Elevator micro-motion leveling detection device and method

Abstract

The invention discloses an elevator micro-motion leveling detection device and method. The problems that an existing elevator micro-motion leveling detection device is large in number of parts and high in cost are solved. The device comprises a leveling sensor and a leveling mark component in a hoistway, the leveling sensor is integrated with a plurality of detection elements for achieving leveling area edge detection, leveling area judgment and micro-motion area judgment, and different electric signals are output when all the elements are shielded and not shielded; the flat layer marking part is provided with an upper micro-motion area, a non-micro-motion area and a lower micro-motion area in the vertical direction, shielding pieces matched with the micro-motion area judging element are arranged on the flat layer marking part, an upper groove and a lower groove which are different in vertical length are formed by the adjacent shielding pieces, and the flat layer marking part is further provided with an edge groove matched with the edge detecting element. Detection parts are simplified, the cost is reduced, the position of the lift car can be accurately recognized, reliable signals are provided for micro-motion leveling, door area edge detection can be achieved, the elevator running safety is improved, and the device is matched with an existing elevator control system.

Description

Technical Field

[0001] This invention relates to the field of elevator control technology, specifically to an elevator micro-motion leveling detection device and method. Background Technology

[0002] As a vertical transportation tool, leveling accuracy is one of the core performance indicators of an elevator. When the elevator stops at the target floor, the car floor must be precisely level with the hall threshold to facilitate the safe entry and exit of people and goods. However, during the process of people or goods entering or exiting the car, the load on the car will change in real time, causing the steel cables suspending the car to stretch and deform, resulting in a height deviation between the car floor and the hall threshold. At this time, the elevator needs to perform a micro-leveling operation within the leveling zone to restore the car to a level state with the hall threshold.

[0003] Existing elevator micro-motion leveling detection systems typically use separate leveling sensors A and micro-motion sensors B, with a relatively large number of detection elements C (such as...). Figure 1 As shown in the figure, this not only leads to high production, installation and maintenance costs of elevators, but also makes the layout of components on the top of the elevator car more complicated.

[0004] Therefore, developing an elevator micro-leveling detection device and method that simplifies detection components, reduces costs, and enables precise control of micro-leveling has become an urgent technical problem to be solved in this field. Summary of the Invention

[0005] This invention addresses the technical shortcomings of existing elevator micro-motion leveling detection technologies, such as the large number of detection elements and high cost, by providing an elevator micro-motion leveling detection device and method.

[0006] To solve the above-mentioned technical problems, in a first aspect, the present invention provides an elevator micro-motion leveling detection device, the specific technical solution of which is as follows:

[0007] An elevator micro-motion leveling detection device includes a leveling sensor and a leveling marker component installed in the elevator shaft. The leveling sensor integrates several detection elements for leveling zone edge detection, leveling zone determination, and determination of the micro-motion zone where the car is located. Each detection element outputs different electrical signals to the elevator control system when it is blocked or not blocked. The leveling marker component is divided vertically into an upper micro-motion zone, a non-micro-motion zone, and a lower micro-motion zone. The leveling marker component is provided with several blocking plates that cooperate with the detection elements for micro-motion zone determination. Adjacent blocking plates form an upper groove or a lower groove. The upper groove is located in the upper micro-motion zone, and the lower groove is located in the lower micro-motion zone. The vertical lengths of the upper groove and the lower groove are not equal. The leveling marker component is also provided with an edge groove that cooperates with the detection elements for leveling zone edge detection.

[0008] Furthermore, the detection element includes a first detection element for detecting the edge of the leveling area, a second detection element for determining the leveling area, and a third detection element for determining the micro-motion area where the car is located. The three elements are arranged in the horizontal direction on the leveling sensor. The leveling sensor is fixed to the elevator car and moves synchronously with it. The leveling mark component is fixed at the leveling position of each floor in the elevator shaft.

[0009] Furthermore, the vertical length of the shielding plate is equal to the minimum shielding distance at which the detection element generates the shielding signal, and is used to shield the third detection element and output the shielding signal; the middle position of the vertical length of the non-micro-motion zone corresponds to the position flush with the elevator car floor and the hall threshold.

[0010] Furthermore, the upper groove and lower groove are used to enable the elevator control system to detect that the car is in the upper micro-motion zone and the lower micro-motion zone, respectively; the edge groove is used to enable the first detection element to detect that the car is at the edge of the door zone, and when the elevator control system is in an unknown micro-motion direction and the car is in the edge area, it triggers the door closing operation control.

[0011] Furthermore, the non-micro-motion zone of the leveling sign component is a continuous blocking structure, which can simultaneously block the first detection element, the second detection element, and the third detection element; when the second detection element detects the leveling sign component, the car is located in the leveling zone; the detection element is a photoelectric or magnetic detection element, and its output electrical signal is a high or low level signal.

[0012] Secondly, the present invention provides a method for detecting minor leveling movements in elevators, comprising the following steps:

[0013] S1. The elevator stops at the leveling zone and opens the door. The elevator control system records the initial load data and determines whether the car is in the non-micro-motion zone by detecting the signal of the detection element in the leveling zone.

[0014] S2. When the car needs to be slightly moved to level the floor, the control system calculates the difference between the current and initial load data, and determines the direction of the slight movement based on the difference.

[0015] S3. The car runs in the initial direction. The control system determines the actual micro-motion area of ​​the car through the obstruction / unobstruction signal of the third detection element. If the area does not match the initial direction, it will be corrected in real time.

[0016] S4. The control system moves the car to the middle position of the non-micro-motion zone and stops it, so that the car floor is flush with the threshold of the hall.

[0017] Furthermore, in step S1, the condition for determining that the car is in the non-micro-motion zone is that the first detection element, the second detection element, and the third detection element are all blocked by the leveling sign component, and the travel distance of the elevator car is greater than the vertical length of the blocking plate.

[0018] Furthermore, in step S1, the elevator control system stores the initial load data in the built-in storage unit. In step S2, if the difference between the current load data and the initial load data is less than 0, the initial micro-motion direction is set to downward; if the difference is greater than or equal to 0, the initial micro-motion direction is set to upward.

[0019] Further, in step S3, when the car is in the upper micro-motion zone, the third detection element passes through the upper groove and then the shield, and the unshielded signal continues for a distance equal to the vertical length of the upper groove before switching to a shield signal; when the car is in the lower micro-motion zone, the third detection element passes through the lower groove and then the shield, and the unshielded signal continues for a distance equal to the vertical length of the lower groove before switching to a shield signal; the micro-motion direction correction rule is as follows: if the initial direction is downward micro-motion and it is determined to be in the lower micro-motion zone, it is corrected to upward; if the initial direction is upward micro-motion and it is determined to be in the upper micro-motion zone, it is corrected to downward.

[0020] Furthermore, in step S1, the elevator control system determines that the car is in the leveling zone and performs micro-motion control only in the leveling zone by using the obstruction signal of the second detection element. If the control system does not know the direction of micro-motion and the first detection element detects that the car is at the edge of the door zone, it directly triggers the door closing operation control.

[0021] In step S4, when the car moves to the middle position of the non-micro-motion zone, the first detection element, the second detection element, and the third detection element are all kept in a blocked state. After receiving the signal, the control system controls the car to stop.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention integrates leveling zone edge detection, leveling zone judgment, and car micro-motion zone judgment functions into several detection elements of the leveling sensor, eliminating the separate micro-motion detection components in existing technologies. This simplifies the number of components in the detection system, reduces production and installation costs, and simplifies the component layout on the top of the elevator car. The leveling marker component divides different micro-motion zones vertically and, through several blocking plates and upper and lower grooves of unequal vertical lengths formed by adjacent blocking plates, combines the differentiated electrical signals from the blocked and unblocked detection elements. This allows the elevator control system to accurately identify the leveling zone edge, leveling zone, and specific micro-motion zone where the car is located, achieving accurate detection of the car's position and providing reliable signal basis for micro-motion leveling control. Furthermore, the edge groove on the leveling marker component, in conjunction with the detection elements for leveling zone edge detection, enables effective detection of the car door zone edge, providing signal support for safety control of elevator edge areas and improving the device's safety protection. The overall structural design of the device ensures proper matching of all components, stable signal transmission, and direct interface with the elevator control system, exhibiting good adaptability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of existing technology;

[0026] Figure 2 This is a schematic diagram of the structure of the present invention;

[0027] Figure 3 This is a diagram illustrating the method steps of the present invention;

[0028] Figure 4 This is a logic block diagram of the micro-motion control principle of the present invention.

[0029] In the figure, 1-leveling sensor, 11-first detection element, 12-second detection element, 13-third detection element, 2-leveling mark component, 21-upper micro-motion zone, 22-non-micro-motion zone, 23-lower micro-motion zone, 24-shielding plate, 25-upper groove, 26-lower groove, 27-edge groove. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 2-4 As shown, this invention proposes an elevator micro-motion leveling detection device and method, the specific scheme of which is as follows:

[0032] An elevator micro-motion leveling detection device includes a leveling sensor 1 and a leveling marker component 2 installed in the elevator shaft. The leveling sensor 1 is electrically connected to the elevator control system. When each detection element is blocked or not blocked, it outputs different high and low level electrical signals to the elevator control system, which then performs signal analysis, position determination, and operation control.

[0033] The leveling sensor 1 integrates several detection elements, which work together to perform leveling zone edge detection, leveling zone determination, and determination of the micro-motion area where the car is located. Preferably, the detection elements include a first detection element 11, a second detection element 12, and a third detection element 13, which are arranged laterally at the detection end of the leveling sensor 1, effectively saving vertical installation space of the leveling sensor on the top of the car and adapting to different installation requirements. Among them, the first detection element 11 is dedicated to leveling zone edge detection, the second detection element 12 is dedicated to leveling zone determination, and the third detection element 13 is dedicated to determining the micro-motion area where the car is located. The leveling sensor 1 is fixed to the side of the elevator car and moves vertically up and down synchronously with the elevator car. The leveling mark component 2 is fixed to the side wall of the elevator shaft corresponding to each leveling position and is adapted to the detection position of the leveling sensor 1.

[0034] The leveling marker component 2 is divided into an upper micro-motion zone 21, a non-micro-motion zone 22, and a lower micro-motion zone 23 along the vertical direction. The non-micro-motion zone 22 is the area where the car does not need to perform micro-motion leveling operations. The middle position of its vertical length corresponds precisely to the position where the elevator car floor and the hall threshold are level, ensuring that the leveling accuracy is optimal when the car stops at this position.

[0035] The leveling marker component 2 is provided with several blocking plates 24 that cooperate with the third detection element 13. Adjacent blocking plates 24 form several evenly spaced upper grooves 25 or lower grooves 26. The upper grooves 25 are located in the upper micro-motion zone 21, and the lower grooves 26 are located in the lower micro-motion zone 23. The vertical lengths of the upper grooves 25 and lower grooves 26 are unequal, providing the elevator control system with differentiated dimensional characteristics for identifying the upper and lower micro-motion zones. The vertical length of the blocking plate 24 is equal to the minimum blocking distance required for the detection element to generate a blocking signal, effectively blocking the third detection element 13 and causing it to output a blocking electrical signal, ensuring the accuracy of signal detection.

[0036] The leveling marker component 2 is also provided with an edge groove 27 that cooperates with the first detection element 11. The edge groove 27 is set at the upper and lower edge positions of the leveling area, which enables the first detection element 11 to detect the edge of the door area and output an edge recognition signal. When the elevator control system receives the edge recognition signal in an unknown micro-motion direction, such as when the system is just powered on, the signal is lost, or the edge recognition signal is received, it will immediately trigger the door closing operation control to avoid safety accidents.

[0037] The non-micro-motion zone 22 of the leveling marker component 2 has a continuous blocking structure, which can simultaneously block the first detection element 11, the second detection element 12, and the third detection element 13, enabling the elevator control system to quickly determine that the car is in the non-micro-motion zone. When the second detection element 12 detects the blocking signal of the leveling marker component 2, it determines that the car is in the leveling zone and performs micro-motion leveling control only within the leveling zone. The detection elements can be photoelectric detection elements or magnetic detection elements, both of which are existing mature detection components. Their output high and low level electrical signals can be directly recognized by the elevator control system without the need for an additional signal conversion module.

[0038] A detection method based on the above-mentioned elevator micro-motion leveling detection device includes the following specific steps:

[0039] S1. After the elevator stops at the target floor, the second detection element 12 detects the obstruction signal of the leveling mark component 2. The elevator control system determines that the car is in the leveling zone and controls the car door and hall door to open. At the moment the doors open, the elevator control system obtains the initial load data of the car through the load detection module and stores the data in the built-in storage unit. At the same time, the elevator control system determines whether the car is in the non-micro-motion zone 22 within the leveling zone by combining the signals of the first, second and third detection elements. The determination condition is that the first detection element 11, the second detection element 12 and the third detection element 13 are all obstructed by the leveling mark component 2, and the running distance of the elevator car is greater than the vertical length of the obstruction plate 24.

[0040] S2. When the load changes due to personnel or goods entering or leaving the car, and the height deviation between the car floor and the hall threshold caused by the extension and contraction of the wire rope exceeds the preset threshold, the elevator control system determines that the car needs to perform a micro-motion leveling operation. At this time, the control system obtains the current load data of the car, calculates the difference between the current load data and the initial load data in the storage unit, and initially determines the micro-motion direction of the car based on the difference: if the difference is less than 0, it means that the load of the car has been reduced and the wire rope has been extended, causing the car to move upward, and the initial micro-motion direction is determined to be downward; if the difference is greater than or equal to 0, it means that the load of the car has been increased and the wire rope has been shortened, causing the car to move downward, and the initial micro-motion direction is determined to be upward.

[0041] S3. The elevator control system controls the car to run at low speed in the initially determined micro-motion direction. During the operation, the actual micro-motion zone of the car is determined by the changes in the obstruction / unobstruction signal of the third detection element 13 combined with the dimensional characteristics of the upper groove 25 and the lower groove 26.

[0042] Determination of the car being in the upper micro-motion zone 21: The third detection element 13 first outputs an unobstructed signal through the upper groove 25. After the duration of the unobstructed signal matches the vertical length of the upper groove 25, it is switched to an obstructed signal through the obstruction plate 24. The elevator control system determines that the car is in the upper micro-motion zone 21.

[0043] Determination of the car being in the lower micro-motion zone 23: The third detection element 13 first outputs an unobstructed signal through the lower groove 26. After the duration of the unobstructed signal matches the vertical length of the lower groove 26, it is switched to an obstructed signal through the obstruction plate 24. The elevator control system determines that the car is in the lower micro-motion zone 23.

[0044] If the actual micro-motion area determined does not match the initial micro-motion direction, the elevator control system corrects the micro-motion direction in real time. The correction rule is as follows: if the initial direction is downward micro-motion and the car is determined to be in the lower micro-motion area 23, then the micro-motion direction is corrected to upward; if the initial direction is upward micro-motion and the car is determined to be in the upper micro-motion area 21, then the micro-motion direction is corrected to downward.

[0045] S4. The elevator control system controls the car to continue running in the corrected micro-motion direction or the initially determined correct micro-motion direction until the car enters the middle position of the non-micro-motion zone 22. At this time, the first detection element 11, the second detection element 12, and the third detection element 13 are all kept in the blocked state. After receiving the continuous blocking signal, the elevator control system immediately controls the car to stop running, completes the micro-motion leveling operation, and achieves precise alignment between the car floor and the hall threshold.

[0046] Furthermore, throughout the entire process of step S1, the elevator control system always determines whether the car is in the leveling zone through the obstruction signal of the second detection element 12, and only performs micro-motion leveling control in the leveling zone; if the elevator control system does not know the direction of micro-motion, and the first detection element 11 detects that the car is at the edge of the door zone, the control system will skip the subsequent micro-motion steps and directly trigger the door closing operation control to achieve safety protection at the edge of the door zone.

[0047] The device and method of the present invention are not only applicable to the passenger elevator in this embodiment, but also to various types of elevators such as freight elevators and medical elevators. They are especially suitable for freight elevators with frequent load changes, and can effectively solve the leveling deviation problem caused by load changes, taking into account both cost and safety, and have good prospects for industrial application.

[0048] The elevator micro-motion leveling detection device and method of the present invention comprehensively achieve multiple technical effects such as cost reduction, space saving, safety enhancement, and easy promotion. Through integrated design, the number of detection elements is reduced. The first, second, and third detection elements are arranged horizontally to save vertical installation space in the shaft. The elimination of independent micro-motion sensors greatly reduces the production, installation, and maintenance costs of elevators. The leveling mark component adopts an integrated design of shielding plate and groove body with different vertical lengths of upper and lower grooves, which, together with the detection elements, enables accurate identification of the micro-motion area of ​​the car.

[0049] By combining the difference in car load variation with the obstruction / unobstruction signal from the detection element, the precise initial determination and real-time correction of the micro-motion direction are achieved. This effectively avoids directional errors based on a single signal, significantly improving the accuracy of micro-motion leveling control and ensuring precise alignment between the car floor and the hall threshold. Simultaneously, the edge groove, in conjunction with the first detection element, enables precise identification of the door zone edge. When the control system is unaware of the micro-motion direction, it triggers door closing control, filling the gap in safety protection at the leveling zone edge and effectively preventing elevator operation safety accidents. Furthermore, the overall device structure and control logic are simple. The detection element uses existing mature photoelectric or magnetic sensing components, and the output signal can be directly recognized by the existing elevator control system without the need for complex control modules. Only a simple program upgrade of the existing control system is required for adaptation, making it highly versatile and easy to promote and apply in the industry.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting minor leveling motion in elevators, characterized in that, The system includes a leveling sensor and a leveling marker component installed in the elevator shaft. The leveling sensor integrates several detection elements for leveling zone edge detection, leveling zone determination, and determination of the micro-motion zone where the car is located. Each detection element outputs different electrical signals to the elevator control system when it is blocked or not blocked. The leveling marker component is divided vertically into an upper micro-motion zone, a non-micro-motion zone, and a lower micro-motion zone. The leveling marker component is provided with several blocking plates that cooperate with the detection elements for micro-motion zone determination. Adjacent blocking plates form an upper groove or a lower groove. The upper groove is located in the upper micro-motion zone, and the lower groove is located in the lower micro-motion zone. The vertical lengths of the upper groove and the lower groove are not equal. The leveling marker component is also provided with an edge groove that cooperates with the detection elements for leveling zone edge detection.

2. The elevator micro-motion leveling detection device according to claim 1, characterized in that, The detection elements include a first detection element for detecting the edge of the leveling area, a second detection element for determining the leveling area, and a third detection element for determining the micro-movement area where the car is located. The three elements are arranged in the horizontal direction on the leveling sensor. The leveling sensor is fixed to the elevator car and moves synchronously with it. The leveling marker component is fixed at the leveling position of each floor in the elevator shaft.

3. The elevator micro-motion leveling detection device according to claim 2, characterized in that, The vertical length of the shielding plate is equal to the minimum shielding distance at which the detection element generates the shielding signal. It is used to shield the third detection element and output the shielding signal. The middle position of the vertical length of the non-micro-motion zone corresponds to the position where it is flush with the elevator car floor and the hall threshold.

4. The elevator micro-motion leveling detection device according to claim 2, characterized in that, The upper and lower slots are used to enable the elevator control system to detect that the car is in the upper and lower micro-motion zones, respectively; the edge slot is used to enable the first detection element to detect that the car is at the edge of the door zone, and when the elevator control system is in an unknown micro-motion direction and the car is in the edge zone, it triggers the door closing operation control.

5. The elevator micro-motion leveling detection device according to claim 2, characterized in that, The non-micro-motion zone of the leveling sign component is a continuous blocking structure, which can simultaneously block the first detection element, the second detection element, and the third detection element; when the second detection element detects the leveling sign component, the car is located in the leveling zone; the detection element is a photoelectric or magnetic detection element, and its output electrical signal is a high or low level signal.

6. A method for detecting elevator micro-motion leveling based on the device described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The elevator stops at the leveling zone and opens the door. The elevator control system records the initial load data and determines whether the car is in the non-micro-motion zone by detecting the signal of the detection element in the leveling zone. S2. When the car needs to be slightly moved to level the floor, the control system calculates the difference between the current and initial load data, and determines the direction of the slight movement based on the difference. S3. The car runs in the initial direction. The control system determines the actual micro-motion area of ​​the car through the obstruction / unobstruction signal of the third detection element. If the area does not match the initial direction, it will be corrected in real time. S4. The control system moves the car to the middle position of the non-micro-motion zone and stops it, so that the car floor is flush with the threshold of the hall.

7. The elevator micro-motion leveling detection method according to claim 6, characterized in that, In step S1, the condition for determining that the car is in the non-micro-motion zone is that the first detection element, the second detection element, and the third detection element are all blocked by the leveling sign component, and the travel distance of the elevator car is greater than the vertical length of the blocking plate.

8. The elevator micro-motion leveling detection method according to claim 6, characterized in that, In step S1, the elevator control system stores the initial load data in the built-in storage unit. In step S2, if the difference between the current load data and the initial load data is less than 0, the initial micro-motion direction is set to downward; if the difference is greater than or equal to 0, the initial micro-motion direction is set to upward.

9. The elevator micro-motion leveling detection method according to claim 6, characterized in that, In step S3, when the car is in the upper micro-motion zone, the third detection element passes through the upper groove and then the shielding plate, and the unobstructed signal continues for a distance equal to the vertical length of the upper groove before switching to the shielding signal; when the car is in the lower micro-motion zone, the third detection element passes through the lower groove and then the shielding plate, and the unobstructed signal continues for a distance equal to the vertical length of the lower groove before switching to the shielding signal; the micro-motion direction correction rule is as follows: if the initial direction is downward micro-motion and it is determined to be in the lower micro-motion zone, it is corrected to upward; if the initial direction is upward micro-motion and it is determined to be in the upper micro-motion zone, it is corrected to downward.

10. The elevator micro-motion leveling detection method according to claim 6, characterized in that, In step S1, the elevator control system determines that the car is in the leveling zone and performs micro-motion control only in the leveling zone by using the obstruction signal of the second detection element. If the control system does not know the direction of micro-motion and the first detection element detects that the car is at the edge of the door zone, it directly triggers the door closing operation control. In step S4, when the car moves to the middle position of the non-micro-motion zone, the first detection element, the second detection element, and the third detection element are all kept in a blocked state. After receiving the signal, the control system controls the car to stop.

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