What are the advantages of collaborative robots?

Safety: When robots interact with humans, it is necessary to ensure the safety of the person. Collision detection is a cooperative function that robots must achieve and a prerequisite for human-machine cooperation. The International Organization for Standardization (ISO) released the ISO/TS 15066 standard in 2016, which categorizes the safety of collaborative robots into four aspects: safety level monitoring, manual teaching, power and force limitations, and speed and separation monitoring.

Traditional industrial robots typically work within protective fences or other protective measures, while collaborative robots can directly work with operators on the same production line without the need for safety fences to isolate personnel, bridging the gap between fully manual and fully automated production modes. Traditional robots also have collision detection capabilities, but the purpose of traditional robot collision detection is generally to reduce the impact of collision forces on the robot body and avoid damage to the robot body or its surroundings. The role of collaborative robot collision detection is to solve the problem of human robot interaction. Implemented through force sensitive skin, joint torque sensors, current estimation force feedback models, etc. In terms of implementation, the setting of collision force must be reflected to meet the flexible setting of forces in different environments.

Easy to learn: A more direct way to use it is to drag it. Many companies have introduced graphical programming interfaces through optimization of robot programming languages. The principle of drag teaching is to use the dynamic model of the robot, and the controller calculates the torque required for the robot to be dragged in real time, and then provides the torque to the motor, so that the robot can effectively assist the operator in dragging. The calculation formula includes inertial force term, Coriolis force and centrifugal force term, gravity term, and friction term.

According to the selected friction model, it can be decomposed into viscous friction term, Coulomb friction term, and compensation. The calculation of friction is a relatively complex mathematical model. Is there any sensing compensation technology based on the current implementation of technology; Optimization model calculation based on external force sensor feedback for elastic device expansion and contraction model calculation. Each robot company has unique advantages in this step, which can achieve gravity free teaching function.

Low cost: Currently, the average price of collaborative robot bodies is about 130500 yuan, and it is expected to drop to 88000 yuan by 2022. Compared with general industrial robots, the price advantage is obvious.

Flexibility: Collaborative robots are lightweight, adaptable to different mobile scenarios, and easy to install. Product installation and mobile deployment are relatively flexible.

In order to reduce the kinetic energy of robot movement, collaborative robots are generally lightweight and have relatively simple structures, which leads to a lack of rigidity in the entire robot. The working range is comparable to that of a human arm, but the positioning accuracy is inferior to traditional robots.