Safety device for elevator

Abstract

The invention relates to a safety device for an elevator having an elevator car with a car door, comprising: an acceleration measuring device for detecting vibrations of the car door; a pre-evaluation unit for determining a shake of the car door on the basis of a comparison of the detected vibrations with at least one threshold value; a transmission device for transmitting a vibration signal based on the detected vibration to a server; the pre-evaluation unit is spatially connected to the elevator car, the transmission device transmits the vibration signal if the pre-evaluation unit determines a shake, and the server analyzes the vibration signal. And the server is spatially separated from the elevator and weighs the transmitted vibration signal and stores and / or outputs information of a possible cause of the shake according to the weighting.

Description

Technical Field

[0001] The present invention relates to a safety device for an elevator in order to identify vandalism to the elevator door. Background Art

[0002] Safety devices of the type described are known from the prior art, which monitor an elevator car by means of a camera. This can lead to legal problems. 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 by a safety device according to the following solution. Advantageous configurations are shown in the following solutions.

[0005] The safety device according to the present invention is a safety device for an elevator having an elevator car with a car door, comprising: an acceleration measuring device for detecting vibrations of the car door; a pre-evaluation unit for determining a swaying of the car door based on a comparison of the detected vibrations with at least one threshold value; a transmission device for transmitting a vibration signal based on the detected vibrations to a server; and a server for analyzing the vibration signal, wherein the pre-evaluation unit is spatially connected to the elevator car, if the pre-evaluation unit determines a swaying, the transmission device transmits the vibration signal, and the server is spatially separated from the elevator and weights the transmitted vibration signal and stores and / or outputs information on the possible causes of the swaying according to the weighting.

[0006] Advantages achievable by the safety device are that the amount of data to be transmitted to the server can be kept small. Advantages achievable by the safety device are that legal problems related to data protection can be avoided. Advantages achievable by the safety device are that the part of the safety device on the car can cope with a smaller computing power, whereby the safety device can be made less expensive.

[0007] The elevator can be a passenger elevator.

[0008] The acceleration sensor can be arranged on the car door.

[0009] Swaying is a special characteristic of the vibrations detected by the acceleration measuring device and may correspond, for example, to a knock or collision on the elevator door.

[0010] Preferably, the vibrations of the acceleration measuring device are detected during the opening and / or closing process and / or in the open or closed state of the car door.

[0011] Preferably, the pre-evaluation unit determines the swaying by the amplitude of the vibrations exceeding a threshold value.

[0012] Preferably, the pre - evaluation unit determines the shaking in such a way that the amplitude of the vibration periodically exceeds a threshold value.

[0013] Preferably, the pre - evaluation unit determines the shaking in such a way that it detects a determined frequency, in particular the natural frequency of the door.

[0014] Preferably, the pre - evaluation unit determines the shaking in such a way that it performs a frequency analysis and / or a wavelet analysis.

[0015] Preferably, the pre - evaluation unit determines the shaking in such a way that it performs a frequency analysis by pattern recognition.

[0016] Preferably, the server weights the vibration signal in such a way that the amplitude of the vibration exceeds a threshold value.

[0017] Preferably, the server weights the vibration signal in such a way that the amplitude of the vibration periodically exceeds a threshold value.

[0018] Preferably, the server weights the vibration signal in such a way that it detects a determined frequency, in particular the natural frequency of the door.

[0019] Preferably, the server weights the vibration signal in such a way that it performs a frequency analysis and / or a wavelet analysis.

[0020] Preferably, the server weights the vibration signal in such a way that it performs a frequency analysis by pattern recognition.

[0021] Other features of the present invention are given in the drawings.

[0022] For combinations of features not mentioned, the correspondingly mentioned advantages can also be achieved. Description of the Drawings

[0023] Embodiments of the present invention are shown in the drawings and are specifically described below. The same reference numerals in the respective drawings denote corresponding elements to each other. The drawings show:

[0024] Figure 1 A flow chart for a 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 acceleration sensor 11.

[0026] The acceleration sensor 11 measures the vibration of the car door in the closed state. The acceleration measuring device transmits the measured value of the vibration to the pre - evaluation unit 12.

[0027] The pre - evaluation unit 12 analyzes the received measured values in such a way that the pre - evaluation unit compares the amplitude of the measured values with at least one threshold. If at least one threshold is not exceeded, the process starts again with the acceleration sensor 11. If at least one threshold is exceeded, the process continues to the transmission device 13.

[0028] The transmission device 13 wirelessly transmits the measured values of the vibration sensor to the server 14 via the Internet protocol.

[0029] The server 14 analyzes and weights the received measured values, assigns information on whether there is sabotage to the measured values according to the weighting, and stores the information for output to the service center.

[0030] List of reference numerals

[0031] 10 Flow chart of the security device

[0032] 11 Acceleration measuring device

[0033] 12 Pre - evaluation device

[0034] 13 Transmission device

[0035] 14 Server

[0036] 15 Output device.

Claims

1. A safety device, - for an elevator having an elevator car with a car door, the safety device having: - an acceleration measuring device for detecting vibrations of the car door; a pre-evaluation unit for determining a shaking of the car door based on a comparison of the detected vibrations with at least one threshold value, - a transmitting device for transmitting a vibration signal based on the detected vibration to a server, and - a server for analyzing the vibration signal It is characterized in that - the pre-evaluation unit is spatially connected to the elevator car, - if the pre-evaluation unit determines a shaking, the transmission device transmits the vibration signal, and - the server - is spatially separated from the elevator, and - weighting the transmitted vibration signal, and - storing and / or outputting information on possible causes of said shaking according to said weighting.

2. A safety device according to any one of the preceding claims, characterised in that The acceleration measuring device detects the vibrations during an opening and / or closing process and / or in the open or closed state of the car door.

3. A safety device according to any one of the preceding claims, characterised in that The pre-evaluation unit determines the shaking by: - The amplitude of the vibration exceeds a threshold value.

4. A safety device according to any one of the preceding claims, characterised in that - the pre-evaluation unit determines the shaking by: - The amplitude of the vibration periodically exceeds a threshold value.

5. A safety device according to any one of the preceding claims, characterised in that - the pre-evaluation unit determines the shaking by: - Detecting certain frequencies, in particular the natural frequencies of the door.

6. A safety device according to any one of the preceding claims, characterised in that - the pre-evaluation unit determines the shaking by: -Perform frequency analysis and / or wavelet analysis.

7. A safety device according to any one of the preceding claims, characterised in that - the pre-evaluation unit determines the shaking by: -Perform frequency analysis through pattern recognition.

8. A safety device according to any one of the preceding claims, characterised in that - The server weights the vibration signal in the following manner, namely - The amplitude of the vibration exceeds a threshold value.

9. A safety device according to any one of the preceding claims, characterised in that - The server weights the vibration signal in the following manner, namely - The amplitude of the vibration periodically exceeds a threshold value.

10. A safety device according to any one of the preceding claims, characterised in that - The server weights the vibration signal in the following manner, namely - Detecting certain frequencies, in particular the natural frequencies of the door.

11. A safety device according to any one of the preceding claims, characterised in that - The server weights the vibration signal in the following manner, namely -Perform frequency analysis and / or wavelet analysis.

12. A safety device according to any one of the preceding claims, characterised in that - The server weights the vibration signal in the following manner, namely -Perform frequency analysis through pattern recognition.

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