System and method for detecting position of lift car of dumb waiter

Abstract

The invention discloses a dumb waiter car position detection system and method.The dumb waiter car position detection system comprises a main board, a top layer control board, a middle layer control board and a bottom layer control board which are arranged in a hoistway at intervals from top to bottom; the main board is sequentially connected with the top layer control board, the middle layer control board and the bottom layer control board through a hoistway cable and a MODBUS serial communication cable, and an upper leveling switch and a lower leveling switch are installed on a guide rail at the leveling position of each floor in an up-down mode. The upper leveling switch and the lower leveling switch are connected to the top layer control panel, the middle layer control panel and the bottom layer control panel through extension cables, and the top layer control panel, the middle layer control panel and the bottom layer control panel are connected with the outbound display panel through MODBUS serial communication cables. The position detection of the single-speed dumb waiter is realized by adopting the leveling switch mounted in the hoistway.

Description

Technical Field

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

[0002] General elevators rely on two signal detection devices, the leveling switch (upper leveling switch and lower leveling switch) installed on the car roof and the rotary encoder installed on the traction machine shaft, to detect the position of the car. It requires a frequency converter and a PG card for signal acquisition and processing. In general, a cargo elevator uses a single-speed drive mode and does not require a frequency converter drive, so the above method cannot be used for position detection. Summary of the invention

[0003] The object of the present invention is to provide a system and method for detecting the position of a cargo elevator car, which realizes the position detection of a single-speed cargo elevator by adopting a leveling switch installed in a hoistway.

[0004] The technical solution of the present invention is as follows:

[0005] A cargo elevator car position detection system comprises a main board, a top-layer control board, a middle-layer control board and a bottom-layer control board which are arranged in a shaft from top to bottom at intervals, the main board is connected to the top-layer control board, the middle-layer control board and the bottom-layer control board in sequence through a shaft cable and a MODBUS serial communication cable, an upper leveling switch and a lower leveling switch are installed up and down on the guide rails at the leveling position of each floor, the upper leveling switch and the lower leveling switch are connected to the top-layer control board, the middle-layer control board and the bottom-layer control board through extension cables, and the top-layer control board, the middle-layer control board and the bottom-layer control board are connected to an outbound call display panel through a MODBUS serial communication cable.

[0006] Furthermore, an upper limit switch is installed on the guide rail at the topmost limit position, and the upper limit switch is connected to the top control panel through an extension cable.

[0007] Furthermore, a lower limit switch is installed on the guide rail at the bottom limit position, and the lower limit switch is connected to the bottom control board through an extension cable.

[0008] Furthermore, an indicator light is provided on the outbound call display panel.

[0009] A method for detecting the position of a cargo elevator car:

[0010] When the car is at the bottom leveling position, the upper leveling switch and the lower leveling switch at one end of the bottom control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the bottom control panel lights up;

[0011] When the car is at the middle leveling position, the upper leveling switch and the lower leveling switch at one end of the middle level control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the middle level control panel lights up;

[0012] When the car is at the top leveling position, the upper leveling switch and the lower leveling switch at one end of the top control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the top control panel lights up.

[0013] Compared with the prior art, the beneficial effect of the present invention is that: the present invention arranges a main board, a top-layer control board, a middle-layer control board and a bottom-layer control board in intervals from top to bottom in the hoistway, and the main board is connected to the top-layer control board, the middle-layer control board and the bottom-layer control board in sequence through the hoistway cable and the MODBUS serial communication cable, and one end of the top-layer control board, the middle-layer control board and the bottom-layer control board are all installed with an upper leveling switch and a lower leveling switch, and the other ends of the top-layer control board, the middle-layer control board and the bottom-layer control board are connected to the outbound call display board for communication. When the car is at the bottom / middle / top leveling position, the upper leveling switch and the lower leveling switch at one end detect the leveling partition installed on the car, and the corresponding indicator light of the outbound call display board lights up, thereby indicating the position of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 work.

[0015] Figure 1 It is a schematic diagram of the system composition of the present invention;

[0016] Figure 2 It is a schematic diagram of the elevator running position of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0019] Example

[0020] See also Figure 1The present embodiment provides a position detection system for a goods elevator car, comprising a main board, a top-layer control board, a middle-layer control board and a bottom-layer control board arranged in a shaft from top to bottom, the main board is connected to the top-layer control board, the middle-layer control board and the bottom-layer control board in sequence through a shaft cable and a MODBUS serial communication cable, an upper leveling switch and a lower leveling switch are installed on the guide rails of the leveling position of each floor, the upper leveling switch and the lower leveling switch are connected to the top-layer control board, the middle-layer control board and the bottom-layer control board through extension cables, and the top-layer control board, the middle-layer control board and the bottom-layer control board are connected to the outbound call display board through the MODBUS serial communication cable.

[0021] Among them, an upper limit switch is installed on the guide rail at the top limit position, and the upper limit switch is connected to the top control panel through an extension cable.

[0022] Among them, a lower limit switch is installed on the guide rail at the limit position of the lowest layer, and the lower limit switch is connected to the bottom control board through an extension cable.

[0023] Wherein, an indicator light is provided on the outbound call display panel, through which the position of the elevator is indicated.

[0024] The system can realize the position detection of single-speed goods elevator by adopting the leveling switch installed in the hoistway.

[0025] Specific method for detecting the position of the elevator car, such as Figure 2 As shown:

[0026] When the car is at the bottom leveling position, the upper leveling switch and the lower leveling switch at one end of the bottom control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the bottom control panel lights up, indicating that the elevator is at the bottom leveling position;

[0027] When the car is at the middle leveling position, the upper leveling switch and the lower leveling switch at one end of the middle leveling control panel detect the leveling partition installed on the car, and the indicator light on the call display panel corresponding to the middle leveling control panel lights up, indicating that the elevator is at the middle leveling position;

[0028] When the car is at the top leveling position, the upper leveling switch and the lower leveling switch at one end of the top control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the top control panel lights up, indicating that the elevator is at the top leveling position.

[0029] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A system for detecting the position of a cargo elevator car, characterized in that: It includes a main board, a top-layer control board, a middle-layer control board and a bottom-layer control board which are arranged in a shaft from top to bottom. The main board is connected with the top-layer control board, the middle-layer control board and the bottom-layer control board in sequence through a shaft cable and a MODBUS serial communication cable. An upper leveling switch and a lower leveling switch are installed on the guide rails at the leveling position of each floor. The upper leveling switch and the lower leveling switch are connected to the top-layer control board, the middle-layer control board and the bottom-layer control board through extension cables. The top-layer control board, the middle-layer control board and the bottom-layer control board are connected to an outbound call display panel through a MODBUS serial communication cable.

2. A cargo elevator car position detection system according to claim 1, characterized in that: An upper limit switch is installed on the guide rail at the top limit position, and the upper limit switch is connected to the top control board through an extension cable.

3. A cargo elevator car position detection system according to claim 1, characterized in that: A lower limit switch is installed on the guide rail at the bottom limit position, and the lower limit switch is connected to the bottom control board through an extension cable.

4. A cargo elevator car position detection system according to claim 1, characterized in that: The outbound call display panel is provided with an indicator light.

5. The method for detecting the position of a cargo elevator car of a cargo elevator car position detection system according to claim 4, characterized in that: When the car is at the bottom leveling position, the upper leveling switch and the lower leveling switch at one end of the bottom control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the bottom control panel lights up; When the car is at the middle leveling position, the upper leveling switch and the lower leveling switch at one end of the middle level control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the middle level control panel lights up; When the car is at the top leveling position, the upper leveling switch and the lower leveling switch at one end of the top control panel detect the leveling partition installed on the car, and the indicator light on the outbound call display panel corresponding to the top control panel lights up.

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