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Single-device WiFi indoor height detection method based on phased array principle

A detection method and phased array technology are applied in the field of wireless sensing to achieve the effects of improving angle measurement accuracy, facilitating automatic angle measurement and solving phase ambiguity

Inactive Publication Date: 2021-08-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems in the prior art, the present invention proposes a WiFi indoor height detection method based on the principle of phased array, which is aimed at indoor height detection and does not require advance training.

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  • Single-device WiFi indoor height detection method based on phased array principle
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  • Single-device WiFi indoor height detection method based on phased array principle

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Embodiment Construction

[0045] The present invention will be further explained below in conjunction with specific embodiments and accompanying drawings.

[0046]The purpose of the present invention is to propose a wireless-based unbound height detection system in an indoor environment for the lack of height detection in the existing indoor sensing technology. Figure 1 The process shown in the system does not require a lot of training to establish a database. It only needs to deploy a certain number of antennas in an indoor environment, use the idea of ​​phased array for angle measurement, and then use the multi-frequency method for distance measurement, combining angle and distance information Get up to complete the height test.

[0047] The present invention divides following four steps to complete:

[0048] Step 1) Build the antenna array system

[0049] The system model used for height detection in the present invention is a phased array system composed of antennas, that is, a group of antennas...

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Abstract

The invention discloses a single-device WiFi indoor human body height detection method based on a phased array principle. The single-device WiFi indoor human body height detection method mainly comprises an angle measurement part and a distance measurement part. According to the technical scheme, in the indoor environment, an antenna array is deployed, angle measurement is conducted by means of the idea of a phased array, scanning time is shortened by means of scanning from coarse granularity to fine granularity, angle measurement precision is improved by means of an equal signal method, and the angles of different parts of the body can be obtained through the steps; and then distance measurement is performed on different body parts by using a multi-frequency method, and angle information and distance information are combined to obtain a body trunk heat map, so that the purpose of height detection is achieved.

Description

technical field [0001] The invention belongs to the field of wireless perception, and in particular relates to an unbound WiFi indoor height detection method based on a single device using the principle of a phased array. Background technique [0002] Indoor perception refers to the perception of some information about people in the indoor environment, which can be used in airport halls, exhibition halls, warehouses, supermarkets, libraries, underground parking lots, mines and other environments. Experts and scholars have proposed many indoor perception technology solutions, which are mainly divided into two categories, based on computer vision and based on wireless positioning technology. [0003] When using computer vision for perception, it is necessary to install a camera indoors to identify the location of the target and the characteristics of the target itself through image processing. Although the use of computer vision can achieve high indoor positioning accuracy, b...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/107
CPCA61B5/1072A61B5/0022
Inventor 杨晨马晓宇赵昕禹陈祖豪惠维赵季中
Owner XI AN JIAOTONG UNIV
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