Method and apparatus based on radar for preventing collision while passing under a bridge

Abstract

The invention discloses a method and apparatus based on a radar for preventing collision while passing under a bridge. The method includes: controlling the radar to emit a detection beam for the first time and receives a reflection beam, calculating a linear distance L1 between the radar and the bridge; at the same time as the radar emits the detection beam for the first time, acquiring a real-time velocity V(t) of a vehicle; after a preset time interval [delta] T, controlling the radar emits a detection beam for the second time and receives the reflection beam, and calculating a linear distance L2 between the radar and the bridge at the moment; calculating a driving distance Ld of the vehicle; calculating a height H between the bridge and the pavement; comparing the height H of the bridge and the height Hv of the vehicle, and if Hv is equal to or greater than H, sending an alert. The embodiments of the invention allow an automatic assessment of the height limit of the bridge and can prevent errors due to subjective judgment of a person, and is easy to implement and high in reliability.

Description

technical field [0001] The invention relates to the technical field of automobile auxiliary driving, in particular to a radar-based bridge traffic collision avoidance method and device. Background technique [0002] At present, there are bridges that intersect with it on most roads, and these bridges have a certain height limit. When the total height of the car, especially the truck, is greater than the height limit of the bridge, a bridge collision accident will be sent to the driver and the driver. Loss of public property and even serious traffic accidents. Moreover, some bridges do not have height limit signs, and the driver's subjective judgment based on visual inspection will inevitably lead to errors, resulting in inaccurate judgments and accidents. Therefore, it is necessary to propose a bridge traffic anti-collision method and device to prevent accidents. Contents of the invention [0003] The invention provides a radar-based bridge traffic anti-collision method ...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a radar-based bridge traffic anti-collision method and device, aiming to solve the problem of large error in human subjective judgment of bridge height when the bridge has no height limit mark, realize accurate measurement of bridge height limit, and avoid losses and accidents

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