Elevator Safety Fault Immediate Detection System and Method

Abstract

The invention relates to an elevator safety failure instant detection system and a method. Two sets of encoders respectively sense the rotation state of a hoist and a speed limiter to generate two comparable feedback signals. A control module converts the two feedback signals into a first displacement value and a second displacement value corresponding to the position displacement of an elevator compartment, or a first speed value and a second speed value corresponding to the displacement speed of the elevator compartment. When the difference between the first displacement value and the second displacement value is greater than a preset displacement value, or the first speed value and the second speed value are greater than a preset speed value, a control signal is output to decelerate, accelerate and park the compartment, thereby realizing the purpose of instantly detecting elevator failure and improving safety.

Description

technical field [0001] The invention relates to an elevator safety fault instant detection system and method thereof, in particular to an elevator control technology with dual-axis real-time comparison and correction, which can achieve the effect of instant fault detection. Background technique [0002] The current traction elevator is driven by the winch, so that the compartment and the counterweight are guided vertically by the respective guide rails to rise and fall. Please see figure 1 As shown, the structure of the elevator 10 includes a winch 11 , a governor (GOVERNOR) 12 and a machine room 1 . Generally speaking, the mechanical room 1 can be arranged on the distribution box, the winch 11 and the speed limiter 12 and other mechanisms, and the mechanical room 1 is mostly arranged on the top of the lifting passage of the carriage 13 . The winch 11 is then combined with the suspension type of the carriage 13 and the counterweight 14 with the steel cable 15 wound, so as ...

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Problems solved by technology

[0004] (1) Mechanical jamming or overloading, if the brake is not opened, the worm gear is stuck, the compartment 13 or the counterweight 14 is stopped due to obstacles when moving upward, and the compartment 13 is seriously overloaded when it is going up, this will cause the motor 110 to be seriously overloaded Stalling occurs, which may cause the motor 110 to be burned for a long time

[0005] (2) The motor 110 is running with a lack of phase. For example, a group of contacts of the power supply contactor of the motor 110 is broken or poorly connected, or the power supply wire is interrupted, or the terminal is in poor contact. The protector does not operate), and the motor 110 may be burned due to lack of phase operation

[0011] (1) China Taiwan Invention Announcement No. 37548 "Elevator Position Detection Method and Device", which is the same as the traditional elevator positioning method, which uses a position detector to sense the rotation state of the elevator motor and convert it into the displacement of the car The real-time position of the elevator is different from the traditional elevator positioning method only in that it sets a reference value for comparison and correction. Although it can obtain better position detection accuracy than the traditional elevator positioning, it is still a single-axis signal sense If the car or the counterweight is blocked when it is going down and the motor continues to run, the steel cables on the side where the car or the counterweight is stopped will not be stressed. According to the traction conditions of the elevator, the steel cables will inevitably appear in the groove. If the wheel slips, the steel rope will inevitably be worn out after a period of time, causing the counterweight or the carriage to fall, resulting in a major elevator safety accident

[0012] (2) China Taiwan Invention Announcement No. 284741 "Elevator Position Detection Device", which is different from the traditional elevator positioning method in that it senses the elevator speed limiter (that is, the governor) with a group of position detectors The rotating state is converted into the real-time position of the carriage displacement. Although it can obtain better position detection accuracy than traditional elevator positioning, it is still a single-axis signal sensing structure, so further real-time double comparison and confirmation cannot be done. When the position detector or governor is faulty and the transmission part of the motor is running normally, the control module will mistakenly recognize that the elevator car is in a faulty state, so it will force the motor to be shut down and the car to stop, which will cause the elevator to take a ride. inconvenience and trouble

[0013] In view of this, the known elevator equipment cannot construct a technical framework for dual-axis signal sensing, so that further real-time double comparison and confirmation cannot be performed, thereby causing major elevator industrial safety accidents. Therefore, the inventor has worked hard to develop Under this, finally developed a set of the present invention that can know the lack of elevator equipment

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