Measurement system and device
By introducing a communication isolation module into the automatic balancing bridge system, physical isolation between the FPGA processor and the host system is achieved, and the problems of high noise and low anti-interference ability are solved, and more stable data transmission is achieved.
Patent Information
- Application Number
- CN202510648343.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-08-26
AI Technical Summary
In the existing automatic balancing bridge system, the connection between the FPGA processor and the host system is problematic that the anti-interference ability is low.
The communication isolation module realizes physical isolation between the FPGA processor and the host system, allowing only high-frequency signals to be transmitted between the two, reducing noise and enhancing anti-interference capabilities.
Effectively reduce noise, enhance anti-interference ability, and ensure the transmission of data signals.
Smart Images
Figure CN120539484A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automatic balancing bridge impedance measurement, and in particular to a measurement system and equipment. Background Art
[0002] Automatic balancing bridge structures are often used to accurately measure circuit parameters such as resistance, capacitance, and inductance. Existing automatic balancing bridge systems have achieved high measurement accuracy and automation levels. However, the connection between the FPGA processor and the host system in these systems still suffers from high noise levels and low anti-interference capabilities. Summary of the Invention
[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a measurement system and device that can physically isolate the FPGA processor from the host system through a communication isolation module, allowing only high-frequency signals to be transmitted between the two, thereby reducing noise and enhancing anti-interference capabilities.
[0004] The measurement system of the embodiment of the first aspect of the present application includes: a signal acquisition module, the signal acquisition module is used to collect current signals and voltage signals of a device under test, and amplify and filter the current signals and the voltage signals; a data processing module, the data processing module is connected to the signal acquisition module, the data processing module is used to receive the current signals and the voltage signals after amplification and filtering, and calculate the impedance value of the device under test based on the current signals and the voltage signals; a signal generating module, one end of the signal generating module is connected to the data processing module, and the other end of the signal generating module is used to connect to the device under test, and the data processing module is further used to control the signal generating module to generate a source signal and output it to the device under test so that the device under test can output the current signal and the voltage signal; a main control module, the main control module is connected to the data processing module via a communication isolation module, the main control module is used to receive the impedance value output by the data processing module via the communication isolation module; the communication isolation module is used to physically isolate the main control module and the data processing module, and allow high-frequency signals to be transmitted between the main control module and the data processing module.
[0005] According to the measurement system of the embodiment of the present application, there are at least the following beneficial effects: by setting up a signal acquisition module, the current signal and voltage signal of the device under test are collected, so that the data processing module calculates the impedance value of the device under test based on the collected current signal and voltage signal; the setting of the signal generation module is convenient for generating a source signal to the device under test, thereby stimulating the device under test to output a current signal and a voltage signal, which is convenient for the subsequent signal acquisition module to collect; by setting up a main control module, it is convenient for the operator to centrally control the parameters of the signal acquisition module, the signal generation module and the data processing module at the main control module, and by setting up a communication isolation module to connect the main control module with the data processing module, so that the main control module and the data processing module are physically isolated, thereby reducing noise and enhancing anti-interference ability, and allowing high-frequency signals to be transmitted between the main control module and the data processing module, so that the transmission of data signals between the main control module and the data processing module can be guaranteed while reducing noise and enhancing anti-interference ability.
[0006] According to some embodiments of the present application, a power supply module is further included, one end of the power supply module is connected to an AC power supply, and the other end of the power supply module is respectively connected to the signal acquisition module, the data processing module and the signal generation module, and the power supply module is used to power the signal acquisition module, the data processing module and the signal generation module.
[0007] According to some embodiments of the present application, the communication isolation module includes a USB port isolator, one end of the USB port isolator is connected to the main control module, and the other end of the USB port isolator is connected to the data processing module.
[0008] According to some embodiments of the present application, the power supply module includes a filter, a rectifier bridge and a transformer, the input end of the filter is connected to the AC power supply, the output end of the filter is connected to the input end of the rectifier bridge, the output end of the rectifier bridge is connected to the input end of the transformer, the first output end of the transformer is respectively connected to the signal generating module and the signal acquisition module, the second output end of the transformer is respectively connected to the signal generating module and the signal acquisition module, the third output end of the transformer is connected to the data processing module, the first output end and the second output end of the transformer are used to power the analog devices of the measurement system, and the third output end of the transformer is used to power the digital devices of the measurement system.
[0009] According to some embodiments of the present application, the signal acquisition module includes a current acquisition unit and a voltage acquisition unit, the input end of the current acquisition unit is used to access the current signal, the output end of the current acquisition unit is connected to the data processing module, the input end of the voltage acquisition unit is used to access the voltage signal, the output end of the voltage acquisition unit is connected to the data processing module, the current acquisition unit is used to filter and amplify the current signal, and the voltage acquisition unit is used to filter and amplify the voltage signal.
[0010] According to some embodiments of the present application, a first analog-to-digital converter and a second analog-to-digital converter are further included, the voltage acquisition unit is connected to the data processing module through the first analog-to-digital converter, and the current acquisition unit is connected to the data processing module through the second analog-to-digital converter.
[0011] According to some embodiments of the present application, a digital-to-analog converter is further included, and the data processing module is connected to the signal generating module via the digital-to-analog converter.
[0012] According to some embodiments of the present application, a temperature sensing module is further included, which is connected to the data processing module. The temperature sensing module is used to sense the temperature of the measurement system and transmit the sensed temperature signal to the data processing module.
[0013] According to some embodiments of the present application, the ground terminal of the filter is grounded through an arc suppression coil.
[0014] The measuring device according to the second embodiment of the present application includes:
[0015] A measurement system according to an embodiment of the first aspect of the present application.
[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0018] Figure 1 A system block diagram of a measurement system according to an embodiment of the present application;
[0019] Figure 2 A schematic diagram of a USB port isolator according to an embodiment of the present application;
[0020] Figure 3 A schematic diagram of the circuit structure of a power module according to an embodiment of the present application;
[0021] Figure 4 Schematic diagram of a temperature sensor chip according to an embodiment of the present application. DETAILED DESCRIPTION
[0022] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.
[0023] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.
[0024] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.
[0025] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.
[0026] Currently, automatic balancing power supplies have been widely used in daily scenarios. Traditional automatic balancing bridges mainly rely on modules such as operational amplifiers, digital-to-analog converters, and filters to achieve automatic measurement and control of precise impedance. However, there are still some shortcomings in measurement speed, measurement range, anti-interference ability, and stability. In particular, in the connection between FPGA processors and host systems, there are generally problems with high noise and low anti-interference ability.
[0027] Based on this, this application proposes a measurement system that aims to achieve physical isolation between the FPGA processor and the host system through a communication isolation module, thereby reducing noise and enhancing anti-interference capabilities.
[0028] The following references Figure 1 The measurement system according to the embodiment of the present application is described.
[0029] It can be understood that: the measurement system of the embodiment of the present application includes a signal acquisition module, a data processing module, a signal generating module and a main control module, the signal acquisition module is used to collect the current signal and voltage signal of the device under test, and amplify and filter the current signal and voltage signal; the data processing module is connected to the signal acquisition module, the data processing module is used to receive the current signal and voltage signal after amplification and filtering, and calculate the impedance value of the device under test based on the current signal and voltage signal; one end of the signal generating module is connected to the data processing module, and the other end of the signal generating module is used to connect to the device under test, and the data processing module is also used to control the signal generating module to generate a source signal output to the device under test, so that the device under test can output the current signal and voltage signal; the main control module is connected to the data processing module through the communication isolation module, and the main control module is used to receive the impedance value output by the data processing module through the communication isolation module; the communication isolation module is used to physically isolate the main control module and the data processing module, and allow high-frequency signals to be transmitted between the main control module and the data processing module.
[0030] The beneficial effects of the measurement system of the embodiment of the present application can be manifested as follows: by setting up a signal acquisition module, the current signal and voltage signal of the device under test are collected, so that the data processing module calculates the impedance value of the device under test based on the collected current signal and voltage signal; the setting of the signal generation module is convenient for generating a source signal to the device under test, thereby stimulating the device under test to output a current signal and a voltage signal, which is convenient for the subsequent signal acquisition module to collect; by setting up a main control module, it is convenient for the operator to centrally control the parameters of the signal acquisition module, the signal generation module and the data processing module at the main control module, and by setting up a communication isolation module to connect the main control module with the data processing module, so that the main control module and the data processing module are physically isolated, thereby reducing noise and enhancing anti-interference ability, and allowing high-frequency signals to be transmitted between the main control module and the data processing module, so that the transmission of data signals between the main control module and the data processing module can be guaranteed while reducing noise and enhancing anti-interference ability.
[0031] For example, in some embodiments, reference Figure 1In this embodiment, the main control module includes an FPGA processor, and the signal generation module includes a frequency generator, a signal processing unit, and an amplifier. The main control module controls the frequency generator to output a source signal, and the source signal passes through the signal processing unit and the amplifier in sequence. The signal processing unit filters the source signal to remove noise and interference, thereby reducing noise and improving anti-interference capability, while the amplifier increases the signal strength of the source signal, promoting a better match between the source signal and the device under test, thereby promoting the device under test to output a voltage signal and a power signal. The amplifier is a phase-locked amplifier, so as to extract and amplify the source signal while suppressing noise with a frequency different from that of the source signal. The setting of the signal acquisition module facilitates the timely collection of the voltage signal and current signal output by the device under test, and filters and amplifies the voltage signal and current signal to reduce noise and enhance the anti-interference ability of the voltage signal and current signal. The setting of the data processing module facilitates the reception of the voltage signal and current signal after filtering and amplification, and calculates the impedance value of the device under test based on the voltage signal and current signal. The setting of the main control module facilitates the reception of the impedance value calculated by the data processing module. At the same time, a communication isolation module is provided between the main control module and the data processing module, so that only high-frequency signal transmission is carried out between the two, thereby reducing noise and improving anti-interference ability.
[0032] It can be understood that: the measurement system of the embodiment of the present application also includes a power supply module, one end of the power supply module is connected to an AC power supply, and the other end of the power supply module is respectively connected to the signal acquisition module, the data processing module and the signal generation module, and the power supply module is used to power the signal acquisition module, the data processing module and the signal generation module.
[0033] For example, in some embodiments, reference Figure 1 In this embodiment, one end of the power supply module is connected to AC power, which is then converted into an adaptive DC power, and then output to the signal acquisition module, data processing module and signal generation module respectively, thereby realizing power supply to the acquisition module, data processing module and signal generation module respectively, avoiding the situation where the module is damaged due to the mismatch between the current and the module.
[0034] It can be understood that the communication isolation module includes a USB port isolator, one end of the USB port isolator is connected to the main control module, and the other end of the USB port isolator is connected to the data processing module.
[0035] For example, in some embodiments, reference Figure 2 and Figure 1In this embodiment, the USB port isolator model is ADUM3160. The USB port isolator is connected to the main control module via pins 7 and 8, and to the data processing module via pins 21 and 22, thereby achieving physical isolation between the data processing module and the main control module. That is, the power signals, ground signals, and communication signals of the data processing module and the main control module are completely isolated, and only high-frequency signals are allowed to be transmitted between the data processing module and the main control module through the USB port isolator. That is, the impedance value signal calculated by the data processing module is converted into a high-frequency sequence pulse by the USB port isolator and transmitted to one end of the main control module, and the impedance value signal is restored to a digital signal. This allows the main control module to receive the output signal of the data processing module. At the same time, physical isolation can enhance anti-interference capabilities and reduce noise. The measurement system of the embodiment of the present application also includes a display module, which is connected to the main control module and can intuitively reflect the impedance value signal received by the main control module on the display module.
[0036] It can be understood that: the power supply module includes a filter, a rectifier bridge and a transformer, the input end of the filter is connected to the AC power supply, the output end of the filter is connected to the input end of the rectifier bridge, the output end of the rectifier bridge is connected to the input end of the transformer, the first output end of the transformer is connected to the signal generating module and the signal acquisition module respectively, the second output end of the transformer is connected to the signal generating module and the signal acquisition module respectively, the third output end of the transformer is connected to the data processing module, the first output end and the second output end of the transformer are used to power the analog devices of the measurement system, and the third output end of the transformer is used to power the digital devices of the measurement system.
[0037] For example, in some embodiments, reference Figure 3 In this embodiment, one end of the filter is connected to an AC power with a voltage of 200V, and the other end of the filter is connected to a rectifier bridge, so as to filter the input AC power, enhance the anti-interference ability and reduce the noise before transmitting it to the rectifier bridge. After passing through the rectifier bridge, the AC power is converted into DC power and output to the transformer. The DC power is subjected to a voltage drop through the transformer to reduce the voltage of the AC power to an appropriate range to avoid excessive voltage and damage to subsequent modules. The first output end of the transformer outputs -15V, the second output end of the transformer outputs +15V, and the third output end of the transformer outputs +5V. Among them, the first output end and the second output end serve as analog power supplies to power the analog devices of the measurement system of the embodiment of the present application, such as the frequency generator, signal processing unit and amplifier, etc., and the third output end serves as a digital power supply to power the digital devices of the measurement system of the embodiment of the present application, such as the main control module, etc. The digital power supply is isolated from the reference ground of the analog power supply, thereby achieving isolation between the analog power supply and the digital power supply.
[0038] It should be noted that: the first output terminal and the second output terminal are connected to the analog device of the measurement system of the embodiment of the present application through a low-noise linear voltage regulator device, and the third output terminal is connected to the digital device of the measurement system of the embodiment of the present application through a low-noise linear voltage regulator device to further reduce noise.
[0039] It can be understood that: the signal acquisition module includes a current acquisition unit and a voltage acquisition unit, the input end of the current acquisition unit is used to access the current signal, the output end of the current acquisition unit is connected to the data processing module, the input end of the voltage acquisition unit is used to access the voltage signal, the output end of the voltage acquisition unit is connected to the data processing module, the current acquisition unit is used to filter and amplify the current signal, and the voltage acquisition unit is used to filter and amplify the voltage signal.
[0040] For example, in some embodiments, reference Figure 1 In this embodiment, the device under test collects the voltage signal and power supply signal of the device under test through the current acquisition unit and the voltage acquisition unit respectively. After the voltage acquisition unit filters and amplifies the voltage signal, the processed voltage signal is transmitted to the data processing module. After the current acquisition unit filters and amplifies the current signal, the processed current signal is transmitted to the data processing module. Through the setting of the current acquisition unit and the voltage acquisition unit, the current signal and voltage signal of the device under test are collected, which facilitates the subsequent calculation of the impedance value of the device under test in the data processing module. At the same time, the filtering and amplification of the current signal and the voltage signal also facilitates reducing noise and enhancing the anti-interference ability of the current signal and the voltage signal.
[0041] It can be understood that the measurement system of the embodiment of the present application also includes a first analog-to-digital converter and a second analog-to-digital converter, the voltage acquisition unit is connected to the data processing module through the first analog-to-digital converter, and the current acquisition unit is connected to the data processing module through the second analog-to-digital converter.
[0042] For example, in some embodiments, reference Figure 1 In this embodiment, the voltage acquisition unit is connected to the data processing module through a first analog-to-digital converter, that is, the voltage signal after filtering and amplification is transmitted to the data processing module through the first analog-to-digital converter, so as to convert the voltage signal after filtering and amplification in an analog signal state into a digital signal state that can be calculated and processed by the data processing module. The current acquisition unit is connected to the data processing module through a second analog-to-digital converter, that is, the current signal after filtering and amplification is transmitted to the data processing module through the second analog-to-digital converter, so as to convert the current signal after filtering and amplification in an analog signal state into a digital signal state that can be calculated and processed by the data processing module.
[0043] It should be noted that: the data processing module also includes an FIR module and an FFT module. After the digital current signal and voltage signal are input into the data processing module, they first pass through the FIR module. The FIR module includes an FIR low-pass filter, and then the harmonics of the high-frequency components in the digital current signal and voltage signal are filtered out to improve the stability of the signal. Then, through the FFT module, that is, the FFT algorithm is used to perform multiple convolutions and orthogonal transformations on the digital current signal and voltage signal that have been filtered out of the high-frequency harmonics, thereby filtering out excess noise and improving the signal-to-noise ratio of the digital current signal and voltage signal, thereby reducing noise and improving the anti-interference ability of the signal. The data processing module also includes a first drive and a second drive. The first drive is used to control the input and output of the first analog-to-digital converter, and the second drive is used to control the input and output of the second analog-to-digital converter.
[0044] It can be understood that the measurement system in the embodiment of the present application further includes a digital-to-analog converter, and the data processing module is connected to the signal generating module via the digital-to-analog converter.
[0045] For example, in some embodiments, reference Figure 1 In this embodiment, the data processing module is connected to the frequency generator through a digital-to-analog converter, so as to convert the digital signal output by the data processing module into an analog signal, which is then accepted by the frequency generator and outputs the corresponding source signal.
[0046] It can be understood that the measurement system of the embodiment of the present application also includes a temperature sensing module, which is connected to the data processing module. The temperature sensing module is used to sense the temperature of the measurement system and transmit the sensed temperature signal to the data processing module.
[0047] For example, in some embodiments, reference Figure 4 In this embodiment, the temperature sensing module includes a temperature sensing chip U66. The data terminal SDA and the clock terminal SCL of the temperature sensing chip U66 are connected to the data processing module through the signal line fTMP_SDA and the signal line fTMP_SCL. The temperature sensing chip U66 senses the real-time temperature of the measurement system of this application and compares it with the normal temperature of 25 degrees recorded in the data processing module. Then, based on the comparison result, the parameters of the signal output by the data processing module to the frequency generator are compensated accordingly, so that the temperature of the measurement system remains stable and avoids excessive stability affecting the normal operation of various components in the measurement system.
[0048] It should be noted that the measurement system of the embodiment of the present application also includes a sampling gear switch module. The device under test is connected to the current acquisition unit through the sampling gear switch module. The sampling gear switch module is also connected to the data processing module. The setting of the sampling gear switch module ensures that the amplitude and bandwidth of the current signal output from the gear switch module match the range and signal-to-noise ratio of the second analog-to-digital converter, thereby reducing noise.
[0049] It can be understood that the ground terminal of the filter is grounded through the arc suppression coil.
[0050] For example, in some embodiments, referring to the figure, in this embodiment, the ground terminal of the filter, that is, the ground terminal located at the first capacitor CY1 and the second capacitor CY2 is grounded through an arc suppression coil to ensure that the measurement system of the embodiment of the present application has no direct electrical connection with the ground, so that when a fault occurs, only a tiny leakage current is used, and no excessive damage is caused to the devices in the measurement system.
[0051] The measuring device according to the embodiment of the second aspect of the application includes the measuring device of the embodiment of the first aspect of the application.
[0052] Since the measuring device includes the measuring system of the first aspect embodiment, the corresponding contents of the measuring system in the first aspect embodiment can be applied to the measuring device of the second aspect, and have the same implementation principles and technical effects. In order to avoid redundant description, it will not be described in detail here.
[0053] The embodiments described in the embodiments of this application are intended to more clearly illustrate the technical solutions of the embodiments of this application and do not constitute a limitation on the technical solutions provided by the embodiments of this application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
[0054] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.
[0055] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, i.e., they may be located in one place or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of this embodiment.
[0056] Those skilled in the art will appreciate that all or some of the steps in the methods, systems, and functional modules / units in the devices disclosed above may be implemented as software, firmware, hardware, or appropriate combinations thereof.
[0057] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0058] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.
[0059] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the above-mentioned units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
[0060] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0061] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.
[0062] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes multiple instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of various embodiments of the present application. The aforementioned storage medium includes: various media that can store programs, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.
[0063] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention should be within the scope of the present invention.
Claims
1. A measurement system, characterized in that: include: A signal acquisition module, the signal acquisition module is used to collect the current signal and voltage signal of the device under test, and amplify and filter the current signal and the voltage signal; a data processing module connected to the signal acquisition module, configured to receive the amplified and filtered current signal and the voltage signal, and calculate the impedance value of the device under test based on the current signal and the voltage signal; a signal generating module, one end of which is connected to the data processing module, and the other end of which is used to connect to the device under test, and the data processing module is further used to control the signal generating module to generate a source signal and output it to the device under test, so that the device under test can output the current signal and the voltage signal; A main control module, the main control module is connected to the data processing module via a communication isolation module, the main control module is used to receive the impedance value output by the data processing module via the communication isolation module; the communication isolation module is used to physically isolate the main control module and the data processing module, and allow high-frequency signals to be transmitted between the main control module and the data processing module.
2. The measurement system according to claim 1, characterized in that It also includes a power supply module, one end of which is connected to an AC power supply, and the other end of which is respectively connected to the signal acquisition module, the data processing module and the signal generation module. The power supply module is used to power the signal acquisition module, the data processing module and the signal generation module.
3. The measurement system according to claim 1, wherein: The communication isolation module includes a USB port isolator, one end of the USB port isolator is connected to the main control module, and the other end of the USB port isolator is connected to the data processing module.
4. The measurement system according to claim 2, characterized in that The power supply module includes a filter, a rectifier bridge and a transformer. The input end of the filter is connected to the AC power supply, the output end of the filter is connected to the input end of the rectifier bridge, the output end of the rectifier bridge is connected to the input end of the transformer, the first output end of the transformer is connected to the signal generating module and the signal acquisition module respectively, the second output end of the transformer is connected to the signal generating module and the signal acquisition module respectively, and the third output end of the transformer is connected to the data processing module. The first output end and the second output end of the transformer are used to power the analog devices of the measurement system, and the third output end of the transformer is used to power the digital devices of the measurement system.
5. The measurement system according to claim 1, wherein: The signal acquisition module includes a current acquisition unit and a voltage acquisition unit. The input end of the current acquisition unit is used to access the current signal, and the output end of the current acquisition unit is connected to the data processing module. The input end of the voltage acquisition unit is used to access the voltage signal, and the output end of the voltage acquisition unit is connected to the data processing module. The current acquisition unit is used to filter and amplify the current signal, and the voltage acquisition unit is used to filter and amplify the voltage signal.
6. The measurement system according to claim 5, characterized in that It also includes a first analog-to-digital converter and a second analog-to-digital converter. The voltage acquisition unit is connected to the data processing module through the first analog-to-digital converter, and the current acquisition unit is connected to the data processing module through the second analog-to-digital converter.
7. The measurement system according to claim 1, characterized in that It also includes a digital-to-analog converter, and the data processing module is connected to the signal generating module via the digital-to-analog converter.
8. The measurement system according to claim 1, wherein: It also includes a temperature sensing module, which is connected to the data processing module. The temperature sensing module is used to sense the temperature of the measurement system and transmit the sensed temperature signal to the data processing module.
9. The measurement system according to claim 4, characterized in that The ground terminal of the filter is grounded through an arc suppression coil.
10. A measuring device, characterized in that include: The measurement system according to any one of claims 1 to 9.