Elevator control device

Abstract

Disclosed is an elevator control device that controls a running mode of a car to include a normal running mode and a regulated running mode, and that switches the running mode to the regulated running mode when a sway index of a building exceeds a threshold value, and that switches a speed of the car to a speed lower than that in the normal running mode when a vibration index of the car exceeds a first threshold value in the regulated running mode. The elevator control device can improve the ride comfort of passengers while taking into account the running efficiency when the building is swaying.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically to an elevator control device. Background Technology

[0002] Due to the influence of wind, earthquakes, and other factors, high-rise / super high-rise buildings will vibrate, and the elevator cars and ropes installed in these buildings will also sway, which has a significant impact on the safe operation of elevators and the comfort of passengers.

[0003] Chinese patent document CN113316554B discloses a technical solution that switches the operation mode to a controlled operation mode based on the magnitude of the sway of at least one of the building and the rope and the position of the car; in the controlled operation mode, the control device switches the speed of the car to a lower speed than the speed mode of the normal operation mode at the speed change position in the middle of the travel journey.

[0004] The aforementioned existing technology has the following drawbacks: 1. In reality, the direction and frequency of building swaying may not necessarily cause the elevator car / steel cable to sway; the swaying of the steel cable may not be caused by the building swaying, so the phrase "the magnitude of swaying on either side" in the above technical solution is inappropriate. Furthermore, detecting the swaying of the steel cable is quite difficult and practically impossible to achieve. 2. The above technical solution aims to suppress steel cable swaying and car resonance, not to improve passenger comfort. Therefore, this strategy carries the risk of causing passenger anxiety. The swaying of the steel cable is related not only to the amplitude and frequency of the building swaying but also to the direction of the building swaying and the elevator car load, etc. Therefore, this invention strategy can only solve problems under certain conditions. Summary of the Invention

[0005] The technical problem this invention aims to solve is how to control the operation of the elevator car to improve passenger comfort when the building is swaying.

[0006] To solve the above-mentioned technical problems, the present invention provides an elevator control device, wherein the elevator control device controls the operation of the car in a normal operation mode and a controlled operation mode.

[0007] When the building's sway index exceeds a threshold, the elevator control device switches the operating mode to a controlled operating mode; in the controlled operating mode, when the car's vibration index exceeds a first threshold, the elevator control device switches the car's speed to a speed lower than that in the normal operating mode.

[0008] Preferably, the sway index is the sway amplitude, or a combined weighted value of the sway amplitude, sway frequency, and sway direction.

[0009] Preferably, the vibration index is the vibration amplitude, or a comprehensive weighted value of the vibration amplitude, vibration frequency, and vibration direction.

[0010] Preferably, the elevator control device records the car load, running direction, and car position when the car's vibration index exceeds a first threshold, and defines the car position by subtracting the position change ΔS of the pre-deceleration from the car position; the speed switching position corresponds to the car load and running direction; when the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the car speed to a speed lower than that in the normal operating mode.

[0011] Preferably, the positional change ΔS of the pre-deceleration is determined based on the building's sway amplitude, sway frequency, and sway direction.

[0012] Preferably, in the controlled operation mode, during the process of reducing the speed of the car, when the vibration index of the car is lower than the first threshold, the elevator control device will no longer reduce the speed of the car before stopping and decelerating.

[0013] Preferably, in the controlled operation mode, after the car speed no longer decreases, when the car vibration index reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the car vibration index is between the first threshold and the second threshold, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

[0014] Preferably, in controlled operation mode, the elevator control device performs self-learning and iteration on the speed operation curve after speed switching based on the values ​​of the building's sway index and the car's vibration index.

[0015] The present invention also provides an elevator control device, wherein the elevator control device controls the operation of the car in a normal operation mode and a controlled operation mode.

[0016] When the building's sway index exceeds a threshold, the elevator control device switches the operating mode to a controlled operating mode; in the controlled operating mode, when the vibration index of the steel wire rope head on the car side exceeds a first threshold, the elevator control device switches the car speed to a speed lower than that in the normal operating mode.

[0017] Preferably, the elevator control device records the car load, running direction, and car position when the vibration index of the wire rope end on the car side exceeds a first threshold, and defines the car position by subtracting the position change ΔS of the pre-deceleration from the car position; the speed switching position corresponds to the car load and running direction; when the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the car speed to a speed lower than the speed in the normal operating mode.

[0018] Preferably, the positional change ΔS of the pre-deceleration is determined based on the building's sway amplitude, sway frequency, and sway direction.

[0019] Preferably, in the controlled operation mode, during the process of reducing the speed of the car, when the vibration index of the wire rope head on the car side is lower than the first threshold, the elevator control device will no longer reduce the speed of the car before stopping and decelerating.

[0020] Preferably, in the controlled operation mode, after the car speed no longer decreases, when the vibration index of the wire rope head on the car side reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the vibration index of the wire rope head on the car side is between the first threshold and the second threshold, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

[0021] Compared with existing technologies, the present invention can improve passenger comfort while maintaining operational efficiency when the building is swaying. Attached Figure Description

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0023] Figure 1 This is a schematic diagram of the speed running curve of the car in Example 1 of Embodiment 1;

[0024] Figure 2 This is a schematic diagram of the speed running curve of the car in Example 2 of Embodiment 1;

[0025] Figure 3 This is a schematic diagram of the speed running curve of the car in Example 1 of Embodiment 2;

[0026] Figure 4 This is a schematic diagram of the speed running curve of the car in Example 2 of Embodiment 2;

[0027] Figure 5 This is a schematic diagram of the speed running curve of the car in Example 3; Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0029] Example 1

[0030] This embodiment provides an elevator control device. The elevator control device controls the operation of the car in two modes: a normal operation mode and a controlled operation mode. When the building's sway index exceeds a threshold, the elevator control device switches the operation mode to the controlled operation mode. In the controlled operation mode, when the car's vibration index exceeds a first threshold, the elevator control device switches the car's speed to a speed lower than that in the normal operation mode.

[0031] The sway index of a building is obtained by sway detection equipment installed on the building. The basic sway index can be the sway amplitude, and preferably it is a comprehensive weighted value of sway amplitude, sway frequency and sway direction.

[0032] The vibration index of the car is obtained by vibration detection equipment installed on the car. The basic vibration index is the vibration amplitude, and preferably it is a comprehensive weighted value of vibration amplitude, vibration frequency and vibration direction.

[0033] The specific speed curve of the elevator control device controlling the car is as follows: Figure 1 As shown, the vibration index is taken as an example, specifically the vibration amplitude (i.e., car amplitude). Under normal operating conditions, the elevator control device uses... Figure 1 The speed curve shown by the black dashed line controls the car's speed, where V1 is the car's rated speed.

[0034] When the building's sway index exceeds the threshold, the elevator control device switches the operating mode to controlled operation mode. Figure 1The speed curve, shown by the solid black line, controls the car's movement. It should be noted that the speed curve in controlled operation mode is related to the car's vibration index and position. If the car's vibration index does not exceed the first threshold in controlled operation mode, the speed curve in controlled operation mode is actually the same as the speed curve in normal operation mode. Figure 1 The solid black line in the middle shows the speed operating curve when the car's vibration index exceeds the first threshold. In this embodiment, even in controlled operation mode, the car will not reduce speed if the vibration index does not exceed the limit, thus balancing passenger comfort and operational efficiency.

[0035] Figure 1 The blue curve represents the measured vibration index of the elevator car during operation. When the vibration index exceeds the first threshold, the elevator control device switches the car speed to a speed lower than the normal operating speed. Figure 1 The speed curve is shown by the solid black line. When the car's vibration index exceeds a first threshold, the elevator control device first reduces the car speed with a larger first deceleration. Once the car's vibration index falls below the first threshold, the elevator control device calculates a smaller second deceleration based on the floor the car is stopping at, causing the car to stop at the floor level. Preferably, once the car's vibration index falls below the first threshold, the elevator control device no longer reduces the car speed before stopping and decelerating. Figure 2 As shown.

[0036] Preferably, in controlled operation mode, the elevator control device can perform self-learning and iteration on the speed operation curve after speed switching based on the values ​​of the building's sway index and the car's vibration index. This allows it to find an optimal first deceleration and predict a maintenance speed V2 that will keep the car's vibration index below a first threshold.

[0037] Example 2

[0038] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, after reducing the speed, the speed is not increased again in order to further improve operating efficiency while maintaining acceptable comfort. In this embodiment, under the controlled operation mode, after the car speed no longer decreases, when the car's vibration index reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the car's vibration index is between the first and second thresholds, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

[0039] like Figure 3As shown in the speed operation curve, when the car speed decreases to speed V2, the car vibration index gradually decreases. When the car vibration index reaches the second threshold, the elevator control device increases the car speed so that the car vibration index is between the first threshold and the second threshold.

[0040] like Figure 4 The speed operation curve shown indicates that when the elevator control device increases the car speed, if the building sway index decreases but the car vibration index does not increase significantly, the speed can be increased to the rated speed.

[0041] During the implementation of the speed reduction strategy, the sway index of the building, the vibration index of the car, and the positional load of the car are recorded and calculated in real time to select and adjust the corresponding speed curve, taking into account both passenger comfort and operating efficiency.

[0042] Example 3

[0043] In Examples 1 and 2, the adjustment of the speed operating curve is triggered solely by whether the car's vibration index exceeds a first threshold. This triggering is relatively delayed; by the time the speed is reduced, the car's vibration index has already deteriorated, causing temporary discomfort to passengers.

[0044] This embodiment adds a trigger-based speed reduction adjustment mode. The elevator control device records the car load, running direction, and car position when the car's vibration index exceeds a first threshold, and defines the speed switching position by subtracting the pre-speed reduction position change ΔS from the car position. The speed switching position corresponds to the car's load and running direction. When the car reaches the speed switching position corresponding to the load and running direction, the elevator control device switches the car's speed to a speed lower than the normal operating mode. The pre-speed reduction position change ΔS is determined based on the building's sway amplitude, sway frequency, and sway direction. Figure 5 As shown, the car position when the vibration index of the car exceeds the first threshold is point A. By subtracting the position change ΔS of the pre-deceleration, the car can trigger deceleration when the car with the same car load and running direction runs to point B next time. The green double-dotted line is the speed running curve after the deceleration is triggered.

[0045] The principle behind the above-mentioned speed reduction adjustment mode is as follows:

[0046] When a building sways, the direction of sway Vd, the amplitude of sway Va, and the frequency of sway Vf all affect the comfort of the elevator. Therefore, the comfort function is: Z = Fa(V, S, L, Vd, Va, Vf), where V is the elevator car speed, S is the elevator car position, and L is the car load.

[0047] Vd, Va, and Vf affect the adjustment range and speed of V. Maintaining the adjustment effect of V while the building remains stable is clearly impossible; therefore, it is necessary to reduce the speed in advance based on the elevator car's position. That is, Vd, Va, and Vf correspond to the position of the advance speed reduction, i.e., the change in position of the advance speed reduction ΔS = G(Vd, Va, Vf).

[0048] ΔS can be evaluated based on the influence of Vd, Va, and Vf on elevator car vibration. Specifically, during elevator operation, a three-factor, three-level orthogonal experimental method is used to confirm the influence of Vd, Va, and Vf on elevator car vibration. The greater the influence, the larger the value of ΔS should be.

[0049] By detecting the vibration data of the elevator car during the deceleration control process under building sway (Vd, Va, Vf), the advance distance ΔS for the start of deceleration under this condition is confirmed.

[0050] By controlling the range of elevator car comfort (car vibration amplitude and vibration frequency), continuously iterating and compressing the advance distance ΔS for the start of deceleration and the range of deceleration, and increasing the range of speed recovery, the elevator operation can balance comfort and efficiency.

[0051] Example 4

[0052] This embodiment extends the technical solutions of Embodiment 1, Embodiment 2, or Embodiment 3 to the suppression and control of wire rope vibration. The vibration detection device is installed on the fixed rope head side of the wire rope on the elevator car side.

[0053] The elevator control device controls the operation of the car in two modes: normal operation mode and controlled operation mode. When the building's sway index exceeds a threshold, the elevator control device switches the operation mode to controlled operation mode. In the controlled operation mode, when the vibration index of the wire rope head on the car side exceeds a first threshold, the elevator control device switches the car speed to a speed lower than that in the normal operation mode.

[0054] Preferably, in the controlled operation mode, during the process of reducing the speed of the car, when the vibration index of the wire rope head on the car side is lower than the first threshold, the elevator control device will no longer reduce the speed of the car before stopping and decelerating.

[0055] Preferably, in the controlled operation mode, after the car speed no longer decreases, when the vibration index of the wire rope head on the car side reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the vibration index of the wire rope head on the car side is between the first threshold and the second threshold, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

[0056] Preferably, the elevator control device records the car load, running direction, and car position when the vibration index of the wire rope end on the car side exceeds a first threshold, and defines the car position by subtracting the position change ΔS of the pre-deceleration from the car position; the speed switching position corresponds to the car load and running direction; when the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the car speed to a speed lower than the speed in the normal operating mode.

[0057] Preferably, the positional change ΔS of the pre-deceleration is determined based on the building's sway amplitude, sway frequency, and sway direction.

[0058] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. An elevator control device, characterized in that, The elevator control device controls the operation of the car in two modes: normal operation mode and controlled operation mode. When the building's sway index exceeds a threshold, the elevator control device switches the operating mode to a controlled operating mode; in the controlled operating mode, when the car's vibration index exceeds a first threshold, the elevator control device switches the car's speed to a speed lower than that in the normal operating mode. The elevator control device records the car load, running direction, and car position when the car's vibration index exceeds a first threshold, and defines the speed switching position by subtracting the position change ΔS of the car position from the pre-deceleration position. The speed switching position corresponds to the car's load and running direction. When the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the car's speed to a speed lower than the speed in the normal operating mode. The positional change ΔS of the pre-deceleration is determined based on the building's sway amplitude, sway frequency, and sway direction.

2. The elevator control device according to claim 1, characterized in that, The sway index is the sway amplitude, or a combined weighted value of sway amplitude, sway frequency, and sway direction.

3. The elevator control device according to claim 1, characterized in that, The vibration index is the vibration amplitude, or a combined weighted value of vibration amplitude, vibration frequency, and vibration direction.

4. The elevator control device according to claim 1, characterized in that, In the controlled operation mode, during the process of car speed reduction, when the car's vibration index is lower than the first threshold, the elevator control device will no longer reduce the car's speed before stopping and decelerating.

5. The elevator control device according to claim 4, characterized in that, In the controlled operation mode, after the car speed no longer decreases, when the car vibration index reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the car vibration index is between the first threshold and the second threshold, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

6. The elevator control device according to claim 1, characterized in that, In controlled operation mode, the elevator control device performs self-learning and iteration on the speed operation curve after speed switching based on the values ​​of the building's sway index and the car's vibration index.

7. An elevator control device, characterized in that, The elevator control device controls the operation of the car in two modes: normal operation mode and controlled operation mode. When the building's sway index exceeds the threshold, the elevator control device switches the operating mode to controlled operating mode. In the controlled operation mode, when the vibration index of the wire rope head on the car side exceeds the first threshold, the elevator control device switches the car speed to a speed lower than that in the normal operation mode. The elevator control device records the car load, running direction, and car position when the vibration index of the wire rope end on the car side exceeds the first threshold. The car position is then subtracted from the position change ΔS of the pre-deceleration, and the result is defined as the speed switching position. The speed switching position corresponds to the car load and running direction. When the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the car speed to a speed lower than that in the normal operating mode. The positional change ΔS of the pre-deceleration is determined based on the building's sway amplitude, sway frequency, and sway direction.

8. The elevator control device according to claim 7, characterized in that, In the controlled operation mode, during the process of car speed reduction, when the vibration index of the steel wire rope head on the car side is lower than the first threshold, the elevator control device will no longer reduce the car speed before stopping and decelerating.

9. The elevator control device according to claim 8, characterized in that, In the controlled operation mode, after the car speed no longer decreases, when the vibration index of the wire rope head on the car side reaches or falls below the second threshold, the elevator control device increases the car speed before stopping and decelerating, so that the vibration index of the wire rope head on the car side is between the first threshold and the second threshold, and the increased speed is not greater than the speed in the normal operation mode; the second threshold is less than the first threshold.

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