| 摘要 |
The system for determining the position in automatic doors of the invention is intended to control the speed of the forward motion or backward motion of automatic doors and consequently to control the opening and closing operations. The system can be applied in general to any type of doors and particularly to doors used in railway wagons. The system is comprised of the functional association of means for reading the voltage and current of a direct current motor (1), from which two analog signals are generated and which, through analog/digital converters (5, 5') are transformed into digital signals in order to be compared and processed by a microcontroller (6) which, through a program, calculates the position as a function of the read variables, and according to the calculated position the microcontroller sends actuation instructions to the motor control unit (7). |
