Design and development of circuit board for sweeping robot

At the beginning of intelligent robot design, it focuses on solving the cleaning of family environment. With the progress and discovery of intelligent robot research and application, intelligent robot breaks through the bottleneck of focusing on family cleaning, faces high-end places and has a wide range of applications in many large-scale places. In fact, intelligent robot is an intelligent product in the field of high-tech technology. With the help of ultrasonic bionic technology, it can also avoid obstacles and realize automation and strong cleaning in a dark environment. Compared with ordinary cleaning machines, it has strong cleaning force, more convenient and effective automation, and more powerful function.

1、 Basic working principle of intelligent sweeping robot

1.1 working principle of control keyboard

The control keyboard of intelligent cleaning robot is mostly designed with six common control keys, which form a three by two structure and are connected by some parallel columns. When some of these control keys are not turned on, the resistance on the column line will work to control the normal operation of the keyboard line, so that the keyboard will not work when used. Only when the control key on the keyboard is fully opened according to the requirements can the keyboard control the intelligent cleaning robot.

1.2 working principle of drive motor

The main power supply device of the driving motor is DC motor. DC motor has good linear speed regulation characteristics and excellent control dynamic characteristics, which can efficiently realize the power supply to the intelligent cleaning robot. There is also a driving wheel device, which mainly refers to the left and right wheels arranged on both sides, as well as the driven wheel and steering wheel in the front position. These driving wheels and driven wheels are the main part of the operation of the driving motor. Through the operation of these driving wheels and driven wheels, the intelligent regulation of the forward, backward and steering direction of the intelligent sweeping robot can be realized.

1.3 working principle of dust suction device

The power supply of the dust suction device is also realized by the DC motor, in which MOS tube voltage control software and MOS driving transistors are applied. The drain of these applied software tubes and transistors are connected with the main circuit of the motor to regulate the power of the dust suction device and improve the cleaning power of the intelligent cleaning robot where high-power cleaning is required, Low power cleaning can be replaced at positions that do not need strong cleaning to realize intelligent power cleaning.

2、 Main system scheme design of intelligent sweeping robot

2.1 specific scheme design of main control system

The scheme design of the main control system includes hardware design and software design. The software design mainly applies the intelligent software algorithm, so that the intelligent sweeping robot can remember the location of obstacles according to the algorithm in the system, avoid obstacles in time and complete the cleaning work. The hardware scheme design mainly designs the interrupt source, switching port, control channel, program storage device, etc. the main control system of the intelligent sweeping robot needs multiple necessary interrupt sources, which adopts PWM control channel and serial communication port, so as to facilitate the limited upgrading of the internal storage of the intelligent sweeping robot. In the actual scheme design, the performance of the single chip microcomputer of the main control system is also considered. The single chip microcomputer designed by Freescale enterprises with high quality at home and abroad is adopted to optimize the performance of the main control system in a wider range.

2.2 specific scheme design of drive system

For the scheme design of the driving system of intelligent sweeping robot, brushless DC motor and permanent magnet brushless motor are mostly used at home and abroad to design the driving system of intelligent sweeping robot. In the actual drive system design, the appropriate circuit improvement is also carried out for the brushless DC motor, so that the brushless DC motor can use its own digital processor and microprocessor to better control the regulation circuit.

2.3 scheme design of sensor system

Sensor is a relatively important content in the design of intelligent sweeping robot. Intelligent robot senses the changes of the outside world by virtue of sensor, judges and carries out the next program according to the changes. The scheme design of sensor system includes the design and rational installation of infrared sensor, sensing and receiving sensor and ultrasonic sensor. In the specific design scheme, most of the following points will be considered: first, the anti-interference ability of these sensors, second, the stability of the sensors, and third, the precision of the sensors.

2.4 specific scheme design of some subsystems

Scheme design of remote control subsystem: the design of the remote control subsystem is mainly reflected in the design of the receiving chip of the intelligent sweeping robot. Four infrared chips are set above the robot to receive the relevant signals. The infrared chip design end is also provided with a unified coding format. These formats can not only make the intelligent robot more automatic in the realization of functions, and make the format better provide necessary support for the customized realization of functions, but also make the intelligent cleaning robot more convenient to realize the necessary forward, steering, backward, flash back and other functions in the actual work.

The scheme design of the subsystem of keyboard display: the scheme design of keyboard display mainly includes two parts: one is the function design of the keyboard, the other is the design of the appearance accuracy of the keyboard. The keyboard function design of the intelligent cleaning robot mainly includes the following contents: first, it can display the current time, date and other information in real time; second, it can control the operation path of the intelligent cleaning robot to make the intelligent cleaning robot clean where it is more needed.

epilogue

Intelligent sweeping robot is one of the representatives of extensive robot development and research at present. Its specific working principle roughly involves control keyboard, drive motor, dust suction device, etc. the relevant system scheme design includes the scheme design of some subsystems, the scheme design of main control system, the scheme design of sensor and drive system, etc. In the actual research of intelligent sweeping robot, there are still some parts that need to be optimized and improved, so that the intelligent sweeping robot can be more widely used.