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Wireless sensing network and ultrasonic wave-based indoor positioning system and method

A wireless sensor network and indoor positioning technology, applied in the field of ultrasonic indoor positioning system, can solve the problems of unstable ranging data, high hardware wiring cost, high burr level, etc., to save wiring hardware cost, work energy consumption, The effect of improving accuracy

Active Publication Date: 2017-08-18
HARBIN INST OF TECH
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Problems solved by technology

[0002] The existing ultrasonic-based indoor positioning system is faced with poor positioning accuracy, unstable ranging data, and high hardware wiring costs. Therefore, there is no commercial system product yet. Due to environmental interference and white noise interference in hardware circuits, it often occurs A high level glitch occurs, which will cause a misjudgment of the system, thus affecting the large error of the system detection

Method used

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  • Wireless sensing network and ultrasonic wave-based indoor positioning system and method
  • Wireless sensing network and ultrasonic wave-based indoor positioning system and method
  • Wireless sensing network and ultrasonic wave-based indoor positioning system and method

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Embodiment Construction

[0049] The present invention will be further described below in conjunction with the accompanying drawings.

[0050] An indoor positioning system based on a wireless sensor network and ultrasonic waves, which is composed of wireless sensor network nodes cooperating with each other. The wireless sensor network nodes are powered by rechargeable lithium batteries, including microprocessors, ultrasonic receivers, ultrasonic transmitters, wifi module and RF module, the microprocessor is connected to the control RF module through the SPI bus to process the time synchronization signal, and it is also connected to the wifi module for data transmission through the serial port communication, and the signal received by the ultrasonic receiver is filtered After the second-order multi-feedback bandpass filter in the amplifying circuit filters out the interference other than the ultrasonic frequency, it is transmitted to the microprocessor for ADC sampling, and the microprocessor generates a...

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Abstract

The present invention relates to a wireless sensing network and ultrasonic wave-based indoor positioning system and method mainly for solving the problem that a conventional positioning detection method is large in error. According to the present invention, by adopting a digital envelope detection technology of digital phase lock amplification, a distance measurement error caused by the interference of the white noise in an environment and a hardware circuit during an ultrasonic ranging process is solved, at the same time, the stability of the measurement data is improved substantially, during the distance measurement, by adopting a time synchronization method based on the RF communication, the time synchronization precision of an emission node and a target node is improved, thereby improving the distance measurement precision.

Description

technical field [0001] The invention relates to the field of ultrasonic positioning, and relates to an ultrasonic indoor positioning system, which adopts an indoor positioning system and a positioning method based on a wireless sensor network and ultrasonic waves. Background technique [0002] The existing ultrasonic-based indoor positioning system is faced with poor positioning accuracy, unstable ranging data, and high hardware wiring costs. Therefore, there is no commercial system product yet. Due to environmental interference and white noise interference in hardware circuits, it often occurs A high level glitch occurs, which will cause a misjudgment of the system, thereby affecting a large error in system detection. Contents of the invention [0003] In order to solve the problems existing in the background technology, the present invention proposes an indoor positioning system and positioning method based on wireless sensor networks and ultrasonic waves with simple top...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/18H04W64/00H04W84/18
CPCG01S5/18H04W64/003H04W84/18
Inventor 漆军刘国平
Owner HARBIN INST OF TECH
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