Wireless and ultrasonic composite location system and location method for wireless and ultrasonic composite location system

Abstract

The invention provides a wireless and ultrasonic composite location system and a location method for the wireless and ultrasonic composite location system, wherein the wireless and ultrasonic composite location system comprises a plurality of beacon modules with fixed positions, at least one mobile location module and an electronic location platform; each of the beacon modules comprises a first wireless receiving and sending module, an ultrasonic transmitting module and a first intelligent processing module; the mobile location module is arranged on a mobile object, and comprises a second wireless receiving and sending module, an ultrasonic receiving array, an array processing module and a central processer; the electronic location platform is used for building an electronic map and sending the electronic map to the mobile location module, and is also used for coordinating the synchronization of the beacon modules and the mobile location module. The invention also comprises the location method for the wireless and ultrasonic composite location system. By adopting the system and the method, the problems of multipath effect and none-line-of-sight are solved, the measurement precision is improved, and the theoretical precision of less than 0.1mm can be reached.

Description

technical field [0001] The invention relates to the technical field of positioning and navigation, in particular to a wireless and ultrasonic composite positioning system and a positioning method thereof. Background technique [0002] Indoors is the place where human activities are the most intensive and most related to human life and production. Indoor positioning can be regarded as the most closely related component of positioning technology and people, and its important potential applications have attracted a lot of research and attention in recent years. Due to the existence of a large number of obstacles such as walls and screens in the room, the multipath effect is serious, and the field strength distribution is uneven and even blind spots exist. The frequent movement of people, the opening and closing of electronic equipment and doors and windows also bring a lot of random and unpredictable interference and fluctuations to signal transmission. Therefore, positioning...

AI Technical Summary

Problems solved by technology

[0004] The existing ultrasonic positioning technology mainly has the following defects: (1) The ultrasonic transmission process has obvious attenuation; (2) The ultrasonic wave is affected by multipath effect and non-line-of-sight propagation

These shortcomings lead to the fact that these technologies can basically only be used in places where there are no people and the environment is relatively empty.

Images