Elevator car height detection structure based on laser ranging

Abstract

The utility model relates to the technical field of elevator equipment, in particular to an elevator car height detection structure based on laser ranging. According to the technical scheme, the device comprises a laser ranging sensor fixedly arranged at the top of an elevator car and a reflection component fixedly arranged at the top of an elevator shaft; a dust removing device is arranged on one side of the laser distance measuring sensor and used for removing dust on the upper end face of the laser distance measuring sensor. The device has the beneficial effects that the laser distance measuring sensor is arranged at the top of the elevator car and is matched with the reflecting component arranged at the top in the elevator shaft, so that the distance between the elevator car and the top of the elevator shaft can be accurately detected in real time, and the height of a floor where the elevator car is located is determined; a dust removing device and a protective shell are matched, so that the detection accuracy of the laser distance measuring sensor on the height of the elevator car can be effectively ensured; and sensors do not need to be mounted on each floor, so that the mounting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, and in particular to an elevator car height detection structure based on laser ranging. Background Technology

[0002] Currently, elevators primarily rely on photoelectric sensors installed at corresponding locations on each floor within the elevator shaft during operation. Specifically, the sensors used in elevators are photoelectric level sensors, which detect the height of the elevator car to obtain its height information. However, this method requires installation on every floor, demands high precision in sensor installation, necessitates highly skilled installation personnel, and necessitates the installation of a magnetic shielding plate on the top of the elevator car for this structure to be effective. Utility Model Content

[0003] The purpose of this invention is to provide an elevator car height detection structure based on laser ranging, specifically an elevator car height detection structure that is easy to install and efficient.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an elevator car height detection structure based on laser ranging, comprising a laser ranging sensor fixedly installed on the top of the elevator car and a reflective component fixedly installed on the top of the elevator shaft; a dust removal device is provided on one side of the laser ranging sensor, the dust removal device being used to remove dust from the upper surface of the laser ranging sensor.

[0005] Specifically, the dust removal device includes a linear drive mechanism and a cleaning head, with the linear drive mechanism being driven and connected to the cleaning head.

[0006] Specifically, the linear drive mechanism uses an electric actuator.

[0007] Furthermore, the laser rangefinder and dust removal device are provided with a protective housing, and the upper end of the protective housing is provided with a detection opening.

[0008] Preferably, the number of laser rangefinders is two, three, or four, and they are arranged in an equidistant circular array relative to the center of the top of the elevator car.

[0009] Preferably, a buffer pad is provided between the laser rangefinder and the top of the elevator car.

[0010] The beneficial effects of this utility model are as follows: by setting a laser rangefinder sensor on the top of the elevator car, and in conjunction with a reflective component set on the top of the elevator shaft, the distance between the elevator car and the top of the elevator shaft can be detected in real time and accurately, thereby determining the floor height of the elevator car; in conjunction with a dust removal device and a protective shell, the accuracy of the laser rangefinder sensor in detecting the height of the elevator car can be effectively ensured; and there is no need to install a sensor on each floor, thus improving installation efficiency. Attached Figure Description

[0011] Appendix Figure 1 This is an overall installation structure diagram of the elevator car height detection structure based on laser ranging in Example 1 or 2;

[0012] Appendix Figure 2 For the appendix Figure 1 Enlarged view of part A in the middle;

[0013] Appendix Figure 3 This is a schematic diagram of four laser ranging sensors distributed on the top of the elevator car in Example 2. Detailed Implementation

[0014] Example 1, referring to Figure 1-2 A laser ranging-based elevator car height detection structure includes a laser ranging sensor 1 fixedly installed on the top of the elevator car 10 and a reflective component 2 fixedly installed on the top of the elevator shaft 20; a dust removal device 3 is provided on one side of the laser ranging sensor 1, and the dust removal device 3 is used to remove dust from the upper surface of the laser ranging sensor 1.

[0015] In this embodiment, the laser rangefinder 1 is fixedly installed on the top of the elevator car 10. The laser rangefinder 1 detects the distance between the laser rangefinder 1 and the reflective component 2 by emitting laser pulse signals to the reflective component 2 at the top of the elevator shaft 20 and receiving the laser pulse signals reflected back from the emitting component 2. This allows the laser rangefinder 1 to determine the floor height of the elevator car 10. Because the laser rangefinder 1 has a fast detection speed and high detection accuracy, it can effectively realize the real-time detection of the height of the elevator car 10. It can not only quickly determine the floor of the elevator car 10, but also determine whether the elevator car 10 is running stably by whether there is a rapid jitter change in the height position of the elevator car 10 detected by the laser rangefinder 1. This enables the monitoring of the operating status of the elevator car 10. In addition, to prevent dust from covering the laser emitting and receiving components on the upper surface of the laser rangefinder 1 due to prolonged use and affecting its normal detection, a dust removal device 3 is provided on the upper surface of the laser rangefinder 1. The dust removal device 3 can be set to periodically remove dust from the surface of the laser rangefinder 1, or it can determine whether to activate the dust removal device 3 to clean the upper surface of the laser rangefinder 1 by detecting whether the laser signal received by the laser rangefinder 1 is interfered with. The laser rangefinder 1 and the dust removal device 3 can be powered by a power supply within the elevator car 10. Specifically, in this embodiment, the dust removal device 3 adopts the following structure: it includes a linear drive mechanism 31 and a cleaning head 32. The linear drive mechanism 31 is driven and connected to the cleaning head 32, and the linear drive mechanism 31 is preferably an electric push rod. The electric push rod drives the cleaning head 32 to reciprocate on the upper surface of the laser rangefinder 1 to clean the laser rangefinder 1. The cleaning head 32 can be a cleaning sponge or a cleaning brush, etc. In addition, a buffer pad 11 is provided between the laser rangefinder 1 and the top of the elevator car 10. The buffer pad 11 can buffer and protect the laser rangefinder 1, improving the stability of its operation. Preferably, to further protect the laser rangefinder 1, a protective shell 4 is provided outside the laser rangefinder 1 and the dust removal device 3. The upper end of the protective shell 4 is provided with a detection opening 41. Furthermore, it should be noted that the microcontroller controller used for distance data acquisition and dust removal control in connection with the laser rangefinder 1 and the dust removal device 3 can be housed within the protective shell 4 or within the elevator car 10.

[0016] In this embodiment, by employing a laser rangefinder 1 with a reflection offset detection function, the vibration occurring during the operation of the elevator car 10 can be detected by collecting the reflection offset of the laser rangefinder 1, thereby achieving further detection of the operating status of the elevator car 10.

[0017] In Example 2, in Example 1, there was only one laser ranging sensor 1. However, in this example, to further improve the accuracy of detecting the height position and operating status of the elevator car 10, the number of laser ranging sensors 1 is increased to two, three, or four, arranged in an equidistant circular array relative to the center of the top of the elevator car 10. For example, if two laser ranging sensors 1 are set, they can be placed at diagonally opposite corners of the top of the elevator car 10; if four laser sensors 1 are set, they can be placed at the four diagonal corners of the top of the elevator car 10. The attached diagram shows a schematic diagram of the distribution of four laser ranging sensors. By setting multiple laser ranging sensors 1, the accuracy of detecting the height of the elevator car 10 can be improved by averaging the distances measured by multiple laser ranging sensors 1. Furthermore, when the elevator car 10 tilts, the degree of tilt can be detected by multiple laser ranging sensors 1. When the difference in distances measured by multiple laser ranging sensors 1 exceeds a set threshold, the elevator alarm system can be triggered, indicating that the elevator may be in a faulty state, facilitating timely judgment of the elevator's operating status.

[0018] Of course, the above are only preferred embodiments of this utility model and are not intended to limit the scope of application of this utility model. Therefore, any equivalent changes made to the principle of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure for detecting elevator car height based on laser ranging, characterized in that: It includes a laser rangefinder sensor fixedly installed on the top of the elevator car and a reflective component fixedly installed on the top of the elevator shaft; a dust removal device is provided on one side of the laser rangefinder sensor, which is used to remove dust from the upper surface of the laser rangefinder sensor.

2. The elevator car height detection structure based on laser ranging according to claim 1, characterized in that: The dust removal device includes a linear drive mechanism and a cleaning head, with the linear drive mechanism being drivenly connected to the cleaning head.

3. The elevator car height detection structure based on laser ranging according to claim 2, characterized in that: The linear drive mechanism uses an electric push rod.

4. The elevator car height detection structure based on laser ranging according to claim 2, characterized in that: The laser rangefinder and dust removal device are equipped with a protective housing, and the upper end of the protective housing is provided with a detection opening.

5. An elevator car height detection structure based on laser ranging according to any one of claims 1-4, characterized in that: The number of laser rangefinders is two, three, or four, and they are arranged in an equidistant circular array relative to the center of the top of the elevator car.

6. The elevator car height detection structure based on laser ranging according to any one of claims 1-4, characterized in that: A buffer pad is installed between the laser rangefinder and the top of the elevator car.

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