CN115258857B - An elevator starting compensation method - Google Patents

Abstract

The invention discloses an elevator starting compensation method, which comprises an induction part, a decision part and an execution part, wherein the induction part is used for acquiring the real-time braking force sampling number; a sensor is arranged on each group of mechanical parts of the brake; each group of sensors gathers data to a data preprocessing part and synthesizes the real-time braking force sampling number; before the elevator is started, the decision part calculates the corresponding braking force sampling number when the braking force is counteracted by the traction machine output force according to the current elevator information, and determines the braking force sampling number as a braking force reference value; the executing part controls the output force of the traction machine, takes the real-time braking force sampling number as feedback to form closed-loop control, and stabilizes the real-time braking force sampling number on a braking force reference value; and maintaining stable output after the traction machine output just counteracts the braking force, and starting the elevator by loosening a brake. When the elevator is stationary and the brake is not opened, the invention accurately judges and controls the traction machine to output force to accurately counteract the gravity deviation of the system, so that the elevator car is stabilized at the starting position, thereby realizing the vibration-free starting and improving the comfort of riding the elevator.

Description

An elevator starting compensation method

Technical field

The present invention relates to the technical field of elevators, and in particular to an elevator starting compensation method.

Background technique

With the continuous development of urbanization, the number of elevators is increasing day by day. People have higher and higher requirements for elevators. In addition to safety and elevator quality, they also put forward more and more requirements for the comfort of riding elevators. In the daily use of elevators, most of the bad feelings about riding in the elevator appear at the moment when the elevator starts or brakes. The frustration is obvious, so that some people may feel dizzy, stand unsteadily, etc. Before the existing elevator starts and opens the brake, the traction machine is given a predicted starting compensation torque based on the weighing data in order to stabilize the car. If the predicted starting compensation torque is inconsistent with the actual demand and the elevator deflects, the control system will quickly adjust the torque based on the actual rotation of the traction sheave to re-stabilize the car.

The starting compensation plan is determined by car weighing technology. Due to data deviation or imbalance of elevator system mass compensation when the car is at different heights, it cannot be accurately judged whether the predicted starting compensation torque is consistent with the actual demand before releasing the brake. consistent. It may be that at the moment of starting, the traction wheel deflects abnormally due to inaccurate starting compensation, affecting comfort.

Contents of the invention

The purpose of the present invention is to provide an elevator starting compensation method that can improve the comfort of riding an elevator and provide a good user experience.

The present invention is achieved through the following technical solutions:

An elevator starting compensation method includes a sensing part, a decision-making part and an execution part, which includes the following steps:

Step S1. The sensing part is composed of a sensor and a data preprocessing part, which is used to obtain the real-time braking force sampling number; when the brake is braking, there is an interaction force between the brake and the traction wheel. When the traction machine output force and the gravity of the elevator system are When the resultant force changes, the component of the brake force in the direction of rotation of the traction wheel will also change; a sensor is provided on each set of brake mechanical components to quantify the braking force of each set of brakes in the direction of rotation of the traction wheel. and direction;

Step S2: The sensing part detects the real-time braking force sampling number through the following methods; Method A: Sensors provided on each set of brake mechanical components detect the interaction force between the brake pads and the brake pad fixing parts of the brake; Method B: Or detect The interaction force between the brake and the brake fixture of the traction machine, mode C: or detecting the deformation of the brake fixture; quantifying the magnitude and direction of the braking force of the brake in the direction of rotation of the traction wheel; each group of sensors summarizes the data Go to the data preprocessing department to synthesize the real-time braking force sampling number;

Step S3: When the gravity of the elevator car and other mechanical components is offset by the output force of the traction machine, the braking force provided by the brake to the system is zero, and the braking force sampling number at this time is the braking force reference value; the decision-making department determines the braking force during the daily operation of the elevator. , learn how to determine the braking force reference value;

Step S4. In the late-night elevator idle mode, when the car stops at the target floor and does not run for half an hour after closing the door, it can be confirmed that the car is unloaded; at the same time, according to method A or method B or method in step S3 The data obtained by C is used as basic data; using the basic data, when the elevator frequently operates during the day, real-time corrections are made to the detection data of method A in step S2, that is, the timeliness and reliability of the detection data are achieved;

Step S5: Before the elevator starts, the decision-making department calculates the corresponding number of braking force samples when the braking force is offset by the traction machine output based on the current elevator information, and sets it as the braking force reference value;

Step S6: The execution part controls the output of the traction machine, and uses the real-time braking force sampling number as feedback to form a closed-loop control to stabilize the real-time braking force sampling number at the braking force reference value;

Step S7: After the output force of the traction machine just offsets the braking force and maintains a stable output, the elevator releases the brake and starts.

Furthermore, in step S2, the data detected by mode B or mode C can be corrected in real time to the data detected by mode A.

Beneficial effects of the present invention:

In the technical solution of the present invention, when the elevator is stationary before starting and the brake is not released, the traction machine output force is adjusted according to the real-time braking force sampling value measured by the sensor on the brake through closed-loop control, so that the traction machine output force just offsets the system weight deviation. , accurately provides starting compensation and achieves stable starting of the elevator. By measuring the magnitude and direction of the braking force of each set of brakes in the direction of rotation of the traction wheel, the real-time braking force sampling value is obtained through processing, and the system weight deviation can be accurately judged. Through the interaction force between the brake and the brake fixing part of the traction machine recorded in the elevator's idle mode, or the deformation data of the brake fixing part and the brake pad and the brake pad fixing part of the brake detected when the elevator is running frequently. The method of real-time correction of the interaction force is to learn the braking force reference value corresponding to when the braking force provided by the system is offset by the output force of the traction machine, and correct the zero point of the real-time braking force sampling value. When the elevator is stationary and the brake is not opened, the invention has accurately judged and controlled the traction machine output to accurately offset the system gravity deviation, stabilize the car at the starting position, achieve vibration-free starting, and improve the comfort of riding the elevator. Compared with common car weighing solutions, measuring at the brake position can determine the system weight deviation more directly and accurately.

Description of drawings

Figure 1 is a schematic diagram of the overall flow of the elevator starting compensation method according to the embodiment of the present invention;

Figure 2 is a schematic diagram of the interaction between the brake and the traction wheel according to the embodiment of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Here, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. Here, the schematic embodiments and descriptions of the present invention will be used. to explain the present invention, but not as a limitation to the present invention.

It should be noted that descriptions such as "first" and "second" in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions in various embodiments can be combined with each other, but it must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such a combination of technical solutions does not exist. , nor within the protection scope required by the present invention.

In the present invention, unless otherwise expressly stipulated and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, or a mechanical connection. It can be an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Referring to Figures 1 and 2, an elevator starting compensation method includes a sensing part, a decision-making part and an execution part, including the following steps:

Step S1. The sensing part is composed of a sensor and a data preprocessing part, which is used to obtain the real-time braking force sampling number; when the brake is braking, there is an interaction force between the brake and the traction wheel. When the traction machine output force and the gravity of the elevator system are When the resultant force changes, the component of the brake force in the direction of rotation of the traction wheel will also change; a sensor is provided on each set of brake mechanical components to quantify the braking force of each set of brakes in the direction of rotation of the traction wheel. and direction;

Step S2: The sensing part detects the real-time braking force sampling number through the following methods; Method A: Sensors provided on each set of brake mechanical components detect the interaction force between the brake pads and the brake pad fixing parts of the brake; Method B: Or detect The interaction force between the brake and the brake fixture of the traction machine, mode C: or detecting the deformation of the brake fixture; quantifying the magnitude and direction of the braking force of the brake in the direction of rotation of the traction wheel; each group of sensors summarizes the data Go to the data preprocessing department to synthesize the real-time braking force sampling number;

Step S3: When the gravity of the elevator car and other mechanical components is offset by the output force of the traction machine, the braking force provided by the brake to the system is zero, and the braking force sampling number at this time is the braking force reference value; the decision-making department determines the braking force during the daily operation of the elevator. , learn how to determine the braking force reference value;

Step S4. In the late-night elevator idle mode, when the car stops at the target floor and does not run for half an hour after closing the door, it can be confirmed that the car is unloaded; at the same time, according to method A or method B or method in step S3 The data obtained by C is used as basic data; using the basic data, when the elevator frequently operates during the day, real-time corrections are made to the detection data of method A in step S2, that is, the timeliness and reliability of the detection data are achieved;

Step S5: Before the elevator starts, the decision-making department calculates the corresponding number of braking force samples when the braking force is offset by the traction machine output based on the current elevator information, and sets it as the braking force reference value;

Step S6: The execution part controls the output of the traction machine, and uses the real-time braking force sampling number as feedback to form a closed-loop control to stabilize the real-time braking force sampling number at the braking force reference value;

Step S7: After the output force of the traction machine just offsets the braking force and maintains a stable output, the elevator releases the brake and starts.

Specifically, in this embodiment, method A in step 3 is the most direct and has the fastest data response. However, since the brake pads and the brake pad fixing parts of the brake are frequently-acting components, as the number of actions increases, the detection data It will also change accordingly. The data detected by method B and method C in step 3 have the remarkable feature of being stable. The data detected by method B and method C in step 3 can be corrected in real time to the data detected by method A in step 3.

In the elevator starting compensation method provided by the present invention, when the elevator is stationary before starting and the brake is not released, the traction machine output force is adjusted through closed-loop control based on the real-time braking force sampling value measured by the sensor on the brake, so that the traction machine output force just offsets the The system weight deviation accurately provides starting compensation to achieve stable starting of the elevator. By measuring the magnitude and direction of the braking force of each set of brakes in the direction of rotation of the traction wheel, the real-time braking force sampling value is obtained through processing, and the system weight deviation can be accurately judged. Through the interaction force between the brake and the brake fixing part of the traction machine recorded in the elevator's idle mode, or the deformation data of the brake fixing part and the brake pad and the brake pad fixing part of the brake detected when the elevator is running frequently. The method of real-time correction of the interaction force is to learn the braking force reference value corresponding to when the braking force provided by the system is offset by the output force of the traction machine, and correct the zero point of the real-time braking force sampling value.

Compared with the existing technology, when the elevator is stationary and the brake is not opened, the present invention has accurately judged and controlled the traction machine output to accurately offset the system gravity deviation, stabilize the car at the starting position, and realize vibration-free starting and lifting of the elevator. comfort. Compared with common car weighing solutions, measuring at the brake position can determine the system weight deviation more directly and accurately.

The technical solutions provided by the embodiments of the present invention have been introduced in detail above. This article uses specific examples to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the embodiments of the present invention. Principle; at the same time, for those of ordinary skill in the art, there will be changes in the specific implementation and application scope according to the embodiments of the present invention. In summary, the content of this description should not be understood as a limitation of the present invention.

Claims (2)

1. The elevator starting compensation method comprises an induction part, a decision part and an execution part and is characterized by comprising the following steps:

step S1, an induction part consists of a sensor and a data preprocessing part and is used for acquiring the real-time braking force sampling number; when the brake brakes, interaction force exists between the brake and the traction sheave, and when the resultant force of the traction machine output force and the gravity of the elevator system changes, the component of the brake force in the direction of the traction sheave rotation also changes; a sensor is arranged on each group of mechanical parts of the brake to quantify the braking force and the braking force of each group of the brake in the direction of the traction wheel rotation;

s2, detecting the real-time braking force sampling number by the sensing part in the following way; mode a: a sensor arranged on each group of mechanical parts of the brake detects the interaction force between the brake pad and the brake pad fixing piece of the brake; or mode B: detecting the interaction force between the brake and the brake fixing member of the traction machine, or the mode C: detecting deformation of the brake mount; quantifying the magnitude and direction of the braking force of the brake in the direction of the traction wheel rotation; each group of sensors gathers data to a data preprocessing part and synthesizes the real-time braking force sampling number;

s3, when the gravity of the elevator car and other mechanical parts is counteracted by the output of the traction machine, the braking force provided by the brake to the system is zero, and the sampling number of the braking force at the moment is a braking force reference value; the decision part learns how to determine the braking force reference value in the daily operation of the elevator;

step S4, in the late night elevator idle running mode, when the car stops at a target floor and is not operated for half an hour continuously after the car is closed, the car can be confirmed to be idle; meanwhile, the data acquired in the mode A, the mode B or the mode C in the step S3 are used as basic data; utilizing the basic data to make real-time correction on the detection data of the mode A in the step S2 when the daytime elevator frequently runs so as to realize timeliness and reliability of the detection data;

step S5, before the elevator is started, the decision part calculates the corresponding braking force sampling number when the braking force is counteracted by the traction machine output force according to the current elevator information, and the braking force sampling number is determined as a braking force reference value;

s6, the executing part controls the output force of the traction machine, and the real-time braking force sampling number is used as feedback to form closed-loop control, so that the real-time braking force sampling number is stabilized at a braking force reference value;

and S7, maintaining stable output after the output of the traction machine just counteracts the braking force, and starting the elevator by releasing a brake.

2. An elevator start-up compensation method according to claim 1, characterized in that: in the step S2, the data detected in the mode B or the mode C may be corrected in real time.