An electromagnetic compatibility testing system, method and device

Abstract

The present invention relates to the technical field of electromagnetic compatibility testing, and discloses an electromagnetic compatibility testing system, method and device. Among them, the electromagnetic compatibility testing system includes: an electromagnetic interference simulation unit, a data acquisition unit, an analog-to-digital conversion unit, a signal forwarding unit, a test analysis unit, a result feedback unit, a wireless transmission unit and an information data post-operation unit; wherein: the electromagnetic interference simulation unit: is used to emit different simulated interference electromagnetic signals according to requirements, so as to conduct electromagnetic interference on the operation of the device. Compared with the current electromagnetic compatibility testing methods, when the present invention conducts electromagnetic compatibility testing on a device, only need to place the device in the test chamber, and then after simple settings, the electromagnetic compatibility testing of the device can be completed, which is more simple, convenient and fast, and can meet the growing testing requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic compatibility testing, and more specifically discloses an electromagnetic compatibility testing system, method and device. Background Art

[0002] Electromagnetic compatibility refers to the ability of a device or system to operate in its electromagnetic environment and meet the requirements without causing intolerable electromagnetic interference to any device in its environment. With the rapid development of electronic technology, various electronic devices have become increasingly popular in daily life and industrial applications. However, electronic devices generate electromagnetic radiation during operation, which may cause electromagnetic interference to other devices in the same environment and affect their normal operation. Therefore, electromagnetic compatibility testing has become an important part of evaluating the performance of electronic devices. Currently, when testing the electromagnetic compatibility of a device, electromagnetic compatibility testing is carried out through preset test standards and test methods, such as electrostatic discharge immunity testing, transient pulse interference testing, voltage dip testing, etc. Therefore, the current electromagnetic compatibility testing of devices is relatively complex and the operation is rather cumbersome. With the rapid development of the electronic device industry, it cannot meet the growing testing needs. Summary of the Invention

[0003] The present invention mainly provides an electromagnetic compatibility testing system, method and device, which can solve the problem that the current electromagnetic compatibility testing method is relatively complex in operation and cannot meet the growing testing needs.

[0004] To solve the above technical problems, according to one aspect of the present invention, more specifically, an electromagnetic compatibility testing system includes: an electromagnetic interference simulation unit, a data acquisition unit, an analog-to-digital conversion unit, a signal forwarding unit, a test analysis unit, a result feedback unit, a wireless transmission unit, and an information data post-operation unit; wherein:

[0005] The electromagnetic interference simulation unit: is used to emit different simulated interference electromagnetic signals according to requirements, so as to perform electromagnetic interference on the operation of the device;

[0006] The data acquisition unit: is used to collect the electromagnetic radiation intensity generated during the normal operation of the device and the working current information data during the working process;

[0007] The analog-to-digital conversion module: is used to perform analog-to-digital conversion on the information data collected by the data acquisition unit, so as to convert the information data collected by the data acquisition unit into a data type that can be processed and analyzed by the test analysis unit;

[0008] The signal forwarding module: is used to forward the information data converted by the analog-to-digital conversion module to the test analysis unit;

[0009] Test analysis unit: It is used to receive the information data forwarded by the signal forwarding module, analyze the received information data, and thus obtain the electromagnetic compatibility result of the device;

[0010] Result feedback unit: It is used to feedback the electromagnetic compatibility result information of the device obtained by the test analysis unit;

[0011] Wireless transmission unit: It is used to send the result information feedback by the result feedback unit to the remote management terminal device, so that the tester can receive and view the test results remotely;

[0012] Post-operation unit for information data: It is used to perform post-processing operations on the result information feedback by the result feedback unit as needed.

[0013] Furthermore, the data acquisition unit consists of an electromagnetic radiation intensity acquisition module and a device working current acquisition module; the electromagnetic radiation intensity acquisition module is used to acquire the electromagnetic radiation intensity information data generated by the device to the external environment during normal operation; the device working current acquisition module is used to acquire the working current information data of the device during the working process.

[0014] Furthermore, the test analysis unit includes: an information data cache module, an electromagnetic compatibility analysis module, and a result integration and distribution module;

[0015] Information data cache module: It is used to cache the information data forwarded by the signal forwarding unit to the test analysis unit;

[0016] Electromagnetic compatibility analysis module: It is used to process and analyze the information data cached in the information data cache module, and thus obtain the electromagnetic compatibility result information of the device;

[0017] Result integration and distribution module: It is used to integrate the electromagnetic compatibility result information of the device obtained by the electromagnetic compatibility analysis module, and then distribute the integrated electromagnetic compatibility result information to the result feedback unit.

[0018] Furthermore, when the electromagnetic compatibility analysis module tests and analyzes the electromagnetic compatibility result of the device, it first processes the electromagnetic radiation intensity information data generated by the device to the outside collected by the electromagnetic radiation intensity acquisition module during a period of normal operation of the device, so as to obtain the frequency of the electromagnetic radiation generated by the device to the external environment during normal operation as:

[0019]

[0020] where f is the frequency of the electromagnetic radiation generated by the device to the external environment during normal operation, is the electromagnetic radiation intensity generated by the device to the outside per second t within a period A of normal operation of the device, , are respectively the maximum and minimum electromagnetic radiation intensities generated by the device to the outside world during a period A of normal operation of the device. h = 6.626×10 -34 J·s is the Planck constant; at the same time, it can be obtained that during the normal operation of the device, the propagation distance of the electromagnetic radiation generated by the device to the external environment is:

[0021]

[0022] where d is the propagation distance of the electromagnetic radiation generated by the device to the external environment during the normal operation of the device, C is the speed of light, is the attenuation coefficient of the electromagnetic radiation in the air; finally, it can be obtained that the device will generate electromagnetic radiation with a frequency of f and a propagation distance of d during the normal operation process.

[0023] Furthermore, when the electromagnetic compatibility analysis module tests and analyzes the electromagnetic compatibility result of the device, it also includes: at a specific distance, continuously interfering with the device with simulated electromagnetic interference of different frequencies. At this time, the device operating current collected by the device operating current acquisition module is processed and analyzed. If:

[0024]

[0025] then it is determined that at a specific distance, the simulated electromagnetic interference of the current frequency will not affect the normal operation of the device; where, is the fluctuating current value generated per second i of the device during the continuous interference time T under the electromagnetic interference of the current frequency , I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for the normal operation of the device;

[0026] At a specific simulated electromagnetic interference frequency, the simulated electromagnetic interference source is adjusted to different distances from the device to continuously interfere with the device. At this time, the device operating current collected by the device operating current acquisition module is processed and analyzed. If:

[0027]

[0028] then it is determined that at a specific frequency, the simulated electromagnetic interference at the current distance will not affect the normal operation of the device; where, is the fluctuating current value generated per second i of the device during the continuous interference time T at the current distance l, I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for the normal operation of the device;

[0029] Finally, it can be obtained within what distance range the device can tolerate electromagnetic interference of what frequency.

[0030] Further, the post-operation unit of the information data is composed of a storage module, a display module, a retrieval module, and a deletion module; the storage module is used to store the information data fed back by the result feedback unit; the display module is used to display the information data fed back by the result feedback unit in front of the tester; the retrieval module is used to retrieve, view, and operate on the information data stored in the storage module; the deletion module is used to delete the information data stored in the storage module.

[0031] According to another aspect of the present invention, there is provided an electromagnetic compatibility testing method, including the following steps:

[0032] S1. Power on the device to be tested so that the device to be tested can work normally.

[0033] S2. Collect the electromagnetic radiation intensity information data generated by the device to the external environment during a period of normal operation.

[0034] S3. Convert the electromagnetic radiation intensity information data generated by the device to the external environment during a period of normal operation, and then process and analyze it, so as to obtain the electromagnetic radiation frequency and the propagation distance of the electromagnetic radiation generated by the device to the external environment during the normal operation process.

[0035] S4. Adjust the simulated electromagnetic interference source to a specific position relative to the device, then simulate electromagnetic interference of different frequencies to continuously interfere with the device, and collect the working current of the device in real time. After processing and analyzing the collected working current, compare it with the current fluctuation threshold allowed for the normal operation of the device.

[0036] S5. Adjust the simulated electromagnetic interference source to different positions relative to the device, then simulate electromagnetic interference of the same frequency to continuously interfere with the device, and collect the working current of the device in real time. After processing and analyzing the collected working current, compare it with the current fluctuation threshold allowed for the normal operation of the device.

[0037] S6. Finally, obtain the distance range within which the device can tolerate electromagnetic interference of a certain frequency.

[0038] The present invention also provides an electromagnetic compatibility testing device, including a test chamber, a power supply module, an electromagnetic radiation sensor, an electromagnetic interference simulation module, a distance adjustment module, a data acquisition module, a core analysis module, and a display operation screen;

[0039] Test chamber: used to place the device to be tested in the chamber for electromagnetic compatibility testing;

[0040] Power supply module: used to supply power to the electromagnetic compatibility testing device and the device to be tested placed in the test chamber;

[0041] Electromagnetic radiation sensor: used to sense the intensity of electromagnetic radiation generated by the device to the outside world during normal operation;

[0042] Electromagnetic interference simulation module: used to emit different simulated interference electromagnetic signals according to requirements to conduct electromagnetic interference on the operation of the device;

[0043] Distance adjustment module: used to adjust the distance between the electromagnetic interference simulation module and the device;

[0044] Data acquisition module: used to acquire the electromagnetic radiation intensity information data generated by the device to the outside world during normal operation and the working current information data of the device during electromagnetic interference on the device;

[0045] Core analysis module: used to analyze the data acquired by the data acquisition module to obtain the electromagnetic compatibility result of the device (with the MCU as the core);

[0046] Display operation screen: used to display information data and for human-computer interaction at the same time.

[0047] The beneficial effects of an electromagnetic compatibility test system, method, and device of the present invention are as follows: When conducting electromagnetic compatibility tests on a device, only need to place the device to be tested in the test chamber, and then through the internally arranged electromagnetic radiation intensity acquisition module and data acquisition module, the electromagnetic radiation intensity information data generated by the device to the outside world during normal operation can be acquired. Then, through internal automatic analysis and processing, the frequency and influence range of the electromagnetic radiation generated by the device to the outside world during normal operation can be obtained and displayed in front of the tester for the tester to view. Moreover, different frequencies of electromagnetic interference can be simulated at a specific distance and the distance between the interference source and the device can be adjusted under the simulated electromagnetic interference of a specific frequency, so as to obtain the distance range within which the device can withstand electromagnetic interference of a certain frequency and display the result or send it to the tester's terminal. Compared with the current electromagnetic compatibility test methods, when conducting electromagnetic compatibility tests on a device using the present invention, only need to place the device in the test chamber and then complete the electromagnetic compatibility test of the device after simple settings, which is more simple, convenient, and fast, and can meet the growing test requirements. Brief Description of the Drawings

[0048] The following further elaborates on the present invention in detail in conjunction with the drawings and specific implementation methods.

[0049] Figure 1 It is a schematic diagram of the principle of the electromagnetic compatibility test system;

[0050] Figure 2 It is a schematic diagram of the process of the electromagnetic compatibility test method. Detailed implementation mode

[0051] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0052] As Figure 1-2 shown, an electromagnetic compatibility test system, method and device, the electromagnetic compatibility test system is built in the electromagnetic compatibility test device. The device to be tested is placed in the test chamber of the device, and the device and the device to be tested placed in the test chamber are powered on through the power supply module, so that the device and the device to be tested can work normally.

[0053] During the normal operation of the device to be tested, the electromagnetic radiation sensor arranged in the test chamber will sense the electromagnetic radiation generated by the device to the outside during normal operation. At the same time, the electromagnetic radiation intensity acquisition module in the data acquisition module (data acquisition unit) will collect the electromagnetic radiation intensity information data generated by the device to the outside during normal operation in real time, and convert it into information data that can be analyzed and processed by the analysis test unit in the core analysis module of the device through the analog-to-digital conversion unit. Then, the converted information data is forwarded to the information data cache module in the analysis test unit through the signal forwarding module for caching. Then, the electromagnetic compatibility analysis module in the analysis test unit will retrieve the electromagnetic radiation intensity information data collected by the electromagnetic radiation intensity acquisition module during a period of normal operation of the device from the information data cache module for processing, so as to obtain the frequency of the electromagnetic radiation generated by the device to the outside environment during normal operation as:

[0054]

[0055] where f is the frequency of the electromagnetic radiation generated by the device to the outside environment during normal operation, is the electromagnetic radiation intensity generated by the device to the outside per second t within a period A of normal operation of the device, 、 are respectively the maximum and minimum electromagnetic radiation intensities generated by the device to the outside within a period A of normal operation of the device, h = 6.626×10 -34 J·s is the Planck constant; at the same time, it can be obtained that during the normal operation of the device, the propagation distance of the electromagnetic radiation generated by the device to the outside environment is:

[0056]

[0057] where d is the propagation distance of the electromagnetic radiation generated by the device to the outside environment during normal operation of the device, C is the speed of light, is the attenuation coefficient of electromagnetic radiation in air; finally, it can be obtained that the device will generate electromagnetic radiation with a frequency of f and a propagation distance of d during normal operation. The above results are sent to the result feedback unit through the result integration and distribution module in the analysis and test unit. The result feedback unit sends the results to the tester through two paths. One is to directly display the results on the display operation screen of the device, and the other is to transmit them to the remote terminal device for display through the wireless transmission module using Internet technology. Avoid using devices with the same operating frequency as the device under test and the electromagnetic interference frequency generated by the device under test within the range where electromagnetic interference can be generated during the subsequent use of the device under test.

[0058] Moreover, during the test of the device under test, the electromagnetic interference simulation module (electromagnetic interference simulation unit) can also be adjusted to a position at a certain distance from the device through the distance adjustment module in the device, and then different frequencies of electromagnetic interference are simulated to continuously interfere with the device. At this time, the device operating current collected by the device operating current collection module in the data collection module is processed and analyzed. If:

[0059]

[0060] it is determined that at a specific distance, the simulated electromagnetic interference at the current frequency will not affect the normal operation of the device; where, is the value of the fluctuating current generated per second i by the device within the continuous interference time T under the electromagnetic interference at the current frequency , I is the average current value during the normal operation of the device, and Y is the current fluctuation threshold allowed for the normal operation of the device;

[0061] In addition, the electromagnetic interference simulation module can be made to generate electromagnetic interference of a specific frequency, and then the electromagnetic interference simulation module is adjusted to different distances from the device through the distance adjustment module to continuously interfere with the device. At this time, the device operating current collected by the device operating current collection module is processed and analyzed. If:

[0062]

[0063] it is determined that at a specific frequency, the simulated electromagnetic interference at the current distance will not affect the normal operation of the device; where, is the value of the fluctuating current generated per second i by the device within the continuous interference time T at the current distance l. Finally, it can be obtained within what distance range the device can tolerate electromagnetic interference of what frequency. And the results are fed back to the tester through the result feedback module in the same way as above.

[0064] The above test results can also be stored through the storage module in the information data post-operation unit, facilitating subsequent retrieval, viewing, and other operations through the retrieval module. At the same time, the stored test result data can also be deleted through the deletion module.

[0065] All electrical components mentioned in this article are electrical components that exist in reality.

[0066] Certainly, the above description is not a limitation on the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention also fall within the protection scope of the present invention.

Claims

1. An electromagnetic compatibility testing method, characterized in that: The following steps are involved: S1. Power on the device to be tested so that the device to be tested works normally; S2. Collecting electromagnetic radiation intensity information data generated by the equipment to the external environment during a period of normal operation; S3, converting the electromagnetic radiation intensity information data generated by the device to the external environment during a period of normal operation, and then processing and analyzing it, so as to obtain the electromagnetic radiation frequency and the propagation distance of the electromagnetic radiation generated by the device to the external environment during normal operation; S4, adjusting the simulated electromagnetic interference source to a specific position away from the device, then simulating electromagnetic interference of different frequencies to continuously interfere with the device, and collecting the working current of the device in real time, and processing and analyzing the collected working current and comparing it with the current fluctuation threshold allowed for normal operation of the device; S5. Adjust the simulated electromagnetic interference source to different positions from the device, and then simulate the electromagnetic interference of the same frequency to continuously interfere with the device, collect the working current of the device in real time, and process and analyze the collected working current and compare it with the current fluctuation threshold allowed for normal operation of the device; S6. Finally, the electromagnetic interference tolerance of the equipment is obtained; The above method is implemented by a system including an electromagnetic interference simulation unit, a data acquisition unit, an analog-to-digital conversion unit, a signal forwarding unit, a test analysis unit, a result feedback unit, a wireless transmission unit, and an information data post-operation unit; wherein: Electromagnetic interference simulation unit: used to send out different simulated interference electromagnetic signals according to needs, so as to cause electromagnetic interference to the operation of the equipment; Data acquisition unit: used to collect electromagnetic radiation intensity generated by the equipment during normal operation and working current information data during the working process; Analog-to-digital conversion module: used to perform analog-to-digital conversion on the information data collected by the data acquisition unit, thereby converting the information data collected by the data acquisition unit into a data type that can be processed and analyzed by the test analysis unit; Signal forwarding module: used to forward the information data converted by the analog-to-digital conversion module to the test analysis unit; Test and analysis unit: used to receive the information data forwarded by the signal forwarding module and analyze the received information data to obtain the electromagnetic compatibility results of the equipment; Result feedback unit: used to feedback the electromagnetic compatibility result information of the equipment obtained by the test analysis unit; Wireless transmission unit: used to send the result information fed back by the result feedback unit to the remote management terminal device, so that the test personnel can receive and view the test results remotely; Information data post-operation unit: used to perform post-processing operations on the result information fed back by the result feedback unit as needed.

2. The electromagnetic compatibility testing method according to claim 1, characterized in that: The data acquisition unit is composed of an electromagnetic radiation intensity acquisition module and an equipment working current acquisition module; the electromagnetic radiation intensity acquisition module is used to collect electromagnetic radiation intensity information data generated by the equipment to the external environment during normal operation; The equipment working current acquisition module is used to collect the working current information data of the equipment during the working process.

3. The electromagnetic compatibility testing method according to claim 1, characterized in that: The test analysis unit includes: an information data cache module, an electromagnetic compatibility analysis module and a result integration and delivery module; Information data cache module: used to cache the information data forwarded by the signal forwarding unit to the test analysis unit; Electromagnetic compatibility analysis module: used to process and analyze the information data cached in the information data cache module, so as to obtain the electromagnetic compatibility result information of the equipment; Result integration and delivery module: used to integrate the equipment electromagnetic compatibility result information obtained by the electromagnetic compatibility analysis module, and then deliver the integrated electromagnetic compatibility result information to the result feedback unit.

4. The electromagnetic compatibility testing method according to claim 3, characterized in that: When the electromagnetic compatibility analysis module tests and analyzes the electromagnetic compatibility results of the device, it first processes the electromagnetic radiation intensity information data generated by the device during normal operation of the device within a period of time, which is collected by the electromagnetic radiation intensity collection module, so as to obtain the frequency of the electromagnetic radiation generated by the device to the external environment during normal operation: Where f is the frequency of electromagnetic radiation generated by the device to the external environment during normal operation, E t E is the electromagnetic radiation intensity generated by the equipment to the outside world per second t within a period of time A when the equipment is working normally. max 、E min They are the maximum and minimum electromagnetic radiation intensities generated by the equipment to the outside world within a period of time A when the equipment is working normally, h = 6.626 × 10 -34 J·s is Planck's constant. At the same time, it can be obtained that the propagation distance of the electromagnetic radiation generated by the device to the external environment during normal operation is: Where d is the propagation distance of electromagnetic radiation generated by the device to the external environment during normal operation, C is the speed of light, and α = 10 -2 cm -1 is the attenuation coefficient of electromagnetic radiation in the air, which is the average value of the electromagnetic radiation attenuation coefficient under the air humidity range of 40%-60%. Finally, it can be obtained that the device will generate electromagnetic radiation with a frequency of f and a propagation distance of d during normal operation.

5. The electromagnetic compatibility testing method according to claim 3, characterized in that: When the electromagnetic compatibility analysis module tests and analyzes the electromagnetic compatibility results of the device, it also includes: at a specific distance, using simulated electromagnetic interference of different frequencies to continuously interfere with the device, and at this time, processing and analyzing the device working current collected by the device working current collection module, if: It is determined that at a specific distance, the simulated electromagnetic interference of the current frequency will not affect the normal operation of the device; where I γ,i is the fluctuating current value generated by the device per second i during the continuous interference time T under the electromagnetic interference of the current frequency γ, I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for the normal operation of the device; At a specific simulated electromagnetic interference frequency, adjust the simulated electromagnetic interference source to different distances from the device to continuously interfere with the device. At this time, the device working current collected by the device working current collection module is processed and analyzed. If: It is determined that at a specific frequency, the simulated electromagnetic interference at the current distance will not affect the normal operation of the device; where I l,i is the fluctuating current value generated by the device per second i during the continuous interference time T at the current distance l; Ultimately, we can determine how much distance and frequency the device can tolerate in order to achieve electromagnetic interference tolerance.

6. The electromagnetic compatibility testing method according to claim 1, characterized in that: The information data post-operation unit is composed of a storage module, a display module, a retrieval module and a deletion module; the storage module is used to store the information data fed back by the result feedback unit; A display module is used to display the information data fed back by the result feedback unit to the tester; The retrieval module is used to retrieve, view and operate the information data stored in the storage module; the deletion module is used to delete the information data stored in the storage module.

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