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Close-range electromagnetic measurement method and system

An electromagnetic measurement and short-range technology, which is used in radio wave measurement systems, measurement devices, and radio wave reflection/re-radiation. Effect

Active Publication Date: 2020-06-12
BEIJING INST OF ENVIRONMENTAL FEATURES
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Close-range electromagnetic measurement method and system
  • Close-range electromagnetic measurement method and system
  • Close-range 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 invention relates to a close-range electromagnetic measurement method and system, and the method comprises the steps of setting a height collection subsystem which is used for measuring the heightof an antenna in real time; dividing the measurement areas in a measurement field, scanning a target body in a vertical interval by adjusting the height of an antenna at a starting point of each measurement area, and recording the corresponding actual field intensity distribution to obtain a reference height value of the corresponding measurement area; starting a carrier vehicle to execute the antenna circular motion to scan a to-be-measured target, acquiring the radar data, and establishing an antenna three-dimensional trajectory model in the scanning process through the height collection subsystem and the carrier vehicle GPS acquisition information; and in combination with the reference height value of each measurement area, performing compensation correction on each acquisition point of the antenna three-dimensional trajectory model and the corresponding radar data to obtain the corrected target close-range electromagnetic measurement data. According to the invention, the radiationgain of the electromagnetic wave emitted by the antenna in the space of the target can be compensated in the measurement process, and the measurement accuracy is improved.

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 Applications(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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