Human body infrared positioning apparatus and method facing to wireless sensor network

Abstract

The invention relates to the human body target positioning and tracking field, in particular to a human body infrared detection and positioning device and a method based on a wireless sensor network. The device comprises a CPU, a radio frequency module, a sensor module, an address DIP switch, a serial port and a power supply, wherein, the sensor module comprises three pyroelectric infrared sensors. The method comprises the following steps: the method for re-dividing and coding of the visual fields of a plurality of ordinary Fresnel lenses and the method which is applicable to the cluster head dynamic selection of the wireless sensor network, etc. The device and the method can be widely applied in the indoor human body target positioning and the tracking, such as, the monitoring of whether the lifestyle habits of old solitary people are normal or not, the positioning and the tracking of an invaded target in the security, etc.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks and the field of positioning and tracking of human body targets, in particular to a human body infrared positioning device and method for wireless sensor networks. Background technique [0002] Human body detection and positioning are common key technologies and research hotspots in the fields of intelligent monitoring, advanced human-machine interface, human motion analysis, human behavior understanding, etc., and have extensive application value in disaster relief, security and medical monitoring, etc. . Wireless sensor network is the result of the condensation and development of sensor technology in the direction of miniaturization, networking and universalization. It is a new type of perceptual computing environment with wide coverage, high distribution density, strong fault tolerance and wide adaptability. The extension and expansion of the physical world has had a wide and ...

AI Technical Summary

Problems solved by technology

The disadvantage of the method of calculating the target distance based on the received signal strength is that the consumption of battery power will also cause changes in the signal strength, so the measurement error is large

The disadvantage of the method based on the time difference between the received signal and the transmitted signal is that: due to the relatively fast propagation speed of the electric wave in the air (3*10 8 m / s), as long as there is a small error in the measurement time difference, a large measurement error will be generated

The energy resources of wireless sensor networks are limited and non-renewable, and sensor nodes need to be reasonably scheduled and managed to effectively utilize limited energy resources, which are difficult for the sensor perception mode adopted by the above method.

In other words, the energy constraints inherent in wireless sensor networks cannot support the patterns measured by the above methods

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