Elevator control device

Abstract

The invention discloses an elevator control device. Operation modes of the elevator control device for controlling operation of an elevator car comprise a normal operation mode and a control operation mode. When the shaking index of the building exceeds a threshold value, the elevator control device switches the operation mode to a control operation mode; in the control operation mode, when the vibration index of the elevator car exceeds a first threshold value, the elevator control device switches the speed of the elevator car to be lower than the speed in the normal operation mode. When the building shakes, the riding comfort of passengers can be improved, and the operation efficiency is considered.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator control device. Background Art

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

[0003] Chinese patent document CN113316554B discloses a technical solution, which switches the operation mode to a controlled operation mode according to the degree of shaking of at least any 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 speed lower than that of the normal operation mode at a speed change position midway through the travel.

[0004] The above-mentioned prior art has the following defects: 1. In reality, the direction and frequency of the building shaking may not necessarily cause the elevator car / wire rope to shake; the shaking of the wire rope may not be caused by the shaking of the building, so the term "the shaking size of either party" in the above-mentioned technical solution is inappropriate. It is also relatively difficult to detect the shaking of the wire, and it is also relatively difficult to achieve in the actual implementation process. 2. The above-mentioned technical solution aims to suppress the shaking of the wire rope and the resonance of the car, not the riding comfort of the elevator passengers, so under this strategy, there is a risk of passengers becoming uneasy. The shaking of the wire rope is not only related to the shaking amplitude and frequency of the building, but also to the direction of the building shaking, the elevator car load, etc., so according to the invention strategy, only problems under some conditions can be solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to control the operation of the elevator car to improve the riding comfort of passengers when the building is shaking.

[0006] In order to solve the above technical problems, the present invention provides an elevator control device, wherein the operation mode of the elevator control device controlling the operation of the car includes a normal operation mode and a controlled operation mode;

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

[0008] Preferably, the shake index is the shake amplitude, or a comprehensive weight value of the shake amplitude, the shake frequency and the shake direction.

[0009] Preferably, the vibration index is a vibration amplitude, or a comprehensive weight 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 vibration index of the car exceeds the first threshold value, and defines the car position minus the position change ΔS caused by the early deceleration as the speed switching position; the speed switching position has a corresponding relationship with 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 operation mode.

[0011] Preferably, the position change amount ΔS of the early deceleration is determined according to the sway amplitude, sway frequency and sway direction of the building.

[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 a first threshold, the elevator control device no longer reduces the speed of the car before stopping and decelerating.

[0013] Preferably, in the controlled operation mode, after the speed of the car no longer decreases, when the vibration index of the car reaches or falls below a second threshold, the elevator control device increases the speed of the car before decelerating at the stop, so that the vibration index of the car 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 the control operation mode, the elevator control device performs self-learning and iteration on the speed operation curve after speed switching according to the values ​​of the building sway index and the car vibration index.

[0015] The present invention also provides an elevator control device, wherein the operation mode of the elevator control device controlling the operation of the car includes a normal operation mode and a controlled operation mode;

[0016] When the building's shaking index exceeds a threshold, the elevator control device switches the operation mode to a controlled operation mode; in the controlled operation mode, when the vibration index of the wire rope end on the car side exceeds a first threshold, the elevator control device switches the car's speed to a speed lower than that in the normal operation 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 the first threshold value, and defines the car position minus the position change ΔS caused by the early deceleration as the speed switching position; the speed switching position has a corresponding relationship with 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 operation mode.

[0018] Preferably, the position change amount ΔS of the early deceleration is determined according to the sway amplitude, sway frequency and sway direction of the building.

[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 speed of the car no longer decreases, when the vibration index of the wire rope end on the car side reaches or falls below the second threshold, the elevator control device increases the speed of the car before stopping and decelerating, so that the vibration index of the wire rope end 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 the prior art, the present invention can improve the riding comfort of passengers and take into account the operating efficiency when the building shakes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

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

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

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

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

[0027] Figure 5 Schematic diagram of the speed operation curve of the car in Example 3; DETAILED DESCRIPTION

[0028] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described 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 specific embodiments to those skilled in the art.

[0029] Example 1

[0030] The present embodiment provides an elevator control device, which controls the operation modes of the car including a normal operation mode and a controlled operation mode; when the shaking index of the building exceeds a threshold value, the elevator control device switches the operation mode to a controlled operation mode; in the controlled operation mode, when the vibration index of the car exceeds a first threshold value, the elevator control device switches the speed of the car to a speed lower than that in the normal operation mode.

[0031] The shaking index of the building is obtained by setting a shaking detection device on the building. The basic shaking index may be the shaking amplitude, preferably the comprehensive weight value of the shaking amplitude, shaking frequency and shaking direction.

[0032] The vibration index of the car is obtained by a vibration detection device arranged on the car. The basic vibration index is the vibration amplitude, preferably a comprehensive weight value of the vibration amplitude, vibration frequency and vibration direction.

[0033] The specific elevator control device controls the speed operation curve of the car as follows Figure 1 As shown in the figure, the vibration index is taken as an example of vibration amplitude (i.e., car amplitude). In the normal operation mode, the elevator control device is based on Figure 1 The speed operation curve shown by the black dotted line in the middle controls the car, where V1 is the rated speed of the car.

[0034] When the building shaking index exceeds the threshold, the elevator control device switches the operation mode to the controlled operation mode. Figure 1The speed operation curve shown by the black solid line in the middle controls the car. It should be noted that the speed operation curve in the controlled operation mode is related to the vibration index of the car and the position of the car. If the vibration index of the car in the controlled operation mode does not exceed the first threshold, the speed operation curve in the controlled operation mode is actually the same as the speed operation curve in the normal operation mode. Figure 1 The black solid line in the middle shows the speed operation curve when the vibration index of the car exceeds the first threshold. Even in the control operation mode, if the vibration index of the car does not exceed the standard, the speed will not be reduced, so this embodiment can take into account both passenger comfort and operation efficiency.

[0035] Figure 1 The blue curve in the figure represents the measured car vibration index during car operation. When the car vibration index exceeds the first threshold, the elevator control device switches the car speed to a speed lower than that in the normal operation mode, such as Figure 1 The speed operation curve is shown in the black solid line. When the vibration index of the car exceeds the first threshold, the elevator control device first reduces the car speed with a larger first deceleration. When the car vibration index is lower than the first threshold, the elevator control device calculates a smaller second deceleration according to the car stop floor, so that the car stops at the stop floor. Preferably, when the car vibration index is lower than the first threshold, the elevator control device no longer reduces the car speed before stopping and decelerating, such as Figure 2 shown.

[0036] Preferably, the elevator control device can perform self-learning and iteration on the speed operation curve after speed switching according to the values ​​of the building shaking index and the car vibration index in the control operation mode, and find the best first deceleration and predict the maintenance speed V2 that can make the car vibration index lower than the first threshold.

[0037] Example 2

[0038] The difference between this embodiment and embodiment 1 is that after reducing the speed, embodiment 1 will not increase the speed again, in order to further improve the operating efficiency under the premise of acceptable comfort. In the control operation mode, after the speed of the car is no longer reduced, when the vibration index of the car reaches or falls below the second threshold, the elevator control device of this embodiment increases the speed of the car before stopping and decelerating, so that the vibration index of the car 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.

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

[0040] like Figure 4 As shown in the speed operation curve, when the elevator control device increases the speed of the car, if the building's sway index value decreases and the car's vibration index value does not increase significantly, the speed can be increased to the rated speed.

[0041] During the implementation of the speed reduction strategy, the building's sway index, the car's vibration index, and the car's position load 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] The adjustment of the speed operation curve in Embodiment 1 and Embodiment 2 is triggered only by whether the vibration index of the car exceeds the first threshold. This triggering is relatively delayed. When the car is running at a reduced speed, the vibration index of the car has deteriorated, which will cause temporary discomfort to passengers.

[0044] This embodiment adds an adjustment mode for triggering speed reduction. The elevator control device records the car load, running direction and car position when the vibration index of the car exceeds the first threshold, and defines the car position minus the position change ΔS due to early speed reduction as the speed switching position; the speed switching position has a corresponding relationship with 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 operation mode. The position change ΔS due to early speed reduction is determined according to the sway amplitude, sway frequency and sway direction of the building. Figure 5 As shown, the car position previously recorded when the vibration index of the car exceeds the first threshold is point A. By subtracting the position change ΔS of the advance deceleration, the next time the car with the same car load and running direction runs to point B, the deceleration can be triggered. The green double-dotted line is the speed operation curve after the deceleration is triggered.

[0045] The principle of the above adjustment mode for triggering speed reduction is as follows:

[0046] When the building shakes, the shaking direction Vd, shaking amplitude Va, and shaking frequency Vf of the building will all affect the comfort of the elevator, so the comfort function is: Z = Fa(V, S, L, Vd, Va, Vf), V is the elevator car speed, S is the elevator car position, and L is the car load.

[0047] Vd, Va, and Vf will affect the adjustment range and speed of V. It is obviously impossible to maintain the adjustment effect of V when the building is not shaking, so it is necessary to slow down in advance according to the position of the elevator car. That is, Vd, Va, Vf and the position of the advance speed reduction form a corresponding relationship, that is, the position change 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 the vibration of the elevator car. That is, during the operation of the elevator, the influence of Vd, Va, and Vf on the vibration of the elevator car is confirmed by a 3-factor 3-level orthogonal test method. The greater the influence, the larger the ΔS value is set.

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

[0050] By controlling the range of elevator car comfort (car vibration amplitude, vibration frequency), continuously and iteratively compressing the advance distance ΔS for the start of speed reduction and the range of speed reduction, the range of speed recovery is increased, so that the elevator operation takes into account both comfort and efficiency.

[0051] Example 4

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

[0053] The operation modes of the elevator control device for controlling the operation of the car include a normal operation mode and a controlled operation mode; when the sway index of the building exceeds a threshold value, the elevator control device switches the operation mode to a controlled operation mode; in the controlled operation mode, when the vibration index of the wire rope end on the car side exceeds a first threshold value, the elevator control device switches the speed of the car 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 speed of the car no longer decreases, when the vibration index of the wire rope end on the car side reaches or falls below the second threshold, the elevator control device increases the speed of the car before stopping and decelerating, so that the vibration index of the wire rope end 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 the first threshold value, and defines the car position minus the position change ΔS caused by the early deceleration as the speed switching position; the speed switching position has a corresponding relationship with 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 operation mode.

[0057] Preferably, the position change amount ΔS of the early deceleration is determined according to the sway amplitude, sway frequency and sway direction of the building.

[0058] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An elevator control device, characterized in that: The operation modes of the elevator control device controlling the operation of the car include a normal operation mode and a controlled operation mode; When the shaking index of the building exceeds a threshold, the elevator control device switches the operation mode to a controlled operation mode; in the controlled operation mode, when the vibration index of the car exceeds a first threshold, the elevator control device switches the speed of the car to a speed lower than that in the normal operation mode.

2. The elevator control device according to claim 1, characterized in that: The shaking index is the shaking amplitude, or a comprehensive weight value of the shaking amplitude, the shaking frequency and the shaking direction.

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

4. The elevator control device according to claim 1, characterized in that: The elevator control device records the car load, running direction and car position when the vibration index of the car exceeds the first threshold, and defines the car position minus the position change ΔS of the early deceleration as the speed switching position; the speed switching position has a corresponding relationship with 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 operation mode.

5. The elevator control device according to claim 4, characterized in that: The position change amount ΔS of the early deceleration is determined according to the sway amplitude, sway frequency and sway direction of the building.

6. The elevator control device according to claim 1 or 4, characterized in that: 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.

7. The elevator control device according to claim 6, characterized in that: In the controlled operation mode, after the speed of the car no longer decreases, when the vibration index of the car reaches or falls below a second threshold, the elevator control device increases the speed of the car before decelerating at the stop, so that the vibration index of the car 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.

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

9. An elevator control device, characterized in that: The operation modes of the elevator control device controlling the operation of the car include a normal operation mode and a controlled operation mode; When the sway index of the building exceeds a threshold, the elevator control device switches the operation mode to a controlled operation mode; In the controlled operation mode, when the vibration index of the wire rope end on the car side exceeds a first threshold value, the elevator control device switches the speed of the car to a speed lower than that in the normal operation mode.

10. The elevator control device according to claim 9, characterized in that: 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 value, and defines the car position after deducting the position change ΔS of the early deceleration as the speed switching position; the speed switching position has a corresponding relationship with the load and running direction of the car; when the car with the corresponding load and running direction reaches the speed switching position, the elevator control device switches the speed of the car to a speed lower than that in the normal operation mode.

11. The elevator control device according to claim 10, characterized in that: The position change amount ΔS of the early deceleration is determined according to the sway amplitude, sway frequency and sway direction of the building.

12. The elevator control device according to claim 9 or 10, characterized in that: 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.

13. The elevator control device according to claim 12, characterized in that: In the controlled operation mode, after the speed of the car no longer decreases, when the vibration index of the wire rope end on the car side reaches or falls below the second threshold, the elevator control device increases the speed of the car before stopping and decelerating, so that the vibration index of the wire rope end 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.

Images