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Vehicle distance measurement method and device, vehicle relative speed measurement method and device

A measurement method and technology of relative speed, which is applied in the direction of measuring device, line-of-sight measurement, and the device used to measure the time required to move a certain distance. measured effect

Active Publication Date: 2016-12-28
AUTOCHIPS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, for the measurement of the distance to the vehicle in front, one is to use radar measurement, but the radar cannot distinguish whether it is a vehicle or other obstacles in front, and the price of the radar is expensive; the other is to use the camera to calculate the distance between vehicles through image algorithms, but when When the optical axis of the camera is not parallel to the horizontal plane, calculation errors are prone to occur

Method used

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  • Vehicle distance measurement method and device, vehicle relative speed measurement method and device
  • Vehicle distance measurement method and device, vehicle relative speed measurement method and device
  • Vehicle distance measurement method and device, vehicle relative speed measurement method and device

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] see figure 1 , figure 1 It is a flowchart of an embodiment of the vehicle distance measurement method of the present invention. This implementation mode includes the following steps:

[0039] Step S101: Obtain the horizontal tilt angle of the own vehicle relative to the preceding vehicle.

[0040] In order to test the distance between vehicles, the vehicle generally sets a camera on the vehicle to determine the distance between the vehicle and the vehicle in front by capturing the image of the road ahead captured by the camera. see figure 2 , in the prior art, the distance d between the front vehicle 220 and the own vehicle 210 is generally given by Obtained, wherein, f is the pixel focal length of the camera 230, H is the installation height of the camera 230, and y is the pixel position of the front vehicle 220 on the y-axis of the ima...

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Abstract

The invention discloses a vehicle distance measurement method and device, and a vehicle relative speed measurement method and device. The vehicle distance measurement method includes: obtaining the horizontal inclination angle of the vehicle relative to the vehicle in front; calculating the corrected distance between the vehicle in front and the vehicle in front based on the horizontal inclination angle. The vehicle distance measurement method and device and the vehicle relative speed measurement method and device of the present invention can accurately measure the distance between the own vehicle and the preceding vehicle.

Description

technical field [0001] The invention relates to the technical field of vehicle distance measurement, in particular to a vehicle distance measurement method and device, and a vehicle relative speed measurement method and device. Background technique [0002] In the control center of the vehicle, there are two major systems, one is the front collision warning system (FCWS), and the other is the vehicle deviation warning system (LDWS). The front collision warning system detects the vehicle in front from the image of the vehicle's front camera, and if it finds a potential collision risk, it will send an alarm in advance. The vehicle yaw warning system detects the front lane from the image of the vehicle's front camera, and if it finds that the vehicle deviates from the driving lane, it will send an alarm. [0003] When driving, if you can get the accurate distance of the vehicle ahead and calculate the expected time of rear-end collision, you can effectively remind the driver t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/00G01P3/68B60W30/08
CPCG01C3/10G01C23/00G01P3/68B60W30/095B60W30/0956B60W2420/403
Inventor 钱成
Owner AUTOCHIPS