Industrial electrolytic cell voltage real-time monitoring system

Abstract

The invention provides an industrial electrolytic tank voltage real-time monitoring system, which is characterized in that a plurality of tank voltage analog front-end acquisition boards can acquire multi-path tank voltage in real time, and the plurality of tank voltage analog front-end acquisition boards transmit tank voltage monitoring data and tank temperature monitoring data to a tank voltage analog front-end main control board through a cascade bus; the problem of real-time monitoring of the cell voltage of the electrolytic cell under the condition of high common-mode voltage is solved, the problems of poor real-time performance and high cost of a switching scheme that a traditional PLC analog input channel is combined with a multi-way switch are solved, and high real-time performance of cell voltage and cell temperature monitoring is achieved with low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial electrolytic cells, and in particular to a monitoring system for real-time monitoring of the cell voltage of an electrolytic cell. Background Art

[0002] Industrial electrolytic cells are core devices in equipment such as electrolytic hydrogen production, electrolytic aluminum, and electrolytic copper. The cell voltage reflects the working status of the electrolytic cell. Abnormal fluctuations in the cell voltage may affect the electrolysis efficiency, product output, and product quality, or even cause serious accidents such as explosions and short circuits. Therefore, real-time monitoring of the cell voltage is very necessary and needs to be solved urgently, whether from the perspective of safety, production process, or economic benefits.

[0003] There are a large number of electrolytic cell units for on-site cell voltage monitoring, ranging from dozens to hundreds. As the number of units increases, the common-mode voltage gradually accumulates to hundreds of volts.

[0004] Manual monitoring uses a multimeter to inspect paper records. The inspection cycle is as long as several hours, which is inefficient and lacks real-time monitoring capabilities. At the same time, there are high currents, high temperatures, chemical pollution, etc. on site, resulting in a harsh working environment for workers and prominent safety hazards.

[0005] PLC monitoring requires a large number of analog input modules and isolated voltage transmitters, resulting in a large number of cabinets, a large footprint, and prohibitively high costs. Some solutions, such as CN119307974A, use switching devices to reduce the number of modules, which in turn reduces real-time performance while maintaining high costs. Summary of the Invention

[0006] In order to overcome the problems in the prior art of poor real-time cell voltage monitoring, high common-mode voltage due to the large number of electrolytic cell units, and the need to use multi-channel isolated voltage transmitters and circuit switching devices, which results in high costs, the present invention provides an industrial electrolytic cell voltage real-time monitoring system, which solves the problem of real-time monitoring of electrolytic cell voltage.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a real-time monitoring system for the tank voltage of an industrial electrolytic cell, which adopts a combination of a main control board of a tank voltage simulation front-end acquisition system and a tank voltage simulation front-end acquisition board, wherein the tank voltage simulation front-end acquisition boards communicate with each other and with the main control board of the tank voltage simulation front-end acquisition system via an inter-tank voltage simulation front-end acquisition board cascade communication bus; The main control board of the slot voltage analog front-end acquisition system is composed of the slot voltage analog front-end acquisition system main control board MCU, wireless communication interface, wired communication interface and slot voltage analog front-end acquisition inter-board cascade communication bus. The slot voltage analog front-end acquisition system main control board MCU and the wireless communication interface and wired communication interface realize data communication through the internal bus; The slot voltage analog front-end acquisition board consists of the slot voltage analog front-end acquisition board MCU, the slot voltage analog front-end acquisition module and the slot voltage analog front-end acquisition board cascade communication bus. The slot voltage analog front-end acquisition board MCU and the slot voltage analog front-end acquisition module realize data communication through the internal bus; The tank voltage analog front-end acquisition module is a tank voltage monitoring circuit and a tank voltage input channel circuit built by an analog front-end chip and supporting discrete electronic components.

[0008] The combination of the slot voltage analog front-end acquisition system main control board and the slot voltage analog front-end acquisition board is as follows: the number of the slot voltage analog front-end acquisition system main control board is 1, and the number of the slot voltage analog front-end acquisition boards is at least 1 and at most 255.

[0009] The combination of the slot voltage analog front-end acquisition board MCU and the slot voltage analog front-end acquisition modules inside the slot voltage analog front-end acquisition board is as follows: the number of slot voltage analog front-end acquisition board MCUs is 1, the number of slot voltage analog front-end acquisition modules is at least 1 and at most 255, and the slot voltage analog front-end acquisition modules communicate with each other through the slot voltage analog front-end acquisition module cascade bus.

[0010] The wireless communication interfaces of the main control board of the slot voltage analog front-end acquisition system include WIFI interface, BLUETOOTH interface, 4GCAT.1 interface and NB-IOT interface.

[0011] The wired communication interfaces of the main control board of the slot voltage simulation front-end acquisition system include Ethernet interface, RS485 interface, RS232 interface, CAN interface and PROFIBUS interface.

[0012] The wireless communication interface and wired communication interface of the main control board of the slot voltage simulation front-end acquisition system support protocols such as MQTT, HTTP(S), CoAP, Modbus TCP, Modbus RTU, PROFIBUS-DP, CAN 2.0A / B, and CANopen.

[0013] The tank voltage is connected to the tank voltage input channel of the tank voltage analog front-end acquisition module, and the tank temperature is connected to the tank temperature input channel of the tank voltage analog front-end acquisition module.

[0014] When the number of slot voltages to be monitored is greater than the number of input channels of the slot voltage analog front-end acquisition module, increase the number of slot voltage analog front-end acquisition modules. If it still cannot meet the requirement, increase the number of slot voltage analog front-end acquisition boards.

[0015] The beneficial effect of the present invention is that a single tank voltage simulation front-end acquisition board can collect multiple tank voltages in real time, and multiple tank voltage simulation front-end acquisition boards transmit the tank voltage monitoring data and tank temperature monitoring data to the tank voltage simulation front-end main control board through a cascade bus, which overcomes the problem of real-time monitoring of electrolytic tank voltage under high common mode voltage conditions, solves the pain points of poor real-time performance and high cost of traditional PLC analog input channels combined with multi-way switch switching solutions, and realizes high real-time performance of tank voltage and tank temperature monitoring at low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and examples.

[0017] Figure 1 This is a schematic diagram of a slot voltage analog front-end acquisition system composed of a slot voltage analog front-end acquisition system main control board and three slot voltage analog front-end acquisition boards in an embodiment of the present invention.

[0018] In the figure, 1. Slot voltage analog front-end acquisition board, 2. Slot voltage analog front-end acquisition board MCU, 3. Slot voltage analog front-end acquisition module, 4. Electrolytic cell, 5. Slot voltage analog front-end acquisition module cascade bus, 6. Slot voltage analog front-end acquisition inter-board cascade bus, 7. Slot voltage analog front-end acquisition system main control board, 8. Slot voltage analog front-end acquisition system main control board MCU, 9. WIFI interface, 10. BLUETOOTH interface, 11. 4G CAT.1 interface, 12. NB-IOT interface, 13. Ethernet interface, 14. RS485 interface, 15. RS232 interface, 16. CAN interface, 17. PROFIBUS interface. DETAILED DESCRIPTION

[0019] like Figure 1 The embodiment shown is a combination of a slot voltage analog front-end acquisition system main control board 7 and three slot voltage analog front-end acquisition boards 1, wherein the first of the three slot voltage analog front-end acquisition boards 1 has one slot voltage analog front-end acquisition module 3, the second has two slot voltage analog front-end acquisition modules 3, and the third has four slot voltage analog front-end acquisition modules 3. The slot voltage analog front-end acquisition boards 1 and the slot voltage analog front-end acquisition system main control board 7 communicate via an inter-slot voltage analog front-end acquisition board cascade bus 6; The main control board 7 of the slot voltage analog front-end acquisition system is composed of the main control board MCU8 of the slot voltage analog front-end acquisition system, a wireless communication interface, a wired communication interface and a cascade bus 6 between the slot voltage analog front-end acquisition boards. The main control board MCU8 of the slot voltage analog front-end acquisition system and the wireless communication interface and the wired communication interface realize data communication through the internal bus; The slot voltage analog front-end acquisition board 1 is composed of a slot voltage analog front-end acquisition board MCU2, a slot voltage analog front-end acquisition module 3 and a slot voltage analog front-end acquisition inter-board cascade bus 6. The slot voltage analog front-end acquisition board MCU2 and the slot voltage analog front-end acquisition module 3 realize data communication through the internal bus; The tank voltage analog front-end acquisition module 3 is a tank voltage monitoring circuit and a tank voltage input channel circuit built by an analog front-end chip and supporting discrete electronic components.

[0020] In this embodiment, the combination of the slot voltage simulation front-end acquisition system main control board 7 and the slot voltage simulation front-end acquisition board 1 is as follows: the number of the slot voltage simulation front-end acquisition system main control board 7 is 1, and the number of the slot voltage simulation front-end acquisition boards 1 is 3.

[0021] In this embodiment, the combination of the tank voltage simulation front-end acquisition board MCU2 and the tank voltage simulation front-end acquisition module 3 inside the tank voltage simulation front-end acquisition board 1 is as follows: the number of the first tank voltage simulation front-end acquisition board MCU2 is 1, and the number of the tank voltage simulation front-end acquisition module 3 is 1, corresponding to the acquisition of 73#-84# electrolytic cells; the number of the second tank voltage simulation front-end acquisition board MCU2 is 1, and the number of the tank voltage simulation front-end acquisition modules 3 is 2, corresponding to the acquisition of 49#-72# electrolytic cells; the number of the third tank voltage simulation front-end acquisition board MCU2 is 1, and the number of the tank voltage simulation front-end acquisition modules 3 is 4, corresponding to the acquisition of 1#-48# electrolytic cells; the tank voltage simulation front-end acquisition modules 3 communicate with each other through the tank voltage simulation front-end acquisition module cascade bus 5.

[0022] The wireless communication interfaces of the main control board 7 of the slot voltage analog front-end acquisition system include a WIFI interface 9 , a BLUETOOTH interface 10 , a 4G CAT.1 interface 11 and a NB-IOT interface 12 .

[0023] The wired communication interfaces of the main control board 7 of the slot voltage simulation front-end acquisition system include an Ethernet interface 13 , an RS485 interface 14 , an RS232 interface 15 , a CAN interface 16 and a PROFIBUS interface 17 .

[0024] The wireless communication interface and wired communication interface of the main control board of the slot voltage simulation front-end acquisition system support protocols such as MQTT, HTTP(S), CoAP, Modbus TCP, Modbus RTU, PROFIBUS DP, CAN 2.0A / B, and CANopen.

[0025] The tank voltage is connected to the 12-way tank voltage input channels of the tank voltage analog front-end acquisition module, and the tank temperature is connected to the 4-way tank temperature input channels of the tank voltage analog front-end acquisition module.

[0026] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A real-time monitoring system for industrial electrolytic cell voltage, characterized by: The industrial electrolytic cell voltage real-time monitoring system adopts a combination of a cell voltage simulation front-end acquisition system main control board and a cell voltage simulation front-end acquisition board. The cell voltage simulation front-end acquisition boards communicate with each other and with the cell voltage simulation front-end acquisition system main control board through an inter-cell voltage simulation front-end acquisition board cascade communication bus. The main control board of the slot voltage analog front-end acquisition system is composed of the slot voltage analog front-end acquisition system main control board MCU, wireless communication interface, wired communication interface and slot voltage analog front-end acquisition inter-board cascade communication bus. The slot voltage analog front-end acquisition system main control board MCU and the wireless communication interface and wired communication interface realize data communication through the internal bus; The slot voltage analog front-end acquisition board consists of the slot voltage analog front-end acquisition board MCU, the slot voltage analog front-end acquisition module and the slot voltage analog front-end acquisition board cascade communication bus. The slot voltage analog front-end acquisition board MCU and the slot voltage analog front-end acquisition module realize data communication through the internal bus; The tank voltage analog front-end acquisition module is a tank voltage monitoring circuit and a tank voltage input channel circuit built by an analog front-end chip and supporting discrete electronic components.

2. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1, characterized in that: The combination of the slot voltage analog front-end acquisition system main control board and the slot voltage analog front-end acquisition board is as follows: the number of the slot voltage analog front-end acquisition system main control board is 1, and the number of the slot voltage analog front-end acquisition boards is at least 1 and at most 255.

3. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1 is characterized in that: Slot voltage The combination of the slot voltage analog front-end acquisition board MCU and the slot voltage analog front-end acquisition module inside the analog front-end acquisition board is as follows: the number of slot voltage analog front-end acquisition board MCUs is 1, the number of slot voltage analog front-end acquisition modules is at least 1 and at most 255, and the slot voltage analog front-end acquisition modules communicate with each other through the slot voltage analog front-end acquisition module cascade bus.

4. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1, characterized in that: The wireless communication interfaces of the main control board of the slot voltage analog front-end acquisition system include WIFI interface, BLUETOOTH interface, 4G CAT.1 interface and NB-IOT interface.

5. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1 is characterized in that: The wired communication interfaces of the main control board of the slot voltage simulation front-end acquisition system include Ethernet interface, RS485 interface, RS232 interface, CAN interface and PROFIBUS interface.

6. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1, characterized in that: The wireless communication interface and wired communication interface of the main control board of the slot voltage simulation front-end acquisition system support protocols such as MQTT, HTTP(S), CoAP, Modbus TCP, Modbus RTU, PROFIBUS-DP, CAN 2.0A / B, and CANopen.

7. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1, characterized in that: The tank voltage is connected to the tank voltage input channel of the tank voltage analog front-end acquisition module, and the tank temperature is connected to the tank temperature input channel of the tank voltage analog front-end acquisition module.

8. The real-time monitoring system for industrial electrolytic cell voltage according to claim 1, characterized in that: When the number of slot voltages to be monitored is greater than the number of input channels of the slot voltage analog front-end acquisition module, increase the number of slot voltage analog front-end acquisition modules. If it still cannot meet the requirement, increase the number of slot voltage analog front-end acquisition boards.

Images