Acoustic positioning system and acoustic positioning method for object in building environment

An acoustic positioning and targeting technology, applied in radio wave measurement systems, beacon transmitters, measurement devices, etc., to overcome multipath interference and high-frequency stray noise interference, strong system expansion capability, improved measurement accuracy and system robustness sexual effect

Inactive Publication Date: 2012-10-10
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0013] The purpose of the present invention is to provide a high-precision, high-reliability positioning method by combining acoustic positioning technology with wireless Internet of Things technology in view of the fact that the existing positioning technology cannot provide a high-precision and low-cost mobile target positioning method in a complex building environment. Distributed acoustic positioning system with cost-effective advantages

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  • Acoustic positioning system and acoustic positioning method for object in building environment
  • Acoustic positioning system and acoustic positioning method for object in building environment
  • Acoustic positioning system and acoustic positioning method for object in building environment

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Embodiment Construction

[0024] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0025] figure 1 It is a structural schematic diagram of an acoustic positioning system for a target in a building environment according to an embodiment of the present invention.

[0026] Such as figure 1 As shown, the system includes wireless interrogation-synchronization controller (WISC), multiple positioning sensors (only one in the unit space is shown in the figure), and multiple ultrasonic probes drawn from each positioning sensor (only one is shown in the figure The three ultrasonic probes led by the positioning sensor are ultrasonic probe 1, ultrasonic probe 2 and ultrasonic probe 3), and the positioning label. A positioning sensor and the ultrasonic probe it leads out may be called a positioning sensing unit, which is connected to the WISC through Ethernet.

[0027] The WISC established in the building spac...

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Abstract

The invention relates to an acoustic positioning system and an acoustic positioning method for an object in a building environment. The acoustic positioning method comprises steps of transmitting a positioning inquiring command in a global broadcast manner; transmitting ultrasonic pulses at a regular time according to the positioning inquiring command by the object; synchronously, acquiring audio signals of ultrasonic pulses from a plurality of acquisition points; performing matched filtering and detection on acquired multichannel audio signals to screen out effective audio signals; determining propagation time delay of the ultrasonic pulses of the corresponding channels according to the position of a first peak of the effective audio signals; and working out position coordinates of the object according to the propagation time delay of the ultrasonic pulses and the coordinates of the corresponding acquisition points. An acoustic positioning technology and a wireless internet of things technology are combined, sound pulses are matched, and effective pulses are screened out, so multipath interference and high-frequency random noise interference are overcome, measurement precision and system robustness are improved, and the ultrasonic positioning system is high in positioning precision, good in system expansibility and low in cost.

Description

technical field [0001] The invention relates to a space positioning technology, in particular to an acoustic positioning system and method for a moving target in a building environment. Background technique [0002] [1] Acoustic positioning and enhancement, 200710087941.3, national invention patent [0003] [2] Ultrasonic Positioning Control System Based on Network Environment, 201010609587.8, National Invention Patent [0004] [3] Ultrasonic positioning method for active long-distance radio frequency electronic tags, 200610024717.5, national invention patent [0005] Acoustic positioning technology is a technology that usually uses ultrasonic frequency bands for positioning in order to avoid the impact on audible sounds. The basic principle of this technology is to use the characteristics of slow propagation speed of sound waves and easy implementation of audio signal processing, and realize distance measurement and spatial position calculation of sound source by measurin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/80
Inventor 王磊丁健陈新桥李冰
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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