Anechoic chamber detection of electrical and electronic products radiation harassment

Electronic , electrical products, radiation problems have been concerned about the consumer, but you know the electronics, electrical products is how to detect radiation it? Weekly Quality Lecture Hall jointly sponsored by the Yangtze Evening Post and Jiangsu Provincial Bureau of Quality Supervision, this issue for your Secret: Electronic and electrical products radiation harassment is detected in the anechoic chamber.

【on site】

Quest anechoic chamber

Electronic, electrical products can not see the radiation, touch, quality control personnel how to detect it? Provincial Quality Inspection Institute of Electrical Products Testing Center Guo Yanping, deputy director of the newspaper opened the answer for the Yangzi Evening News: anechoic chamber with electromagnetic interference receivers and dedicated receiver antenna to test different electronic and electrical products should be tested with the corresponding Auxiliary test equipment. For example, testing a TV radiation harassment, you also need a TV signal generator, to be tested on the TV input standard color bar signal before testing, "qualified products require less test time, and not Qualified products will need longer test time "

Test curve to see the result

After completing the test, the system will automatically display and form a test curve. Yangtze Evening News reporter saw in the test curve, the graph has two color lines, one is the undulating blue line, the other is a relatively straight red line, Guo Yanping said that the red line Corresponds to the standard limit, while the blue line is the product tested the test results. If the blue line segment is always below the red line segment, it means that the product has been tested for radiation harassment items. If the blue line has some frequency points or the entire frequency range exceeds the red line test result, it indicates that the product radiation harassment Project testing failed.

【analysis】

GPS failure rate higher

In everyday use, consumers are always concerned about the radiation problem of electronic and electrical products. However, the radiation can not be seen or touched. Consumers can not pass the senses to judge whether their products are qualified or not. Common electronic, electrical products, radiation test results in the end how? Guo Yanping said that from the past test results, television, set-top box radiation harassment projects a high pass rate, the computer in this project pass rate performance in general, and the most unsatisfactory may need to GPS navigator.

Some enterprises cut corners

Guo Yanping analysis said that radiation harassment items failed, there are many reasons. Some manufacturers lack of understanding of national standards, are not familiar with the electromagnetic compatibility, electromagnetic interference generated by the product does not take any restraint measures; while others are to save costs, deliberately do not install the key components of electromagnetic compatibility; a lot of cars GPS navigation products manufacturing enterprises no design and development capabilities, the direct use of third-party design, resulting in product quality problems; In addition, many manufacturing enterprises lack of testing equipment, the impact of electromagnetic compatibility of key components did not make the appropriate test.

Best choice 3C products

Car GPS radiation harassment unqualified, what harm will happen? Guo Yanping said that if the use of radiation harassment unqualified GPS navigator, will seriously affect the normal use of other automotive electronics products, resulting in a car system failure. In addition, it also interferes with the normal operation of electronic devices such as mobile phones, Bluetooth earphones, pacemakers and other devices carried by motorists or passengers, and also interferes with the gas station's electronic equipment when filling the gas station. It is recommended that consumers buy the best brand and 3C certification of GPS navigation products, the quality will be relatively secure.

Author: Xue Ling


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