As a subdivision of the robot industry, security robot is based on the actual needs to complete the tasks of safety protection, patrol monitoring, disaster monitoring and harmful gas monitoring, so as to minimize the occurrence of accidents and reduce the loss of life and property. Although the security robot is in its infancy, it has great development potential and broad application prospects under the huge market demand.
Security robot system
Security robot is a complex system, which involves chassis control, induction, data acquisition and transmission, background monitoring and so on. The hardware system visible in the figure below includes PTZ, infrared thermal imager, visible camera, lidar, laser vibrometer, night vision lamp, navigation module, 4WD Chassis and antenna. Security robot and system functional features:
Patrol Duty: self obstacle avoidance, self positioning and self charging;
360 ° panoramic monitoring: the robot is equipped with a high-definition night vision camera to form a three-dimensional security with the traditional monitoring system, and provides video storage and historical video query;
Monitoring and early warning: the robot is equipped with various monitoring equipment, such as smoke detection, and can automatically give early warning if abnormalities are detected by thermal imaging;
Intelligent detection: during the working process, the robot can collect and monitor data such as portrait, vehicle, pedestrian and specific abnormalities;
Remote disposal, warning and deterrence;
Patrol broadcast and visit guide;
Power demand of security robot
The servo steering actuator of the security robot is the power center of the robot. The power conversion module supplies power for this and ensures the stable and reliable operation of the servo actuator. The customer previously adopted the power control chip scheme, with many peripheral devices and low product reliability and consistency. At the same time, the robot basically works outdoors, and the environmental adaptability is more complex. How to ensure stable power supply and long-term reliable operation of the system is the direction of the engineers. VICOR power module solves the difficult problems of the system:
High efficiency: ensure the endurance of the system and the optimal design of the power supply system;
Small volume: limited by the installation space of the robot, the volume of peripheral devices is required to be as small as possible;
High reliability and long-term stability: the robot works outdoors, and the power supply system needs to have stable and reliable output in harsh environments such as high temperature and lightning stroke;
Simple heat dissipation treatment: the power module still has stable output under the maximum power, which requires appropriate heat dissipation treatment. The system engineer expects the heat dissipation design of the power module to be as simple as possible;
The biggest difference of security robot is its flexibility. It is generally four-wheel four-wheel drive or six wheel six-wheel drive, and the wheels can turn. In this system, VICOR's pi3526 and pi3740: 48V batteries are used to power the system. The 48V power supply is converted into 24V voltage required by four steering servo steering gears through pi3740. The current of each wheel is about 4a. At the same time, it is also used to power the standby battery through pi3740; Pi3526 converts 48V power supply to 12V voltage to supply power to system processor
