Nowadays, with the rapid development of science and technology, the application of small intelligent systems at home and abroad is more and more extensive, and there are more and more types. This design is a design-related subject identified in conjunction with relevant research projects. The smart car designed should be capable of remote control. The intelligent car control system adopts a STC89C51 single-chip microcomputer as the main control chip of the control system. The hardware includes the following modules: drive motor module, single-chip control module, bluetooth module and power module. This design adopts STC89C51 single-chip microcomputer as the core control part of the smart car, and realizes the intelligent control of the car through the query mode. The trolley consists of a main control panel, a power supply system and a body. The main control system consists of the main control CPU circuit and DC motor drive circuit. The DC motor drive adopts PWM modulation technology, which can flexibly and conveniently control the vehicle speed and travel direction.
Platform selection instructions
MCU development board, with STC15F2K61S2 chip as the control core
Design Notes
After repeated argumentation, we finally determined the following options:
1. The car body is a special electric car. 2. Using STC15 microcontroller as the control core. 3. Powered by a 12V lithium battery. 4. Use the Bluetooth module as the Bluetooth slave on the lower computer.
Circuit principle: This system uses the single-chip STC89C51 single-chip microcomputer as the main control module of the system. We use the android mobile phone to control the Bluetooth slave on the vehicle. The signal recognized by the sensor is analyzed and judged by the single-chip microcomputer, and the control of the DC motor is controlled. To achieve direction change. The schematic diagram of the car is shown in the figure below. The motor controls the direction and speed of rotation through the L293F chip. Among them, SPEED1 and SPEED2 control the speed of two motors through PWM regulation, IN1 and IN2 control the direction of rotation of the left motor, and IN3 and IN4 control the direction of rotation of the right motor. By controlling these six ports, the trolley can travel according to a predetermined trajectory.
The car body structure is good, completely independent design, the car adopts two-layer structure, and the components of different modules are separated, and the debugging process and the modification process are relatively simple. This design adopts STC89C51 single-chip microcomputer as the control core to realize the intelligent control of the car. The control system not only has strong practical value in the smart car, but also has strong practical value in automotive applications and intelligent robots, especially in the field of robot research. Therefore, this design is related to reality and has important practical significance.
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