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Elevator door lock detection method and system

The invention relates to an elevator door lock detection method and system; after the door opening command is issued for a threshold time, the elevator door lock is short-circuited. The short-circuit object in the elevator door lock can be judged, thereby accurately controlling the opening and closing of the elevator door machine, thereby reducing the occurrence of a safety accident.

Multi-pump confluence control device, method and system for injection molding machine

The invention relates to a multi-pump confluence control device,method and system of injection molding machine; it can solve the problem that the use efficiency of the pump in the injection molding machine control system is low, the frequency of use of the pump is high, and the load is too high.

Elevator level returning method

The invention relates to an elevator level returning method; the leveling processing method can accurately determine the change of the actual position of the elevator when the elevator is waiting and to stop ,thereby achieving the elevator level returning treatment. It avoids the upper and lower limits of the collision that may occur due to the wrong direction, resulting in the safety circuit being disconnected and the elevator not functioning properly.

Constant pressure water supply no flow dormancy detection method

The invention relates to a non-flow dormancy detection method for constant pressure water supply; the dormancy detection method does not need to equipe other detection device, and the judgment is based on the current instantaneous power and the power of the inverter under the no-flow state, so that the judgment result is more accurate. At the same time, there are fewer data and steps to debug, which is convenient for users to operate.

Motor safety detection method and system and motor control system

The invention relates to a motor safety detecting method and system and a motor control system; Before the motor is started, the bus voltage is sampled between the rectifier bridge and the snubber resistor by using the snubber resistor, thereby ensuring that the subsequent bus voltage trend judgment can be more accurate and true, thereby improving the accuracy of the input phase loss detection and avoiding false positives.