An AC / DC electronic load device with oscillographic measurement and harmonic analysis function

Abstract

The utility model discloses a kind of AC / DC electronic load devices with oscillographic measurement and harmonic analysis function, including current acquisition module, voltage acquisition module, data processing unit, power unit and display screen;Harmonic data analysis module and oscillographic signal processing module are provided in data processing unit, harmonic data analysis module signal transmission is to harmonic display unit, oscillographic signal processing module signal transmission is to oscillographic display unit, the signal of harmonic display unit and oscillographic display unit is all transmitted to display screen.Integrated oscillographic measurement and harmonic analysis function, not only can solve the problem that ordinary electronic load device is inconvenient for user to detect the oscillographic waveform of signal to be measured and external equipment signal detection is easy to interfere, also simplifies test procedure and reduces equipment cost, improves test precision and efficiency.

Description

Technical Field

[0001] This utility model relates to an electronic load device, and more particularly to an AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions. Background Technology

[0002] With the rapid development of power electronics technology, various power supply devices, chargers, and battery management systems are increasingly widely used in industrial production, consumer electronics, communications, transportation, and other fields. In these applications, AC / DC electronic load devices are crucial tools for performance testing and quality inspection. They can simulate different load conditions to test key parameters of power supply devices, such as stability, response characteristics, and efficiency. Typically, AC / DC electronic load devices control parameters such as input current and voltage to perform load testing on power supply devices. By adjusting load modes, such as constant voltage, constant current, constant power, and constant resistance modes, the performance of power supply devices can be comprehensively evaluated. However, with the development of high-frequency switching power supply technology and the increasing complexity of power equipment, testing requirements are no longer limited to basic voltage and current measurements but also include waveform observation and harmonic analysis of signals.

[0003] Currently, some electronic load devices on the market can integrate basic oscilloscope functions. However, these devices generally lack the ability to analyze waveforms and harmonics, especially in high-frequency signal or complex waveform testing. Traditional electronic load devices cannot meet the requirements for high-precision waveform display and harmonic analysis. An additional oscilloscope or harmonic analyzer is usually required, which increases the cost and complexity of the equipment.

[0004] Existing technology and its limitations:

[0005] While traditional AC / DC electronic load devices possess certain testing capabilities, they still suffer from technical limitations, such as limited functionality and waveform display capabilities, when meeting the testing requirements of modern power equipment. The following are the characteristics and main shortcomings of existing technologies:

[0006] Most existing AC / DC electronic load devices can only measure basic electrical parameters such as voltage, current, and power, with only a few high-end devices integrating simple waveform display functions. For complex harmonic component analysis, existing devices often require external equipment (such as oscilloscopes or spectrum analyzers). This forces users to purchase additional oscilloscopes or harmonic analyzers when harmonic analysis is needed, increasing equipment procurement costs, operational complexity, and maintenance costs.

[0007] In addition, while some high-end electronic load devices are equipped with basic waveform display functions, these functions are usually limited to displaying basic voltage or current waveforms, and the display accuracy is limited, failing to meet the needs of high-precision signal analysis. In high-frequency signal analysis or complex waveform analysis, existing waveform display functions are unable to provide detailed signal details, such as voltage and current transient processes.

[0008] It is evident that existing AC / DC electronic load devices have significant shortcomings in meeting the complex testing requirements of modern power electronic equipment, especially in areas such as harmonic analysis and testing efficiency.

[0009] In view of the above, this utility model is hereby proposed. Utility Model Content

[0010] The purpose of this invention is to provide an AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions to solve the above-mentioned technical problems existing in the prior art.

[0011] The objective of this utility model is achieved through the following technical solution:

[0012] The present invention provides an AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions, comprising a current acquisition module, a voltage acquisition module, a data processing unit, a power unit, and a display screen, wherein the current acquisition module, voltage acquisition module, power unit, and display screen are respectively connected to the data processing unit;

[0013] The data processing unit includes a harmonic data analysis module and an oscilloscope signal processing module. The harmonic data analysis module transmits signals to the harmonic display unit, and the oscilloscope signal processing module transmits signals to the oscilloscope display unit. The signals from both the harmonic display unit and the oscilloscope display unit are transmitted to the display screen.

[0014] Compared with the prior art, the AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions provided by this utility model not only solves the problems of ordinary electronic load devices making it inconvenient for users to detect the oscilloscope waveform of the signal under test and the easy interference of external equipment signal detection, but also simplifies the test process, reduces equipment costs, and improves test accuracy and efficiency. Attached Figure Description

[0015] Figure 1 A schematic diagram of the AC / DC electronic load device system architecture with oscilloscope measurement and harmonic analysis functions provided in this embodiment of the present invention. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments, which do not constitute a limitation on the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0017] First, the following explanations are provided for the terms that may be used in this article:

[0018] The terms "comprising," "including," "containing," "having," or other similar semantic descriptions should be interpreted as non-exclusive inclusion. For example, including a technical feature element (such as raw material, component, ingredient, carrier, dosage form, material, size, part, component, mechanism, device, step, process, method, reaction conditions, processing conditions, parameter, algorithm, signal, data, product or article of manufacture, etc.) should be interpreted as including not only the expressly listed technical feature element, but also other technical feature elements that are not expressly listed and are well-known in the art.

[0019] The contents not described in detail in the embodiments of this utility model are existing technologies known to those skilled in the art. Where specific conditions are not specified in the embodiments of this utility model, they shall be performed according to conventional conditions in the art or conditions recommended by the manufacturer. Reagents or instruments used in the embodiments of this utility model whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0020] The present invention provides an AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions, comprising a current acquisition module, a voltage acquisition module, a data processing unit, a power unit, and a display screen, wherein the current acquisition module, voltage acquisition module, power unit, and display screen are respectively connected to the data processing unit;

[0021] The data processing unit includes a harmonic data analysis module and an oscilloscope signal processing module. The harmonic data analysis module transmits signals to the harmonic display unit, and the oscilloscope signal processing module transmits signals to the oscilloscope display unit. The signals from both the harmonic display unit and the oscilloscope display unit are transmitted to the display screen.

[0022] The display screen of the harmonic display unit and the display screen of the oscilloscope display unit are integrated into one unit.

[0023] The voltage sampling module and the current sampling module are used to collect the input voltage and current signals of the device under test in real time. The sampled signals are filtered and then transmitted to the input port of the data processing unit for further processing.

[0024] The data processing unit is responsible for coordinating the work of each functional module. After receiving the sampled voltage and current data, the data processing unit distributes them to the harmonic data analysis module and the oscilloscope signal processing module.

[0025] The harmonic data analysis module is based on the fast Fourier transform algorithm to perform spectrum analysis on the input signal, extract the amplitude and frequency information of each harmonic, calculate the total harmonic distortion rate, and the processed data is transmitted to the harmonic display unit and finally displayed in real time on the display screen.

[0026] After receiving the sampled voltage and current data, the oscilloscope signal processing module converts them into waveform data, processes them in real time, and generates a waveform diagram. The processed waveform data is transmitted to the oscilloscope display unit and finally displayed in real time on the screen.

[0027] The power unit calculates the input power and power factor parameters in real time based on the sampled voltage and current signals transmitted by the data processing unit, and transmits the calculation results to the display unit through the data processing unit for display on the screen.

[0028] The harmonic display unit is responsible for transmitting the analysis results of the harmonic data analysis module and the power unit to the display screen, and displaying the harmonic components, THD values ​​and power data information in numerical and graphical form.

[0029] The harmonic display unit has the functions of switching between %r and %f, as well as switching between voltage and current harmonic analysis. It can also display a harmonic vector diagram interface and filter harmonic measurement data according to the set analysis parameters, highlighting the corresponding non-compliant items in red.

[0030] The oscilloscope display unit is used to transmit the voltage and current waveform images generated by the oscilloscope signal processing module to the display screen, and display the transient waveform changes of the waveform in real time.

[0031] The oscilloscope display unit includes multiple voltage, current, and time scale adjustments to display waveform curves, and also has an automatically adjustable scale for the vertical coordinate axis.

[0032] The display screen serves as a visual interface for the user, displaying various measurement data and analysis results of the device in real time.

[0033] Users can not only view parameters such as voltage and current waveforms, harmonic components, and power information on the display screen, but also modify measurement parameters and trigger display conditions through touch operation due to the touch-interactive functionality of the display screen.

[0034] This device can simultaneously display three-phase voltage and current waveforms, totaling 6 curves. The interface has an automatic adjustment function to fit the vertical coordinate axis scale, so as to observe and record waveform data curves. Real-time data can be recorded to a storage device or locally recorded data can be exported to a storage device for storage.

[0035] This device can connect to external computers or network systems via multiple communication interfaces such as Ethernet, RS232, and CAN. Users can remotely access and control the device to achieve remote data acquisition and remote monitoring.

[0036] In summary, the AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions of this utility model embodiment has higher integration and more comprehensive functions. It can realize load testing, waveform display, and harmonic analysis in a single device, improving testing efficiency, reducing usage costs, and simplifying the operation process. It can meet the needs of modern testing and provide users with a more efficient and convenient testing solution. It integrates multi-functional measurement, waveform analysis, and harmonic analysis modules and is suitable for testing various power electronic equipment.

[0037] To more clearly demonstrate the technical solution and effects provided by this utility model, the following detailed description of the embodiments of this utility model is provided with reference to specific examples.

[0038] The principle of this utility model:

[0039] This AC / DC electronic load device integrates voltage sampling, current sampling, data processing, power, harmonic analysis, oscilloscope signal processing, harmonic display, oscilloscope display, data export, and remote monitoring units. It can achieve accurate measurement, waveform display, and harmonic analysis of input signals, greatly improving testing efficiency and ease of operation.

[0040] The core of this device lies in its data processing unit, which receives voltage and current sampling signals, processes them in real time, and distributes the data to various functional modules. Specifically, the data processing unit comprises two important sub-modules: a harmonic data analysis module and an oscilloscope signal processing module. The harmonic analysis module performs Fast Fourier Transform (FFT) on the signals, extracts harmonic components, and calculates the Total Harmonic Distortion (THD). The oscilloscope signal processing module performs waveform processing on the signals, generating visualized real-time waveform data. The power unit performs power calculations based on the real-time sampling data of voltage and current signals to aid in testing and analysis.

[0041] Example 1

[0042] like Figure 1 As shown:

[0043] This AC / DC electronic load device includes a current acquisition module, a voltage acquisition module, a data processing unit, a power unit, and a display screen. It also includes a harmonic data analysis module, a harmonic display unit, an oscilloscope signal processing module, and an oscilloscope display unit. The data processing unit houses both the harmonic data analysis module and the oscilloscope signal processing module; both signals are transmitted to the display screen for waveform display. The oscilloscope display unit and the harmonic display unit's display screen are integrated. The specific functions of each module are as follows:

[0044] 1. Voltage and current sampling module

[0045] The voltage sampling module and the current sampling module are used to acquire the input voltage and current signals of the device under test in real time, respectively. The sampled signals are filtered and then transmitted to the input port of the data processing unit for further processing.

[0046] 2. Data Processing Unit

[0047] The data processing unit is the core of the entire device, responsible for coordinating the work of various functional modules. It includes a built-in harmonic data analysis module and an oscilloscope signal processing module. First, after receiving the sampled voltage and current data, the data processing unit distributes them to the harmonic data analysis module and the oscilloscope signal processing module.

[0048] The harmonic data analysis module, based on the Fast Fourier Transform (FFT) algorithm, performs spectral analysis on the input signal, extracts the amplitude and frequency information of each harmonic, calculates the total harmonic distortion (THD), and transmits the processed data to the harmonic display unit for display. This module can display the specific values ​​and frequency distribution of each harmonic, helping users understand the harmonic components and distortion in the signal, and is particularly suitable for power quality testing and signal analysis of power electronic equipment.

[0049] Simultaneously, after receiving the sampled voltage and current data, the oscilloscope signal processing module converts them into waveform data, processes them in real time, and generates a waveform graph. This module supports multiple waveform acquisition modes, such as single acquisition, cyclic acquisition, and triggered acquisition, allowing users to adjust parameters such as acquisition frequency and trigger level according to test requirements to obtain high-precision waveforms. The processed waveform data is transmitted to the oscilloscope display unit and finally displayed in real time on the screen.

[0050] 3. Power Unit

[0051] Based on the sampled voltage and current signals transmitted by the data processing unit, the power unit calculates key parameters such as input power and power factor in real time, and transmits the calculation results to the display unit for display on the screen. This display of power data provides users with dynamic feedback information on the load and input power supply, contributing to comprehensive testing and analysis.

[0052] 4. Harmonic display unit and oscilloscope display unit

[0053] The harmonic display unit is responsible for transmitting the analysis results from the harmonic data analysis module and the power unit to the display screen, showing information such as harmonic components, THD values, and power data in numerical and graphical formats. The oscilloscope display unit transmits the voltage and current waveform images generated by the oscilloscope signal processing module to the display screen, displaying the transient waveform changes in real time. Through the coordinated work of the harmonic display unit and the oscilloscope display unit, users can intuitively view test data on the display screen, including harmonic analysis results and real-time waveform curves, thereby quickly determining the signal quality and the operating status of the equipment.

[0054] The harmonic display unit features switching between %r and %f functions, as well as switching between voltage and current harmonic analysis. It can also display a harmonic vector diagram interface. Harmonic measurement data can be filtered based on set analysis parameters (such as THD, THC, POHC, PWHC, etc. for voltage and current), with non-compliant items highlighted in red. The oscilloscope display unit includes various voltage, current, and time scale adjustments for displaying waveform curves, and also features automatic adjustment of the vertical coordinate axis scale.

[0055] 5. Display screen

[0056] The display screen serves as the user's visual interface, showing various measurement data and analysis results of the device in real time. Users can view parameters such as voltage and current waveforms, harmonic components, and power information on the screen; furthermore, thanks to the screen's touch-interactive functionality, they can modify measurement parameters and trigger display conditions via touch, providing a highly convenient operating experience for debugging and testing.

[0057] Data Records

[0058] This device can display up to three-phase voltage and current waveforms simultaneously, totaling six curves. The interface features automatic adjustment to fit the vertical axis scale for easy observation and recording of waveform data. Furthermore, real-time data can be recorded to a storage device (such as a USB flash drive), or locally recorded data can be exported to a storage device (such as a USB flash drive) for storage.

[0059] Remote monitoring

[0060] This device can be connected to external computers or network systems via multiple communication interfaces such as Ethernet, RS232, and CAN. Users can remotely access and control the device to achieve remote data acquisition and remote monitoring.

[0061] This invention integrates voltage and current sampling modules, a data processing unit, harmonic analysis, oscilloscope processing, a power unit, and a display unit to realize a highly efficient AC / DC electronic load device. Users can complete load testing, harmonic analysis, and waveform display on the same device, simplifying the testing process and improving testing accuracy and efficiency.

[0062] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims. The information disclosed in the background section is intended only to enhance the understanding of the overall background technology of this utility model and should not be construed as an admission or implication in any way that such information constitutes prior art known to those skilled in the art.

Claims

1. An AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions, characterized in that, It includes a current acquisition module, a voltage acquisition module, a data processing unit, a power unit, and a display screen, wherein the current acquisition module, voltage acquisition module, power unit, and display screen are respectively connected to the data processing unit; The data processing unit includes a harmonic data analysis module and an oscilloscope signal processing module. The harmonic data analysis module transmits signals to the harmonic display unit, and the oscilloscope signal processing module transmits signals to the oscilloscope display unit. The signals from both the harmonic display unit and the oscilloscope display unit are transmitted to the display screen.

2. The AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions according to claim 1, characterized in that, The display screen of the harmonic display unit and the display screen of the oscilloscope display unit are integrated into one unit.

3. The AC / DC electronic load device with oscilloscope measurement and harmonic analysis functions according to claim 1 or 2, characterized in that, This device connects to an external computer or network system via Ethernet, RS232, or CAN communication interfaces.

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