Elevator car position detection system

Abstract

The present invention discloses an elevator car position detection system, comprising: an elevator speed limiter, a speed sensor, an elevator car position calculation device, and a backup power supply; the speed sensor monitors the status of the elevator speed limiter and transmits the monitoring data to the elevator car position calculation device, and the elevator car position calculation device calculates the position and speed of the elevator car based on the monitoring data; the backup power supply is electrically connected to the elevator car position calculation device and the speed sensor, and provides power to the elevator car position calculation device and the speed sensor when the elevator system loses power unexpectedly. The elevator car position calculation device has an input and output interface, and exchanges data with external devices through the input and output interface. The present invention can achieve low cost and low maintenance, and can still accurately know the elevator car position in the event of an elevator power outage.

Description

Technical Field

[0001] The present invention belongs to the technical field of elevators, and in particular relates to an elevator car position detection system. Background Art

[0002] There are two main purposes for obtaining the position of the elevator car in the elevator field: one is car rescue. When an elevator malfunctions and passengers in the elevator car are rescued, the specific position of the elevator car in the elevator shaft can be quickly understood by identifying the car position information, so that appropriate rescue actions can be carried out; the other is elevator debugging. During elevator debugging and maintenance, it is necessary to understand the specific position of the elevator car in the elevator shaft so that corresponding actions can be taken to operate the elevator.

[0003] There are currently two commonly used methods for obtaining the position of an elevator car: Method 1, using paint to mark the relative position of the car on the wire rope, so that the elevator stops at different floors in sequence, and when the elevator stops, the floors are marked with paint on the wire rope in sequence. The construction efficiency of this method is low, and due to the friction between the wire rope and the wheel groove during daily operation, the paint marks are easily worn off, and frequent repainting is required during maintenance, resulting in high subsequent maintenance costs. Method 2, the shaft information system, in some elevators using magnetic scales, the relative position of the car in the shaft can be read by a dedicated device. This method has a high system cost, and the elevator must be powered on during use, otherwise the function will fail. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: how to achieve low cost and low maintenance, and still accurately know the position of the elevator car when the elevator loses power.

[0005] The present invention provides an elevator car position detection system, comprising:

[0006] Elevator speed limiter, speed sensor, elevator car position calculation device and backup power supply;

[0007] The speed sensor monitors the state of the elevator speed governor and transmits the monitoring data to the elevator car position calculation device, and the elevator car position calculation device calculates the position and speed of the elevator car based on the monitoring data;

[0008] The backup power supply is electrically connected to the elevator car position calculation device and the speed sensor, and provides power to the elevator car position calculation device and the speed sensor when the elevator system loses power unexpectedly.

[0009] The elevator car position calculation device has an input and output interface, and exchanges data with external equipment through the input and output interface.

[0010] Preferably, the elevator speed governor is an electronic speed governor or a mechanical speed governor.

[0011] Preferably, the speed sensor is an encoder, which is used to convert the state of the elevator speed limiter into an electrical signal and output it to the elevator car position calculation device.

[0012] Preferably, the method for calculating the elevator car position or speed by the elevator car position calculation device is set by an external device.

[0013] Preferably, the external device is a mobile device.

[0014] Preferably, the elevator car position calculation device has pre-stored setting data; the elevator car position calculation device modifies the pre-stored setting data according to the calculated position and speed of the elevator car.

[0015] Preferably, the elevator car position detection system further includes a speed limiter triggering device; the elevator car position calculating device has a pre-stored car position setting range; when the elevator car position calculating device detects that the car position exceeds the set range, the elevator car position calculating device outputs a trigger signal to cause the speed limiter triggering device to trigger the elevator speed limiter.

[0016] Preferably, the elevator car position calculation device has a pre-stored car speed threshold; when the elevator car position calculation device detects that the car speed exceeds the threshold, the elevator car position calculation device outputs an elevator overspeed signal.

[0017] Preferably, the elevator car position calculation device analyzes historical data of the position and speed of the elevator car and outputs the operating status and maintenance status of the elevator.

[0018] Preferably, the input and output interface includes one or more of a human-machine interface, a communication interface, or an electrical signal interface.

[0019] Compared to existing technologies, this invention requires virtually no construction during elevator installation and maintenance. Elevator car position information is clearer and more accurate than existing wire rope painting methods, and the cost is lower than existing hoistway information systems. Furthermore, this system can be independent of the elevator system as a standalone module, or it can be integrated into the system.

[0020] The main structure of this system is located in the machine room during application. Through its input and output interfaces, it can be connected to other devices such as human-machine interfaces. Other devices can be located in the machine room or in other easily observable locations (for machine-room-less elevators), enabling information exchange with other common devices. The position of the elevator car can be obtained from any location. This application method is particularly convenient for machine-room-less elevators.

[0021] This system can not only provide the status (position, speed) information of the elevator car, but also realize the human-computer interaction of this information and the information interaction with other devices, thereby realizing other additional value-added functions.

[0022] Since the system is equipped with a backup power supply, the slip of the elevator car can be detected when the elevator system is not running (power outage or shutdown state), and different strategies can be adopted to ensure the safety of the elevator.

[0023] Based on this system, an overspeed protection device independent of the elevator system can also be built. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the elevator car position detection system. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific embodiments in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be based on different viewpoints and applications. Those skilled in the art can make various similar generalizations and substitutions without departing from the spirit of the present invention.

[0026] like Figure 1 As shown, this specific embodiment provides an elevator car position detection system, comprising:

[0027] Elevator speed limiter, speed sensor, elevator car position calculation device and backup power supply.

[0028] The elevator speed governor is driven by a speed governor wire rope, which is directly connected to the car and can accurately reflect the displacement of the car. The elevator speed governor is an electronic speed governor or a mechanical speed governor.

[0029] The speed sensor monitors the status of the elevator speed governor and transmits the monitoring data to the elevator car position calculation device, which calculates the position and speed of the elevator car based on the obtained monitoring data.

[0030] The elevator car position calculation device has an input and output interface, and exchanges data with external equipment through the input and output interface.

[0031] The input and output interface includes one or more of a human-machine interface, a communication interface, or an electrical signal interface.

[0032] The backup power supply is a device that provides backup power for the elevator car position calculation device and speed sensor when power is accidentally cut off.

[0033] Preferably, the speed sensor is an encoder, which can convert the state of the elevator speed governor into an electrical signal and output it to the elevator car position calculation device.

[0034] Preferably, the external device is a mobile device (mobile phone, PAD, etc.) that can exchange data with the elevator car position calculation device through the input and output interface of the elevator car position calculation device, and can set the position, movement speed and calculation method of the elevator car.

[0035] Operators can easily obtain the elevator car's position and movement status through a mobile device's human-machine interface (using audio, visual, and electrical methods). Furthermore, the mobile device can be conveniently placed, making it easier for operators to operate. This convenience is particularly prominent in machine-room-less elevators, as the exact position of the elevator car can be determined without having to look through the elevator shaft's observation window. The elevator car's movement speed, previously difficult to obtain using other devices, can now be easily acquired. Interactive methods such as the mobile device's screen, audio broadcast, and voice commands greatly facilitate operator operations.

[0036] The elevator car position calculation device determines the position and motion state of the elevator car through the data input by the speed sensor and the pre-stored setting data, and can also reversely correct the pre-stored setting data. For example:

[0037] Consider an elevator with four floors. The cumulative encoder count for each floor is 10,000. The encoder count for floor 1 is set to 0, for floor 2 to 10,000, for floor 3 to 20,000, and for floor 4 to 30,000. Due to the slip error of the elevator's speed limiter, the actual encoder counts for each floor will deviate from the set values ​​over time. The elevator car position calculation device can then make corrections based on the actual leveling position of the elevator. Typically, this correction is made using the average encoder counts from multiple leveling attempts. This allows for deviation correction and self-learning of the elevator car position.

[0038] The system is equipped with a backup battery, so when the device loses power unexpectedly, the device can still work normally.

[0039] Preferably, the elevator car position detection system also includes a speed limiter triggering device. The elevator car position calculation device has a pre-stored car position setting range. When the elevator car position exceeds the set range, the elevator car position calculation device can output a trigger signal to cause the speed limiter triggering device to trigger the speed limiter, which further triggers the elevator braking device (such as a safety clamp), thereby limiting the further movement of the elevator car. This protection can cope with the following elevator failure conditions:

[0040] When the elevator has no power and the elevator brake fails, causing the elevator car to slip unexpectedly, this device can effectively play a monitoring and protection role.

[0041] Preferably, based on the combination of the elevator car position and the elevator movement speed data, the elevator car position calculation device can also output an overspeed signal at a specific position, independently realize the function of the elevator up / down overspeed protection device, and further improve the safety of the elevator.

[0042] Preferably, the operation status and maintenance status of the elevator can be collected by analyzing historical data and real-time data of the elevator car position calculation device.

[0043] This invention requires virtually no construction during elevator installation and maintenance. It provides clearer and more accurate elevator car location information than existing wire rope painting methods, and is less expensive than existing hoistway information systems. Furthermore, this system can be independent of the elevator system as a standalone module or integrated into the system.

[0044] The main structure of this device is located in the machine room during operation. Through the system's input and output interfaces, it can be connected to other devices such as human-machine interfaces. These other devices can be located in the machine room or in other easily observable locations (for machine-room-less elevators), enabling information exchange with other common devices. The position of the elevator car can be obtained from any location. This application method is particularly convenient for machine-room-less elevators.

[0045] This system can not only provide the status (position, speed) information of the elevator car, but also realize the human-computer interaction of this information and the information interaction with other devices, thereby realizing other additional value-added functions.

[0046] Since the system is equipped with a backup power supply, the slip of the elevator car can be detected when the elevator system is not running (power outage or shutdown state), and different strategies can be adopted to ensure the safety of the elevator.

[0047] Based on this system, an overspeed protection device independent of the elevator system can also be built.

[0048] The present invention can achieve the following functions: first, obtain the position and movement speed of the elevator car in the elevator shaft, and provide relevant information for elevator installation, maintenance and rescue; second, realize the information exchange between the elevator car position information and the operator; third, realize the information exchange between this device and other equipment, and the additional value-added effects generated are as follows:

[0049] 1. Information interaction with the elevator can achieve redundancy of elevator safety protection and improve elevator safety;

[0050] 2. Information interaction with other devices can realize the prediction of elevator overspeed protection and the collection of elevator operation status data;

[0051] 3. By connecting a mobile device to this device, accurate information on the elevator car's location can be obtained at any occasion / location, greatly facilitating the operation of elevator installation and maintenance personnel, especially for machine room-less elevators;

[0052] 4. An overspeed protection device independent of the elevator system can be built;

[0053] 5. When the elevator is shut down or there is an unexpected power outage, the accidental slip of the elevator car can still be detected and corresponding protective measures can be taken.

[0054] The present invention has been described in detail above through specific embodiments. The above embodiments are merely preferred embodiments of the present invention and the present invention is not limited to the above embodiments. Without departing from the principles of the present invention, equivalent substitutions and improvements made by those skilled in the art should be considered within the technical scope protected by the present invention.

Claims

1. An elevator car position detection system, characterized in that: include: Elevator speed limiter, speed sensor, elevator car position calculation device and backup power supply; The speed sensor monitors the state of the elevator speed governor and transmits the monitoring data to the elevator car position calculation device, and the elevator car position calculation device calculates the position and speed of the elevator car based on the monitoring data; The backup power supply is electrically connected to the elevator car position calculation device and the speed sensor, and provides power to the elevator car position calculation device and the speed sensor when the elevator system loses power unexpectedly; The elevator car position calculation device has an input and output interface, and exchanges data with external equipment through the input and output interface.

2. The elevator car position detection system according to claim 1, wherein: The elevator speed governor is an electronic speed governor or a mechanical speed governor.

3. The elevator car position detection system according to claim 1, wherein: The speed sensor is an encoder, which is used to convert the state of the elevator speed limiter into an electrical signal and output it to the elevator car position calculation device.

4. The elevator car position detection system according to claim 1, wherein: The method for calculating the elevator car position or speed by the elevator car position calculation device is set by an external device.

5. The elevator car position detection system according to claim 1, wherein: The external device is a mobile device.

6. The elevator car position detection system according to claim 1, wherein: The elevator car position calculation device has pre-stored setting data; The elevator car position calculation device amends the pre-stored setting data according to the calculated position and speed of the elevator car.

7. The elevator car position detection system according to claim 1, wherein: The elevator car position detection system also includes a speed limiter triggering device; The elevator car position calculation device has a pre-stored car position setting range; When the elevator car position calculation device detects that the car position exceeds a set range, the elevator car position calculation device outputs a trigger signal to enable the speed limiter triggering device to trigger the elevator speed limiter to operate.

8. The elevator car position detection system according to claim 1, wherein: The elevator car position calculation device has a pre-stored car speed threshold; When the elevator car position calculation device detects that the car speed exceeds a threshold, the elevator car position calculation device outputs an elevator overspeed signal.

9. The elevator car position detection system according to claim 1, wherein: The elevator car position calculation device analyzes the historical data of the position and speed of the elevator car and outputs the operating status and maintenance status of the elevator.

10. The elevator car position detection system according to claim 1, wherein: The input and output interface includes one or more of a human-machine interface, a communication interface, or an electrical signal interface.

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