Moving object indoor positioning method and moving object indoor positioning system
A moving target, indoor positioning technology, applied in the field of positioning, can solve the problems of high cost and low indoor positioning accuracy
Active Publication Date: 2017-09-01
GUANGZHOU INST OF RAILWAY TECH
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Problems solved by technology
[0004] Based on this, it is necessary to provide a high-precision and low-cost indoor positioning method and system for moving objects in order to solve the problem of low precision or high cost of traditional indoor positioning.
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[0030] refer to figure 1 , the indoor positioning method for a moving object in one embodiment can be applied to a signal receiving device installed on a moving object and moving together with the moving object, and the method includes the following steps.
[0031] S110: Receive ultrasonic signals synchronously sent by at least three transmitting devices installed indoors, and detect the number of rows of ultrasonic signals received within a preset synchronization period.
[0032] Multiple transmitting devices are installed indoors, and sending ultrasonic signals synchronously means sending ultrasonic signals at the same time. The preset synchronization period is the time required to complete a round of signal transmission and reception in the case of synchronous transmission by multiple transmitting devices, which can be specifically set according to actual needs, for example, the preset synchronization period is 43ms (milliseconds).
[0033] Wherein, within a preset synchro...
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The invention relates to a moving object indoor positioning method and a moving object indoor positioning system. The method comprises steps: ultrasonic signals simultaneously transmitted by at least three transmitting devices arranged indoors are received, and the column number of ultrasonic signals received in a preset synchronization cycle is detected; when the column number belongs to a preset range, the receiving time duration of each column of received ultrasonic signals is acquired, the distance between the transmitting device corresponding to each column of ultrasonic signals and the moving object is acquired respectively according to a preset propagation speed and the receiving time duration, a synchronization distance value is obtained, the coordinate points of the moving object are acquired according to the synchronization distance value, synchronization coordinate points are obtained, and according to the synchronization coordinate points and the already-stored indoor area information of the target, the indoor positioning position point of the moving object is determined; and when the column number does not belong to the preset range, according to a preset number of already-stored coordinate points, predicted coordinate points of the moving object are acquired and serve as the indoor positioning position point of the moving object. Thus, the positioning precision is high, and the ultrasonic positioning cost is low.
Description
technical field [0001] The invention relates to the technical field of positioning, in particular to an indoor positioning method and system for a moving object. Background technique [0002] Satellite positioning cannot be used in indoor environments. When locating indoor targets, such as locating staff on trains or high-speed rails, indoor positioning technology is required. Commonly used indoor positioning technologies can be divided into the following three categories according to the nature of the signal source: the first category is Wi-Fi (Wireless Fidelity), iBeacon, Zigbee, UWB (Ultra-wide Bandwidth), etc., which belong to the category of radio waves. The second category is laser radar, infrared, LED, etc., which belong to the category of light waves, and the third category is ultrasonic indoor positioning technology. [0003] For the indoor positioning of moving targets, there are usually dense crowds and long and narrow passages (such as trains and high-speed rail...
Claims
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Login to View More IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 许爱军赵石虎刘永福陈鑫蒋新革
Owner GUANGZHOU INST OF RAILWAY TECH