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Vehicle speed measurement, positioning method and device, and electronic equipment

A vehicle and speed measurement technology, which is applied in the direction of using a device to measure the time required to move a certain distance, navigation through speed/acceleration measurement, etc., can solve the problem of low accuracy of vehicle speed estimation, and achieve the effect of precise vehicle positioning

Active Publication Date: 2022-06-14
ALIBABA (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a vehicle speed measurement and positioning method and device and electronic equipment to solve the defect of low accuracy of vehicle speed estimation in the prior art when GPS signals are weakened or missing, and improve the accuracy of vehicle speed estimation

Method used

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  • Vehicle speed measurement, positioning method and device, and electronic equipment
  • Vehicle speed measurement, positioning method and device, and electronic equipment
  • Vehicle speed measurement, positioning method and device, and electronic equipment

Examples

Experimental program
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Effect test

Embodiment 1

[0053] figure 2 It is a flowchart of an embodiment of the vehicle speed measurement method provided by the present invention. The execution body of the method can be the above-mentioned business system, or can be various terminal devices with GPS navigation function and inertial sensors, such as smart phones or vehicle-mounted navigators. and other terminal equipment, it can also be a device or chip integrated on these terminal equipment. like figure 2 As shown, the vehicle speed measurement method includes the following steps:

[0054] S201, continuously acquiring the acceleration of the vehicle in the vertical direction.

[0055] S202, according to the acceleration of the vehicle in the vertical direction, identify the vibration time point when the front wheel of the vehicle passes the obstacle and the vibration time point when the rear wheel passes the obstacle.

[0056] In the embodiment of the present invention, first, the acceleration sensor and gyroscope of the nav...

Embodiment 2

[0064] image 3 A flow chart of another embodiment of the vehicle speed measurement method provided by the present invention. like image 3 shown in the above figure 2 On the basis of the illustrated embodiment, the vehicle speed measurement method provided in this embodiment may further include the following steps:

[0065] S301, continuously acquiring the acceleration of the vehicle in the vertical direction.

[0066] In the embodiment of the present invention, first, the acceleration sensor and gyroscope of the navigation device are used to calculate the attitude of the navigation device in space, and then the measured acceleration is rotated to the navigation coordinate system to extract the acceleration in the vertical direction.

[0067] S302 , perform low-pass filtering processing on the acceleration of the vehicle in the vertical direction.

[0068] In the embodiment of the present invention, the acceleration in the vertical direction can be effectively detected b...

Embodiment 3

[0082] Figure 4a This is a flow chart of an embodiment of the vehicle positioning method provided by the present invention. like Figure 4a shown in the above figure 2 On the basis of the embodiment of the vehicle speed measurement method shown, the embodiment of the present invention may further perform vehicle positioning, and the specific method may include the following steps:

[0083] S401, continuously acquiring the acceleration of the vehicle in the vertical direction.

[0084] S402, according to the acceleration of the vehicle in the vertical direction, identify the vibration time point when the front wheel of the vehicle passes the obstacle and the vibration time point when the rear wheel passes the obstacle.

[0085] In the embodiment of the present invention, first, the acceleration sensor and gyroscope of the navigation device are used to calculate the attitude of the navigation device in space, and then the measured acceleration is rotated to the navigation c...

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Abstract

Embodiments of the present invention provide a vehicle speed measurement and positioning method and device, and electronic equipment. The vehicle speed measurement method includes: continuously acquiring the acceleration of the vehicle in the vertical direction; according to the acceleration of the vehicle in the vertical direction, identifying the vibration time point when the front wheel of the vehicle passes the obstacle and the vibration when the rear wheel passes the obstacle Time point; calculate the time length between the vibration time point when the front wheel of the vehicle passes through the obstacle and the vibration time point when the rear wheel passes through the obstacle; obtain the vehicle wheelbase, divide the vehicle wheelbase by the The above length of time is used to obtain the first driving speed of the vehicle. The embodiment of the present invention uses the inertial sensor of the navigation device to obtain the change of the acceleration of the vehicle in the vertical direction, detects the vibration information generated by the vehicle passing through the obstacle, and obtains a more accurate vehicle driving through the time difference of the vibration of the front and rear wheels of the vehicle. speed, thereby achieving more precise vehicle positioning.

Description

technical field [0001] The present invention relates to the technical field of computers, and in particular, to a vehicle speed measurement and positioning method and device and electronic equipment. Background technique [0002] The vehicle dead reckoning (Vehicle Dead Reckoning; hereinafter referred to as: VDR) technology is to estimate the current position of the vehicle according to the position of the vehicle measured last time, combined with the speed and heading. The existing navigation equipment adopts the VDR technology, and uses the Global Positioning System (Global Position System; hereinafter referred to as: GPS) and inertial sensors to perform fusion positioning on the vehicle. [0003] Under the existing technical conditions, at least four satellites must be in the field of view of the GPS receiving module for GPS positioning to work properly. In urban environments where GPS navigation accuracy is critical, the line of sight to the sky is often obstructed, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P3/64G01C21/12
CPCG01P3/64G01C21/12
Inventor 赵晖
Owner ALIBABA (CHINA) CO LTD