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Electromagnetic radiation transmission test apparatus of whole non-fully shielded bullet train

A technology of electromagnetic radiation emission and testing device, applied in the direction of electromagnetic field characteristics, etc., can solve the problem that the actual measurement capability of adaptive antenna needs to be improved, and achieve good suppression effect, reduce the investment of manpower and material resources, and reduce related costs.

Inactive Publication Date: 2018-01-05
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there is still room for improvement in the application capabilities and actual measurement capabilities of adaptive antennas

Method used

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  • Electromagnetic radiation transmission test apparatus of whole non-fully shielded bullet train
  • Electromagnetic radiation transmission test apparatus of whole non-fully shielded bullet train
  • Electromagnetic radiation transmission test apparatus of whole non-fully shielded bullet train

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Embodiment Construction

[0031] In order to explain the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0032] The electromagnetic radiation emission test device of the non-fully shielded motor car of the present invention is as figure 1 As shown, it is divided into two systems: a signal receiving system and a background noise suppression system.

[0033] 1. Background noise suppression system

[0034] Such as figure 2 As shown, the background noise system is used to suppress the interference effect of external background noise on the signal receiving system, and is composed of a shielded box with one side opening, and the opening direction of the shiel...

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Abstract

The invention discloses an electromagnetic radiation transmission test apparatus of a whole non-fully shielded bullet train. The apparatus includes a signal receiving system and a background noise suppression system. The signal receiving system is intended for receiving the radiation signal which is transmitted by a whole bullet train in the operation process and analyzing the radiation signal. The background noise suppression system is intended for suppressing the interference on the signal receiving system by outside background noise. The background noise suppression system is a shielded case body with one side opened. According to the invention, the apparatus can effectively suppress the background noise in the process of the radiation transmission test of the whole bullet train, can better suppress noise resources at different positions of the bullet-train and at different frequencies, and can ensure data accuracy in the test. Also, the apparatus herein can reduce related cost of the test, lowers investment in man power and materials, and increases test efficiency.

Description

Technical field [0001] The invention relates to the technical field of radiation emission testing of a whole motor car. More specifically, it relates to an electromagnetic radiation emission test device for a non-fully shielded motor car. Background technique [0002] The open test field vehicle testing technology is currently China’s main testing method and technology for the radiation emission of motor vehicles. The research results show that in suppressing the background noise problem during the test of the open test field, for the interference signal with higher frequency, the ordinary high gain narrow beam antenna can be used to align the main beam of the antenna at the signal under test, and the direction of the interference signal It can only aim at the side lobe or zero point of the antenna to make the signal-to-noise ratio of the test point reach or exceed 15dB, thus meeting the engineering test requirements. However, for low-frequency interference signals, the gain of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08
Inventor 曹鹤飞闻映红任杰马策一刘宇涵
Owner BEIJING JIAOTONG UNIV
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