A detection platform for explosion-proof electric control systems for mines

Abstract

The present invention relates to a detection platform for a mine explosion-proof electric control system, comprising a host computer and a detection control device, wherein the detection control device comprises a main control chip, a signal output module and a drive input and communication detection module; the input end of the signal output module is connected to the signal output end of the main control chip, the output end of the drive input and communication detection module is connected to the signal input end of the main control chip, the output end of the signal output module is used to connect the signal input end of the mine explosion-proof electric control system to be detected, and the input end of the drive input and communication detection module is used to connect the drive output and communication end of the mine explosion-proof electric control system to be detected; the host computer is connected to the main control chip and the mine explosion-proof electric control system in a two-way communication manner through a CAN bus. The present invention can fully and automatically detect the signal input, drive output and communication channels of different mine explosion-proof electric control systems, reduce manual participation, and improve production efficiency.

Description

Technical Field

[0001] The invention relates to the field of detection of explosion-proof electric control systems for mines, and in particular to a detection platform for explosion-proof electric control systems for mines. Background Art

[0002] The explosion-proof electronic control system for mines may include: electronic control devices for fuel injection of explosion-proof diesel engines for mines, collectors for electronic control devices for explosion-proof diesel locomotives for mines, controllers for electronic control devices for explosion-proof diesel locomotives, automatic protection devices for mine diesel engines, and other devices with signal (resistance, voltage, current, switch, frequency, etc.) input, drive (high side, low side, relay, H bridge, etc.) output, and communication (CAN, RS485, RS232, etc.). With the development of science and technology, explosion-proof diesel engines for mines have officially entered the era of electronic control, which has also brought great challenges to the production of explosion-proof electronic control systems for mines. Due to the particularity of the coal industry, in accordance with the requirements of national safety standards, there are many product testing sub-items, complicated operations, and complex processes. At present, the electronic control test system used in the electronic control workshop is a semi-automatic equipment, but it still requires operators to perform corresponding auxiliary operations, such as manually changing the input electrical parameters, using an oscilloscope to detect the knocking cylinder sequence, and inserting cables one by one, which is time-consuming and complicated; component inspection is basically in the manual stage, relying on operators to perform manual testing and recording, and cannot form mass production, affecting production efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a detection platform for mining explosion-proof electric control systems, which can fully and automatically detect the signal input, drive output and communication channels of different mining explosion-proof electric control systems, reduce manual participation and improve production efficiency.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: a detection platform for a mine explosion-proof electric control system,

[0005] It comprises a host computer and a detection control device, wherein the detection control device comprises a control chip, a signal output module and a drive input and communication detection module; the input end of the signal output module is connected to the signal output end of the control chip, the output end of the drive input and communication detection module is connected to the signal input end of the control chip, the output end of the signal output module is used to connect to the signal input end of the mining explosion-proof electric control system to be detected, and the input end of the drive input and communication detection module is used to connect to the drive output and communication end of the mining explosion-proof electric control system to be detected; the host computer is connected to the control chip and the mining explosion-proof electric control system in two-way communication through a CAN bus;

[0006] The host computer is used to send sensor setting data to the control chip; the control chip is used to control the signal output module to generate a sensor detection signal according to the sensor setting data; the signal output module is used to transmit the sensor detection signal to the mining explosion-proof electric control system; the mining explosion-proof electric control system is used to respond to the sensor detection signal, output sensor response data, and transmit the sensor response data to the host computer; the host computer is used to compare the sensor setting data with the sensor response data, and judge whether the signal input channel of the mining explosion-proof electric control system is qualified through the comparison result;

[0007] The host computer is used to send drive and communication setting data to the mining explosion-proof electric control system; the mining explosion-proof electric control system is used to respond to the drive and communication setting data, and generate drive and communication response signals, and transmit the drive and communication response signals to the drive input and communication detection module; the drive input and communication detection module is used to detect the drive and communication response signals, obtain drive and communication detection signals, and transmit the drive and communication detection signals to the control chip; the control chip is used to transmit the drive and communication detection signals to the host computer in the form of data; the host computer is used to compare the drive and communication setting data with the drive and communication detection signals in data form, and judge whether the drive output and communication channel of the mining explosion-proof electric control system are qualified through the comparison results.

[0008] The beneficial effects of the present invention are as follows: in a detection platform of a mining explosion-proof electric control system of the present invention, the host computer sends sensor setting data to the detection control device through the CAN bus, and the main control chip controls the signal output module to generate a sensor detection signal (one or more of frequency, resistance, voltage, current and switch). The sensor detection signal is connected to the product to be tested through a wiring harness, and the product to be tested will respond to the sensor detection signal and then output sensor response data. The host computer then reads the sensor response data of the signal input channel of the product to be tested through the CAN bus and compares it with the sensor setting data. If it is within the qualified range, the detection result of this signal input channel is judged to be qualified. ; In addition, the host computer can also send drive and communication setting data to the product to be tested through the CAN bus, and the product to be tested will respond to the drive and communication setting data and then output drive and communication response signals (power supply, relay, high and low side switch, H bridge drive, solenoid valve drive and CAN communication), this drive and communication response signal is connected to the detection control device through a wiring harness, and the drive input and communication detection module detects the drive and communication response signal to obtain a drive and communication detection signal, and the host computer reads the drive and communication detection signal in the form of data through the CAN bus again, and compares it with the drive and communication setting data, if it is within the qualified range, then this channel detection result is determined to be qualified. Therefore, the present invention can fully and automatically detect the signal input, drive output and communication channel of different mining explosion-proof electric control systems, reduce manual participation, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is an overall structural block diagram of a detection platform for a mining explosion-proof electric control system of the present invention;

[0010] Figure 2 The overall structural block diagram of the detection control device is shown in FIG.

[0011] Figure 3 It is a circuit structure schematic diagram of a frequency signal output circuit;

[0012] Figure 4 is a circuit structure diagram of a resistance signal output circuit;

[0013] Figure 5 is a circuit structure schematic diagram of a voltage signal output circuit;

[0014] Figure 6 is a circuit structure schematic diagram of a current signal output circuit;

[0015] Figure 7 is a circuit structure diagram of a switch signal output circuit;

[0016] Figure 8 is a circuit structure diagram of a power input circuit;

[0017] Fig. 9 This is a schematic diagram of the circuit structure of the relay input circuit. DETAILED DESCRIPTION

[0018] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0019] like Figure 1 As shown in the figure, a detection platform for explosion-proof electric control system for mines,

[0020] It includes a host computer and a detection control device, wherein the detection control device includes a control chip, a signal output module and a drive input and communication detection module; the input end of the signal output module is connected to the signal output end of the control chip, the output end of the drive input and communication detection module is connected to the signal input end of the control chip, the output end of the signal output module is used to connect the signal input end of the mining explosion-proof electric control system to be detected, and the input end of the drive input and communication detection module is used to connect the drive output and communication end of the mining explosion-proof electric control system to be detected; the host computer is bidirectionally connected to the control chip and the mining explosion-proof electric control system through a CAN bus (specifically, the host computer is not directly connected to the control chip through the CAN bus, and the host computer and the control chip are also connected with a level conversion isolation circuit);

[0021] The host computer is used to send sensor setting data to the control chip; the control chip is used to control the signal output module to generate a sensor detection signal according to the sensor setting data; the signal output module is used to transmit the sensor detection signal to the mining explosion-proof electric control system; the mining explosion-proof electric control system is used to respond to the sensor detection signal, output sensor response data, and transmit the sensor response data to the host computer; the host computer is used to compare the sensor setting data with the sensor response data, and judge whether the signal input channel of the mining explosion-proof electric control system is qualified through the comparison result;

[0022] The host computer is used to send drive and communication setting data to the mining explosion-proof electric control system; the mining explosion-proof electric control system is used to respond to the drive and communication setting data, and generate drive and communication response signals, and transmit the drive and communication response signals to the drive input and communication detection module; the drive input and communication detection module is used to detect the drive and communication response signals, obtain drive and communication detection signals, and transmit the drive and communication detection signals to the control chip; the control chip is used to transmit the drive and communication detection signals to the host computer in the form of data; the host computer is used to compare the drive and communication setting data with the drive and communication detection signals in data form, and judge whether the drive output and communication channel of the mining explosion-proof electric control system are qualified through the comparison results.

[0023] In the present invention, the host computer provides a human-computer interaction function. The host computer software is data-driven, and can test different types of products according to different projects, so as to achieve the purpose of universal testing, and the test of all functions can be completed with one click, without manual intervention in the middle; during the test process, single-step test and module test functions are provided, which can be flexibly used for troubleshooting; the host computer is equipped with a server, which saves all data to the database, which can be used for quality traceability; the drive current waveform and related data can be viewed through the host computer, which can be used to determine the drive current test parameters and troubleshooting; the host computer can read and write the relevant data of the product to be tested. The host computer has the auxiliary functions of knock cylinder test and data filling, the knock cylinder test is used for aging, and the data filling is used to fill the control program and MAP data into the electronic control system.

[0024] like Figure 2 As shown, the signal output module includes any one of a frequency signal output circuit, a resistance signal output circuit, a voltage signal output circuit, a current signal output circuit and a switch signal output circuit, or a combination of multiple circuits; the drive input and communication detection module includes any one of a power input circuit, a relay input circuit, a high-side and low-side switch input circuit, an H-bridge drive input circuit, a solenoid valve drive input circuit and a communication circuit, or a combination of multiple circuits; the control chip includes a main control chip and a relay drive chip, and the main control chip and the relay drive chip are both connected to the host computer through a CAN bus for bidirectional communication, and the main control chip is also connected to the relay drive chip.

[0025] In this specific embodiment, Figure 3As shown: the frequency signal output circuit includes a relay LS1, one end of the coil of the relay LS1 is connected to the relay power signal, and the other end of the coil of the relay LS1 is connected to the output end of the relay drive chip; the common end of the relay LS1 is connected to the output end of the main control chip through a first circuit, the normally open end of the relay LS1 is connected to the frequency signal input end of the mining explosion-proof electric control system to be detected, and the normally closed end of the relay LS1 is connected to the frequency acquisition channel of the main control chip through a second circuit;

[0026] The first circuit includes a transistor Q1, a resistor R1 and a resistor R2; the collector of the transistor Q1 is connected to the common end of the relay LS1, the emitter of the transistor Q1 and one end of the resistor R1 are connected to the intrinsically safe power supply ground, the collector of the transistor Q1 is connected to one end of the resistor R2, and the other end of the resistor R1 is connected to the other end of the resistor R2 and then connected to the output end of the main control chip;

[0027] The second circuit includes a Schmitt-triggered inverter U1, a resistor R3, a resistor R4 and a capacitor C1; an input pin of the Schmitt-triggered inverter U1 is connected to the normally closed end of the relay LS1, and the input pin of the Schmitt-triggered inverter U1 is also connected to the intrinsically safe power supply ground through the resistor R3 and the capacitor C1 respectively, the power supply pin of the Schmitt-triggered inverter U1 and one end of the resistor R4 are both connected to a 5V intrinsically safe power supply, the other end of the resistor R4 is connected to the input pin of the Schmitt-triggered inverter U1, the ground pin of the Schmitt-triggered inverter U1 is connected to the intrinsically safe power supply ground, and the output pin of the Schmitt-triggered inverter U1 is connected to the frequency acquisition channel of the main control chip.

[0028] Among them, relay LS1 is a relay of model AGQ20012, which is an eight-pin relay with two open and two closed pins. The two common ends of relay LS1 are respectively connected to the output end of the main control chip through two first circuits, and the two normally closed ends of relay LS1 are respectively connected to the frequency acquisition channel of the main control chip through two second circuits.

[0029] exist Figure 3 In the figure, I_S_FRE.1 and I_S_FRE.2 are the signals output from the output end of the main control chip, I_S_RELAY.1 is the signal output from the output end of the relay driver chip, O_S_FRE_E.1 and O_S_FRE_E.2 are the frequency signals output by the frequency signal output circuit (connected to the mining explosion-proof electric control system to be tested), and O_S_FRE_M.1 and O_S_FRE_M.2 are the frequency signal acquisition signals of the frequency signal output circuit (connected to the frequency acquisition channel of the main control chip).

[0030] Test example:

[0031] a) The host computer instructs the output signal to the relay driver chip, and the relay driver chip outputs a low level (I_S_RELAY.1 is a low level). At this time, the common terminal (COM) of relay LS1 is connected to the normally open terminal (NO);

[0032] b) According to the host computer instruction, the control chip output frequency signal is connected to I_S_FRE.1, I_S_FRE.1 controls the base of transistor Q1, and the collector output signal of transistor Q1 is connected to O_S_FRE_E.1, and O_S_FRE_E.1 is connected to the mine explosion-proof electric control system to be tested through a wiring harness. The frequency signal processing circuit in the mine explosion-proof electric control system to be tested is equipped with a pull-up resistor. At this time, the frequency signal output circuit outputs the frequency signal, which is the input frequency signal of the mine explosion-proof electric control system to be tested. If the input signal frequency of the mine explosion-proof electric control system to be tested is consistent with the output signal frequency of the frequency signal output circuit, it can be determined that the frequency signal acquisition function of the mine explosion-proof electric control system to be tested is qualified.

[0033] Self-test example:

[0034] a) The host computer instructs the output signal to the relay driver chip, and the relay driver chip outputs a high level (I_S_RELAY.1 is a high level). At this time, the common terminal (COM) of relay LS1 is connected to the normally closed terminal (NC);

[0035] b) According to the host computer instruction, the main control chip output frequency signal is controlled to be connected to I_S_FRE.1, I_S_FRE.1 controls the base of transistor Q1, the collector output signal of transistor Q1 is connected to the input pin of Schmitt trigger inverter U1, and the output pin output signal of Schmitt trigger inverter U1 is connected to the frequency acquisition channel of the main control chip; at this time, if the frequency signal output circuit output frequency signal is the same as the detected frequency signal, it can be determined that the frequency signal output circuit self-test is qualified.

[0036] Specific:

[0037] The frequency signal output circuit is designed to output 4 channels, which can be set to ordinary PWM output, fixed frequency rectangular wave output, special PWM waveform output (multi-tooth or missing tooth waveform).

[0038] The output waveform amplitude of the frequency signal output circuit can be set by the host computer, and is adjustable to 5V / 12V / 24V.

[0039] The frequency signal output circuit has a self-diagnosis function. By controlling the relay LS1 to switch to the self-loop state through the host computer, it can perform self-check on its own frequency output channel.

[0040] The frequency signal output circuit outputs the frequency input detection data according to the frequency input setting data of the host computer, switches through relay LS1, and reads it back to the main control chip to complete the self-test function.

[0041] The frequency signal output circuit outputs the frequency input detection data according to the frequency input setting data of the host computer, switches to the output state through the relay LS1, and the wiring harness is connected to the mining explosion-proof electric control system to be tested. The host computer reads the frequency input response data of the mining explosion-proof electric control system, and compares the frequency input response data with the frequency input setting data to determine whether the frequency output channel of the mining explosion-proof electric control system is qualified.

[0042] In this specific embodiment, Figure 4 As shown: the resistance signal output circuit includes a digital potentiometer U2, a relay LS2, a relay LS3, a relay LS4 and a relay LS5; the signal input pin of the digital potentiometer U2 is connected to the output end of the main control chip, the resistance output pin of the digital potentiometer U2 is respectively connected to the normally closed end of the relay LS2, the normally open end of the relay LS3, the normally open end of the relay LS4 and the normally open end of the relay LS5, the common end of the relay LS2 is connected to the voltage signal input end of the main control chip through a third circuit, the common end of the relay LS3 is connected to the voltage signal input end of the main control chip The common end, the common end of the relay LS4 and the common end of the relay LS5 are all connected to the resistance signal input end of the mining explosion-proof electric control system to be detected; one end of the coil of the relay LS2, one end of the coil of the relay LS3, one end of the coil of the relay LS4 and one end of the coil of the relay LS5 are all connected to the relay power supply signal; the other end of the coil of the relay LS2, the other end of the coil of the relay LS3, the other end of the coil of the relay LS4 and the other end of the coil of the relay LS5 are all connected to the output end of the relay drive chip;

[0043] The third circuit includes resistors R5, R6, R7, a diode D1 and a capacitor C2; one end of the resistor R5, one end of the resistor R6 and one end of the resistor R7 are all connected to the common end of the relay LS2, the other end of the resistor R5 and the negative electrode of the diode D1 are both connected to a 5V power supply signal, the other end of the resistor R6 is connected to the positive electrode of the diode D1, the other end of the resistor R7 is connected to the middle end of the diode D1, one end of the capacitor C2 is connected to the positive electrode of the diode D1, the other end of the capacitor C2 is connected to the middle end of the diode D1, and the middle end of the diode D1 is also connected to the voltage signal input end of the main control chip.

[0044] Among them, relay LS2, relay LS3, relay LS4 and relay LS5 are all AGQ20012 model relays, which are two-open and two-closed eight-pin relays. The two common ends of relay LS2 are respectively connected to the voltage signal input end of the main control chip through two third circuits.

[0045] exist Figure 4 Among them, I_S_CS4231.1, I_S_SCK4231, I_S_SDI.4231, I_S_SHDN.4231, and I_S_RELAY.1~8 are the signals output from the output end of the main control chip, and O_S_SDO.4231 is the feedback signal input from the digital potentiometer U2 to the main control chip; U is the relay driver chip, and the relay driver chip outputs O_S_RELAY.4, 6~8 to control relays LS2~5. O_A_RES.M1 and O_A_RES.M2 are connected to the main control chip (used during self-test), and O_A_RES.E1~6 are the output signals of the resistance signal output circuit, which are connected to the mining explosion-proof electric control system to be tested (used during testing).

[0046] Test example:

[0047] a) After receiving the command from the host computer, the main control chip outputs a signal to control the digital potentiometer U2, and the digital potentiometer U2 outputs 2 resistance values;

[0048] b) The main control chip outputs a signal to control the relay driver chip U. The relay driver chip U outputs a relay control signal O_S_RELAY8 at a low level. At this time, the normally open end of the relay LS3 is connected to the common end, and the output signal O_A_RES.E1 is the resistance value output by the digital potentiometer U2;

[0049] The resistance value output by the digital potentiometer U2 is connected to the mining explosion-proof electric control system to be tested through the wiring harness;

[0050] d) If the resistance value calculated by the mining explosion-proof electric control system to be tested is consistent with the resistance value set by the main control chip, it is judged to be qualified.

[0051] Self-test example:

[0052] e) After receiving the command from the host computer, the main control chip outputs a signal to control the digital potentiometer U2, and the digital potentiometer U2 outputs 2 resistance values;

[0053] f) The main control chip outputs a signal to control the relay driver chip U. The relay driver chip U outputs a relay control signal O_S_RELAY4 at a low level. At this time, the normally open end of the relay LS2 is connected to the common end. The resistance value output by the digital potentiometer U2 is divided by the resistors R5 and R6 to obtain a voltage value O_A_RES.M1;

[0054] g) The voltage value O_A_RES.M1 is connected to the voltage signal input terminal of the main control chip;

[0055] h) If the resistance value calculated by the mining explosion-proof electric control system to be tested is consistent with the resistance value output by the mining explosion-proof electric control system to be tested, it is judged to be qualified.

[0056] Specific:

[0057] The resistance signal output circuit is designed to output 6 channels, the output resistance (10~50K)Ω is continuously adjustable, and the resolution is 10Ω.

[0058] The resistance signal output circuit has a self-diagnosis function. By controlling the relay LS2 to switch to the self-loop state through the host computer, the resistance output channel can be self-checked.

[0059] The resistance signal output circuit outputs the resistance input detection data according to the resistance input setting data of the host computer, switches through relay LS2, and reads it back to the main control chip to complete the self-test function.

[0060] The resistance signal output circuit outputs the resistance input detection data according to the resistance input setting data of the host computer, switches to the output state through the relay LS2, and the wiring harness is connected to the mining explosion-proof electric control system to be tested. The host computer reads the resistance input response data of the mining explosion-proof electric control system, and compares the resistance input response data with the resistance input setting data to determine whether the resistance output channel of the mining explosion-proof electric control system is qualified.

[0061] In this specific embodiment, Figure 5 As shown: the voltage signal output circuit includes a digital-to-analog conversion chip U3, a relay LS6, a relay LS7, a relay LS8, a relay LS9 and a relay LS10; the signal input pin of the digital-to-analog conversion chip U3 is connected to the output end of the main control chip, the VSS pin of the digital-to-analog conversion chip U3 is connected to the signal analog ground, a resistor R200 is connected between the VSS pin of the digital-to-analog conversion chip U3 and the output pin VOUTB of the digital-to-analog conversion chip U3, and the The pins are connected to the signal analog ground through the resistor R300, and the output pin VOUTA and the output pin VOUTB of the digital-to-analog conversion chip U3 are respectively connected to the normally closed end of the relay LS6, the normally open end of the relay LS7, the normally open end of the relay LS8, the normally open end of the relay LS9 and the normally open end of the relay LS10 through the inductor L1 and the inductor L2, and the common end of the relay LS6 is connected to the voltage signal input end of the main control chip through the fourth circuit, and the common end of the relay LS7, the common end of the relay LS8, the common end of the relay LS9 and the common end of the relay LS10 are connected to the voltage signal input end of the main control chip through the fourth circuit. The common end of the relay LS10 is connected to the voltage signal input end of the mining explosion-proof electric control system to be detected; one end of the coil of the relay LS6, one end of the coil of the relay LS7, one end of the coil of the relay LS8, one end of the coil of the relay LS9 and one end of the coil of the relay LS10 are all connected to the relay power supply signal, and the other end of the coil of the relay LS6, the other end of the coil of the relay LS7, the other end of the coil of the relay LS8, the other end of the coil of the relay LS9 and the other end of the coil of the relay LS10 are connected to the output end of the relay drive chip;

[0062] The fourth circuit includes a resistor R8, a resistor R9 and a capacitor C3; one end of the resistor R8 and one end of the resistor R9 are both connected to the common end of the relay LS6, the other end of the resistor R8 and the other end of the resistor R9 are respectively connected to the two ends of the capacitor C3, the end of the capacitor C3 connected to the resistor R8 is connected to the voltage signal input end of the main control chip, and the end of the capacitor C3 connected to the resistor R9 is also connected to the intrinsically safe power supply ground.

[0063] exist Figure 5 Among them, I_S_CS4812, I_S_SCK4812, I_S_SDL4812, I_S_RELAY.1~8 are the output signals of the main control chip, I_V_AGND is the signal analog ground, U is the relay driver chip, and the relay driver chip U outputs O_S_RELAY.4~8 to control relays LS6~10. O_A_VOL.M1 is connected to the main control chip (used during self-test), O_A_VOL.E1~8 is the output signal of the voltage signal output circuit, and is connected to the mining explosion-proof electric control system to be tested (used during testing).

[0064] The testing and self-checking principles of the voltage signal output circuit are the same as those of the resistance signal output circuit.

[0065] Specific:

[0066] The voltage signal output circuit has 8 output channels, and the output voltage (0~5)V is continuously adjustable with a resolution of 0.02V.

[0067] The voltage signal output circuit has a self-diagnosis function. By controlling the relay LS6 to switch to the self-loop state through the host computer, it can perform self-check on its own voltage output channel.

[0068] The voltage signal output circuit outputs the voltage input detection data according to the voltage input setting data of the host computer, switches through relay LS6, and reads it back to the main control chip to complete the self-test function.

[0069] The voltage signal output circuit outputs voltage input detection data according to the voltage input setting data of the host computer, switches to the output state through relay LS6, and the wiring harness is connected to the mining explosion-proof electric control system to be tested. The host computer reads the voltage input response data of the mining explosion-proof electric control system, and compares the voltage input response data with the voltage input setting data to determine whether the voltage output channel of the mining explosion-proof electric control system is qualified.

[0070] In this specific embodiment, Figure 6 As shown: the current signal output circuit includes a digital-to-analog conversion chip U4, a current conversion circuit and a relay LS11; the signal input end of the digital-to-analog conversion chip U4 is connected to the output end of the main control chip, the output end of the digital-to-analog conversion chip U4 is connected to the input end of the current conversion circuit, the output end of the current conversion circuit is connected to the common end of the relay LS11, the normally closed end of the relay LS11 is connected to the current signal input end of the main control chip through the fifth circuit, the normally open end of the relay LS11 is connected to the current signal input end of the mining explosion-proof electric control system to be detected, one end of the coil of the relay LS11 is connected to the relay power supply signal, and the other end of the coil of the relay LS11 is connected to the relay digital signal;

[0071] The fifth circuit includes a resistor R10, a resistor R11 and a capacitor C4, one end of the resistor R10 and one end of the resistor R11 are both connected to the normally closed end of the relay LS11, the other end of the resistor R10 is grounded, the other end of the resistor R11 is grounded through the capacitor C4, and the other end of the resistor R11 is connected to the current signal input end of the main control chip;

[0072] The current conversion circuit includes a voltage-current conversion chip U8, a transistor Q100 and a MOS tube 200; the GND1 pin, the OD pin and the GND2 pin of the voltage-current conversion chip U8 are connected to the intrinsically safe power supply ground, the SET pin of the voltage-current conversion chip U8 is connected to the intrinsically safe power supply ground through a resistor R400, the VIN pin of the voltage-current conversion chip U8 is connected to the output end of the digital-to-analog conversion chip U4 through a resistor R500, the REGF pin of the voltage-current conversion chip U8 is connected to the intrinsically safe power supply ground through a capacitor C100, the REGF pin of the voltage-current conversion chip U8 is also connected to the intrinsically safe power supply ground through a series resistor R600 and a resistor R700, the REGS pin of the voltage-current conversion chip U8 is connected to the resistor R600 and the The VG pin of the voltage-current conversion chip U8 is connected to the collector of the transistor Q100 and the gate of the MOS tube 200 respectively, the IS pin of the voltage-current conversion chip U8 is connected to the emitter of the transistor Q100, the VSP pin of the voltage-current conversion chip U8 is connected to the drain of the MOS tube 200 through a diode D100, the emitter of the transistor Q100 is connected to the source of the MOS tube 200 through a resistor R800, the base of the transistor Q100 is connected to the source of the MOS tube 200, the drain of the MOS tube 200 is connected to the intrinsically safe power supply ground through a capacitor C200, and the drain of the MOS tube 200 is connected to the common end of the relay LS11 through a resistor R900.

[0073] Among them, relay LS11 is a relay of model AGQ20012, which is an eight-pin relay with two open and two closed pins. The two normally closed terminals of relay LS11 are respectively connected to the current signal input terminal of the main control chip through two fifth circuits. There are two current conversion circuits, and the output terminals of the two current conversion circuits are connected to the two common terminals of relay LS11. The current conversion circuit uses the voltage-current conversion chip U8 of model XTR111, which can output (4-20) mA current with high linearity.

[0074] exist Figure 6 In the figure, I_S_CS4812, I_S_SCK4812 and I_S_SDL4812 are the signals output from the output end of the main control chip. O_A_VOL.M1 and O_A_VOL.M2 are connected to the main control chip (used during self-test), and O_A_CUR.E1~2 are the output signals of the current signal output circuit, which are connected to the mining explosion-proof electric control system to be tested (used during testing).

[0075] The testing and self-checking principles of the current signal output circuit are the same as those of the resistance signal output circuit.

[0076] Specific:

[0077] The current signal output circuit is designed to output 2 channels, the output current (4~20)mA is continuously adjustable, and the resolution is 0.5mA.

[0078] The current signal output circuit has a self-diagnosis function. By controlling the relay LS11 to switch to the self-loop state through the host computer, it can perform self-check on its own current output channel.

[0079] The current signal output circuit outputs the current input detection data according to the current input setting data of the host computer, switches through relay LS11, and reads back to the main control chip to complete the self-test function.

[0080] The current signal output circuit outputs the current input detection data according to the current input setting data of the host computer, switches to the output state through the relay LS11, and the wiring harness is connected to the mining explosion-proof electric control system to be tested. The host computer reads the current input response data of the mining explosion-proof electric control system and compares the current input response data with the current input setting data to determine whether the current output channel of the mining explosion-proof electric control system is qualified.

[0081] In this specific embodiment, Figure 7 As shown: the switch signal output circuit includes relay LS12, relay LS13 and relay LS14; the relay LS12, relay LS13 and relay LS14 are two-open and two-closed type relays, the two normally closed ends of the relay LS12 are respectively connected to the non-intrinsically safe power supply and the intrinsically safe power supply, the two normally open ends of the relay LS12 are respectively connected to the non-intrinsically safe power supply ground and the intrinsically safe power supply ground, the non-intrinsically safe common end of the relay LS12 is connected to the switch signal input channel of the main control chip through the sixth circuit, and the intrinsically safe common end of the relay LS12 is connected to the switch signal input channel of the main control chip through the seventh circuit;

[0082] The two normally open ends of the relay LS13 are respectively connected to the non-intrinsically safe common end and the intrinsically safe common end of the relay LS12, and the two common ends of the relay LS13 are connected to the switch signal input end of the mining explosion-proof electric control system to be detected;

[0083] The two normally open ends of the relay LS14 are connected to the intrinsically safe common end of the relay LS12, and the two common ends of the relay LS14 are connected to the switch signal input end of the mining explosion-proof electric control system to be detected;

[0084] One end of the coil of the relay LS12, one end of the coil of the relay LS13, and one end of the coil of the relay LS14 are all connected to the relay power signal, and the other end of the coil of the relay LS12, the other end of the coil of the relay LS13, and the other end of the coil of the relay LS14 are all connected to the output end of the relay drive chip;

[0085] The sixth circuit includes a resistor R12, a resistor R13, a resistor R14, a constant current diode D2, a voltage stabilizing diode D3, an optocoupler U5, a Schmitt trigger inverter U6, a capacitor C5 and a capacitor C6; one end of the resistor R12 is connected to the non-intrinsically safe common end of the relay LS12, the other end of the resistor R12 is also connected to the ground through the capacitor C5 and the voltage stabilizing diode D3, the other end of the resistor R12 is also connected to the input end of the optocoupler U5 through the constant current diode D2, and an output end of the optocoupler U5 is connected to the Schmitt trigger inverter U6. The input end of the Schmitt trigger inverter U6 is connected to an output end of the optical coupler U5 through the resistor R13, an output end of the optical coupler U5 is also connected to the power supply end of the Schmitt trigger inverter U6 through the resistor R14 and the capacitor C6, the other output end of the optical coupler U5 and the grounding end of the Schmitt trigger inverter U6 are grounded, and the output end of the Schmitt trigger inverter U6 is connected to the non-intrinsically safe switch signal input end of the main control chip; the sixth circuit is used to read back the non-intrinsically safe signal, and its output end SW_M.2 is output to the main control chip;

[0086] The seventh circuit includes a resistor R15, a resistor R16, a capacitor C7 and a Schmitt-trigger inverter U7; one end of the resistor R15 is connected to the intrinsically safe common end of the relay LS12, the other end of the resistor R15 is connected to the input end of the Schmitt-trigger inverter U7, the other end of the resistor R15 is also grounded through the resistor R16 and the capacitor C7 respectively, the grounding end of the Schmitt-trigger inverter U7 is grounded, and the output end of the Schmitt-trigger inverter U7 is connected to the intrinsically safe switch signal input end of the main control chip; the seventh circuit is used to read back the intrinsically safe signal, and its output end SW_M.2 is output to the main control chip.

[0087] exist Figure 7 In the figure, I_V_SW is a non-intrinsically safe 24V power supply, I_V_SW.EXBI is an intrinsically safe 24V power supply, O_S_SW_M.2 is a non-intrinsically safe switch signal recovery channel (connected to the switch signal input channel of the main control chip), O_S_SW_M.1 is an intrinsically safe switch signal recovery channel (connected to the switch signal input channel of the main control chip), and O_S_SW_E.1~4 are switch signal output signals output by the switch signal output circuit (connected to the mining explosion-proof electric control system to be tested through a wiring harness).

[0088] The output signal of the main control chip is connected to the relay driver chip ( Figure 7 (not shown), the relay driver chip outputs O_S_RELAY1, O_S_RELAY2 and O_S_RELAY8 correspond to control relay LS13, relay LS14 and relay LS12 respectively.

[0089] During detection, the two common terminals (intrinsically safe common terminal and non-intrinsically safe common terminal) of relay LS12 are respectively connected to the two normally open terminals of relay LS13, and the two common terminal signals of relay LS13 are connected to the mining explosion-proof electric control system to be detected through the wiring harness.

[0090] During mining, the two common terminals (intrinsically safe common terminal and non-intrinsically safe common terminal) of relay LS12 are respectively processed by the sixth circuit and the seventh circuit and then connected to the switch signal input channel of the main control chip.

[0091] The testing and self-checking principles of the switch signal output circuit are the same as those of the resistance signal output circuit.

[0092] Specific:

[0093] The switch signal output circuit is designed to output 16 channels and can be configured as a high-side switch or a low-side switch output (low: power ground, high: switch power supply output voltage).

[0094] The switch signal output circuit has a self-diagnosis function. By controlling the relay LS12 to switch to the self-loop state through the host computer, it can perform self-check on its own switch output channel.

[0095] The switch signal output circuit outputs the switch input detection data according to the switch input setting data of the host computer, switches through relay LS12, and reads back to the main control chip to complete the self-test function. Optocoupler U5 is an optical isolation device, which is used for non-intrinsically safe switch signal testing of the product to be tested. During self-test, the switch signal output circuit outputs the switch input detection data according to the switch input setting data of the host computer, and the main control chip drives relay LS12 to a fixed state (high or low), and reads back the LS12 output state to the main control chip, and compares the read-back state with the output state to confirm whether its own output is qualified.

[0096] The output of relay LS12 is connected to the input channel of relay LS13 and relay LS14, and channel expansion is achieved by controlling the relay selection (increasing the test channel only requires adding output relays). The outputs of relay LS13 and relay LS14 are connected to the switch input channel of the mining explosion-proof electric control system to be tested through the wiring harness.

[0097] During detection, the switch signal output circuit outputs the switch input detection data according to the switch input setting data of the host computer, switches to the output state through relay LS12, the output of relay LS12 is fixed, the output of relay LS12 is connected to relay LS13, the output of relay LS13 is switched, and connected to the mining explosion-proof electric control system to be tested through a wiring harness. The host computer reads the input state of the corresponding channel of the mining explosion-proof electric control system through the CAN bus, and compares it with the set output state to determine whether the switch output channel of the mining explosion-proof electric control system is qualified.

[0098] In this specific embodiment, Figure 8 As shown, the power input circuit includes a non-intrinsically safe power input subcircuit and an intrinsically safe power input subcircuit; the non-intrinsically safe power input subcircuit includes a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C8, a capacitor C9 and a signal isolation chip U8; one end of the resistor R17 is connected to the non-intrinsically safe power signal output end of the mining explosion-proof electric control system, the other end of the resistor R17 is respectively connected to one end of the resistor R18 and one end of the resistor R19, the other end of the resistor R18 is connected to the non-intrinsically safe power ground, the other end of the resistor R19 is connected to the input end of the signal isolation chip U8, the other end of the resistor R19 is also connected to the non-intrinsically safe power ground through the capacitor C8, the output end of the signal isolation chip U8 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to the intrinsically safe power ground through the capacitor C9, and the other end of the resistor R20 is also connected to the input end of the main control chip; The GND pin of the signal isolation chip U8 is connected to the intrinsically safe power supply ground, and the VCC pin of the signal isolation chip U8 is connected to the 12V isolated power supply signal; the intrinsically safe power supply input subcircuit includes a resistor R21, a resistor R22, a resistor R23, a diode D4 and a capacitor C10; one end of the resistor R21 is connected to the intrinsically safe power supply signal output end of the mining explosion-proof electric control system, the other end of the resistor R21 is respectively connected to one end of the resistor R22 and one end of the resistor R23, the other end of the resistor R22 is connected to the intrinsically safe power supply ground, the other end of the resistor R23 is connected to the middle end of the diode D4, the positive pole of the diode D4 is connected to the intrinsically safe power supply ground, one end of the capacitor C10 is connected to the intrinsically safe power supply ground, the other end of the capacitor C10 is connected to the middle end of the diode D4, the negative pole of the diode D4 is connected to the 5V isolated power supply signal, and the middle end of the diode D4 is also connected to the input end of the main control chip.

[0099] exist Figure 8In the figure, the intrinsically safe power supply voltage output by the explosion-proof electric control system for mining is connected to the main control chip after voltage division, filtering and embedding of the intrinsically safe power supply input subcircuit. In the figure, G_G_GND.EXBI is the intrinsically safe power supply ground. The input port of the intrinsically safe power supply input subcircuit is POW_IN.7. The non-intrinsically safe power supply voltage output by the explosion-proof electric control system for mining is connected to the main control chip after voltage division, filtering and isolation of the non-intrinsically safe power supply input subcircuit. In the figure, G_G_GND is the non-intrinsically safe power supply ground. The input port of the non-intrinsically safe power supply input subcircuit is POW_IN.6. POW_OUT.6 and POW_OUT.7 are connected to the input port of the main control chip.

[0100] Specifically, the power input circuit is designed with 10 input channels, which can test the intrinsically safe and non-intrinsically safe output power of the tested product. The internal self-diagnosis circuit is designed to self-check the internal sampling circuit function without connecting the tested product. The test voltage range is (0~120)V, and the test range of each channel can be adjusted by the host computer with an accuracy of ±1%.

[0101] During self-test, the main control chip switches the voltage signal output circuit to the power input circuit, and compares the output voltage of the main control chip with the voltage value collected by the power input circuit. If the comparison result is within the specified range, it is qualified.

[0102] In this specific embodiment, Fig. 9 As shown, the relay input circuit includes a relay LS14, an adjustable resistor network R24, a resistor R25, a capacitor C11, a voltage stabilizing diode D5, a constant current diode D6, an optocoupler U9 and a Schmitt trigger inverter U10;

[0103] The normally closed end of the relay LS14 is connected to the non-intrinsically safe power supply ground, the normally open end of the relay LS14 is connected to the relay power supply signal, one end of the coil of the relay LS14 is connected to the relay power supply signal, the other end of the coil of the relay LS14 is connected to the output end of the relay driver chip, and the common end of the relay LS14 is connected to the common end of the relay in the mine explosion-proof electric control system; one end of the adjustable resistance network R24 is connected to the normally open end or the normally closed end of the relay in the mine explosion-proof electric control system, the other end of the adjustable resistance network R24 is connected to the non-intrinsically safe power supply ground, the voltage regulator diode D5 and the capacitor C11 are respectively connected in parallel with the adjustable resistance network R24, and one end of the constant current diode D6 is connected to the mine explosion-proof electric control system. The constant current diode D6 is connected to the normally open end or normally closed end of the relay in the system, the other end of the constant current diode D6 is connected to an input end of the optocoupler U9, the other input end of the optocoupler U9 is connected to the non-intrinsically safe power supply ground, an output end of the optocoupler U9 is connected to the input end of the Schmitt-trigger inverter U10, an output end of the optocoupler U9 is also connected to the power supply end of the Schmitt-trigger inverter U10 through the resistor R25, the power supply end of the Schmitt-trigger inverter U10 is also connected to a 5V intrinsically safe power supply signal, the other output end of the optocoupler U9 is connected to the ground end of the Schmitt-trigger inverter U10, the ground end of the Schmitt-trigger inverter U10 is also connected to the intrinsically safe power supply ground, and the output end of the Schmitt-trigger inverter U10 is connected to the input end of the main control chip.

[0104] exist Fig. 9 In the figure, RELAY_COM is the common terminal of relay LS14. By switching relay LS14, the port state of the common terminal of relay LS14 is changed (G_G_GND: grounding state, I_V_RELAY.COM: 24V state), and the output of this port (RELAY_COM) is connected to the common terminal of the relay in the mine explosion-proof electric control system to be tested through the wiring harness. The NC terminal of the relay in the mine explosion-proof electric control system to be tested is connected to I_S_RELAY.NC1; the NO terminal of the relay in the mine explosion-proof electric control system to be tested is connected to I_S_RELAY.NO1. O_S_RELAY.NC1 and O_S_RELAY.NO1 are connected to the acquisition port of the main control chip. I_S_RELAY_RELAY.STATE is the relay control port. The output terminal of the main control chip is connected to the input terminal of the relay driver chip (not shown in the figure), and the output terminal of the relay driver chip is the relay control port.

[0105] By switching relay LS14 to change the output port state of the detection control device, the host computer switches the relay state in the mining explosion-proof electric control system to be detected through the CAN bus, reads the relay port state in the mining explosion-proof electric control system to be detected and compares it with the set value. If the state is consistent, it is judged to be qualified.

[0106] Example:

[0107] a) The NC terminal (normally closed terminal) of the relay in the mine explosion-proof electric control system to be tested is connected to I_S_RELAY.NC1, the NO terminal (normally open terminal) of the relay in the mine explosion-proof electric control system to be tested is connected to I_S_RELAY.NO1, and the COM terminal (common terminal) of the relay in the mine explosion-proof electric control system to be tested is connected to RELAY_COM.

[0108] b) Detect that the relay control port I_S_RELAY_RELAY.STATE in the control device is at a low level, and the relay common terminal RELAY_COM is switched to I_V_RELAY.COM (24V). At this time, the COM and NC terminals of the relay in the mine-proof electric control system to be detected are controlled to be connected. By reading the I_S_RELAY.NC1 status, it can be determined whether the COM and NC terminals of the relay in the mine-proof electric control system to be detected are normal; if the COM and NO terminals of the relay in the mine-proof electric control system to be detected are controlled to be connected, by reading the I_S_RELAY.NO1 status, it can be determined whether the COM and NO terminals of the relay in the mine-proof electric control system to be detected are normal.

[0109] Specific:

[0110] The relay input circuit is designed with 4 input channels, which can test the normally open, normally closed and common terminal connection status and load current of the relay in the mine explosion-proof electric control system to be tested. The internal digital circuit detects the relay connection status and has a self-diagnosis function. The internal digital circuit function can be self-checked without connecting the product to be tested. The internal sampling circuit tests the relay load current.

[0111] The host computer controls the relay input circuit to switch the load impedance to change the relay drive current, and can test relays with different load currents. The adjustable resistor network R24 is an adjustable resistor network, and setting different resistance values ​​can change the load current. The load current is sampled through the adjustable resistor network R24.

[0112] By switching relay LS14, the output port state of the relay detection circuit is changed, and this port output is connected to the detected mining explosion-proof electric control system through a wiring harness. The upper computer switches the relay state in the detected mining explosion-proof electric control system through the CAN bus, reads the port state of the detected mining explosion-proof electric control system and compares it with the set value. If the state is consistent, it is judged as qualified.

[0113] In this specific embodiment, the detection principle of the high-side and low-side switch input circuits and the H-bridge driver input circuit is the same as the detection principle of the relay input circuit.

[0114] In this specific embodiment, the solenoid valve drive input circuit is used to test the solenoid valve drive current. The current sampling reads the solenoid valve drive current through an isolated Hall current sensor, converts it into a voltage signal through a signal conversion circuit, and connects to the main control chip for data processing after filtering and embedding. The host computer can display the drive current waveform in real time, which is convenient for testers to troubleshoot. The host computer compares the drive current waveform collected by the solenoid valve drive detection circuit with the actual waveform of the product under test to confirm whether the drive current is qualified.

[0115] In this specific embodiment, the communication circuit can test various communication functions of the product to be tested, such as ECU calibration CAN, ECU diagnosis CAN, methane controller CAN, etc.

[0116] In this specific embodiment, the main control chip can be an MCU device or an FPGA device.

[0117] In a detection platform of a mining explosion-proof electric control system of the present invention, the host computer sends sensor setting data to the detection control device through the CAN bus, and the main control chip controls the signal output module to generate a sensor detection signal (one or more of frequency, resistance, voltage, current and switch). The sensor detection signal is connected to the product to be tested through a wiring harness. The product to be tested will respond to the sensor detection signal and then output sensor response data. The host computer then reads the sensor response data of the signal input channel of the product to be tested through the CAN bus and compares it with the sensor setting data. If it is within the qualified range, the detection result of this signal input channel is determined to be qualified; in addition, the host computer The host computer can also send drive and communication setting data to the product to be tested through the CAN bus, and the product to be tested will respond to the drive and communication setting data and then output drive and communication response signals (power supply, relay, high and low side switch, H bridge drive, solenoid valve drive and CAN communication), and this drive and communication response signal is connected to the detection control device through a wiring harness, and the drive input and communication detection module detects the drive and communication response signal to obtain a drive and communication detection signal, and the host computer reads the drive and communication detection signal in the form of data through the CAN bus, and compares it with the drive and communication setting data. If it is within the qualified range, this channel detection result is judged to be qualified. Therefore, the present invention can fully and automatically detect the signal input, drive output and communication channel of different mining explosion-proof electric control systems, reduce manual participation, and improve production efficiency.

[0118] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection platform for explosion-proof electric control systems for mines, characterized by: It includes a host computer and a detection control device, wherein the detection control device includes a control chip, a signal output module and a drive input and communication detection module; the input end of the signal output module is connected to the signal output end of the control chip, the output end of the drive input and communication detection module is connected to the signal input end of the control chip, the output end of the signal output module is used to connect to the signal input end of the mine explosion-proof electric control system to be detected, and the input end of the drive input and communication detection module is used to connect to the drive output and communication end of the mine explosion-proof electric control system to be detected; The host computer is connected to the control chip and the mining explosion-proof electric control system via a CAN bus. The host computer is used to send sensor setting data to the control chip; the control chip is used to control the signal output module to generate a sensor detection signal according to the sensor setting data; the signal output module is used to transmit the sensor detection signal to the mining explosion-proof electric control system; The mining explosion-proof electric control system is used to respond to the sensor detection signal, output sensor response data, and transmit the sensor response data to the host computer; the host computer is used to compare the sensor setting data with the sensor response data, and judge whether the signal input channel of the mining explosion-proof electric control system is qualified through the comparison result; The host computer is used to send drive and communication setting data to the mining explosion-proof electric control system; The mining explosion-proof electric control system is used to respond to the drive and communication setting data, generate a drive and communication response signal, and transmit the drive and communication response signal to the drive input and communication detection module; the drive input and communication detection module is used to detect the drive and communication response signal, obtain the drive and communication detection signal, and transmit the drive and communication detection signal to the control chip; The control chip is used to transmit the driving and communication detection signals to the host computer in the form of data; The host computer is used to compare the drive and communication setting data with the drive and communication detection signals in data form, and judge whether the drive output and communication channel of the mining explosion-proof electric control system are qualified through the comparison results.

2. The detection platform of the explosion-proof electric control system for mining according to claim 1 is characterized in that: The signal output module includes any one of a frequency signal output circuit, a resistance signal output circuit, a voltage signal output circuit, a current signal output circuit and a switch signal output circuit, or a combination of multiple circuits; the control chip includes a main control chip and a relay drive chip, and both the main control chip and the relay drive chip are connected to the host computer through a CAN bus for bidirectional communication, and the main control chip is also connected to the relay drive chip.

3. The detection platform of the explosion-proof electric control system for mining according to claim 2 is characterized in that: The frequency signal output circuit includes a relay LS1, one end of the coil of the relay LS1 is connected to the relay power signal, and the other end of the coil of the relay LS1 is connected to the output end of the relay driver chip; the common end of the relay LS1 is connected to the output end of the main control chip through a first circuit, the normally open end of the relay LS1 is connected to the frequency signal input end of the mining explosion-proof electric control system to be detected, and the normally closed end of the relay LS1 is connected to the frequency acquisition channel of the main control chip through a second circuit; The first circuit includes a transistor Q1, a resistor R1 and a resistor R2; the collector of the transistor Q1 is connected to the common end of the relay LS1, the emitter of the transistor Q1 and one end of the resistor R1 are connected to the intrinsically safe power supply ground, the collector of the transistor Q1 is connected to one end of the resistor R2, and the other end of the resistor R1 is connected to the other end of the resistor R2 and then connected to the output end of the main control chip; The second circuit includes a Schmitt-triggered inverter U1, a resistor R3, a resistor R4 and a capacitor C1; an input pin of the Schmitt-triggered inverter U1 is connected to the normally closed end of the relay LS1, and the input pin of the Schmitt-triggered inverter U1 is also connected to the intrinsically safe power supply ground through the resistor R3 and the capacitor C1 respectively, the power supply pin of the Schmitt-triggered inverter U1 and one end of the resistor R4 are both connected to a 5V intrinsically safe power supply, the other end of the resistor R4 is connected to the input pin of the Schmitt-triggered inverter U1, the ground pin of the Schmitt-triggered inverter U1 is connected to the intrinsically safe power supply ground, and the output pin of the Schmitt-triggered inverter U1 is connected to the frequency acquisition channel of the main control chip.

4. The detection platform of the explosion-proof electric control system for mining according to claim 2 is characterized in that: The resistance signal output circuit includes a digital potentiometer U2, a relay LS2, a relay LS3, a relay LS4 and a relay LS5; the signal input pin of the digital potentiometer U2 is connected to the output end of the main control chip, the resistance output pin of the digital potentiometer U2 is respectively connected to the normally closed end of the relay LS2, the normally open end of the relay LS3, the normally open end of the relay LS4 and the normally open end of the relay LS5, the common end of the relay LS2 is connected to the voltage signal input end of the main control chip through a third circuit, the common end of the relay LS3, the common end of the relay LS4 and the common end of the relay LS5 are all connected to the resistance signal input end of the mining explosion-proof electric control system to be detected; one end of the coil of the relay LS2, one end of the coil of the relay LS3, one end of the coil of the relay LS4 and one end of the coil of the relay LS5 are all connected to the relay power supply signal; the other end of the coil of the relay LS2, the other end of the coil of the relay LS3, the other end of the coil of the relay LS4 and the other end of the coil of the relay LS5 are all connected to the output end of the relay drive chip; The third circuit includes resistors R5, R6, R7, a diode D1 and a capacitor C2; one end of the resistor R5, one end of the resistor R6 and one end of the resistor R7 are all connected to the common end of the relay LS2, the other end of the resistor R5 and the negative electrode of the diode D1 are both connected to a 5V power supply signal, the other end of the resistor R6 is connected to the positive electrode of the diode D1, the other end of the resistor R7 is connected to the middle end of the diode D1, one end of the capacitor C2 is connected to the positive electrode of the diode D1, the other end of the capacitor C2 is connected to the middle end of the diode D1, and the middle end of the diode D1 is also connected to the voltage signal input end of the main control chip.

5. The detection platform of the explosion-proof electric control system for mining according to claim 2 is characterized in that: The voltage signal output circuit includes a digital-to-analog conversion chip U3, a relay LS6, a relay LS7, a relay LS8, a relay LS9 and a relay LS10; the signal input pin of the digital-to-analog conversion chip U3 is connected to the output end of the main control chip, the VSS pin of the digital-to-analog conversion chip U3 is connected to the signal analog ground, a resistor R200 is connected between the VSS pin of the digital-to-analog conversion chip U3 and the output pin VOUTB of the digital-to-analog conversion chip U3, the LDAC pin of the digital-to-analog conversion chip U3 is connected to the signal analog ground through a resistor R300, the output pin VOUTA and the output pin VOUTB of the digital-to-analog conversion chip U3 are respectively connected to the normally closed end of the relay LS6, the normally open end of the relay LS7, the normally open end of the relay LS8, the normally open end of the relay LS9 and the normally open end of the relay LS10 through an inductor L1 and an inductor L2. The common end of the relay LS6 is connected to the normally open end of the main control chip through the fourth circuit, and the common end of the relay LS7, the common end of the relay LS8, the common end of the relay LS9 and the common end of the relay LS10 are connected to the voltage signal input end of the mining explosion-proof electric control system to be detected; one end of the coil of the relay LS6, the one end of the coil of the relay LS7, the one end of the coil of the relay LS8, the one end of the coil of the relay LS9 and the one end of the coil of the relay LS10 are all connected to the relay power supply signal, and the other end of the coil of the relay LS6, the other end of the coil of the relay LS7, the other end of the coil of the relay LS8, the other end of the coil of the relay LS9 and the other end of the coil of the relay LS10 are connected to the output end of the relay drive chip; The fourth circuit includes a resistor R8, a resistor R9 and a capacitor C3; one end of the resistor R8 and one end of the resistor R9 are both connected to the common end of the relay LS6, the other end of the resistor R8 and the other end of the resistor R9 are respectively connected to the two ends of the capacitor C3, the end of the capacitor C3 connected to the resistor R8 is connected to the voltage signal input end of the main control chip, and the end of the capacitor C3 connected to the resistor R9 is also connected to the intrinsically safe power supply ground.

6. The detection platform of the explosion-proof electric control system for mining according to claim 2 is characterized in that: The current signal output circuit includes a digital-to-analog conversion chip U4, a current conversion circuit and a relay LS11; the signal input end of the digital-to-analog conversion chip U4 is connected to the output end of the main control chip, the output end of the digital-to-analog conversion chip U4 is connected to the input end of the current conversion circuit, the output end of the current conversion circuit is connected to the common end of the relay LS11, the normally closed end of the relay LS11 is connected to the current signal input end of the main control chip through a fifth circuit, the normally open end of the relay LS11 is connected to the current signal input end of the mining explosion-proof electric control system to be detected, one end of the coil of the relay LS11 is connected to the relay power supply signal, and the other end of the coil of the relay LS11 is connected to the relay digital signal; The fifth circuit includes a resistor R10, a resistor R11 and a capacitor C4, one end of the resistor R10 and one end of the resistor R11 are both connected to the normally closed end of the relay LS11, the other end of the resistor R10 is grounded, the other end of the resistor R11 is grounded through the capacitor C4, and the other end of the resistor R11 is connected to the current signal input end of the main control chip; The current conversion circuit includes a voltage-current conversion chip U8, a transistor Q100 and a MOS tube 200; the GND1 pin, the OD pin and the GND2 pin of the voltage-current conversion chip U8 are connected to the intrinsically safe power supply ground, the SET pin of the voltage-current conversion chip U8 is connected to the intrinsically safe power supply ground through a resistor R400, the VIN pin of the voltage-current conversion chip U8 is connected to the output end of the digital-to-analog conversion chip U4 through a resistor R500, the REGF pin of the voltage-current conversion chip U8 is connected to the intrinsically safe power supply ground through a capacitor C100, the REGF pin of the voltage-current conversion chip U8 is also connected to the intrinsically safe power supply ground through a series resistor R600 and a resistor R700, the REGS pin of the voltage-current conversion chip U8 is connected to the resistor R600 and the The VG pin of the voltage-current conversion chip U8 is connected to the collector of the transistor Q100 and the gate of the MOS tube 200 respectively, the IS pin of the voltage-current conversion chip U8 is connected to the emitter of the transistor Q100, the VSP pin of the voltage-current conversion chip U8 is connected to the drain of the MOS tube 200 through a diode D100, the emitter of the transistor Q100 is connected to the source of the MOS tube 200 through a resistor R800, the base of the transistor Q100 is connected to the source of the MOS tube 200, the drain of the MOS tube 200 is connected to the intrinsically safe power supply ground through a capacitor C200, and the drain of the MOS tube 200 is connected to the common end of the relay LS11 through a resistor R900.

7. The detection platform of the explosion-proof electric control system for mining according to claim 2 is characterized in that: The switch signal output circuit includes a relay LS12, a relay LS13 and a relay LS14; the relay LS12, the relay LS13 and the relay LS14 are two-open and two-closed type relays, the two normally closed ends of the relay LS12 are respectively connected to the non-intrinsically safe power supply and the intrinsically safe power supply, the two normally open ends of the relay LS12 are respectively connected to the non-intrinsically safe power supply ground and the intrinsically safe power supply ground, the non-intrinsically safe common end of the relay LS12 is connected to the switch signal input channel of the main control chip through the sixth circuit, and the intrinsically safe common end of the relay LS12 is connected to the switch signal input channel of the main control chip through the seventh circuit; The two normally open ends of the relay LS13 are respectively connected to the non-intrinsically safe common end and the intrinsically safe common end of the relay LS12, and the two common ends of the relay LS13 are connected to the switch signal input end of the mining explosion-proof electric control system to be detected; The two normally open ends of the relay LS14 are connected to the intrinsically safe common end of the relay LS12, and the two common ends of the relay LS14 are connected to the switch signal input end of the mining explosion-proof electric control system to be detected; One end of the coil of the relay LS12, one end of the coil of the relay LS13, and one end of the coil of the relay LS14 are all connected to the relay power signal, and the other end of the coil of the relay LS12, the other end of the coil of the relay LS13, and the other end of the coil of the relay LS14 are all connected to the output end of the relay drive chip; The sixth circuit includes a resistor R12, a resistor R13, a resistor R14, a constant current diode D2, a voltage stabilizing diode D3, an optical coupler U5, a Schmitt trigger inverter U6, a capacitor C5 and a capacitor C6; one end of the resistor R12 is connected to the non-intrinsically safe common end of the relay LS12, the other end of the resistor R12 is also grounded through the capacitor C5 and the voltage stabilizing diode D3, the other end of the resistor R12 is also connected to the input end of the optical coupler U5 through the constant current diode D2, and the optical coupler An output end of U5 is connected to the input end of the Schmitt-trigger inverter U6, an output end of the optocoupler U5 is also connected to the power supply end of the Schmitt-trigger inverter U6 through the resistor R13, an output end of the optocoupler U5 is also grounded through the resistor R14 and the capacitor C6 respectively, another output end of the optocoupler U5 and the ground end of the Schmitt-trigger inverter U6 are grounded, and the output end of the Schmitt-trigger inverter U6 is connected to the non-intrinsically safe switch signal input end of the main control chip; The seventh circuit includes a resistor R15, a resistor R16, a capacitor C7 and a Schmitt-triggered inverter U7; one end of the resistor R15 is connected to the intrinsically safe common end of the relay LS12, the other end of the resistor R15 is connected to the input end of the Schmitt-triggered inverter U7, the other end of the resistor R15 is also grounded through the resistor R16 and the capacitor C7 respectively, the grounding end of the Schmitt-triggered inverter U7 is grounded, and the output end of the Schmitt-triggered inverter U7 is connected to the intrinsically safe switch signal input end of the main control chip.

8. The detection platform of the explosion-proof electric control system for mining according to any one of claims 1 to 7, characterized in that: The drive input and communication detection module includes any one of a power input circuit, a relay input circuit, a high-side and low-side switch input circuit, an H-bridge drive input circuit, a solenoid valve drive input circuit and a communication circuit, or a combination of multiple circuits; the control chip includes a main control chip and a relay drive chip, and both the main control chip and the relay drive chip are connected to the host computer through a CAN bus for bidirectional communication, and the main control chip is also connected to the relay drive chip.

9. The detection platform of the explosion-proof electric control system for mining according to claim 8, characterized in that: The power input circuit includes a non-intrinsically safe power input subcircuit and an intrinsically safe power input subcircuit; The non-intrinsically safe power input subcircuit includes a resistor R17, a resistor R18, a resistor R19, a resistor R20, a capacitor C8, a capacitor C9 and a signal isolation chip U8; one end of the resistor R17 is connected to the non-intrinsically safe power signal output end of the mining explosion-proof electric control system, the other end of the resistor R17 is respectively connected to one end of the resistor R18 and one end of the resistor R19, the other end of the resistor R18 is connected to the non-intrinsically safe power ground, the other end of the resistor R19 is connected to the input end of the signal isolation chip U8, the other end of the resistor R19 is also connected to the non-intrinsically safe power ground through the capacitor C8, the output end of the signal isolation chip U8 is connected to one end of the resistor R20, the other end of the resistor R20 is connected to the intrinsically safe power ground through the capacitor C9, and the other end of the resistor R20 is also connected to the voltage signal input end of the main control chip; the GND pin of the signal isolation chip U8 is connected to the intrinsically safe power ground, and the VCC pin of the signal isolation chip U8 is connected to the 12V isolated power signal; The intrinsically safe power input subcircuit includes a resistor R21, a resistor R22, a resistor R23, a diode D4 and a capacitor C10; one end of the resistor R21 is connected to the intrinsically safe power signal output end of the mining explosion-proof electric control system, the other end of the resistor R21 is respectively connected to one end of the resistor R22 and one end of the resistor R23, the other end of the resistor R22 is connected to the intrinsically safe power ground, the other end of the resistor R23 is connected to the middle end of the diode D4, the positive electrode of the diode D4 is connected to the intrinsically safe power ground, one end of the capacitor C10 is connected to the intrinsically safe power ground, the other end of the capacitor C10 is connected to the middle end of the diode D4, the cathode of the diode D4 is connected to the 5V isolated power signal, and the middle end of the diode D4 is also connected to the voltage signal input end of the main control chip.

10. The detection platform of the explosion-proof electric control system for mining according to claim 8, characterized in that: The relay input circuit includes a relay LS14, an adjustable resistor network R24, a resistor R25, a capacitor C11, a voltage stabilizing diode D5, a constant current diode D6, an optocoupler U9 and a Schmitt trigger inverter U10; The normally closed end of the relay LS14 is connected to the non-intrinsically safe power supply ground, the normally open end of the relay LS14 is connected to the relay power supply signal, one end of the coil of the relay LS14 is connected to the relay power supply signal, the other end of the coil of the relay LS14 is connected to the output end of the relay driver chip, and the common end of the relay LS14 is connected to the common end of the relay in the mine explosion-proof electric control system; one end of the adjustable resistance network R24 is connected to the normally open end or the normally closed end of the relay in the mine explosion-proof electric control system, the other end of the adjustable resistance network R24 is connected to the non-intrinsically safe power supply ground, the voltage regulator diode D5 and the capacitor C11 are respectively connected in parallel with the adjustable resistance network R24, and one end of the constant current diode D6 is connected to the mine explosion-proof electric control system. The constant current diode D6 is connected to the normally open end or normally closed end of the relay in the system, the other end of the constant current diode D6 is connected to an input end of the optocoupler U9, the other input end of the optocoupler U9 is connected to the non-intrinsically safe power supply ground, an output end of the optocoupler U9 is connected to the input end of the Schmitt-trigger inverter U10, an output end of the optocoupler U9 is also connected to the power supply end of the Schmitt-trigger inverter U10 through the resistor R25, the power supply end of the Schmitt-trigger inverter U10 is also connected to a 5V intrinsically safe power supply signal, the other output end of the optocoupler U9 is connected to the ground end of the Schmitt-trigger inverter U10, the ground end of the Schmitt-trigger inverter U10 is also connected to the intrinsically safe power supply ground, and the output end of the Schmitt-trigger inverter U10 is connected to the acquisition port of the main control chip.

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