An apparatus for generating data of a magnetic field exposure test result

Abstract

The utility model discloses a kind of magnetic field exposure test result generation data's device, including electromagnetic field probe, FFT spectrum display oscilloscope and computer, the three or more channels of FFT spectrum display oscilloscope are connected with the D-SUB15 interface of electromagnetic field probe through signal line, for corresponding receiving the voltage signal of X, Y, Z axis of electromagnetic field probe;The computer is connected with FFT spectrum display oscilloscope by USB line, and data processing software is installed on the computer, and the software is used to identify, process the voltage signal output by FFT spectrum display oscilloscope, and generate specific numerical value and picture parameter.The utility model greatly improves the integrity of human body magnetic field exposure test data, helps product developer to carry out more targeted rectification to product in research and development test process, and qualified product is designed by continuous test and improvement, and human health safety is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic compatibility human body magnetic field exposure test signal data visualization output device. Background Technology

[0002] Electromagnetic radiation is recognized as the fourth major public hazard after air pollution, water pollution, and noise pollution. The United Nations Conference on the Human Environment has listed electromagnetic radiation as one of the major pollutants that must be controlled. It is invisible, intangible, and imperceptible, but it poses a significant threat to human health. It can damage molecules such as proteins and DNA, causing harm and potentially inducing cancer.

[0003] Electromagnetic radiation may cause the following harms to the human body: promoting cell carcinogenesis, hormonal imbalances, severe calcium loss, inducing dementia, abnormal pregnancy and childbirth, hypertension, heart disease, electromagnetic hypersensitivity, neurasthenia, memory loss, headaches, vomiting, dizziness, fatigue, and suicidal tendencies. For example, the computers we use at work can affect bodily systems such as the circulatory, immune, reproductive, and metabolic systems, and in severe cases, may even induce cancer and accelerate the proliferation of cancer cells.

[0004] There are generally three methods for assessing electromagnetic field radiation: the exemption method, the electromagnetic field assessment method, and the specific absorption rate method. The Maximum Permissible Exposure to Electromagnetic Fields (MPE) is generally applicable to products with relatively high RF power and located at a certain distance from the human body. Currently, some automakers have set corresponding requirements for MPE. The magnetic field strength in the frequency range of 10Hz to 400kHz must comply with ICNIRP limits, and the assessment measurement results according to ICNIRP 2010 (General Public) must not exceed 80%.

[0005] According to ICNIRP 1998 and ICNIRP 2010 electromagnetic field environment control limits, previously only percentages could be read from the probe display, and specific data could not be displayed. Meanwhile, some car manufacturers have also suggested that the test results should reflect more intuitive information, such as specific numerical values ​​and image parameters. This would not only make the results more convincing but also provide more useful data for later product rectification or upgrades.

[0006] Meanwhile, in existing technologies, general-purpose computers (including standard USB interfaces) and conventional data processing software (such as LabVIEW-based signal analysis modules and Matlab data visualization tools) are mature and well-known technologies. Their functions cover signal recognition, numerical conversion, and image generation, and they do not require special design for magnetic field testing scenarios. Therefore, it is feasible to develop a visualization device for generating data from human magnetic field exposure test results. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned shortcomings of the existing technology by providing a device for generating data on magnetic field exposure test results, thereby providing manufacturers such as car companies with specific and identifiable information on human magnetic field exposure and further improving the environmental performance of their products.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A device for generating data from magnetic field exposure test results includes an electromagnetic field probe, an FFT spectrum display oscilloscope, and a computer. Three or more channels of the FFT spectrum display oscilloscope are connected to the D-SUB15 interface of the electromagnetic field probe via signal lines to receive voltage signals from the X, Y, and Z axes of the electromagnetic field probe. The computer is connected to the FFT spectrum display oscilloscope via a USB cable and has data processing software installed on it. This software is used to identify and process the voltage signals output by the FFT spectrum display oscilloscope and generate specific numerical values ​​and image parameters.

[0009] Furthermore, the electromagnetic field probe is an ELT 400 magnetic field exposure measuring instrument.

[0010] Furthermore, the signal lines connecting the FFT spectrum display oscilloscope to the electromagnetic field probe are shielded, which reduces external electromagnetic interference and ensures the accuracy of X, Y, and Z axis voltage signal transmission. The FFT spectrum display oscilloscope preferably has three channels, which correspond one-to-one with the X, Y, and Z axis signal output terminals of the electromagnetic field probe to avoid signal aliasing.

[0011] The computer is a general desktop or laptop computer with the following hardware configuration: CPU frequency ≥ 2.0GHz, memory ≥ 4GB, at least one USB 2.0 or higher interface, and operating system supporting Windows 10 or higher. The USB connection between the computer and the FFT spectrum display oscilloscope is a standardized plug-and-play connection, requiring no additional hardware interface modification.

[0012] Furthermore, the data processing software can be conventional software based on existing signal recognition, numerical conversion, and visualization technologies (such as LabVIEW basic data processing module, Matlab signal analysis toolbox), without needing to be specially made or customized for this patented device. Software technicians can process the oscilloscope output signal by configuring the software's input interface parameters (matching the output signal format of the FFT spectrum display oscilloscope) and output format parameters (setting the magnetic field strength unit to uT / mT, and the image parameters to spectrum graph / numerical comparison table).

[0013] The beneficial effects of this utility model are: The device for generating data from magnetic field exposure test results provided by this utility model converts the data from the electromagnetic probe into categorizable data signals using a spectrum display oscilloscope. This allows the host computer to recognize and process the data into detailed conventional technical parameters, greatly improving the completeness of human magnetic field exposure test data. During the research and development process, this device helps product developers to make more targeted modifications to the product, and through continuous testing and improvement, design a qualified product.

[0014] This patent connects the "electromagnetic field probe - FFT spectrum display oscilloscope - general-purpose computer" through a standardized interface to form a complete hardware system, which is compatible with existing software to achieve data output, thus solving the problem of functional deficiencies caused by incomplete hardware combinations in existing testing devices.

[0015] At the same time, maintaining a good electromagnetic environment is beneficial to human health. In addition to people having a basic understanding of electromagnetic waves and protective measures, the most fundamental thing is to ensure that the design of various electronic and electrical equipment meets the requirements of relevant national standards. Only when products sold on the market meet electromagnetic compatibility requirements can the electromagnetic environment be fundamentally improved and the impact of a poor electromagnetic environment on human life reduced.

[0016] The technical solution of this utility model will be illustrated below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection relationship of the device for generating data of magnetic field exposure test results provided in this embodiment of the utility model. Detailed Implementation

[0018] The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the disclosed technical solutions. It should also be noted that, for ease of description, the accompanying drawings show only the parts relevant to the technical solutions of this application, not the entire structure.

[0019] Before discussing the exemplary embodiments in more detail, it should be mentioned that the structure of the device components and / or modules mentioned in the embodiments, unless otherwise described in detail, is something that can be understood by those skilled in the art based on existing public technologies or is a commercially available product.

[0020] refer to Figure 1The device for generating data from magnetic field exposure test results provided in this embodiment includes an electromagnetic field probe 1, an FFT spectrum display oscilloscope 2, and a computer. Three or more channels of the FFT spectrum display oscilloscope 2 are connected to the D-SUB15 interface of the electromagnetic field probe 1 via signal lines to receive voltage signals from the X, Y, and Z axes of the electromagnetic field probe 1. The computer is connected to the FFT spectrum display oscilloscope 2 via a USB cable. Data processing software is installed on the computer to identify and process the voltage signals output by the FFT spectrum display oscilloscope 2, and to generate specific numerical values ​​and image parameters.

[0021] The electromagnetic field probe 1 is preferably the ELT 400 magnetic field exposure measuring instrument.

[0022] The FFT spectrum display oscilloscope (2) preferably has three channels, which are respectively connected to the X, Y, and Z axis signal output terminals of the electromagnetic field probe (1).

[0023] The computer is a general-purpose computer (CPU: Intel Core i5-10400F, RAM: 8GB, Hard Drive: 512GB SSD, with 2 USB 3.0 ports), running Windows 10 Professional. The computer is connected to the USB output of the FFT spectrum display oscilloscope 2 via a USB 3.0 cable. After connection, the system automatically recognizes the oscilloscope device, requiring no additional hardware driver installation.

[0024] The data processing software uses conventional software based on existing signal recognition, numerical conversion and visualization technologies, such as LabVIEW basic data processing module and Matlab signal analysis toolbox. It does not need to be specially made or customized for this patented device. Software technicians can process the oscilloscope output signal by configuring the software's input interface parameters (matching the output signal format of the FFT spectrum display oscilloscope) and output format parameters (setting the magnetic field strength unit to uT / mT and the image parameters to spectrum graph / numerical comparison table).

[0025] The testing steps are as follows: (1) The ELT400 is connected to the oscilloscope via D-SUB15, and the oscilloscope is connected to the test computer via USB3.0 cable.

[0026] (2) Set oscilloscope parameters The oscilloscope's time domain is set vertically to each scale, with a default value of 10mV.

[0027] The oscilloscope's frequency domain vertical scale has a default value of 2mV.

[0028] The oscilloscope's time-domain horizontal time base is not lower than the starting frequency period.

[0029] The oscilloscope's time-domain sampling rate should be no less than twice the termination rate.

[0030] The unit for testing signals on an oscilloscope is set to V by default.

[0031] (3) Adjusting ELT400 parameters: Select the 320uT gear and observe the movement of the arrow on the screen.

[0032] Switch to Low to hide the "High" text on the panel; the range is now 32uT.

[0033] The default selection is RMS.

[0034] The default setting is 10Hz.

[0035] The maximum corresponding magnetic field for ELT400 can be set according to the input parameters, supporting 32uT, 320uT, 80mT, and 8mT.

[0036] The maximum output voltage of the ELT 400 is 800mV, which will saturate under overload.

[0037] (4) Start the test: For example, select the limit value of SAIC MEF and scan in 4 segments according to RBW. Set the starting frequency, bandwidth and other parameters for each segment, set the oscilloscope scale, and set the ELT400 parameters to start the test.

[0038] (5) Data processing and output: The FFT spectrum display oscilloscope 2 transmits the acquired X, Y, and Z axis voltage signals to a computer in real time via a USB 3.0 cable. It automatically identifies the voltage signals and performs the following operations: ① Converts 16-bit binary voltage data to decimal voltage values ​​(preserving 3 decimal places); ② Calculates the measured magnetic field strength at each frequency point using the "voltage-magnetic field strength" formula; ③ Generates a spectrum graph (real-time display of magnetic field strength distribution at each frequency point) and a numerical comparison table (filling in the measured values, ICNIRP 2010 limits, and percentages); ④ Supports data storage (Excel format) and image export (PNG format) for direct reading by testers or for product rectification analysis.

Claims

1. A device for generating data from magnetic field exposure test results, characterized in that: The device includes an electromagnetic field probe (1), an FFT spectrum display oscilloscope (2), and a computer. The three or more channels of the FFT spectrum display oscilloscope (2) are connected to the D-SUB15 interface of the electromagnetic field probe (1) via signal lines to receive voltage signals from the X, Y, and Z axes of the electromagnetic field probe (1). The computer is connected to the FFT spectrum display oscilloscope (2) via a USB cable and has data processing software installed on it. This software is used to identify and process the voltage signals output by the FFT spectrum display oscilloscope (2) and generate specific values ​​and image parameters.

2. The apparatus for generating data from magnetic field exposure test results as described in claim 1, characterized in that: The electromagnetic field probe (1) is an ELT 400 magnetic field exposure measuring instrument.

3. The apparatus for generating data from magnetic field exposure test results as described in claim 1, characterized in that: The FFT spectrum display oscilloscope (2) has three channels, which are connected one-to-one with the X, Y, and Z axis signal output terminals of the electromagnetic field probe (1).

4. The apparatus for generating data from magnetic field exposure test results as described in any one of claims 1-3, characterized in that: The data processing software is conventional software based on existing data recognition, conversion and visualization technologies.

5. The apparatus for generating data from magnetic field exposure test results as described in claim 4, characterized in that: The electromagnetic field probe (1) is an ELT 400 magnetic field exposure measuring instrument; the FFT spectrum display oscilloscope (2) has 3 channels, which are respectively connected to the X, Y and Z axis signal output terminals of the electromagnetic field probe (1).

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