CN204855696U - Earth detector - Google Patents
Earth detector Download PDFInfo
- Publication number
- CN204855696U CN204855696U CN201520519018.2U CN201520519018U CN204855696U CN 204855696 U CN204855696 U CN 204855696U CN 201520519018 U CN201520519018 U CN 201520519018U CN 204855696 U CN204855696 U CN 204855696U
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- Prior art keywords
- resistance
- triode
- switch
- accumulator
- electric capacity
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- 238000012360 testing method Methods 0.000 claims abstract description 26
- 239000000523 sample Substances 0.000 claims abstract description 23
- 229910052754 neon Inorganic materials 0.000 claims description 7
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical group [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 230000005669 field effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000003534 oscillatory effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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Abstract
The utility model discloses an earth detector, including handle, probe rod, probe, gauge outfit, detection circuitry board, battery, button and switch, the detection circuitry board includes resistance, controlling resistor, electric capacity, triode and loudspeaker. The utility model relates to a rationally, simple structure, low cost, small, carry convenient to use and can play two kinds of testing capabilities in test pencil and the universal meter.
Description
Technical field
The utility model relates to a kind of electrician tool, is specifically related to a kind of earth detector.
Background technology
In the offshore oil production process of oil field, equipment is all connected with the multiple electrical equipment such as motor, oil pump, power distribution cabinet.At present, electrical equipment in work or cable machinery, owing to work long hours or the reason such as overload causes leaky, especially at the scene of oil field offshore oil production, if not by Timeliness coverage, device likely can be caused to burn or the generation of the accident phenomenon that causes casualties, cause damage to enterprise, what impact was produced carries out smoothly.Prior art is for the earth detection of equipment, and test pencil or the multimeter mode of adopting detects more, and both are used alone and often detect inaccurate, and two kinds of instruments all carry, and the larger use of multimeter volume has inconvenience more, gives to detect workman and cause trouble.
Summary of the invention
The purpose of this utility model is exactly the defect existed for prior art, provides a kind of earth detector.
Its technical scheme is: earth detector, comprise handle, feeler lever, probe, gauge outfit, testing circuit plate, accumulator, button and switch, one end of described handle connects one end of feeler lever, the other end of feeler lever is provided with probe, be provided with testing circuit plate and accumulator in handle, outside described handle one end, be provided with gauge outfit, button and switch, described probe, gauge outfit, accumulator, button and switch are electrically connected with testing circuit plate respectively, described handle end is provided with the charging socket be connected in parallel with accumulator two ends, described handle is right cylinder or the rectangular structure of interior sky, described feeler lever is Telescopic metal bar, its end is provided with the spherical probe of round metal, described testing circuit plate comprises resistance, adjustable resistance, electric capacity, triode and loudspeaker, described probe is connected with the moved end of switch, one quiet end of switch is connected with the grid of the first triode, the drain electrode of the first triode is connected with one end of the first resistance and one end of adjustable resistance, the other end of adjustable resistance and one end of the second resistance, the emitter of the 3rd triode, the positive pole of the second electric capacity and one end of button are connected, the other end of the first resistance is connected with the base stage of one end of the first electric capacity and the second triode, the other end of the first electric capacity is connected with one end of loudspeaker by the collector of the 3rd resistance with the 3rd triode, the collector of the second triode is connected with the base stage of the other end of the second resistance and the 3rd triode, the other end of button is connected with one end of the positive pole of accumulator and charging socket, the negative pole of described accumulator and the other end of charging socket, the source electrode of the first triode, the emitter of the second triode, the other end of loudspeaker, the negative pole of the second electric capacity and one end of the 4th resistance are connected, another quiet end of described switch is connected with the other end of the 4th resistance.
The voltage of described accumulator is 6V; Described switch is single-pole double-throw switch (SPDT); The resistance of described first resistance is 47K, and the resistance of the second resistance is 6.8K, and the resistance of the 3rd resistance is 2K, and the resistance of the 4th resistance is 1M; The resistance of described adjustable resistance is 10K; The capacity of described first electric capacity is 0.047u, and the capacity of the second electric capacity is 100u, and withstand voltage is 16V; Described first triode is field effect transistor, and its model is 3DJ6, and the model of the second triode is the model of the 8050, three triode is 8550; Described loudspeaker are the small-sized moving-coil speaker of 8 Ω internal resistances; Described gauge outfit is the alternating current ammeter of 50uA or is neon bulb.
The utility model compared with prior art, has the following advantages: reasonable in design, structure is simple, with low cost, volume is little, it is convenient to portably use and can play test pencil and multimeter two kinds of test functions.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of the utility model;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of the utility model.
Embodiment
With reference to Fig. 1-Fig. 2, a kind of earth detector, comprise handle 1, feeler lever 2, probe 3, gauge outfit 4, testing circuit plate 5, accumulator 6, button 7 and switch 8, one end of described handle 1 connects one end of feeler lever 2, the other end of feeler lever 2 is provided with probe 3, be provided with testing circuit plate 5 and accumulator 6 in handle 1, outside described handle 1 one end, be provided with gauge outfit 4, button 7 and switch 8; Described probe 3, gauge outfit 4, accumulator 6, button 7 and switch 8 are electrically connected with testing circuit plate 5 respectively, and described handle 1 end is provided with the charging socket 9 be connected in parallel with accumulator 6 two ends.
Described handle 1 is right cylinder or the rectangular structure of interior sky.Described feeler lever 2 is Telescopic metal bar, and its end is provided with the spherical probe of round metal 3.Described testing circuit plate 5 comprises resistance R1-R4, adjustable resistance W, electric capacity C1-C2, triode T1-T3 and loudspeaker L, described probe 3 is connected with the moved end of switch 8, one quiet end of switch 8 is connected with the grid of the first triode T1, the drain electrode of the first triode T1 is connected with one end of the first resistance R1 and one end of adjustable resistance W, the other end of adjustable resistance W and one end of the second resistance R2, the emitter of the 3rd triode T3, the positive pole of the second electric capacity C2 and one end of button 7 are connected, the other end of the first resistance R1 is connected with the base stage of one end of the first electric capacity C1 and the second triode T2, the other end of the first electric capacity C1 is connected with one end of loudspeaker L with the collector of the 3rd triode T3 by the 3rd resistance R3, the collector of the second triode T2 is connected with the base stage of the other end of the second resistance R2 and the 3rd triode T3, the other end of button 7 is connected with one end of the positive pole of accumulator 6 and charging socket 9, the negative pole of described accumulator 6 and the other end of charging socket 9, the source electrode of the first triode T1, the emitter of the second triode, the other end of loudspeaker, the negative pole of the second electric capacity and one end of the 4th resistance are connected, another quiet end of described switch 8 is connected with the other end of the 4th resistance R4.Described handle 1 end is provided with link 10.The voltage of described accumulator 6 is 6V; Described switch 8 is single-pole double-throw switch (SPDT); The resistance of described first resistance R1 is 47K, and the resistance of the second resistance R2 is 6.8K, and the resistance of the 3rd resistance R3 is 2K, and the resistance of the 4th resistance R4 is 1M; The resistance of described adjustable resistance resistance is 10K; The capacity of described first electric capacity C1 is 0.047u, and the capacity of the second electric capacity C2 is 100u, and withstand voltage is 16V; Described first triode T1 is field effect transistor, and its model is 3DJ6, and the model of the second triode T2 is the model of the 8050, three triode T3 is 8550; Described loudspeaker L is the small-sized moving-coil speaker of 8 Ω internal resistances; Described gauge outfit 4 is the alternating current ammeter of 50uA or is neon bulb.
During use, staff's handle 1, contacts the probe 3 of feeler lever 2 end or close to test body.Operating switch 8 makes its moved end be connected with the grid of the first triode, and now this device is in induction test mode, and when pressing the button 7, namely circuit power is switched on.If this device probe 3 contact or not charged close to test body, then because field effect transistor T1 is in zero inclined state, resistance between its drain electrode and source electrode is less, the T2 base stage be connected is in low level (<0.65V) with draining, T2 is because being in cut-off state without suitable bias current, the oscillatory circuit be made up of T2 and T3 etc. does not work, and loudspeaker L is noiseless.Once this device probe 3 contact or charged close to test body, the probe 3 be connected with T1 grid will receive faint electric field signal, resistance value between T1 leakage, source electrode is increased, its component voltage (referring to for adjustable resistance W) rises thereupon, namely T2 obtains suitable bias current and conducting, the oscillatory circuit be made up of T2 and T3 etc. works immediately, and oscillating current, by loudspeaker L, makes it to send loud " beep ... " sound.In circuit, adjustable resistance W is used for adjusting detection sensitivity.The frequency of operation of oscillatory circuit depends primarily on time constant t=R1 × C1, therefore increase and decrease resistor R1 resistance or capacitor C1 capacity just can change the tone of loudspeaker L sounding.C2 is alternating current bypass capacitor, be mainly used to reduce accumulator 6 interchange in resistance, make loudspeaker L sounding louder.Operating switch 8 makes its moved end be connected with gauge outfit 4, this device is in engaged test state, now needs the hand of staff's handle 1 to touch charging socket 9, if this device probe 3 contact or not charged close to test body, then gauge outfit 4 zero deflection (as used neon bulb, then neon bulb does not work); Once this device probe 3 contact or charged close to test body, gauge outfit 4 deflects (as used neon bulb, then neon bulb is luminous).
The utility model is reasonable in design, structure is simple, with low cost, volume is little, it is convenient to portably use and can play test pencil and multimeter two kinds of test functions.
Claims (2)
1. earth detector, comprise handle, feeler lever, probe, gauge outfit, testing circuit plate, accumulator, button and switch, one end of described handle connects one end of feeler lever, the other end of feeler lever is provided with probe, be provided with testing circuit plate and accumulator in handle, outside described handle one end, be provided with gauge outfit, button and switch, described probe, gauge outfit, accumulator, button and switch are electrically connected with testing circuit plate respectively, described handle end is provided with the charging socket be connected in parallel with accumulator two ends, described handle is right cylinder or the rectangular structure of interior sky, described feeler lever is Telescopic metal bar, its end is provided with the spherical probe of round metal, it is characterized in that: described testing circuit plate comprises resistance, adjustable resistance, electric capacity, triode and loudspeaker, described probe is connected with the moved end of switch, one quiet end of switch is connected with the grid of the first triode, the drain electrode of the first triode is connected with one end of the first resistance and one end of adjustable resistance, the other end of adjustable resistance and one end of the second resistance, the emitter of the 3rd triode, the positive pole of the second electric capacity and one end of button are connected, the other end of the first resistance is connected with the base stage of one end of the first electric capacity and the second triode, the other end of the first electric capacity is connected with one end of loudspeaker by the collector of the 3rd resistance with the 3rd triode, the collector of the second triode is connected with the base stage of the other end of the second resistance and the 3rd triode, the other end of button is connected with one end of the positive pole of accumulator and charging socket, the negative pole of described accumulator and the other end of charging socket, the source electrode of the first triode, the emitter of the second triode, the other end of loudspeaker, the negative pole of the second electric capacity and one end of the 4th resistance are connected, another quiet end of described switch is connected with the other end of the 4th resistance.
2. earth detector according to claim 1, is characterized in that: the voltage of described accumulator is 6V; Described switch is single-pole double-throw switch (SPDT); The resistance of described first resistance is 47K, and the resistance of the second resistance is 6.8K, and the resistance of the 3rd resistance is 2K, and the resistance of the 4th resistance is 1M; The resistance of described adjustable resistance is 10K; The capacity of described first electric capacity is 0.047u, and the capacity of the second electric capacity is 100u, and withstand voltage is 16V; Described first triode is field effect transistor, and its model is 3DJ6, and the model of the second triode is the model of the 8050, three triode is 8550; Described loudspeaker are the small-sized moving-coil speaker of 8 Ω internal resistances; Described gauge outfit is the alternating current ammeter of 50uA or is neon bulb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520519018.2U CN204855696U (en) | 2015-07-16 | 2015-07-16 | Earth detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520519018.2U CN204855696U (en) | 2015-07-16 | 2015-07-16 | Earth detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204855696U true CN204855696U (en) | 2015-12-09 |
Family
ID=54746233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520519018.2U Expired - Fee Related CN204855696U (en) | 2015-07-16 | 2015-07-16 | Earth detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204855696U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345785A (en) * | 2015-12-12 | 2016-02-24 | 国网山东夏津县供电公司 | Smart toolbox |
| CN108181539A (en) * | 2017-11-29 | 2018-06-19 | 国网河南省电力公司偃师市供电公司 | A kind of electric power system leak current fault detection method and device |
| CN109959834A (en) * | 2017-12-14 | 2019-07-02 | 中国石油天然气股份有限公司 | Earth detector |
| CN113075582A (en) * | 2021-03-31 | 2021-07-06 | 广东电网有限责任公司广州供电局 | Electric leakage detection device of energy storage system |
-
2015
- 2015-07-16 CN CN201520519018.2U patent/CN204855696U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345785A (en) * | 2015-12-12 | 2016-02-24 | 国网山东夏津县供电公司 | Smart toolbox |
| CN108181539A (en) * | 2017-11-29 | 2018-06-19 | 国网河南省电力公司偃师市供电公司 | A kind of electric power system leak current fault detection method and device |
| CN109959834A (en) * | 2017-12-14 | 2019-07-02 | 中国石油天然气股份有限公司 | Earth detector |
| CN113075582A (en) * | 2021-03-31 | 2021-07-06 | 广东电网有限责任公司广州供电局 | Electric leakage detection device of energy storage system |
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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: 20151209 Termination date: 20170716 |