Shielding effectiveness testing device
A testing device and technology for shielding effectiveness, applied in the field of shielding effectiveness testing devices, can solve the problems of not considering impedance matching, poor comparability and repeatability, and achieve the effects of improving accuracy and repeatability, reducing costs, and simplifying test structures
Pending Publication Date: 2022-06-17
苏州信科检测技术有限公司
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Problems solved by technology
However, the shielding effectiveness test device also needs to be equipped with auxiliary structures such as two transition boxes, two adapters, a spectrum network analyzer, EMI measurement antenna standard test software, and data processing software to achieve the test effect, and does not consider the key factors such as impedance matching. Factors, the comparability and repeatability of the measurement results with other methods are relatively poor
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[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show a part of the structure related to the present invention, but not the whole structure.
[0043] In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the connection between the structures of the two elements or the interacti...
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The invention relates to the technical field of cable testing, in particular to a shielding effectiveness testing device. The shielding effectiveness testing device comprises a support assembly, a coupling piece and a network analyzer. Wherein the support assembly is used for bearing a to-be-tested cable, the to-be-tested cable is sleeved with the coupling piece, the output end of the network analyzer is connected with the coupling piece, the output end can output voltage of a first parameter to the coupling piece, the input end of the network analyzer is connected with the to-be-tested cable, and the input end can receive voltage of a second parameter of the to-be-tested cable. And calculating a difference value between the first parameter and the second parameter, wherein the difference value is the shielding effectiveness of the cable. According to the shielding effectiveness testing device, interference outside the to-be-tested cable is formed through the coupling piece, the shielding effectiveness is calculated by testing the signal voltage of the external interference signal received by the to-be-tested cable, and compared with the prior art, the shielding effectiveness testing device is simple in structure and has better measurement result accuracy and repeatability.
Description
technical field [0001] The invention relates to the technical field of cable testing, in particular to a shielding effectiveness testing device. Background technique [0002] With the development of the automotive industry, more and more cables are used in vehicles. In order to suppress electromagnetic interference, many parts and wiring harnesses of automobiles are electromagnetically shielded. The wiring harnesses such as vehicle Ethernet wiring harnesses and high-voltage wiring harnesses are sheathed with shielding layers to form cables. The function of the shielding layer is to shield the electromagnetic interference generated by the automotive electronic components inside the electronic components, to prevent the leakage of electromagnetic interference from interfering with the normal operation of other components, and to meet the requirements of relevant electromagnetic compatibility standards. Shielding effectiveness is the most important technical indicator for shie...
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Login to View More IPC IPC(8): G01R29/08
CPCG01R29/0835G01R29/0871
Inventor 王绎维吴焕王佳硕张琦
Owner 苏州信科检测技术有限公司