Non-contact voltage clamp and voltage measuring system

Abstract

The utility model discloses a non-contact voltage clamp and a voltage measurement system, and the non-contact voltage clamp is provided with an insulating housing, a measurement pole piece, a telescoping measurement fixing assembly, a circuit substrate, and a wire protection pipe assembly. The telescopic measurement fixing assembly is movably connected with the insulation shell, the measurement pole piece is fixedly attached to the outer surface of the first side face of the insulation shell, the insulation shell is provided with a cavity, a circuit substrate is arranged in the cavity, the circuit substrate is provided with an amplification filter circuit, and the conduit assembly is connected with the second side face of the insulation shell. A target measurement object is clamped and attached to the measurement pole piece through the telescopic side measurement fixing assembly, the measurement pole piece obtains a voltage signal, the voltage signal is filtered and amplified through the amplification filter circuit, and the amplified and filtered voltage signal is output to an external target device through the conduit assembly. The technical problems that potential safety hazards exist in measurement of the voltage of the power supply line and voltage measurement equipment cannot perform effective measurement in a limited space in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to voltage measurement equipment technical field especially is related to a non -contact voltage clamp and voltage measurement system. BACKGROUND

[0002] With the rapid development of power grid construction, in order to ensure the stability of power supply, voltage measurement needs to be carried out on power transmission line in power transmission inspection, fault repair. In the related art, voltage measurement usually needs to directly contact the circuit, which not only has great safety hazards, and in the scene of limited measurement space, the measuring personnel are difficult to carry out measurement work.

[0003] Therefore, how to solve the safety hazards existing in the related art when measuring the voltage of the power supply line and the technical problem that the voltage measurement equipment cannot effectively measure in the limited space become the technical problems that the technical personnel in the field need to overcome. UTILITARY MODEL

[0004] The utility model provides a kind of non-contact voltage clamp and voltage measurement system, to solve the technical problems of poor safety and poor applicability of voltage measurement in the related art.

[0005] A kind of non-contact voltage clamp in the utility model, it includes:

[0006] Insulating shell, the insulating shell is provided with cavity;

[0007] Measuring pole piece, fixedly attached to the outer surface of the first side surface of the insulating shell;

[0008] Telescopic measurement fixed assembly, movably connected with the insulating shell, for target measurement object clamp attached on the measuring pole piece;

[0009] Circuit board, fixedly set in the cavity, the circuit board is provided with amplification filter circuit, the amplification filter circuit is electrically connected with the measuring pole piece, for the voltage signal obtained by the measuring pole piece is amplified and filtered and exported;

[0010] Wire protection tube assembly, connect with the second side surface of the insulating shell, for the output of the voltage signal amplified and filtered to external target equipment.

[0011] The utility model embodiment a kind of non-contact voltage clamp at least has the following beneficial effects:

[0012] The utility model discloses an embodiment of a non - contact voltage tongs, be provided with insulating casing, measurement pole piece, telescopic measurement fixed subassembly, circuit board and wire protection tube subassembly, wherein, telescopic measurement fixed subassembly with insulating casing movable connection, measurement pole piece fixedly attached to the outer surface of the first side of insulating casing, and insulating casing is provided with cavity, and the cavity is provided with circuit board, and circuit board is provided with amplification filter circuit, and wire protection tube subassembly is connected with the second side of insulating casing, it is through telescopic side measurement fixed subassembly and is attached to the measurement pole piece after target measurement object pincers, and measurement pole piece obtains voltage signal and is used for the voltage signal of measurement pole piece through amplification filter circuit and is filtered and amplified, and then wire protection tube subassembly is outputted to external target equipment after the voltage signal of amplification filter, and further solve the security risk that exists when the voltage of power supply line is measured in the related art and the technical problem that voltage measuring equipment can not effectively measure in limited space, provide a kind of safety, and the non - contact voltage tongs of strong applicability has high security.

[0013] According to the non-contact voltage tongs of some other embodiments of the utility model, the telescopic measurement fixed subassembly includes spring piece, chuck link, mobile key block;

[0014] The spring piece is arranged in the cavity, one end of the spring piece is fixed on the fixed structure in the cavity, and the other end of the spring piece is connected with the first end of the chuck link.

[0015] The mobile key block is embedded on the upper surface of the insulating casing, and when the mobile key block is pushed by external force, it moves horizontally on the upper surface of the insulating casing, so that the spring piece is in a working state to drive the horizontal part of the chuck link to move in the limiting assembly of the cavity, so that the chuck part of the chuck link clamps and attaches the target measurement object on the measurement pole piece.

[0016] According to the non-contact voltage tongs of some other embodiments of the utility model, the insulating casing is provided with a recess;

[0017] The recess is arranged in the lower region of the insulating casing and adjacent to the first side of the insulating casing.

[0018] According to the non-contact voltage tongs of some other embodiments of the utility model, the first side of the insulating casing is provided with a groove part, and the measurement pole piece is fixedly arranged on the outer surface of the groove part.

[0019] The chuck part of the chuck link is used to clamp the target measurement object to the groove part, so that the target measurement object is attached to the measurement pole piece.

[0020] According to the non-contact voltage tongs of some other embodiments of the utility model, the circuit board includes an FPC board.

[0021] The amplification filter circuit comprises a signal amplification circuit and a filter circuit, both of which are arranged on the FPC board;

[0022] The measuring electrode is electrically connected to the input end of the signal amplification circuit, the output end of the signal amplification circuit is electrically connected to the output end of the filter circuit, and the output end of the filter circuit is electrically connected to an external target device.

[0023] According to the non-contact voltage clamp of some other embodiments of the utility model, the signal amplification circuit comprises a first amplifier, a first resistor, a second resistor and a third resistor; the filter circuit comprises a first capacitor;

[0024] One end of the first resistor is electrically connected to the measuring electrode, the other end of the first resistor is respectively connected to one end of the second resistor and the inverting input end of the first amplifier, the non-inverting input end of the first amplifier is connected to a power supply ground, the other end of the second resistor is respectively connected to the output end of the first amplifier and one end of the third resistor, the other end of the third resistor is respectively connected to one end of the first capacitor and an external target device, and the other end of the first capacitor is connected to a power supply ground.

[0025] According to the non-contact voltage clamp of some other embodiments of the utility model, the wire protection tube assembly comprises a flexible connecting tube sleeve and a wire tube;

[0026] One end of the flexible connecting tube sleeve is connected to the second side surface of the insulating shell, the other end of the flexible connecting tube sleeve is connected to one end of the wire tube, and the other end of the wire tube is used for being connected to an external target device.

[0027] According to the non-contact voltage clamp of some other embodiments of the utility model, the lower surface of the insulating shell is provided with first anti-skid stripes.

[0028] According to the non-contact voltage clamp of some other embodiments of the utility model, the stress surface of the movable key block is provided with second anti-skid stripes.

[0029] In the second aspect, the utility model embodiment further provides a contact type voltage measurement system, which comprises a signal processing module, a display module and the non-contact voltage clamp as described above;

[0030] The non-contact voltage clamp is electrically connected to the signal processing module, and the signal processing module is electrically connected to the display module.

[0031] The non-contact voltage clamp is used for acquiring a voltage signal of a target measurement object and transmitting the voltage signal to the signal processing module after amplification and filtering, and the signal processing module displays a voltage value corresponding to the voltage signal on the display module. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a specific embodiment of the utility model of a non-contact voltage clamp three-dimensional structure schematic diagram;

[0033] Figure 2 is a specific embodiment of the utility model of a non-contact voltage clamp spring piece 210 compression state when the cross-sectional structure schematic diagram;

[0034] Figure 3 is a specific embodiment of the utility model of a non-contact voltage clamp spring piece 210 free state when the cross-sectional structure schematic diagram;

[0035] Figure 4 is a specific embodiment of the utility model of a non-contact voltage clamp amplification filter circuit circuit structure schematic diagram;

[0036] Figure 5 is a specific embodiment of the utility model of a non-contact voltage measurement system module composition schematic diagram. DETAILED DESCRIPTION

[0037] The utility model will be described below with the embodiment to the conception and the technical effect of generating clearly, completely, so that the purpose, characteristics and effect of the utility model are fully understood. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all embodiments, based on the embodiment of the utility model, the other embodiments obtained by the skilled in the art without creative labor are all within the scope of the utility model protection.

[0038] In the description of the embodiment of the utility model, if it involves "several", its meaning is more than one, if it involves "multiple", its meaning is more than two, if it involves "greater than", "less than", "exceed", should be understood as not including the number, if it involves "above", "below", "within", should be understood as including the number. If it involves "first", "second", should be understood as distinguishing technical features, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0039] REFERENCE Figures 1 to 3The utility model embodiment provides a kind of non-contact voltage clamp, it includes insulating shell 100, telescopic measurement fixed component 200, circuit substrate (not shown in drawing, setting in the cavity of insulating shell 100), measurement pole piece 300 and wire protection tube component 400;Wherein, telescopic measurement fixed component 200 is movably connected with insulating shell 100, measurement pole piece 300 is fixedly attached to the outer surface of the first side surface of insulating shell 100, and then telescopic measurement fixed component 200 clamps and attaches target measurement object 110 on measurement pole piece 300, so that measurement pole piece 300 obtains the voltage signal of target measurement object;Measurement pole piece 300 transmits voltage signal to amplification filter circuit and is output to external target equipment after amplification filtering, and then the voltage value of target measurement object is obtained according to receiving amplified and filtered voltage signal by external target equipment.In the embodiment, by setting telescopic measurement fixed component 200 for clamping and attaching target measurement object on measurement pole piece 300, and the voltage signal obtained is amplified and filtered and output to external target equipment, so that operating personnel can also accurately and safely measure the voltage value of target measurement object without contacting live target measurement object, and fast measurement can also be realized in the scene that measurement space is limited, the technical problems that safety hazard exists when voltage of power supply line is measured in the related art and voltage measurement equipment cannot effectively measure in limited space are solved.

[0040] Referring to Figure 2 And Figure 3 In some embodiments, telescopic measurement fixed component 200 includes spring piece 210, chuck connecting rod 220 and movable button block 230;Wherein, spring piece 210 is set in the cavity of insulating shell 100, one end of spring piece 210 is fixed on fixed structure 110 in the cavity, the other end of spring piece 210 is fixedly connected with the first end of chuck connecting rod 220, spring piece 210 is positioned in the cavity by limiting tube 120 to limit spring piece 210, spring piece 210 is sleeved on limiting tube 120, to prevent spring piece 210 from deviating position when force changes, so that the problem that chuck connecting rod 220 cannot work normally is caused;Movable button block 230 is embedded and set on the upper surface of insulating shell 100, when movable button block 230 receives external force and is pushed, it moves horizontally and transversely on the upper surface of insulating shell 100 towards the first side surface direction, at this time, spring piece 210 is compressed to make it in working state, then drive the horizontal part of chuck connecting rod 220 to move in the limiting assembly (for limiting the horizontal part of chuck connecting rod 220) of the cavity, and after target measurement object 500 is attached on measurement pole piece 300, slowly loosen movable button block 230, finally make target measurement object 500 be clamped and attached on measurement pole piece 300 by the chuck part of chuck connecting rod 220, to realize accurate and safe measurement of target measurement object 500.

[0041] With reference to Figure 2 And Figure 3 In some embodiments, in order to stably and reliably clamp the target measurement object 500 to the measurement pole 300. In this embodiment, the first side of the insulating shell 100 is provided with a groove portion 130, and the measurement pole 300 is fixedly arranged on the outer surface of the groove portion 130. Further, when measuring the voltage value of the target measurement object 500, the target measurement object 500 is clamped and fixedly attached to the groove portion 130 by the clamp head of the clamp link 220, so that the target measurement object 500 is tightly attached to the measurement pole 300, preventing the problem of inaccurate measurement caused by the target measurement object 500 deviating during measurement.

[0042] With reference to Figures 1 to 3 In some embodiments, in order to make the overall appearance of the non-contact voltage clamp proposed in the embodiments of the present application beautiful, and to facilitate the related measurement personnel to push the movable key block 230 when using it, the insulating shell 100 is also provided with a recessed portion 140 in this embodiment. Wherein, the recessed portion 140 is arranged in the lower region of the insulating shell 100, and the recessed portion 140 is adjacent to the first side. Further, the related measurement personnel provides a good grip when using the non-contact voltage clamp proposed in the embodiments of the present application.

[0043] With reference to Figure 2 And Figure 3 In some embodiments, in order to facilitate the related measurement personnel to push the movable key block 230, and to provide a good use feeling for the related measurement personnel, in this embodiment, the lower surface of the insulating shell is provided with a first anti-skid stripe 150, and the stress surface of the movable key block 230 is provided with a second anti-skid stripe 231. The first anti-skid stripe 150 and the second anti-skid stripe 2231 are arranged to prevent the related measurement personnel from slipping when pushing the movable key block 230.

[0044] In some embodiments, in order to realize stable and accurate transmission of the voltage signal of the target measurement object 500 obtained by the measurement pole 300, the circuit substrate in this embodiment includes an FPC board, which is fixedly arranged in the cavity of the insulating shell 100. Wherein, the amplification filter circuit includes a signal amplification circuit and a filter circuit, which are arranged on the FPC board. The input end of the signal amplification circuit is electrically connected with the measurement pole 300, the output end of the signal amplification circuit is electrically connected with the input end of the filter circuit, and the output end of the filter circuit is electrically connected with the external target device. In this embodiment, the signal amplification circuit is arranged to amplify the voltage signal obtained by the measurement pole 300, and the filter circuit is arranged to filter the amplified voltage signal, so that the voltage signal output to the external target device is stable and reliable, and the voltage value of the target measurement object 500 can be measured more accurately.

[0045] With reference to Figure 4In a specific embodiment, the signal amplification circuit includes a first amplifier U1, a first resistor R1, a second resistor R2 and a third resistor R3; the filter circuit includes a first capacitor C1. Wherein one end of the first resistor R1 is electrically connected with the measuring electrode 300, the other end of the first resistor R1 is respectively connected with one end of the second resistor and the inverting input terminal of the first amplifier U1, the non-inverting input terminal of the first amplifier U1 is connected with the power supply ground, the other end of the second resistor R2 is respectively connected with the output terminal of the first amplifier U1 and one end of the third resistor R3, the other end of the third resistor R3 is respectively connected with one end of the first capacitor C1 and the external target device, and the other end of the first capacitor C1 is connected with the power supply ground. In this embodiment, the voltage signal obtained by the measuring electrode 300 is amplified and filtered and then output to the target external device, thereby ensuring that the target external device can receive accurate and reliable voltage signals, and then measuring the voltage value of the target object 500 to be measured.

[0046] With reference to Figure 2 and Figure 3 In some embodiments, in order to conveniently transmit the amplified and filtered voltage signal to the target external device, in this embodiment, the wire protection tube assembly 400 includes a flexible connection tube sleeve 410 and a wire tube 420, one end of the flexible connection tube sleeve 410 is connected with the second side of the insulating shell 100, the other end of the flexible connection tube sleeve 410 is connected with the wire tube 420, and the other end of the wire tube 420 is connected to the external target device. In this embodiment, the signal transmission line for transmitting the amplified and filtered voltage signal is arranged in the flexible connection tube sleeve 410 and the wire tube 420, and when the other end of the wire tube 420 is connected to the external target device, the signal transmission line in the wire tube 420 can be electrically connected with the external target device, thereby transmitting the amplified and filtered voltage signal to the external target device, and realizing accurate and convenient measurement of the voltage value of the target measuring object 500.

[0047] With reference to Figure 5The utility model embodiment further provides a non -contact voltage measurement system, it includes signal processing module, display module and as any embodiment above set out non -contact voltage clamp, wherein non -contact voltage clamp and signal processing module electric connection, signal processing module and display module electric connection, non -contact voltage clamp is provided with the measurement pole piece, it is used for after clamping target measurement object, obtains the voltage signal of target measurement object through coupling induction principle, and the voltage signal is amplified, filtered and then output to signal processing module, signal processing module obtains the voltage value of target measurement object according to the voltage signal received, and control display module shows voltage value. In the embodiment, by setting up non -contact voltage clamp, it has solved the security risk that exists when measuring the voltage of power supply line in the related art and the technical problem that voltage measurement equipment can not effectively measure in the limited space, provided a kind of non -contact voltage measurement system with high safety, strong applicability.

[0048] In some specific embodiments, the signal processing module described in the above embodiments can be an MCU loaded with a preset program, and the display module can be an LCD display screen. Furthermore, after the MCU receives the amplified and filtered voltage signal transmitted by the non-contact voltage clamp, the voltage value of the target measurement object is obtained according to the received voltage signal, and the voltage value is sent to the LCD display screen for display.

[0049] The utility model embodiment has been described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the utility model. In addition, the embodiments and features in the embodiments of the utility model can be combined with each other without conflict.

Claims

1. A non-contact voltage clamp, characterized by, The utility model relates to a kind of voltage measurement device, including: Insulating shell, the insulating shell is provided with cavity; Measuring pole piece, fixedly attached to the outer surface of the first side surface of the insulating shell; Telescopic measurement fixed assembly, movably connected with the insulating shell, for target measurement object clamp attached to the measuring pole piece; Circuit substrate, fixedly arranged in the cavity, the circuit substrate is provided with amplification filter circuit, the amplification filter circuit is electrically connected with the measuring pole piece, for the voltage signal obtained by the measuring pole piece is amplified and filtered and then output; Wire protection tube assembly, connected with the second side surface of the insulating shell, for the voltage signal amplified and filtered and then output to external target equipment.

2. The contactless voltage clamp of claim 1, wherein, The telescopic measurement fixed assembly includes spring piece, chuck link, moving key block; The spring piece is arranged in the cavity, one end of the spring piece is fixed on the fixed structure in the cavity, the other end of the spring piece is connected with the first end of the chuck link; The moving key block is embedded in the upper surface of the insulating shell, when the moving key block is pushed by external force, it moves horizontally on the upper surface of the insulating shell, so that the spring piece is in working condition to drive the horizontal part of the chuck link to move in the limiting assembly of the cavity, so that the chuck part of the chuck link clamps the target measurement object attached to the measuring pole piece.

3. Non-contact voltage tongs according to claim 1 or 2, characterized in that The insulating shell is provided with recessed part; The recessed part is arranged in the lower area of the insulating shell, adjacent to the first side surface of the insulating shell.

4. The non-contact voltage tongs of claim 2, wherein, The first side surface of the insulating shell is provided with groove part, and the measuring pole piece is fixedly arranged on the outer surface of the groove part; The chuck part of the chuck link is used to clamp the target measurement object to the groove part, so that the target measurement object is attached to the measuring pole piece.

5. The contactless voltage clamp of claim 1 or 2, wherein, The circuit substrate includes FPC board; The amplification filter circuit includes signal amplification circuit and filter circuit, which are arranged on the FPC board; The measuring pole piece is electrically connected with the input end of the signal amplification circuit, the output end of the signal amplification circuit is electrically connected with the output end of the filter circuit, and the output end of the filter circuit is electrically connected with external target equipment.

6. The contactless voltage clamp of claim 5, wherein, The signal amplification circuit includes first amplifier, first resistor, second resistor and third resistor, and the filter circuit includes first capacitor; One end of the first resistor is electrically connected with the measuring pole piece, the other end of the first resistor is respectively connected with one end of the second resistor and the inverting input end of the first amplifier, the non-inverting input end of the first amplifier is connected with power supply ground, the other end of the second resistor is respectively connected with the output end of the first amplifier and one end of the third resistor, the other end of the third resistor is respectively connected with one end of the first capacitor and external target equipment, and the other end of the first capacitor is connected with power supply ground.

7. The contactless voltage clamp of claim 1 or 2, wherein, The wire protection tube assembly includes flexible connecting tube sleeve and wire tube; One end of the flexible connecting tube sleeve is connected with the second side surface of the insulating shell, the other end of the flexible connecting tube sleeve is connected with one end of the wire tube, and the other end of the wire tube is used to connect to external target equipment.

8. The contactless voltage clamp of claim 1 or 2, wherein, The lower surface of the insulating shell is provided with first anti-skid stripes.

9. The contactless voltage clamp of claim 2, wherein, The force receiving surface of the movable key block is provided with second anti-skid stripes.

10. A non-contact voltage measurement system characterized by, The non-contact voltage clamp, the signal processing module, and the display module are connected in series. The non-contact voltage clamp and the signal processing module are electrically connected, and the signal processing module and the display module are electrically connected. The non-contact voltage clamp is used to acquire a voltage signal of a target measurement object, amplify and filter the voltage signal, and then transmit the voltage signal to the signal processing module. The signal processing module displays the voltage value corresponding to the voltage signal on the display module.

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