CN118908001A - Accurate landing method and system for elevator - Google Patents

Abstract

The invention relates to an elevator leveling accurate stopping method and system, which solve the problem that the actual stopping position cannot be specifically detected due to traction rope sliding in the related art by constructing a door zone position positioning mechanism based on resistance change between a lift car and a hoistway, namely, the position information of the lift car in the door zone range can be accurately obtained in real time, and an elevator driving system is controlled according to the position information, so that high-precision leveling stopping is realized, and the riding comfort and safety of passengers are obviously improved. In addition, the invention has simple implementation, stable and reliable structure, strong anti-interference capability, simple and convenient installation, is not easily influenced by factors such as elevator running speed, acceleration, load and the like, does not need to greatly change the structure of the existing elevator, is suitable for various elevators, and has good economic benefit and popularization and application value.

Description

Elevator leveling precise parking method and system

Technical Field

The present invention relates to the technical field of elevators, and in particular to a method and system for accurate leveling and parking of an elevator.

Background Art

In the prior art, elevator leveling refers to the elevator car accurately stopping at the floor leveling area to facilitate passengers to enter and exit the car. Elevator leveling accuracy is one of the important indicators to measure elevator performance, which directly affects the riding comfort and safety of passengers.

However, in the actual operation of the elevator, the car stop position may deviate from the ideal leveling position. This is mainly due to the relative slip between the wire rope and the traction wheel or the influence of the car spring, or the interference of the host encoder and photoelectric switch signals, as well as the combined effect of factors such as the control cabinet speed curve algorithm. The resulting error may reach several millimeters or even centimeters, which may easily cause passengers to stumble when entering and exiting the car, and may also cause difficulties for passengers carrying equipment such as wheelchairs to enter and exit. In other words, since it is difficult for the control system to obtain high-precision information on the actual car stop position, achieving high-precision leveling stops has become a technical problem.

Chinese patent document CN115626537A discloses a real-time elevator operation monitoring and calibration device, which uses a magnetic sensor and a counter to detect the running position of the elevator car. The device installs a magnetic sensor on the top of the car and fixes a ferromagnetic metal object on the inner wall of the shaft. When the car passes through the ferromagnetic metal object, the magnetic sensor will detect the change in the magnetic field and record the number of ferromagnetic metal objects passing through the counter, thereby determining the running position of the car. However, the above-mentioned existing technical solutions cannot meet the needs of high-precision leveling control, and the high-precision encoder is expensive, and the installation and debugging are relatively complicated, which increases the manufacturing cost of the elevator.

Summary of the invention

In order to solve the above problems, the present invention provides a method and system for accurate elevator leveling parking, which can obtain the position information of the car within the door area in real time and accurately, and control the elevator drive system accordingly, thereby realizing high-precision leveling parking.

In order to achieve the above object, the present invention provides a method for accurate parking of an elevator at a level floor, the method comprising the following steps:

Ⅰ. A position sensitive element is set within the door area of each floor in the elevator shaft, and the position sensitive element is used to convert the information of different positions of the elevator car within any door area into corresponding resistance values;

Ⅱ. When the elevator car runs to the door area of the target floor, the detection probe installed on the elevator car contacts the position sensitive element within the door area of the target floor;

III. The detection probe detects the resistance value change of the position sensitive element in real time, and sends the resistance value change signal to the elevator control system;

IV. The elevator control system receives the resistance value change signal and determines the real-time position of the elevator car according to the resistance values of the elevator car at different positions within the door area of the target floor;

V. The elevator control system controls the elevator host system to drive the elevator car to stop at the target stop position according to the real-time position of the elevator car.

Optionally, the position sensitive element includes an insulating substrate and a plurality of resistor elements disposed on the insulating substrate, wherein the plurality of resistor elements are regularly arranged along the moving direction of the elevator car to form a resistor array, and the resistance value of the resistor array changes linearly with the movement of the elevator car within the door area.

Optionally, the position sensitive element is a sliding winding that cooperates with the detection probe to form a sliding rheostat. When the detection probe is electrically connected to the sliding winding within the door area of the target floor, the resistance of the sliding rheostat changes linearly with the movement of the elevator car within the door area.

Optionally, a conductive wipe plate is also provided within the door area of each floor in the elevator shaft, and the conductive wipe plate is connected in series with the position sensitive element; the detection probe includes a first detection probe for sliding contact with the position sensitive element and a second detection probe for sliding contact with the conductive wipe plate; when the first detection probe is in contact with the position sensitive element and the second detection probe is in contact with the conductive wipe plate, a resistance measurement circuit is formed to detect the real-time resistance value change of the position sensitive element.

Optionally, in step II, when the elevator car approaches the target floor, the elevator car decelerates and controls a detection probe installed on the elevator car to extend and contact a position sensitive element within the door area of the target floor; when the detection probe is not in contact with the position sensitive element, the detection probe retracts and resets.

Optionally, the detection probe includes a rod, a spherical probe and a driving device, wherein the driving device is installed on the elevator car and moves synchronously with the elevator car; the rod is installed on the driving device and is configured to rotate relative to the elevator car under the drive of the driving device; the spherical probe is installed at one end of the rod away from the elevator car, for contacting the position sensitive element.

Optionally, also include:

a first detection contact, arranged on a moving path of the detection probe relative to the elevator car and electrically connected to the elevator control system;

Wherein, when the detection probe is retracted and reset, the first detection contact obtains a first trigger signal and sends it to the elevator control system;

If the elevator control system does not receive the first trigger signal after issuing the detection probe retraction and reset instruction, it outputs fault information.

Optionally, also include:

a second detection contact, disposed on a moving path of the detection probe relative to the elevator car and electrically connected to the elevator control system;

Wherein, when the detection probe is extended and contacts the position sensitive element, the second detection contact obtains a second trigger signal and sends it to the elevator control system;

If the elevator control system does not receive the second trigger signal after issuing the detection probe extension instruction, it outputs fault information.

On the other hand, the present invention also provides an elevator leveling and precise parking system, comprising:

A sensing unit is arranged in the door area of each floor in the elevator shaft, and is used to convert information of different positions of the elevator car in the door area into corresponding resistance values;

A detection unit is provided on the elevator car and is configured to contact the sensing unit of the target floor when the elevator car runs within the door zone of the target floor, and is used to detect the change of the resistance value of the sensing unit in real time;

The main control unit is used to receive the resistance value change signal obtained by the detection unit, and determine the real-time position of the elevator car according to the preset resistance values of the elevator car at different positions within the door area of the target floor;

Among them, the main control unit controls the elevator host system based on the deviation between the real-time position of the elevator car and the target parking position to achieve accurate parking of the elevator car.

Optionally, it further includes a telescopic control device for controlling the detection unit to move between a working position and a stowed position;

Wherein, the detection unit is in contact with the sensing unit when in the working position, and is away from the sensing unit when in the retracted position.

The elevator leveling precise parking method and system designed by the present invention overcomes the problem in the related art that the actual parking position cannot be specifically detected due to the slippage of the traction rope by constructing a door area positioning mechanism based on resistance change between the car and the shaft, that is, it can obtain the position information of the car within the door area in real time and accurately, and control the elevator drive system accordingly to achieve high-precision leveling parking, thereby significantly improving the riding comfort and safety of passengers. In addition, the present invention is simple to implement, has a stable and reliable structure, strong anti-interference ability, is not easily affected by factors such as elevator running speed, acceleration, load, etc., and is easy to install, without major changes to the existing elevator structure, and is suitable for various types of elevators, with good economic benefits and promotion and application value.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a flow chart of an elevator leveling and precise parking method provided in an embodiment of the present application;

FIG2 is a schematic diagram showing a method for accurately parking an elevator at a level floor provided by an embodiment of the present application;

FIG3 is a schematic diagram of detecting a change in resistance value of a position sensitive element provided in an embodiment of the present application;

4 is a schematic diagram of determining the real-time position within the elevator car door area by using a resistance value according to an embodiment of the present application;

FIG5 is a schematic diagram of a resistance measurement circuit provided in an embodiment of the present application;

FIG6 shows an architecture diagram of an elevator leveling and precise parking system.

Among them: position sensitive element 10, insulating substrate 11, resistor array 12, conductive wiper 13, elevator car 20, detection probe 30, first detection probe 30a, second detection probe 30b, rod 31, spherical probe 32, elevator control system 40, elevator host system 50, first detection contact 60, second detection contact 70, resistance analysis circuit 80, elevator guide rail bracket 90, sensing unit 100, detection unit 200, main control unit 300, telescopic control device 400.

DETAILED DESCRIPTION

The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

Example 1.

In the elevator system of a multi-story building, the elevator system generally includes an elevator car 20 for carrying passengers, an elevator shaft for the elevator car 20 to run therein (each floor is provided with a door area for the elevator car 20 to stop), an elevator control system 40 which is the core control part of the entire elevator system, and an elevator host system 50 which is the power source of the elevator system. The elevator host system 50 drives the lifting and lowering movement of the elevator car 20 by receiving instructions from the elevator control system 40.

On the one hand, this embodiment provides an elevator leveling and precise parking method, which can be applied to the aforementioned elevator system to achieve precise parking of the elevator leveling. Referring to Figures 1-6, the method includes the following steps:

Ⅰ. A position sensitive element 10 is provided within the door zone of each floor in the elevator shaft. The position sensitive element 10 is used to convert information of different positions of the elevator car 20 within any door zone into corresponding resistance values.

Specifically, position sensitive elements 10 are installed in the door area of each floor in the elevator shaft, and the resistance value of the position sensitive element 10 and the different positions of the elevator car 20 in the door area of the floor are pre-set to correspond to each other. For example, the resistance value is linearly related to the car position: when the elevator car 20 is parked in the center of the door area (i.e., the standard leveling position), the resistance value collected by the position sensitive element 10 is the preset standard value; when the elevator car 20 is parked at an upper position, the resistance value collected by the position sensitive element 10 will be less than the preset standard value; conversely, when the elevator car 20 is parked at a lower position, the resistance value collected by the position sensitive element 10 will be greater than the preset standard value. In this way, by setting the standard resistance value corresponding to the standard leveling position, the position and deviation direction of the elevator car 20 in the door area can be intuitively judged according to the deviation between the resistance value and the standard value.

Optionally, the position sensitive element 10 includes an insulating substrate 11 and a plurality of resistor elements disposed on the insulating substrate 11, wherein the plurality of resistor elements are regularly arranged along the moving direction of the elevator car 20 to form a resistor array 12, and the resistance value of the resistor array 12 changes linearly with the movement of the elevator car 20 within the door area.

In this way, according to the length of the door area range and the required accuracy, the resistor array 12 is designed and manufactured. The resistor array 12 is composed of a plurality of resistor elements whose resistance values change linearly, that is, these resistor elements are regularly arranged on the insulating substrate 11, and the manufactured insulating substrate 11 (resistor array 12) is installed on the installation position determined in the previous steps to ensure that the resistor array 12 is parallel to the moving direction of the car. At the same time, one end of the resistor array 12 is electrically connected to the elevator control system 40 for monitoring the change of the resistance value.

II. When the elevator car 20 runs to the door zone of the target floor, the detection probe 30 provided on the elevator car 20 contacts the position sensitive element 10 within the door zone of the target floor.

Specifically, the elevator control system 40 monitors the position information of the elevator car 20 in real time (for example, it can be obtained through an encoder or other sensor). When the car approaches the target floor and enters the door area of the target floor, the detection probe 30 contacts the position sensitive element 10 pre-installed in the door area of the target floor. In the present embodiment, the detection probe 30 is connected to the elevator main control system 40 via an accompanying cable on the elevator car 20. At the same time, the installation position of the detection probe 30 should ensure that it can reliably contact the position sensitive element 10 when the elevator car 20 runs into the door area of the floor.

Optionally, in step II, when the elevator car 20 approaches the target floor, the elevator car 20 decelerates and controls the detection probe 30 disposed on the elevator car 20 to extend and contact the position sensitive element 10 within the door area of the target floor; when the detection probe 30 is not in contact with the position sensitive element 10, the detection probe 30 retracts and resets. In this way, the detection probe 30 will only extend and contact the position sensitive element 10 when the car 20 decelerates and prepares to stop smoothly, thereby avoiding unnecessary wear caused by long-term extension and friction with the position sensitive element 10 and other components. At the same time, since the detection probe 30 starts to move after the elevator car 20 enters the deceleration stage, it effectively avoids strong collisions that may occur during high-speed operation. In addition, in this embodiment, the telescopic action of the detection probe 30 is realized by a driving mechanism installed on the car 20, and the driving mechanism can be in various forms such as a motor, an electromagnet, and a cylinder.

III. The detection probe 30 detects the resistance value change of the position sensitive element 10 in real time, and sends the resistance value change signal to the elevator control system 40.

Specifically, referring to Figures 3 and 4, taking a door zone distance of 250 mm wide as an example, when the elevator car 20 is parked in the center of the door zone (i.e., the standard leveling position is 125 mm), the detection probe 30 is located in the middle position of the resistor array 12. At this time, the resistance value measured by the elevator control system is a preset standard value (e.g., 5 kΩ). When the elevator car 20 is parked at an upper position in the door zone (0 mm-125 mm), the detection probe 30 is connected to relatively fewer resistor elements of the resistor array 12, and the resistance value measured by the elevator control system 40 gradually decreases relative to the preset standard value (less than 5 kΩ). Conversely, when the elevator car 20 is parked at a lower position in the door zone (125 mm-250 mm), the detection probe 30 is connected to relatively more resistor elements of the resistor array 12, and the resistance value measured by the elevator control system 40 gradually increases relative to the preset standard value (greater than 5 kΩ). In this way, a circuit is formed by electrically connecting the resistor array 12 and the detection probe 30 to the elevator control system 40, and the real-time position information of the elevator car 20 in the target door area is effectively converted into a resistance value change signal and sent to the elevator control system 40 for further processing.

IV. The elevator control system 40 receives the resistance value change signal and determines the real-time position of the elevator car 20 according to the preset resistance values of the elevator car 20 at different positions within the door area of the target floor.

Specifically, the elevator control system 40 converts the processed resistance value signal into real-time position information of the elevator car 20 within the door area of the target floor according to the pre-established correspondence between different positions of the elevator car 20 within the door area and the resistance value. For example, when the elevator car 20 is located in the center of the door area (standard leveling position), the resistance value is 5kΩ, and the resistance value change rate of the position sensitive element 10 is 1kΩ/100mm. That is, the resistance value changes by 1kΩ for every 100mm movement of the car. When the elevator car 20 runs into the door area of the target floor, the detection probe 30 contacts the position sensitive element 10 and starts to slide. The elevator control system 40 collects the resistance value change signal in real time: if the control system 40 receives a signal of 6kΩ, it means that the car is located 100mm below the standard leveling position; if the control system 40 receives a signal of 4kΩ, it means that the car is located 100mm above the standard leveling position. In this way, the elevator control system 40 can grasp the precise position of the car within the door area of the target floor in real time by detecting the change of the resistance value in real time and performing position calculation, thereby providing a basis for subsequent precise parking control.

V. The elevator control system 40 controls the elevator host system 50 to drive the elevator car 20 to stop at the target stop position according to the real-time position of the elevator car 20.

Specifically, the elevator control system 40 determines the difference between the real-time position of the elevator car 20 and the target stop position according to the real-time position information of the elevator car 20 obtained in step IV, and controls the elevator host system 50 to slowly drive the elevator car 20 to approach the target stop position. After eliminating the difference, the elevator control system 40 sends a stop signal to control the elevator host system 50 to stop the operation of the car 20. Finally, the car 20 accurately stops in the center of the door area of the target floor, effectively solving the parking error problem existing in the traditional elevator leveling technology.

In another example, the position sensitive element 10 is a sliding winding that cooperates with the detection probe 30 to form a sliding rheostat. When the detection probe 30 is electrically connected to the sliding winding within the door area of the target floor, the resistance value of the sliding rheostat changes linearly within the door area as the elevator car 20 moves. Compared with other high-precision sensitive elements, the sliding rheostat has a relatively low cost, is easy to purchase, and is easy to install.

In some embodiments, as shown in FIG. 5 , a conductive wipe plate 13 is further provided within the door area of each floor in the elevator shaft, and the conductive wipe plate 13 is connected in series with the position sensitive element 10; the detection probe 30 includes a first detection probe 30a for sliding contact with the position sensitive element 10 and a second detection probe 30b for sliding contact with the conductive wipe plate 13; when the first detection probe 30a is in contact with the position sensitive element 10 and the second detection probe 30b is in contact with the conductive wipe plate 13, a resistance measurement circuit is formed to detect the real-time resistance value change of the position sensitive element 10.

With the above structural design, when the elevator car 20 runs to the door area of the target floor, the first detection probe 30a contacts the position sensitive element 10, and the second detection probe 30b contacts the conductive wiper 13, forming a complete resistance measurement circuit. That is, by introducing the conductive wiper 13, one end of the position sensitive element 10 does not need to be connected to the elevator control system 40 through wiring from the elevator shaft, but is directly connected to the elevator control system 40 through the accompanying cable on the elevator car 20 and the detection probe 30, so as to simplify the wiring and reduce the installation cost. At the same time, it also avoids the problem that the signal cable is too long, which will cause signal attenuation and affect the measurement accuracy.

In other examples, a resistance analysis circuit 80 may also be provided to convert the resistance signal collected by the detection probe into the absolute position information of the car in the leveling position (door area range). Referring to FIG3 and FIG5, after the first detection probe 30a (output Rx) and the second detection probe 30b (output R0) collect the resistance signal of the position sensitive element 10, the resistance analysis circuit 80 processes these signals, such as filtering, amplifying, etc., to improve the signal quality. Finally, the resistance analysis circuit 80 converts the processed signal into the absolute position information of the car in the leveling position, and transmits it to the elevator control system 40, that is, converting the original analog signal into a digital signal that is easier to understand and process by the elevator control system 40, so as to facilitate subsequent control decisions. In addition, in the present embodiment, the resistance analysis circuit 80 may be provided on the elevator car 20 as shown in FIG5, or may be provided in the machine room at the top of the elevator shaft as shown in FIG2.

In some embodiments, as shown in Figure 3, the detection probe 30 includes a rod 31, a spherical probe 32 and a driving device, wherein the driving device is installed on the elevator car 20 and moves synchronously with the elevator car 20; the rod 31 is installed on the driving device and is configured to rotate relative to the elevator car 20 under the drive of the driving device; the spherical probe 32 is installed at one end of the rod 31 away from the elevator car 20, for contacting the position sensitive element 10. With this structural design, the driving device is installed on the elevator car 20 and moves synchronously with the car 20, for example, it is fixed on the top or bottom of the car 20. During the normal operation of the elevator car 20, the driving device (for example, a driving motor) controls the rotating rod 31 to remain in a preset position, so that the spherical probe 32 is in a retracted state and away from the position sensitive element 10. When the elevator car 20 approaches the target floor, the elevator control system 40 issues an instruction to control the driving device to drive the rotating rod 31 to rotate. The rotating rod 31 drives the spherical probe 32 to rotate, so that it extends out and contacts with the position sensitive element 10 pre-installed within the door area of the target floor. The spherical design can ensure good contact with the position sensitive element 10 and reduce friction. When the car 20 completes the leveling stop, the elevator control system 40 issues an instruction again to control the driving device to drive the rotating rod 31 to rotate in the opposite direction, so that the spherical probe 32 is retracted to the initial position to prepare for the next leveling.

In some embodiments, as shown in FIG. 3 , the invention further includes:

a first detection contact 60, which is disposed on a moving path of the detection probe 30 relative to the elevator car 20 and is electrically connected to the elevator control system 40;

When the detection probe 30 is retracted and reset, the first detection contact 60 obtains a first trigger signal and sends it to the elevator control system 40;

If the elevator control system 40 does not receive the first trigger signal after issuing the detection probe 30 retraction reset instruction, it outputs fault information. In this way, by setting the first detection contact 60, the reset state of the detection probe 30 can be monitored in real time, and the fault can be discovered and processed in time to avoid accidental collision or measurement error caused by the failure of the detection probe 30 to reset, thereby improving the safety of the system. That is, when the detection probe 30 fails to reset, the fault information output by the elevator control system 40 can help maintenance personnel quickly locate the cause of the fault and improve maintenance efficiency. In this embodiment, the first detection contact 60 can be a travel switch, a micro switch or a proximity sensor.

In this embodiment, it also includes:

A second detection contact 70 is disposed on a moving path of the detection probe 30 relative to the elevator car 20 and is electrically connected to the elevator control system 40;

When the detection probe 30 extends out and contacts the position sensitive element 10, the second detection contact 70 obtains a second trigger signal and sends it to the elevator control system 40;

If the elevator control system 40 does not receive the second trigger signal after issuing the instruction to extend the detection probe 30, it outputs fault information.

During operation, when the elevator car 20 approaches the target floor, the elevator control system 40 issues an instruction to control the driving device to drive the detection probe 30 to extend. During the process of extending the detection probe 30, if it successfully reaches the working position, it will touch the second detection contact 70. After the second detection contact 70 is triggered, a second trigger signal will be generated and sent to the elevator control system 40. After receiving the second trigger signal, the elevator control system 40 determines that the detection probe 30 has been successfully extended to the working position. If the elevator control system 40 does not receive the second trigger signal within a preset time after issuing the detection probe 30 extension instruction, it determines that the detection probe 30 has failed to extend, and outputs fault information to prompt relevant personnel to perform maintenance.

In combination with the above scheme and the first detection contact 60, the extension and retraction status of the detection probe 30 can be dual-monitored to ensure its reliable operation, further improve the safety of the system, and achieve timely warning in case of failure, avoiding leveling errors or other safety problems caused by the failure of the detection probe 30 to work properly.

On the other hand, referring to FIG. 6 , the present embodiment further provides an elevator leveling precise parking system, comprising: a sensing unit 100, arranged within the door zone of each floor in the elevator shaft, for converting information of different positions of the elevator car 20 within the door zone into corresponding resistance values;

The detection unit 200 is arranged on the elevator car and is configured to contact the sensing unit 100 of the target floor when the elevator car runs to the door zone of the target floor, and is used to detect the resistance value change of the sensing unit 100 in real time; the main control unit 300 is used to receive the resistance value change signal obtained by the detection unit 200, and determine the real-time position of the elevator car according to the resistance values of different positions of the elevator car 20 in the door zone of the target floor set in advance;

The main control unit 300 controls the elevator host system based on the deviation between the real-time position of the elevator car and the target parking position to achieve accurate parking of the elevator car.

Optionally, it further includes a telescopic control device 400 for controlling the detection unit 200 to move between the working position and the stowed position;

The detection unit 200 is in contact with the sensing unit 100 when in the working position, and is away from the sensing unit 100 when in the retracted position.

For the convenience and brevity of description, technicians in the relevant field can clearly understand that the specific working process of the system described above can refer to the corresponding process in the aforementioned leveling precise docking method embodiment, and will not be repeated here.

The elevator leveling precise parking method and system provided in this embodiment, by constructing a door zone position positioning mechanism based on resistance change between the car and the shaft, overcomes the problem in the related art that the actual parking position cannot be specifically detected due to the slippage of the traction rope, that is, it can obtain the position information of the car within the door zone in real time and accurately, and control the elevator drive system accordingly to achieve high-precision leveling parking, thereby significantly improving the riding comfort and safety of passengers, especially facilitating passengers carrying wheelchairs, baby carriages and other equipment to enter and exit the elevator. In addition, the present invention is simple to implement, has a stable and reliable structure, strong anti-interference ability, is not easily affected by factors such as elevator running speed, acceleration, load, etc., and is easy to install without major changes to the existing elevator structure. It is suitable for various types of elevators and has good economic benefits and promotion and application value.

In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (10)

1. A method for accurate elevator landing, characterized in that the method comprises the following steps: Ⅰ. A position sensitive element is set within the door area of each floor in the elevator shaft, and the position sensitive element is used to convert the information of different positions of the elevator car within any door area into corresponding resistance values; Ⅱ. When the elevator car runs to the door area of the target floor, the detection probe installed on the elevator car contacts the position sensitive element within the door area of the target floor; III. The detection probe detects the resistance value change of the position sensitive element in real time, and sends the resistance value change signal to the elevator control system; IV. The elevator control system receives the resistance value change signal and determines the real-time position of the elevator car according to the resistance values of the elevator car at different positions within the door area of the target floor; V. The elevator control system controls the elevator host system to drive the elevator car to stop at the target stop position according to the real-time position of the elevator car. 2. The method for precise leveling and stopping of an elevator according to claim 1 is characterized in that the position sensitive element includes an insulating substrate and a plurality of resistor elements arranged on the insulating substrate, and the plurality of resistor elements are regularly arranged along the moving direction of the elevator car to form a resistor array, and the resistance value of the resistor array changes linearly with the movement of the elevator car within the door area. 3. The method for precise elevator leveling and parking according to claim 1 is characterized in that the position sensitive element is a sliding winding that cooperates with the detection probe to form a sliding rheostat. When the detection probe is electrically connected to the sliding winding within the door area of the target floor, the resistance value of the sliding rheostat changes linearly with the movement of the elevator car within the door area. 4. The method for precise elevator leveling and stopping according to claim 1, 2 or 3 is characterized in that a conductive wipe plate is also provided within the door area of each floor in the elevator shaft, and the conductive wipe plate is connected in series with a position sensitive element; the detection probe comprises a first detection probe for sliding contact with the position sensitive element and a second detection probe for sliding contact with the conductive wipe plate; when the first detection probe contacts the position sensitive element and the second detection probe contacts the conductive wipe plate, a resistance measurement circuit is formed to detect the real-time resistance value change of the position sensitive element. 5. The method for precise elevator leveling and parking according to claim 1 is characterized in that, in step II, when the elevator car approaches the target floor, the elevator car decelerates and controls the detection probe arranged on the elevator car to extend and contact with the position sensitive element within the door area of the target floor; when the detection probe is not in contact with the position sensitive element, the detection probe retracts and resets. 6. The method for precise leveling and parking of an elevator according to claim 5 is characterized in that the detection probe includes a rod, a spherical probe and a driving device, the driving device is installed on the elevator car and moves synchronously with the elevator car; the rod is installed on the driving device and is configured to rotate relative to the elevator car under the drive of the driving device; the spherical probe is installed at one end of the rod away from the elevator car, for contacting the position sensitive element. 7. The elevator leveling and precise parking method according to claim 5 or 6, characterized in that it also includes: a first detection contact, arranged on a moving path of the detection probe relative to the elevator car and electrically connected to the elevator control system; Wherein, when the detection probe is retracted and reset, the first detection contact obtains a first trigger signal and sends it to the elevator control system; If the elevator control system does not receive the first trigger signal after issuing the detection probe retraction and reset instruction, it outputs fault information. 8. The elevator leveling and precise parking method according to claim 7, characterized in that it also includes: a second detection contact, disposed on a moving path of the detection probe relative to the elevator car and electrically connected to the elevator control system; Wherein, when the detection probe is extended and contacts the position sensitive element, the second detection contact obtains a second trigger signal and sends it to the elevator control system; If the elevator control system does not receive the second trigger signal after issuing the detection probe extension instruction, it outputs fault information. 9. An elevator leveling and precise parking system, characterized by comprising: A sensing unit is arranged in the door area of each floor in the elevator shaft, and is used to convert information of different positions of the elevator car in the door area into corresponding resistance values; A detection unit is provided on the elevator car and is configured to contact the sensing unit of the target floor when the elevator car runs within the door zone of the target floor, and is used to detect the change of the resistance value of the sensing unit in real time; The main control unit is used to receive the resistance value change signal obtained by the detection unit, and determine the real-time position of the elevator car according to the preset resistance values of the elevator car at different positions within the door area of the target floor; Among them, the main control unit controls the elevator host system based on the deviation between the real-time position of the elevator car and the target parking position to achieve accurate parking of the elevator car. 10. The elevator leveling precise parking system according to claim 9, characterized in that it also includes a telescopic control device for controlling the movement of the detection unit between the working position and the stowed position; Wherein, the detection unit is in contact with the sensing unit when in the working position, and is away from the sensing unit when in the retracted position.