CN212008733U

CN212008733U - Electricity testing circuit and electricity testing device

Info

Publication number: CN212008733U
Application number: CN202020524154.1U
Authority: CN
Inventors: 邓洁; 李飞; 徐颖; 常建军
Original assignee: Huizhou Jianggan Power Technology Co ltd
Current assignee: Huizhou Jianggan Power Technology Co ltd
Priority date: 2020-04-11
Filing date: 2020-04-11
Publication date: 2020-11-24
Anticipated expiration: 2030-04-11

Abstract

The utility model discloses an test electric circuit and test electric installation. The electricity testing circuit comprises a power supply unit, an electric signal acquisition unit, a main control unit and an electricity testing prompt unit, wherein the main control unit comprises a signal input end and a test result output end; the power supply unit is used for providing power supply for the electricity testing circuit; the electric signal acquisition unit is connected with the signal input end of the main control unit, converts an electric field signal into a voltage signal in a non-contact induction mode and then sends the voltage signal to the main control unit; the main control unit is connected with the electric signal acquisition unit through a signal input end, is connected with the electricity testing prompt unit through an inspection result output end, analyzes whether an object to be tested is electrified or not according to the voltage signal acquired by the electric signal acquisition unit, and triggers the electricity testing prompt unit to give an alarm when the object to be tested is judged to be electrified. The utility model discloses the scheme need not direct contact object to be measured can detect whether the object to be measured is electrified, and it is more convenient and safer to use.

Description

Electricity testing circuit and electricity testing device

Technical Field

The utility model relates to an electric power detects technical field, concretely relates to test electric circuit and test electric device.

Background

In an electric power system, when a power distribution network system is operated, maintained and fault-handled, in order to ensure the safety of operation, field operators often need an electroscope to verify whether a line is electrified or not so as to perform the next operation.

In the related art, whether the line is electrified or not is verified, and whether the line is electrified or not is detected by holding the electroscope with one hand of a worker to contact the line, so that the use is inconvenient.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an it tests electric circuit and tests electric device to need not direct contact to await measuring the object and can detect whether the object that awaits measuring is electrified, and it is more convenient and safer to use.

The utility model discloses an aspect provides an electricity test circuit:

the power supply comprises a power supply unit, an electric signal acquisition unit, a main control unit and an electricity testing prompt unit, wherein the main control unit comprises a signal input end and a test result output end;

the power supply unit is used for providing power supply for the electricity testing circuit;

the electric signal acquisition unit is connected with the signal input end of the main control unit, converts an electric field signal into a voltage signal in a non-contact induction mode and then sends the voltage signal to the main control unit;

the main control unit is connected with the electric signal acquisition unit through a signal input end, is connected with the electricity testing prompt unit through an inspection result output end, analyzes whether an object to be tested is electrified or not according to the voltage signal acquired by the electric signal acquisition unit, and triggers the electricity testing prompt unit to give an alarm when the object to be tested is judged to be electrified.

In an implementation mode, the electricity testing circuit further comprises a self-checking switch, wherein the self-checking switch is connected with a self-checking input end of the main control unit and triggers the electricity testing circuit to start self-checking.

In one embodiment, the electrical signal acquisition unit comprises at least: the probe is connected with the first resistor in series and connected with the second resistor in parallel and then connected to the main control unit, and the probe induces an alternating current electric field and then generates a divided voltage on the second resistor.

In one embodiment, the main control unit is provided with an ADC analog-to-digital converter for acquiring a voltage value generated by the second resistor in the electrical signal acquisition unit, and determines whether the object to be measured is charged according to an analysis result, wherein the analysis result is based on whether the continuously acquired voltage value variation analysis conforms to the ac characteristic.

In one embodiment, the electricity verification prompting unit further comprises a voice prompting module and/or a display module;

the voice prompt module is used for sending a sound alarm when the main control unit judges that the object to be detected is electrified;

the display module is used for giving a light alarm when the main control unit judges that the object to be detected is electrified.

In one embodiment, the voice prompt module includes a buzzer and a first triode, a first end of the buzzer is connected to a power supply, a second end of the buzzer is connected to a collector of the first triode, an emitter of the first triode is grounded, and a base of the first triode is connected in series with a resistor and then connected to one pin of the main control unit; or the like, or, alternatively,

the display module comprises a light-emitting diode group and a second triode, wherein the anode of the light-emitting diode group is connected with a power supply, the cathode of the light-emitting diode group is connected with the collector of the second triode, the emitter of the second triode is grounded, and the base of the second triode is connected with a resistor in series and then is connected to the other pin of the main control unit.

In one embodiment, the power supply unit is provided with a charge indicator light for displaying the charge status.

The utility model discloses another aspect provides an electricity testing device:

the electroscope is equipped with the circuit board, the circuit board includes foretell electroscope circuit.

In one embodiment, the electroscope comprises a main body and a transparent cover body, a closed cavity is formed between the main body and the transparent cover body, and the circuit board is arranged in the cavity.

In one embodiment, the electricity testing device is further provided with a buckle capable of clamping a circuit to be tested;

the clamping buckle comprises two connecting pieces fixedly arranged on the main body in parallel, clamping pieces are hinged to the connecting pieces, the clamping pieces on the two connecting pieces are arranged oppositely, and an elastic piece used for enabling the clamping pieces to elastically overturn is arranged between the clamping pieces and the connecting pieces.

Compared with the prior art, the utility model has the following advantages:

the embodiment of the utility model provides an electricity test circuit, including power supply unit, electric signal acquisition unit, main control unit, test the electric suggestion unit, the main control unit includes signal input part and inspection result output; the electric signal acquisition unit is connected with the signal input end of the main control unit, converts an electric field signal into a voltage signal in a non-contact induction mode and then sends the voltage signal to the main control unit; the main control unit is connected with the electric signal acquisition unit through a signal input end, is connected with the electricity testing prompt unit through an inspection result output end, analyzes whether an object to be tested is electrified or not according to the voltage signal acquired by the electric signal acquisition unit, and triggers the electricity testing prompt unit to give an alarm when the object to be tested is judged to be electrified. That is to say, the electric signal acquisition unit can be the near electric field of non-contact response object to be measured, and the main control unit can be according to follow the voltage signal analysis object that the electric signal acquisition unit obtained whether electrified, will test the electric result signal input to test the electric suggestion unit and report an emergency and ask for help or increased vigilance the result signal that will obtain through the analysis at last. After the arrangement, whether the object to be detected is electrified or not can be detected without directly contacting the object to be detected, such as a circuit to be detected, and an alarm is given, so that the device is more convenient and safer to use.

The embodiment of the utility model provides an electricity testing device is equipped with the circuit board, the circuit board includes foretell electricity testing circuit, consequently as long as install this electricity testing circuit's electricity testing device, can all realize not needing not direct contact to await measuring the object for example the circuit that awaits measuring can detect whether the object that awaits measuring is electrified to send out and report an emergency and ask for help or increased safety, it is more convenient and safer to use.

The embodiment of the utility model provides an electricity testing device can also be equipped with the buckle of the circuit that awaits measuring of centre gripping, more is fit for being applied to the scene that detects transmission line like this. The clamping buckle comprises two connecting pieces fixedly arranged on the main body in parallel, clamping pieces are hinged to the connecting pieces, the clamping pieces on the two connecting pieces are arranged oppositely, and an elastic piece used for enabling the clamping pieces to elastically turn is arranged between the clamping pieces and the connecting pieces. Like this, when the staff detects whether transmission line is electrified, can very conveniently will test electric installation card on the transmission line, need not just like correlation technique like the handheld electroscope of one hand only one hand can work again, just so can liberate both hands and all can maintain various operations such as, more convenient also safer.

The embodiment of the utility model provides an electricity testing device tests electric installation and includes the main part and the translucent cover body, the main part with be formed with inclosed cavity between the translucent cover body, be equipped with in the cavity the circuit board. After setting up like this, test the electric installation and not only have waterproof effect, test the light that the display module of electric suggestion unit sent moreover and can be more even transmit out the translucent cover body, the luminous condition of the convenient observation of the position homoenergetic on ground test the electric installation, the practicality is better.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent by describing in greater detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.

Fig. 1 is a circuit block diagram of an electrical circuit according to an embodiment of the present invention;

fig. 2 is a schematic circuit structure diagram of an electrical signal obtaining unit of an electrical verification circuit according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a circuit structure of a display module in an electricity testing prompt unit of an electricity testing circuit according to an embodiment of the present invention;

fig. 4 is a schematic circuit structure diagram of a voice prompt module in an electricity verification prompt unit of an electricity verification circuit according to an embodiment of the present invention;

fig. 5 is a schematic circuit diagram of a main control unit of an electrical circuit testing circuit according to an embodiment of the present invention;

fig. 6 is a schematic circuit diagram of a power supply unit of a circuit testing circuit according to an embodiment of the present invention;

fig. 7 is a schematic front view of an electrical testing apparatus according to an embodiment of the present invention;

fig. 8 is a schematic top view of an electroscope apparatus according to an embodiment of the present invention;

fig. 9 is a schematic view of an installation of an electroscope apparatus according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.

While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present disclosure, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and, therefore, should not be taken as limiting the present disclosure.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

The utility model provides an electricity test circuit and test electric installation need not the direct contact circuit can detect whether the object that awaits measuring is electrified, and it is more convenient and safer to use.

The technical solution of the embodiments of the present invention is described in detail below with reference to the accompanying drawings.

Fig. 1 is a circuit block diagram of a circuit testing circuit according to an embodiment of the present invention. Referring to fig. 1, the electroscopic circuit includes: the power supply unit 400, the electric signal acquisition unit 200, the main control unit 100 and the electricity verification prompt unit 300, wherein the main control unit 100 comprises a signal input end a and inspection result output ends b1 and b 2; the power supply unit 400 is used for providing power for the electricity testing circuit, the signal input end a of the main control unit 100 is connected with the electric signal acquisition unit 200, and the test result output ends b1 and b2 of the main control unit 100 are connected with the electricity testing prompt unit 300. In the electricity testing circuit provided by this embodiment, the electric signal obtaining unit 200 can induce the electric field near the power transmission line through the inductive probe 210, convert the electric field signal into a voltage signal and then send the voltage signal to the main control unit 100, the main control unit 100 receives the voltage signal collected by the telecommunication signal obtaining unit 200, analyzes whether the object to be tested is electrified or not, and judges whether the object to be tested is electrified or not, and triggers the electricity testing prompt unit to give an alarm. For example, whether the basic characteristics of the alternating current are met or not can be analyzed according to the variation of the continuously collected voltage values, so as to judge whether the alternating current exists or not, if the alternating current exists, acousto-optic warning information is generated through the electricity testing prompting unit 300, and only sound warning or light warning or both sound and light warning can be realized.

Wherein, the utility model provides an object to be measured can be transmission line or other electrified devices, for example socket, switch etc. wherein the transmission line can be high-voltage transmission line or low-voltage transmission line. It should also be noted that the solution of the present invention, in addition to detecting ac, can also be used to detect dc, the principle of which is similar.

With continued reference to fig. 1, in an implementation manner, the power supply unit 400 is connected to the main control unit 100 through an input end d, the power supply unit 400 includes a battery 410 and a charging management module 420, the peripheral power adapter 600 may charge the battery 410 through the charging management module 420, and the battery 410 provides power for the electricity verification circuit. The power supply unit 400 further includes a charge indicator lamp 430, and the charge indicator lamp 430 is used to display a charging state. In one implementation, the electrical signal acquisition unit 200 includes a probe 210 that can induce an electrical field signal of a power transmission line in a non-contact manner. The probe can detect an electric field near a line by adopting a copper sheet type sensor, and the electric field signal is converted into a voltage signal and then sent to the main control unit 100. It is understood that other probes capable of non-contact inducing electric field signals may be used, and the present embodiment is not limited to the type of probe.

With continued reference to fig. 1, in the electricity testing circuit of the present embodiment, the electricity testing prompt unit 300 includes a voice prompt module and/or a display module, the voice prompt module may be a buzzer 310, the display module may be an indicator light set 320, the buzzer may emit voice to perform an audible alarm, and the display module may emit light to perform a visual alarm.

With reference to fig. 1, the electrical testing circuit provided in this embodiment further includes a self-checking switch 500, where the self-checking switch 500 is connected to the main control unit 100 through the self-input end c, and the self-checking switch 500 is used to trigger the electrical testing circuit to start a self-checking process, so as to determine whether the electrical testing circuit is normal.

Can discover from the above-mentioned description, the embodiment of the utility model provides an electricity circuit of testing, near the response of signal of telecommunication acquisition unit can non-contact object of awaiting measuring electric field, the main control unit can be according to the follow whether the object of awaiting measuring is electrified to the voltage signal analysis that the signal of telecommunication acquisition unit acquireed, will report an emergency and ask for help or increased vigilance the suggestion through the electric result signal input of testing that the analysis gained at last to test electric suggestion unit. After the arrangement, whether the object to be detected is electrified or not can be detected without directly contacting the object to be detected, such as a circuit to be detected, and an alarm is given, so that the device is more convenient and safer to use.

Fig. 2 is a schematic circuit structure diagram of an electrical signal obtaining unit of an electrical verification circuit according to an embodiment of the present invention; fig. 5 is a schematic circuit diagram of a main control unit 100 of an electrical testing circuit according to an embodiment of the present invention. Referring to fig. 2 and 5, the circuit of the electric signal obtaining unit 200 includes a resistor R6 and a resistor R28. The main control unit 100 includes a single chip microcomputer U1. The single chip microcomputer U1 includes pins 1-16, wherein pin 1 is connected to VCC25, i.e., the power supply unit in FIG. 6, pin 2 is connected to the BZ node, pin 3 is connected to the LED node, pin 5 is connected to the KEY node, pin 9 is connected to the ADC2 node for input of electrical signals, and pin 16 is grounded. Referring to fig. 2, the PROBE is connected to one end of a resistor R6, the other end of the resistor R6 is connected to both the pin 9 of the U1 of the single chip microcomputer and one end of a resistor R28, and the other end of the resistor R28 is grounded. After the PROBE senses an electric field, a voltage division is generated between the resistors R6 and R28, and the single chip microcomputer U1 acquires an AD (Analog-to-Digital) value of the voltage of the resistor R28 through an internal ADC (Analog-to-Digital converter). In this embodiment, the single chip microcomputer U1 analyzes whether the AD value meets the basic characteristics of the alternating current by continuously collecting the voltage signal of the resistor R28, for example: whether the cycle is 50HZ, reach and preset the threshold value when the peak value of amplitude, thereby judge whether PROBE PROBE is close to the alternating current, if judge near having the alternating current, then will test electric result signal transmission to test electric prompt unit 300, the electricity signal of testing that pin 3 sent can make emitting diode RED1, RED2, RED3, RED4 bright entirely, for example bright RED entirely, the electricity signal of testing that pin 2 sent can also make bee calling organ BZ1 send the pronunciation warning signal, the electric prompt of testing of this embodiment has visual and auditory suggestion concurrently, excellent in use effect. It should be noted that only the buzzer alarm or the RED light alarm may be used.

Fig. 3 is a schematic diagram of a circuit structure of a display module in an electricity testing prompt unit of an electricity testing circuit according to an embodiment of the present invention; fig. 4 is a schematic diagram of a circuit structure of a voice prompt module in an electricity verification prompt unit of an electricity verification circuit according to the present invention.

Referring to fig. 1, 3, 4 and 5, the output terminals of the main control unit 100 include a first output terminal b1 and a second output terminal b2, the first output terminal b1 is pin 2(BZ node) in fig. 5, and the second output terminal b2 is pin 3(LED node) in fig. 5. The electricity verification prompting unit 300 comprises a display module and a voice prompting module, the first output end b1 is connected with the voice prompting module, and the second output end b2 is connected with the display module. In this embodiment, the display module may be an indication lamp set 320, and the voice prompt module may be a buzzer 310. With reference to fig. 3, the display module includes a resistor R4, a triode Q3, and a light emitting diode group, the light emitting diode group includes light emitting diodes RED1, RED2, RED3, RED4, which are connected in parallel, the light emitting diodes RED1, RED2, RED3, RED4 can emit RED light to perform an electricity verification prompt, and the voice prompt module includes a resistor R7, a triode Q2, and a buzzer BZ 1.

With reference to fig. 1 to 5, in this embodiment, the first output terminal b1 of the main control unit 100 is a pin 2 of the single chip microcomputer U1, the second output terminal b2 is a pin 3 of the single chip microcomputer U1, the pin 2 is connected in series with the resistor R7 and then is connected to the base of the triode Q2, the emitter of the triode Q2 is grounded, and the collector of the triode Q2 is connected to the BZ1 and then is connected to the power supply VBAT +; the pin 3 is connected with the base electrode of the triode Q3 in series with the resistor R4, the emitter electrode of the triode Q3 is grounded, the collector electrode of the triode Q3 is connected with the cathode of the light-emitting diode group, and the anode of the light-emitting diode group is connected with a power supply through a joint VBAT +. In this embodiment, if singlechip U1 judges that the AD value of resistance R28 voltage accords with the characteristic of alternating current after, then output respectively at pin 2 and pin 3 and test the electric result signal, will test the electric result signal and send to test electric suggestion unit 300 through pin 2 and pin 3, the electricity signal of testing that pin 3 sent can make emitting diode RED1, RED2, RED3, RED4 is bright entirely, for example bright RED, the electricity signal of testing that pin 2 sent can make bee calling organ BZ1 send speech signal, the suggestion of testing electric of this embodiment has vision and auditory suggestion concurrently, excellent in use effect. It should be noted that only the buzzer alarm or the RED light alarm may be used.

Fig. 6 is a schematic circuit diagram of a power supply unit of a circuit testing circuit according to an embodiment of the present invention. Referring to fig. 5 and 6, the power supply unit includes a chip U2, a lightning arrester F1, a transient voltage suppression diode ESD1, a zener diode D2, a light emitting diode D5, a light emitting diode D7, a resistor R16, a resistor R17, a resistor R18, a capacitor C2, a capacitor C5, a capacitor C7, a capacitor C8, and a voltage regulator Q4. The chip U2 is used for charge management, the chip U2 comprises pins 1-8, and pin 1 and pin 3 are grounded; pin 2 is connected with a resistor R18 in series and then is grounded; the pin 4 is connected to the light emitting diode D5, the anode of the light emitting diode D7, one end of the capacitor C8 and the cathode of the zener diode D2 at the same time, the anode of the zener diode D2 is connected to one end of the arrester F1, the other end of the arrester F1 and one end of the transient voltage suppression diode ESD1 are connected to the charging interface VIN at the same time, the charging interface VIN is used for connecting a peripheral power adapter, and the other end of the transient voltage suppression diode ESD1 is grounded; pin 5 and pin 8 of the chip U2 are connected to the capacitor C2, one end of the capacitor C5, and pin 3 of the regulator Q4, the other ends of the capacitor C2 and the capacitor C5 are grounded, pin 1 of the regulator Q4 is grounded, and pin 2 of the regulator Q4 is connected to one end of the capacitor C7 and pin 1 of the single chip U1 through the node VCC 25.

In this embodiment, the chip U2 is used for charge management, and the external power adapter is connected to the circuit at the interfaces VIN and GND to charge the battery J1. The transient voltage suppression diode ESD1 is used for suppressing the transient voltage, and the voltage stabilizing diode D2 is used for stabilizing the voltage, so that the charging is more stable. The light emitting diodes D5 and D7 are used for charge state indication, the light emitting diode D5 emits green light, the light emitting diode D7 emits red light, when the electricity is not fully charged, the light emitting diode D7 is bright, and after the electricity is fully charged, the light emitting diode D5 is bright. In this embodiment, the circuit of the power supply unit 400 is connected to the pin 1 of the U1 of the single chip microcomputer through the node VCC25, and supplies power to the U1 of the single chip microcomputer. The single chip microcomputer U1 is further connected with a light emitting diode LED1, an LED2, an LED3 and an LED4 through

pins

15, 14, 13 and 12 of the single chip microcomputer U1 respectively, the light emitting diode LED1, the LED2, the LED3 and the LED4 are used for displaying a charging state and the electric quantity of a battery during charging, and in the charging process, the LED1, the LED2, the LED3 and the LED4 flicker sequentially and are all lightened after being fully charged.

In this embodiment, the power supply unit 400 is connected to the circuit of the electricity-testing prompt unit 300 through the node VBAT + to supply power to the leds RED1, RED2, RED3, RED4 and the buzzer BZ 1.

In this embodiment, still be connected with the interface of self-checking switch in the electricity testing circuit, the self-checking switch can be the magnetic reed switch, and when magnet was close to, the magnetic reed switch switched on, triggered the electricity testing circuit and got into the self-checking flow, and the self-checking result can be reminded through buzzer BZ1 sound, and when the self-checking electricity testing circuit was not unusual, buzzer BZ1 lasted the sound. In this embodiment, the self-checking switch may be connected to the electricity-checking circuit through interfaces SW1 and SW2 provided on the electricity-checking circuit, interface SW1 is connected to pin 8 of chip U2, and interface SW2 is connected to battery J1. After the circuit connection self-checking switch of this embodiment, before testing the electricity, be close to the self-checking switch with magnet earlier, then automatic trigger self-checking flow, the self-checking result can be reminded through the bee calling organ of testing electric prompt unit, and such setting can carry out non-contact operation when troubleshooting, and is more convenient, safety.

Introduced above the utility model discloses a pair of test electric circuit, it is corresponding, the utility model also provides an electricity testing device.

The electroscope apparatus includes an electroscope circuit as shown in figures 1 to 6. The electricity testing device can test whether alternating current exists on an object to be tested such as a power transmission line in a non-contact mode, and when the alternating current exists, an acousto-optic alarm can be given out to prompt. Therefore, no matter how the entity structure of the electricity testing device changes, as long as the electricity testing device provided with the electricity testing circuit can detect whether the object to be tested is electrified or not without directly contacting the object to be tested, such as a circuit to be tested, and send out an alarm, so that the use is more convenient and safer.

Fig. 7 is a schematic front view of an electrical testing apparatus according to an embodiment of the present invention; fig. 8 is a schematic top view of an electroscope apparatus according to an embodiment of the present invention; fig. 9 is a schematic view of an installation of an electroscope apparatus according to an embodiment of the present invention.

Referring to fig. 7-9, in the present embodiment, the electrical testing apparatus is provided with a circuit board, and the circuit board includes the electrical testing circuit shown in fig. 1 to 6. The electricity testing circuit can refer to the above description, and is not described in detail here. The electroscope comprises a main body 700 and a cover body 710 fixed with the main body 700 into a whole, a closed cavity 711 is formed between the main body 700 and the cover body 710, and a circuit board 740 containing an electroscope circuit is fixedly arranged in the cavity 711.

In one implementation, the cover 710 may be a transparent cover, and the light emitting diode set 743 and the charging indicator 742 are mounted on a side of the circuit board 740 facing the cover 710. After the arrangement, the cover body 710 has a light-transmitting function, the light-emitting diode group 743 is used as a display module of the electricity testing prompt unit 300 and used for emitting red light to perform visual electricity testing prompt, the charging indicator lamp 742 and the light energy emitted by the light-emitting diode group 743 are emitted through the cover body 710, a user can acquire electricity testing result information through vision, and the cover body 710 is hermetically mounted on the main body 700 and can effectively prevent rainwater from infiltrating into the main body, so that the performance of the electricity testing device is more stable.

In one implementation, the buzzer 741 and the self-checking switch 744 are connected to the circuit board and located in the cavity 711. In this embodiment, the cover 710 may be made of a transparent material with a good sound guiding effect, the sound generated by the buzzer 741 may be transmitted out through the cover 710, and the buzzer 741 is disposed in the cover 710, so that the cover has a waterproof effect and is better suitable for use in an outdoor environment. In this embodiment, since the self-checking switch 744 is a reed switch and is located in the cover 710, during self-checking, only one magnet needs to be close to the cover 710, so that the reed switch can be turned on to trigger the self-checking process of the electricity-checking circuit. By the arrangement, self-inspection can be performed without directly contacting an object to be inspected, such as a power transmission line. In addition, the non-contact self-checking can avoid the danger of electric shock, and the use is safer.

In this embodiment, the main body 700 is further provided with a buckle for detachably fixing the electricity testing device on the power transmission line. The buckle can be fixed in on the circuit with testing electric installation. Like this, when the staff detects whether transmission line is electrified, can very conveniently will test electric installation card on the transmission line, need not just like correlation technique like the handheld electroscope of one hand only one hand can work again, just so can liberate both hands and all can maintain various operations such as, more convenient also safer.

It can be understood that the clamping buckle is not needed to be arranged on the electricity testing device, namely, the clamping component is not needed, only the main body and the cover body are included, and the electricity testing device is directly close to a circuit during use.

In one implementation, the latch includes a connecting member 720 extending from the main body, and a clamping member 722 hinged to the connecting member 720 through a connecting shaft 721 and a spring, so that the clamping member 722 can be elastically flipped around the connecting shaft 721 after being disposed. The clamping member 722 can be provided in a sheet shape, the end of the clamping member 722 is provided with a rib, a groove 723 can be provided on the main body, and an opening capable of opening and closing is formed between the groove 723 and the clamping member 722 when the clamping member 722 is turned over. When the electricity testing device is installed on the power transmission line 800, the clamping piece 722 is pulled out by using a customized tool, the clamping piece 722 is loosened after the power transmission line 800 is placed in the groove 723 through the opening, the clamping piece 722 is elastically clamped on the power transmission line 800, and the installation of the electricity testing device is completed.

In one implementation, in order to make the installation of the electricity testing device more stable, the number of the buckles can be set to be two, and the two buckles are arranged oppositely. After setting up like this, the clamping piece of two buckles carries out the centre gripping simultaneously in relative both sides to power transmission line 800, and the centre gripping is more firm like this, can prevent effectively that the electroscope from droing.

In one implementation, for more convenient charging of the electric testing device, the circuit board 740 is connected with a charging interface 730 through a wire, and the charging interface 730 extends out of the main body 700.

In an implementation manner, the cover body 710 can be set to be in a circular arc shape, after the electrical testing device is installed, the circular arc-shaped cover body 710 is right opposite to the ground, after the arrangement, the light emitted by the light emitting diode group 743 is transmitted out of the cover body more uniformly, the light emitting condition of the electrical testing device can be conveniently observed at different positions on the ground, the practicability is better, it can be understood that the cover body 710 can also be set to be in other shapes, and the shape of the cover body is not limited in the embodiment.

The technical solution according to the present invention has been described in detail above with reference to the accompanying drawings.

While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electroscopic circuit, comprising:

2. The electroscopic circuit according to claim 1, wherein:

still include the self-checking switch, the self-checking switch with the self-checking input of main control unit is connected, triggers test the circuit and start the self-checking.

3. The electroscopic circuit according to claim 1, wherein:

the electric signal acquiring unit includes at least: the probe is connected with the first resistor in series and connected with the second resistor in parallel and then connected to the main control unit, and the probe induces an alternating current electric field and then generates a divided voltage on the second resistor.

4. The electroscopic circuit according to claim 3, wherein:

the main control unit is provided with an ADC (analog to digital converter) for acquiring a voltage value generated by the second resistor in the electric signal acquisition unit, and whether the voltage value accords with the alternating current characteristic or not is analyzed in a changing mode according to the continuously acquired voltage value, and whether an object to be detected is electrified or not is judged according to an analysis result.

5. The electroscopic circuit according to claim 3, wherein:

the electricity testing prompt unit further comprises a voice prompt module and/or a display module;

6. The electroscopic circuit according to claim 5, wherein:

the voice prompt module comprises a buzzer and a first triode, wherein the first end of the buzzer is connected with a power supply, the second end of the buzzer is connected with the collector of the first triode, the emitter of the first triode is grounded, and the base of the first triode is connected with a resistor in series and then is connected to one pin of the main control unit; or the like, or, alternatively,

7. The electroscopic circuit according to claim 2, wherein:

the power supply unit is provided with a charging indicator light for displaying a charging state.

8. An electroscope, its characterized in that:

the electroscopic device is provided with a circuit board comprising an electroscopic circuit according to any one of claims 1 to 7.

9. The electroscope of claim 8, wherein:

the electricity testing device comprises a main body and a transparent cover body, wherein a closed cavity is formed between the main body and the transparent cover body, and the circuit board is arranged in the cavity.

10. The electroscope of claim 9, wherein:

the electricity testing device is also provided with a buckle capable of clamping a circuit to be tested;