Data acquisition card and data acquisition system

Abstract

The utility model relates to a data acquisition card and a data acquisition system, and belongs to the field of artificial intelligence. The data acquisition card comprises a signal connector, n front modules and n ADC (Analog to Digital Converter) sampling modules, the signal connector is configured to be connected with a to-be-acquired board card and transmit n power supply track signals of the to-be-acquired board card to the data acquisition card; one ADC sampling module is connected with one signal output end of the signal connector through one pre-module; each front module is configured to amplify or zoom an input power supply track signal to adapt to the input voltage range of the ADC sampling module, and each ADC sampling module is configured to sample the input power supply track signal to obtain a sampling value. The measurement accuracy can be improved.

Description

Technical Field

[0001] The present application belongs to the field of artificial intelligence, and specifically relates to a data acquisition card and a data acquisition system. Background Art

[0002] As the computing requirements of artificial intelligence applications for GPGPU (General purpose computing on Graphics Processing Units) increase, the computing performance of GPGPU is continuously improving, and its power consumption is inevitably increasing. Therefore, accurate measurement and monitoring of power consumption becomes particularly critical. The core of power consumption measurement is the measurement of current and voltage. Generally speaking, the measurement of current is usually achieved by converting it into a voltage value through a sensing resistor. Therefore, the essence of power consumption measurement lies in the measurement of voltage. It is worth noting that the voltage of GPGPU covers the voltage of multiple power rails and the voltage after the current is converted through the sensing resistor, which constitutes a wide voltage range.

[0003] Usually, power chips integrate voltage and current detection circuits, and can transmit the results to the firmware through the power management bus for users to read. However, since these detection circuits are integrated as auxiliary functions of the power chip, their sampling rate is usually low, resulting in low measurement accuracy. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a data acquisition card and a data acquisition system to improve measurement accuracy.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a data acquisition card, comprising: a signal connector, n front-end modules, and n ADC sampling modules; the signal connector has n signal input terminals and n signal output terminals, n is an integer greater than or equal to 2, and the signal connector is configured to connect a board to be acquired, and transmit n power rail signals of the board to be acquired to the data acquisition card; an ADC sampling module is connected to a signal output terminal of the signal connector through a front-end module; the front-end module is configured to amplify or scale the input power rail signal to adapt to the input voltage range of the ADC sampling module; each of the ADC sampling modules is configured to sample the input power rail signal to obtain a sampled value.

[0007] In the above embodiment, the data acquisition card with the above structure can simultaneously measure the voltage values ​​of multiple power rail signals. By adding a front-end module, the input power rail signal can be amplified or scaled to adapt to the input voltage range of the ADC sampling module, thereby improving the measurement accuracy.

[0008] The processor is combined with a possible implementation manner of the first aspect embodiment, and the front-end module includes: a buffer circuit and a differential amplifier circuit connected in sequence, the buffer circuit is connected to a signal output end of the signal connector, and the differential amplifier circuit is connected to an ADC sampling module.

[0009] In the above embodiment, a buffer circuit is added to isolate the signal output terminal from the differential amplifier circuit, thereby reducing the influence of the signal output terminal on the amplification factor of the differential amplifier circuit.

[0010] In combination with a possible implementation manner of the embodiment of the first aspect, the front module further includes: a voltage divider circuit, and the buffer circuit is connected to a signal output terminal of the signal connector through the voltage divider circuit.

[0011] In the above embodiment, a voltage divider circuit is further provided to achieve voltage division of the high voltage power rail signal, thereby adjusting the voltage to within the input range of the ADC sampling module to meet the input voltage requirement of the ADC sampling module.

[0012] In combination with a possible implementation manner of the embodiment of the first aspect, there are multiple voltage divider circuits; the front module also includes: a first selector and a second selector; the input end of the first selector is connected to a signal output end of the signal connector, the multiple output ends of the first selector are connected one-to-one with multiple voltage divider circuits, the multiple input ends of the second selector are connected one-to-one with multiple voltage divider circuits, and the output end of the second selector is connected to the buffer circuit; wherein different voltage divider circuits have different voltage divider ratios.

[0013] In the above embodiment, the first selector is used to select which voltage divider circuit the power rail signal is input to, and the second selector is used to select which voltage divider circuit the output voltage of which is output to the buffer circuit. By setting the first selector and the second selector, the voltage division ratio of the voltage divider circuit can be dynamically adjusted to adapt to power rail signals of various voltage sizes.

[0014] In combination with a possible implementation manner of the embodiment of the first aspect, the data acquisition card also includes: a processor, which is connected to the first selector and the second selector respectively; the processor is also configured to generate a first control signal and a second control signal according to the range utilization rate of the ADC sampling module, wherein the first control signal is used to control the first selector, and the second control signal is used to control the second selector.

[0015] In the above embodiment, the processor is used to generate the first control signal and the second control signal according to the range utilization rate of the ADC sampling module to control the first selector and the second selector, so as to maximize the range utilization rate of the ADC sampling module as much as possible. At the same time, a processor is added to control, so that the data acquisition card can control the first selector and the second selector without introducing third-party devices.

[0016] In combination with a possible implementation manner of the embodiment of the first aspect, the number of the differential amplifier circuits is multiple, and the front-end module also includes: a third selector and a fourth selector; the input end of the third selector is connected to the buffer circuit, and the multiple output ends of the third selector are connected one by one to multiple differential amplifier circuits, and the multiple input ends of the fourth selector are connected one by one to multiple differential amplifier circuits, and the output end of the fourth selector is connected to an ADC sampling module; wherein different differential amplifier circuits have different amplification ratios.

[0017] In the above embodiment, when there are multiple differential amplifier circuits, the amplification ratio of the differential amplifier circuit can be dynamically adjusted by setting the third selector and the fourth selector to adapt to power rail signals of various voltages.

[0018] In combination with a possible implementation manner of the embodiment of the first aspect, the differential amplifier circuit includes multiple feedback paths, each feedback path includes a feedback resistor and a selection device connected in series; wherein the feedback resistors of different feedback paths are different.

[0019] In the above embodiment, by setting a plurality of feedback paths, the amplification ratio of the differential amplifier circuit can be selected by selecting different feedback paths.

[0020] In combination with a possible implementation manner of the embodiment of the first aspect, the selection device includes at least one of a switch and a selector; when the selection device includes a switch, each feedback path corresponds to an independent switch; when the selection device includes a selector, the input ends of multiple feedback paths share one selector, and the feedback ends of multiple feedback paths share one selector.

[0021] In the above embodiment, the selection device with the above structure can reduce the design difficulty and save costs while achieving the selection purpose.

[0022] In combination with a possible implementation manner of the embodiment of the first aspect, the data acquisition card also includes: a processor and a USB interface, the USB interface is connected to the processor, the USB interface is connected to the processor, the processor is connected to each ADC sampling module, and the processor is also configured to transmit data externally through the USB interface.

[0023] In the above embodiment, the USB interface is used to transmit data to ensure a higher data transmission rate. Meanwhile, the USB interface is relatively easy to expand to support the transmission of data of multiple channels.

[0024] In a second aspect, an embodiment of the present application further provides a data acquisition system, comprising: a board to be acquired and a data acquisition card provided in the embodiment of the first aspect above and / or in combination with any possible implementation manner of the embodiment of the first aspect above, wherein the data acquisition card is connected to the board to be acquired.

[0025] Other features and advantages of the present application will be described in the following description. The purpose and other advantages of the present application can be realized and obtained through the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The above and other purposes, features and advantages of the present application will be more clear as shown in the drawings.

[0027] Figure 1 A schematic diagram of the structure of a first data acquisition card provided in an embodiment of the present application is shown.

[0028] Figure 2 A schematic diagram of the structure of a first front-end module provided in an embodiment of the present application is shown.

[0029] Figure 3 A schematic diagram of the structure of a second front-end module provided in an embodiment of the present application is shown.

[0030] Figure 4 A schematic diagram of the structure of a third front-end module provided in an embodiment of the present application is shown.

[0031] Figure 5 A schematic diagram showing the principle of a fully differential amplifier circuit provided in an embodiment of the present application is shown.

[0032] Figure 6A schematic diagram of the structure of a second data acquisition card provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following embodiments can be used as examples to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the scope of protection of the present application. It will be appreciated by those skilled in the art that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other.

[0034] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. At the same time, in the description of this application, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device.

[0035] Furthermore, the term "and / or" in this application is merely a term used to describe the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0036] In the description of the embodiments of the present application, unless otherwise clearly specified or limited, the technical term “connection” may refer to a direct electrical connection or an indirect electrical connection via an intermediate medium.

[0037] In order to accurately measure the voltage, the embodiment of the present application provides a data acquisition card and a data acquisition system.

[0038] Combine the following Figure 1 The data acquisition card provided in the embodiment of the present application is described. Figure 1 As shown, the data acquisition card includes a signal connector, n front-end modules, and n ADC sampling modules.

[0039] Among them, the signal connector is configured to be connected to the board to be collected, as a connecting bridge between the data acquisition card and the board to be collected, and is used to transmit the n power rail signals of the board to be collected to the data acquisition card. The signal connector has n signal input terminals and n signal output terminals, where n is an integer greater than or equal to 2. The signal connector includes a hardware interface, which is connected to the board to be collected through the hardware interface. The hardware interface adopts a gold finger form to facilitate plugging and unplugging and ensure stable contact. For example, the board to be collected connects all the power rail signals that need to be measured to the data acquisition card through the gold finger interface. The use of this data acquisition card requires interface design coordination with the board to be collected.

[0040] The data acquisition card may be any board that needs to measure power rail signals, for example, a GPGPU board or some other AI (Artificial Intelligence) acceleration board.

[0041] The signal connector has n signal transmission channels, one transmission channel includes a signal input end and a signal output end, and each signal transmission channel is responsible for transmitting a power rail signal.

[0042] In order to better adapt the power rail signal and better utilize the input range of the ADC sampling module, that is, to make full use of the range utilization rate of the ADC sampling module. An ADC sampling module is connected to a signal output terminal of the signal connector through a front-end module. The front-end module is configured to amplify or scale the input power rail signal to adapt the sampling rate of the ADC sampling module. Since the voltage difference of different power rail signals is large, the front-end module and the ADC sampling module are designed and configured for each signal transmission channel, which can better utilize the sampling rate of the ADC sampling module. The power rail signal is amplified or scaled by the front-end module, and the voltage is adjusted to the input range of the ADC sampling module to meet the input voltage requirement of the ADC sampling module.

[0043] An ADC sampling module is connected to a signal output terminal of the signal connector through a front module. Each ADC sampling module is configured to sample the input power rail signal to obtain a sampling value. n ADC sampling modules are used to sample the transmitted n power rail signals to achieve parallel sampling. The ADC sampling module uses a high-speed, high-precision, high-sampling rate ADC module. For example, the sampling rate can reach more than 10M and the bandwidth can reach 5MHz.

[0044] The voltage scaling of different power rail signals needs to be designed differently according to their characteristics. In this implementation, the structures and functions of different front-end modules may be different. For example, for a high-voltage power rail signal, the front-end module is used to perform voltage scaling on the high-voltage power rail signal; for a low-voltage power rail signal, the front-end module is used to perform voltage amplification on the low-voltage power rail signal.

[0045] In some possible implementations, the front module includes: a buffer circuit and a differential amplifier circuit connected in sequence, the buffer circuit is connected to a signal output terminal of the signal connector, and the differential amplifier circuit is connected to an ADC sampling module. By adding a buffer circuit, the signal output terminal and the differential amplifier circuit are isolated, and the influence of the signal output terminal on the amplification factor of the differential amplifier circuit is reduced. In this implementation, the front module can amplify the voltage of the power rail signal.

[0046] In one implementation, the differential amplifier circuit may be a fully differential amplifier circuit. The reason for using a fully differential amplifier circuit to convert the power rail signal into a differential signal is that a subsequent ADC sampling module usually requires a differential input. The buffer circuit may be a common buffer circuit currently available on the market.

[0047] In some other possible implementations, such as Figure 2 As shown, the front module also includes: a voltage divider circuit, and the buffer circuit is connected to a signal output terminal of the signal connector through the voltage divider circuit. At this time, the buffer circuit is used to isolate the voltage divider circuit from the differential amplifier circuit, and reduce the influence of the amplification factor of the differential amplifier circuit on the resistance in the voltage divider circuit. For high-voltage power rail signals, a voltage divider circuit is required to reduce the voltage; for low-voltage power rail signals, an amplifier circuit is required for amplification, and the voltage divider circuit may not be required.

[0048] In order to make full use of the range utilization rate of the ADC sampling module as much as possible, the voltage division ratio of the voltage division circuit and the gain of the differential amplifier circuit can be dynamically adjusted. In this implementation, the number of voltage division circuits can be multiple. Figure 3 As shown, the front module also includes: a first selector and a second selector. The input end of the first selector is connected to a signal output end of the signal connector, multiple output ends of the first selector are connected one by one to multiple voltage divider circuits, multiple input ends of the second selector are connected one by one to multiple voltage divider circuits, and the output end of the second selector is connected to the buffer circuit. Different voltage divider circuits have different voltage divider ratios.

[0049] The first selector is used to select which voltage divider circuit the power rail signal is input to, and the second selector is used to select which voltage divider circuit outputs the voltage to the buffer circuit. By setting the first selector and the second selector, the voltage divider ratio of the voltage divider circuit can be dynamically adjusted to adapt to power rail signals of various voltages.

[0050] In some possible implementations, the data acquisition card further includes: a processor, the processor is connected to the first selector and the second selector respectively, and the processor is also connected to each ADC sampling module. The processor is also configured to generate a first control signal and a second control signal according to the range utilization rate of the ADC sampling module, wherein the first control signal is used to control the first selector, and the second control signal is used to control the second selector, so as to maximize the range utilization rate of the ADC sampling module as much as possible. For example, assuming that by default, the first selector and the second selector both select a voltage divider circuit with a moderate voltage divider ratio. If the range utilization rate of the ADC sampling module is small at this time, the voltage divider ratio can be reduced, and then a voltage divider circuit with a smaller voltage divider ratio can be selected for voltage division to increase the range utilization rate of the ADC sampling module.

[0051] Different ADC range usage rates correspond to different first control signals and second control signals, thereby selecting different voltage division ratios. The first control signal and the second control signal can be digital signals. For example, if the number of voltage division circuits is 8, only a 3-bit digital signal is needed to select 8 voltage division circuits, such as digital signal 000 corresponds to voltage division circuit 1, digital signal 001 corresponds to voltage division circuit 2, digital signal 010 corresponds to voltage division circuit 3, digital signal 011 corresponds to voltage division circuit 4, digital signal 100 corresponds to voltage division circuit 5, digital signal 101 corresponds to voltage division circuit 6, digital signal 110 corresponds to voltage division circuit 7, and digital signal 111 corresponds to voltage division circuit 8. Different ADC range usage rates correspond to different digital control signals. The first control signal and the second control signal should be the same.

[0052] It is understandable that the first selector and the second selector may also be controlled by a third-party device outside the data acquisition card, that is, they may not be controlled by the processor.

[0053] The gain of the differential amplifier circuit can be adjusted by selecting the appropriate amplifier type, or by setting the amplifier's feedback network. The feedback network is usually composed of a resistor, or a resistor and a capacitor. The gain of the amplifier can be changed by changing the resistance value of the feedback network. For example, for an inverting amplifier, its gain can be calculated by the following formula: Av = -Rf / Rin, where Av is the gain of the amplifier, Rf is the feedback resistor, and Rin is the input resistor; by changing the value of the feedback resistor Rf, the gain of the amplifier can be changed.

[0054] In an optional implementation, Figure 4 As shown, the number of differential amplifier circuits can be multiple, and the front module also includes: a third selector and a fourth selector; the input end of the third selector is connected to the buffer circuit, the multiple output ends of the third selector are connected to multiple differential amplifier circuits one by one, the multiple input ends of the fourth selector are connected to multiple differential amplifier circuits one by one, and the output end of the fourth selector is connected to an ADC sampling module; wherein different differential amplifier circuits have different amplification ratios. In this embodiment, when the number of differential amplifier circuits is multiple, the required amplification ratio is selected by setting the third selector and the fourth selector to adapt to power supply rail signals of various voltage sizes. In this embodiment, each differential amplifier circuit can include only one feedback path.

[0055] Optionally, the third selector and the fourth selector may be controlled by the processor or by a third-party device outside the data acquisition card, that is, not by the processor. The control principle is similar to the control principle of the first selector and the second selector.

[0056] In an optional implementation, the differential amplifier circuit may include multiple feedback paths, each feedback path includes a feedback resistor and a selection device connected in series; wherein the feedback resistors of different feedback paths are different. In this implementation, by controlling the selection device, the desired feedback path can be selected, thereby selecting the desired amplification ratio to adapt to power rail signals of various voltages.

[0057] Among them, the selection device includes at least one of a switch and a selector; when the selection device includes a switch, each feedback path corresponds to an independent switch; when the selection device includes a selector, the input ends of multiple feedback paths share one selector, and the feedback ends of multiple feedback paths share one selector.

[0058] For example, in one implementation, the differential amplifier circuit may include multiple feedback paths, each feedback path may include a feedback resistor and a switch connected in series, and the feedback resistors of different feedback paths are different. By controlling whether the switch is turned on or off, the feedback path is selected, and then the amplification ratio of the amplifier is adjusted. For example, in one possible way, the schematic diagram of the full differential amplifier circuit (a type of differential amplifier circuit) can be as follows: Figure 5 As shown. The feedback path can be selected by controlling the conduction of switch S1, switch S2, and switch S3. When conducting, the upper and lower feedback paths need to correspond one to one, for example, Figure 5 If the upper feedback path is S1 conducting, then the lower feedback path should also be S1 conducting.

[0059] In a possible implementation manner, the switch S may also be controlled by a processor, and the processor controls the on and off of the switch S by outputting a control signal.

[0060] In some possible implementations, reference may also be made to the above Figure 3 The amplifier ratio can be changed by selecting the voltage division ratio as shown in the figure. For example, the feedback path can be selected by a selector. In this embodiment, two selectors can be used to select the upper feedback path and two selectors can be used to select the lower feedback path. One of the selectors is located at the feedback end of the multiple feedback paths (such as Figure 5 B in the figure) is connected to multiple feedback paths, and another selector is located at the input end of the multiple feedback paths (such as Figure 5 Point A in the figure), is also connected to multiple feedback paths, and the amplification ratio of the amplifier is adjusted by controlling the selection path of the selector.

[0061] In a possible implementation manner, the selector may also be controlled by a processor.

[0062] The above processor can also be configured to pre-process the sampled values ​​collected by each ADC sampling module to obtain the voltage average and voltage dynamic value of each power rail signal, so as to achieve accurate measurement of the voltage average and voltage dynamic value of each power rail signal. This part is not the focus of this application and will not be explained here.

[0063] In an optional implementation, Figure 6 As shown, the data acquisition card also includes: a processor and a USB interface, the USB interface is connected to the processor, and the processor is also configured to transmit data externally through the USB interface, for example, transmitting the collected voltage average value and voltage dynamic value to a computer.

[0064] The processor may be an integrated chip block, for example, a general-purpose processor, including a central processing unit (CPU), a network processor (NP), a microprocessor, etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Or the processor may also be any conventional processor, etc.

[0065] The embodiment of the present application further provides a data acquisition system, including a board to be acquired and a data acquisition card as described above, wherein the data acquisition card is connected to the board to be acquired.

[0066] The data acquisition system provided in the embodiment of the present application has the same implementation principle and technical effects as those of the aforementioned data acquisition card embodiment. For the sake of brief description, for matters not mentioned in the data acquisition system embodiment, reference may be made to the corresponding contents in the aforementioned data acquisition card embodiment.

[0067] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] In addition, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A data acquisition card, characterized in that: include: A signal connector having n signal input terminals and n signal output terminals, where n is an integer greater than or equal to 2, and the signal connector is configured to connect to a board to be acquired and transmit n power rail signals of the board to be acquired to the data acquisition card; n front-end modules and n ADC sampling modules, one ADC sampling module is connected to a signal output terminal of the signal connector through a front-end module; The front-end module is configured to amplify or scale the input power rail signal to adapt to the input voltage range of the ADC sampling module; Each of the ADC sampling modules is configured to sample an input power rail signal to obtain a sampled value.

2. The data acquisition card according to claim 1, characterized in that: The front module comprises: A buffer circuit and a differential amplifier circuit are connected in sequence, wherein the buffer circuit is connected to a signal output end of the signal connector, and the differential amplifier circuit is connected to an ADC sampling module.

3. The data acquisition card according to claim 2, characterized in that: The front module further includes: a voltage divider circuit, and the buffer circuit is connected to a signal output terminal of the signal connector through the voltage divider circuit.

4. The data acquisition card according to claim 3, characterized in that: There are multiple voltage divider circuits; the front module also includes: a first selector and a second selector; the input end of the first selector is connected to a signal output end of the signal connector, the multiple output ends of the first selector are connected one by one to multiple voltage divider circuits, the multiple input ends of the second selector are connected one by one to multiple voltage divider circuits, and the output end of the second selector is connected to the buffer circuit; wherein different voltage divider circuits have different voltage divider ratios.

5. The data acquisition card according to claim 4, characterized in that: The data acquisition card also includes: a processor, which is connected to the first selector and the second selector respectively; the processor is configured to generate a first control signal and a second control signal according to the range utilization rate of the ADC sampling module, wherein the first control signal is used to control the first selector, and the second control signal is used to control the second selector.

6. The data acquisition card according to claim 2, characterized in that: There are multiple differential amplifier circuits, and the front-end module also includes: a third selector and a fourth selector; the input end of the third selector is connected to the buffer circuit, the multiple output ends of the third selector are connected one by one to multiple differential amplifier circuits, the multiple input ends of the fourth selector are connected one by one to multiple differential amplifier circuits, and the output end of the fourth selector is connected to an ADC sampling module; wherein different differential amplifier circuits have different amplification ratios.

7. The data acquisition card according to claim 2, characterized in that: The differential amplifier circuit includes a plurality of feedback paths, each of which includes a feedback resistor and a selection device connected in series; wherein the feedback resistors of different feedback paths are different.

8. The data acquisition card according to claim 7, characterized in that: The selection device includes at least one of a switch and a selector; When the selection device includes a switch, each feedback path corresponds to an independent switch; When the selection device includes a selector, the input ends of the plurality of feedback paths share one selector, and the feedback ends of the plurality of feedback paths share one selector.

9. The data acquisition card according to any one of claims 1 to 8, characterized in that: The data acquisition card further includes: a processor and a USB interface, wherein the USB interface is connected to the processor, and the processor is connected to each ADC sampling module, and the processor is further configured to transmit data externally through the USB interface.

10. A data acquisition system, characterized in that: include: A board to be collected and a data collection card as claimed in any one of claims 1 to 9, wherein the data collection card is connected to the board to be collected.

Images