Aluminum electrolysis multifunctional unit acquisition device

Abstract

The invention discloses an aluminum electrolysis multifunctional unit acquisition device which comprises a microcontroller circuit 1, an x-axis magnetic field detection circuit 2, a y-axis magnetic field detection circuit 3, a z-axis magnetic field detection circuit 4, a voltage detection circuit 5, a current detection circuit 6, an Ethernet communication circuit 7 and an industrial serial port touch screen circuit 8. The x-axis magnetic field intensity, the y-axis magnetic field intensity, the z-axis magnetic field intensity, the input voltage value and the input current value are monitored in real time through the microcontroller, displayed on the industrial serial port touch screen circuit 7 in real time and uploaded to a server through the Ethernet communication circuit 8. Voltage, current and three-axis magnetic fields (an x-axis magnetic field, a y-axis magnetic field and a z-axis magnetic field) of an aluminum electrolysis multifunctional unit, a main working motor and other equipment can be collected in real time, and monitored data are uploaded and used for real-time monitoring and subsequent analysis and diagnosis of fault causes such as rail gnawing of motors, bearings and wheels under the high-intensity magnetic field.

Description

Technical Field

[0001] The invention relates to the electronic technical field of a multifunctional aluminum electrolysis unit collection device. Background Art

[0002] The aluminum electrolysis multifunctional unit is an important mechanized operating equipment in the aluminum electrolysis workshop of an aluminum electrolysis enterprise. It is a special bridge-type lifting equipment that can complete the shelling, pole replacement, covering material replenishment, slag cleaning, liquid discharge, lifting of anode busbars, lifting of upper and lower structures of the electrolysis cell and other sporadic operations of the pre-baked anode electrolysis cell. During operation, it is necessary to monitor the input voltage and input current of the aluminum electrolysis multifunctional unit in real time, and monitor the working voltage and working current of the main motors; it is used for fault analysis of the aluminum electrolysis multifunctional unit and each motor; usually, the analog input module and corresponding voltage sensor and current sensor solutions of the aluminum electrolysis multifunctional unit control PLC are used for voltage and current monitoring; however, these solutions do not The magnetic field strength monitoring is carried out taking into account the damage to the life of the equipment caused by the strong magnetic field environment in which the aluminum electrolysis multifunctional unit works. Since the busbar in the electrolysis workshop will generate a magnetic field of up to 1000 gauss during the aluminum electrolysis process, the aluminum electrolysis multifunctional unit will be in a strong magnetic field environment of up to 500 gauss when working, which can cause the aluminum electrolysis multifunctional unit to be subjected to a force of up to 400kN, resulting in an increase in the load of the aluminum electrolysis multifunctional unit, deflection force causing the wheels to gnaw the rails, eccentric wear of the bearings, increase in motor starting current, and bearings cutting the magnetic lines to form current sparks, resulting in increased bearing and motor failures and shortened life. Therefore, a collection device is needed that can perform multi-directional real-time monitoring of the magnetic field strength of multiple parts of the aluminum electrolysis multifunctional unit. Summary of the invention

[0003] The technical problem to be solved by the present invention is a data acquisition device for an aluminum electrolysis multifunctional unit, which can collect the voltage, current and three-axis magnetic field (x-axis magnetic field, y-axis magnetic field, z-axis magnetic field) of the aluminum electrolysis multifunctional unit and main working motors and other equipment in real time, and upload the monitored data for real-time monitoring and subsequent analysis and diagnosis of the causes of faults such as motors, bearings, and wheel gnawing under strong magnetic fields.

[0004] The technical solution of the present invention is: a multifunctional aluminum electrolysis unit acquisition device, comprising a microcontroller circuit, an x-axis magnetic field detection circuit, a y-axis magnetic field detection circuit, a z-axis magnetic field detection circuit, a voltage detection circuit, a current detection circuit, an Ethernet communication circuit, and an industrial serial port touch screen circuit; through the microcontroller, the x-axis magnetic field intensity, the y-axis magnetic field intensity, the z-axis magnetic field intensity, the input voltage value, and the input current value are monitored in real time, and displayed in real time to the industrial serial port touch screen circuit, and uploaded to a server through the Ethernet communication circuit.

[0005] The microcontroller circuit is composed of a microcontroller, wherein a power input terminal VDD of the microcontroller is connected to a first power source V1, and a power ground VSS of the microcontroller is connected to a common ground.

[0006] The x-axis magnetic field detection circuit is composed of a first magnetic field detection chip, a first operational amplifier, a second operational amplifier, a first resistor, and a second resistor; the power input terminal VCC of the first magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the first operational amplifier; the first operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the first operational amplifier is connected to the output terminal OUT of the first operational amplifier, and the output terminal OUT of the first operational amplifier is connected to the in-phase input terminal IN+ of the second operational amplifier; the second operational amplifier is connected to form a in-phase proportional circuit, the inverting input terminal IN- of the second operational amplifier is connected to the common ground through the first resistor, and is connected to the output terminal OUT of the second operational amplifier through the second resistor, and the output terminal OUT of the second operational amplifier is connected to the first analog input terminal ADC1 of the microcontroller.

[0007] The y-axis magnetic field detection circuit is composed of a second magnetic field detection chip, a third operational amplifier, a fourth operational amplifier, a third resistor, and a fourth resistor; the power input terminal VCC of the second magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the third operational amplifier; the third operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the third operational amplifier is connected to the output terminal OUT of the third operational amplifier, and the output terminal OUT of the third operational amplifier is connected to the in-phase input terminal IN+ of the fourth operational amplifier; the fourth operational amplifier is connected to form a in-phase proportional circuit, the inverting input terminal IN- of the fourth operational amplifier is connected to the common ground through the third resistor, and is connected to the output terminal OUT of the fourth operational amplifier through the fourth resistor, and the output terminal OUT of the fourth operational amplifier is connected to the second analog input terminal ADC2 of the microcontroller.

[0008] The z-axis magnetic field detection circuit is composed of a third magnetic field detection chip, a fifth operational amplifier, a sixth operational amplifier, a fifth resistor, and a sixth resistor; the power input terminal VCC of the third magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the fifth operational amplifier; the fifth operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the fifth operational amplifier is connected to the output terminal OUT of the fifth operational amplifier, and the output terminal OUT of the fifth operational amplifier is connected to the in-phase input terminal IN+ of the sixth operational amplifier; the sixth operational amplifier is connected to form a in-phase proportional circuit, the inverting input terminal IN- of the sixth operational amplifier is connected to the common ground through the fifth resistor, and is connected to the output terminal OUT of the sixth operational amplifier through the sixth resistor, and the output terminal OUT of the sixth operational amplifier is connected to the third analog input terminal ADC3 of the microcontroller.

[0009] The voltage detection circuit is composed of a voltage sensor chip, a seventh operational amplifier, a first AD conversion chip, a first isolation chip, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a first capacitor; the voltage input first terminal VIN1 of the voltage sensor chip is connected to an external voltage input 1 through the eleventh resistor current limiting, the voltage input second terminal VIN2 is connected to an external voltage input 2, the voltage output first terminal OUT1 is connected to an inverting input terminal IN- of the seventh operational amplifier through the eighth resistor, and the voltage output second terminal OUT2 is connected to a non-inverting input terminal IN+ of the seventh operational amplifier through the ninth resistor; the seventh operational amplifier is connected to form a differential amplifier circuit, the inverting input terminal IN- of the seventh operational amplifier is connected to an output terminal OUT of the seventh operational amplifier through the seventh resistor, and is also connected to the output terminal OUT of the seventh operational amplifier through the first capacitor, and the non-inverting input terminal I N+ is connected to the common ground through the tenth resistor, and the output terminal OUT of the seventh operational amplifier is connected to the analog input terminal Ain of the first AD conversion chip; the serial port clock terminal SCK of the first AD conversion chip is connected to the a output terminal Voa of the first isolation chip, the data input terminal Din of the first AD conversion chip is connected to the b output terminal Vob of the first isolation chip, and the data output terminal Dout of the first AD conversion chip is connected to the c input terminal Vic of the first isolation chip; the first isolation chip is connected to the microcontroller via SPI, the a input terminal Via of the first isolation chip is connected to the SPI1 clock output terminal SCK1 of the microcontroller, the b input terminal Vib of the first isolation chip is connected to the SPI1 data output terminal MOSI1 of the microcontroller, and the c output terminal Voc of the first isolation chip is connected to the SPI1 data input terminal MISO1 of the microcontroller.

[0010] The current detection circuit is composed of a current sensor chip, a second AD conversion chip, a second isolation chip, a twelfth resistor, and a second capacitor; the current input terminal IP+ of the current sensor chip is connected to an external current input, the current output terminal IP- is connected to an external current output, the power input terminal VCC is connected to a first power supply V1, the power ground GND is connected to a common ground, the output terminal VIOUT is connected to an analog input terminal Ain of the second AD conversion chip through a twelfth resistor current limiting; the analog input terminal Ain of the second AD conversion chip is connected to a common ground through a second capacitor, and the serial port clock terminal SCK is connected to a of the second isolation chip The data output terminal Voa of the second AD conversion chip is connected to the b output terminal Vob of the second isolation chip, and the data output terminal Dout of the second AD conversion chip is connected to the c input terminal Vic of the second isolation chip; the second isolation chip is connected to the microcontroller via SPI, the a input terminal Via of the second isolation chip is connected to the SPI2 clock output terminal SCK2 of the microcontroller, the b input terminal Vib of the second isolation chip is connected to the SPI2 data output terminal MOSI2 of the microcontroller, and the c output terminal Voc of the second isolation chip is connected to the SPI2 data input terminal MISO2 of the microcontroller.

[0011] The Ethernet communication circuit is composed of a first Ethernet chip; the first Ethernet chip is connected to the microcontroller via SPI, the data input terminal MOSI of the first Ethernet chip is connected to the SP3 data output terminal MOSI3 of the microcontroller, the data output terminal MISO of the first Ethernet chip is connected to the SP3 data input terminal MISO3 of the microcontroller, and the clock output terminal SCK of the first Ethernet chip is connected to the SP3 clock output terminal SCK3 of the microcontroller.

[0012] The industrial serial port touch screen circuit is composed of a first RS232 chip and an industrial serial port touch screen; the first RS232 chip is connected to a microcontroller via a serial port; a TTL transmission input terminal T1IN of the first RS232 chip is connected to a data transmission terminal TX1 of USART1 of the microcontroller, and a TTL receiving output terminal R1OUT of the first RS232 chip is connected to a data receiving terminal RX1 of USART1 of the microcontroller; the first RS232 chip is connected to the industrial serial port touch screen via an RS232 method; an RS232 transmission output terminal TIOUT of the first RS232 chip is connected to a serial port receiving terminal RX of the industrial serial port touch screen, and an RS232 receiving input terminal R1IN of the first RS232 chip is connected to a serial port transmission terminal TX of the industrial serial port touch screen.

[0013] The beneficial effect of the present invention is that a multifunctional aluminum electrolysis unit acquisition device can acquire the voltage, current and three-axis magnetic field (x-axis magnetic field, y-axis magnetic field, z-axis magnetic field) of the multifunctional aluminum electrolysis unit and the main working motor in real time, and upload the monitored data for real-time monitoring and subsequent analysis and diagnosis of the causes of faults such as motors, bearings, and wheel gnawing under strong magnetic fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a system structure block diagram of a multifunctional aluminum electrolysis unit collection device.

[0015] Figure 2 The schematic diagram of a multifunctional collection device for aluminum electrolysis.

[0016] Figure 3 The present invention is a main program flow chart of a multifunctional collection device for aluminum electrolysis units. DETAILED DESCRIPTION

[0017] The present invention is further described as follows with reference to the accompanying drawings and examples.

[0018] like Figure 1As shown, a multifunctional aluminum electrolysis unit acquisition device includes a microcontroller circuit 1, an x-axis magnetic field detection circuit 2, a y-axis magnetic field detection circuit 3, a z-axis magnetic field detection circuit 4, a voltage detection circuit 5, a current detection circuit 6, an Ethernet communication circuit 7, and an industrial serial port touch screen circuit 8; through the microcontroller, the x-axis magnetic field intensity, the y-axis magnetic field intensity, the z-axis magnetic field intensity, the input voltage value, and the input current value are monitored in real time, and displayed in real time to the industrial serial port touch screen circuit 7, and uploaded to the server through the Ethernet communication circuit 8.

[0019] like Figure 2 As shown, the microcontroller circuit 1 is composed of a microcontroller U1, a power input terminal VDD of the microcontroller U1 is connected to a first power supply V1, and a power ground VSS of the microcontroller U1 is connected to a common ground.

[0020] The x-axis magnetic field detection circuit 2 is composed of a first magnetic field detection chip U2, a first operational amplifier U3, a second operational amplifier U4, a first resistor R1, and a second resistor R2; the power input terminal VCC of the first magnetic field detection chip U2 is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the first operational amplifier U3; the first operational amplifier U3 is connected to form a voltage follower, the inverting input terminal IN- of the first operational amplifier U3 is connected to the output terminal OUT of the first operational amplifier U3, and the output terminal OUT of the first operational amplifier U3 is connected to the in-phase input terminal IN+ of the second operational amplifier U4; the second operational amplifier U4 is connected to form a in-phase proportional circuit, the inverting input terminal IN- of the second operational amplifier U4 is connected to the common ground through the first resistor R1, and is connected to the output terminal OUT of the second operational amplifier U4 through the second resistor R2, and the output terminal OUT of the second operational amplifier U4 is connected to the first analog input terminal ADC1 of the microcontroller U1.

[0021] The y-axis magnetic field detection circuit 3 is composed of a second magnetic field detection chip U5, a third operational amplifier U6, a fourth operational amplifier U7, a third resistor R3, and a fourth resistor R4; the power input terminal VCC of the second magnetic field detection chip U5 is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the third operational amplifier U6; the third operational amplifier U6 is connected to form a voltage follower, the inverting input terminal IN- of the third operational amplifier U6 is connected to the output terminal OUT of the third operational amplifier U6, and the output terminal OUT of the third operational amplifier U6 is connected to the in-phase input terminal IN+ of the fourth operational amplifier U7; the fourth operational amplifier U7 is connected to form an in-phase proportional circuit, the inverting input terminal IN- of the fourth operational amplifier U7 is connected to the common ground through the third resistor R3, and is connected to the output terminal OUT of the fourth operational amplifier U7 through the fourth resistor R4, and the output terminal OUT of the fourth operational amplifier U7 is connected to the second analog input terminal ADC2 of the microcontroller U1.

[0022] The z-axis magnetic field detection circuit 4 is composed of a third magnetic field detection chip U8, a fifth operational amplifier U9, a sixth operational amplifier U10, a fifth resistor R5, and a sixth resistor R6; the power input terminal VCC of the third magnetic field detection chip U8 is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the fifth operational amplifier U9; the fifth operational amplifier U9 is connected to form a voltage follower, the inverting input terminal IN- of the fifth operational amplifier U9 is connected to the output terminal OUT of the fifth operational amplifier U9, and the output terminal OUT of the fifth operational amplifier U9 is connected to the in-phase input terminal IN+ of the sixth operational amplifier U10; the sixth operational amplifier U10 is connected to form a in-phase proportional circuit, the inverting input terminal IN- of the sixth operational amplifier U10 is connected to the common ground through the fifth resistor R5, and is connected to the output terminal OUT of the sixth operational amplifier U10 through the sixth resistor R6, and the output terminal OUT of the sixth operational amplifier U10 is connected to the third analog input terminal ADC3 of the microcontroller U1.

[0023] The voltage detection circuit 5 is composed of a voltage sensor chip U14, a seventh operational amplifier U13, a first AD conversion chip U12, a first isolation chip U11, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a first capacitor C1; the voltage input first terminal VIN1 of the voltage sensor chip U14 is connected to the external voltage input 1 through the eleventh resistor R11 for current limiting, the voltage input second terminal VIN2 is connected to the external voltage input 2, the voltage output first terminal OUT1 is connected to the inverting input terminal IN- of the seventh operational amplifier U13 through the eighth resistor R8, and the voltage output second terminal OUT2 is connected to the non-inverting input terminal IN+ of the seventh operational amplifier U13 through the ninth resistor R9; the seventh operational amplifier U13 is connected to form a differential amplifier circuit, the inverting input terminal IN- of the seventh operational amplifier U13 is connected to the output terminal OUT of the seventh operational amplifier U13 through the seventh resistor R7, and is also connected to the output terminal OUT of the seventh operational amplifier U13 through the first capacitor C1, the seventh operational amplifier U1 3 is connected to the common ground through the tenth resistor R10, and the output terminal OUT of the seventh operational amplifier U13 is connected to the analog input terminal Ain of the first AD conversion chip U12; the serial port clock terminal SCK of the first AD conversion chip U12 is connected to the a output terminal Voa of the first isolation chip U11, the data input terminal Din of the first AD conversion chip U12 is connected to the b output terminal Vob of the first isolation chip U11, and the data output terminal Dout of the first AD conversion chip U12 is connected to the c input terminal Vic of the first isolation chip U11; the first isolation chip U11 is connected to the microcontroller U1 in SPI mode, the a input terminal Via of the first isolation chip U11 is connected to the SPI1 clock output terminal SCK1 of the microcontroller U1, the b input terminal Vib of the first isolation chip U11 is connected to the SPI1 data output terminal MOSI1 of the microcontroller U1, and the c output terminal Voc of the first isolation chip U11 is connected to the SPI1 data input terminal MISO1 of the microcontroller U1.

[0024] The current detection circuit 6 is composed of a current sensor chip U17, a second AD conversion chip U16, a second isolation chip U15, a twelfth resistor R12, and a second capacitor C2; the current input terminal IP+ of the current sensor chip U17 is connected to an external current input, the current output terminal IP- is connected to an external current output, the power input terminal VCC is connected to a first power supply V1, the power ground GND is connected to a common ground, and the output terminal VIOUT is connected to an analog input terminal Ain of the second AD conversion chip U16 through a twelfth resistor R12 current limiting; the analog input terminal Ain of the second AD conversion chip U16 is connected to a common ground through a second capacitor C2, and the serial port clock terminal SCK is connected to a of the second isolation chip U15. The output terminal Voa of the second AD conversion chip U16, the data input terminal Din of the second AD conversion chip U16 is connected to the b output terminal Vob of the second isolation chip U15, and the data output terminal Dout of the second AD conversion chip U16 is connected to the c input terminal Vic of the second isolation chip U15; the second isolation chip U15 is connected to the microcontroller U1 via SPI, the a input terminal Via of the second isolation chip U15 is connected to the SPI2 clock output terminal SCK2 of the microcontroller U1, the b input terminal Vib of the second isolation chip U15 is connected to the SPI2 data output terminal MOSI2 of the microcontroller U1, and the c output terminal Voc of the second isolation chip U15 is connected to the SPI2 data input terminal MISO2 of the microcontroller U1.

[0025] The Ethernet communication circuit 7 is composed of a first Ethernet chip U18; the first Ethernet chip U18 is connected to the microcontroller U1 via SPI, the data input terminal MOSI of the first Ethernet chip U18 is connected to the SP3 data output terminal MOSI3 of the microcontroller U1, the data output terminal MISO of the first Ethernet chip U18 is connected to the SP3 data input terminal MISO3 of the microcontroller U1, and the clock output terminal SCK of the first Ethernet chip U18 is connected to the SP3 clock output terminal SCK3 of the microcontroller U1.

[0026] The industrial serial port touch screen circuit 8 is composed of a first RS232 chip U19 and an industrial serial port touch screen U20; the first RS232 chip U19 is connected to the microcontroller U1 via a serial port; the TTL transmitting input terminal T1IN of the first RS232 chip U19 is connected to the data transmitting terminal TX1 of USART1 of the microcontroller U1, and the TTL receiving output terminal R1OUT of the first RS232 chip U19 is connected to the data receiving terminal RX1 of USART1 of the microcontroller U1; the first RS232 chip U19 is connected to the industrial serial port touch screen U20 via RS232; the RS232 transmitting output terminal TIOUT of the first RS232 chip U19 is connected to the serial port receiving terminal RX of the industrial serial port touch screen U20, and the RS232 receiving input terminal R1IN of the first RS232 chip U19 is connected to the serial port transmitting terminal TX of the industrial serial port touch screen U20.

[0027] like Figure 3 The following is the main program flow chart. The main process steps are as follows: Step 1: Power on and initialize; Step 2: voltage detection; Step 3: current detection; Step 4: x-axis magnetic field, y-axis magnetic field, and z-axis magnetic field detection; Step 5: The data is transmitted to the server via Ethernet; Step 6. Go to step 2.

[0028] It should be pointed out that the fully described invention may also have a variety of transformed and modified implementation schemes, and is not limited to the specific examples of the above-mentioned implementation modes. The above-mentioned examples are only used as illustrations of the present invention, not limitations. In short, the protection scope of the present invention includes those changes or substitutions and modifications that are obvious to ordinary technicians in this field.

Claims

1. A multifunctional aluminum electrolysis unit acquisition device, comprising a microcontroller circuit, an Ethernet communication circuit, and an industrial serial port touch screen circuit; characterized in that It also includes an x-axis magnetic field detection circuit, a y-axis magnetic field detection circuit, a z-axis magnetic field detection circuit, a voltage detection circuit, and a current detection circuit; The x-axis magnetic field detection circuit is composed of a first magnetic field detection chip, a first operational amplifier, a second operational amplifier, a first resistor, and a second resistor; the power input terminal VCC of the first magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the first operational amplifier; the first operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the first operational amplifier is connected to the output terminal OUT of the first operational amplifier, and the output terminal OUT of the first operational amplifier is connected to the in-phase input terminal IN+ of the second operational amplifier; the second operational amplifier is connected to form a common phase proportional circuit, the inverting input terminal IN- of the second operational amplifier is connected to the common ground through the first resistor, and is connected to the output terminal OUT of the second operational amplifier through the second resistor, and the output terminal OUT of the second operational amplifier is connected to the first analog input terminal ADC1 of the microcontroller; The y-axis magnetic field detection circuit is composed of a second magnetic field detection chip, a third operational amplifier, a fourth operational amplifier, a third resistor, and a fourth resistor; the power input terminal VCC of the second magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the third operational amplifier; the third operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the third operational amplifier is connected to the output terminal OUT of the third operational amplifier, and the output terminal OUT of the third operational amplifier is connected to the in-phase input terminal IN+ of the fourth operational amplifier; the fourth operational amplifier is connected to form an in-phase proportional circuit, the inverting input terminal IN- of the fourth operational amplifier is connected to the common ground through the third resistor, and is connected to the output terminal OUT of the fourth operational amplifier through the fourth resistor, and the output terminal OUT of the fourth operational amplifier is connected to the second analog input terminal ADC2 of the microcontroller; The z-axis magnetic field detection circuit is composed of a third magnetic field detection chip, a fifth operational amplifier, a sixth operational amplifier, a fifth resistor, and a sixth resistor; the power input terminal VCC of the third magnetic field detection chip is connected to the first power supply V1, the power ground GND is connected to the common ground, and the signal output terminal VOUT is connected to the in-phase input terminal IN+ of the fifth operational amplifier; the fifth operational amplifier is connected to form a voltage follower, the inverting input terminal IN- of the fifth operational amplifier is connected to the output terminal OUT of the fifth operational amplifier, and the output terminal OUT of the fifth operational amplifier is connected to the in-phase input terminal IN+ of the sixth operational amplifier; the sixth operational amplifier is connected to form an in-phase proportional circuit, the inverting input terminal IN- of the sixth operational amplifier is connected to the common ground through the fifth resistor, and is connected to the output terminal OUT of the sixth operational amplifier through the sixth resistor, and the output terminal OUT of the sixth operational amplifier is connected to the third analog input terminal ADC3 of the microcontroller; The voltage detection circuit is composed of a voltage sensor chip, a seventh operational amplifier, a first AD conversion chip, a first isolation chip, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, and a first capacitor; the voltage input first terminal VIN1 of the voltage sensor chip is connected to an external voltage input 1 through the eleventh resistor current limiting, the voltage input second terminal VIN2 is connected to an external voltage input 2, the voltage output first terminal OUT1 is connected to the inverting input terminal IN- of the seventh operational amplifier through the eighth resistor, and the voltage output second terminal OUT2 is connected to the non-inverting input terminal IN+ of the seventh operational amplifier through the ninth resistor; the seventh operational amplifier is connected to form a differential amplifier circuit, the The inverting input terminal IN- of the seventh operational amplifier is connected to the output terminal OUT of the seventh operational amplifier through the seventh resistor, and is also connected to the output terminal OUT of the seventh operational amplifier through the first capacitor. The non-inverting input terminal IN+ of the seventh operational amplifier is connected to the common ground through the tenth resistor. The output terminal OUT of the seventh operational amplifier is connected to the analog input terminal Ain of the first AD conversion chip; the serial port clock terminal SCK of the first AD conversion chip is connected to the a output terminal Voa of the first isolation chip, the data input terminal Din of the first AD conversion chip is connected to the b output terminal Vob of the first isolation chip, and the data output terminal Dout of the first AD conversion chip is connected to the c input terminal Vic of the first isolation chip; The first isolation chip is connected to the microcontroller via SPI, the a input terminal Via of the first isolation chip is connected to the SPI1 clock output terminal SCK1 of the microcontroller, the b input terminal Vib of the first isolation chip is connected to the SPI1 data output terminal MOSI1 of the microcontroller, and the c output terminal Voc of the first isolation chip is connected to the SPI1 data input terminal MISO1 of the microcontroller; The current detection circuit is composed of a current sensor chip, a second AD conversion chip, a second isolation chip, a twelfth resistor, and a second capacitor; the current input terminal IP+ of the current sensor chip is connected to an external current input, the current output terminal IP- is connected to an external current output, the power input terminal VCC is connected to a first power supply V1, the power ground GND is connected to a common ground, and the output terminal VIOUT is connected to an analog input terminal Ain of the second AD conversion chip through a twelfth resistor current limiting; the analog input terminal Ain of the second AD conversion chip is connected to a common ground through a second capacitor, the serial port clock terminal SCK is connected to an output terminal a Voa of the second isolation chip, the data input terminal Din of the second AD conversion chip is connected to an output terminal b Vob of the second isolation chip, and the data output terminal Dout of the second AD conversion chip is connected to an input terminal c Vic of the second isolation chip; The second isolation chip is connected to the microcontroller via SPI, the a input terminal Via of the second isolation chip is connected to the SPI2 clock output terminal SCK2 of the microcontroller, the b input terminal Vib of the second isolation chip is connected to the SPI2 data output terminal MOSI2 of the microcontroller, and the c output terminal Voc of the second isolation chip is connected to the SPI2 data input terminal MISO2 of the microcontroller; The Ethernet communication circuit is composed of a first Ethernet chip; the first Ethernet chip is connected to the microcontroller via SPI, the data input terminal MOSI of the first Ethernet chip is connected to the SP3 data output terminal MOSI3 of the microcontroller, the data output terminal MISO of the first Ethernet chip is connected to the SP3 data input terminal MISO3 of the microcontroller, and the clock output terminal SCK of the first Ethernet chip is connected to the SP3 clock output terminal SCK3 of the microcontroller; The industrial serial port touch screen circuit is composed of a first RS232 chip and an industrial serial port touch screen; the first RS232 chip is connected to a microcontroller via a serial port; a TTL transmission input terminal T1IN of the first RS232 chip is connected to a data transmission terminal TX1 of USART1 of the microcontroller, and a TTL receiving output terminal R1OUT of the first RS232 chip is connected to a data receiving terminal RX1 of USART1 of the microcontroller; the first RS232 chip is connected to the industrial serial port touch screen via an RS232 method; an RS232 transmission output terminal TIOUT of the first RS232 chip is connected to a serial port receiving terminal RX of the industrial serial port touch screen, and an RS232 receiving input terminal R1IN of the first RS232 chip is connected to a serial port transmission terminal TX of the industrial serial port touch screen.

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