Elevator car position determining system and method

Abstract

The invention discloses an elevator car position determining system and method. Comprising a rotary encoder installed on a main shaft of a traction wheel, a band-type brake action detection device used for detecting the state of a band-type brake, a displacement calculation device arranged on an elevator car and used for calculating the displacement amount of the car, an elevator power supply used for supplying power, and a controller connected with the rotary encoder, the band-type brake action detection device and the displacement calculation device. And the elevator controller is electrically connected with the elevator power supply, and the displacement calculation device is electrically connected with the elevator power supply. By arranging the rotary encoder, the band-type brake action detection device, the displacement calculation device, the elevator power supply and the elevator controller, the problem that under the condition that the traction wheel is braked, the position of the lift car deviates due to the fact that the traction wheel slips or the steel wire rope stretches out and draws back is solved.

Description

Technical Field

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

[0002] At present, the elevator controller obtains the relative position information of the elevator car through the relative value rotary encoder installed on the elevator main shaft, and then determines the floor position of the car by comparing the floor height data table pre-set on the elevator controller. When the elevator suddenly fails or loses power while running at high speed, the elevator will stop suddenly, and the brake will hold the main machine tightly. At this time, the wire rope will slip on the traction wheel, causing the car position to change from the position recorded on the elevator controller when the brake holds the main machine. For ordinary passenger elevators, the elevator can be corrected by running slowly to the bottom or top floor until it hits the limit switch, and the passengers feel that the elevator is sliding and become more panic. GB / T 26465-2021 "Safety Specifications for the Manufacture and Installation of Firefighters' Elevators" 5.10 requires: If the firefighter elevator needs to move to determine the location of the car, it should run no more than one floor toward the firefighter entrance floor and display the location of the car. Therefore, this method also cannot meet the requirements of GB / T 26465-2021 "Safety Specifications for the Manufacture and Installation of Firefighters' Elevators" 5.10.

[0003] After the elevator stops at the leveling floor, the wire rope expands and contracts due to the entry and exit of passengers, so that the leveling accuracy of the elevator car cannot meet the requirements of GB / T 10058-2009 "Technical Conditions for Elevators".

[0004] With the development of electronic safety technology, the shaft scale can be used to detect the absolute position of the car, which can solve the above problems. However, the shaft scale solution has shortcomings such as complex mechanical structure and high cost. Summary of the invention

[0005] The purpose of the present invention is to provide an elevator car position determination system and method to solve the technical defect that the car position cannot be determined in real time using the signal of a rotary encoder installed on the main shaft when the wire rope slips on the traction wheel or the wire rope stretches and contracts.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An elevator car position determination system comprises a rotary encoder installed on a traction wheel main shaft, a brake action detection device for detecting a brake state, a displacement calculation device arranged on the elevator car for calculating a displacement of the car, an elevator power supply for powering, and an elevator controller electrically connected to the rotary encoder, the brake action detection device, the displacement calculation device and the elevator power supply, wherein the displacement calculation device is electrically connected to the elevator power supply.

[0008] Further, the displacement calculation device includes an acceleration sensor, a displacement calculation unit, a power supply module, a power-off storage module, and a communication module;

[0009] The displacement calculation device starts to calculate the displacement of the car according to the acceleration sensor data after receiving the instruction of the elevator controller;

[0010] The power supply module supplies power to the displacement calculation device for a period of time when the external power supply is disconnected, so that the displacement calculation device completes the car position calculation;

[0011] The power-off storage module is used to store the car displacement data in the event of a power failure;

[0012] The communication module is used to send the car displacement data to the elevator controller.

[0013] A method for determining the position of an elevator car comprises the following steps:

[0014] S1. When the elevator is running at high speed, the external power supply is cut off and the elevator stops suddenly;

[0015] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0016] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upper direction is positive, and the displacement in the lower direction is negative, until the car speed is detected to be 0, and the car displacement is stored in the power-off storage module;

[0017] S4. The elevator external power supply is restored, and the elevator controller sends a command to the displacement calculation device to query the displacement data;

[0018] S5. After receiving the displacement data from the displacement calculation device, the elevator controller corrects the position data of the car.

[0019] A method for determining the position of an elevator car comprises the following steps:

[0020] S1. The elevator fails when running at high speed and stops suddenly;

[0021] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0022] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0;

[0023] S4. The elevator controller sends a command to the displacement calculation device to query the displacement data;

[0024] S5. The elevator controller sends a command to the displacement calculation device to query the displacement data.

[0025] A method for determining the position of an elevator car comprises the following steps:

[0026] S1. The elevator responds to the call and runs to the calling floor, stops and opens the door;

[0027] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0028] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0;

[0029] S4. The elevator controller periodically sends instructions to the displacement calculation device to query the displacement data. When the queried displacement data is greater than the leveling accuracy threshold, the elevator is controlled to perform re-leveling operation.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention solves the problem of deviation of the car position caused by the slip of the wire rope on the traction wheel or the expansion and contraction of the wire rope when the traction wheel is stopped by arranging a rotary encoder, a brake action detection device, a displacement calculation device, an elevator power supply and an elevator controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a schematic diagram of the logic block diagram of the present invention;

[0035] Figure 3 It is a schematic diagram of the displacement calculation device of the present invention;

[0036] Figure 4 This is a schematic diagram of a logic block diagram of Embodiment 1 of the present invention;

[0037] Figure 5This is a schematic diagram of a logic block diagram of Embodiment 2 of the present invention;

[0038] Figure 6 This is a schematic diagram of the logic block diagram of Example 3 of the present invention. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1

[0041] like Figure 1-4 As shown, a system for determining the position of an elevator car comprises a rotary encoder installed on a main shaft of a traction wheel, a brake action detection device for detecting a brake state, a displacement calculation device arranged on the elevator car for calculating a displacement of the car, an elevator power supply for powering, and an elevator controller electrically connected to the rotary encoder, the brake action detection device, the displacement calculation device, and the elevator power supply, wherein the displacement calculation device is electrically connected to the elevator power supply.

[0042] Specifically, the displacement calculation device includes an acceleration sensor, a displacement calculation unit, a power supply module, a power-off storage module, and a communication module;

[0043] The displacement calculation device starts to calculate the displacement of the car according to the acceleration sensor data after receiving the instruction of the elevator controller;

[0044] The power supply module supplies power to the displacement calculation device for a period of time when the external power supply is disconnected, so that the displacement calculation device completes the car position calculation;

[0045] The power-off storage module is used to store the car displacement data in the event of a power failure;

[0046] The communication module is used to send the car displacement data to the elevator controller.

[0047] The situation in this embodiment is that the external power supply is cut off when the elevator is running at high speed, as follows:

[0048] A method for determining the position of an elevator car comprises the following steps:

[0049] S1. When the elevator is running at high speed, the external power supply is cut off and the elevator stops suddenly;

[0050] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0051] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upper direction is positive, and the displacement in the lower direction is negative, until the car speed is detected to be 0, and the car displacement is stored in the power-off storage module;

[0052] S4. The elevator external power supply is restored, and the elevator controller sends a command to the displacement calculation device to query the displacement data;

[0053] S5. After receiving the displacement data from the displacement calculation device, the elevator controller corrects the position data of the car.

[0054] Example 2

[0055] Reference Figure 5 , which is different from Example 1, in this embodiment, the situation is that a fault occurs when the elevator is running at high speed, as follows:

[0056] A method for determining the position of an elevator car comprises the following steps:

[0057] S1. The elevator fails when running at high speed and stops suddenly;

[0058] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0059] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0;

[0060] S4. The elevator controller sends a command to the displacement calculation device to query the displacement data;

[0061] S5. The elevator controller sends a command to the displacement calculation device to query the displacement data.

[0062] Example 3

[0063] Reference Figure 6 , which is different from Example 1, in this example, when the elevator responds to a call to stop and open the door, the steel wire rope is stretched and shortened due to the passengers entering and exiting, and the car leveling accuracy cannot meet the requirements of GB / T 10058-2009 "Technical Conditions for Elevators", as follows:

[0064] A method for determining the position of an elevator car comprises the following steps:

[0065] S1. The elevator responds to the call and runs to the calling floor, stops and opens the door;

[0066] S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement;

[0067] S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0;

[0068] S4. The elevator controller periodically sends instructions to the displacement calculation device to query the displacement data. When the queried displacement data is greater than the leveling accuracy threshold, the elevator is controlled to perform re-leveling operation.

[0069] The present invention solves the problem of deviation of the car position caused by the slip of the wire rope on the traction wheel or the expansion and contraction of the wire rope when the traction wheel is stopped by arranging a rotary encoder, a brake action detection device, a displacement calculation device, an elevator power supply and an elevator controller.

[0070] 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 principle of the present invention should be included in the protection scope of the present invention.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An elevator car position determination system, characterized in that: The invention comprises a rotary encoder installed on the main shaft of the traction wheel, a brake action detection device for detecting the brake state, a displacement calculation device arranged on the elevator car for calculating the displacement of the car, an elevator power supply for powering, and an elevator controller electrically connected to the rotary encoder, the brake action detection device, the displacement calculation device and the elevator power supply, wherein the displacement calculation device is electrically connected to the elevator power supply.

2. An elevator car position determination system according to claim 1, characterized in that: The displacement calculation device includes an acceleration sensor, a displacement calculation unit, a power supply module, a power-off storage module, and a communication module; The displacement calculation device starts to calculate the displacement of the car according to the acceleration sensor data after receiving the instruction of the elevator controller; The power supply module supplies power to the displacement calculation device for a period of time when the external power supply is disconnected, so that the displacement calculation device completes the car position calculation; The power-off storage module is used to store the car displacement data in the event of a power failure; The communication module is used to send the car displacement data to the elevator controller.

3. The method of the elevator car position determination system according to any one of claims 1-2, characterized in that: The following steps are involved: S1. When the elevator is running at high speed, the external power supply is cut off and the elevator stops suddenly; S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement; S3. The displacement calculation device calculates the displacement of the car, the displacement in the upper direction is positive, and the displacement in the lower direction is negative, until the car speed is detected to be 0, and the car displacement is stored in the power-off storage module; S4. The elevator external power supply is restored, and the elevator controller sends a command to the displacement calculation device to query the displacement data; S5. After receiving the displacement data from the displacement calculation device, the elevator controller corrects the position data of the car.

4. The method of the elevator car position determination system according to any one of claims 1-2, characterized in that: The following steps are involved: S1. The elevator fails when running at high speed and stops suddenly; S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement; S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0; S4. The elevator controller sends a command to the displacement calculation device to query the displacement data; S5. The elevator controller sends a command to the displacement calculation device to query the displacement data.

5. The method of the elevator car position determination system according to any one of claims 1-2, characterized in that: The following steps are involved: S1. The elevator responds to the call and runs to the calling floor, stops and opens the door; S2. The elevator controller detects that the brake is tightened through the brake detection device, and the elevator controller records the car position data at this time, and at the same time instructs the displacement calculation device to start calculating the car displacement; S3. The displacement calculation device calculates the displacement of the car, the displacement in the upward direction is positive, and the displacement in the downward direction is negative, until the car speed is detected to be 0; S4. The elevator controller periodically sends instructions to the displacement calculation device to query the displacement data. When the queried displacement data is greater than the leveling accuracy threshold, the elevator is controlled to perform re-leveling operation.

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