Electrical testing device for skills training

Abstract

The present invention discloses an electrical testing device for skill training. The electrical testing device for skill training of the present invention comprises a signal oscillation sounding unit and a simulation electrical testing unit; the signal oscillation sounding unit comprises a wireless remote control switch, a wireless receiver, and a fixed frequency signal generator; the wireless remote control switch and the wireless receiver are connected by radio; the fixed frequency signal generator is used to generate a sound wave signal of a set frequency; the simulation electrical testing unit comprises a self-test module and a fixed frequency signal sensing module; the self-test module and the fixed frequency signal sensing module; the fixed frequency signal sensing module is used to sense the sound wave signal of the set frequency generated by the fixed frequency signal generator. The present invention is used to realize the function of simulating the interaction between the high-voltage equipment of the power grid and the high-voltage electrical tester with a low-voltage device, and conducting skill training for electricians under a safe voltage.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment for electrician skill training, and specifically relates to an electric testing device for skill training. Background Art

[0002] The electric test device is mainly used to detect high-voltage lines and check whether the high-voltage lines are energized. When detecting lines with high voltage, the high-voltage tester will emit a beeping, beeping, beeping warning sound and a flashing LED warning light, so that electricians can sense the current working status of the line and provide a reference for their daily work.

[0003] However, the existing high-voltage live equipment is difficult to control safely and is difficult to use for skills training. In a production environment, cable lines and transformers carry high voltage electricity, which makes it difficult to safely conduct skills training. In addition, the high-voltage testers used in production cannot work properly under the safety voltage required by skills training, and cannot issue corresponding sound and light warnings during electricity testing. Even electricians who receive skills training cannot intuitively feel the working status of the tester when the cable is live. Summary of the invention

[0004] In order to overcome one or more defects and shortcomings of the prior art, the purpose of the present invention is to provide a device for simulating the interaction between high-voltage equipment in the power grid and a high-voltage tester with a low-voltage device, and for training electricians under a safe voltage.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions.

[0006] An electrical testing device for skill training, comprising a signal oscillation sound generating unit and a simulation electrical testing unit;

[0007] The signal oscillation sound generating unit is used to generate a sound wave signal of a set frequency; the analog electric test unit is used to sense the sound wave signal of a set frequency generated by the signal oscillation sound generating unit and give an audible and visual alarm;

[0008] The signal oscillation sound generating unit includes a wireless remote control switch, a wireless connection receiver, a control relay, a voltage reduction module, a fixed frequency signal generator, and a first battery;

[0009] The wireless remote control switch is connected to the wireless receiver via radio signals;

[0010] The first battery is electrically connected to the wireless receiver, the voltage reduction module, and the control relay respectively;

[0011] The wireless receiver is electrically connected to the control relay;

[0012] The fixed frequency signal generator is electrically connected to the control relay and the step-down module respectively;

[0013] The fixed frequency signal generator is used to generate a sound wave signal of a set frequency;

[0014] The analog electric test unit includes a second battery, a self-test module, a fixed frequency signal sensing module, an optical coupler, a speaker S1, two light emitting diodes, and a resistor R1;

[0015] The second battery is electrically connected to the self-test module, the fixed frequency signal sensing module, the speaker S1, and the light emitting diode respectively;

[0016] The self-test module is electrically connected to the fixed frequency signal sensing module and the optical coupler respectively;

[0017] The two light emitting diodes are LED1 and LED2;

[0018] The optical coupler is electrically connected to one end of the resistor R1;

[0019] The other end of the resistor R1 is respectively connected to one end of the speaker S1, one end of the light emitting diode LED1, and one end of the light emitting diode LED2; the other end of the speaker S1, the other end of the light emitting diode LED1, and the other end of the light emitting diode LED2 are respectively connected to the negative electrode of the second battery;

[0020] Speaker S1 is used for sound warning, LED1 and LED2 are used for light warning respectively;

[0021] The fixed frequency signal sensing module is electrically connected to the optical coupler; the fixed frequency signal sensing module is used to sense the sound wave signal of the set frequency generated by the fixed frequency signal generator.

[0022] Preferably, the wireless remote control switch includes an antenna P1, an RF112B chip, a capacitor C1, a resistor R2, a resistor R3, a button D0, a button D1, a button D2, a button D3, and a light emitting diode LED3;

[0023] The RF112B chip is used to generate radio signals; the RF112B chip is provided with a GND pin, a PAOUT pin, an LED pin, a P3 pin, a P0 pin, a P1 pin, a P2 pin, and a VDD pin; the GND pin is connected to the negative electrode of an external DC power supply, the PAOUT pin is connected to one end of the antenna P1, the LED pin is connected to one end of the resistor R2, the P3 pin is connected to one end of the button D0, the P2 pin is connected to one end of the button D1, the P1 pin is respectively connected to one end of the button D2 and one end of the button D3, the P0 pin is connected to the other end of the button D3, and the VDD pin is respectively connected to one end of the resistor R3 and one end of the capacitor C1;

[0024] Antenna P1 is used for transmitting radio signals; the other end of antenna P1 is connected to one end of capacitor C1;

[0025] The other end of the capacitor C1 is connected to the GND pin; the other end of the resistor R2 is connected to the anode of the light emitting diode LED3; the cathode of the light emitting diode LED3 is connected to the negative electrode of the external DC power supply;

[0026] One end of the resistor R3 is respectively connected to the other end of the button D0 , the other end of the button D1 , and the other end of the button D2 , and the other end of the resistor R3 is connected to the positive electrode of the external DC power supply.

[0027] Furthermore, the wireless link receiver includes an antenna P2, an RF112B chip, a capacitor C2, a capacitor C3, a reed switch relay KR, a resistor R4, a resistor R5, a resistor R6, and a light emitting diode LED4;

[0028] The RF112B chip is used to generate a radio signal; the RF112B chip is provided with a GND pin, a PAOUT pin, an LED pin, a P3 pin, a P0 pin, a P1 pin, a P2 pin, and a VDD pin; the GND pin is connected to the negative electrode of the first battery, the PAOUT pin is connected to one end of the antenna P2, the LED pin is connected to one end of the resistor R4, the P3 pin is connected to one end of the resistor R6, the P2 pin and / or the P1 pin are connected to the control relay, the P0 pin is connected to one end of the reed switch relay KR, and the VDD pin is respectively connected to one end of the resistor R6 and one end of the capacitor C2;

[0029] Antenna P2 is used to connect and receive radio signals; the other end of antenna P2 is connected to one end of capacitor C2;

[0030] The other end of the capacitor C2 is connected to the GND pin; the other end of the resistor R4 is connected to the anode of the light emitting diode LED4; the cathode of the light emitting diode LED4 is connected to the negative electrode of the first battery;

[0031] The other end of the reed switch relay KR is connected to one end of the capacitor C3 and one end of the resistor R5 respectively; one end of the capacitor C3 and one end of the resistor R5 are connected to one end of the resistor R6 respectively;

[0032] The other end of the resistor R6 is connected to the positive electrode of the first battery.

[0033] Further, the step-down module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, resistor R7, resistor R8, adjustable resistor R9, resistor R10, transistor VT1, and diode D1;

[0034] One end of the capacitor C4 is connected to the positive electrode of the first battery, and the other end is connected to the negative electrode of the first battery; one end of the capacitor C5 is connected to one end of the capacitor C4, and the other end is connected to the other end of the capacitor C4;

[0035] One end of the resistor R7 is connected to one end of the capacitor C4, and the other end is connected to the base of the transistor VT1; the collector of the transistor VT1 is connected to one end of the resistor R7, and the emitter is connected to one end of the resistor R8; the cathode of the diode D1 is connected to the base of the transistor VT1, and the anode is connected to the other end of the capacitor C5; one end of the capacitor C6 is connected to the base of the transistor VT1, and the other end is connected to one end of the resistor R10; the other end of the resistor R8 is connected to one end of the adjustable resistor R9; the other end of the adjustable resistor R9 is connected to one end of the resistor R10; the other end of the resistor R10 is connected to the other end of the capacitor C5;

[0036] One end of the capacitor C7 is connected to one end of the resistor R8, and the other end is connected to the other end of the resistor R10;

[0037] One end of the capacitor C8 is connected to one end of the capacitor C7, and the other end is connected to the other end of the capacitor C7; one end of the capacitor C8 is connected to the control relay, and the other end is connected to the negative electrode of the first battery.

[0038] Further, the self-test module includes a self-test switch SW1, a diode D2, a speaker S2, a transistor VT2, a transistor VT3, a transistor VT4, a transistor VT5, an operational amplifier IC1, an operational amplifier IC2, an operational amplifier IC3, an operational amplifier IC4, an operational amplifier IC5, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, and a resistor R19;

[0039] One end of the self-test switch SW1 is connected to the positive electrode of the second battery, and the other end is connected to one end of the capacitor C9, and the other end of the capacitor C9 is connected to the negative electrode of the second battery;

[0040] One end of the resistor R11 is connected to one end of the capacitor C9, and the other end is connected to the other end of the capacitor C9; one end of the resistor R12 is connected to one end of the capacitor C9, and the other end is connected to one end of the resistor R13; the other end of the resistor R13 is connected to the other end of the capacitor C9; one end of the capacitor C10 is connected to one end of the resistor R13, and the other end is connected to the other end of the resistor R13;

[0041] One end of the resistor R14 is connected to one end of the capacitor C10, and the other end is respectively connected to two input pins of the operational amplifier IC1; the output pin of the operational amplifier IC1 is respectively connected to two input pins of the operational amplifier IC2; the output pin of the operational amplifier IC2 is respectively connected to one end of the resistor R15, one end of the resistor R16, and one input pin of the operational amplifier IC3; the other input pin of the operational amplifier IC3 is connected to one end of the resistor R17, and the output pin is respectively connected to two input pins of the operational amplifier IC4; the output pin of the operational amplifier IC4 is connected to one end of the resistor R19;

[0042] The other end of the resistor R15 is connected to the other end of the capacitor C10; the other end of the resistor R16 is connected to the base of the transistor VT2; the emitter of the transistor VT2 is connected to the other end of the resistor R15, and the collector of the transistor VT2 is connected to one end of the capacitor C12; the other end of the capacitor C12 is connected to the positive electrode of the power supply;

[0043] One end of the capacitor C12 is connected to an input pin of the operational amplifier IC5, and the other end is respectively connected to one end of the speaker S2 and another input pin of the operational amplifier IC4; the output pin of the operational amplifier IC5 is connected to the base of the transistor VT3;

[0044] The collector of transistor VT3 is connected to the other end of speaker S2, and the emitter is connected to the emitter of transistor VT2;

[0045] The other end of the resistor R19 is connected to the base of the transistor VT4; the anode of the diode D2 is connected to the other end of the capacitor C12, and the cathode is connected to the collector of the transistor VT4; the collector of the transistor VT4 is connected to the collector of the transistor VT5, and the emitter of the transistor VT4 is connected to the base of the transistor VT5; the emitter of the transistor VT5 is connected to the emitter of the transistor VT3;

[0046] The anode of the diode D2 is connected to the fixed frequency signal sensing module and the optical coupler respectively, and the emitter of the transistor VT5 is connected to the fixed frequency signal sensing module and the optical coupling module respectively.

[0047] Further, the fixed frequency signal generator includes a low frequency square wave circuit, an audio generating circuit, a carrier circuit, a modulation circuit, a transistor VT6, a resistor R20, a resistor R21, and a sound wave signal transmitter K3;

[0048] One end of the low-frequency square wave circuit is connected to the control relay, the other end is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to one end of the resistor R20; one end of the resistor R21 is respectively connected to the other end of the resistor R20 and the base of the transistor VT6; the low-frequency square wave circuit is used to generate a square wave electrical signal to control the operation of the audio generation circuit and the carrier circuit; the collector of the transistor VT6 is connected to the control relay, and the emitter is connected to one end of the audio generation circuit;

[0049] The other end of the audio generating circuit is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to an input port of the modulation circuit; the audio generating circuit is used to generate electrical signals corresponding to multiple sound wave signals of specific frequencies;

[0050] One end of the carrier circuit is connected to the emitter of transistor VT6, the other end is connected to the other end of capacitor C8 in the step-down module, and the other end is connected to another input port of the modulation circuit; the carrier circuit is used to provide a baseband signal for modulating the electrical signal corresponding to the sound wave signals of multiple specific frequencies;

[0051] The connection electrical port of the modulation circuit is connected to the other end of the capacitor C8 in the step-down module, and the output port is connected to the sound wave signal transmitter K3; the modulation circuit is used to load the electrical signal generated by the audio generating circuit to the baseband signal generated by the carrier circuit to form a sound wave signal of a set frequency; the sound wave signal transmitter K3 is used to transmit the sound wave signal of the set frequency.

[0052] Further, the fixed frequency signal sensing module includes a pickup coil K1, a magnetic earphone coil K2, a switch SW2, an operational amplifier IC6, a transistor VT7, a transistor VT8, a diode D3, a diode D4, a capacitor C13, a capacitor C14, a resistor R22, an adjustable resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, and a resistor R30;

[0053] One end of the switch SW2 is connected to the positive electrode of the second battery, and the other end is connected to one end of the resistor R24; the other end of the resistor R24 ​​is respectively connected to one end of the capacitor C13, one end of the resistor R26, one end of the resistor R25, and one end of the pickup coil K1; the other end of the capacitor C13 is connected to the negative electrode of the second battery, the other end of the resistor R26 is connected to the negative electrode of the second battery, the other end of the resistor R25 is connected to an input pin of the operational amplifier IC6, and the other end of the pickup coil K1 is connected to another input pin of the operational amplifier IC6; one control pin of the operational amplifier IC6 is connected to the negative electrode of the second battery, and the other control pin is connected to the other end of the switch SW2;

[0054] One end of the magnetic earphone coil K2 is connected to the negative electrode of the second battery, and the other end is connected to one end of the capacitor C14; the other end of the capacitor C14 is respectively connected to one end of the adjustable resistor R23, one end of the resistor R29, and one end of the resistor R30; the other end of the adjustable resistor R23 is connected to one end of the resistor R22, and the other end of the resistor R22 is connected to the other end of the pickup coil K1;

[0055] The output end of the operational amplifier IC6 is connected to one end of the resistor R27 and the anode of the diode D3 respectively; the other end of the resistor R27 is connected to the other end of the switch SW2; the cathode of the diode D3 is connected to the anode of the diode D4;

[0056] One end of resistor R7 is connected to the base of transistor VT7; the collector of transistor VT7 is connected to the other end of switch SW2, and the emitter is connected to the other end of resistor R29; the cathode of diode D4 is respectively connected to one end of resistor R28 and the base of transistor VT8; the other end of resistor R28 is connected to the negative electrode of the second battery; the collector of transistor VT8 is connected to the other end of resistor R30, and the emitter is connected to the negative electrode of the second battery.

[0057] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0058] It can simulate the self-test of a real high-voltage tester near a high-voltage live cable under safe voltage, and the effect of the tester triggering an audible and visual alarm during the test; it can turn on and off the signal oscillation sound unit through wireless remote control, and control the generation of sound wave signals of different frequencies, which is convenient for controlling the demonstration process during skill training. It can directly simulate different live states of high-voltage cables through sound wave signals of set frequencies, providing a safer skill training method for electricians; it uses safe voltage without the need for additional power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a schematic diagram of the structural framework of the signal oscillation sound generating unit in the present invention;

[0060] Figure 2 It is a schematic diagram of the structural framework of the simulated electrical testing unit in the present invention;

[0061] Figure 3 This is a schematic diagram of the circuit principle of the wireless remote control switch in the present invention;

[0062] Figure 4 It is a schematic diagram of the circuit principle of the wireless link receiver in the present invention;

[0063] Figure 5 This is a schematic diagram of the circuit principle of the voltage reduction module in the present invention;

[0064] Figure 6 It is a schematic diagram of the circuit principle of the self-test module in the present invention;

[0065] Figure 7 It is a schematic diagram of the circuit principle of the fixed frequency signal generator in the present invention;

[0066] Figure 8 It is a schematic diagram of the circuit principle of the fixed frequency signal sensing module in the present invention. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments thereof. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0068] Example

[0069] like Figures 1 to 8 As shown, in Figures 3 to 8In the embodiment, the negative pole of the battery is equivalent to the ground connection, and the pin numbers of the chips or circuits of various types are also marked with Arabic numerals. The electric test device for skill training of this embodiment includes two parts: a signal oscillation sound generating unit and a simulation electric test unit.

[0070] The signal oscillation sound generating unit is used to generate a sound wave signal of a set frequency; the analog electrical testing unit is used to sense the sound wave signal of the set frequency generated by the signal oscillation sound generating unit and to give an audible and visual alarm.

[0071] like Figure 1 The signal oscillation sound generating unit includes a wireless remote control switch, a wireless receiver, a control relay, a voltage reduction module, a fixed frequency signal generator, and a first battery.

[0072] The wireless remote control switch is connected to the wireless receiver through a radio signal; the first battery is electrically connected to the wireless receiver, the step-down module, and the control relay respectively; the working voltage of the first battery is 12V, and a main power switch is provided at the positive electrode thereof. In the following text, the main power switch is assumed to be in a closed state in this embodiment, and each part is directly connected to the positive electrode of the first battery; the wireless receiver is electrically connected to the control relay; the fixed frequency signal generator is electrically connected to the control relay and the step-down module respectively; the fixed frequency signal generator is used to generate a sound wave signal of a set frequency.

[0073] like Figure 2 The analog electric test unit includes a second battery, a self-test module, a fixed frequency signal sensing module, an optical coupler, a speaker S1, two light emitting diodes, and a resistor R1.

[0074] The second battery is electrically connected to the self-test module, the fixed frequency signal sensing module, the speaker S1, and the light-emitting diode respectively; the working voltage of the second battery is 12V, and a main power switch is provided at the positive electrode thereof. In the present embodiment, it is assumed that the main power switch is in a closed state below, and each part is directly connected to the positive electrode of the second battery; the self-test module is electrically connected to the fixed frequency signal sensing module and the optical coupler respectively; the two light-emitting diodes are LED1 and LED2 respectively; the optical coupler is electrically connected to one end of the resistor R1; the other end of the resistor R1 is respectively connected to one end of the speaker S1, one end of the light-emitting diode LED1, and one end of the light-emitting diode LED1; the other end of the speaker S1, the other end of the light-emitting diode LED1, and the other end of the light-emitting diode LED2 are respectively connected to the negative electrode of the second battery; the speaker S1 is used for sound alarm, and LED1 and LED2 are respectively used for light alarm; the fixed frequency signal sensing module is electrically connected to the optical coupler; the fixed frequency signal sensing module is used to sense the sound wave signal of the set frequency generated by the fixed frequency signal generator.

[0075] like Figure 3The wireless remote control switch includes an antenna P1, an RF112B chip, a capacitor C1, a resistor R2, a resistor R3, a button D0, a button D1, a button D2, a button D3, and a light emitting diode LED3.

[0076] The RF112B chip is used to generate radio signals; the RF112B chip is provided with a GND pin, a PAOUT pin, an LED pin, a P3 pin, a P0 pin, a P1 pin, a P2 pin, and a VDD pin; the GND pin is connected to the negative electrode of an external DC power supply, the PAOUT pin is connected to one end of an antenna P1, the LED pin is connected to one end of a resistor R2, the P3 pin is connected to one end of a key D0, the P2 pin is connected to one end of a key D1, the P1 pin is respectively connected to one end of a key D2 and one end of a key D3, the P0 pin is connected to the other end of a key D3, and the VDD pin is respectively connected to one end of a resistor R3 and one end of a capacitor C1; the antenna P1 is used to transmit radio signals; the other end of the antenna P1 is connected to one end of a capacitor C1; the other end of the capacitor C1 is connected to the GND pin; the other end of the resistor R2 is connected to the anode of a light-emitting diode LED3; the cathode of the light-emitting diode LED3 is connected to the negative electrode of an external DC power supply; one end of the resistor R3 is respectively connected to the other end of a key D0, the other end of a key D1, and the other end of a key D2, and the other end of the resistor R3 is connected to the positive electrode of an external DC power supply.

[0077] like Figure 4 The wireless receiver includes an antenna P2, an RF112B chip, a capacitor C2, a capacitor C3, a reed switch relay KR, a resistor R4, a resistor R5, a resistor R6, and a light emitting diode LED4.

[0078] The RF112B chip is used to generate radio signals; the RF112B chip has a GND pin, a PAOUT pin, an LED pin, and a P3 pin (corresponding to Figure 1 com port of the wireless receiver), P0 pin, P1 pin, P2 pin (P1, P2 pins correspond to Figure 1no port of the wireless receiver), VDD pin; GND pin is connected to the negative electrode of the first battery, PAOUT pin is connected to one end of the antenna P2, LED pin is connected to one end of the resistor R4, P3 pin is connected to one end of the resistor R6, P2 pin and / or P1 pin are connected to the control relay, P0 pin is connected to one end of the reed switch relay KR, and VDD pins are respectively connected to one end of the resistor R6 and one end of the capacitor C2; antenna P2 is used to connect to receive wireless signals; the other end of the antenna P2 is connected to one end of the capacitor C2; the other end of the capacitor C2 is connected to the GND pin; the other end of the resistor R4 is connected to the anode of the light-emitting diode LED4; the cathode of the light-emitting diode LED4 is connected to the negative electrode of the first battery; the other end of the reed switch relay KR is respectively connected to one end of the capacitor C3 and one end of the resistor R5; one end of the capacitor C3 and one end of the resistor R5 are respectively connected to one end of the resistor R6; the other end of the resistor R6 is connected to the positive electrode of the first battery.

[0079] like Figure 5 The step-down module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, resistor R7, resistor R8, adjustable resistor R9, resistor R10, transistor VT1, and diode D1. Figure 5 The +12V in it represents the positive electrode of the first battery, the input ground represents the negative electrode of the first battery, +9V represents that the voltage output by the step-down module after step-down is 9V and is connected to the com port of the control relay, the output ground represents that the negative electrode of the output 9V voltage is connected to the negative electrode of the first battery; the no port of the control relay is connected to the fixed frequency signal generator.

[0080] One end of capacitor C4 is connected to the positive electrode of the first battery, and the other end is connected to the negative electrode of the first battery; one end of capacitor C5 is connected to one end of capacitor C4, and the other end is connected to the other end of capacitor C4; one end of resistor R7 is connected to one end of capacitor C4, and the other end is connected to the base of transistor VT1; the collector of transistor VT1 is connected to one end of resistor R7, and the emitter is connected to one end of resistor R8; the cathode of diode D1 is connected to the base of transistor VT1, and the anode is connected to the other end of capacitor C5; one end of capacitor C6 is connected to the base of transistor VT1, and the other end is connected to one end of resistor R10; the other end of resistor R8 is connected to one end of adjustable resistor R9; the other end of adjustable resistor R9 is connected to one end of resistor R10; the other end of resistor R10 is connected to the other end of capacitor C5; one end of capacitor C7 is connected to one end of resistor R8, and the other end is connected to the other end of resistor R10; one end of capacitor C8 is connected to one end of capacitor C7, and the other end is connected to the other end of capacitor C7; one end of capacitor C8 is connected to the control relay, and the other end is connected to the negative electrode of the first battery.

[0081] like Figure 6The self-test module includes a self-test switch SW1, a diode D2, a speaker S2, a transistor VT2, a transistor VT3, a transistor VT4, a transistor VT5, an operational amplifier IC1, an operational amplifier IC2, an operational amplifier IC3, an operational amplifier IC4, an operational amplifier IC5, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, and a resistor R19.

[0082] One end of the self-test switch SW1 is connected to the positive electrode of the second battery, and the other end is connected to one end of the capacitor C9, and the other end of the capacitor C9 is connected to the negative electrode of the second battery; one end of the resistor R11 is connected to one end of the capacitor C9, and the other end is connected to the other end of the capacitor C9; one end of the resistor R12 is connected to one end of the capacitor C9, and the other end is connected to one end of the resistor R13; the other end of the resistor R13 is connected to the other end of the capacitor C9; one end of the capacitor C10 is connected to one end of the resistor R13, and the other end is connected to the other end of the resistor R13; one end of the resistor R14 is connected to one end of the capacitor C10, and the other end is respectively connected to two input pins of the operational amplifier IC1; the output pin of the operational amplifier IC1 is respectively connected to the two input pins of the operational amplifier IC2; the output pin of the operational amplifier IC2 is respectively connected to one end of the resistor R15, one end of the resistor R16, and one input pin of the operational amplifier IC3; the other input pin of the operational amplifier IC3 is connected to one end of the resistor R17, and the output pin is respectively connected to the two input pins of the operational amplifier IC4; the output pin of the operational amplifier IC4 is connected to one end of the resistor R19; the other end of the resistor R15 is connected to the capacitor C1 0; the other end of the resistor R16 is connected to the base of the transistor VT2; the emitter of the transistor VT2 is connected to the other end of the resistor R15, and the collector of the transistor VT2 is connected to one end of the capacitor C12; the other end of the capacitor C12 is connected to the positive electrode of the power supply; one end of the capacitor C12 is connected to an input pin of the operational amplifier IC5, and the other end is respectively connected to one end of the speaker S2 and another input pin of the operational amplifier IC4; the output pin of the operational amplifier IC5 is connected to the base of the transistor VT3; the collector of the transistor VT3 is connected to the other end of the speaker S2, and the emitter The anode of the diode D2 is connected to the emitter of the transistor VT2; the other end of the resistor R19 is connected to the base of the transistor VT4; the anode of the diode D2 is connected to the other end of the capacitor C12, and the cathode is connected to the collector of the transistor VT4; the collector of the transistor VT4 is connected to the collector of the transistor VT5, and the emitter of the transistor VT4 is connected to the base of the transistor VT5; the emitter of the transistor VT5 is connected to the emitter of the transistor VT3; the anode of the diode D2 is respectively connected to the fixed frequency signal sensing module and the optical coupler, and the emitter of the transistor VT5 is respectively connected to the fixed frequency signal sensing module and the optical coupling module.

[0083] like Figure 7 The fixed frequency signal generator includes a low frequency square wave circuit, an audio generating circuit, a carrier circuit, a modulation circuit, a transistor VT6, a resistor R20, a resistor R21, and a sound wave signal transmitter K3; Figure 7 In the diagram, the +9V mark indicates the connection to the control relay.

[0084] One end of the low-frequency square wave circuit is connected to the control relay, the other end is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to one end of the resistor R20; one end of the resistor R21 is respectively connected to the other end of the resistor R20 and the base of the transistor VT6; the low-frequency square wave circuit is used to generate a square wave electrical signal that controls the operation of the audio generation circuit and the carrier circuit; the collector of the transistor VT6 is connected to the control relay, and the emitter is connected to one end of the audio generation circuit; the other end of the audio generation circuit is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to an input port of the modulation circuit; the audio generation circuit is used to generate a plurality of sound wave signals of specific frequencies The carrier circuit is used to provide a baseband signal for modulating the electrical signal corresponding to the sound wave signals of multiple specific frequencies; the connecting electrical port of the modulation circuit is connected to the other end of the capacitor C8 in the step-down module, and the output port is connected to the sound wave signal transmitter K3; the modulation circuit is used to load the electrical signal generated by the audio generating circuit to the baseband signal generated by the carrier circuit to form a sound wave signal of a set frequency; the sound wave signal transmitter K3 is used to transmit the sound wave signal of the set frequency.

[0085] like Figure 8 The fixed frequency signal sensing module includes a pickup coil K1, a magnetic earphone coil K2, a switch SW2, an operational amplifier IC6, a transistor VT7, a transistor VT8, a diode D3, a diode D4, a capacitor C13, a capacitor C14, a resistor R22, an adjustable resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, and a resistor R30; Figure 8 In the diagram, the +9V battery graphic represents the second battery.

[0086] One end of the switch SW2 is connected to the positive electrode of the second battery, and the other end is connected to one end of the resistor R24; the other end of the resistor R24 ​​is respectively connected to one end of the capacitor C13, one end of the resistor R26, one end of the resistor R25, and one end of the pickup coil K1; the other end of the capacitor C13 is connected to the negative electrode of the second battery, the other end of the resistor R26 is connected to the negative electrode of the second battery, the other end of the resistor R25 is connected to an input pin of the operational amplifier IC6, and the other end of the pickup coil K1 is connected to another input pin of the operational amplifier IC6; one control pin of the operational amplifier IC6 is connected to the negative electrode of the second battery, and the other control pin is connected to the other end of the switch SW2; one end of the magnetic headphone coil K2 is connected to the negative electrode of the second battery, and the other end is connected to one end of the capacitor C14; the other end of the capacitor C14 is respectively connected to one end of the adjustable resistor R23 , one end of resistor R29, one end of resistor R30; the other end of adjustable resistor R23 is connected to one end of resistor R22, and the other end of resistor R22 is connected to the other end of pickup coil K1; the output end of operational amplifier IC6 is respectively connected to one end of resistor R27 and the anode of diode D3; the other end of resistor R27 is connected to the other end of switch SW2; the cathode of diode D3 is connected to the anode of diode D4; one end of resistor R27 is connected to the base of transistor VT7; the collector of transistor VT7 is connected to the other end of switch SW2, and the emitter is connected to the other end of resistor R29; the cathode of diode D4 is respectively connected to one end of resistor R28 and the base of transistor VT8; the other end of resistor R28 is connected to the negative electrode of the second battery; the collector of transistor VT8 is connected to the other end of resistor R30, and the emitter is connected to the negative electrode of the second battery.

[0087] Compared with the prior art, this embodiment has the following beneficial effects:

[0088] It can simulate the self-test of a real high-voltage tester near a high-voltage live cable under safe voltage, and the effect of the tester triggering sound and light warning during the test; it can turn on and off the signal oscillation sound unit through wireless remote control, and control the generation of sound wave signals of different frequencies, which is convenient for controlling the demonstration process during skill training. It can directly simulate different live states of high-voltage cables through sound wave signals of set frequencies, providing electricians with a safer skill training method; it uses safe voltage without the need for additional power supply.

[0089] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An electrical testing device for skill training, It is characterized in that Including signal oscillation sound unit and analog electrical test unit; The signal oscillation sound generating unit is used to generate a sound wave signal of a set frequency; the analog electrical testing unit is used to sense the sound wave signal of the set frequency generated by the signal oscillation sound generating unit and to give an audible and visual alarm; The signal oscillation sound generating unit includes a wireless remote control switch, a wireless connection receiver, a control relay, a voltage reduction module, a fixed frequency signal generator, and a first battery; The wireless remote control switch is connected to the wireless receiver via a radio signal; The wireless remote control switch includes an antenna P1, an RF112B chip, a capacitor C1, a resistor R2, a resistor R3, a button D0, a button D1, a button D2, a button D3, and a light emitting diode LED3; The RF112B chip is used to generate a radio signal; the RF112B chip is provided with a GND pin, a PAOUT pin, an LED pin, a P3 pin, a P0 pin, a P1 pin, a P2 pin, and a VDD pin; the GND pin is connected to the negative electrode of an external DC power supply, the PAOUT pin is connected to one end of the antenna P1, the LED pin is connected to one end of the resistor R2, the P3 pin is connected to one end of the button D0, the P2 pin is connected to one end of the button D1, the P1 pin is respectively connected to one end of the button D2 and one end of the button D3, the P0 pin is connected to the other end of the button D3, and the VDD pin is respectively connected to one end of the resistor R3 and one end of the capacitor C1; The antenna P1 is used for transmitting radio signals; the other end of the antenna P1 is connected to one end of the capacitor C1; The other end of the capacitor C1 is connected to the GND pin; the other end of the resistor R2 is connected to the anode of the light emitting diode LED3; the cathode of the light emitting diode LED3 is connected to the negative electrode of the external DC power supply; One end of the resistor R3 is connected to the other end of the button D0, the other end of the button D1, and the other end of the button D2, and the other end of the resistor R3 is connected to the positive electrode of the external DC power supply; The wireless link receiver includes antenna P2, RF112B chip, capacitor C2, capacitor C3, reed switch relay KR, resistor R4, resistor R5, resistor R6, and light emitting diode LED4; The RF112B chip is used to generate a radio signal; the RF112B chip is provided with a GND pin, a PAOUT pin, an LED pin, a P3 pin, a P0 pin, a P1 pin, a P2 pin, and a VDD pin; the GND pin is connected to the negative electrode of the first battery, the PAOUT pin is connected to one end of the antenna P2, the LED pin is connected to one end of the resistor R4, the P3 pin is connected to one end of the resistor R6, the P2 pin and / or the P1 pin are connected to a control relay, the P0 pin is connected to one end of the reed switch relay KR, and the VDD pin is respectively connected to one end of the resistor R6 and one end of the capacitor C2; Antenna P2 is used to connect and receive radio signals; the other end of antenna P2 is connected to one end of capacitor C2; The other end of the capacitor C2 is connected to the GND pin; the other end of the resistor R4 is connected to the anode of the light emitting diode LED4; the cathode of the light emitting diode LED4 is connected to the negative electrode of the first battery; The other end of the reed switch relay KR is connected to one end of the capacitor C3 and one end of the resistor R5 respectively; one end of the capacitor C3 and one end of the resistor R5 are connected to one end of the resistor R6 respectively; The other end of the resistor R6 is connected to the positive electrode of the first battery; The first battery is electrically connected to the wireless receiver, the voltage reduction module, and the control relay respectively; The step-down module includes capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, resistor R7, resistor R8, adjustable resistor R9, resistor R10, transistor VT1, and diode D1; One end of the capacitor C4 is connected to the positive electrode of the first battery, and the other end is connected to the negative electrode of the first battery; one end of the capacitor C5 is connected to one end of the capacitor C4, and the other end is connected to the other end of the capacitor C4; One end of the resistor R7 is connected to one end of the capacitor C4, and the other end is connected to the base of the transistor VT1; the collector of the transistor VT1 is connected to one end of the resistor R7, and the emitter is connected to one end of the resistor R8; the cathode of the diode D1 is connected to the base of the transistor VT1, and the anode is connected to the other end of the capacitor C5; one end of the capacitor C6 is connected to the base of the transistor VT1, and the other end is connected to one end of the resistor R10; the other end of the resistor R8 is connected to one end of the adjustable resistor R9; the other end of the adjustable resistor R9 is connected to one end of the resistor R10; the other end of the resistor R10 is connected to the other end of the capacitor C5; One end of the capacitor C7 is connected to one end of the resistor R8, and the other end is connected to the other end of the resistor R10; One end of the capacitor C8 is connected to one end of the capacitor C7, and the other end is connected to the other end of the capacitor C7; one end of the capacitor C8 is connected to the control relay, and the other end is connected to the negative electrode of the first battery; The wireless receiver is electrically connected to the control relay; The fixed frequency signal generator is electrically connected to the control relay and the step-down module respectively; The fixed frequency signal generator is used to generate a sound wave signal of a set frequency; The analog electric test unit includes a second battery, a self-test module, a fixed frequency signal sensing module, an optical coupler, a speaker S1, two light emitting diodes, and a resistor R1; The second battery is electrically connected to the self-test module, the fixed frequency signal sensing module, the speaker S1, and the light emitting diode respectively; The self-test module is electrically connected to the fixed frequency signal sensing module and the optical coupler respectively; The self-test module includes a self-test switch SW1, a diode D2, a speaker S2, a transistor VT2, a transistor VT3, a transistor VT4, a transistor VT5, an operational amplifier IC1, an operational amplifier IC2, an operational amplifier IC3, an operational amplifier IC4, an operational amplifier IC5, a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a resistor R18, and a resistor R19; One end of the self-test switch SW1 is connected to the positive electrode of the second battery, and the other end is connected to one end of the capacitor C9, and the other end of the capacitor C9 is connected to the negative electrode of the second battery; One end of the resistor R11 is connected to one end of the capacitor C9, and the other end is connected to the other end of the capacitor C9; one end of the resistor R12 is connected to one end of the capacitor C9, and the other end is connected to one end of the resistor R13; the other end of the resistor R13 is connected to the other end of the capacitor C9; one end of the capacitor C10 is connected to one end of the resistor R13, and the other end is connected to the other end of the resistor R13; One end of the resistor R14 is connected to one end of the capacitor C10, and the other end is respectively connected to the two input pins of the operational amplifier IC1; the output pin of the operational amplifier IC1 is respectively connected to the two input pins of the operational amplifier IC2; the output pin of the operational amplifier IC2 is respectively connected to one end of the resistor R15, one end of the resistor R16, and one input pin of the operational amplifier IC3; the other input pin of the operational amplifier IC3 is connected to one end of the resistor R17, and the output pin is respectively connected to the two input pins of the operational amplifier IC4; the output pin of the operational amplifier IC4 is connected to one end of the resistor R19; The other end of the resistor R15 is connected to the other end of the capacitor C10; the other end of the resistor R16 is connected to the base of the transistor VT2; the emitter of the transistor VT2 is connected to the other end of the resistor R15, and the collector of the transistor VT2 is connected to one end of the capacitor C12; the other end of the capacitor C12 is connected to the positive electrode of the power supply; One end of the capacitor C12 is connected to an input pin of the operational amplifier IC5, and the other end is respectively connected to one end of the speaker S2 and another input pin of the operational amplifier IC4; the output pin of the operational amplifier IC5 is connected to the base of the transistor VT3; The collector of transistor VT3 is connected to the other end of speaker S2, and the emitter is connected to the emitter of transistor VT2; The other end of the resistor R19 is connected to the base of the transistor VT4; the anode of the diode D2 is connected to the other end of the capacitor C12, and the cathode is connected to the collector of the transistor VT4; the collector of the transistor VT4 is connected to the collector of the transistor VT5, and the emitter of the transistor VT4 is connected to the base of the transistor VT5; the emitter of the transistor VT5 is connected to the emitter of the transistor VT3; The anode of the diode D2 is connected to the fixed frequency signal sensing module and the optical coupler respectively, and the emitter of the transistor VT5 is connected to the fixed frequency signal sensing module and the optical coupling module respectively; The two light emitting diodes are LED1 and LED2 respectively; The optical coupler is electrically connected to one end of the resistor R1; The other end of the resistor R1 is respectively connected to one end of the speaker S1, one end of the light emitting diode LED1, and one end of the light emitting diode LED2; the other end of the speaker S1, the other end of the light emitting diode LED1, and the other end of the light emitting diode LED2 are respectively connected to the negative electrode of the second battery; Speaker S1 is used for sound warning, LED1 and LED2 are used for light warning respectively; The fixed frequency signal sensing module is electrically connected to the optical coupler; the fixed frequency signal sensing module is used to sense the sound wave signal of the set frequency generated by the fixed frequency signal generator.

2. The electrical testing device for skill training according to claim 1, It is characterized in that The fixed frequency signal generator includes a low frequency square wave circuit, an audio generating circuit, a carrier circuit, a modulation circuit, a transistor VT6, a resistor R20, a resistor R21, and a sound wave signal transmitter K3; One end of the low-frequency square wave circuit is connected to the control relay, the other end is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to one end of the resistor R20; one end of the resistor R21 is respectively connected to the other end of the resistor R20 and the base of the transistor VT6; the low-frequency square wave circuit is used to generate a square wave electrical signal to control the operation of the audio generating circuit and the carrier circuit; the collector of the transistor VT6 is connected to the control relay, and the emitter is connected to one end of the audio generating circuit; The other end of the audio generating circuit is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to an input port of the modulation circuit; the audio generating circuit is used to generate electrical signals corresponding to multiple sound wave signals of specific frequencies; One end of the carrier circuit is connected to the emitter of the transistor VT6, the other end is connected to the other end of the capacitor C8 in the step-down module, and the other end is connected to another input port of the modulation circuit; the carrier circuit is used to provide a baseband signal for modulating the electrical signal corresponding to the acoustic wave signals of the multiple specific frequencies; The connection electrical port of the modulation circuit is connected to the other end of the capacitor C8 in the step-down module, and the output port is connected to the sound wave signal transmitter K3; the modulation circuit is used to load the electrical signal generated by the audio generating circuit to the baseband signal generated by the carrier circuit to form a sound wave signal of a set frequency; the sound wave signal transmitter K3 is used to transmit the sound wave signal of the set frequency.

3. The electrical testing device for skill training according to claim 2, It is characterized in that The fixed frequency signal sensing module includes a pickup coil K1, a magnetic earphone coil K2, a switch SW2, an operational amplifier IC6, a transistor VT7, a transistor VT8, a diode D3, a diode D4, a capacitor C13, a capacitor C14, a resistor R22, an adjustable resistor R23, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, and a resistor R30; One end of the switch SW2 is connected to the positive electrode of the second battery, and the other end is connected to one end of the resistor R24; the other end of the resistor R24 ​​is respectively connected to one end of the capacitor C13, one end of the resistor R26, one end of the resistor R25, and one end of the pickup coil K1; the other end of the capacitor C13 is connected to the negative electrode of the second battery, the other end of the resistor R26 is connected to the negative electrode of the second battery, the other end of the resistor R25 is connected to an input pin of the operational amplifier IC6, and the other end of the pickup coil K1 is connected to another input pin of the operational amplifier IC6; one control pin of the operational amplifier IC6 is connected to the negative electrode of the second battery, and the other control pin is connected to the other end of the switch SW2; One end of the magnetic earphone coil K2 is connected to the negative electrode of the second battery, and the other end is connected to one end of the capacitor C14; the other end of the capacitor C14 is respectively connected to one end of the adjustable resistor R23, one end of the resistor R29, and one end of the resistor R30; the other end of the adjustable resistor R23 is connected to one end of the resistor R22, and the other end of the resistor R22 is connected to the other end of the pickup coil K1; The output end of the operational amplifier IC6 is connected to one end of the resistor R27 and the anode of the diode D3 respectively; the other end of the resistor R27 is connected to the other end of the switch SW2; the cathode of the diode D3 is connected to the anode of the diode D4; One end of the resistor R27 is connected to the base of the transistor VT7; the collector of the transistor VT7 is connected to the other end of the switch SW2, and the emitter is connected to the other end of the resistor R29; the cathode of the diode D4 is respectively connected to one end of the resistor R28 and the base of the transistor VT8; the other end of the resistor R28 is connected to the negative electrode of the second battery; the collector of the transistor VT8 is connected to the other end of the resistor R30, and the emitter is connected to the negative electrode of the second battery.

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