Engelberg studied servo theory in university, which is a theory to study how the motion mechanism can better track the control signal. Devall invented a system in 1946, which can "reproduce" the recorded machine movements. In 1954, Devall obtained the patent of programmable manipulator, which works according to the program, and can make different programs according to different work needs, so it has universality and flexibility. Engelberg and Devall are both studying robots, and think that the automobile industry is most suitable for working with robots, because it works with heavy machines, and the production process is relatively fixed. In 1959, Engelberg and Devall jointly produced the first industrial robot.
the robots developed in the last hundred years have roughly experienced three growth stages, that is, three times. The first generation is a simple individual robot, the second generation is a group labor robot, and the third generation is an intelligent robot similar to human beings. Its future development direction is to be conscious, thinking and able to talk to people.