Absolute value encoder signal processing device and method [invention]

The invention relates to an absolute value encoder signal processing device and a processing method thereof, comprising: a reading circuit, a pulse counting circuit, a position processing circuit, etc., and the processing process does not need to use a special FPGA chip, and the production cost is less.

Elevator operation control method [invention]

The invention relates to an elevator operation control method, which comprises: a zero-speed running current and a zero-speed running current at the start of the downlink; the elevator running control method can balance the operation quality and efficiency.

Fast rolling door control system [invention]

The invention relates to a fast rolling door control system comprising the inverter. The inverter can be electrically connected to the encoder and the motor system respectively. The encoder can measure the angular displacement of the motor in the motor system, and the inverter can determine the lower limit position according to the downlink signal, thereby improving the accuracy of the position.

Inverter and its user password encryption method [invention]

The invention relates to a inverter and a user password encryption method thereof. This method can prevent the frequency converter from being illegally copied, and improve the safety and reliability of the frequency converter when working, and at the same time improve the confidentiality of the user password.

Elevator door lock control circuit [utility model]

The invention relates to an elevator door lock control circuit, which can accurately control the opening and closing of an elevator door machine by judging whether the door lock short circuit signal is effective, thereby reducing the occurrence of a safety accident.

Elevator automatic leveling protection device [design]

The design product is used for outputting power for the elevator to run at a rescue speed to the nearest floor when the elevator is powered off, thereby enhancing the safety performance of the elevator.