Method for positioning indoor moving persons by aid of WIFI (wireless fidelity) reflected signals

A technology for moving people and reflecting signals, which is applied in the field of indoor moving people positioning, and achieves the effects of simple equipment, convenient and easy-to-use positioning methods, and low cost.

Active Publication Date: 2013-09-18
上海航天空间技术有限公司
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AI Technical Summary

Problems solved by technology

However, several positioning methods in the prior art have some defects. RFID, GPS+inertial navigation and WIFI signal strength positioning all require the monitored person to carry special equipment for positioning, and then send the positioning information to the monitoring equipment to realize mobile monitoring and positioning. Active radar and terahertz imaging require monitoring equipment to actively transmit detection signals and detect targets based on reflected echoes

Method used

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  • Method for positioning indoor moving persons by aid of WIFI (wireless fidelity) reflected signals
  • Method for positioning indoor moving persons by aid of WIFI (wireless fidelity) reflected signals
  • Method for positioning indoor moving persons by aid of WIFI (wireless fidelity) reflected signals

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Embodiment Construction

[0028] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0029] The invention discloses a method for realizing the positioning of indoor mobile personnel by using WIFI reflected signals, and adopts a WIFI emission source and a passive bistatic radar to locate the indoor mobile personnel. like figure 1 Shown, the present invention comprises the following steps:

[0030] Step 1: Set up the WIFI transmitter and the passive bistatic radar separately indoors. Among them, the WIFI transmitting source is used as the non-cooperative irradiation source of the passive bistatic radar, and various commercially available WIFI wireless transmitting devices can be used.

[0031] like figure 2 Shown is a schematic structural diagram of a passive bistatic radar, which includes a CPU and a navigation and positioning module connected to the CPU, a compass, a touch screen, an input de...

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Abstract

The invention discloses a method for positioning indoor moving persons by the aid of WIFI (wireless fidelity) reflected signals. The method is implemented by a WIFI transmission source and a passive bistatic radar device, and the WIFI transmission source is used as a non-cooperative irradiation source of the passive bistatic radar device. The method includes comparing and computing direct WIFI signals transmitted by the WIFI transmission source and the reflected WIFI signals reflected from the bodies of the moving persons to obtain Doppler shift of the reflected WIFI signals; computing moving speeds, directions and distances of the moving persons relative to the passive bistatic radar device so as to relatively position the moving persons; enabling the passive bistatic radar device to acquire satellite positioning information of the passive bistatic radar device via a navigation positioning module and a compass of the passive bistatic radar device, and acquiring satellite positioning information of each tested moving person by means of coordinate transformation. The method has the advantages that the indoor moving persons can be identified, positioned and monitored by the method, and equipment implemented in the method is simple and convenient and is easy to use and low in cost.

Description

technical field [0001] The invention relates to radio communication and passive bistatic radar positioning technology, in particular to a method for realizing indoor mobile personnel positioning by using WIFI reflection signals. Background technique [0002] The current monitoring equipment for indoor detection of personnel movement is mainly active radar, RFID positioning, GPS+inertial navigation, terahertz imaging, and WIFI signal strength detection for indoor detection and positioning. However, several positioning methods in the prior art have some defects. RFID, GPS+inertial navigation and WIFI signal strength positioning all require the monitored person to carry special equipment for positioning, and then send the positioning information to the monitoring equipment to realize mobile monitoring and positioning. Active radar and terahertz imaging require monitoring equipment to actively transmit detection signals and detect targets based on reflected echoes. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/48G01S13/06
Inventor 严鹏史颂华陈宇贤张庆赵冰
Owner 上海航天空间技术有限公司
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