Electromagnetic compatibility test system, method and device

Abstract

The invention relates to the technical field of electromagnetic compatibility testing, and discloses an electromagnetic compatibility testing system, an electromagnetic compatibility testing method and an electromagnetic compatibility testing device. Comprising 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 for sending out different simulation interference electromagnetic signals according to requirements so as to carry out electromagnetic interference on the work of equipment. Compared with an existing electromagnetic compatibility test method, when the electromagnetic compatibility of the equipment is tested, the electromagnetic compatibility test of the equipment can be completed only by placing the equipment in the test chamber and then carrying out simple setting, the method is simpler, more convenient and faster, and the increasing test requirements can be met.

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 accordance with requirements in its electromagnetic environment and not cause intolerable electromagnetic interference to any device in its environment. With the rapid development of electronic technology, various electronic devices are becoming 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 equipment. At present, when testing the electromagnetic compatibility of equipment, electromagnetic compatibility testing is carried out through pre-set test standards and test methods, such as electrostatic discharge resistance test, transient pulse interference test, voltage drop test, etc. Therefore, the current electromagnetic compatibility test of equipment is relatively complex and the operation is relatively cumbersome. With the rapid development of the electronic equipment industry, it cannot meet the growing testing needs. Summary of the invention

[0003] The present invention mainly provides an electromagnetic compatibility test system, method and device, which can solve the problem that the current electromagnetic compatibility test method is relatively complicated to operate and cannot meet the growing test needs.

[0004] To solve the above technical problems, according to one aspect of the present invention, more specifically, an electromagnetic compatibility test 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: 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 operation 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.

[0005] Furthermore, 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 the 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 operation.

[0006] Furthermore, 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.

[0007] Furthermore, 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 over a period of time, which is collected by the electromagnetic radiation intensity collection module, so that the frequency of the electromagnetic radiation generated by the device to the external environment during normal operation can be obtained as follows:

[0008] Where f is the frequency of electromagnetic radiation generated by the device to the external environment during normal operation. It is the electromagnetic radiation intensity generated to the outside world per second t within a period of time A when the equipment is working normally. , 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:

[0009] 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, is the attenuation coefficient of electromagnetic radiation in the air; ultimately, 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.

[0010] Furthermore, when the electromagnetic compatibility analysis module tests and analyzes the electromagnetic compatibility results of the device, it also includes: at a specific distance, continuously interfering with the device with simulated electromagnetic interference of different frequencies, and processing and analyzing the device working current collected by the device working current collection module at this time, if:

[0011] 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; among them, At the current frequency The fluctuating current value generated by the device per second i during the continuous interference time T under electromagnetic interference, I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for 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:

[0012] 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; is the fluctuating current value generated by the device per second i 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 normal operation of the device; Ultimately, we can determine how much distance and frequency the device can tolerate in order to achieve electromagnetic interference tolerance.

[0013] Furthermore, 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; the 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.

[0014] According to another aspect of the present invention, there is provided an electromagnetic compatibility testing method, comprising the following steps: 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, we can determine the distance range and frequency of electromagnetic interference that the device can tolerate.

[0015] The present invention also provides an electromagnetic compatibility test device, comprising a test chamber, a power 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; Test chamber: used to place the device to be tested in the chamber for electromagnetic compatibility testing; Power supply module: used to supply power to the electromagnetic compatibility test device and the equipment to be tested placed in the test chamber; Electromagnetic radiation sensor: used to sense the intensity of electromagnetic radiation generated to the outside world during the normal operation of the equipment; Electromagnetic interference simulation module: used to send out different simulated interference electromagnetic signals according to needs to interfere with the operation of the equipment; Distance adjustment module: used to adjust the distance between the electromagnetic interference simulation module and the device; Data acquisition module: used to collect the information data of the electromagnetic radiation intensity generated by the equipment to the outside world during normal operation, and the information data of the working current of the equipment when electromagnetic interference is applied to the equipment; Core analysis module: used to analyze the data collected by the data acquisition module to obtain the electromagnetic compatibility results of the equipment (with MCU as the core); Display operation screen: used to display information data and for human-computer interaction.

[0016] The beneficial effects of an electromagnetic compatibility test system, method and device of the present invention are as follows: when performing electromagnetic compatibility test on a device, it is only necessary to place the device to be tested in a test chamber, and then the electromagnetic radiation intensity information data generated by the device to the outside world during normal operation can be collected through the electromagnetic radiation intensity acquisition module and the data acquisition module arranged inside, and then the frequency and the range of influence of the electromagnetic radiation generated by the device to the outside world during normal operation can be obtained through internal automatic analysis and processing, and displayed in front of the tester for the tester to view. In addition, electromagnetic interference of different frequencies 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 that the device can tolerate electromagnetic interference of a certain frequency within a certain distance range, and the result can be displayed or sent to the tester terminal. Compared with the current electromagnetic compatibility test method, when testing the electromagnetic compatibility of the device, the present invention only needs to place the device in the test chamber, and then after simple settings, the electromagnetic compatibility test of the device can be completed, which is simpler, more convenient and faster, and can meet the growing testing needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0018] Figure 1 This is the principle diagram of the electromagnetic compatibility test system; Figure 2 This is a flow chart of the electromagnetic compatibility test method. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0020] like Figure 1-2 As shown, an electromagnetic compatibility test system, method and device are provided, wherein the electromagnetic compatibility test system is built into an 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 by a power module, so that the device and the device to be tested work normally.

[0021] 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 world 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 world during normal operation in real time, and convert it through the analog-to-digital conversion unit to the analysis and testing unit in the core analysis module of the device for analysis and processing. The converted information data is then forwarded to the information data cache module in the analysis and testing unit through the signal forwarding module for caching. Then the electromagnetic compatibility analysis module in the analysis and testing unit will retrieve the electromagnetic radiation intensity information data generated by the device during the normal operation of the device for a period of time from the information data cache module for processing, so that the frequency of the electromagnetic radiation generated by the device to the external environment during normal operation can be obtained as follows:

[0022] Where f is the frequency of electromagnetic radiation generated by the device to the external environment during normal operation. It is the electromagnetic radiation intensity generated to the outside world per second t within a period of time A when the equipment is working normally. , 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:

[0023] 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, is the attenuation coefficient of electromagnetic radiation in the air; ultimately, 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 testing 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 the device with the same operating frequency and the electromagnetic interference frequency generated by the device to be tested within the range that can generate electromagnetic interference during the subsequent use of the device to be tested.

[0024] In addition, during the test of the device to be tested, the electromagnetic interference simulation module (electromagnetic interference simulation unit) can be adjusted to a position at a certain distance from the device through the distance adjustment module in the device, and then electromagnetic interference of different frequencies can be simulated to continuously interfere with the device. At this time, the device working current collected by the device working current collection module in the data collection module is processed and analyzed. If:

[0025] 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; among them, At the current frequency The fluctuating current value generated by the device per second i during the continuous interference time T under electromagnetic interference, I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for normal operation of the device; In addition, the electromagnetic interference simulation module can also generate electromagnetic interference of a specific frequency, and then the electromagnetic interference simulation module can be adjusted to different distances from the device through the distance adjustment module 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:

[0026] 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; is the fluctuating current value generated by the device per second i during the continuous interference time T at the current distance l. Finally, it can be obtained that the device can tolerate electromagnetic interference of a certain frequency within a certain distance range. And the result is fed back to the tester through the result feedback module as above.

[0027] The above test results can also be stored through the storage module in the information data post-operation unit, so as to facilitate subsequent retrieval and 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.

[0028] The electrical components that appear in this article are all electrical components that exist in reality.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. An electromagnetic compatibility test system, characterized in that: include: Electromagnetic interference simulation unit, data acquisition unit, analog-to-digital conversion unit, signal forwarding unit, test analysis unit, result feedback unit, wireless transmission unit and 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 test system 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 test system 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 test system 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. It is the electromagnetic radiation intensity generated to the outside world per second t within a period of time A when the equipment is working normally. , 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, is the attenuation coefficient of electromagnetic radiation in the air; ultimately, 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 test system 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; among them, At the current frequency The fluctuating current value generated by the device per second i during the continuous interference time T under electromagnetic interference, I is the average current value of the device under normal operation, and Y is the current fluctuation threshold allowed for 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; 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 test system 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.

7. 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, we can determine the distance range and frequency of electromagnetic interference that the device can tolerate.

8. An electromagnetic compatibility testing device, characterized in that: It includes a test chamber, a power 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; Test chamber: used to place the device to be tested in the chamber for electromagnetic compatibility testing; Power supply module: used to supply power to the electromagnetic compatibility test device and the equipment to be tested placed in the test chamber; Electromagnetic radiation sensor: used to sense the intensity of electromagnetic radiation generated to the outside world during the normal operation of the equipment; Electromagnetic interference simulation module: used to send out different simulated interference electromagnetic signals according to needs to interfere with the operation of the equipment; Distance adjustment module: used to adjust the distance between the electromagnetic interference simulation module and the device; Data acquisition module: used to collect the information data of the electromagnetic radiation intensity generated by the equipment to the outside world during normal operation, and the information data of the working current of the equipment when electromagnetic interference is applied to the equipment; Core analysis module: used to analyze the data collected by the data acquisition module to obtain the electromagnetic compatibility results of the equipment; Display operation screen: used to display information data and for human-computer interaction.

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