Coding positioning system and control method for elevator car

Abstract

An elevator carriage positioning and encoding system and control method. The positioning and encoding system comprises a single elevator control system (1), carriage control system (2), an encoding cable system (3), and a group control system (4). A sensing antenna container (3-2) on the carriage transmits a signal generated by an encoded address generator and having a specific frequency to an encoding cable (3-5) via electromagnetic coupling. The signal is transmitted over the encoding cable (3-5) arranged and intertwisted according to a gray code to provide an encoded address signal. An encoded address receiver is configured to receive the encoded address signal and decode the same. The positioning system employs the encoding cable system to implement various functions such as carriage positioning, operation speed monitoring, leveling control, rope-free speed limit protection, anti-carriage slipping protection, anti-cutting protection and terminal position limiting protection.

Description

technical field [0001] The invention relates to the field of elevators, in particular to an elevator car coded positioning system, which is especially suitable for high-speed, ultra-high-speed and long-travel elevators in underground ultra-deep mines and super-high buildings on the ground. Background technique [0002] With the continuous improvement of people's pursuit of quality of life, the requirements for elevators are getting higher and higher. On the premise of ensuring the safety of elevators, users pursue more convenient and efficient elevator rides. On the premise of meeting the needs of users, designers pursue simpler and more reliable elevator systems. In order to ensure the safe operation of the elevator, the elevator control system incorporates the car positioning system, running speed monitoring system, leveling control system, speed limiting system, anti-rolling protection system, anti-shear protection system and terminal limit protection system. In the exi...

AI Technical Summary

Problems solved by technology

Since the value of this positioning system is obtained through conversion, and due to the existence of gear backlash and relative slip between belts, this positioning method has a certain cumulative error.

[0004] The traditional elevator leveling control mostly adopts the joint control of the photoelectric switch installed on the target landing and the rotary encoder installed on the main shaft of the traction machine. This method can only achieve deceleration according to the speed principle. When the car reaches the target landing, the photoelectric switch is blocked. , the traction machine brake brakes, the speed of the car suddenly becomes zero, and the resulting braking acceleration makes passengers uncomfortable; the traditional speed limiting system includes a speed limiter, a safety gear, a speed limit rope and a tensioning device. In the system, the speed limit rope shakes, which can easily cause the safety gear to malfunction; most of the traditional anti-rolling protection systems and anti-shearing protection systems use photoelectric switches. In the extreme situation where the traction rope slips in the rope groove of the traction wheel and the car moves, and the speed of the car does not reach the mechanical action speed, the traditional system cannot trigger the action of the safety gear, and cannot realize anti-rolling and anti-shearing Protection; the terminal limit protection system uses a limit switch, and when the car reaches the top or the bottom of the pier at a relatively high speed, the limit switch is triggered, and the safety gear acts immediately to make the car stop suddenly, resulting in a large braking acceleration, which is harmful to passengers. Great damage; in summary, the existing above-mentioned systems all use independent sensors, the system is complicated and the control is cumbersome, which may easily cause system failure and affect the safety performance of the elevator

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