Intelligent phase identification test pencil device

Abstract

The invention discloses an intelligent phase identification test pencil device which mainly comprises an instrument upper cover, an instrument lower cover, a battery cover plate, a circuit master controller and a line pressing terminal. The device is composed of three micro-volume intelligent phase sequence discrimination terminals, each terminal collects phase line induction voltage, a digital circuit converts sine alternating current voltage waveform into digital square waves, and each terminal automatically records a phase time sequence. The three terminals carry out wireless communication comparison on the measured phase time sequences, and finally, three corresponding phases A, B and C are intelligently identified; the device measures induced voltage, induced current passes through the differential amplification circuit, the program control bias amplifier and the absolute value filter circuit, and finally an output signal is subjected to AD conversion by the processor. Finally, the power grid phase sequence intelligent recognizer device is formed to assist manual work, and accurate difference of three-phase phase sequences and quick searching of electric leakage points are carried out, so that risks of human body electric shock, line tripping and the like are effectively reduced, and huge social benefits and economic benefits are generated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phase recognition, and particularly relates to a smart phase recognition test pen device. BACKGROUND

[0002] An important parameter in the application of three-phase alternating current in a power system is phase sequence. In the process of taking and connecting lines in a distribution network, and when a transformer is connected to a power grid, if alternating currents of different phases are connected, a serious safety accident will occur, which may cause a power outage, equipment damage and large-scale power outage, and bring inconvenience to life and property losses to local residents and enterprises, and affect the local economic development, and cause great losses to the power supply company. In addition, in a three-phase alternating current motor, if the phase sequence changes, it will directly affect the direction of the motor. Therefore, the measurement of the phase sequence is a very important parameter when operating the equipment. The current phase sequence detection device in the power industry is large in size and expensive, which is extremely not conducive to installation and use on site. The power grid phase sequence intelligent recognizer of the present application is used in the process of taking and connecting lines in a distribution network, has a bare wire terminal insulation function, and has a phase sequence intelligent recognition function. It can effectively prevent phase line connection errors, line short circuits and electric shock accidents during operation. SUMMARY

[0003] In view of the above technical deficiencies, the purpose of the present application is to provide a smart phase recognition test pen device, which forms a power grid phase sequence intelligent recognizer device to assist manual operation, accurately distinguish three-phase sequences, and quickly find leakage points.

[0004] To solve the above technical problems, the present application adopts the following technical scheme: the present application provides a smart phase recognition test pen device, which comprises:

[0005] An upper instrument cover;

[0006] A lower instrument cover, which is connected with the upper instrument cover to form a shell structure;

[0007] A circuit main control, which is arranged in the shell structure and is used for recognizing a phase; the circuit main control compares the measured phase time sequence through three micro-volume intelligent phase sequence discrimination terminals, and calculates the corresponding phase of each.

[0008] Preferably, the circuit main control further comprises an analog channel selector, a processor, a differential amplifier, a program-controlled bias amplifier and an A / D converter.

[0009] The analog channel selector obtains induced voltage and induced current through an induced voltage sensor and an induced current sensor, and outputs a signal through differential amplification, program-controlled bias amplification, A / D conversion by the processor, and display by a display device.

[0010] Preferably, the three micro-volume intelligent phase sequence discrimination terminals convert the sinusoidal alternating voltage waveform into a digital square wave by collecting phase line induced voltage, and automatically record the respective phase time sequence.

[0011] Preferably, the circuit master control is provided with a direction perception sensor.

[0012] The direction perception sensor is used to control the realization of picking up and starting, and putting down and shutting down without signal.

[0013] Preferably, the shell structure is also provided with a wire pressing terminal for connecting the wire.

[0014] Preferably, the head of the wire pressing terminal is an adaptive wire clamp.

[0015] Preferably, the shell structure is also provided with a battery compartment and a battery cover plate.

[0016] The beneficial effects of the present application are that: three micro-volume intelligent phase sequence discrimination terminals are composed, each terminal collects phase line induced voltage, digital circuit converts the sinusoidal alternating voltage waveform into a digital square wave, and each terminal automatically records the phase time sequence. The three terminals compare the measured phase time sequence through wireless communication, and finally intelligently identify the corresponding phase ABC; the device measures the induced voltage and induced current through the differential amplification circuit, program-controlled bias amplifier and absolute value filter circuit, and finally outputs the signal to the processor for AD conversion. Finally, the power grid phase sequence intelligent identifier device assists manual work, accurately distinguishes three-phase sequence, and quickly finds the leakage point. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0018] Figure 1 It is a structural schematic diagram of the present application.

[0019] Figure 2 It is a circuit master control schematic diagram of the present application.

[0020] Figure 3 It is a differential amplification circuit schematic diagram provided for the embodiment.

[0021] Figure 4 It is a program-controlled bias amplifier circuit schematic diagram provided for the embodiment.

[0022] Figure 5A / D conversion circuit schematic diagram provided for the embodiment.

[0023] Figure 6 Absolute value filter circuit schematic diagram provided for the embodiment.

[0024] Reference signs: 1 - instrument upper cover, 2 - instrument lower cover, 3 - battery cover plate, 4 - circuit main control, 5 - wire pressing terminal. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Embodiment: The present application provides a smart phase identification electrical tester device, mainly including five parts of instrument upper cover 1, instrument lower cover 2, battery cover plate 3, circuit main control 4, and wire pressing terminal 5, wherein the instrument upper cover 1 and the instrument lower cover 2 form the shell structure of the device.

[0027] The circuit main control 4 is arranged in the shell structure and is used for identifying the phase; the circuit main control 4 compares the measured phase time sequence through three micro-volume intelligent phase sequence discrimination terminals, and calculates the respective corresponding phases.

[0028] Among them, the three micro-volume intelligent phase sequence discrimination terminals convert the sinusoidal alternating voltage waveform into a digital square wave by collecting the phase line induced voltage, and automatically record the respective phase time sequence.

[0029] The circuit main control 4 further includes an analog channel selector, a processor, a differential amplifier, a program-controlled bias amplifier, and an A / D converter; the analog channel selector obtains the induced voltage and the induced current through the induced voltage sensor and the induced current sensor, and outputs the signal through the differential amplifier, the program-controlled bias amplifier, and the A / D conversion of the processor, and displays the signal through the display device; wherein the absolute value filter circuit is further arranged in the program-controlled bias amplifier.

[0030] There is no any key on the circuit main control 4 of the device, and the direction perception sensor is used to control the total power supply to be picked up to start up and to be put down to shut down without signal, and the static power consumption is designed to be not greater than 1.5V*0.2uA.

[0031] The wire pressing terminal 5 has a self-adaptive clamp at the head, and the phase line bare conductor terminal is inserted into the head of the smart phase identification electrical tester device to play the role of insulation and signal introduction.

[0032] In the embodiment, the inductive voltage sensor can adopt GAVI series or GDVI series voltage sensor;

[0033] The inductive current sensor can adopt BA series current sensor;

[0034] The differential amplification circuit can adopt operational amplifier such as LM324, LM358, etc. to build the differential amplification circuit; such as Figure 3 An implementation is shown in the figure;

[0035] The program-controlled bias amplification circuit can use general operational amplifier to build the program-controlled bias amplification circuit, and control the bias voltage through digital signal; such as Figure 4 An implementation is shown in the figure;

[0036] The A / D conversion circuit can use high-performance A / D conversion device such as MC14433; such as Figure 5 An implementation is shown in the figure;

[0037] The processor can be STM32 series single-chip microcomputer;

[0038] The absolute value filter circuit is realized through operational amplifier and diode; such as Figure 6 An implementation is shown in the figure.

[0039] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technology, the present application also intends to include these modifications and variations.

Claims

1. A smart phase recognition test pen device, characterized in that, include: Instrument cover (1); The lower cover (2) of the instrument is connected to the upper cover (1) of the instrument to form a shell structure; The main circuit controller (4) is set inside the housing structure and is used to identify the phase. The main circuit controller (4) compares the measured phase time sequence wirelessly through three micro-volume intelligent phase sequence discrimination terminals and calculates the corresponding phase of each terminal.

2. The intelligent phase recognition test pen device as described in claim 1, characterized in that, The main control circuit (4) also includes an analog channel selector, a processor, a differential amplifier, a programmable bias amplifier, and an A / D converter; The analog channel selector obtains induced voltage and induced current through induced voltage and induced current sensors. After differential amplification and programmable bias amplification, the output signal is converted by the processor and displayed through the display device.

3. The intelligent phase recognition test pen device as described in claim 1, characterized in that, The three micro-volume intelligent phase sequence discrimination terminals collect the phase line induced voltage, convert the sinusoidal AC voltage waveform into a digital square wave, and automatically record their respective phase time sequences.

4. The intelligent phase recognition test pen device as described in claim 1, characterized in that, A direction sensing sensor is provided on the main control circuit (4); The orientation sensor is used to control the device to turn on when picked up and to turn off when put down if there is no signal.

5. The intelligent phase recognition test pen device as described in claim 1, characterized in that, The housing structure is also equipped with a wire terminal (5) for connecting wires.

6. The intelligent phase recognition test pen device as described in claim 5, characterized in that, The head of the wire clamp (5) is an adaptive wire clamp.

7. The intelligent phase recognition test pen device as described in claim 1, characterized in that, The shell structure is also provided with a battery compartment and a battery cover (3).

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