Backing distance measuring method and device, and backing radar

A technology of reversing radar and distance, which is applied in the field of testing reversing distance and reversing radar, and can solve the problem that the sensitivity of reversing radar cannot be adjusted.
CN102360078BActive Publication Date: 2013-05-15SHENZHEN LONGHORN AUTOMOTIVE ELECTRONICS EQUIPCO
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
SHENZHEN LONGHORN AUTOMOTIVE ELECTRONICS EQUIPCO
Publication Date
2013-05-15

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Abstract

The invention provides a backing distance measuring method, a backing distance measuring device and a backing radar, which are suitable for the field of application of automobiles. The method comprises the following steps of: emitting an ultrasonic pulse signal by using a probe; acquiring a reflected pulse signal, and converting the pulse signal into first voltage; comparing the first voltage with preset first reference voltage; when the first voltage is not higher than the first reference voltage, comparing the first voltage with reference voltages in a preset reference voltage set sequentially, wherein the reference voltage set is a set of a group of reference voltages of which the voltage values are decreased sequentially and is relevant to pulse propagation time respectively; and acquiring a first reference voltage which is less than the first voltage from the reference voltage set, setting the reference voltage to be a second reference voltage, and acquiring a first obstruction distance according to time corresponding to the second reference voltage. The sensitivity of the backing radar can be flexibly changed.
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Description

technical field

[0001] The invention belongs to the field of automobile applications, and in particular relates to a method and device for testing the reversing distance and a reversing radar. Background technique

[0002] In the existing reversing radar, when testing the reversing distance, only a reference voltage is set to judge the distance of obstacles. When the value of the reference voltage is large, it is difficult to detect obstacles far away, that is, it is not sensitive; and when the value of the reference voltage is small, although obstacles near the distance are easy to detect, they are also insensitive. It is easy to cause false alarms due to the detection of "pseudo" obstacles such as the ground, that is, the sensitivity is too high.

[0003] Therefore, the sensitivity of the existing parking radar is determined and cannot be adjusted as required. Contents of the invention

[0004] The purpose of the embodiments of the present invention is to provide a met...

Claims

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