Electricity testing device

Abstract

The invention provides an electricity testing device which comprises an electroscope, the electroscope comprises a detection module, the detection module comprises a first coil group and a second coil group, the first coil group comprises a plurality of coil pairs connected in series, each coil pair comprises two coils connected in a differential pair mode, and the second coil group comprises a plurality of coils connected in a star shape. The first coil assembly surrounds the outer side of the second coil assembly. Through the arrangement, the electromagnetic coil approaches the to-be-tested electrical device, the change of an electromagnetic field near an electrified conductor is induced and converted into an electric signal, and thus non-contact electricity testing is realized; the first coil group comprises a plurality of coil pairs which are in differential pair connection, so that common-mode noise and signals induced in other directions can be effectively eliminated, the signal-to-noise ratio is improved, and the measurement precision is improved; the second coil group comprises a plurality of coils which are connected in a star shape, so that the load of each coil can be balanced, and the influence of common-mode voltage can be reduced.

Description

Technical Field

[0001] This application relates to the field of voltage detector technology, and in particular to a voltage detector device. Background Technology

[0002] In the maintenance and repair of active power distribution network power lines, voltage detectors are usually used to test electrical components such as cables and capacitors to ensure the safety of maintenance personnel when performing maintenance work on electrical components.

[0003] Currently, contact voltage detectors are widely used. However, as voltage levels increase, the electrical devices under test are also raised higher off the ground, making them unsuitable for operation. Furthermore, contact voltage detectors pose certain safety hazards to the personnel conducting the tests. Summary of the Invention

[0004] In view of this, this application provides a voltage testing device that can realize non-contact voltage testing operation.

[0005] Specifically, the following technical solutions are included:

[0006] This application provides an electrical testing device, the electrical testing device comprising:

[0007] An electroscope includes a detection module, the detection module including a first coil group and a second coil group, the first coil group including multiple coil pairs connected in series, each coil pair including two differentially connected coils, the second coil group including multiple coils connected in a star shape, and the first coil group surrounding the second coil group.

[0008] In an optional embodiment, there are multiple first coil groups and multiple second coil groups, which are stacked on top of each other.

[0009] In an optional embodiment, the electroscope further includes an intelligent circuit module electrically connected to the detection module. The intelligent circuit module includes one or more of the following: a signal tracking circuit, a filtering circuit, a voltage multiplier rectifier circuit, an operational amplifier circuit, a discharge circuit, a Schmitt trigger circuit, and a signal indication circuit.

[0010] In an optional embodiment, the electroscope further includes a communication module, which is electrically connected to both the intelligent circuit module and the detection module, and is used to communicate with remote devices.

[0011] In an optional embodiment, the detection module further includes a temperature sensor and a humidity sensor, the temperature sensor being used to detect the ambient temperature and the humidity sensor being used to detect the ambient humidity.

[0012] In an optional embodiment, the voltage detector further includes a support assembly comprising a handle, a working handle, and a voltage detector bracket connected in sequence, wherein the working handle is telescopic and the voltage detector bracket is detachably connected to the voltage detector.

[0013] In an optional embodiment, the working handle includes a first rod and a second rod, the first rod being inserted into the second rod, and the first rod being movable along the length direction of the second rod;

[0014] The outer wall of the end of the first rod is provided with a first groove, in which a friction spring ring is embedded. The outer wall of the end of the second rod is provided with a second groove, which is used to accommodate the friction spring ring.

[0015] In an optional embodiment, there are multiple first grooves, multiple second grooves, and multiple friction spring coils, all of which are spaced apart along the length direction of the working handle.

[0016] In an optional embodiment, the electroscope holder is threadedly connected to the electroscope.

[0017] In an optional embodiment, the electroscope includes a first housing and a second housing that are mated together, with a sealing ring disposed between the first housing and the second housing.

[0018] The beneficial effects of the technical solution provided in this application include at least the following: by setting the detection module to include a first coil group and a second coil group, the electromagnetic coil is brought close to the electrical device under test, the change of electromagnetic field near the charged conductor is sensed and converted into an electrical signal, thereby realizing non-contact voltage detection; by setting the first coil group to include multiple sets of coil pairs connected in a differential manner, common-mode noise and signals induced from other directions can be effectively eliminated, the signal-to-noise ratio can be improved, and the measurement accuracy can be improved; by setting the second coil group to include multiple coils connected in a star shape, it helps to balance the load of each coil and reduce the influence of common-mode voltage. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the voltage detector in the voltage detection device provided in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the detection module provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the signal transmission of the voltage detection device provided in the embodiments of this application;

[0023] Figure 4 A schematic diagram illustrating the working process of the Bluetooth circuit provided in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the voltage detection device provided in the embodiments of this application;

[0025] Figure 6 An exploded view of the handle, anti-slip insulating sleeve, and insulating plug provided in an embodiment of this application;

[0026] Figure 7 This is a structural schematic diagram of the first or second rod provided in the embodiments of this application;

[0027] Figure 8 This is a schematic diagram of the structure of the electroscope bracket provided in the embodiment of this application.

[0028] The reference numerals in the figure are respectively:

[0029] 1-Electrical detector;

[0030] 11-Detection module; 111-First coil group; 1111-Coil pair; 112-Second coil group;

[0031] 12-Intelligent circuit module; 121-Signal tracking circuit; 122-Filtering circuit; 123-Voltage doubler rectifier circuit; 124-Operational amplifier circuit; 125-Discharge circuit; 126-Schmitt trigger circuit; 127-Signal indication circuit;

[0032] 13-Communication module;

[0033] 141 - First shell; 142 - Second shell;

[0034] 15 - Sealing ring;

[0035] 161-Alarm buzzer; 162-Alarm indicator light; 163-On / Off button; 164-Alarm voltage level indicator light; 165-Alarm voltage level button; 166-Bracket interface; 167-Charging interface; 168-Charging indicator light;

[0036] 2-Support assembly;

[0037] 21-Handle;

[0038] 22-Working handle; 221-First rod body; 2211-First groove; 2212-Friction spring ring; 222-Second rod body; 2221-Second groove;

[0039] 23-Electrical detector bracket;

[0040] 24-Insulating plug;

[0041] 25-Anti-slip insulating sleeve.

[0042] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0045] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art. Some technical terms appearing in the embodiments of this application are described below.

[0046] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0047] In the maintenance and repair of active power distribution network power lines, voltage detectors are usually used to test electrical components such as cables and capacitors to ensure the safety of maintenance personnel when performing maintenance work on electrical components.

[0048] Currently, contact voltage detectors are widely used. However, as voltage levels increase, the electrical devices under test are also raised higher off the ground, making them unsuitable for operation. Furthermore, contact voltage detectors pose certain safety hazards to the personnel conducting the tests.

[0049] To address the aforementioned technical problems, this application provides an electrical detection device.

[0050] like Figure 1 and Figure 2 As shown, the voltage testing device includes an electroscope 1, which includes a detection module 11. The detection module 11 includes a first coil group 111 and a second coil group 112. The first coil group 111 includes multiple coil pairs 1111 connected in series, and each coil pair 1111 includes two coils connected in a differential pair. The second coil group 112 includes multiple coils connected in a star shape. The first coil group 111 surrounds the second coil group 112.

[0051] When the detection module 11 approaches a charged conductor, it detects the surrounding alternating electromagnetic field or electromagnetic radiation through the principle of electromagnetic induction. Even without direct contact, it can identify the presence of a high-voltage electric field, achieving non-contact voltage detection. This significantly reduces the safety risks for operators in high-voltage environments, while also reducing physical exertion and improving operational convenience. Furthermore, when the detection module 11 approaches a charged conductor, the changing electromagnetic field induces an electromotive force in the coil, serving as the basis for subsequent processing.

[0052] Differential pair connection is a common anti-interference technique. By subtracting the signals of a pair of tightly coupled coils with opposite signals, common-mode noise and signals induced from other directions can be effectively eliminated, thereby improving the signal-to-noise ratio and measurement accuracy.

[0053] For example, such as Figure 2 As shown, the first coil group 111 includes four coil pairs 1111. Each coil pair 1111 includes two coils connected in series with opposite signal directions. The four coil pairs 1111 are connected in series and connected end to end in a loop. The center of the loop is the second coil group 112, which makes full use of the arrangement space.

[0054] Specifically, the first coil group 111 is used to eliminate the charge generated by all phase lines or power grids other than the electrical device under test, and the first coil group 111 is grounded.

[0055] Specifically, the two coils in each coil pair 1111 have the same structure and are symmetrically arranged, with the two coils wound in opposite directions, thereby generating opposite electromagnetic signals. This allows the electromagnetic fields radiated by the two coils to cancel each other outward, effectively suppressing electromagnetic interference. Simultaneously, this arrangement ensures that the detection module 11 only works on the live conductor in the directly opposite direction, eliminating the influence of other electrical components, facilitating single-wire voltage testing on-site, and improving the detection accuracy of the voltage detector 1.

[0056] For example, such as Figure 2As shown, the second coil group 112 includes three coils. The first ends of each coil are connected to form a center point, and the second ends are respectively connected to the intelligent circuit module 12 of the voltage detection device, specifically to the signal tracking circuit 121. By setting multiple coils to be connected in a star configuration, it is beneficial to balance the load of each coil, reduce the influence of common-mode voltage, and improve measurement accuracy.

[0057] Specifically, the second coil group 112 enhances the ability of the detection module 11 to detect the induced charge of the electrical device under test. Since each coil pair 1111 in the first coil group 111 includes two differentially connected coils, the charge or magnetic field induced by the second coil group 112 on the first coil group 111 will be canceled out. The induced charge after the magnetic field is canceled out is zero, thus ensuring that the second coil group 112 is not affected by the first coil group 111.

[0058] Specifically, the spacing and number of turns of the coils can be set according to the actual application scenario.

[0059] The ideal spacing between coils should minimize the mutual inductance between adjacent coils to avoid signal interference, while maintaining sufficient sensitivity to capture electromagnetic fields within the target frequency range. Furthermore, the spacing must also meet mechanical strength and heat dissipation requirements. The number of turns directly affects the coil's inductance and quality factor (Q value), thus influencing its response to signals at specific frequencies. Too many turns increase the coil's self-inductance, leading to poor low-frequency response; too few turns may reduce signal strength and affect detection sensitivity. Therefore, the selection of the number of turns needs to be carefully adjusted based on the target frequency, required sensitivity, and circuit matching conditions. A variable number of turns design can also be used to adapt to detection needs under different operating conditions.

[0060] Optionally, superconducting materials or special nanocomposite materials can be used as the core of the coil to reduce resistance loss, improve signal transmission efficiency and sensitivity, and help achieve high-precision detection under extreme conditions.

[0061] The voltage detection device provided in this application embodiment, by setting the detection module 11 to include a first coil group 111 and a second coil group 112, utilizes an electromagnetic coil to approach the electrical device under test, senses the change in electromagnetic field near the charged conductor and converts it into an electrical signal, thereby realizing non-contact voltage detection; by setting the first coil group 111 to include multiple sets of coil pairs 1111 connected in a differential pair, common-mode noise and signals induced from other directions can be effectively eliminated, improving the signal-to-noise ratio and measurement accuracy; by setting the second coil group 112 to include multiple coils connected in a star shape, it helps to balance the load of each coil and reduce the influence of common-mode voltage.

[0062] In a further embodiment, there are multiple first coil groups 111 and multiple second coil groups 112, and the multiple first coil groups 111 and multiple second coil groups 112 are stacked respectively.

[0063] Specifically, each first coil group 111 is connected to the intelligent circuit module 12 of the voltage detection device, which can be connected to the input terminal of the signal tracking circuit 121.

[0064] In this embodiment, multiple first coil groups 111 or multiple second coil groups 112 are superimposed or intertwined to form a multi-layer composite structure, which can construct a three-dimensional sensing network, realize collaborative sensing, capture weak electromagnetic signals from any direction, and ensure that there is no mutual interference. Even targets in complex electromagnetic environments can be accurately located and their characteristics analyzed, greatly improving the practicality and flexibility of the device.

[0065] Optionally, a shielding layer and an insulating layer are provided between two adjacent first coil groups 111 and between two adjacent second coil groups 112 to isolate external electromagnetic interference and crosstalk between internal coils.

[0066] Alternatively, filtering networks, active compensation circuits, or intelligent signal processing algorithms can be used to dynamically adjust the coupling relationship between coils, thereby actively suppressing specific interferences and maximizing signal purity and measurement accuracy.

[0067] In one specific embodiment, the electroscope 1 further includes an intelligent circuit module 12, which is electrically connected to the detection module 11. The intelligent circuit module 12 includes one or more of the following: a signal tracking circuit 121, a filtering circuit 122, a voltage doubler rectifier circuit 123, an operational amplifier circuit 124, a discharge circuit 125, a Schmitt trigger circuit 126, and a signal indication circuit 127.

[0068] For example, such as Figure 3 As shown, the intelligent circuit module 12 includes a signal tracking circuit 121, a filter circuit 122, a voltage doubler rectifier circuit 123, an operational amplifier circuit 124, a discharge circuit 125, a Schmitt trigger circuit 126, and a signal indicator circuit 127. After the detection module 11 reads the electric field signal, it uses the signal tracking, voltage doubler rectification, subtraction, amplification, and Schmitt trigger of the intelligent circuit module 12 to determine whether the electrical device under test is energized, and controls the alarm through the signal indicator circuit 127.

[0069] The voltage detection device provided in this application embodiment, by setting up an intelligent circuit module 12, realizes accurate detection and analysis of the charge in the power system, and promotes a comprehensive improvement in the safety, efficiency and intelligence level of power system maintenance and repair operations.

[0070] The following section explains each circuit of the intelligent circuit module 12.

[0071] (I) Signal tracking circuit 121

[0072] Components: Includes a precision operational amplifier, resistors, and capacitors;

[0073] Function: To enhance and extract the weak signal obtained by the detection module 11, ensuring that the signal is clearly distinguishable;

[0074] Working principle: The original signal is amplified by using amplifiers and other components.

[0075] (II) Filtering Circuit 122

[0076] Composition: Includes capacitors and resistors (RC filter), or includes inductors and capacitors (LC filter);

[0077] Function: To remove unwanted frequency components and retain only the frequency ranges relevant to the target signal;

[0078] Working principle: Low-pass, high-pass, or band-pass filters are used to filter out high-frequency noise or low-frequency interference in the environment based on the spectral characteristics of the desired signal.

[0079] (III) Voltage Doubler Rectifier Circuit 123

[0080] Components: Includes diodes (such as the four diodes in a bridge rectifier circuit), capacitors, and resistors;

[0081] Function: Converts the sensed AC signal into a DC signal that can be used for subsequent circuit processing, and may increase the signal level through voltage multiplication;

[0082] Working principle: AC to DC conversion is achieved through diode bridge rectification and capacitor charging effect, and the voltage multiplier circuit increases the voltage through the superposition of multiple capacitor charging and discharging.

[0083] (iv) Operational discharge circuit 125

[0084] Composition: Based on differential amplifier design, the operational discharge circuit 125 includes at least two operational amplifiers and multiple resistors;

[0085] Function: When multiple signals are input to the detection module 11, the common-mode signal is eliminated by subtraction, and only the differential-mode signal is retained, thereby improving the purity of the signal;

[0086] Working principle: The differential discharge circuit 125, which is composed of an operational amplifier, performs subtraction on the two signals.

[0087] (V) Discharge Circuit 125

[0088] Composition: Includes MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), relays, or switching elements;

[0089] Function: To quickly release the charge accumulated in sensors or circuits when needed, protect circuit components from high voltage damage, and ensure equipment safety.

[0090] (vi) Schmitt trigger circuit 126

[0091] Composition: Includes a comparator and a positive feedback loop;

[0092] Function: Provides clear logic level output for signal threshold determination and shaping;

[0093] Working principle: The comparator with hysteresis characteristics will only flip when the input signal exceeds the set upper and lower thresholds, thus eliminating false triggering caused by noise.

[0094] (vii) Signal indication circuit 127

[0095] Composition: alarm indicator light 162, alarm buzzer 161, display screen, and corresponding driving circuit (such as transistor or MOSFET driving alarm indicator light 162, or microcontroller controlling display screen).

[0096] Function: To intuitively display the detection status, such as whether an electric field is detected and the electric field strength level on the display screen;

[0097] Working principle: The alarm indicator light 162, alarm buzzer 161, display screen and other indicating devices are driven by the output signal of the processor or logic circuit. For example, the presence or absence of power can be distinguished by the on / off state of the alarm indicator light 162 or the change of characters on the screen.

[0098] For example, please refer to Figure 3 The signal transmission process between the detection module 11 and the intelligent circuit module 12 is as follows:

[0099] The detection module 11 reads the electric field signal near the electrical device under test and sends the AC signal to the signal tracking circuit 121;

[0100] After the AC signal is followed and positively biased by the signal tracking circuit 121, it is filtered by the filter circuit 122.

[0101] The AC signal is sent to the voltage doubler rectifier circuit 123, and is converted into a DC signal after voltage doubler rectification.

[0102] The DC signal is sent to the operational amplifier circuit 124 to subtract the interference signal between adjacent lines, and the useful signal is input to the discharge circuit 125 for necessary amplification.

[0103] The amplified signal is sent to the Schmitt trigger circuit 126, which sends an electrical signal or no electrical signal to the signal indicator circuit 127 according to the magnitude of the input signal.

[0104] After receiving an electrical signal or a no-electrical signal, the signal indication circuit 127 will issue an alarm through the alarm indicator light 162, the alarm buzzer 161, the display screen, etc.

[0105] In a further embodiment, the electroscope 1 also includes a communication module 13, which is electrically connected to the intelligent circuit module 12 and the detection module 11 respectively, and is used to communicate with remote devices.

[0106] Specifically, remote devices can be electronic devices such as mobile phones and tablets, or they can be monitoring centers.

[0107] like Figure 3 As shown, the Schmitt trigger circuit 126 also sends an electrical signal or no electrical signal to the communication module 13, so that the communication module 13 can transmit the signal to a remote device for monitoring.

[0108] In this embodiment, by setting up the communication module 13, the voltage detection data of the voltage detector 1 can be uploaded in real time, thereby supporting data analysis and decision-making, and greatly enhancing the intelligent management level of the power network.

[0109] For example, the communication module 13 includes a Bluetooth circuit, which includes a radio frequency transceiver, a baseband processor, a microcontroller, a crystal oscillator, and an antenna, wherein the microcontroller is used for data processing and control, the crystal oscillator is used to provide a clock signal, and the antenna is used to transmit and receive wireless signals.

[0110] The Bluetooth circuit is used to receive the voltage verification data sent by the detection module 11, and wirelessly transmit the data to the paired remote device after encoding and encrypting it through the Bluetooth protocol stack.

[0111] By incorporating Bluetooth circuitry, users can view voltage testing data in real time via remote devices from a safe distance, thus enhancing the intelligence of the voltage testing device.

[0112] Optionally, users can interact with the Bluetooth circuitry via an app on a remote device. For example... Figure 4 As shown, the Bluetooth circuit's workflow includes:

[0113] (1) The user opens the APP on the remote device;

[0114] (2) Display the found Bluetooth devices on the APP interface;

[0115] (3) The user selects the corresponding electroscope 1 in the APP;

[0116] (4) The APP sends a command to the Bluetooth circuit of the detector 1;

[0117] (5) After receiving the instruction, the Bluetooth circuit of the voltage detector 1 sends the voltage detection data to the APP;

[0118] (6) The APP receives the voltage verification data and displays it on the interface.

[0119] In one embodiment, the detection module 11 further includes a temperature sensor and a humidity sensor, wherein the temperature sensor is used to detect the ambient temperature and the humidity sensor is used to detect the ambient humidity.

[0120] Ambient temperature and humidity are important factors affecting the measurement results of the voltage detector 1. When the temperature and humidity change, the measurement results will also deviate. By setting temperature and humidity sensors, the ambient temperature and humidity can be obtained, so that the measurement results can be compensated and calculated, thereby correcting the detection results, obtaining more accurate voltage detection data, improving the applicability of the voltage detector, and ensuring that the voltage detector can work stably under various conditions.

[0121] In one embodiment, such as Figure 5 As shown, the voltage testing device also includes a support assembly 2, which includes a handle 21, a working handle 22 and a voltage tester bracket 23 connected in sequence. The working handle 22 is a telescopic structure, and the voltage tester bracket 23 is used for detachable connection with the voltage tester 1.

[0122] like Figure 5 As shown, the two ends of the working handle 22 are connected to the handle 21 and the voltage detector bracket 23, respectively. By setting the working handle 22 to be a telescopic structure, the length of the working handle 22 can be adjusted, which makes it convenient for users to adjust the distance between the voltage detector 1 and the electrical device under test, and to measure at different heights or angles to obtain accurate voltage detection data.

[0123] like Figure 5 and Figure 6 As shown, the bracket assembly 2 also includes an insulating plug 24, which is installed at the end of the working handle 22 away from the voltage detector bracket 23. The insulating plug 24 is generally inverted "T" shape, with an "I"-shaped protective ring in the middle. Exemplarily, the insulating plug 24 is made of metal and is tightly connected to the working handle 22 by a threaded connection, which can prevent the insulating plug 24 from loosening and ensure the waterproof performance of the working handle 22.

[0124] like Figure 5 and Figure 6As shown, the support assembly 2 also includes an anti-slip insulating sleeve 25, which is dumbbell-shaped and has a rough texture on its surface to enhance grip stability. The anti-slip insulating sleeve 25 is used to cover the outside of the handle 21. Both ends of the anti-slip insulating sleeve 25 are provided with baffles that can abut against the insulating plug 24, thereby firmly locking the anti-slip insulating sleeve 25 onto the handle 21 and preventing the anti-slip insulating sleeve 25 from shifting.

[0125] For example, the anti-slip insulating sleeve 25 is made of hard silicone insulating material to improve grip comfort and safety.

[0126] For example, the handle 21 is made of polyethylene, polyvinyl chloride, rigid amide, and fiberglass tubing insulation material to ensure good insulation performance. One end of the handle 21 is threaded to the insulating plug 24, and the other end is connected to the working handle 22.

[0127] For example, both the working handle 22 and the voltage detector holder 23 are made of glass fiber reinforced epoxy composite insulation material, which has excellent insulation and mechanical properties. One end of the working handle 22 is connected to the handle 21, and the other end is connected to the voltage detector holder 23.

[0128] The electroscope bracket 23 is connected to the electroscope 1 via a detachable connection method such as a snap-fit ​​connection or a threaded connection, which helps to improve the efficiency of assembling and disassembling the electroscope 1 and the electroscope bracket 23. For example, in one embodiment, the electroscope bracket 23 is threaded to the electroscope 1, with an external thread at the end of the electroscope bracket 23 and an internal thread at the interface of the electroscope 1. The detachable connection between the electroscope bracket 23 and the electroscope 1 is achieved through the cooperation of the internal and external threads.

[0129] Furthermore, the working handle 22 includes a first rod 221 and a second rod 222. The first rod 221 is inserted into the second rod 222, and the first rod 221 can move along the length direction of the second rod 222. The outer wall of the first rod 221 is provided with a first groove 2211, and a friction spring coil 2212 is embedded in the first groove 2211. The outer wall of the second rod 222 is provided with a second groove 2221, which is used to accommodate the friction spring coil 2212.

[0130] Specifically, the second rod 222 is a hollow structure, and the outer diameter of the first rod 221 is slightly smaller than the inner diameter of the second rod 222, so that the second rod 222 can move within the first rod 221.

[0131] For example, the first rod 221 is connected to the electroscope bracket 23, and the second rod 222 is connected to the handle 21; or, the first rod 221 is connected to the handle 21, and the second rod 222 is connected to the electroscope bracket 23.

[0132] The friction spring ring 2212 is annular and made of spring steel. It is embedded in the first groove 2211 at high temperatures. The first groove 2211 is located at the end of the first rod 221 near the second rod 222, and the second groove 2221 is located at the end of the second rod 222 near the first rod 221. When the first rod 221 extends outward from the second rod 222 to its limit position, the friction spring ring 2212 can enter the second groove 2221, preventing the first rod 221 from overextending and disengaging from the second rod 222. When it is necessary to shorten the working handle 22, force is applied to the first rod 221 to disengage the friction spring ring 221 from the second groove 2221, allowing the first rod 221 to retract along the length of the second rod 222.

[0133] In this embodiment, the cooperation between the first groove 2211, the second groove 2221 and the friction spring ring 2212 can prevent the first rod 221 from disengaging from the second rod 222, thereby improving the stability and reliability of the working handle 22.

[0134] Furthermore, there are multiple first grooves 2211, multiple second grooves 2221, and multiple friction spring rings 2212, and the multiple first grooves 2211, multiple second grooves 2221, and multiple friction spring rings 2212 are distributed at intervals along the length direction of the working handle 22.

[0135] like Figure 7 As shown, two second grooves 2221 are formed on the inner wall of the upper end of the second rod 222, and each second groove 2221 is used to accommodate a friction spring ring 2212.

[0136] By setting multiple first grooves 2211, multiple second grooves 2221, and multiple friction spring rings 2212, the stability of the working handle 22 is further enhanced, preventing the first rod 221 from retracting or detaching from the second rod 222.

[0137] Optionally, the outer wall of the end of the second rod 222 used for connection with the handle 21 is provided with one or more first grooves 2211, for example... Figure 7As shown, two first grooves 2211 are formed on the outer wall of the lower end of the second rod 222, and a friction spring coil 2212 is embedded in each first groove 2211. One or more second grooves 2221 are formed on the inner wall of the end of the handle 21 that connects to the second rod 222, and these second grooves 2221 are used to accommodate the friction spring coils 2212. The second rod 222 is inserted into the hollow handle 21 and can move along the length of the handle 21. This arrangement allows the second rod 222 to extend and retract within the handle 21, improving the flexibility of the support assembly 2; at the same time, it prevents the second rod 222 from detaching from the handle 21, improving the stability and reliability of the support assembly 2.

[0138] Optionally, the outer wall of the end of the electroscope bracket 23 that is connected to the first rod 221 has one or more first grooves 2211, each first groove 2211 being embedded with a friction spring ring 2212, and the inner wall of the end of the first rod 221 that is connected to the electroscope bracket has one or more second grooves 2221, for example... Figure 7 As shown, two second grooves 2221 are formed on the inner wall of the upper end of the first rod 221. The second grooves 2221 are used to accommodate the friction spring coil 2212. The electroscope bracket 23 is inserted into the hollow first rod 221 and can move along the length of the first rod 221. This arrangement allows the electroscope bracket 23 to extend and retract within the first rod 221, improving the flexibility of the bracket assembly 2; at the same time, it prevents the electroscope bracket 23 from detaching from the first rod 221, improving the stability and reliability of the bracket assembly 2.

[0139] In one embodiment, such as Figure 1 As shown, the electroscope 1 includes a first housing 141 and a second housing 142 that are connected together, and a sealing ring 15 is provided between the first housing 141 and the second housing 142.

[0140] Specifically, the sealing ring 15 is arranged around the mating connection of the first housing 141 and the second housing 142 to prevent water or foreign objects from entering the inside of the voltage detector 1, thereby improving the sealing and waterproof performance of the voltage detector 1, ensuring that the voltage detector can operate stably even in a humid environment, avoiding signal distortion and battery loosening, and thus improving the reliability and durability of the voltage detector.

[0141] For example, the first housing 141 and the second housing 142 are made of high-strength engineering plastics or metal materials.

[0142] Optionally, such as Figure 1As shown, the first housing 141 or the second housing 142 is provided with an alarm buzzer 161, an alarm indicator light 162, an on / off button 163, an alarm voltage level indicator light 164, an alarm voltage level button 165, a bracket interface 166, a charging interface 167, and a charging indicator light 168.

[0143] Optionally, the voltage detector 1 also includes a camera module, which can remotely view the working status of the voltage detector 1 and the surrounding environment, which helps in the on-site condition assessment. At the same time, it can also record the working process in real time and transmit the video stream and voltage detection data to the remote device to provide visual reference for later analysis.

[0144] Optionally, the voltage detector 1 also includes a positioning module. The positioning module uses a positioning system such as GPS (Global Positioning System) or BeiDou system to locate the position of the voltage detector 1 in real time, and combines it with GIS (Geographic Information System) for easy management and scheduling. According to preset thresholds, the microprocessor determines whether the parameters in the voltage detection data have reached the alarm conditions, and sends the detection results and geographical location to a remote device in real time through the communication module 13.

[0145] Optionally, the voltage detector 1 also includes a high-capacity battery to support long-term field operations, and is equipped with fast charging to ensure continuous operation of the voltage detector.

[0146] In one specific embodiment, the method and operation procedure for using the voltage detection device include:

[0147] (1) Assemble the electroscope 1:

[0148] The anti-slip insulating sleeve 25 is fitted onto the outer surface of the handle 21;

[0149] The anti-slip insulating sleeve 25 is locked onto the handle 21 by the insulating plug 24;

[0150] The second rod 222, the first rod 221, and the voltage detector bracket 23 are sequentially and movably connected.

[0151] The electroscope 1 is connected to the electroscope bracket 23 by a threaded connection;

[0152] (2) Start the voltage tester 1:

[0153] Press the on / off button 163 on the tester 1;

[0154] Set an appropriate alarm voltage level;

[0155] (3) Non-contact voltage testing operation:

[0156] Bring the voltage tester 1 close to the electrical device under test;

[0157] The detection module 11 reads the electric field signal and processes it through the intelligent circuit module 12;

[0158] Based on the signal strength, the signal indication circuit 127 in the intelligent circuit module 12 controls the alarm buzzer 161 and the alarm indicator light 162 to sound an alarm.

[0159] Communication module 13 transmits the voltage detection data to a remote device for easy data analysis;

[0160] (4) Remote monitoring and data analysis:

[0161] The remote device receives the voltage testing data and analyzes it to guide subsequent operations.

[0162] After the voltage test is completed: Press the on / off button 163 on the voltage tester 1 to turn off the voltage tester 1, disassemble all parts and store them properly.

[0163] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0164] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0165] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An electroscope, characterized in that The electrostatic detection device comprises: The electrostatic detector (1) comprises a detection module (11), the detection module (11) comprises a first coil group (111) and a second coil group (112), the first coil group (111) comprises a plurality of series-connected coil pairs (1111), each coil pair (1111) comprises two differentially connected coils, and the second coil group (112) comprises a plurality of coils connected in star connection, and the first coil group (111) is arranged outside the second coil group (112).

2. The electroscope of claim 1, wherein, The first coil group (111) and the second coil group (112) are both multiple, and the multiple first coil groups (111) and the multiple second coil groups (112) are arranged in layers, respectively.

3. The electroscope of claim 1, wherein, The electrostatic detector (1) further comprises an intelligent circuit module (12), the intelligent circuit module (12) is electrically connected with the detection module (11), and the intelligent circuit module (12) comprises one or more of a signal tracking circuit (121), a filter circuit (122), a voltage doubling rectifier circuit (123), an operational amplifier circuit (124), a discharge circuit (125), a Schmitt trigger circuit (126) and a signal indicating circuit (127).

4. The electroscope of claim 3, wherein, The electrostatic detector (1) further comprises a communication module (13), the communication module (13) is electrically connected with the intelligent circuit module (12) and the detection module (11), respectively, and the communication module (13) is used for communication connection with a remote device.

5. The electroscope of claim 1, wherein, The detection module (11) further comprises a temperature sensor and a humidity sensor, the temperature sensor is used for detecting the ambient temperature, and the humidity sensor is used for detecting the ambient humidity.

6. The electroscope of claim 1, wherein, The electrostatic detection device further comprises a support assembly (2), the support assembly (2) comprises a handle (21), a working handle (22) and an electrostatic detector support (23) connected in sequence, the working handle (22) is of a telescopic structure, and the electrostatic detector support (23) is used for detachable connection with the electrostatic detector (1).

7. The electroscope of claim 6, wherein, The working handle (22) comprises a first rod body (221) and a second rod body (222), the first rod body (221) is inserted into the second rod body (222), and the first rod body (221) can move along the length direction of the second rod body (222); An outer wall of an end portion of the first rod body (221) is provided with a first groove (2211), a friction spring ring (2212) is embedded in the first groove (2211), an outer wall of an end portion of the second rod body (222) is provided with a second groove (2221), and the second groove (2221) is used for accommodating the friction spring ring (2212).

8. The electroscope of claim 7, wherein, The first groove (2211), the second groove (2221) and the friction spring ring (2212) are all multiple, and the multiple first grooves (2211), the multiple second grooves (2221) and the multiple friction spring rings (2212) are all distributed at intervals along the length direction of the working handle (22).

9. The electroscope of claim 6, wherein, The electrostatic detector support (23) is threadedly connected with the electrostatic detector (1).

10. The electroscope of claim 1, wherein, The electroscope (1) comprises a first housing (141) and a second housing (142) connected in opposition, a sealing ring (15) being arranged between the first housing (141) and the second housing (142).

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