A short-distance electromagnetic measurement method and system

An electromagnetic measurement and short-distance technology, which is applied in radio wave measurement systems, measurement devices, radio wave reflection/re-radiation, etc., can solve problems such as inconsistency in height and different target radiation gains, so as to improve accuracy and optimize measurement data Effect

Active Publication Date: 2021-12-07
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the problem that the radiation gain of the target is different due to the height inconsistency in the dynamic circle scanning process of the antenna in the short-range electromagnetic measurement

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  • A short-distance electromagnetic measurement method and system
  • A short-distance electromagnetic measurement method and system
  • A short-distance electromagnetic measurement method and system

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] Such as Figure 3 to Figure 6 As shown, a short-distance electromagnetic measurement method provided by an embodiment of the present invention includes the following steps:

[0041] S1. A height acquisition subsystem is installed on the vehicle to measure the height of the antenna in real time.

[0042] Near-field electromagnetic mea...

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Abstract

The present invention relates to a short-distance electromagnetic measurement method and system. The method includes: setting a height acquisition subsystem for real-time measurement of antenna height; dividing measurement areas in the measurement site, and adjusting The antenna height scans the object vertically in the interval, records the corresponding actual field strength distribution, and obtains the reference height value of the corresponding measurement area; starts the vehicle to perform circular motion of the antenna to scan the target to be measured, obtains radar data, and passes the height The information collected by the acquisition subsystem and the vehicle-mounted GPS establishes the three-dimensional trajectory model of the antenna during the scanning process; combined with the reference height values ​​of each measurement area, the compensation and correction of each collection point of the three-dimensional trajectory model of the antenna and the corresponding radar data are obtained to obtain Corrected target proximity electromagnetic survey data. The invention can compensate the radiation gain of the electromagnetic wave emitted by the antenna in the measurement process in the space where the target is located, and improve the measurement accuracy.

Description

technical field [0001] The invention relates to the technical field of electromagnetic measurement, in particular to a short-range electromagnetic measurement method and system. Background technique [0002] The short-distance electromagnetic measurement system belongs to the vehicle-mounted measurement system. The measurement method is a vehicle-mounted radar measurement system, which performs circular motion of the antenna to scan the target to be measured. The electromagnetic wave is affected by the height of the antenna during measurement, and the radiation gain in the direction vertical to the ground at the target has a cosine distribution, and the vertical variation varies with different frequencies. figure 1 Describes the vertical field strength distribution in the target space, by figure 1 It can be seen that when the height difference is 0.02m at a certain frequency point, the field strength difference reaches 3.12dB. figure 2 Describes the comparison of the targ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/86G01S13/88G01S15/08
CPCG01S13/86G01S13/88G01S15/08
Inventor 候浩浩高超吕鸣张秋梅刘芳
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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