Detection device for determining a floor

Abstract

A detection device for determining a floor: for an elevator having a car with a car door for performing an opening and closing movement when the car is stopped at a floor; an accelerometer for detecting vibrations of the car door in an opening and / or closing movement; the invention relates to a method for operating a floor, comprising an evaluation device which is designed to generate vibration curves from the detection of vibrations during the opening and / or closing movement and to generate reference vibration curves from the vibration curves for each floor during a learning phase and to store the reference vibration curves, and to compare the currently recorded vibration curves with the existing reference vibration curves outside the learning phase, from the comparison, a reference vibration curve that optimally matches the currently recorded vibration curve is determined, from which a suitable floor is determined. The detection device has a grating for detecting objects in the region of the opened car door, the grating having a transmitter strip and a receiver strip, which are provided for mounting on the car door. The accelerometer is arranged on a transmitter strip or a receiver strip for fastening to the car door.

Description

Technical Field

[0001] The invention relates to a detection device for an elevator, which is used to determine a floor when an elevator car stops at a floor. Background Art

[0002] Detection devices are known from the prior art which record the vibration curve of an elevator door and compare it with an existing vibration curve assigned to a floor. Summary of the invention

[0003] The object of the present invention is to provide an improved detection device of the aforementioned type.

[0004] Starting from a detection device of the type mentioned at the outset, this object is achieved by means of the detection device and the elevator described below. Advantageous embodiments are described in the embodiments described below.

[0005] The detection device according to the invention is a detection device for an elevator having a car with at least one car door, the car door being designed to perform an opening movement and a closing movement when the car stops at a floor, the detection device being used to determine the floor when the elevator car stops at a floor. The detection device has at least one accelerometer for detecting vibrations of the car door during the opening movement and / or the closing movement. The detection device has an evaluation device, which is designed to generate a vibration curve from the detection of the vibrations during the opening movement and / or the closing movement, and in a learning phase, to generate a reference vibration curve for each of at least two floors from one or more vibration curves and store them, and outside of the learning phase, to compare the currently recorded vibration curve with these existing reference vibration curves, and to determine the reference vibration curve that best matches the currently recorded vibration curve from the comparison, and thereby determine the suitable floor.

[0006] The detection device also has a light barrier for detecting objects in the area of ​​the opened car door, the light barrier having a transmitter strip and a receiver strip, wherein at least one of the strips is designed to be mounted on the car door. In addition, at least one accelerometer is arranged on the transmitter strip or the receiver strip that is designed to be fastened to the car door.

[0007] The vibration curve is a characteristic resulting from a measurement of the vibration during the opening and / or closing movement. The characteristic can be the time profile of the acceleration, or a profile derived therefrom or a state derived therefrom.

[0008] The best match may mean that the deviation of a characteristic or part of a vibration curve from a characteristic or part of a reference vibration curve is less than the deviation of other vibration curves from the characteristics or parts of the reference vibration curve. The best match may also mean that the deviation of a characteristic or part of a vibration curve from the corresponding characteristic or corresponding part of the reference vibration curve is less than a threshold value.

[0009] This can achieve the advantage that the detection device can be mounted together with the light barrier in an advantageous manner. This can achieve the advantage that the accelerometer is permanently arranged together with the light barrier at a well-defined position. This can simplify and make the detection and determination of the floor more precise.

[0010] Preferably, at least one accelerometer has a common carrier or a common housing with the transmitter bar and / or the receiver bar.

[0011] This can achieve the advantage that the detection device can be mounted together with the light barrier in an advantageous manner. This can achieve the advantage that the accelerometer is permanently arranged together with the light barrier at a well-defined position. This can simplify and make the detection and determination of the floor more precise.

[0012] Preferably, the detection device has a status signal device for outputting a signal of the start and / or end of the vibration detection, wherein the signal is in particular not obtained from the vibration detection, and wherein the evaluation device is designed to deduce the start and end of the detection from the signal.

[0013] This can have the advantage that the vibration signature can be detected more precisely. This can have the advantage that the accuracy is increased and the effort required for the analysis is reduced.

[0014] Preferably, the status signal device consists of a light barrier and an evaluation device, wherein the light barrier is designed to detect the distance between the transmitter strip and the receiver strip, in particular by detecting the received intensity, and wherein the evaluation device is designed to determine the temporal start and / or end of the detection of vibrations in the opening movement and / or the closing movement from the detection of the distance and in particular to associate it with a determined distance value.

[0015] This can achieve the advantage that the detection device can determine the start and / or end without external input. This can achieve the advantage that the detection device works more reliably.

[0016] Preferably, the state signaling device is designed to signal the start and / or end of the detection of vibrations during the opening movement and / or the closing movement as a function of a signal from the door control.

[0017] This has the advantage that the signal can be obtained in a very simple manner.

[0018] Preferably, at least one accelerometer is designed to detect vibrations of the floor door during the opening movement and / or the closing movement. Preferably, at least one accelerometer is designed to detect vibrations in the direction of the opening movement and the closing movement of the car door. Preferably, the accelerometer is designed to detect vibrations in a plane spanned by the transmitter strip and the receiver strip in a direction perpendicular to the transmitter strip and / or the receiver strip. Preferably, the accelerometer is arranged in the upper half, in particular in the upper quarter, in particular at the upper end of the transmitter strip and / or the receiver strip with respect to the mounting position.

[0019] This can achieve the advantage of improving the signal-to-noise ratio and increasing reliability.

[0020] Preferably, the detection device has two vibrometers, wherein a first vibrometer is fastened to the transmitter bar and a second vibrometer is fastened to the receiver bar, wherein both the transmitter bar and the receiver bar are provided for fastening to a car door.

[0021] The evaluation of the measurements of the two vibrometers can be performed separately for each vibrometer or by averaging the measurements of the two vibrometers.

[0022] This can achieve the advantage that reliability is increased.

[0023] Preferably, the evaluation device is designed to generate the vibration curve from an analysis of the time profile of the vibration, in particular by a time domain analysis, a frequency domain analysis and / or a sequence analysis. The analysis can form the above-mentioned derived state.

[0024] This can achieve the advantage that a subsequent comparison for determining the floor can be carried out particularly reliably and / or more quickly.

[0025] Preferably, the evaluation device is designed to generate a reference vibration curve for each floor from one or more vibration curves in a learning phase and to store it.

[0026] This can achieve the advantage that the detection device can be used universally in elevators.

[0027] The elevator according to the invention is an elevator having at least two floors, the at least two floors having the detection device according to the invention as described above.

[0028] Other features of the invention are illustrated in the accompanying drawings.

[0029] The advantages mentioned in each case can also be achieved by combinations of features not mentioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Embodiments of the present invention are shown in the drawings and are described in detail below. The same reference numerals in the various drawings represent corresponding elements. In the drawings:

[0031] Figure 1 Showing 2 car doors and floor doors,

[0032] Figure 2 Showing the car door and the floor door with coupling device,

[0033] Figure 3 Shows the car door distance measurement diagram,

[0034] Figure 4 Shows the vibration characteristics of different floors. DETAILED DESCRIPTION

[0035] Figure 1 An elevator car 20 is shown in a parking position on a floor 10. The floor has two shaft doors 11. The car has two car doors 21. The shaft doors and the car doors are designed as sliding doors. The car door 21 can be moved in a sliding direction by a motor to perform an opening movement or a closing movement. The car door 21 is connected to the shaft door 11 via a coupling device 30 in the parking position, so that the shaft door performs the movement together in the same way when the car door is driven by the motor. The transmitter strip 41 and the receiver strip 43 of the light grid are respectively fixed vertically on the outside of the car door flush with the edge of the car door pointing in the closing direction. The transmitter strip 41 and the receiver strip 43 each have an accelerometer 43 integrated in the housing, which has an evaluation device not shown. The accelerometer is arranged in the housing at about 20 cm from the upper end of the corresponding strip.

[0036] Figure 2 Specifically shown are the car door 21 and the shaft door 11, which are connected via a coupling device 30. The coupling device has a roller 31, which is fixed with its axis to the shaft door 11, and two drive plates 32, which are fixed to the elevator door. The drive plates are arranged so that in the parking position they move the roller in the horizontal direction, thereby transmitting the movement of the driven car door to the shaft door. Vibrations are transmitted from the shaft door to the car door via the coupling device.

[0037] Figure 3The distance measurement diagram of the light barrier on the car door during the opening movement is shown. The vertical axis 51 shows the intensity. The horizontal axis 53 shows the time curve. The time curve is approximately proportional to the distance. The curve 60 shows the intensity detected by the receiver strip as a function of the distance from the transmitter strip. This corresponds to the distance between the two car doors. The time point 61 corresponds to the completely closed car door at the beginning of the opening movement. The time point 62 corresponds to the end of the opening movement when the car door is completely open.

[0038] Figure 4 A diagram with five vibration characteristics 70 is shown, which correspond to different floors. The vertical axis 52 shows the vibration amount. The horizontal axis 53 shows the time curve. The time points 61 and 62 for the start and end of the opening movement are taken from Figure 3 The five vibration characteristics 70 have characteristically different variation curves.

[0039] List of Reference Numerals

[0040] 10th Floor

[0041] 11th floor door

[0042] 20 Car

[0043] 21 Car door

[0044] 30 Driving device

[0045] 31 Drive roller

[0046] 32 driving piece

[0047] 41 Launcher Bars

[0048] 42 Receiver Strip

[0049] 43 Accelerometer

[0050] 51 Strength

[0051] 52 Vibration intensity

[0052] 53 Time

[0053] 60 Time variation curve of distance

[0054] 61 Open the start of the movement

[0055] 62 Open the end of the movement

[0056] 70 Vibration characteristics.

Claims

1. A detection device, - for an elevator having a car with at least one car door, the car door being designed to perform an opening movement and a closing movement when the car is stopped at a floor, - used to determine the floor when the elevator car stops at that floor, - has at least one accelerometer, the at least one accelerometer is used to detect vibrations of the car door during the opening movement and / or the closing movement, - having an evaluation device, which is designed to: - generating a vibration curve from the detection of vibrations during the opening and / or closing movement, - in a learning phase, for each of the at least two floors a reference vibration curve is generated from one or more vibration curves and stored, - outside of said learning phase, comparing the currently recorded vibration profile with these existing reference vibration profiles, - determining, by said comparison, a reference vibration profile which best matches said currently recorded vibration profile, - and thereby determine the appropriate floor, It is characterized in that - the detection device has a grating, the light barrier is used to detect objects in the area of ​​the opened car door, and the light barrier has transmitter strips and receiver strips, wherein at least one of the strips is provided for mounting on the car door, - wherein the at least one accelerometer - is arranged on a transmitter strip or a receiver strip provided for fastening to the car door.

2. The detection device according to claim 1, characterized in that: - the at least one accelerometer - having a common carrier or a common housing with the transmitter bar and / or the receiver bar.

3. The detection device according to claim 1 or 2, characterized in that: - the detection device has a status signaling device, - the state signal device is used to output a signal of the start and / or end of vibration detection, - wherein the signal is not obtained in particular from vibration detection, and - wherein the evaluation device is designed to: - deriving the start and the end of said detection from said signal.

4. The detection device according to claim 3, characterized in that: - the status signaling device - consists of the light barrier and the evaluation device, - and the grating is designed as follows: - detect the distance between the transmitter bar and the receiver bar, - in particular by detecting the intensity received, - and the evaluation device is designed to: The temporal start and / or end of the detection of the vibrations during the opening movement and / or the closing movement is determined from the detection of the distance and is in particular associated with the determined distance value.

5. The detection device according to claim 3 or 4, characterized in that: - The state signaling device is designed to: - forming a signal for the start and / or end of the detection of vibrations during the opening movement and / or the closing movement as a function of a signal from a door control.

6. A detection device according to any one of the preceding claims, It is characterized in that - the at least one accelerometer - is designed to detect vibrations of the floor door during said opening movement and / or said closing movement and - is particularly designed to detect vibrations in the direction of the opening and closing movement of the car door, and - is designed in particular for detecting vibrations in a plane spanned by the transmitter strip and the receiver strip in a direction perpendicular to said transmitter strip and / or receiver strip, and With regard to the mounting position, it is arranged in particular in the upper half, in particular in the upper quarter, in particular at the upper end, of the transmitter strip and / or receiver strip.

7. A detection device according to any one of the preceding claims, It is characterized in that - the detection device has two vibrometers, -in, A first vibrometer is fastened to the transmitter bar and a second vibrometer is fastened to the receiver bar, both the transmitter bar and the receiver bar being provided for fastening to a car door.

8. A detection device according to any one of the preceding claims, It is characterized in that - the evaluation device is designed to: The vibration curve is generated from an analysis of the time profile of the vibration, in particular by a time domain analysis, a frequency domain analysis and / or a sequence analysis.

9. A detection device according to any one of the preceding claims, It is characterized in that - the evaluation device is designed to: In the learning phase, a reference vibration curve is generated for each floor from one or more vibration curves and stored.

10. An elevator having at least two floors, the at least two floors having a detection device according to any one of the preceding claims.

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