Novel ultrasonic radar sensor
A radar sensor and ultrasonic technology, which is applied in the re-radiation of sound waves, instruments, radio wave measurement systems, etc., can solve the problems of unable to obtain coordinate information, unable to obtain obstacle coordinate information, and unable to receive echoes by radar, to eliminate blind spot effect
Pending Publication Date: 2019-03-08
清华大学苏州汽车研究院(吴江) +1
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Problems solved by technology
However, the current ultrasonic sensors can only calculate the distance of the detected object through the time difference between sending and receiving ultrasonic waves by the ultrasonic probe, and cannot obtain the coordinate information of obstacles; When the object is not in the area covered by two adjacent radars, there is also the problem of not being able to obtain coordinate information
In addition, when a single radar is working, due to the characteristics of the radar itself, there will be a certain blind area
like figure 1 As shown, due to the time of the radar itself and the after-vibration time after the radar sends the wave, the radar cannot receive the echo within a period of time after it starts to send the wave, so there will be a certain blind area at a short distance
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[0021] Such as figure 2 As shown, a new type of ultrasonic radar sensor includes two radar probes A and B arranged horizontally. The two radar probes are placed in a sensor housing C and assembled in one piece.
[0022] Such as image 3 As shown, when one radar probe A is sending ultrasonic waves, the other radar probe B is only used to receive ultrasonic waves, so as to achieve full coverage of the detection range. According to the difference in the time when the two radar probes receive echoes and the fixed distance between the two radar probes A and B, the coordinates of the obstacle are calculated through the integrated XY algorithm.
[0023] Assume that when radar probe A sends ultrasonic waves, the echo time received by radar probe A is tA, and the echo time received by radar probe B is tAB, the fixed distance L between the two radar probes A and B, XY algorithm The steps to calculate the obstacle coordinates include:
[0024] (1) XY coordinate calculation processing...
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The invention discloses a novel ultrasonic radar sensor. The device comprises two radar probes which are arranged horizontally, wherein the two radar probes are arranged in a sensor shell and are integrally assembled; when one radar probe A transmits ultrasonic waves, the other radar probe B only receives ultrasonic waves. According to different time of receiving ultrasonic waves by the two radarprobes and the fixed distance between the radar probe A and radar probe B, the coordinates of an obstacle are calculated by the integrated XY algorithm. A new working mode of the ultrasonic sensor isdesigned, and two probes are horizontally arranged in an integrated manner; when one radar transmits ultrasonic waves, the other radar only receives the ultrasonic waves, so that a dead zone caused bythe characteristics of a single radar can be eliminated. According to the ultrasonic sensor, spontaneous signal transmission and reception are realized, an XY algorithm is integrated, and coordinateinformation of the obstacle can be accurately calculated.
Description
technical field [0001] The invention relates to a backing assist system, in particular to a novel ultrasonic radar sensor. Background technique [0002] At present, ultrasonic reversing radar has been widely used in vehicle driving and reversing assistance systems due to its strong penetrating power, simple ranging principle, high ranging accuracy, not easily affected by bad weather, and low cost. However, the current ultrasonic sensors can only calculate the distance of the detected object through the time difference between sending and receiving ultrasonic waves by the ultrasonic probe, and cannot obtain the coordinate information of obstacles; When the object is not in the area covered by two adjacent radars, there is also the problem of not being able to obtain coordinate information. In addition, when a single radar is working, due to the characteristics of the radar itself, there will be certain blind spots. Such as figure 1 As shown, due to the time of the radar it...
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Patent Timeline
Login to View More IPC IPC(8): G01S15/93G01S15/06
CPCG01S15/06G01S15/931G01S2015/932
Inventor 吕英超施赛赛
Owner 清华大学苏州汽车研究院(吴江)