Safety device for detecting personnel in hoistway and pit

Abstract

The utility model belongs to the technical field of elevator safety, and particularly discloses a safety device for detecting personnel in a shaft and a pit, which comprises a detection unit, a signal processing unit, a signal processing unit and a signal processing unit, and the detection unit is mounted on the outer wall of the bottom of a lift car, has various detection modes and detects whether the lift car in the shaft and the pit is suitable for people in real time; the control unit is connected with the elevator control system and controls the operation of the elevator according to a detection signal of the detection unit; through the cooperation of the detection unit, the control unit and the alarm unit, whether people exist below the elevator car in an elevator pit and a hoistway or not can be automatically and reliably detected in real time, seamless butt joint with an elevator control system is achieved, the safety of the elevator is improved, and the safety of the elevator is improved. And when people are detected, the elevator is automatically forbidden to run at a high speed, manual operation errors are avoided, and elevator running safety and constructor safety are effectively guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, specifically a safety device for detecting people in the shaft and pit. Background Technology

[0002] The elevator pit and shaft are critical spaces for elevator operation and are also the primary areas for elevator installation, maintenance, and repair; personnel are typically prohibited from entering these areas. During routine maintenance, the stop switch located in the shaft or pit must be activated before entering to prevent the elevator from running. However, sometimes due to operator error, maintenance personnel may forget to activate the stop switch upon entering the shaft or prematurely deactivate it before safely exiting the shaft or pit, leading to accidents. To ensure elevator safety and the safety of construction workers, it is essential to ensure that the elevator cannot operate at high speeds and must only run at slow speeds when personnel are working in the pit or shaft below the car.

[0003] Because current elevator safety systems are not convenient for detecting the presence of personnel in the shaft in real time and accurately, nor can they promptly stop the elevator from operating to avoid accidents, the current methods for protecting the safety of maintenance personnel entering the shaft or pit are usually mechanical safety switches or manual confirmation. However, mechanical safety switches require manual operation, which is prone to omissions or misoperations, posing safety hazards; while manual confirmation mainly relies on the responsibility of personnel, which carries the risk of human error and is inefficient. Therefore, we need to propose a safety device to detect personnel in the shaft and pit to solve the above-mentioned problems, enabling it to automatically and reliably detect whether there are personnel in the elevator pit and below the car in the shaft, and to stop the elevator from running at high speed when personnel are detected. Utility Model Content

[0004] The purpose of this utility model is to provide a safety device for detecting personnel in the elevator shaft and pit, which can automatically and reliably detect whether there are personnel in the elevator pit and below the car in the shaft, and prohibit the elevator from running at high speed when personnel are detected, so as to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety device for detecting personnel in the elevator shaft and pit, comprising: a detection unit installed on the outer wall of the bottom of the car and having multiple detection methods, wherein the detection unit detects in real time whether there are personnel in the elevator pit and the car in the shaft;

[0006] A control unit connected to the elevator control system, wherein the control unit is electrically connected to the detection unit, and the control unit controls the operation of the elevator according to the detection signal from the detection unit;

[0007] An alarm unit is used to provide an alarm reminder when there are people under the car, and the alarm unit is electrically connected to the control unit.

[0008] Preferably, the detection unit includes one or more of a camera, an infrared sensor, a lidar, and an ultrasonic sensor.

[0009] Preferably, the camera is bolted to the center of the bottom of the car, and one end of the camera is electrically connected to an image recognition module.

[0010] Preferably, it also includes a bracket for mounting the detection unit, the bracket being U-shaped, the upper end of the bracket being welded to the outer bottom of the car, and the lower end of the bracket having a mounting hole.

[0011] Preferably, the control unit includes a microprocessor for controlling the operation of the elevator, and the control terminal of the microprocessor is connected to the elevator control system via a relay.

[0012] Preferably, the alarm unit includes an audible and visual alarm installed in the shaft, and the audible and visual alarm is electrically connected to the microcontroller.

[0013] Preferably, the alarm unit further includes a display screen installed outside the elevator lobby for displaying alarm information, and the display screen is also equipped with an audible and visual alarm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model, through the cooperation of a detection unit, a control unit, and an alarm unit, can automatically, reliably, and in real time detect whether there are people in the elevator pit and under the car in the shaft. It is seamlessly connected with the elevator control system and automatically prohibits the elevator from running at high speed when people are detected, avoiding human error and effectively ensuring the safety of elevator operation and construction personnel.

[0016] 2. This utility model reduces false alarms and missed alarms by using multiple detection methods in the detection unit, thereby improving detection accuracy and reliability. Combined with the alarm unit's alarm reminders, it further enhances safety protection capabilities. Attached Figure Description

[0017] Figure 1 This is a structural block diagram of the present utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model during elevator installation;

[0019] Figure 3 This is a flowchart of the workflow of this utility model.

[0020] In the diagram: 1. Detection unit; 2. Control unit; 3. Alarm unit; 31. Audible and visual alarm; 32. Display screen. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a safety device for detecting personnel in the elevator shaft and pit, including a detection unit 1 installed on the outer wall of the bottom of the car and having multiple detection methods, a control unit 2 connected to the elevator control system, and an alarm unit 3 for providing an alarm reminder when there are personnel under the car. The detection unit 1 detects in real time whether there are personnel in the elevator pit and the car in the shaft. The control unit 2 is electrically connected to the detection unit 1. The control unit 2 controls the operation of the elevator according to the detection signal of the detection unit 1. The alarm unit 3 is electrically connected to the control unit 2.

[0023] The detection unit 1 uses multiple detection methods to detect in real time whether there are people in the elevator pit and under the car in the hoistway. When there are no people in the elevator pit and under the car in the hoistway, the detection unit 1 transmits the detection signal to the control unit 2. The control unit 2 controls the elevator to operate normally. When there are people in the elevator pit and under the car in the hoistway, the detection unit 1 transmits the detection signal to the control unit 2. The control unit 2 controls the elevator to stop high-speed operation and triggers the alarm unit 3 to issue an alarm signal. Through the coordinated work of the detection unit 1, control unit 2 and alarm unit 3, the presence of people in the elevator pit and under the car in the hoistway can be detected automatically, reliably and in real time. It is also seamlessly connected with the elevator control system. When people are detected, the elevator is automatically prohibited from high-speed operation to avoid human error and effectively ensure the safety of elevator operation and construction personnel.

[0024] The detection unit 1 includes one or more of a camera, infrared sensor, lidar, and ultrasonic sensor, enabling the detection unit 1 to have multiple detection methods, reducing false alarms and missed alarms, improving detection accuracy and reliability, and further enhancing security protection capabilities when combined with the alarm reminder of the alarm unit 3.

[0025] Infrared sensors detect infrared radiation in the elevator pit and shaft, and determine the presence of personnel based on changes in infrared radiation; lidar emits laser beams and receives reflected signals, and determines the presence of personnel based on the reflected signals; ultrasonic filters emit ultrasonic waves and receive reflected signals, and determine the presence of personnel based on the reflected signals. Infrared sensors, lidar, and ultrasonic sensors are all common knowledge devices in this field, and their structures will not be described in detail here.

[0026] The camera is bolted to the center of the bottom of the car. One end of the camera is electrically connected to an image recognition module. The camera uses image information from the elevator pit and shaft, and the image recognition module identifies the collected image information to determine whether there are people. Both the camera and the image recognition module are common knowledge devices in the field and will not be described in detail here.

[0027] It also includes a bracket for mounting the detection unit 1. The bracket is U-shaped, with its upper end welded to the outer bottom of the car and its lower end having mounting holes. The bracket provides better support for the detection unit 1, and the mounting holes also facilitate the installation of the detection devices with bolts. The size of the bracket can also be matched according to the number of detection devices, so that different detection devices can be installed on the bracket.

[0028] The control unit 2 includes a microprocessor for controlling the operation of the elevator. The control terminal of the microprocessor is connected to the elevator control system through a relay. The microprocessor receives the detection signal from the detection unit 1 and controls the operation of the elevator according to the detection signal. The relay connects or disconnects the control circuit in the elevator control system according to the control signal of the microprocessor, so that the elevator runs or stops.

[0029] The alarm unit 3 includes an audible and visual alarm 31 installed in the shaft. The audible and visual alarm 31 is electrically connected to the microcontroller and provides visual and auditory warnings, making it convenient for inspection personnel to detect problems in a timely manner.

[0030] The alarm unit 3 also includes a display screen 32 installed outside the elevator hall for displaying alarm information. The display screen 32 is also equipped with an audible and visual alarm 31. The display screen 32 displays the alarm information of the alarm unit 3, which is convenient for personnel to observe and confirm the abnormality. At the same time, the audible and visual alarm signal of the audible and visual alarm 31 provides a dual alarm mechanism, so that people in different locations can promptly detect the abnormality of the elevator.

[0031] During operation, the detection unit 1 monitors the activity inside the elevator shaft in real time. When it detects that someone has entered the area below the car, the control unit 2 transmits a signal to the elevator control system (the elevator control system is a standard component of the elevator when it leaves the factory. It is designed, installed and debugged by the manufacturer as a whole and is a core system that comes with the elevator, so it will not be described in detail here). The elevator control system sends a command to prohibit high-speed operation and triggers the alarm unit 3 at the same time. The elevator stops high-speed operation until the people in the shaft leave and the system reconfirms the safety status.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety device for detecting a person in a shaft and a pit, characterized by: The application relates to an elevator safety device. The application comprises: a detection unit (1) installed on the outer wall of the bottom of a car and provided with multiple detection modes, which detects in real time whether people exist in the pit of the elevator and the car in the hoistway; A control unit (2) connected with the elevator control system, which is electrically connected with the detection unit (1) and controls the operation of the elevator according to the detection signal of the detection unit (1); An alarm unit (3) for providing an alarm reminder when people exist below the car, which is electrically connected with the control unit (2).

2. The safety device for detecting a person in a shaft and a pit according to claim 1, wherein: The detection unit (1) comprises one or more of a camera, an infrared sensor, a laser radar and an ultrasonic sensor.

3. The safety device for detecting a person in a shaft and a pit according to claim 2, characterized in that: The camera is installed at the center of the outer bottom of the car through bolts, and one end of the camera is electrically connected with an image recognition module.

4. The safety device for detecting a person in a shaft and a pit according to claim 3, characterized in that: A bracket for installing the detection unit (1) is further included, the bracket is in a shape of a Chinese character 'fang', the upper end of the bracket is welded with the outer bottom of the car, and the lower end of the bracket is provided with a mounting hole.

5. The safety device for detecting a person in a shaft and a pit according to claim 1, wherein: The control unit (2) comprises a microprocessor for controlling the operation of the elevator, and the control end of the microprocessor is connected with the elevator control system through a relay.

6. A safety device for detecting a person in a shaft and pit according to claim 5, characterized in that: The alarm unit (3) comprises an audible and visual alarm (31) installed in the hoistway, and the audible and visual alarm (31) is electrically connected with a microcontroller.

7. A safety device for detecting a person in a shaft and pit according to claim 6, characterized in that: The alarm unit (3) further comprises a display screen (32) installed outside the elevator hall for displaying alarm information, and the display screen (32) is also provided with the audible and visual alarm (31).

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