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Ultrasonic positioning method, device and system

A positioning method and technology of a positioning device, applied in the field of measurement, can solve the problems of serious multipath effect, unable to carry information, unable to distinguish signals, etc., and achieve the effect of avoiding multipath effect and improving accuracy

Inactive Publication Date: 2012-09-19
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

However, due to the complex indoor environment and a lot of interference, ordinary ultrasonic positioning systems have serious multipath effects when receiving ultrasonic signals. Moreover, since ultrasonic signals are only pulse signals and cannot carry information, the system cannot distinguish between many ultrasonic signals. signal reflected from an object
Therefore, the above positioning method seriously restricts the positioning accuracy of ultrasonic technology.

Method used

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  • Ultrasonic positioning method, device and system
  • Ultrasonic positioning method, device and system
  • Ultrasonic positioning method, device and system

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Embodiment Construction

[0058] In order for those skilled in the art to further understand the features and technical contents of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The accompanying drawings are provided for reference and illustration only, and are not intended to limit the present invention.

[0059] The technical solutions of the present invention will be described below in conjunction with the drawings and embodiments.

[0060] see figure 1 , is a flowchart of an ultrasonic positioning method according to an embodiment of the present invention.

[0061] The method can include:

[0062] Step 101, sending a first ultrasonic signal to a point to be measured at a reference point and recording the signal sending time.

[0063] The positioning device or system sends an ultrasonic signal to the point to be measured at the reference point determined by the position coordinates, which is recorded as the first ultra...

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Abstract

An embodiment of the invention provides an ultrasonic positioning method, device and system. The ultrasonic positioning method comprises sending a first ultrasonic signal from a reference point to a point to be measured, and recording signal sending time; receiving a second ultrasonic signal at the reference point, recording signal receiving time, enabling the second ultrasonic signal to be a responding signal after the first ultrasonic signal is received at the point to be measured, and enabling the frequency of the first ultrasonic signal and the frequency of the second ultrasonic signal to be different; and positioning the point to be measured according to the signal sending time, the signal receiving time and the position of the reference point. By enabling the frequency of the ultrasonic signal sent at the reference point to be different from the frequency of the frequency fed back by the point to be measured, the multipath effect in the ultrasonic propagation process and positioning disturbance caused by the ultrasonic wave reflected by other subjects are avoided, and the accuracy of ultrasonic positioning is improved.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to an ultrasonic positioning method, device and system. Background technique [0002] The currently widely used positioning method is GPS (Global Positioning System, Global Positioning System) positioning. However, in an indoor environment, due to obstructions such as walls, the GPS signal is weak and it is difficult to achieve positioning. Therefore, other indoor positioning techniques must be developed. [0003] A current solution for indoor positioning is to use indoor wireless communication technology for positioning. The main wireless communication technologies include infrared, ultrasonic, ultra-wideband, radio frequency identification, and Bluetooth. Among them, ultrasonic technology has many irreplaceable advantages, such as: good directivity, slow energy loss, long transmission distance and no harm to the human body from electromagnetic radiation. [0004] When ultra...

Claims

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Application Information

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IPC IPC(8): G01S5/18
Inventor 张学艳刘振宇李志强李国龙张海英
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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