Design of a circuit for a smart seat adjustment system

A system is designed and implemented that can adjust the seat height according to the user's height. Its main functions are as follows: First, according to the seat users' height that input by the user, the system can obtain the best seat height through analysis, and automatically rise or fall to this height. Second, the system can automatically detect the length of time of using the chair and give an alarm according to the standard of sedentary time. The hardware of this system consists of distance measure module, pressure detection module, motor drive module, key and display module. The main control chip used in this system is STC89C52, and an ultrasonic sensor is HC-SR04 as the ranging part. According to the designed circuit, the hardware is installed, the software is debugged, and the expected functions are realized.