Safety device for a passenger lift

Abstract

A safety device for a passenger elevator with an elevator car, comprising a presence detection device for determining the presence of exactly one person in the elevator car, a position detection device for determining whether the person is in a lying or squatting position and the time elapsed since the person reached the lying or squatting position, and a transmission device for transmitting a signal to a supervisory authority. The transmission device transmits the signal when the presence detection device detects exactly one person in the elevator car, the position detection device detects the person in a lying or squatting position, and a specific time elapsed since the person reached the lying or squatting position.

Description

[0001] The invention relates to a safety device for a passenger elevator in the event that a person in the passenger elevator suffers a medical emergency.

[0002] Safety devices of the type mentioned are known from the prior art, which provide an alarm button in the elevator car in the event of a medical emergency for a person in the elevator car.

[0003] It is an object of the invention to provide an improved safety device of the type mentioned.

[0004] This object is achieved, starting from a safety device of the type mentioned above, by a safety device according to claim 1. Advantageous embodiments are specified in the further dependent claims.

[0005] The safety device according to the invention is a safety device for a passenger elevator having an elevator car with a presence determination device for determining the presence of exactly one person in the elevator car, with a position determination device for determining a lying or squatting position of the person and the time since the person entered the lying or squatting position, and with a transmission device for transmitting a signal to a supervisory authority. The transmission device transmits the signal when the presence determination device determines exactly one person in the elevator car, the position determination device determines the person's lying or squatting position, and a specific time period has elapsed since the person entered the lying or squatting position.

[0006] The security device may have the advantage of increasing passenger safety and / or providing automated alarms and / or preventing misuse, thereby saving costs.

[0007] The presence detection device can be a 2D or 3D camera in the elevator car that monitors the space within the elevator car and has image recognition to identify people and the number of people inside. The presence detection device can be a 2D or 3D camera that monitors the entrance to the elevator car and identifies people and their direction of movement into or out of the elevator car. The presence detection device can be a system that uses an accelerometer to detect the horizontal movement of the car when a person enters or exits the elevator car and calculates the number of people in the elevator car from the number of entries and exits.The presence detection device may be a system of two light barriers positioned one behind the other in the passage of the elevator car entrance, which detects the direction of movement of a person entering or exiting the elevator car by means of the time offset of the detection, and which determines the number of people in the elevator car from the count of the entry or exit.

[0008] The position determination device can be a 2D or 3D camera that monitors the space of the elevator car and has image recognition that identifies the height or lying position of a person. The position determination device can be a light grid or a radar sensor in the elevator car that monitors a plane parallel to the floor at a specific height and, if no detection occurs or if there is a change from detection to non-detection, determines a lying or squatting position of a person in the elevator car.

[0009] The transmission device may be a wired or wireless transmission device.

[0010] Preferably, the safety device comprises a timer which determines the period of time from the time since the position determining device has determined a lying or squatting position of the person.

[0011] Preferably, the position determination device determines the lying or squatting position of the person by determining that a first threshold value for the height of the person is undershot.

[0012] This can increase the reliability of the safety device.

[0013] Preferably, the position determining device determines the lying or squatting position of the person by determining a change in the height of the person since entering the cabin by a certain second threshold value.

[0014] This can increase the reliability of the safety device.

[0015] Preferably, the security device comprises an interrogation device for questioning the person about his or her condition and for transmitting or not transmitting the signal depending on the answer or lack of answer.

[0016] The interrogation device may be an intercom that is initially activated instead of the signal. The interrogation device may be an automatic interrogation that requests confirmation of the emergency. The interrogation device may be a camera that is initially activated instead of the signal. The interrogation device may comprise an intercom and a camera.

[0017] This can increase the reliability of the safety device.

[0018] Preferably, the safety device comprises a tracking device which tracks the position of a person in the elevator car and transmits the position to the position determining device.

[0019] This can increase the reliability of the safety device.

[0020] The advantages mentioned can also be realized for combinations of features in which they are not mentioned. Overview of the drawings:

[0021] Embodiments of the invention are illustrated in the drawings and explained in more detail below. Like reference numerals in the individual figures denote corresponding elements. They show: Fig. 1A flowchart of the safety device Detailed description of the drawings:

[0022] Fig. 1 shows a flowchart of the safety device 10. The process starts at the presence detection device 11.

[0023] The presence detection device determines whether there is exactly one person in the elevator car. If there are no or several people in the elevator car, the process starts again with the presence detection device 11. However, if the presence detection device detects exactly one person in the elevator car, the process continues to the position detection device 12.

[0024] The position determination device 12 determines in a first step 12a whether the person's height has decreased since entering the elevator car and, if applicable, in a second step 12b whether the person's height has fallen below a minimum value. If the position determination device does not detect that the person's height has decreased since entering the elevator car or that the person's height has fallen below a minimum value, the process returns to the presence determination device 11. However, if the position determination device detects that the person's height has decreased since entering the elevator car and the person's height has fallen below a minimum value, the process continues to the query device 13.

[0025] The interrogation device 13 questions the person about their condition via a loudspeaker and records the person's response via a microphone. If the person denies an emergency, the process begins again with the presence determination device 11. If the person confirms the emergency or if no response is received, the process continues to the transmission device 14.

[0026] The transmission device 14 transmits an alarm signal wirelessly via the Internet to a server. This server then informs a service company, which initiates rescue measures. List of reference symbols:

[0027] 10Flowchart of the safety device 11Presence determination device 12Position determination device 12aFirst step of the position determination device 12bSecond step of the position determination device 13Interrogation device 14Transmission device

Claims

1. Safety device - for a passenger lift with a lift car - with a presence detection device for determining the presence of only one person in the lift car, - with a position detection device for determining a lying or squatting position of the person and the time elapsed since the lying or squatting position was reached, and - with a transmission device for transmitting a signal to a supervisory authority, characterized in that - the transmission device transmits the signal when - the presence determination device determines only one person in the lift car and - the position determination device determines the lying or squatting position of the person and - a certain period of time has elapsed - since the lying or squatting position was reached.

2. Safety device according to claim 1 characterized in that- the safety device comprises a timer which determines the period of time from the moment when the position determining device has determined that the person is in a lying or squatting position.

3. Safety device according to any preceding claim characterized in that - the position determination device determines the lying or squatting position of the person by - a first threshold value for the height of the person being undercut.

4. Safety device according to any preceding claim characterized in that - the position determination device determines the lying or squatting position of the person by - determining a change in the height of the person since entering the cabin by a certain second threshold value.

5. Safety device according to any preceding claim characterized in that- the safety device - comprises an interrogation device - to question the person about his condition - and to transmit or not transmit the signal depending on the answer or lack of answer.

6. Safety device according to any preceding claim characterized in that - the safety device - has a tracking device - which tracks the position of a person in the elevator car and transmits the position to the position determination device.

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