Multi-channel data acquisition system and working method and device thereof

Abstract

The invention relates to the field of pressure measurement, in particular to a multichannel data acquisition system and a working method and device thereof, and the system comprises a power module, an MCU module, an ADC module, a sensor module and an Ethernet communication module. The power supply module supplies power to the multi-channel data acquisition system; the sensor module is used for outputting an analog electric signal according to the received pressure value; the ADC module is used for converting the analog electric signal into a digital electric signal; the MCU module is used for entering a standby state when receiving the rising edge electric signal from the sensor module through the ADC module, and receiving the digital electric signal; and when the MCU module in the standby state receives an acquisition instruction from the upper computer through the Ethernet communication module, the MCU module uploads a digital electric signal to the upper computer for data calculation. According to the invention, the establishment time of the hardware gating circuit is shortened, the acquisition precision and flexibility are considered, and the system establishment cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of pressure measurement, and in particular to a multi-channel data acquisition system and its working method and apparatus. Background Technology

[0002] Currently, in multi-channel pressure measurement, traditional data acquisition systems suffer from problems such as excessively long channel switching times and low communication efficiency, leading to a difficulty in balancing conversion accuracy and speed. This results in low overall acquisition frequency and slow response speed, failing to meet the demands for high precision and real-time performance. For example, during channel switching, the setup time of the hardware gating circuit is unstable, affecting acquisition accuracy. Building a more flexible system with high conversion accuracy and fast conversion speed requires significant upfront investment, resulting in high costs. Furthermore, the system's high precision makes it prone to failure, meaning its operational stability needs improvement.

[0003] Therefore, how to improve the acquisition accuracy and conversion speed of a multi-channel data acquisition system at low cost, while ensuring that the pressure step response time is no greater than conventional requirements, and improve the overall efficiency and reliability of data acquisition, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-channel data acquisition system and its working method and apparatus to solve the problems in the prior art where multi-channel data acquisition systems cannot simultaneously achieve low cost, high acquisition accuracy and conversion speed, and have poor operational stability.

[0005] To address the aforementioned technical problems, this invention provides a multi-channel data acquisition system, comprising a power supply module, an MCU module, an ADC module, a sensor module, and an Ethernet communication module;

[0006] The power module is used to supply power to the multi-channel data acquisition system;

[0007] The sensor module is used to output an analog electrical signal based on the received pressure value;

[0008] The ADC module is used to convert the analog electrical signal into a digital electrical signal;

[0009] The Ethernet communication module is used to connect to the host computer;

[0010] The MCU module is configured to enter a standby state when it receives a rising edge electrical signal from the sensor via the ADC module, and receive the digital electrical signal; when the MCU module in the standby state receives a data acquisition command from the host computer via the Ethernet communication module, it uploads the digital electrical signal to the host computer for data processing.

[0011] Optionally, in the multi-channel data acquisition system, the MCU module is connected to the Ethernet communication module and / or the ADC module via an SPI interface.

[0012] Optionally, in the multi-channel data acquisition system, the MCU module uses a four-wire communication mode.

[0013] Optionally, in the multi-channel data acquisition system, the ADC module includes multiple analog-to-digital converter chips, which support the gating output of differential eight-channel dual-channel signals.

[0014] Optionally, in the multi-channel data acquisition system, the ADC module performs data conversion using a continuous averaging mode.

[0015] Optionally, in the multi-channel data acquisition system, the MCU module processes the digital electrical signal using a bilinear compensation algorithm.

[0016] Optionally, the multi-channel data acquisition system also includes a storage module;

[0017] The storage module is used to store the digital electrical signals received by the MCU module.

[0018] A method for operating a multi-channel data acquisition system, wherein the method is used in any of the aforementioned multi-channel data acquisition systems, comprising:

[0019] Determine whether the rising edge electrical signal has been received;

[0020] When the rising edge electrical signal is received, the MCU module is adjusted to enter standby mode and receive the digital electrical signal;

[0021] Determine whether the MCU module in the standby state has received the acquisition command;

[0022] When the MCU module in the standby state receives the acquisition command, it uploads the digital electrical signal to the host computer for data processing.

[0023] Optionally, in the operating method of the multi-channel data acquisition system, before determining whether the rising edge electrical signal has been received, the method further includes:

[0024] The multi-channel data acquisition system is powered on via the power module.

[0025] Configure the conversion parameters of the ADC module to complete the initialization of the ADC module;

[0026] Configure the Ethernet protocol chip for the Ethernet communication module to complete the initialization of the Ethernet communication module.

[0027] A working device for a multi-channel data acquisition system, the working device corresponding to any of the multi-channel data acquisition systems described above, comprising:

[0028] The first judgment module is used to determine whether the rising edge electrical signal has been received;

[0029] A standby module is used to adjust the MCU module to enter a standby state and receive the digital electrical signal when the rising edge electrical signal is received;

[0030] The second judgment module is used to determine whether the MCU module in the standby state has received the acquisition command;

[0031] The acquisition module is used to upload the digital electrical signal to the host computer for data processing when the MCU module in the standby state receives the acquisition command.

[0032] The multi-channel data acquisition system provided by this invention includes a power supply module, an MCU module, an ADC module, a sensor module, and an Ethernet communication module. The power supply module supplies power to the multi-channel data acquisition system. The sensor module outputs an analog electrical signal based on the received pressure value. The ADC module converts the analog electrical signal into a digital electrical signal. The Ethernet communication module connects to a host computer. The MCU module, upon receiving a rising edge electrical signal from the sensor via the ADC module, enters a standby state and receives the digital electrical signal. When the MCU module in the standby state receives an acquisition command from the host computer via the Ethernet communication module, it uploads the digital electrical signal to the host computer for data processing.

[0033] In this invention, the MCU module enters a low-power standby state upon receiving a rising edge electrical signal from the hardware circuit. The digital signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command), significantly shortening the hardware gating circuit setup time and balancing acquisition accuracy and flexibility. Furthermore, compared to existing technologies, it eliminates the need for a high-precision hardware trigger chain; hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), while soft triggering is implemented by software in the host computer, thereby greatly reducing system setup costs. This invention also provides a method and apparatus for operating a multi-channel data acquisition system with the aforementioned beneficial effects. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 A schematic diagram of a specific embodiment of the multi-channel data acquisition system provided by the present invention;

[0036] Figure 2 A timing logic diagram of a specific implementation of the multi-channel data acquisition system provided by the present invention;

[0037] Figure 3 A flowchart illustrating a specific implementation of the working method of the multi-channel data acquisition system provided by the present invention;

[0038] Figure 4 This is a flowchart illustrating a specific embodiment of the working device of the multi-channel data acquisition system provided by the present invention.

[0039] Figure label:

[0040] 10-Power supply module; 20-ADC module; 30-Ethernet communication module; 40-MCU module; 50-Sensor module; 100-First judgment module; 200-Standby module; 300-Second judgment module; 400-Acquisition module. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] The core of this invention is to provide a multi-channel data acquisition system, the structural diagram of one specific embodiment of which is shown below. Figure 1 As shown, this is referred to as Specific Implementation Method 1, which includes a power supply module 10, an MCU module 40, an ADC module 20, a sensor module 50, and an Ethernet communication module 30.

[0043] The power module 10 is used to supply power to the multi-channel data acquisition system;

[0044] The sensor module 50 is used to output an analog electrical signal based on the received pressure value;

[0045] The ADC module 20 is used to convert the analog electrical signal into a digital electrical signal;

[0046] The Ethernet communication module 30 is used to connect to the host computer;

[0047] The MCU module 40 is used to enter a standby state when it receives the rising edge electrical signal from the sensor through the ADC module 20, and to receive the digital electrical signal; when the MCU module 40 in the standby state receives the acquisition command from the host computer through the Ethernet communication module 30, it uploads the digital electrical signal to the host computer for data processing.

[0048] In the standby state, the initialization of the ADC module 20 (including conversion parameter configuration) and the initialization of the Ethernet communication module 30 (Ethernet protocol chip configuration) are completed.

[0049] Specifically, the MCU module 40 is connected to the Ethernet communication module 30 and / or the ADC module 20 via an SPI interface. The SPI interface supports transmission rates up to tens of Mbps, making it suitable for speed-sensitive scenarios such as sensor data acquisition. It also has a low timing error rate and good device expandability. Of course, other interfaces can be selected according to actual needs, which will not be elaborated here.

[0050] Preferably, the MCU module 40 adopts four-wire communication. Four-wire communication has a simple hardware structure and a high transmission rate, enabling fast data transmission. Of course, other communication methods can also be used, which will not be elaborated upon here.

[0051] In one specific implementation, the MCU module 40 uses an STM32F407 microcontroller, which has high-speed processing capabilities in an integrated MCU+DSP mode, a main frequency of 168MHz, and logic control and digital signal processing capabilities. This module connects to the ADC module 20 via an SPI interface, using a four-wire communication mode to achieve fast data transmission. The MCU module 40 also includes an Ethernet communication interface, enabling network connectivity via an RJ45 interface.

[0052] Furthermore, the ADC module 20 includes multiple analog-to-digital converter chips, which support the gating and output of differential eight-channel dual-path signals. The differential eight-channel signal transmission significantly improves the signal-to-noise ratio through differential common-mode noise immunity, while the parallel data throughput of eight channels allows for independent transmission, with each channel carrying data in differential dual-path mode, meeting the requirements of high-speed interfaces.

[0053] In one specific implementation, the ADC module 20 includes eight ADG1607 chips, each supporting differential eight-channel dual-channel signal gating output. This module uses a continuous averaging mode for data conversion, with a sampling frequency of 500kHz and a channel selection interval of 2µs set via software. The number of channels supported by the system can be flexibly configured according to actual needs, up to a maximum of 64 channels.

[0054] Furthermore, the ADC module 20 performs data conversion using a continuous averaging mode. This continuous averaging mode further improves the accuracy of the collected data and the smoothness of data changes, thereby enhancing the stability of the system operation.

[0055] Preferably, the MCU module 40 processes the digital electrical signal using a bilinear compensation algorithm. The bilinear compensation algorithm further improves calculation accuracy. For example, in multi-channel pressure measurement, it can calculate parameters such as Ga0~Ga3 / Za0~Za3 / Gb0~Gb3 / Zb0~Zb3 based on product calibration parameters, and perform pressure calculations based on the currently acquired temperature, pressure, and voltage during operation.

[0056] This invention supports real-time data acquisition and uploading, meets the requirement that the pressure step response time is no more than 100ms, uses a bilinear compensation algorithm for data processing, and uses the Ethernet communication protocol to upload data, realizing real-time acquisition and uploading of multi-channel data. It overcomes the shortcomings of traditional data acquisition and control methods that are difficult to handle multiple channel acquisition tasks simultaneously, and significantly improves data acquisition efficiency.

[0057] As a preferred embodiment, it also includes a storage module;

[0058] The storage module is used to store the digital electrical signals received by the MCU module 40.

[0059] The storage module can store the digital electrical signals received by the MCU module 40, serving as a data backup to further ensure data security and system stability. In one specific implementation, the storage module includes 64GB eMMC (embedded Multi Media Card) flash memory and 512MB DDR3 SDRAM for storing acquired data and program code. This module is controlled via the GPIO (General Purpose Input / Output) ports of the MCU module to achieve data storage and retrieval.

[0060] The power module 10 includes a Li-ion battery pack with a voltage of 12V and a capacity of 5000mAh, providing the voltage and current required by the system. This module is controlled through the power interface of the MCU module 40 to achieve system power management.

[0061] The Ethernet communication module 30 adopts a terminal + state machine mode, achieving fast data transmission through optimized communication protocol code. This module includes a LAN8720 network interface chip and an MTD88F5382 protocol conversion chip, connecting to the MCU module via an SPI interface. The system uses the TCP / IP protocol for data transmission, enabling real-time uploading of multi-channel data.

[0062] Please refer to Figure 2 , Figure 2 This is the timing logic diagram of the multi-channel data acquisition system. In the diagram, hard trigger represents the state change generated by the rising edge of the electrical signal, and soft instruction refers to the acquisition instruction.

[0063] The multi-channel data acquisition system provided by this invention includes a power supply module 10, a sensor module 50, an MCU module 40, an ADC module 20, and an Ethernet communication module 30. The power supply module 10 supplies power to the multi-channel data acquisition system. The sensor module 50 outputs an analog electrical signal based on the received pressure value. The ADC module 20 converts the analog electrical signal into a digital electrical signal. The Ethernet communication module 30 connects to a host computer. The MCU module 40, upon receiving a rising edge electrical signal from the sensor via the ADC module 20, enters a standby state and receives the digital electrical signal. When the MCU module 40, in the standby state, receives an acquisition command from the host computer via the Ethernet communication module 30, it uploads the digital electrical signal to the host computer for data processing. In this invention, the MCU module 40 enters a low-power standby state after receiving the rising edge electrical signal from the hardware circuit. The digital electrical signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command). This greatly shortens the establishment time of the hardware gating circuit, balances acquisition accuracy and flexibility, and compared with the prior art, it does not require a high-precision hardware trigger chain. Hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), and soft triggering is implemented by software in the host computer, thereby greatly reducing the cost of system construction.

[0064] This invention also provides a method for operating a multi-channel data acquisition system, and a flowchart of one specific implementation is shown below. Figure 3As shown, referred to as Specific Implementation Method Two, the working method of the multi-channel data acquisition system is used in any of the above-described multi-channel data acquisition systems, including:

[0065] S101: Determine whether the rising edge electrical signal has been received.

[0066] S102: When the rising edge electrical signal is received, the MCU module 40 is adjusted to enter the standby state and receive the digital electrical signal.

[0067] S103: Determine whether the MCU module 40 in the standby state has received the acquisition command.

[0068] S104: When the MCU module 40 in the standby state receives the acquisition command, it uploads the digital electrical signal to the host computer for data processing.

[0069] For technical details regarding the working method of the multi-channel data acquisition system provided in this specific embodiment, please refer to the multi-channel data acquisition system described above; the present invention will not repeat them here.

[0070] As a preferred embodiment, before determining whether the rising edge electrical signal has been received, the method further includes:

[0071] A1: Power on the multi-channel data acquisition system via the power module 10.

[0072] Of course, in actual use, simply turning on the power supply usually means that the multi-channel data acquisition system has been powered on.

[0073] A2: Configure the conversion parameters of the ADC module 20 to complete the initialization of the ADC module 20.

[0074] A3: Configure the Ethernet protocol chip in the Ethernet communication module 30 to complete the initialization of the Ethernet communication module 30.

[0075] In other words, in this preferred embodiment, after the power is turned on, the ADC module 20 and the Ethernet communication module 30 are configured directly without needing to enter the standby state after receiving the rising edge signal, thereby further improving the system operating efficiency and shortening the preparation time.

[0076] The multi-channel data acquisition method provided by this invention, wherein the working method of the multi-channel data acquisition system is used in any of the above-described multi-channel data acquisition systems, involves determining whether the rising edge electrical signal is received; when the rising edge electrical signal is received, adjusting the MCU module 40 to enter a standby state and receiving the digital electrical signal; determining whether the MCU module 40 in the standby state receives the acquisition command; when the MCU module 40 in the standby state receives the acquisition command, uploading the digital electrical signal to the host computer for data processing. In this invention, the MCU module 40 enters a low-power standby state after receiving the rising edge electrical signal from the hardware circuit. The digital electrical signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command). This greatly shortens the establishment time of the hardware gating circuit, balances acquisition accuracy and flexibility, and compared with the prior art, it does not require a high-precision hardware trigger chain. Hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), and soft triggering is implemented by software in the host computer, thereby greatly reducing the cost of system construction.

[0077] The working device of the multi-channel data acquisition system provided in the embodiments of the present invention will be described below. The working device of the multi-channel data acquisition system described below and the working method of the multi-channel data acquisition system described above can be referred to in correspondence.

[0078] Figure 4 This is a structural block diagram of the working device of the multi-channel data acquisition system provided in this embodiment of the invention. The working device of the multi-channel data acquisition system corresponds to any of the multi-channel data acquisition systems described above, and is referred to as Specific Embodiment Three. Figure 4 The working device of a multi-channel data acquisition system may include:

[0079] The first judgment module 100 is used to determine whether the rising edge electrical signal has been received;

[0080] The standby module 200 is used to adjust the MCU module 40 to enter the standby state and receive the digital electrical signal when the rising edge electrical signal is received.

[0081] The second judgment module 300 is used to determine whether the MCU module 40 in the standby state has received the acquisition command;

[0082] The acquisition module 400 is used to upload the digital electrical signal to the host computer for data processing when the MCU module 40 in the standby state receives the acquisition command.

[0083] In a preferred embodiment, the first determining module 100 further includes:

[0084] A power-on unit is used to power on the multi-channel data acquisition system via the power module 10.

[0085] An ADC configuration unit is used to configure the conversion parameters of the ADC module 20 and complete the initialization of the ADC module 20.

[0086] The Ethernet configuration unit is used to configure the Ethernet protocol chip of the Ethernet communication module 30 and complete the initialization of the Ethernet communication module 30.

[0087] The multi-channel data acquisition device provided by the present invention includes a first judgment module 100, used to determine whether the rising edge electrical signal is received; a standby module 200, used to adjust the MCU module 40 to enter a standby state and receive the digital electrical signal when the rising edge electrical signal is received; a second judgment module 300, used to determine whether the MCU module 40 in the standby state has received the acquisition command; and an acquisition module 400, used to upload the digital electrical signal to the host computer for data processing when the MCU module 40 in the standby state receives the acquisition command. In this invention, the MCU module 40 enters a low-power standby state after receiving the rising edge electrical signal from the hardware circuit. The digital electrical signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command). This greatly shortens the establishment time of the hardware gating circuit, balances acquisition accuracy and flexibility, and compared with the prior art, it does not require a high-precision hardware trigger chain. Hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), and soft triggering is implemented by software in the host computer, thereby greatly reducing the cost of system construction.

[0088] The working device of the multi-channel data acquisition system in this embodiment is used to implement the aforementioned working method of the multi-channel data acquisition system. Therefore, the specific implementation of the working device of the multi-channel data acquisition system can be found in the embodiment section of the working method of the multi-channel data acquisition system above. For example, the first judgment module 100, the standby module 200, the second judgment module 300, and the acquisition module 400 are respectively used to implement steps S101, S102, S103, and S104 in the working method of the multi-channel data acquisition system. Therefore, the specific implementation can be referred to the description of the corresponding embodiments, which will not be repeated here.

[0089] The present invention also provides a multi-channel data acquisition device, comprising:

[0090] Memory, used to store computer programs;

[0091] A processor is configured to execute the computer program to implement the steps of any of the above-described multi-channel data acquisition methods. The multi-channel data acquisition method provided by this invention, wherein the working method of the multi-channel data acquisition system is used in any of the above-described multi-channel data acquisition systems, involves determining whether the rising edge electrical signal is received; when the rising edge electrical signal is received, adjusting the MCU module 40 to enter a standby state and receiving the digital electrical signal; determining whether the MCU module 40 in the standby state receives the acquisition command; when the MCU module 40 in the standby state receives the acquisition command, uploading the digital electrical signal to the host computer for data processing. In this invention, the MCU module 40 enters a low-power standby state after receiving the rising edge electrical signal from the hardware circuit. The digital electrical signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command). This greatly shortens the establishment time of the hardware gating circuit, balances acquisition accuracy and flexibility, and compared with the prior art, it does not require a high-precision hardware trigger chain. Hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), and soft triggering is implemented by software in the host computer, thereby greatly reducing the cost of system construction.

[0092] This invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the above-described multi-channel data acquisition methods. The multi-channel data acquisition method provided by this invention, wherein the working method of the multi-channel data acquisition system is used in any of the above-described multi-channel data acquisition systems, involves determining whether a rising edge electrical signal is received; when the rising edge electrical signal is received, adjusting the MCU module 40 to enter a standby state and receiving the digital electrical signal; determining whether the MCU module 40 in the standby state receives the acquisition command; and when the MCU module 40 in the standby state receives the acquisition command, uploading the digital electrical signal to the host computer for data processing. In this invention, the MCU module 40 enters a low-power standby state after receiving the rising edge electrical signal from the hardware circuit. The digital electrical signal is only uploaded when the specific business logic of the host computer is satisfied and a data acquisition command is sent. This method achieves underlying synchronization preparation through hard triggering (i.e., the rising edge electrical signal) and controls the timing of actual data collection through soft triggering (i.e., the data acquisition command). This greatly shortens the establishment time of the hardware gating circuit, balances acquisition accuracy and flexibility, and compared with the prior art, it does not require a high-precision hardware trigger chain. Hard triggering only requires a basic level signal (i.e., the rising edge electrical signal), and soft triggering is implemented by software in the host computer, thereby greatly reducing the cost of system construction.

[0093] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0094] It should be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0095] The multi-channel data acquisition system and its working method and apparatus provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A multi-channel data acquisition system, characterized in that, Includes a power supply module, MCU module, ADC module, sensor module, and Ethernet communication module; The power module is used to supply power to the multi-channel data acquisition system; The sensor module is used to output an analog electrical signal based on the received pressure value; The ADC module is used to convert the analog electrical signal into a digital electrical signal; The Ethernet communication module is used to connect to the host computer; The MCU module is configured to enter a standby state when it receives a rising edge electrical signal from the sensor module via the ADC module, and receive the digital electrical signal; when the MCU module in the standby state receives a data acquisition command from the host computer via the Ethernet communication module, it uploads the digital electrical signal to the host computer for data processing.

2. The multi-channel data acquisition system as described in claim 1, characterized in that, The MCU module is connected to the Ethernet communication module and / or the ADC module via an SPI interface.

3. The multi-channel data acquisition system as described in claim 1, characterized in that, The MCU module uses a four-wire communication mode.

4. The multi-channel data acquisition system as described in claim 1, characterized in that, The ADC module includes multiple analog-to-digital converter chips, which support the gating output of differential eight-channel dual-channel signals.

5. The multi-channel data acquisition system as described in claim 4, characterized in that, The ADC module performs data conversion using a continuous mean mode.

6. The multi-channel data acquisition system as described in claim 1, characterized in that, The MCU module processes the digital electrical signal using a bilinear compensation algorithm.

7. The multi-channel data acquisition system according to any one of claims 1 to 6, characterized in that, It also includes a storage module; The storage module is used to store the digital electrical signals received by the MCU module.

8. A method for operating a multi-channel data acquisition system, characterized in that, The operating method of the multi-channel data acquisition system is used in the multi-channel data acquisition system as described in any one of claims 1 to 7, comprising: Determine whether the rising edge electrical signal has been received; When the rising edge electrical signal is received, the MCU module is adjusted to enter standby mode and receive the digital electrical signal; Determine whether the MCU module in the standby state has received the acquisition command; When the MCU module in the standby state receives the acquisition command, it uploads the digital electrical signal to the host computer for data processing.

9. The working method of the multi-channel data acquisition system as described in claim 8, characterized in that, Before determining whether the rising edge electrical signal has been received, the process also includes: The multi-channel data acquisition system is powered on via the power module. Configure the conversion parameters of the ADC module to complete the initialization of the ADC module; Configure the Ethernet protocol chip for the Ethernet communication module to complete the initialization of the Ethernet communication module.

10. A working device for a multi-channel data acquisition system, characterized in that, The working device of the multi-channel data acquisition system corresponds to the multi-channel data acquisition system as described in claim 8, and includes: The first judgment module is used to determine whether the rising edge electrical signal has been received; A standby module is used to adjust the MCU module to enter a standby state and receive the digital electrical signal when the rising edge electrical signal is received; The second judgment module is used to determine whether the MCU module in the standby state has received the acquisition command; The acquisition module is used to upload the digital electrical signal to the host computer for data processing when the MCU module in the standby state receives the acquisition command.

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