CN102636724A - Portable multi-functional serial crosstalk detector - Google Patents
Portable multi-functional serial crosstalk detector Download PDFInfo
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- CN102636724A CN102636724A CN2012101399823A CN201210139982A CN102636724A CN 102636724 A CN102636724 A CN 102636724A CN 2012101399823 A CN2012101399823 A CN 2012101399823A CN 201210139982 A CN201210139982 A CN 201210139982A CN 102636724 A CN102636724 A CN 102636724A
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Abstract
The invention relates to a portable multi-functional serial crosstalk detector, which is suitable for detecting a failure of alternating and direct current hybrid junction of a transformer substation. The portable multi-functional serial crosstalk detector comprises a shell and a non-contact electricity testing unit; the non-contact electricity testing unit comprises a pair of electromagnetic induction sheets, an alternating current voltage amplifier, a driving and acousto-optic alarm circuit, a single-pole triple-throw switch SA and a battery E; one end of the pair of electromagnetic induction sheets is connected to an input end of the alternating current voltage amplifier in parallel; an output end of the alternating current voltage amplifier is connected with an input end of the driving and acousto-optic alarm circuit; and the battery E is connected to power ends of the alternating current voltage amplifier and the driving and acousto-optic alarm circuit through the single-pole triple-throw switch SA respectively. The portable multi-functional serial crosstalk detector has the advantages of high sensitivity, easiness for operation, convenience for carrying, accuracy and reliability.
Description
Technical field
The present invention relates to a kind of portable multi-function crosstalk detecting device, be applicable to the fault that detects transformer station's alternating current-direct current hybrid junction.
Background technology
There is the problem of alternating current-direct current hybrid junction in capital construction transformer station; Especially 500kV UHV (ultra-high voltage) transformer station, the secondary cable in protection screen cabinet, terminal box and the convergence control cabinet is various, and the secondary connection on the terminal row is close and numerous; Checking and accepting task amount before putting into operation is big; And particularly important, there is the carelessness influence normally to send electricity slightly, bring hidden danger to the stabilization of power grids.The method of inspection at present and processing alternating current-direct current hybrid junction is utilized the secondary drawing, to the figure line inspection, the method time and effort consuming.
When measuring with multimeter, the combined-voltage shelves are used also existing problems with: (1) alternating voltage shelves measuring DC voltage, and voltage table might perhaps double than actual dc voltage by non-metering, and concrete error size is that half-wave or all-wave are relevant with rectification in the table.In a word, the value of table is nonsensical.(2) shelves of direct voltage is measured alternating voltage, owing to frequency, can influence the flutter rate of pointer, and long-time use can cause the damage of multimeter.
Summary of the invention
Technical matters to be solved by this invention provides a kind of highly sensitive, simple to operate, easy to carry, detecting device of portable multi-function crosstalk accurately and reliably.
The present invention adopts following technical scheme:
The present invention includes housing and non-contact type electricity checking unit; Said non-contact type electricity checking unit comprises pair of electrical magnetic inductive film, alternating voltage amplifier, driving and sound light alarming circuit, single-pole triple-throw (SPTT) switch S A and battery E; One end of said pair of electrical magnetic inductive film is attempted by the input end of said alternating voltage amplifier; The output termination driving of said alternating voltage amplifier and the input end of sound light alarming circuit, said battery E is connected on the power end of alternating voltage amplifier and driving and sound light alarming circuit respectively through single-pole triple-throw (SPTT) switch S A.
Said non-contact type electricity checking unit also comprises lighting circuit, and the power end of said lighting circuit meets battery E through single-pole triple-throw (SPTT) switch S A.
Said crosstalk detecting device also comprises contact electrical verification unit, and said contact electrical verification unit comprises screwdriver formula sensor, rectification circuit, first to the 3rd amplification and optical alarm circuit and pushbutton switch SB;
The input end of the back termination rectification circuit of the Metallic rod of said screw blade type sensor; The output terminal of said rectification circuit connects the input end of first to the 3rd amplifier optical alarm circuit respectively, and said battery E connects the power end of first to the 3rd amplification and optical alarm circuit respectively through pushbutton switch SB.
Good effect of the present invention is following:
(1) the present invention has improved secondary circuit capital construction checking and accepting efficient greatly, and figure line inspection method is not only made things convenient for but also saves time more in the past the most important thing is more accurately more reliable.Searched in the past a 500kV line switching convergence control cabinet and terminal box whether crosstalk need 2 people/skies, take this crosstalk detecting device after, needs can efficiently be accomplished 1 people/half a day.Human and material resources and financial resources have been saved greatly.
(2) the present invention also have highly sensitive, easy to operate, easy to carry and characteristics accurately and reliably.
This detecting device is except inspection alternating current-direct current serial connection problem, and it also has following purposes:
(1) can judge easily whether 60V～220V AC power cord is charged;
(2) height of alternating voltage in the measurement certain limit;
(3) the convenient broken positions of measuring wire core.
Description of drawings
Accompanying drawing 1 is the principle calcspar (adopting the non-contact type electricity checking unit) of the embodiment of the invention 1.
Accompanying drawing 2 is the circuit theory diagrams of Fig. 1.
Accompanying drawing 3 is the principle calcspar of contact electrical verification unit.
Accompanying drawing 4 is the circuit theory diagrams of Fig. 3.
Fig. 5 is the front view of housing of the present invention.
Fig. 6 is the rear view of housing of the present invention.
In Fig. 1-6, the glass screen cover of the band of 1 electromagnetic induction sheet, 2 electromagnetic induction sheets, 3 screw blade type sensors, 4 housings, the 5 second to the 4th light emitting diode LD2-LED4 numeral printed words, 6 pushbutton switches (SB), 7 single-pole triple-throw (SPTT) switches (SA), 8 are from spotlighting bulb (DL), 9 battery case lids, 10 loudspeaker phonate holes, 11 first light emitting diodes (LED1).
Embodiment
Embodiment 1 (only comprising the non-contact type electricity checking unit) referring to Fig. 1, Fig. 2, Fig. 5 and Fig. 6:
Present embodiment comprises housing 4 and non-contact type electricity checking unit; Said non-contact type electricity checking unit comprises pair of electrical magnetic inductive film 1,2, alternating voltage amplifier, driving and sound light alarming circuit, single-pole triple-throw (SPTT) switch S A and battery E; One end of said pair of electrical magnetic inductive film 1,2 is attempted by the input end of said alternating voltage amplifier; The output termination driving of said alternating voltage amplifier and the input end of sound light alarming circuit, said battery E is connected on the power end of alternating voltage amplifier and driving and sound light alarming circuit respectively through single-pole triple-throw (SPTT) switch S A.
The structure of said pair of electrical magnetic inductive film 1,2 is identical, is the copper sheet of 5 * 10 * 0.5mm.
Said alternating voltage amplifier is made up of N channel field-effect pipe VT1, resistance R 1; That the grid g of said N channel field-effect pipe VT1 connects said pair of electrical magnetic inductive film 1,2 and connect end, its drain electrode d connects the positive pole of battery E successively through resistance R 1, single-pole triple-throw (SPTT) switch S A, and its source electrode s connects the negative pole of battery E;
Said driving and sound light alarming circuit are made up of transistor VT2-VT3, resistance R 2-R3, first LED 1 and loudspeaker HA; The base stage of transistor VT2 meets the drain electrode d of N channel field-effect pipe VT1 through resistance R 1; The collector of transistor VT2 connects the positive pole of battery E through single-pole triple-throw (SPTT) switch S A; The emitter of transistor VT2 connects the base stage of transistor VT3; The emitter of transistor VT3 connects the negative pole of battery E, and the collector of transistor VT3 connects the positive pole of battery E successively through resistance R 3, first LED 1, loudspeaker HA and single-pole triple-throw (SPTT) switch S A.
Said non-contact type electricity checking unit also comprises lighting circuit, and the power end of said lighting circuit meets battery E through single-pole triple-throw (SPTT) switch S A.
Said lighting circuit is by forming from spotlight bubble DL.
Said housing 4 is for falling " T " font, in the both ends of the horizontal arm that is contained in down " T " font housing lower end of said pair of electrical magnetic inductive film 1,2 symmetries.
The principle of work of embodiment 1 is following:
When pair of electrical magnetic inductive film during near alternating current-direct current hybrid junction circuit, the alternating magnetic field that alternating voltage produces acts on the pair of electrical magnetic inductive film; Be similar to and do the cutting magnetic induction line motion; Make on the pair of electrical magnetic inductive film and produce induction electromotive force, so just capture ac voltage signal, the pair of electrical magnetic inductive film is near more from electrified body; Sensitiveer, and then the induction electromotive force that produces is big more.
N channel field-effect pipe VT1 is a kind of voltage controlled element, and its input impedance is higher, needs only the variation that the voltage of giving to change at the input end grid just can be controlled output current, the 50Hz power-frequency voltage is changed particularly responsive.When the pair of electrical magnetic inductive film does not have induction electromotive force; VT1 is in zero state partially, because VT1 is a depletion type, so saturation conduction state all the time between its drain electrode d and the source electrode s; The VT2 base stage is lower than 0.65V through the bias voltage that R2 obtains, so VT2, VT3 are in cut-off state.When the pair of electrical magnetic inductive film is sensed faint alternating voltage, after amplifying through VT1, the 50Hz ac voltage signal that will amplify from its d output that drains, thus make VT2, VT3 also with same frequency conducting constantly with end.
When transistor VT3 conducting, to order about loudspeaker HA and send continuous sound, and light LED1, reminds people notices that pair of electrical magnetic inductive film place has detected alternating voltage and existed.
When single-pole triple-throw (SPTT) switch S A switch is got to 1 position, start noncontact electrical verification unit; SA gets to 2 position, is in closed condition, not power consumption of detecting device; When SA gets to 3 position, start lighting loop, both can be used for the short time illumination at night, can when the maintenance electric device, illuminate secondary circuit again.
Embodiment 2 (both comprised the non-contact type electricity checking unit, and comprised contact electrical verification unit again, and seen Fig. 1-6):
What embodiment 2 and embodiment 1 were different is that it also comprises contact electrical verification unit, and said contact electrical verification unit comprises screwdriver formula sensor 3, rectification circuit, first to the 3rd amplification and optical alarm circuit and pushbutton switch SB;
The input end of the back termination rectification circuit of the Metallic rod of said screw blade type sensor 3; The output terminal of said rectification circuit connects the input end of first to the 3rd amplifier optical alarm circuit respectively, and said battery E connects the power end of first to the 3rd amplification and optical alarm circuit respectively through pushbutton switch SB.
Said screw blade type sensor 3 is " one " font or " ten " font screwdriver; The Metallic rod rear end of said screwdriver.
Said first to the 3rd amplification and optical alarm circuit are made up of transistor VT4-VT6, potentiometer RW1-RW3, resistance R 4-R6, capacitor C 1-C3 and second to the 4th LED 2-LED4;
The structure of said first to the 3rd amplification and optical alarm circuit is identical, and wherein first amplification and optical alarm circuit are made up of transistor VT4, potentiometer RW1, resistance R 4, capacitor C 1 and second LED 2; The base stage of said transistor VT4 connects the negative pole of said commutation diode D through potentiometer RW1; The emitter of said transistor VT4 connects the negative pole of said battery E, and the collector of said transistor VT4 connects the positive pole of said battery E successively through second LED 2, resistance R 4, pushbutton switch SB;
The base stage of said VT5-VT6 connects the negative pole of said commutation diode respectively through potentiometer RW2, RW3.
Said screw blade type sensor 3 is fixed on down the upper end of " T " font housing.
The principle of work of the contact electrical verification unit among the embodiment 2 is following:
Be about the straight screwdriver 3 of 55mm, both can be used as screwdriver and have used, be used as the contact probe simultaneously again, it can directly contact with electrified body, but housing 4 will guarantee insulation.
After pressing the button switch S B button, screw blade type sensor 3 is contacted with a certain unknown AC power, then alternating current is after commutation diode D rectification, and input first to the 3rd is amplified and sound alarm circuit.According to the height of voltage to be measured, the resistance (carrying out under the power supply disconnection) of adjustment RW1, RW2 and RW3, after debugging, if the VT4 conducting, LED2 is bright, then voltage≤the 60V that surveys; If VT4～VT5 conducting, LED2～LED3 is bright, and then the voltage of surveying is about 110V; If VT4～VT6 conducting, LED2～LED4 is bright, and then institute's voltage of surveying is>=220V.
With the glass screen cover 5 of digital printed words is according to the size of measuring alternating voltage, shows 60V, 110V, three numerical value of 220V successively, when AC signal during less than 60V, has only the 60V printed words to light, and a little less than the brightness; When AC signal during greater than 220V, 60V, 110V, three printed words of 220V are bright entirely, and brightness is stronger.R4～R6 is the current-limiting resistance of LED2-LED4, and electric current is limited in the 15-20mA ratings.Capacitor C 1～C3 is anti-tampering electric capacity.The resistance of RW1～RW3, R4-R6 is all debugged under the situation that power supply breaks off.
The present invention can measure whether it charged apart from tested AC power cord 2cm～15cm place.When using its noncontact electroscope function,, slowly move from top to bottom along terminal row apart from terminal row secondary connection 6cm place; When sound and light alarm; Explain to have alternating voltage here, whether compare line this moment No.1 consistent with drawing, and use the other end of this detecting device; Start the contact electroscope function, judge further which root cable core is charged and measure with the amplitude of alternating voltage.When detect to exchange, whether direct current during hybrid junction, break off each DC loop sky and open, and only closes the ac circuit sky and open, such detection effect is better.
Can also detect the broken end position of wire core with this detecting device, as long as pass to 220V voltage for tested core, with this detecting device near by survey line; Make loudspeaker sounding, LED 1 luminous; Progressively move along this line length direction again, move on one side inspection on one side.The place that LED1 extinguishes is exactly disconnected core position, bonding part really.
Claims (10)
1. a portable multi-function crosstalk detecting device is characterized in that comprising housing (4) and non-contact type electricity checking unit; Said non-contact type electricity checking unit comprises pair of electrical magnetic inductive film (1,2), alternating voltage amplifier, driving and sound light alarming circuit, single-pole triple-throw (SPTT) switch S A and battery E; One end of said pair of electrical magnetic inductive film (1,2) is attempted by the input end of said alternating voltage amplifier; The output termination driving of said alternating voltage amplifier and the input end of sound light alarming circuit, said battery E is connected on the power end of alternating voltage amplifier and driving and sound light alarming circuit respectively through single-pole triple-throw (SPTT) switch S A.
2. portable multi-function crosstalk detecting device according to claim 1 is characterized in that the structure of said pair of electrical magnetic inductive film (1,2) is identical, is the copper sheet of 5 * 10 * 0.5mm.
3. portable multi-function crosstalk detecting device according to claim 2 is characterized in that said alternating voltage amplifier is made up of N channel field-effect pipe VT1, resistance R 1; That the grid g of said N channel field-effect pipe VT1 connects said pair of electrical magnetic inductive film (1,2) and connect end, its drain electrode d connects the positive pole of battery E successively through resistance R 1, single-pole triple-throw (SPTT) switch S A, and its source electrode s connects the negative pole of battery E;
Said driving and sound light alarming circuit are made up of transistor VT2-VT3, resistance R 2-R3, first LED 1 and loudspeaker HA; The base stage of transistor VT2 meets the drain electrode d of N channel field-effect pipe VT1 through resistance R 1; The collector of transistor VT2 connects the positive pole of battery E through single-pole triple-throw (SPTT) switch S A; The emitter of transistor VT2 connects the base stage of transistor VT3; The emitter of transistor VT3 connects the negative pole of battery E, and the collector of transistor VT3 connects the positive pole of battery E successively through resistance R 3, first LED 1, loudspeaker HA and single-pole triple-throw (SPTT) switch S A.
4. according to claim 1 or 3 described portable multi-function crosstalk detecting devices, it is characterized in that said non-contact type electricity checking unit also comprises lighting circuit, the power end of said lighting circuit meets battery E through single-pole triple-throw (SPTT) switch S A.
5. portable multi-function crosstalk detecting device according to claim 4 is characterized in that said lighting circuit is by forming from spotlight bubble DL.
6. portable multi-function crosstalk detecting device according to claim 5 is characterized in that said housing (4) for falling " T " font, in the both ends of the horizontal arm that is contained in down " T " font housing lower end of said pair of electrical magnetic inductive film (1,2) symmetry.
7. according to claim 1 or 6 described portable multi-function crosstalk detecting devices; It is characterized in that said crosstalk detecting device also comprises contact electrical verification unit, said contact electrical verification unit comprises screwdriver formula sensor (3), rectification circuit, first to the 3rd amplification and optical alarm circuit and pushbutton switch SB;
The input end of the back termination rectification circuit of the Metallic rod of said screw blade type sensor (3); The output terminal of said rectification circuit connects the input end of first to the 3rd amplifier optical alarm circuit respectively, and said battery E connects the power end of first to the 3rd amplification and optical alarm circuit respectively through pushbutton switch SB.
8. portable multi-function crosstalk detecting device according to claim 7 is characterized in that said screw blade type sensor (3) is " one " font or " ten " font screwdriver;
Said rectification circuit is made up of commutation diode D; The positive pole of commutation diode D connects the Metallic rod rear end of said screwdriver.
9. portable multi-function crosstalk detecting device according to claim 8 is characterized in that said first to the 3rd amplifies and optical alarm circuit is made up of transistor VT4-VT6, potentiometer RW1-RW3, resistance R 4-R6, capacitor C 1-C3 and second to the 4th LED 2-LED4;
The structure of said first to the 3rd amplification and optical alarm circuit is identical, and wherein first amplification and optical alarm circuit are made up of transistor VT4, potentiometer RW1, resistance R 4, capacitor C 1 and second LED 2; The base stage of said transistor VT4 connects the negative pole of said commutation diode D through potentiometer RW1; The emitter of said transistor VT4 connects the negative pole of said battery E, and the collector of said transistor VT4 connects the positive pole of said battery E successively through second LED 2, resistance R 4, pushbutton switch SB;
The base stage of said VT5-VT6 connects the negative pole of said commutation diode respectively through potentiometer RW2, RW3.
10. portable multi-function crosstalk detecting device according to claim 9 is characterized in that said screw blade type sensor (3) is fixed on down the upper end of " T " font housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210139982.3A CN102636724B (en) | 2012-05-08 | 2012-05-08 | Portable multi-functional serial crosstalk detector |
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| CN201210139982.3A CN102636724B (en) | 2012-05-08 | 2012-05-08 | Portable multi-functional serial crosstalk detector |
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| CN102636724B CN102636724B (en) | 2014-08-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323655A (en) * | 2013-06-08 | 2013-09-25 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
| CN105116352A (en) * | 2015-09-01 | 2015-12-02 | 国网辽宁省电力有限公司鞍山供电公司 | Mixed connection detection method of two sets of direct-current power supply systems of transformer substation |
| CN105595498A (en) * | 2016-02-19 | 2016-05-25 | 武汉华星光电技术有限公司 | Safety helmet having warning function |
| CN108858014A (en) * | 2018-07-20 | 2018-11-23 | 宁波市鸿博百捷自动化设备有限公司 | A kind of hand universal-purpose screwdriver |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132996Y (en) * | 1992-07-31 | 1993-05-12 | 赵明军 | Multifunction base check apparatus |
| CN2169856Y (en) * | 1993-09-25 | 1994-06-22 | 郭科林 | Multi-purpose electronic power measuring tool |
| EP0827266A2 (en) * | 1996-08-29 | 1998-03-04 | Mitsubishi Denki Kabushiki Kaisha | High-side type motor current detecting circuit |
| JPH10160764A (en) * | 1996-11-27 | 1998-06-19 | Yokogawa Electric Corp | Input circuit for insulating-voltage measuring apparatus |
| JP2009183038A (en) * | 2008-01-30 | 2009-08-13 | Fujitsu General Ltd | Power supply device and equipment provided therewith |
| CN202693714U (en) * | 2012-05-08 | 2013-01-23 | 国家电网公司 | Portable multifunctional electricity mixing detector |
-
2012
- 2012-05-08 CN CN201210139982.3A patent/CN102636724B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2132996Y (en) * | 1992-07-31 | 1993-05-12 | 赵明军 | Multifunction base check apparatus |
| CN2169856Y (en) * | 1993-09-25 | 1994-06-22 | 郭科林 | Multi-purpose electronic power measuring tool |
| EP0827266A2 (en) * | 1996-08-29 | 1998-03-04 | Mitsubishi Denki Kabushiki Kaisha | High-side type motor current detecting circuit |
| JPH10160764A (en) * | 1996-11-27 | 1998-06-19 | Yokogawa Electric Corp | Input circuit for insulating-voltage measuring apparatus |
| JP2009183038A (en) * | 2008-01-30 | 2009-08-13 | Fujitsu General Ltd | Power supply device and equipment provided therewith |
| CN202693714U (en) * | 2012-05-08 | 2013-01-23 | 国家电网公司 | Portable multifunctional electricity mixing detector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323655A (en) * | 2013-06-08 | 2013-09-25 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
| CN103323655B (en) * | 2013-06-08 | 2015-04-29 | 国家电网公司 | Non-contact alternating current and direct current crosstalk online detecting device and non-contact alternating current and direct current crosstalk online detecting method |
| CN105116352A (en) * | 2015-09-01 | 2015-12-02 | 国网辽宁省电力有限公司鞍山供电公司 | Mixed connection detection method of two sets of direct-current power supply systems of transformer substation |
| CN105116352B (en) * | 2015-09-01 | 2018-06-26 | 国网辽宁省电力有限公司鞍山供电公司 | The double set DC power system string electro-detection methods of substation |
| CN105595498A (en) * | 2016-02-19 | 2016-05-25 | 武汉华星光电技术有限公司 | Safety helmet having warning function |
| CN108858014A (en) * | 2018-07-20 | 2018-11-23 | 宁波市鸿博百捷自动化设备有限公司 | A kind of hand universal-purpose screwdriver |
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| CN102636724B (en) | 2014-08-13 |
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