Location method based on map and speed bump matching
A positioning method and technology of speed bumps, which are applied in satellite radio beacon positioning systems, measuring devices, instruments, etc., can solve problems such as application limitations, high requirements for mobile phone battery supply, and energy consumption for searching satellite signals
Active Publication Date: 2016-03-02
SHANGHAI JIAOTONG UNIV
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[0004] The current GPS (Global Positioning System, Global Positioning System) positioning will be blocked by buildings, and often cannot receive satellite signals, and it consumes a lot of energy when the GPS module searches for satellite signals, which requires a high supply of mobile phone batteries, so in The application in the actual scene will be subject to certain restrictions
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[0023] In order to make the content of the present invention clearer and easier to understand, the content of the present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.
[0024] Aiming at the deficiencies in the prior art, the inventor has advantageously observed that smart phones can provide direction and acceleration data, cars have odometers that can record the distance traveled at each moment, and speed bumps are used as road facilities in downtown areas and campuses. Universal distribution, and the position of each speed bump is very fixed; thus, after an electronic map and initial position are given, the smart phone and the car odometer can be used for map matching, and then the speed bump information can be used for Matching; more importantly, every time the speed bump is passed, it is clearly reflected in the acceleration measured by the smartphone. Based on these observations and analysis, the inventor p...
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The invention provides a location method based on matching of a map and deceleration strips. The location method comprises the steps: carrying out system initialization of an electronic map and a smart phone; by combining with the electronic map and an initial position and using a direction detected by a smart phone sensor in a driving direction and a reading of a speedometer in a vehicle, obtaining a sequence with respect to time, screening all possible paths by using a map matching algorithm in the electronic map; processing an acceleration sequence on a direction vertical to the ground, speculating all positions which are possibly the deceleration strips, meanwhile, figuring out a moment of the deceleration strip on the position and a driving direction of the vehicle at this moment; selecting a candidate path which is coincident with the deceleration strips in driving direction from all possible paths, and determining a moment through which the deceleration strips pass; and as for each candidate path, obtaining a sequence with respect to time according to the moment that a vehicle passes through the deceleration strips and reading of a speedometer, measuring the length of a path between the deceleration strips through which the vehicle passes, and finding a path with maximum probability by using a probability estimation algorithm.
Description
technical field [0001] The invention relates to a positioning method based on matching of a map and a speed bump, which can input data through a smart phone, a vehicle odometer and an electronic map, and locate a target according to the position of the speed bump. Background technique [0002] Positioning technology is a very important application technology with a wide range of application scenarios. Moreover, positioning technology is a technology that has been extensively researched. Existing positioning technologies can be roughly divided into two categories: ranging-based positioning technology and connectivity-based positioning technology. [0003] Distance-based positioning needs to measure the relative distance between objects, and requires high measurement accuracy. Today, the main measurement method is based on RSS (that is, the received signal strength), the angle of arrival signal, the difference in arrival time, etc. . On the contrary, the connectivity-based ...
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IPC IPC(8): G01C21/26G01C21/34
CPCG01C21/30G01C21/3446G01C21/3461G01S19/49
Inventor 丁冬冬朱燕民
Owner SHANGHAI JIAOTONG UNIV