CN103954826A - High-voltage alternating-current electroscope - Google Patents
High-voltage alternating-current electroscope Download PDFInfo
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- CN103954826A CN103954826A CN201410194149.8A CN201410194149A CN103954826A CN 103954826 A CN103954826 A CN 103954826A CN 201410194149 A CN201410194149 A CN 201410194149A CN 103954826 A CN103954826 A CN 103954826A
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Abstract
The invention relates to a high-voltage alternating-current electroscope which is used for high-voltage alternating-current line detection. An alarm can be given without touching of a high-voltage alternating-current line. The electroscope comprises a shell, an electroscopic device, a metal cap, a conducting ring, an insulating rod and an operating handle, wherein the electroscopic device is arranged inside the shell, the metal cap is arranged at the top end of the shell, and the conducting ring, the insulating rod and the operating handle are sequentially arranged on one side of the shell. The operating handle is connected with the shell through the insulating rod. The electroscopic device comprises a battery, a voltage conversion circuit, a field-effect tube switching circuit and a signal indicating circuit. One end of the input end of the voltage conversion circuit is connected with the metal cap, and the other end of the input end of the voltage conversion circuit is connected with the conducting ring. The field-effect tube switching circuit is respectively connected with the battery, the voltage conversion circuit and the signal indicating circuit. The battery is connected with the signal indicating circuit. Compared with the prior art, the high-voltage alternating-current electroscope has the advantages of being high in sensitivity, low in fault rate, low in power consumption, high in reliability, good in applicability and the like.
Description
Technical field
The present invention relates to a kind of electroscope, especially relate to a kind of high-voltage AC electroscope.
Background technology
High-voltage AC electroscope is widely used in power industry, however the high voltage electroscope of prior art remain in some shortcomings, cause at the effect of part occasion not ideal enoughly, and can cause certain potential safety hazard.The electroscope weak point of prior art has following three aspects::
One, sensitivity is low, has the possibility that electricity is not indicated.Existing electroscope adopts low-impedance triode pre-amplification circuit, input impedance is very little, need very large electric potential difference to drive, operations staff reflects that a lot of electroscopes are around having the grading ring of electric equipment, during the horizontal electrical verification in vertical operation corridor, electroscope indication is without electricity, although reason is that under these occasions, equipment is charged, yet the field intensity in electroscope space of living in, electric potential difference are less, cause the prior art products of low input impedance to have the possibility that electricity is not indicated.
Two, cannot differentiate induced voltage and system voltage.The electroscope of prior art can only reflect that whether equipment is with system voltage, many times during equipment cold standby still with induced voltage, if now rashly carry out the work and still can cause electric shock accidents, yet existing electroscope can not be indicated induced voltage, just in case perform region imperfect earth, there is induced voltage, still can cause getting an electric shock.
Three, failure rate is high, battery consumption is fast.The electroscope internal circuit of prior art is complicated, comprises polylith gate circuit and triode amplifier, thereby causes its failure rate high, and most of product stand-by power consumption is large, even once need not, battery also can exhaust in some months, the workload of changing the in a large number battery manpower that wastes financial resources.
The shortcoming that the electroscope of prior art exists, has caused a lot of personnel to touch charging equipment by mistake, has stepped on the major accident of charged shaft tower by mistake, therefore develops a kind of new technology that can overcome prior art shortcoming just particularly necessary.
Summary of the invention
Object of the present invention is exactly that a kind of highly sensitive, failure rate is low, the high-voltage AC electroscope that low in energy consumption, reliability is high, applicability is good are provided in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of high-voltage AC electroscope, for high-voltage alternating wireline inspection, can contact high-voltage alternating circuit just can report to the police, described electroscope comprises housing and is arranged on electroscopic device in housing, the metal that is arranged on housing top emits, be successively set on the conducting ring of housing one side, insulating bar and operating grip, described operating grip is connected with housing by insulating bar, described electroscopic device comprises battery, it is characterized in that, described electroscopic device also comprises voltage conversion circuit, FET switch circuit and signal indicating circuit, described voltage conversion circuit input end one end emits and is connected with metal, the other end is connected with conducting ring, described FET switch circuit respectively with battery, voltage conversion circuit is connected with signal indicating circuit, described battery is connected with signal indicating circuit.
Described voltage conversion circuit comprises rectifier bridge D1, flat wave capacitor C, resistance R 1, resistance R 2, described FET switch circuit comprises field effect transistor V1, V2, described signal indicating circuit comprises light emitting diode D3, D4, current-limiting resistance R3, R4 and the hummer B in parallel with resistance R 4, in parallel with hummer B after described light emitting diode D3 connects with current-limiting resistance R3, described light emitting diode D4 connects with current-limiting resistance R4;
Described rectifier bridge D1 input end is used for responding to AC field, and output terminal is connected on flat wave capacitor C two ends in order to filtering, after described resistance R 1, resistance R 2 series connection, is connected in parallel on flat wave capacitor C two ends;
The source electrode of described field effect transistor V1 is connected with the negative pole of light emitting diode D3, and grid is connected between resistance R 1, resistance R 2, and drain electrode is connected with battery cathode;
The source electrode of described field effect transistor V2 is connected with the negative pole of light emitting diode D4, and grid is connected between the peaceful ripple capacitor C of resistance R 1, and drain electrode is connected with battery cathode:
Described anode is respectively by being connected with the positive pole of light emitting diode D3, D4 after current-limiting resistance R3, R4;
When device enters in hyperbaric environment, voltage conversion circuit converts alternating voltage to DC voltage, through resistance R 1 and resistance R 2 dividing potential drops, drives respectively field effect transistor V1, V2 conducting, and the luminous and hummer B buzzing of light emitting diode D3, D4 is reported to the police.
Described electroscopic device also comprises self-checking circuit, described voltage conversion circuit comprises diode D1-2, D2-2 and alarm delay circuit, divider resistance R1-2, R2-2 and voltage stabilizing diode D8, described alarm delay circuit comprises the capacitor C 1 of series connection, C2, described FET switch circuit comprises field effect transistor V1-2, V2-2, described signal indicating circuit comprises light emitting diode D3-2 in parallel, D4-2, the resistance R 3-2 connecting with light emitting diode D3-2 and the hummer B-2 connecting with light emitting diode D4-2, described self-checking circuit comprises diode D5, D6 and pushbutton switch SA:
After described diode D1-2, D2-2 series connection, and be all connected in parallel on alarm delay circuit two ends after divider resistance R1-2, R2-2 series connection, described voltage stabilizing diode D8 is anodal to be connected with the positive pole of diode D2-2, and described voltage stabilizing diode D8 negative pole is connected with the negative pole of diode D1-2;
The grid of described field effect transistor V1-2 is connected between divider resistance R1-2, R2-2, is connected with diode D6 negative pole simultaneously, and source electrode is connected with light emitting diode D4-2 negative pole, and drain electrode is connected with battery cathode;
The grid of described field effect transistor V2-2 is connected between divider resistance R1-2 and voltage stabilizing diode D8 negative pole, is connected with diode D5 negative pole simultaneously, and source electrode is connected with light emitting diode D3-2 negative pole, and drain electrode is connected with battery cathode;
Described pushbutton switch SA one end is connected with diode D6 is anodal with diode D5 is anodal respectively, and the other end is connected with anode;
Described anode is connected with resistance R 3-2 with hummer B-2 respectively:
When device enters in hyperbaric environment, voltage conversion circuit converts alternating voltage to DC voltage, through divider resistance R1-2, R2-2 dividing potential drop, drive respectively field effect transistor V1-2, V2-2 conducting, the luminous and hummer B-2 buzzing of light emitting diode D3-2, D4-2 is reported to the police.
Between described divider resistance R1-2 and diode D5 negative pole, be provided with bidirectional trigger diode D7, in order to improve the switch performance of diode D5, half conduction problem when eliminating it and approaching voltage threshold value.
Described electroscopic device also comprises alarm delay circuit, described alarm delay circuit comprises the capacitor C 2-3 in parallel with signal indicating circuit, described voltage conversion circuit comprises diode D1-3, capacitor C 1-3, resistance R 1-3 and voltage stabilizing diode D8-3, described FET switch circuit comprises field effect transistor V1-3 and resistance R 5-3, described signal indicating circuit comprises resistance R 4-3, light emitting diode D4-3, diode D2-3, resistance R 3-3 and light emitting diode D3-3
Described diode D1-3 is connected in parallel on capacitor C 1-3 two ends, after described resistance R 1-3 and voltage stabilizing diode D8-3 series connection, is connected in parallel on capacitor C 1-3 two ends, and described voltage stabilizing diode D8-3 negative pole is connected with resistance R 1-3, and positive pole is connected with diode D1-3 is anodal;
Described field effect transistor V1-3 grid is connected between voltage stabilizing diode D8-3 negative pole and resistance R 1-3, and source electrode is connected with diode D2-3 negative pole, light emitting diode D3-3 negative pole and capacitor C 2-3 negative pole respectively, and drain electrode is connected with battery cathode by resistance R 5-3;
Described anode respectively, resistance R 3-3 one end anodal with capacitor C 2-3 is connected with resistance R 4-3 one end, the described resistance R 3-3 other end is connected with light emitting diode D3-3 is anodal, the described resistance R 4-3 other end is connected with light emitting diode D4-3 is anodal, and described light emitting diode D4-3 negative pole is connected with diode D2-3 is anodal;
When device enters in hyperbaric environment, voltage conversion circuit converts alternating voltage to DC voltage, through resistance, drives field effect transistor V1-3 conducting, makes light emitting diode D3-3, D4-3 luminous, and can be by alarm delay circuit delayed alarm.
Described battery is direct supply or ultracapacitor.
Described conducting ring consists of elasticity or flexible material.
Described conducting ring consists of elasticity or flexible material.
Compared with prior art, it is low that the present invention has overcome the sensitivity of conventional high-tension AC current detector, the shortcoming that easily tripping is done, possesses high sensitivity, can send alarm approaching while having electric equipment: unique FET switch circuit coordinates with voltage conversion circuit makes it to have possessed the performance that can indicate respectively induced voltage and system voltage, while circuit very simply, failure rate greatly reduces; The present invention is not when using, and power consumption is zero, and battery significantly improves, and has overcome the too fast problem of prior art battery consumption.The present invention has significantly improved reliability and the ease for use of prior art, can effectively promote security and the convenience of high voltage testing operation.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention:
Fig. 2 is the circuit diagram of first embodiment of the invention;
Fig. 3 is the circuit diagram of second embodiment of the invention:
Fig. 4 is the circuit diagram of third embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1
Referring to accompanying drawing 1 and Fig. 2, this is the circuit diagram of first embodiment of the invention.High-voltage AC electroscope, for high-voltage alternating wireline inspection, can contact high-voltage alternating circuit just can report to the police, described electroscope comprises housing and is arranged on the interior electroscopic device A of housing 5, the metal that is arranged on housing top emits 9, be successively set on the conducting ring 6 of housing one side, insulating bar 10 and operating grip 11, described operating grip 11 is connected with housing 5 by insulating bar 10, described electroscopic device A comprises battery 1, it is characterized in that, described electroscopic device A also comprises voltage conversion circuit 2, FET switch circuit 3 and signal indicating circuit 4, described voltage conversion circuit 2 input end one end emit 9 to be connected with metal, the other end is connected with conducting ring 6, described FET switch circuit 3 respectively with battery 1, voltage conversion circuit 2 is connected with signal indicating circuit 4, described battery 1 is connected with signal indicating circuit 4.
The voltage conversion circuit 2 of the present embodiment comprises rectifier bridge D1, flat wave capacitor C, resistance R 1, resistance R 2, described FET switch circuit 3 comprises field effect transistor V1, V2, described signal indicating circuit 4 comprises light emitting diode D3, D4, current-limiting resistance R3, R4 and the hummer B in parallel with resistance R 4, in parallel with hummer B after described light emitting diode D3 connects with current-limiting resistance R3, described light emitting diode D4 connects with current-limiting resistance R4; Described rectifier bridge D1 input end is used for responding to AC field, output terminal is connected on flat wave capacitor C two ends in order to filtering, after described resistance R 1, resistance R 2 series connection, be connected in parallel on flat wave capacitor C two ends: the source electrode of described field effect transistor V1 is connected with the negative pole of light emitting diode D3, grid is connected between resistance R 1, resistance R 2, drain electrode is connected with battery 1 negative pole: the source electrode of described field effect transistor V2 is connected with the negative pole of light emitting diode D4, grid is connected between the peaceful ripple capacitor C of resistance R 1, and drain electrode is connected with battery 1 negative pole; Described battery 1 positive pole is respectively by being connected with the positive pole of light emitting diode D3, D4 after current-limiting resistance R3, R4.
The ac input end of rectifier bridge is exactly the signal input part of voltage conversion circuit 2, these two ends are unsettled, be used for responding to AC field, when electroscope is inserted in the AC field of certain electric potential difference, rectifier bridge D1 can be just DC voltage by this AC field voltage transformation, pass through after the smothing filtering of flat wave capacitor C, and directly export on a road, export after resistance R 1, resistance R 2 dividing potential drops on another road.The FET switch circuit 3 of the present embodiment consists of two field effect transistor, the grid of field effect transistor is the signal input part of this on-off circuit, field effect transistor V1, the grid of V2 is connected with two output terminals of voltage conversion circuit 2 respectively, when electroscope is inserted after AC field, because field effect transistor input impedance is high, therefore as long as electroscope approaches charging equipment, even if do not contact, the grid of two field effect transistor also can obtain enough DC voltage, when DC voltage surpasses after cut-in voltage threshold value, field effect transistor is conducting, there is high sensitivity, customer service prior art sensitivity low, must contact and have electric equipment, not by evenly locating through electric fields such as grading rings, the defect that could reliably indicate, the drain electrode of the field effect transistor of the present embodiment is the output terminal of on-off circuit, and they are connected with two groups of light emitting diode D4, D3 of signal indicating circuit 4 respectively, and after field effect transistor conducting, corresponding light emitting diode is luminous, and indicating equipment is charged.Dividing potential drop effect due to resistance R 1, resistance R 2, the operation voltage of two field effect transistor is differed greatly, for example, when AC field voltage reaches 5V, field effect transistor V1 is conducting, just conducting of V2 when AC field voltage reaches tens volts, and this just makes the present invention possess the ability of indicating respectively induced voltage and system voltage, when equipment is during with system voltage, the equal conducting of field effect transistor V1, V2, two groups of light emitting diode D4, D3 are luminous, and indicating equipment is with system voltage; When equipment belt has induced voltage, field effect transistor V1 conducting, V2 cut-off, light emitting diode D3 is luminous, and indicating equipment is with induced voltage, without system voltage; When the complete nothing electricity of equipment, because the present invention uses FET switch circuit, during its being on the scene effect pipe cut-off, drain current is almost nil, this just makes this circuit stand-by power consumption when not working is zero, thereby overcome traditional product, use digital integrated circuit stand-by power consumption to be difficult to the problem reducing, significantly extended battery life.Reliability also and meet a hummer B, for the alarm of sounding, is further improved in the light emitting diode D4 two ends of the present embodiment.Resistance R 3, R4 are used for to light emitting diode current limliting, and assurance light emitting diode is normally worked.
Referring to accompanying drawing 1, this is the contour structures schematic diagram of the present embodiment, and it comprises a conducting ring 6, and conducting ring 6 is positioned at a side of housing 5, and be connected with the signal input part of voltage conversion circuit 2, conducting ring 6 consists of the elasticity such as conductive rubber, metal net or flexible material.In addition the present embodiment is also provided with a metal cap 9, and this metal cap is connected with the other end of voltage conversion circuit 2 signal input parts.Insulating bar 1O and operating grip 11 are a kind of electric power operation apparatus, can be combined into one and operate for electrical verification with the present embodiment.Minority power equipment is after having a power failure completely, even if there is not induced voltage, the high direct voltage that also can exist residual charge to cause, power cable for example, power capacitor, the AC current detector of prior art cannot be verified DC voltage, with regard to making, for the electrical verification of this kind equipment, there is function blind area in this, the conducting ring that the present embodiment forms by resilient material is set, just can be conveniently used for Authentication devices and whether have high direct voltage, only need to be by an exit of metal cap 9 contact electrification equipment during use, conducting ring contacts another exit, when there is high direct voltage between two exits, this voltage will be added to by voltage conversion circuit 2 signal input part of FET switch circuit 3, play the effect that detects high direct voltage, cause for this reason conducting ring is that elasticity or flexible material can be out of shape, therefore can contact with the equipment of variety classes size easily, use very convenient.
The ingenious FET switch circuit that utilized of the present embodiment coordinates with voltage conversion circuit, and circuit is extremely simple, thereby reliability is high, and the present embodiment has been realized the galvanoscopic performance of conventional AC that surpasses far away with extremely simple circuit.The present embodiment principle is simple; this neighborhood technician can do suitable improvement completely on the basis of the present embodiment; such as light emitting diode, adopt different colors or use from sudden strain of a muscle type light emitting diode, hummer to adopt active generating device, conducting ring to take different shapes or material etc., this should all belong to protection scope of the present invention.
Embodiment 2
Referring to accompanying drawing 3, this is the circuit diagram of second embodiment of the invention, comprises battery 1, signal indicating circuit 4, voltage conversion circuit 2 and FET switch circuit 3; The signal input part of voltage conversion circuit 2 is unsettled, and the signal output part of this voltage conversion circuit 2 is connected with the signal input part of FET switch circuit 3, between the output terminal serial connection and signal indicating circuit 4 and battery 1 of FET switch circuit 3.It also comprises alarm delay circuit 7, and alarm delay circuit 7 is in parallel with the signal input part of FET switch circuit 3: a self-checking circuit 8, this self-checking circuit 8 is connected between the signal input part of battery 1 and FET switch circuit 3.
The voltage conversion circuit 2 of the present embodiment comprises diode D1-2, D2-2 and alarm delay circuit 7, divider resistance R1-2, R2-2 and voltage stabilizing diode D8, described alarm delay circuit 7 comprises capacitor C 1, the C2 of series connection, described FET switch circuit 3 comprises field effect transistor V1-2, V2-2, described signal indicating circuit 4 comprises light emitting diode D3-2, D4-2 in parallel, the resistance R 3-2 connecting with light emitting diode D3-2 and the hummer B-2 connecting with light emitting diode D4-2, described self-checking circuit 8 comprises diode D5, D6 and pushbutton switch SA; After described diode D1-2, D2-2 series connection, and be all connected in parallel on alarm delay circuit 7 two ends after divider resistance R1-2, R2-2 series connection, described voltage stabilizing diode D8 is anodal to be connected with the positive pole of diode D2-2, and described voltage stabilizing diode D8 negative pole is connected with the negative pole of diode D1-2; The grid of described field effect transistor V1-2 is connected between divider resistance R1-2, R2-2, is connected with diode D6 negative pole simultaneously, and source electrode is connected with light emitting diode D4-2 negative pole, and drain electrode is connected with battery 1 negative pole; The grid of described field effect transistor V2-2 is connected between divider resistance R1-2 and voltage stabilizing diode D8 negative pole, is connected with diode D5 negative pole simultaneously, and source electrode is connected with light emitting diode D3-2 negative pole, and drain electrode is connected with battery 1 negative pole; Described pushbutton switch SA one end is connected with diode D6 is anodal with diode D5 is anodal respectively, and the other end is connected with battery 1 is anodal; Described battery 1 positive pole is connected with resistance R 3-2 with hummer B-2 respectively; When device enters in hyperbaric environment, voltage conversion circuit 2 converts alternating voltage to DC voltage, through divider resistance R1-2, R2-2 dividing potential drop, drive respectively field effect transistor V1-2, V2-2 conducting, the luminous and hummer B-2 buzzing of light emitting diode D3-2, D4-2 is reported to the police.
Between described divider resistance R1-2 and diode D5 negative pole, be provided with bidirectional trigger diode D7, in order to improve the switch performance of diode D5, half conduction problem when eliminating it and approaching voltage threshold value.
Alarm delay circuit 7 is by capacitor C1, capacitor C2 forms, this circuit and diode D1-2, D2-2 forms voltage doubling rectifing circuit, both the effect that to have had AC field voltage transformation be DC voltage, there is again time delay maintenance effect, after AC field loses due to the effect that maintains of capacitor, make the signal output part of voltage conversion circuit still can maintain the direct voltage output of several seconds, even if electroscope is stretched into the electric field dead band of electric equipment fast like this, as grading ring, when voltage equalizing ball is inner, time delay maintenance effect due to this alarm delay circuit, electroscope still can start and the alarm several seconds moment before stretching into, prompting personnel note, even the present embodiment misoperation, as stretch into should not be inner as the grading ring of electrical verification point, also effectively alarm, further promoted overall sensitivity of the present invention.Voltage stabilizing diode D8, for to output voltage amplitude limit, prevents the excessive field effect transistor that punctures of voltage of electric field.The still minute two-way output after resistance R 1-2, resistance R 2-2 dividing potential drop of the signal output part of the present embodiment voltage conversion circuit 2.The FET switch circuit 3 of the present embodiment consists of two field effect transistor equally, the grid of field effect transistor is the signal input part of this on-off circuit, the grid of field effect transistor V1-2, V2-2 is connected with two output terminals of voltage conversion circuit 2 respectively, the drain electrode of the field effect transistor of the present embodiment is the output terminal of on-off circuit equally, and its principle of work is identical with embodiment mono-with beneficial effect.Between the signal output part of the grid of the field effect transistor V2-2 of the present embodiment and voltage conversion circuit 2, also string has diac D7, can further improve like this its switch performance, make voltage of electric field surpass the grid that is added to again field effect transistor V2-2 after threshold value after breakdown triggering diode D7, half conduction problem when eliminating it and approaching voltage threshold value.In addition the hummer B of the present embodiment connects with light emitting diode D4-2, can save like this current-limiting resistance, and can make light emitting diode D4-2 can follow hummer intermittence toot cry and glimmer, promote the eye-catching degree of indication.
Whether the self-checking circuit 8 of the present embodiment is comprised of pushbutton switch SA, diode D5, diode D6, for using front detection electroscope self good.After pressing the button switch S A, the voltage of battery 1 is added to the grid of field effect transistor V1-2, field effect transistor V2-2 by diode D5, diode D6, two field effect transistor conductings, two light emitting diodes, hummers of signal indicating circuit 4 send sound and light alarm, show that electroscope function is normal.When battery electric quantity deficiency, signal indicating circuit fault or FET switch circuit fault, all can find in time by this self-checking circuit, avoid operating hidden danger, further promoted reliability of the present invention.Certainly this self-checking circuit also can be changed, for example, with double-contact pushbutton switch, replace diode D5, diode D6 etc.
Embodiment 3
Referring to accompanying drawing 4, this is the circuit diagram of third embodiment of the invention.Comprise battery 1, signal indicating circuit 4, voltage conversion circuit 2 and FET switch circuit 3; The signal input part of voltage conversion circuit 2 is unsettled, and the signal output part of this voltage conversion circuit 2 is connected with the signal input part of FET switch circuit 3, between the output terminal serial connection and signal indicating circuit 4 and battery 1 of FET switch circuit 3.It also comprises alarm delay circuit 9, and alarm delay circuit 9 is in parallel with signal indicating circuit 4.
The voltage conversion circuit 2 of the present embodiment is comprised of diode D1-3, resistance R 1-3, voltage stabilizing diode D8, equally for the effect that is DC voltage by AC field voltage transformation, the present embodiment utilizes the nonlinear characteristic of voltage stabilizing diode D8 under little current conditions, the AC field voltage transformation that extraneous amplitude of variation is larger is the DC voltage that amplitude of variation is very little, then transports to FET switch circuit 3.The FET switch circuit 3 of the present embodiment only has a field effect transistor V1-3, and the source electrode of this field effect transistor is connected to negative feedback resistor R5-3, so just can be under the cooperation of voltage conversion circuit 2, in larger scope work in linear magnifying state.The signal indicating circuit 4 of the present embodiment is comprised of two groups of light emitting diode D3-3, D4-3 and corresponding current-limiting resistance R3-3, R4-3 too, light emitting diode D4-3 is also in series with diode D2-3 in addition, like this due to the forward voltage drop of D2-3, after field effect transistor V1-3 conducting during in linear magnifying state, because its drain current is less, now only have light emitting diode D3-3 luminous, after field effect transistor V1-3 saturation conduction, light emitting diode D3-3 and D4-3 are luminous, so also can realize satisfactorily the function of indicating respectively induced voltage and system voltage.The present embodiment, by by the larger linear magnification region of FET switch circuit setting, has saved a field effect transistor in the situation that function is identical, has further reduced cost.The alarm delay circuit 9 of the present embodiment is comprised of capacitor C2-3, this Parallel-connected Capacitor is in the two ends of signal indicating circuit 4, because the voltage of capacitor maintains effect, even if electroscope is stretched into the electric field dead band of electric equipment fast, during as grading ring, voltage equalizing ball inside, electroscope still can start and the alarm several seconds moment before stretching into, prompting personnel note, even the present embodiment misoperation, as stretch into should not be inner as the grading ring of electrical verification point, also effectively alarm, has further promoted overall sensitivity of the present invention.
In addition, the battery 1 of the present embodiment is replaced by ultracapacitor, as long as regularly to ultracapacitor charging, just can remove battery from, further improves the convenience using like this.
Should be noted that, the above embodiments are all that for example the present invention both can be connected as a single entity with control lever, also can design separately for the present invention rather than restriction the present invention are described; FET switch circuit also can adopt other insulated gate three terminal devices such as technotron or igbt; Diac can be replaced by gas-discharge tube or neon lamp; Voltage stabilizing diode can be replaced by voltage dependent resistor (VDR); Unsettled voltage conversion circuit signal input part can connect probe, probe, housing shroud layer etc.; Battery can be replaced by ultracapacitor or chargeable battery; Signal indicating circuit can replace with acousto-optic integrated pilot lamp, etc.Obviously; many technical characterictics in different embodiments of the invention are interchangeable or omit; the setting of many elements can change as required, and " " before element of the present invention or " one " do not get rid of and occurs a plurality of this elements, and these variations all should belong to protection scope of the present invention.
Claims (7)
1. a high-voltage AC electroscope, for high-voltage alternating wireline inspection, can contact high-voltage alternating circuit just can report to the police, described electroscope comprises housing and is arranged on the interior electroscopic device of housing (5) (A), the metal that is arranged on housing top emits (9), be successively set on the conducting ring (6) of housing one side, insulating bar (10) and operating grip (11), described operating grip (11) is connected with housing (5) by insulating bar (10), described electroscopic device (A) comprises battery (1), it is characterized in that, described electroscopic device (A) also comprises voltage conversion circuit (2), FET switch circuit (3) and signal indicating circuit (4), described voltage conversion circuit (2) input end one end emits (9) to be connected with metal, the other end is connected with conducting ring (6), described FET switch circuit (3) respectively with battery (1), voltage conversion circuit (2) is connected with signal indicating circuit (4), described battery (1) is connected with signal indicating circuit (4).
2. a kind of high-voltage AC electroscope according to claim 1, it is characterized in that, described voltage conversion circuit (2) comprises rectifier bridge D1, flat wave capacitor C, resistance R 1, resistance R 2, described FET switch circuit (3) comprises field effect transistor V1, V2, described signal indicating circuit (4) comprises light emitting diode D3, D4, current-limiting resistance R3, R4 and the hummer B in parallel with resistance R 4, in parallel with hummer B after described light emitting diode D3 connects with current-limiting resistance R3, described light emitting diode D4 connects with current-limiting resistance R4;
Described rectifier bridge D1 input end is used for responding to AC field, and output terminal is connected on flat wave capacitor C two ends in order to filtering, after described resistance R 1, resistance R 2 series connection, is connected in parallel on flat wave capacitor C two ends;
The source electrode of described field effect transistor V1 is connected with the negative pole of light emitting diode D3, and grid is connected between resistance R 1, resistance R 2, and drain electrode is connected with battery (1) negative pole;
The source electrode of described field effect transistor V2 is connected with the negative pole of light emitting diode D4, and grid is connected between the peaceful ripple capacitor C of resistance R 1, and drain electrode is connected with battery (1) negative pole:
Described battery (1) is anodal respectively by being connected with the positive pole of light emitting diode D3, D4 after current-limiting resistance R3, R4;
When device enters in hyperbaric environment, voltage conversion circuit (2) converts alternating voltage to DC voltage, through resistance R 1 and resistance R 2 dividing potential drops, drive respectively field effect transistor V1, V2 conducting, the luminous and hummer B buzzing of light emitting diode D3, D4 is reported to the police.
3. a kind of high-voltage AC electroscope according to claim 1, it is characterized in that, described electroscopic device (A) also comprises self-checking circuit (8), described voltage conversion circuit (2) comprises diode D1-2, D2-2 and alarm delay circuit (7), divider resistance R1-2, R2-2 and voltage stabilizing diode D8, described alarm delay circuit (7) comprises the capacitor C 1 of series connection, C2, described FET switch circuit (3) comprises field effect transistor V1-2, V2-2, described signal indicating circuit (4) comprises light emitting diode D3-2 in parallel, D4-2, the resistance R 3-2 connecting with light emitting diode D3-2 and the hummer B-2 connecting with light emitting diode D4-2, described self-checking circuit (8) comprises diode D5, D6 and pushbutton switch SA:
After described diode D1-2, D2-2 series connection, and be all connected in parallel on alarm delay circuit (7) two ends after divider resistance R1-2, R2-2 series connection, described voltage stabilizing diode D8 is anodal to be connected with the positive pole of diode D2-2, and described voltage stabilizing diode D8 negative pole is connected with the negative pole of diode D1-2:
The grid of described field effect transistor V1-2 is connected between divider resistance R1-2, R2-2, is connected with diode D6 negative pole simultaneously, and source electrode is connected with light emitting diode D4-2 negative pole, and drain electrode is connected with battery (1) negative pole;
The grid of described field effect transistor V2-2 is connected between divider resistance R1-2 and voltage stabilizing diode D8 negative pole, is connected with diode D5 negative pole simultaneously, and source electrode is connected with light emitting diode D3-2 negative pole, and drain electrode is connected with battery (1) negative pole:
Described pushbutton switch SA one end is connected with diode D6 is anodal with diode D5 is anodal respectively, and the other end is connected with battery (1) is anodal;
Described battery (1) positive pole is connected with resistance R 3-2 with hummer B-2 respectively;
When device enters in hyperbaric environment, voltage conversion circuit (2) converts alternating voltage to DC voltage, through divider resistance R1-2, R2-2 dividing potential drop, drive respectively field effect transistor V1-2, V2-2 conducting, the luminous and hummer B-2 buzzing of light emitting diode D3-2, D4-2 is reported to the police.
4. a kind of high-voltage AC electroscope according to claim 3, it is characterized in that, between described divider resistance R1-2 and diode D5 negative pole, be provided with bidirectional trigger diode D7, in order to improve the switch performance of diode D5, half conduction problem when eliminating it and approaching voltage threshold value.
5. a kind of high-voltage AC electroscope according to claim 1, it is characterized in that, described electroscopic device (A) also comprises alarm delay circuit (9), described alarm delay circuit (9) comprises the capacitor C 2-3 in parallel with signal indicating circuit (4), described voltage conversion circuit (2) comprises diode D1-3, capacitor C 1-3, resistance R 1-3 and voltage stabilizing diode D8-3, described FET switch circuit (3) comprises field effect transistor V1-3 and resistance R 5-3, described signal indicating circuit (4) comprises resistance R 4-3, light emitting diode D4-3, diode D2-3, resistance R 3-3 and light emitting diode D3-3,
Described diode D1-3 is connected in parallel on capacitor C 1-3 two ends, after described resistance R 1-3 and voltage stabilizing diode D8-3 series connection, is connected in parallel on capacitor C 1-3 two ends, and described voltage stabilizing diode D8-3 negative pole is connected with resistance R 1-3, and positive pole is connected with diode D1-3 is anodal;
Described field effect transistor V1-3 grid is connected between voltage stabilizing diode D8-3 negative pole and resistance R 1-3, source electrode is connected with diode D2-3 negative pole, light emitting diode D3-3 negative pole and capacitor C 2-3 negative pole respectively, and drain electrode is connected with battery (1) negative pole by resistance R 5-3;
Described battery (1) positive pole respectively, resistance R 3-3 one end anodal with capacitor C 2-3 is connected with resistance R 4-3 one end, the described resistance R 3-3 other end is connected with light emitting diode D3-3 is anodal, the described resistance R 4-3 other end is connected with light emitting diode D4-3 is anodal, and described light emitting diode D4-3 negative pole is connected with diode D2-3 is anodal:
When device enters in hyperbaric environment, voltage conversion circuit (2) converts alternating voltage to DC voltage, through resistance, drive field effect transistor V1-3 conducting, make light emitting diode D3-3, D4-3 luminous, and can be by alarm delay circuit (9) delayed alarm.
6. a kind of high-voltage AC electroscope according to claim 1, is characterized in that, described battery (1) is direct supply or ultracapacitor.
7. a kind of high-voltage AC electroscope according to claim 1, is characterized in that, described conducting ring (6) consists of elasticity or flexible material.
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| CN201410194149.8A CN103954826A (en) | 2014-05-09 | 2014-05-09 | High-voltage alternating-current electroscope |
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| CN201410194149.8A CN103954826A (en) | 2014-05-09 | 2014-05-09 | High-voltage alternating-current electroscope |
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| CN105004906A (en) * | 2015-07-07 | 2015-10-28 | 国网上海市电力公司 | Contact-type alternating-current high-voltage electroscope and application thereof |
| CN107643435A (en) * | 2017-10-31 | 2018-01-30 | 现代重工(中国)电气有限公司 | Differential protection cable socket and the Current Mutual Inductance circuit protection device being made from it |
| CN108398591A (en) * | 2018-05-14 | 2018-08-14 | 河北亚润电力器具有限公司 | All-loop self-inspection electroscope |
| CN109406836A (en) * | 2018-10-29 | 2019-03-01 | 广东电网有限责任公司 | A kind of continuous contact type acoustooptical electroscope |
| CN110058072A (en) * | 2018-01-18 | 2019-07-26 | 元壤实业（上海）有限公司 | A kind of electroscope with contact detection |
| CN111983336A (en) * | 2020-09-02 | 2020-11-24 | 王保巨 | Discharge indicator arranged on high-voltage discharge rod |
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| CN111983336A (en) * | 2020-09-02 | 2020-11-24 | 王保巨 | Discharge indicator arranged on high-voltage discharge rod |
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