in final stage, one selecting side of described sensitivity selecting switch directly is connected with the base stage that final stage drives triode, and other two selecting sides are connected on the serial connection point of resistance in twos.
Described for induction amplifying circuit pipe provides the power supply of operating voltage, its voltage is 3.6-4.5v.
Whether the compound transistor of the utility model utilization induction amplifying circuit amplifies the induction current that inducing probes receives, and promotes the driving triode conducting of light emitting diode, makes light emitting diode and power supply formation loop and luminous, charged to judge measured object; Press microswitch, make light emitting diode and power supply constitute the loop and luminous, be used for illumination; Not charged at measured object, can touch the utmost point by two contacts and contact, and constitute the loop with light emitting diode and power supply with cable, observe lumination of light emitting diode and whether judge the cable on-off.The utility model can also be controlled the luminosity of light emitting diode by the base current size that selector switch is used for the controlling and driving triode, with the power of judging that tested electrified body is charged.
The beneficial effects of the utility model are: do not need directly to contact with measured body and just can judge that whether it has dangerous electricity, does not have human electric shock's danger.Add branch road and microswitch, both can be used for illumination, can measure tested cable through and off again, practical and convenient, simple in structure, used element is few, and cost of products is low.
Description of drawings
Below in conjunction with accompanying drawing and example the utility model is further specified.
Fig. 1 is this practical structure cut-open view.
Fig. 2 is circuit theory diagrams of the present utility model.
1. inducing probes among the figure, 2. selector switch, 3. microswitch, 4. superbright light emitting diode, 5,6. contact point, 7. battery, 8. insulation crust, 9. final stage is amplified and is driven triode, 10. elementary amplifying triode, 11. level amplifying triodes, 12. shunt resistances, 13. sensor circuits.
Embodiment
Fig. 1 has provided the structural representation of a kind of embodiment of the present utility model.In Fig. 1, a kind of induction electrical verification tester comprises insulation shell 8 and inducing probes 1, and inducing probes 1 is assemblied on the insulation shell 8, and an end stretches out outside the housing, and the other end is positioned at housing.
In insulation shell 8, also be provided with induction amplifying circuit 11, light emitting diode 4 and power supply 7.
The end that is positioned at the inducing probes 1 of housing is connected with the input end of induction amplifying circuit 13, for induction amplifying circuit 13 provides the induction trigger current.
Power supply 7 provides operating voltage for induction amplifying circuit 13.
The final stage driving tube 9 that light emitting diode 4 forwards are serially connected in power supply 7 and induction amplifying circuit 13 amplifies between the output terminals, and the conducting of the final stage driving tube 9 of this induction amplifying circuit 13 makes formation work loop between light emitting diode 4 and the power supply 7 and luminous.
Among Fig. 1, between the final stage driving tube 9 of induction amplifying circuit 13 amplifies output terminals and power cathode, be connected in series a microswitch of often opening 3, on two Chang Kaiduan of this microswitch 3, also connect one respectively and touch the utmost point 5,6.
Wherein light emitting diode 4, microswitch 3, touch the utmost point 5,6 and be inlaid in respectively on the end panel of insulation shell 8.
Fig. 2 is the physical circuit schematic diagram that provides according to the structure among Fig. 1.In Fig. 2, induction amplifying circuit 13 drives triode 9 by two compound amplifying triodes 10,11 and a final stage and forms.
As shown in Figure 2, one end of inducing probes 1 is connected with the base stage of the elementary amplifying triode 10 of induction amplifying circuit 13, the emitter of elementary amplifying triode 10 is connected with the base stage of secondary amplifying triode 11, and the emitter of secondary amplifying triode 11 is connected with the base stage that final stage drives triode 9.
Power supply 7 provides operating voltage for induction amplifying circuit 13, and this power source voltage is 3.6-4.5v.As shown in Figure 2, the positive pole of power supply 7 is connected with the collector of elementary amplifying triode 10, secondary amplifying triode 11 respectively, and the negative pole of power supply 7 is connected with the emitter that final stage drives triode 9.
A kind of equivalent technologies in addition is: the positive pole of light emitting diode 4 can be to be connected with the emitter of final stage amplification driving tube 9, and the negative pole of light emitting diode 4 is connected with the negative pole of power supply 7, and the positive pole of power supply 7 is connected with the collector of final stage driving tube 9.(not providing among the figure)
In Fig. 2, amplify a microswitch of often opening 3 also in parallel respectively on the collector, emitter of driving tube 9 in final stage.Also connect one respectively on two Chang Kaiduan of microswitch 3 and touch the utmost point 5,6 just joining on collector, the emitter in addition.
In order clearly to judge the power of testee surrounding magnetic field, between the base stage that the emitter and the final stage of secondary amplifying triode 11 drives triode 9, a sensitivity selecting switch 2 is set also.This sensitivity selecting switch 2 is third gear sensitivity selecting switch, the common port of sensitivity selecting switch 2 is connected with the emitter of secondary amplifying triode 11, amplify to drive three shunt resistances 12 of serial connection between the base stage, emitter of triode 9 in final stage, one selecting side of sensitivity selecting switch 2 directly is connected with the base stage of final stage driving triode 9, and other two selecting sides are connected on the serial connection point of resistance in twos.Adjust induction sensitivity by this sensitivity selecting switch 2, thereby judge the power that testee is whether charged and charged easily.
During the induction electrical verification, microswitch 3 is in normally open, and inducing probes 1 is near measured object.If measured object is charged, induction current appears on the inducing probes 1, promoting elementary amplifying triode 10,11 conductings of secondary amplifying triode carries out electric current and amplifies, the electric current that is exaggerated is controlled the size that final stage drives triode 9 base currents by sensitivity selecting switch 2 and shunt resistance 12, thereby the size of the collector current of controlling and driving pipe 9, promote the conducting that final stage drives triode 9, make light emitting diode 4 luminous with power supply 7 formation loops.If it is not charged on the testee, non-inductive electric current on the inducing probes 1, elementary amplifying triode 10, secondary amplifying triode, final stage controlling and driving triode 9 are in cut-off state, and light emitting diode 4 can not constitute the work loop with power supply 7, and then light emitting diode 4 is not luminous.
When measured object is cable, this cable is under uncharged state, microswitch 3 is in normally open, tested electric wire or cable 2 are connected to respectively touch on the utmost point 5,6, then power supply 7, light emitting diode 4, cable constitute the loop, and this moment, light emitting diode 4 was not luminous when as if cable fracture being arranged, otherwise light emitting diode 4 is luminous, thereby clearly judges the switching situation of cable.Cable then can utilize the postpone extexine of cable of inductive probe 1 under charged state, receive induction current, by observing the luminous situation of light emitting diode 4, does not need to destroy cable appearance insulation course, just can judge the cable trip point easily.
When the utility model induction electrical verification tester uses as illumination, only need microswitch 3 is pressed, power supply 7, light emitting diode 4, microswitch 3 promptly constitute the work loop, and light emitting diode 4 is luminous to be used for illumination.
Need to prove that the compound amplifying triode in the utility model induction amplifying circuit can be that two triode serial connections form, and also can use Darlington transistor.Driving tube can be a triode, also can adopt field effect transistor or controllable silicon.
Claims (4)
1, a kind of induction electrical verification tester, comprise insulation shell and inducing probes, inducing probes is assemblied on the insulation shell, one end stretches out outside the housing, the other end is positioned at housing, it is characterized in that: in insulation shell, also be provided with the induction amplifying circuit, light emitting diode and power supply, the described inducing probes end that is positioned at housing is connected with the input end of induction amplifying circuit, for providing induction, the induction amplifying circuit triggers working current, described power supply provides operating voltage for the induction amplifying circuit, the final stage driving tube that described light emitting diode forward is serially connected in power supply and induction amplifying circuit amplifies between the output terminal, the on-off in the conducting of the final stage driving tube of this induction amplifying circuit or the loop of between control light emitting diode and power supply, working, between the final stage driving tube of described induction amplifying circuit amplifies output terminal and power cathode, be connected in series a microswitch of often opening, on two Chang Kaiduan of this microswitch, also connect one respectively and touch the utmost point.
2, a kind of induction electrical verification tester according to claim 1, it is characterized in that: described induction amplifying circuit drives triode by two compound amplifying triodes and a final stage and forms, the input end of the described induction amplifying circuit that is connected with inducing probes one end is the base stage of an elementary amplifying triode, the emitter of this elementary amplifying triode is connected with the base stage of secondary amplifying triode, the emitter of secondary amplifying triode is connected with the base stage that described final stage drives triode, the described power supply that operating voltage is provided for the induction amplifying circuit, its positive source respectively with elementary amplifying triode, the collector of secondary amplifying triode is connected, power cathode amplifies the emitter that drives triode with final stage and is connected, the amplification output terminal of described final stage driving tube is the collector of this final stage driving tube, the final stage driving tube that described forward is serially connected in power supply and induction amplifying circuit amplifies the light emitting diode between the output terminal, the positive pole of this light emitting diode is connected with positive source, and the negative pole of light emitting diode is connected with the collector of final stage driving tube.
3, a kind of induction electrical verification tester according to claim 2, it is characterized in that: between the base stage of the described final stage driving triode that is connected with the emitter of secondary amplifying triode a third gear sensitivity selecting switch is set also, the common port of this sensitivity selecting switch is connected with the emitter of secondary amplifying triode, drive the base stage of triode in final stage, three shunt resistances of serial connection between the emitter, one selecting side of described sensitivity selecting switch directly is connected with the base stage that final stage drives triode, and other two selecting sides are connected on the serial connection point of resistance in twos.
4, according to claim 1 or 2 or 3 described a kind of induction electrical verification testers, it is characterized in that: described for the induction amplifying circuit provides the power supply of operating voltage, its voltage is 3.6-4.5v.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200234377U CN201229379Y (en) | 2008-05-30 | 2008-05-30 | Induction electroscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200234377U CN201229379Y (en) | 2008-05-30 | 2008-05-30 | Induction electroscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201229379Y true CN201229379Y (en) | 2009-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200234377U Expired - Fee Related CN201229379Y (en) | 2008-05-30 | 2008-05-30 | Induction electroscope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201229379Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001096A (en) * | 2012-08-22 | 2013-03-27 | 苏州久三智能科技有限公司 | Wire sensing device |
| CN103364675A (en) * | 2012-03-30 | 2013-10-23 | 海洋王（东莞）照明科技有限公司 | Wire disconnection detecting circuit and wire disconnection detecting device |
-
2008
- 2008-05-30 CN CNU2008200234377U patent/CN201229379Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364675A (en) * | 2012-03-30 | 2013-10-23 | 海洋王（东莞）照明科技有限公司 | Wire disconnection detecting circuit and wire disconnection detecting device |
| CN103001096A (en) * | 2012-08-22 | 2013-03-27 | 苏州久三智能科技有限公司 | Wire sensing device |
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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: 20090429 Termination date: 20110530 |