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Backing up distance measurement method, device and system

A ranging method and technology for automobiles, which are applied in measurement devices, radio wave measurement systems, and re-radiation of sound waves, etc., can solve the problems of long ranging period and slow obstacle information feedback of reversing radar systems, so as to reduce collision accidents, The effect of enhancing sensitivity and reducing reaction time

Inactive Publication Date: 2014-08-06
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that the reversing radar system has a long ranging cycle and the feedback of obstacle information is slow, the embodiment of the present invention provides a reversing ranging method, device and system

Method used

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  • Backing up distance measurement method, device and system
  • Backing up distance measurement method, device and system
  • Backing up distance measurement method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] like figure 2 As shown, the embodiment of the present invention provides a reversing distance measuring method, which is suitable for controlling multiple first ultrasonic sensors for distance measurement. The multiple first ultrasonic sensors can be arranged at the front of the vehicle or at the rear of the vehicle. The method includes:

[0040] S10: Control one of the first ultrasonic sensors among the plurality of first ultrasonic sensors to emit ultrasonic waves;

[0041] S11: Determine the time point at which the first ultrasonic sensor emits ultrasonic waves;

[0042] S12: controlling multiple first ultrasonic sensors to receive echo signals at the same time;

[0043] S13: respectively determine the echo time points at which the echo signals are received by the plurality of first ultrasonic sensors;

[0044] S14: Calculate the vertical distance between the vehicle and the obstacle according to the time difference between the emission time point and the echo ti...

Embodiment 2

[0047] like image 3 As shown, the embodiment of the present invention provides a reversing ranging method, which is suitable for controlling a plurality of first ultrasonic sensors and a plurality of second ultrasonic sensors for ranging, and the method includes:

[0048] S20: Control one first ultrasonic sensor among the plurality of first ultrasonic sensors to emit ultrasonic waves.

[0049] Specifically, as Figure 4 As shown, in the embodiment of the present invention, four first ultrasonic sensors T1, T2, T3, T4 are arranged at the rear of the car, the obstacle B1 is on the parking path of the car, and only the first ultrasonic sensor T1 works when emitting ultrasonic waves.

[0050] S21: Determine the time point at which the first ultrasonic sensor emits ultrasonic waves.

[0051] Specifically, when the first ultrasonic sensor T1 emits ultrasonic waves, the controller records the emission time point. Ultrasound is the part of the sound wave frequency exceeding 20KHz, a...

Embodiment 3

[0078] like Figure 7 As shown, the embodiment of the present invention also provides a reversing distance measuring device, which is suitable for controlling a plurality of first ultrasonic sensors for distance measurement. The plurality of first ultrasonic sensors can be arranged at the front of the vehicle or at the rear of the vehicle. Please refer to Embodiment 2 for the reversing ranging method, the device includes:

[0079] The first control unit 201 is used to control one of the first ultrasonic sensors in the plurality of first ultrasonic sensors to emit ultrasonic waves, and to determine the emission time point of the ultrasonic waves, to control the plurality of first ultrasonic sensors to receive echo signals at the same time, and to determine respectively Echo time points when multiple first ultrasonic sensors receive echo signals;

[0080] The calculation unit 202 is used to calculate the vertical distance between the vehicle and the obstacle according to the ti...

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Abstract

The invention discloses a backing up distance measurement method, device and system, and belongs to the technical field of cars. The backing up distance measurement method comprises the steps of controlling one of a plurality of first ultrasonic transducers to emit ultrasonic waves and determining the time point of emitting the ultrasonic waves; controlling the first ultrasonic transducers to receive echo signals at the same time, and respectively determining the echo time points of receiving the echo signals by the ultrasonic transducers; according to the difference between the emission time point and the echo time points of receiving the echo signals, calculating the perpendicular distance between the cars and obstacles. According to the backing up distance measurement method, device and system, a controller is used for carrying out one-emission and many-reception distance measurement control on the first ultrasonic transducers, the response time of distance measurement by the system is shortened, the sensitivity of distance measurement by the system is improved, and the phenomenon that due to the fact that alarms about the information of the obstacles are not timely, collision accidents are caused can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method, device and system for reversing distance measurement. Background technique [0002] The full name of reversing radar is "reversing anti-collision radar". It is a parking assistance system and a safety auxiliary device when parking or reversing a car. The reversing radar system can inform the driver of the surrounding obstacles with sound or more intuitive obstacle position display, which relieves the trouble caused by the driver's front, rear, left, and right visits when parking, reversing, and starting the vehicle, and helps the driver to clean up. The defects of blind spots and blurred vision improve driving safety. [0003] The reversing radar system generally adopts the principle of ultrasonic ranging. The ultrasonic sensor is designed with piezoelectric ceramics. This original can convert voltage signals into mechanical vibration signals, and can also convert ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/08G01S15/93
CPCG01S15/08G01S15/931G01S2015/932
Inventor 金飞沈红荣王慧敏
Owner CHERY AUTOMOBILE CO LTD
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