Safety device for passenger elevator
By integrating the existence determination device, the stop state determination device and the door state determination device in the elevator, comprehensively judging the situation in the elevator car, the problem of existing elevator safety equipment being difficult to effectively detect and alarm is solved, and the effect of improving passenger safety and automatic alarm is achieved.
Patent Information
- Application Number
- CN202411809652.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-11
- Filing Date
- 2024-12-10
- Publication Date
- 2025-06-13
AI Technical Summary
Existing elevator safety equipment is difficult to effectively detect and call the police if the personnel are accidentally trapped in the elevator car.
A safety device is designed, including a determination device, a stop state determination device and a door state determination device. Through the signals of these devices, it is comprehensively determined whether there is a person in the elevator car and whether the elevator is in a stop state and whether the door is closed. If certain conditions are met, an alarm signal will be transmitted.
Improves passenger safety, provides automatic alarm function to prevent abuse and saves costs.
Smart Images
Figure CN120135893A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a safety device for a passenger elevator for a situation where a person is inadvertently trapped in an elevator car. Background Art
[0002] Safety devices of the type described are known from the prior art, which provide an alarm button in the elevator car for the situation where a person is inadvertently trapped in the elevator car. Summary of the Invention
[0003] The object of the present invention is to provide an improved safety device of the type described.
[0004] This object is solved starting from a safety device of the type described at the beginning by a safety device according to the following scheme. Advantageous configurations are given in the following scheme.
[0005] The safety device according to the present invention is a safety device for a passenger elevator having an elevator car with a car door, which has a presence determination device for determining the presence of at least one person in the elevator car; a stop state determination device for determining the stop state of the elevator car; a door state determination device for determining the closed state of the car door of the elevator car and the duration of the closed state, and a transmission device for transmitting a signal to a supervision center. The transmission device is designed here such that if the door state determination device determines a closed state for the car door, and if the presence determination device determines the presence of at least one person in the elevator car, and if the stop state determination device determines the stop state of the elevator car, and if a determined duration has elapsed, during which duration the stop state determination device has continuously determined the stop state of the elevator car and the door state determination device has continuously determined the closed state of the car door, then a signal is transmitted.
[0006] The advantages that the safety device can achieve are to improve the safety of passengers and / or provide an automatic alarm, and / or prevent abuse, whereby costs can be saved.
[0007] The presence determination device, the stop state determination device and / or the door state determination device can be designed to send a signal having its determined result to the transmission device.
[0008] The determination can be a measurement, or a detection, or a signal state, or the reception of a corresponding signal.
[0009] The presence determination device can be a 2D or 3D camera in the elevator car, which monitors the space of the elevator car, and the 2D or 3D camera has an image recognition device that recognizes people and the number of people. The presence determination device can be a 2D or 3D camera that monitors the entrance of the elevator car and recognizes people and their movement directions into or out of the elevator car, and the 2D or 3D camera calculates the number of people in the elevator from the movement directions. The presence determination device can be the following system that detects the horizontal movement of the car when people enter or leave the elevator car through an acceleration measuring device, and the system calculates the number of people in the elevator car from the number of entries and exits. The presence determination device can be a system composed of two light barriers that are successively positioned in the passage of the entrance of the elevator car in the passing direction, and the system detects the movement direction of people entering or leaving the elevator car through detecting the time offset of detection, and the presence determination device determines the number of people in the elevator car by calculating the number of entries or exits.
[0010] The stop state determination device can be an absolute position determination system that detects the position of the elevator car and thereby determines the speed or stop state. The stop state determination device can be a normal control device for the elevator movement that can indicate the stop state. The stop state determination device can be a stop brake that forces the elevator car to be in a stopped state through its state. The stop state determination device can be an acceleration sensor on the elevator car that detects the movement state of the elevator car.
[0011] The door state determination device can include a contact switch on the elevator car for detecting the closed state. The door state determination device can be a normal control device for the elevator movement that can indicate the door state.
[0012] The transmission device can be a wired or wireless transmission device.
[0013] The supervision center can be used by the service company that monitors the elevator uninterruptedly.
[0014] Preferably, the safety device includes a knock detection device for determining a knock on the car door. Preferably, the transmission device is designed to transmit a signal if a knock is recorded by a device for detecting mechanical vibration or acoustic vibration within a determined duration.
[0015] The advantage that can be achieved is to further improve the reliability of the safety device by correlating the automatic elements and manual elements that check each other.
[0016] Preferably, the tapping detection device includes a vibration sensor for detecting vibrations or a microphone for detecting the noise of the car door. Preferably, the tapping detection device includes an evaluation device that determines a tap based on the intensity of the vibration or the volume of the noise and / or the repetition rate of the determined intensity or volume.
[0017] Preferably, the safety device includes a timer for determining a duration.
[0018] Preferably, the transmission device includes a connection device to a server that is spatially separate from the elevator, in particular a wireless connection device, in particular an Internet connection device.
[0019] The advantage that can be achieved is that the signals of the safety device can be processed in spatially separate servers in the Internet of Things and disseminated globally via a browser.
[0020] Other features of the invention are given in the drawings.
[0021] For combinations of features not mentioned, the correspondingly mentioned advantages can also be achieved. Description of the Drawings
[0022] Embodiments of the invention are shown in the drawings and are specifically set forth below. The same reference numerals in the various drawings denote corresponding elements to one another. The drawings show:
[0023] Figure 1 a flow chart of the entire device,
[0024] Figure 2 an extended flow chart of the safety device. Detailed Description of the Invention
[0025] Figure 1 A flow chart showing the safety device 10 is presented. The process starts with the presence determination device 11.
[0026] The presence determination device determines whether at least one person is in the elevator car. If no person is in the elevator car, the process starts again with the presence determination device 11. However, if the presence determination device detects at least one person in the elevator car, the process continues to the stop state determination device 13.
[0027] The stop state determination device 13 determines whether the elevator car is in a stopped state. If the stop state determination device detects that the elevator car is performing a moving movement, the process returns to the stop state determination device until the elevator stops. However, if the stop state determination device now detects that the elevator car has stopped, the process continues to the door state determination device 14.
[0028] The door status determination device 14 determines whether the elevator door of the elevator car is closed. If the door status determination device detects that the elevator door is not closed, the process starts again with the presence determination device 11. However, if the door status determination device detects that the elevator door is closed, the process continues to the transmission device 15.
[0029] The transmission device 15 determines, with the aid of a timer, whether a defined duration has elapsed since the time point at which the stop of the elevator car was detected and at the same time the closed state of the car door was detected. For this purpose, the transmission device stores the time point from which the stop state determination device and the door status determination device detected simultaneously. As long as this duration has not elapsed, the process starts again with the presence determination device 11. Once the duration has elapsed during which the elevator has remained stopped and the door has been closed, the transmission device signals 16 are sent wirelessly via the Internet to the server.
[0030] Figure 2 Shows Figure 1 The flow chart of the safety device 10 shown in, however, the safety device is extended with a knock detection device.
[0031] The function of the presence determination device 11 is as Figure 1 described.
[0032] However, different from Figure 1 if the presence determination device detects that at least one person is in the elevator car, the process of the presence determination device 11 continues here to the knock detection device 12.
[0033] The knock detection device 12 determines with the aid of a vibration sensor whether the car door has been knocked. If the knock detection device does not detect that the car door has been knocked, the process starts again with the presence determination device 11. However, if the knock detection device detects that the car door has been knocked, the process continues to the stop state determination device 13.
[0034] Other processes are as Figure 1 described.
[0035] List of reference numerals
[0036] 10 Flow chart of the safety device
[0037] 11 Presence determination device
[0038] 12 Knock detection device
[0039] 13 Stop state determination device
[0040] 14 Door status determination device
[0041] 15 Transmission device
[0042] 16 Alarm signal.
Claims
1. A safety device, - for a passenger elevator having an elevator car with a car door, the safety device comprising: - presence determining means for determining the presence of at least one person in said elevator car; - a stop state determining device for determining the stop state of the elevator car; - a door state determining device for determining a closed state of a car door of said elevator car and a duration of said closed state; and - a transmission device for transmitting the signal to a monitoring center, It is characterized in that - The transmission device is designed as follows: -if - the door state determination device determines the closed state for the car door, and - the presence determination means determines that at least one person is in the elevator car, and - the stop state determining means determines the stop state of the elevator car, and - a determined duration has expired, during which - the stop state determining device has continuously determined the stop state of the elevator car, and - the door state determination device has continuously determined the closed state of the car door, -Then transmit the signal.
2. The safety device according to claim 1, characterized in that The safety equipment - including knock detection device, - used to identify knocks on the car door, and - The transmission device is designed as follows: - if a knock is registered by the device for detecting mechanical or acoustic vibrations within a determined duration, -Then transmit the signal.
3. The safety device according to claim 1, characterized in that Safety equipment - The knock detection device comprises: - a vibration sensor for detecting vibrations of the car door or a microphone for detecting noises of the car door; and An evaluation device which determines a knock as a function of the intensity of the vibration or the volume of the noise and / or a repetition rate of a determined intensity or volume.
4. The safety device according to claim 1, characterized in that - the safety device comprises a timer, - for determining said duration.
5. The safety device according to claim 1, characterized in that - the transmission device comprises connection means to a server, the server being spatially separated from the elevator, - Especially wireless connection devices, - Especially internet connected devices.