CN2752778Y - Self-detecting acousto-optic alarming low-voltage electroprobe - Google Patents
Self-detecting acousto-optic alarming low-voltage electroprobe Download PDFInfo
- Publication number
- CN2752778Y CN2752778Y CN 200420116162 CN200420116162U CN2752778Y CN 2752778 Y CN2752778 Y CN 2752778Y CN 200420116162 CN200420116162 CN 200420116162 CN 200420116162 U CN200420116162 U CN 200420116162U CN 2752778 Y CN2752778 Y CN 2752778Y
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- 238000012360 testing method Methods 0.000 claims abstract description 89
- 229910052754 neon Inorganic materials 0.000 claims abstract description 24
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000009413 insulation Methods 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 abstract description 11
- 230000002950 deficient Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 240000007320 Pinus strobus Species 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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Abstract
The utility model discloses a structure of a self-detecting acoustic-optic alarming low-voltage test pencil. An acoustic-optic alarming branch circuit is connected in parallel to a circuit of the existing neon bulb test pencil, and is orderly and electrically connected with a trigger tube, a current limiting resistor, a bridge rectifier circuit and a second hand touch electrode, wherein three-stage amplifying circuits are connected to both ends of the bridge rectifier circuit, and a luminous element is connected between a two-stage amplifier and a power supply; a buzzer is connected between a third-stage amplifier and the power supply. The test pencil of the utility model overcomes the shortages of the existing test pencil, the acoustic-optic alarming display of the utility model adopts an LED and the buzzer, and the display of tested signals is obvious and powerful; the utility model has the functions of faradism test, low-voltage test (20-60V), high-voltage test (60-500V), neon bulb test and self test and is not easy to constrain by an environment, and the utility model is the ideal test pencil used during electricity test.
Description
Technical field
The utility model relates to a kind of test pencil, it is improved on the basis that keeps traditional test pencil function, mainly be to adopt light emitting diode and hummer, particularly provide a kind of and overlap non-interfering testing circuits and can directly apply to low voltage experiment and the novel pencil test structure of induced electricity test with self-checking function, two as alarm element.
Background technology
At present, known test pencil structure normally is in series by test contact, current-limiting resistance, neon tube, metal spring and first-hand touched electrode.During use, be that test contact is directly contacted with measured object, staff contact hand touched electrode, when measured object has high voltage relative to the earth, the neon tube starter, the expression measured object is charged.
Yet the defective of existing single neon tube formula test pencil is as follows:
1, can not determine in the course of the work whether test pencil itself is normal, damages that neon tube does not work, and just can't determine whether circuit is charged, is live wire, or zero line as test pencil itself.This just impels many electricians emitting life danger, goes to survey with finger; Perhaps cause misjudgment.
2, the test pencil neon tube is luminous not obvious, and (when being 60V-100V as the neon tube both end voltage, having only faint ruddiness) shows still for not obvious when measuring low-voltage, do not have the warning effect.
3, when the neon tube two ends when 60V is following during voltage, neon tube is not luminous, test pencil also just can not be tested dangerous voltage, and very big limitation is arranged.
4, the luminous demonstration of neon tube is subjected to outdoorly to disturb than the high light line, is difficult to judge whether neon tube luminous during test under outdoor high light most, can not determine whether measured object charged, as the power circuit workman for a long time at outside work.
Another kind of test pencil also is provided in the prior art, it has liquid crystal digital and shows and neon tube demonstration composition one, its structure is a liquid crystal display circuit in parallel on common neon tube formula test pencil basis, can measure the function of dangerous voltage and display voltage numerical value and induced electricity test.
Yet in use still there are some defectives in this test pencil:
1, mainly still with the element of neon tube as the demonstration dangerous voltage, the defective that neon tube is used in test pencil as mentioned above for this electroprobe.
2, the long-term proof that gets of using through market, liquid crystal digital show very easily to be damaged, and digital display error is too big, is unsuitable for the electrical equipment workmen and uses for a long time.
3, can not determine in the course of the work whether test pencil itself is normal, use the dangerous erroneous judgement that also causes easily.
Except above-mentioned two kinds of test pencils, a kind of test pencil further is provided in the prior art, it adopts light emitting diode as display element, its structure is to be in series by test contact, current-limiting resistance, triode, battery, light emitting diode, metal spring and hand touched electrode, and whether can detect test pencil intact.During use, be that test contact is directly contacted with measured object, staff contact hand touched electrode, when measured object has certain voltage relative to the earth, lumination of light emitting diode, the expression measured object has the voltage of certain electricity.Induced electricity when test, with test contact directly with the measured object insulating surface on when contacting, staff contact hand touched electrode, when measured object had certain voltage relative to the earth, lumination of light emitting diode represented that measured object has the voltage of certain electricity.
Yet, this single employing light emitting diode is as the also concrete certain defective of display element test pencil: retrained by geographical environment, there is not obvious differentiation dangerous voltage in most of occasions during test, as on geology ground or during bigger indoor of humidity directly during test, the live wire of test and zero line all allow light emitting diode all send almost with the bright red of brightness, can't distinguish live wire and zero line.
The utility model content
At said circumstances, the purpose of this utility model is to provide a kind of and overlaps non-interfering testing circuits and can directly apply to low voltage experiment and the novel pencil test structure of induced electricity test with self-checking function, two, mainly be that employing light emitting diode and hummer are alarm element, to solve the problems that above-mentioned existing test pencil exists.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of in insulation crust, test contact, current-limiting resistance, neon bulb and first-hand touched electrode are electrically connected in proper order from detecting sound and light alarm formula low pressure test pencil, and its emphasis improves and is:
Described circuit also is parallel with a sound and light alarm branch road, and this branch road is to be electrically connected in proper order by trigger tube, current-limiting resistance, bridge rectifier circuit and second-hand's touched electrode; Wherein, the two ends of this bridge rectifier circuit are connected with three-stage amplifier, are connected with light-emitting component between two-stage amplifier and power supply; Between third stage amplifier and power supply, be connected with hummer.
More specifically be, described three-stage amplifier more specifically is meant the common emitter three-stage amplifier, and wherein the two ends of this light-emitting component are connected with collector, the power supply of two-stage amplifier respectively; The two ends of this hummer are connected with collector, the power supply of third stage amplifier respectively.
In described insulation crust, be provided with test button.
Described light-emitting component is a light emitting diode.
Described sounding component is a hummer.
The two ends of described bridge rectifier circuit also are connected with filter capacitor.
Because the utility model has adopted said structure, makes it have more following plurality of advantages than known technology:
1, this novel test pencil has two cover testing circuits, and a cover is common neon bulb (standby), and a cover is sound and light alarm (using always), and promptly an electroprobe is when two uses; And self-checking system, can carry out self check whenever and wherever possible, determine whether electroprobe itself is normal;
2, this novel electroprobe test specification is extensive, and when directly testing the voltage below the 60V-20V, light emitting diode sends tangible ruddiness, this moment, hummer did not ring, when tested voltage surpassed 60V voltage, not only light emitting diode can send tangible ruddiness and reports to the police, hummer also together with the time report to the police; Acousto-optic is reported to the police simultaneously and is impelled people to enhance your vigilance; And the highest test voltage is 500V.
3, this novel electroprobe can Validity Test, determines live wire or zero line by sound and light alarm.
Description of drawings
Fig. 1 is the one-piece construction signal of the utility model test pencil;
Fig. 2 is the circuit diagram of the utility model test pencil.
[figure number explanation]
1 test contact, 7 batteries
2 protection against electric shock gum covers, 8 second-hand's touched electrode
3 neon bulbs, 9 test button
4 convex transparent adhesive tapes, 10 first-hand touched electrode
5 light emitting diodes, 11 circuit boards
6 hummers, 12 opaque plastic cement
Embodiment
For the clear structure of the present utility model of your auditor is formed, conjunction with figs. is described as follows now:
The utility model embodiment is a kind of from detecting sound and light alarm formula low pressure test pencil, its one-piece construction as shown in Figure 1, it includes test contact 1, protection against electric shock gum cover 2, neon bulb 3, convex transparent adhesive tape 4, light emitting diode 5, hummer 6, battery 7, first-hand touched electrode 10, second-hand's touched electrode 8, test button 9 and circuit board 11 and opaque plastic cement.
Its internal circuit as shown in Figure 2, it is to improve on the architecture basics of existing neon bulb test pencil, promptly be parallel with a sound and light alarm branch road in original circuit again, this branch road specifically is to be electrically connected by trigger tube DB3, current-limiting resistance R4, bridge rectifier circuit and second-hand's touched electrode 8 orders; Wherein, the two ends of this bridge rectifier circuit are connected with common emitter three-stage amplifier (GB1, GB2, GB3), are connected with LED between the collector of two-stage amplifier GB2 and power supply; Between the collector of third stage amplifier GB3 and power supply, be connected with hummer FM.Be provided with test button in described insulation crust, the two ends of bridge rectifier circuit also are connected with filter capacitor C1.
Below, in conjunction with circuit shown in Figure 2, specify the principle of work of present embodiment test pencil:
One, self-monitoring principle of work:
When detecting the button closure certainly, the inclined to one side value resistance R 2 of positive source warp flows to the base stage of GB1, because of GB1 has had base current, impels GB1 to start working; The emitter current of GB1 flows to the base stage of GB2, because of GB2 has had base current, impels GB2 to start working, and there has been 1.5V voltage at the load LED two ends on the GB2 collector, and LED begins luminous, and electric current is the 7-10 milliampere; The GB2 emitter current flows to the base stage of GB3 simultaneously, because of GB3 has had base current, impels GB3 to start working, and there has been 2V voltage at the load hummer FM two ends on the GB3 collector, and FM begins to sound a buzzer, and electric current is 20 milliamperes.This is sound and light alarm from detecting.
Two, induced electricity test philosophy:
When the outside surface of examination contact at tested thing, the induced electricity of tested thing and distributed capacitance produce electromotive force on the examination contact, flow to current-limiting resistance R4 by electric capacity between the DB3 knot, and the positive electrical that flows out through bridge rectifier flows to the base stage of GB1 again, because of GB1 has had base current, GB1 starts working; The emitter current of GB1 flows to the base stage of GB2, and GB2 starts working, and there has been 1.5V voltage at the load LED two ends on the GB2 collector, and LED begins luminous, and electric current is the 7-10 milliampere; This moment is too small (too little because of trying the dateline induction electromotive force because of the base current of GB3, electric current after amplify at GB1, GB2 the two poles of the earth is lower than GB3 base stage working current), GB3 can't work, load FM on the GB3 collector does not work, and electric current flows in the first-hand touched electrode of test pencil to human body to the earth by shunt resistance R3.At this moment have only LED luminous, thereby realized the induced electricity test.
Direct test process when three, electrified body voltage is the voltage of 20V-60V:
When the situation of brownout, directly directly test with tested thing.When the contact of examination contact was on tested thing, the summary electric current of tested thing flowed to current-limiting resistance R4 by electric capacity between the DB3 knot, and the positive electrical that flows out through bridge rectifier flows to the base stage of GB1 again, and GB1 has base current, starts working; The emitter current of GB1 flows to the base stage of GB2, and GB2 starts working, and there has been 1.5V voltage at the load LED two ends on the GB2 collector, and LED is luminous; This moment is too small because of the base current of GB3, and GB3 can't work, and the load FM on the GB3 collector does not work, and electric current flows in the first-hand touched electrode of test pencil to human body to the earth by shunt resistance R3.At this moment have only LED luminous, thus the direct test when realizing that voltage is 20V-60V.
Four, the direct test process of the above voltage of 60V:
When the examination contact was in direct contact with on the measured object that voltage is the above voltage of 60V, DB3 was a conducting state, and the positive electrical that electric current flows out through the current-limiting resistance bridge rectifier flows to the base stage of GB1, and C1 electric capacity strobes, and GB1 has base current, starts working; The emitter current of GB1 flows to the base stage of GB2, and GB2 starts working, and there has been 1.5V voltage at the load LED two ends on the GB2 collector, and LED begins luminous; The GB2 emitter current flows to the base stage of GB3 simultaneously, and because of GB3 has had base current, GB3 starts working, and there has been 2V voltage at the load FM two ends on the GB3 collector, and FM begins to sound a buzzer.Sound and light alarm when this is direct detection.
The utility model test pencil adopts the novel electronic technical design, overcome the shortcoming of common neon bulb test pencil, sound and light alarm shows employing LED and hummer, the signal that tests out shows obvious, powerful, integrate induced electricity test, low voltage test (20-60V), high voltage test (60-500V), neon bulb test, and have self-checking function, be not subject to environmental constraints, the desirable test pencil that uses when being a kind of suitable electrical verification.
In sum; the utility model is from application target; on the usefulness; viewpoint such as progressive and novelty is set forth; the practical improvement that it has; function enhancement and use important document that Patent Law is emphasized have been met; explanation and accompanying drawing that the utility model is above; it only is preferred embodiment of the present utility model; be not to limit to the utility model with this; therefore; all all and the utility model structures; device; features etc. are approximate; duplicate; be allly to replace or modification etc. according to the utility model patent claim being equal to of doing, all should still belong within the scope of patented claim protection of the present utility model.
Claims (5)
1, a kind of from detecting sound and light alarm formula low pressure test pencil, in insulation crust, test contact, current-limiting resistance, neon bulb and first-hand touched electrode are electrically connected in proper order, it is characterized in that: described circuit also is parallel with a sound and light alarm branch road, and this branch road is to be electrically connected in proper order by trigger tube, current-limiting resistance, bridge rectifier circuit and second-hand's touched electrode; Wherein, the two ends of this bridge rectifier circuit are connected with three-stage amplifier, are connected with light-emitting component between two-stage amplifier and power supply; Between third stage amplifier and power supply, be connected with hummer.
2, as claimed in claim 1 from detecting sound and light alarm formula low pressure test pencil, it is characterized in that: described three-stage amplifier more specifically is meant the common emitter three-stage amplifier, and wherein the two ends of this light-emitting component are connected with collector, the power supply of two-stage amplifier respectively; The two ends of this hummer are connected with collector, the power supply of third stage amplifier respectively.
3, as claimed in claim 1 or 2 from detecting sound and light alarm formula low pressure test pencil, it is characterized in that: in described insulation crust, be provided with test button.
4, as claimed in claim 1 or 2 from detecting sound and light alarm formula low pressure test pencil, it is characterized in that: described light-emitting component is a light emitting diode.
5, as claimed in claim 1 or 2 from detecting sound and light alarm formula low pressure test pencil, it is characterized in that: the two ends of described bridge rectifier circuit also are connected with filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420116162 CN2752778Y (en) | 2004-12-03 | 2004-12-03 | Self-detecting acousto-optic alarming low-voltage electroprobe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420116162 CN2752778Y (en) | 2004-12-03 | 2004-12-03 | Self-detecting acousto-optic alarming low-voltage electroprobe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2752778Y true CN2752778Y (en) | 2006-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420116162 Expired - Fee Related CN2752778Y (en) | 2004-12-03 | 2004-12-03 | Self-detecting acousto-optic alarming low-voltage electroprobe |
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| Country | Link |
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| CN (1) | CN2752778Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629182A (en) * | 2015-12-24 | 2016-06-01 | 天津齐纳星科技有限公司 | Power supply detector |
| CN106841751A (en) * | 2017-04-17 | 2017-06-13 | 徐向伦 | A kind of voltage up-down quantitative determination circuits/devices |
| 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 |
| CN114924150A (en) * | 2022-05-18 | 2022-08-19 | 深圳市力子光电科技有限公司 | Detection device and system for detecting aging performance of electrical components |
-
2004
- 2004-12-03 CN CN 200420116162 patent/CN2752778Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629182A (en) * | 2015-12-24 | 2016-06-01 | 天津齐纳星科技有限公司 | Power supply detector |
| 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 |
| CN106841751A (en) * | 2017-04-17 | 2017-06-13 | 徐向伦 | A kind of voltage up-down quantitative determination circuits/devices |
| CN106841751B (en) * | 2017-04-17 | 2023-05-09 | 郑州伏特电子科技有限公司 | Voltage rise and fall quantitative detection circuit/device |
| CN114924150A (en) * | 2022-05-18 | 2022-08-19 | 深圳市力子光电科技有限公司 | Detection device and system for detecting aging performance of electrical components |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |