Design and Implementation of a Vehicle Parking Positioning Assistant Device

Abstract

At present, it is difficult to grasp the distance behind the vehicle when reversing vehicles, especially ultra-long and ultra-high vehicles, and there are some potential safety hazards. In order to solve this potential safety hazard and enable vehicles to park in garage more quickly and accurately, this paper designs and implements an ultrasonic ranging and parking positioning auxiliary device based on STC89C52 microcontroller. Main work: First, the overall scheme design of the device is completed. Then, the hardware circuit design and software design of the device are completed, and the hardware circuit composition, software design thinking and working principle are elaborated. Finally, through continuous testing, a large amount of data is collected and the applicable distance range and reliability of the device are analyzed. The test results show that the device can be applied to the auxiliary positioning of large vehicles with good operability and positioning accuracy, and can satisfy the requirement of reversing the vehicle into the garage. Introduction Parking aids for vehicles have undergone several generations of development, each with its own characteristics. The first generation of reversing horn: little beep will repeat the broadcast as long as reversing, but it does not provide distance information to the driver and is of little help to the driver. Second Generation Buzzer: Sound alarm when the reversing distance reaches the preset value. This is the start of reversing radar, which can remind the driver to grasp the reversing distance. However, the man-machine interaction is poor, and the driver cannot know the specific digital information, which is not convenient for judgment. The third generation of digital band display: it can display the distance information measured by the sensor on the digital tube, which realizes interaction, and integrates the digital and band, and can display distance and remind whether it is a safe distance. The fourth generation LCD display: LCD display is similar to digital tube, but LCD dynamic display is a leap. As long as the vehicle is started, the LCD panel will display the vehicle graphics and the distance to the surrounding obstacles. Fifth generation magic mirror reversing radar: rearview mirror and reversing radar are integrated. It can be used as a rearview mirror to observe and also as a display of reversing radar. It can realize accurate measurement within 2m and is easy to install. It is directly installed with rearview mirror and has voice broadcasting function. The sixth generation automatic parking system: according to the ground marking and the surrounding environment, the vehicle-mounted computer measures the distance and angle of the surrounding obstacles with the radar probe installed on the vehicle body, collects the environmental pictures through the cameras around the vehicle body, and then plans the optimal process through the vehicle-mounted computer system to automatically park the vehicle in place. At present, ultrasonic wave is still the best sensor for reversing distance measurement. The development trend in the future is toward human-computer interaction. Single chip computer calculates the distance through sensors. Distance information should be displayed through various means such as digital, image, video, language, etc. It is more convenient for drivers to check. For large vehicles, wireless transmission should also be considered to process and display the data in a unified way. 2nd International Conference on Electrical and Electronic Engineering (EEE 2019) Copyright © 2019, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Engineering Research, volume 185