CN203217713U - Equipotential high voltage electrification display and living body approach alarm circuit and device thereof - Google Patents
Equipotential high voltage electrification display and living body approach alarm circuit and device thereof Download PDFInfo
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- CN203217713U CN203217713U CN 201320099087 CN201320099087U CN203217713U CN 203217713 U CN203217713 U CN 203217713U CN 201320099087 CN201320099087 CN 201320099087 CN 201320099087 U CN201320099087 U CN 201320099087U CN 203217713 U CN203217713 U CN 203217713U
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Abstract
The utility model relates to the high voltage electric engineering technology field and specifically relates to an equipotential high voltage electrification display and living body approach alarm circuit and a device thereof. The equipotential high voltage electrification display and living body approach alarm circuit comprises an induction voltage receiving circuit (3), a rectification circuit (4), a charge and discharge oscillation circuit (5), an illumination circuit (6), a sensor circuit (7), a signal amplification circuit (8) and a sound alarm circuit (9), wherein the induction voltage receiving circuit (3), the rectification circuit (4), the charge and discharge oscillation circuit (5), the illumination circuit (6), the sensor circuit (7), the signal amplification circuit (8) and the sound alarm circuit (9) are connected orderly. The effects of the equipotential high voltage electrification display and living body approach alarm circuit and the device thereof are that the equipotential high voltage electrification display and living body approach alarm device is simple in structure ad is small in size, the device can be directly mounted on a high voltage power transmission and distribution device at short range, and the device can work normally without a special purpose power source; the device has an equipotential high voltage electrification display function and a living body approach alarm function, and action for fulfilling the functions is reliable; and the safety factor of a high voltage device overhaul is greatly improved, and hidden safety danger of overhaul personnel is reduced.
Description
Technical field
The utility model relates to the high-tension electricity field of engineering technology, is specifically related to circuit and the device thereof of a kind of equipotential electrification in high voltage demonstration and live body proximity sensing.
Background technology
In electric system, in high-tension switch cabinet, ring main unit, high-tension line, often use high voltage display device to finish major loop and whether have the indication of high-tension electricity, the locking of relevant device, ensure safety, prevent maloperation as operation with in safeguarding, prevent a technological means of mistakenly entering charged chamber, it is extremely important that high voltage display device seems.At present, high voltage display device mainly contains contact high voltage display device and the charged display device of induction-type high-voltage.Though the contact high voltage display device does not have the phase mutual interference between the three-phase electric field, sensor is longer to the line of display unit, introduces extra interference easily.The charged display device of induction-type high-voltage all adopt inductosyn that the electric field change around the installation site is all compared sensitivity, can not be installed in the movable very near place of metal parts of distance, metal that must be all can not block the sensor unit of the charged display device of induction-type high-voltage or shield.
The utility model content
The purpose of this utility model is to provide a kind of equipotential electrification in high voltage to show circuit and device thereof with the live body proximity sensing, solves at present the device that whether has a high-tension electricity for detection of high-tension switch cabinet, ring main unit, high-tension line etc. and grows existing extra interference and blocked by Confucian classics article on every side easily or the problem of shield sensor unit because installing line own easily.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of equipotential electrification in high voltage shows the circuit with the live body proximity sensing, comprises the induced voltage receiving circuit, the rectification circuit that connect in turn, discharges and recharges oscillating circuit, illuminating circuit, sensor circuit, signal amplification circuit and sound warning circuit, wherein
Described induced voltage receiving circuit mainly is to be made of induction electrode I, induction electrode II, stabilivolt DW1 and stabilivolt DW2,
Described rectification circuit mainly is made of bridge rectifier, capacitor C 1, diode D1 and resistance R 1,
The described oscillating circuit that discharges and recharges mainly is made of capacitor C 2 and Diac DB1,
Described illuminating circuit mainly is made of LED and stabilivolt DW3,
Described sensor circuit mainly is made of induced electricity pole piece A, junction field effect transistor VF, capacitor C 3, adjustable resistance R2, divider resistance R3 and adjustable resistance R4,
Described signal amplification circuit mainly is made of time-base integrated circuit ICl, language integrated circuit (IC) 2 and capacitor C 4, resistance R 5 and adjustable resistance R6,
Described audible alarm circuit mainly is made of loudspeaker BL and NPN transistor V.
Further technical scheme is to be connected in parallel on two input ends of bridge rectifier after above-mentioned stabilivolt DW1 and the stabilivolt DW2 differential concatenation, induction electrode is connected between the input end of stabilivolt DW1 and bridge rectifier, one end of induction electrode II is connected between another input end of stabilivolt DW2 and bridge rectifier, an output terminal of described bridge rectifier is connected with an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of diode D1, capacitor C 1 is connected in parallel on two output terminals of bridge rectifier, one end of capacitor C 2 and the positive pole of Diac DB1 are connected on the negative pole of diode D1, the other end of capacitor C 2 links to each other with another output terminal of bridge rectifier, the negative pole of described stabilivolt DW3 links to each other with Diac DB1 negative pole, the positive pole of stabilivolt DW3 links to each other with another output terminal of bridge rectifier, LED and stabilivolt DW3 are in parallel, described capacitor C 3, adjustable resistance R2, divider resistance R3, it is in parallel with stabilivolt DW3 after junction field effect transistor VF and adjustable resistance R4 connect successively, described induced electricity pole piece A is connected on the trigger end of junction field effect transistor VF, described time-base integrated circuit ICl has 8 pins, wherein 1 pin of time-base integrated circuit ICl is connected on another output terminal of bridge rectifier, also link to each other with another output terminal of bridge rectifier behind the 5 pin series capacitance C4 of time-base integrated circuit ICl, 2 pin of time-base integrated circuit ICl are connected between junction field effect transistor VF and the adjustable resistance R4,4 pin of time-base integrated circuit ICl and 8 pin all are connected between adjustable resistance R2 and the divider resistance R3, described language integrated circuit (IC) 2 has 4 pins, wherein 1 pin of language integrated circuit (IC) 2 links to each other with another output terminal of bridge rectifier, link to each other with 3 pin of time-base integrated circuit ICl behind the 2 pin series connection adjustable resistance R6 of language integrated circuit (IC) 2, be connected between adjustable resistance R2 and the divider resistance R3 behind the 3 pin resistance in series R5 of language integrated circuit (IC) 2,4 pin of language integrated circuit (IC) 2 link to each other with the base stage of NPN transistor V, NPN transistor V collector series connection loudspeaker BL after be connected between adjustable resistance R2 and the divider resistance R3, the emitter of NPN transistor V is connected on another output terminal of bridge rectifier.
A kind of equipotential electrification in high voltage shows and live body proximity sensing device, the circuit of above-mentioned a kind of equipotential electrification in high voltage demonstration with live body proximity sensing is installed in it, comprise columnar insulation box body and display panel, display panel is installed in the insulation box body, induced electricity pole piece A is arranged in the display panel, loudspeaker BL is installed in the general headquarters of induced electricity pole piece A, and the middle part of loudspeaker BL is equipped with light emitting diode LED.
Further technical scheme is on the above-mentioned insulation box body connection support to be arranged fixedly, connects on the support to be connected with for the retract bolt that whole device is fixed on the high pressure equipment for power transmission and distribution.
Further technical scheme is that above-mentioned retract bolt is made of support portion, inner bolt and outer bolt successively, and the external diameter of inner bolt is less than the external diameter of outer bolt and be enclosed within the screw that connects support.
Compared with prior art, the beneficial effects of the utility model are: simple in structure, small and exquisite, and can closely be directly installed on the high pressure equipment for power transmission and distribution, and need not to specialize in the operate as normal that power supply can be realized this device; This device has equipotential electrification in high voltage Presentation Function and live body proximity sensing function simultaneously, and the reliable in action that realizes: when high pressure equipment for power transmission and distribution charging operation, this device can pass through lumination of light emitting diode, thereby caution maintainer high pressure equipment for power transmission and distribution is charged, and in the time that maintainer and charged high-tension apparatus exceed certain safe distance, this device can send the voice signal of live body proximity sensing reliably, thereby it is charged to warn this high pressure primary equipment of maintainer again; Significantly improve the safety coefficient of high-tension apparatus maintenance, reduce maintainer's potential safety hazard.
Description of drawings
Fig. 1 is the circuit structure diagram of an embodiment of circuit of a kind of equipotential electrification in high voltage demonstration of the utility model and live body proximity sensing.
Fig. 2 is the partial circuit diagram that realizes charged Presentation Function among Fig. 1.
Fig. 3 is the partial circuit diagram that realizes live body proximity sensing function among Fig. 1.
Fig. 4 is the time-base integrated circuit ICl internal circuit diagram of NE555 type.
Fig. 5 is the time-base integrated circuit ICl pinouts of NE555 type.
Fig. 6 is the structural representation of a kind of equipotential electrification in high voltage demonstration of the utility model and an embodiment of live body proximity sensing device.
Fig. 7 is the link structural drawing of a kind of equipotential electrification in high voltage demonstration of the utility model shown in Figure 6 and an embodiment of live body proximity sensing device.
Fig. 8 is the structure side view of retract bolt among Fig. 7.
Fig. 9 is the structure vertical view of retract bolt among Fig. 7.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Fig. 1 shows an embodiment of the circuit of a kind of equipotential electrification in high voltage demonstration of the utility model and live body proximity sensing: a kind of equipotential electrification in high voltage shows the circuit with the live body proximity sensing, comprise in turn the induced voltage receiving circuit 3, the rectification circuit 4 that connect, discharge and recharge oscillating circuit 5, illuminating circuit 6, sensor circuit 7, signal amplification circuit 8 and sound warning circuit 9, wherein
Described induced voltage receiving circuit 3 mainly is to be made of induction electrode I, induction electrode II, stabilivolt DW1 and stabilivolt DW2,
Described rectification circuit 4 mainly is made of bridge rectifier, capacitor C 1, diode D1 and resistance R 1,
The described oscillating circuit 5 that discharges and recharges mainly is made of capacitor C 2 and Diac DB1,
Described illuminating circuit 6 mainly is made of LED and stabilivolt DW3,
Described sensor circuit 7 mainly is made of induced electricity pole piece A, junction field effect transistor VF, capacitor C 3, adjustable resistance R2, divider resistance R3 and adjustable resistance R4,
Described signal amplification circuit 8 mainly is made of time-base integrated circuit ICl, language integrated circuit (IC) 2 and capacitor C 4, resistance R 5 and adjustable resistance R6,
Described audible alarm circuit 9 mainly is made of loudspeaker BL and NPN transistor V.
According to the preferred embodiment of a kind of equipotential electrification in high voltage demonstration of the utility model with the circuit of live body proximity sensing, further technical scheme is to be connected in parallel on two input ends of bridge rectifier after above-mentioned stabilivolt DW1 and the stabilivolt DW2 differential concatenation, induction electrode is connected between the input end of stabilivolt DW1 and bridge rectifier, one end of induction electrode II is connected between another input end of stabilivolt DW2 and bridge rectifier, an output terminal of described bridge rectifier is connected with an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of diode D1, capacitor C 1 is connected in parallel on two output terminals of bridge rectifier, one end of capacitor C 2 and the positive pole of Diac DB1 are connected on the negative pole of diode D1, the other end of capacitor C 2 links to each other with another output terminal of bridge rectifier, the negative pole of described stabilivolt DW3 links to each other with Diac DB1 negative pole, the positive pole of stabilivolt DW3 links to each other with another output terminal of bridge rectifier, LED and stabilivolt DW3 are in parallel, described capacitor C 3, adjustable resistance R2, divider resistance R3, it is in parallel with stabilivolt DW3 after junction field effect transistor VF and adjustable resistance R4 connect successively, described induced electricity pole piece A is connected on the trigger end of junction field effect transistor VF, described time-base integrated circuit ICl has 8 pins, wherein 1 pin of time-base integrated circuit ICl is connected on another output terminal of bridge rectifier, also link to each other with another output terminal of bridge rectifier behind the 5 pin series capacitance C4 of time-base integrated circuit ICl, 2 pin of time-base integrated circuit ICl are connected between junction field effect transistor VF and the adjustable resistance R4,4 pin of time-base integrated circuit ICl and 8 pin all are connected between adjustable resistance R2 and the divider resistance R3, described language integrated circuit (IC) 2 has 4 pins, wherein 1 pin of language integrated circuit (IC) 2 links to each other with another output terminal of bridge rectifier, link to each other with 3 pin of time-base integrated circuit ICl behind the 2 pin series connection adjustable resistance R6 of language integrated circuit (IC) 2, be connected between adjustable resistance R2 and the divider resistance R3 behind the 3 pin resistance in series R5 of language integrated circuit (IC) 2,4 pin of language integrated circuit (IC) 2 link to each other with the base stage of NPN transistor V, NPN transistor V collector series connection loudspeaker BL after be connected between adjustable resistance R2 and the divider resistance R3, the emitter of NPN transistor V is connected on another output terminal of bridge rectifier.
Here it is worthy of note that the model of described time-base integrated circuit ICl is NE555, and the model of language integrated circuit (IC) 2 is NFC5212.
Presentation Function of the present utility model is to utilize the electrostatic induction principle, rely on high pressure primary equipment electric field on every side, enter the induced voltage receiving circuit by induction electrode I and induction electrode II, by stabilivolt DW1 and the stabilivolt DW2 that plays the high impedance attenuation, under the effect of bridge rectifier, alternating voltage is converted to DC voltage, voltage after the rectification is by discharging and recharging oscillating circuit to capacitor C 2 chargings, after being charged to certain voltage, offering LED, sensor circuit, signal amplification circuit and sound warning circuit again and make power supply.LED is realized charged demonstration; its principle of work is the electroluminescence principle of PN junction: after the diode electrode two ends add certain forward voltage; to there be a large amount of electronics to inject in the diode; high-energy electron on the PN junction conduction band and the hole on the valence band take place compound; and the form of unnecessary energy with light emitted; thereby reach the purpose of light-emitting caution; this LED passes through the stabilivolt DW3 of a reverse protection in parallel in circuit; be connected serially to noble potential with Diac DB1 then; the N level of LED links to each other with another output terminal of bridge rectifier (being the electronegative potential output terminal); constitute the displacement current loop, realize LED work.
As shown in Figure 3, sensor circuit 7 of the present utility model, signal amplification circuit 8 and sound warning circuit 9 are used for realizing live body proximity sensing function of the present utility model.Wherein, sensor circuit 7 is made of induced electricity pole piece A, junction field effect transistor VF, capacitor C 3, adjustable resistance R2, divider resistance R3 and adjustable resistance R4; Wherein, the back parallel connection of connecting with resistance R 3, junction field effect transistor VF and adjustable resistance R4 three again after capacitor C 3 and the adjustable resistance R2 series connection inserts major loop, and junction field effect transistor VF trigger end connection induced electricity pole piece A, an end are connected with resistance R 3, the other end is connected with adjustable resistance R4.Signal amplification circuit 8 is made of time-base integrated circuit ICl, language integrated circuit (IC) 2 and capacitor C 4, resistance R 5 and adjustable resistance R6; Wherein, as shown in Figure 4 and Figure 5, time-base integrated circuit ICl adopts NE555 type time-base integrated circuit, and language integrated circuit (IC) 2 adopts NFC5212 type language integrated circuit.Audible alarm circuit 9 is made of loudspeaker BL and transistor V.Live body proximity sensing principle of the present utility model: during near induced electricity pole piece A, drain electrode, the resistance between the source electrode of VF are less at nobody, and electric current is bigger, and the 2 pin current potentials of ICl are higher than Vcc/3, and this alarm is failure to actuate; As the people during near induced electricity pole piece A, the induced signal of human body can make the drain electrode of VF, the resistance value between the source electrode increase, the 2 pin current potentials of IC1 are lower than Vcc/3, circuit upset in the ICl, its 3 pin becomes high level by low level, the language integrated circuit is triggered and work, the speech signal of the 4 pin output of IC2 sends language prompting sound by loudspeaker BL after V amplifies; Regulate the resistance of R4 and R6, can change the sensitivity of circuit, made the people near in the induced electricity pole piece 0.5m, alarm equipment alarm.
Fig. 6 shows an embodiment of a kind of equipotential electrification in high voltage demonstration of the utility model and live body proximity sensing device, a kind of equipotential electrification in high voltage shows and live body proximity sensing device, the circuit of above-mentioned a kind of equipotential electrification in high voltage demonstration with live body proximity sensing is installed in it, comprise columnar insulation box body 1 and display panel 2, display panel 2 is installed in the insulation box body 1, induced electricity pole piece A12 is arranged in the display panel 2, loudspeaker BL14 is installed in the general headquarters of induced electricity pole piece A12, and the middle part of loudspeaker BL14 is equipped with light emitting diode LED13.
Fig. 6 shows a preferred embodiment of a kind of equipotential electrification in high voltage demonstration of the utility model and live body proximity sensing device, on the insulation box body 1 support 10 of connection is arranged fixedly, be connected with for the retract bolt 11 that whole device is fixed on the high pressure equipment for power transmission and distribution on the connection support 10.
Fig. 7, Fig. 8 and Fig. 9 show another preferred embodiment of a kind of equipotential electrification in high voltage demonstration of the utility model and live body proximity sensing device, retract bolt 11 is made of support portion 16, inner bolt 17 and outer bolt 18 successively, and the external diameter of inner bolt 17 is less than the external diameter of outer bolt 18 and be enclosed within the screw that connects support 10.When using this device, by retract bolt 11 this device directly is connected on the high pressure equipment for power transmission and distribution.When high pressure equipment for power transmission and distribution charging operation, this device can be luminous by LED, thereby caution maintainer high pressure equipment for power transmission and distribution is charged; And in the time that maintainer and charged high-tension apparatus exceed certain safe distance, this device can send the voice signal of live body proximity sensing reliably, thereby warns this high pressure primary equipment charging operation of maintainer again.In addition, the utility model adopts the power supply of high voltage induction electric field, and need not to specialize in power supply also can reliably working; Have, the utility model is small and exquisite again, and compact conformation is particularly suitable for the maintenance occasion of 35kV and following high-tension switch cabinet, switch yard primary equipment etc.
Claims (5)
1. an equipotential electrification in high voltage shows the circuit with the live body proximity sensing, it is characterized in that: comprise in turn the induced voltage receiving circuit (3), the rectification circuit (4) that connect, discharge and recharge oscillating circuit (5), illuminating circuit (6), sensor circuit (7), signal amplification circuit (8) and sound warning circuit (9), wherein
Described induced voltage receiving circuit (3) mainly is to be made of induction electrode I, induction electrode II, stabilivolt DW1 and stabilivolt DW2,
Described rectification circuit (4) mainly is made of bridge rectifier, capacitor C 1, diode D1 and resistance R 1,
The described oscillating circuit (5) that discharges and recharges mainly is made of capacitor C 2 and Diac DB1,
Described illuminating circuit (6) mainly is made of LED and stabilivolt DW3,
Described sensor circuit (7) mainly is made of induced electricity pole piece A, junction field effect transistor VF, capacitor C 3, adjustable resistance R2, divider resistance R3 and adjustable resistance R4,
Described signal amplification circuit (8) mainly is made of time-base integrated circuit ICl, language integrated circuit (IC) 2 and capacitor C 4, resistance R 5 and adjustable resistance R6,
Described audible alarm circuit (9) mainly is made of loudspeaker BL and NPN transistor V.
2. a kind of equipotential electrification in high voltage according to claim 1 shows the circuit with the live body proximity sensing, it is characterized in that: be connected in parallel on after described stabilivolt DW1 and the stabilivolt DW2 differential concatenation on two input ends of bridge rectifier, induction electrode is connected between the input end of stabilivolt DW1 and bridge rectifier, one end of induction electrode II is connected between another input end of stabilivolt DW2 and bridge rectifier, an output terminal of described bridge rectifier is connected with an end of resistance R 1, the other end of resistance R 1 links to each other with the positive pole of diode D1, capacitor C 1 is connected in parallel on two output terminals of bridge rectifier, one end of capacitor C 2 and the positive pole of Diac DB1 are connected on the negative pole of diode D1, the other end of capacitor C 2 links to each other with another output terminal of bridge rectifier, the negative pole of described stabilivolt DW3 links to each other with Diac DB1 negative pole, the positive pole of stabilivolt DW3 links to each other with another output terminal of bridge rectifier, LED and stabilivolt DW3 are in parallel, described capacitor C 3, adjustable resistance R2, divider resistance R3, it is in parallel with stabilivolt DW3 after junction field effect transistor VF and adjustable resistance R4 connect successively, described induced electricity pole piece A is connected on the trigger end of junction field effect transistor VF, described time-base integrated circuit ICl has 8 pins, wherein 1 pin of time-base integrated circuit ICl is connected on another output terminal of bridge rectifier, also link to each other with another output terminal of bridge rectifier behind the 5 pin series capacitance C4 of time-base integrated circuit ICl, 2 pin of time-base integrated circuit ICl are connected between junction field effect transistor VF and the adjustable resistance R4,4 pin of time-base integrated circuit ICl and 8 pin all are connected between adjustable resistance R2 and the divider resistance R3, described language integrated circuit (IC) 2 has 4 pins, wherein 1 pin of language integrated circuit (IC) 2 links to each other with another output terminal of bridge rectifier, link to each other with 3 pin of time-base integrated circuit ICl behind the 2 pin series connection adjustable resistance R6 of language integrated circuit (IC) 2, be connected between adjustable resistance R2 and the divider resistance R3 behind the 3 pin resistance in series R5 of language integrated circuit (IC) 2,4 pin of language integrated circuit (IC) 2 link to each other with the base stage of NPN transistor V, be connected between adjustable resistance R2 and the divider resistance R3 behind the collector series connection loudspeaker BL of NPN transistor V, the emitter of NPN transistor V is connected on another output terminal of bridge rectifier.
3. an equipotential electrification in high voltage shows and live body proximity sensing device, the circuit of a kind of equipotential electrification in high voltage demonstration as claimed in claim 1 or 2 and live body proximity sensing is installed in it, it is characterized in that: comprise columnar insulation box body (1) and display panel (2), display panel (2) is installed in the insulation box body (1), induced electricity pole piece A(12) is arranged in the display panel (2), loudspeaker BL(14) be installed in induced electricity pole piece A(12) general headquarters, and loudspeaker BL(14) the middle part light emitting diode LED(13 is installed).
4. a kind of equipotential electrification in high voltage according to claim 3 shows and live body proximity sensing device, it is characterized in that: described insulation box body (1) is gone up fixedly connection support (10), connects on the support (10) to be connected with for the retract bolt (11) that whole device is fixed on the high pressure equipment for power transmission and distribution.
5. a kind of equipotential electrification in high voltage according to claim 4 shows and live body proximity sensing device, it is characterized in that: described retract bolt (11) is made of support portion (16), inner bolt (17) and outer bolt (18) successively, and the external diameter of inner bolt (17) is less than the external diameter of outer bolt (18) and be enclosed within the screw that connects support (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320099087 CN203217713U (en) | 2013-03-05 | 2013-03-05 | Equipotential high voltage electrification display and living body approach alarm circuit and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320099087 CN203217713U (en) | 2013-03-05 | 2013-03-05 | Equipotential high voltage electrification display and living body approach alarm circuit and device thereof |
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| CN203217713U true CN203217713U (en) | 2013-09-25 |
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| CN 201320099087 Expired - Lifetime CN203217713U (en) | 2013-03-05 | 2013-03-05 | Equipotential high voltage electrification display and living body approach alarm circuit and device thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198610A (en) * | 2013-03-05 | 2013-07-10 | 四川省电力公司达州电业局 | Circuit with equipotential high voltage electrified display and living body approach alarm and device thereof |
| CN104635022A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live indicating device with trigger protection function |
| CN106645900A (en) * | 2017-01-06 | 2017-05-10 | 四川埃姆克伺服科技有限公司 | IGBT saturation voltage drop detecting circuit |
-
2013
- 2013-03-05 CN CN 201320099087 patent/CN203217713U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198610A (en) * | 2013-03-05 | 2013-07-10 | 四川省电力公司达州电业局 | Circuit with equipotential high voltage electrified display and living body approach alarm and device thereof |
| CN103198610B (en) * | 2013-03-05 | 2015-12-09 | 四川省电力公司达州电业局 | The circuit of a kind of equipotential HV live displaying and live body proximity sensing and device thereof |
| CN104635022A (en) * | 2015-02-06 | 2015-05-20 | 四川蓝讯宝迩电子科技有限公司 | High-voltage live indicating device with trigger protection function |
| CN106645900A (en) * | 2017-01-06 | 2017-05-10 | 四川埃姆克伺服科技有限公司 | IGBT saturation voltage drop detecting circuit |
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Granted publication date: 20130925 |