DE102007051133B4 - Revolving door system with a sensor device for monitoring vertical door edges - Google Patents

Abstract

Revolving door system with a sensor device (9, 12, 14, 15) for monitoring vertical secondary closing edges (4), which comprises a transmitter and a receiver, the transmitter generating a light beam (5) which runs along the vertical secondary closing edge (4) and wherein the receiver receives the light (5) emitted by the transmitter, characterized in that an element of the sensor device is mounted in the region of the floor, preferably in or on the floor in front of the vertical shunt edge, the sensor device being arranged in front of a vertical shunt edge and has several receivers and / or transmitters that are less than 3 cm apart.

Description

The invention relates to a revolving door system with a sensor device for monitoring vertical door edges according to the preamble of claim 1.

State of the art

From the European patent application EP 1 375 808 A2 a sensor device for an automatic revolving door system is known. The revolving door system has a rotary wing and a drive device and a control device. A sensor is used to detect persons or objects in the range of movement of the revolving door leaf and for this purpose comprises a transmitting device for emitting light beams, a detector device for detecting light beams and a signal transmission device for transmitting the sensor signals to the control device.

The sensor is arranged with several sensor elements and several detector elements in the area of the vertical secondary closing edge of the rotary vane in the upper area of the door. A light beam of the transmitting element runs near or at least almost parallel to the vertical side closing edge of the door leaf.

Another device for monitoring motor-driven swing doors, the door leaves are equipped with attached to the top edge sensor bar is from the German patent DE 44 15 401 C1 known. The sensor bar emits a beam cone directed towards bathing.

The CH 653 975 A2 The focus is on monitoring the widest possible area in front of the door front of a sliding door so that it can be operated at a temporally acceptable closing or opening speed. The EP 1 375 808 A2 It deals with the monitoring of the secondary closing edge of a revolving door, based on the evaluation of the light intensity of a single light beam, which is reflected by the ground or by an object penetrating into the area of the light beam.

Purpose and advantages of the invention

The invention has for its object to provide a revolving door system for the monitoring of vertical door edges, with which a higher security can be achieved.

This object is solved by the features of claim 1. In the dependent claims advantageous and expedient developments of the invention are given.

The invention is based on a revolving door system with a sensor device for the monitoring of vertical door edges, which comprises a transmitter and a receiver, wherein the transmitter generates a light beam which runs along the vertical door edge and wherein the receiver receives the light emitted by the transmitter. The door system is intended to affect all types of doors, e.g. As well as sliding doors, for example lift doors, but also Rolltorsysteme, in which the lateral edges are to be regarded as vertical closing edges. The system is also suitable for non-automatic door systems.

The essence of the invention is that an element of the sensor device in the region of the bottom, preferably in or on the ground in front of a vertical door edge is mounted.

It is also conceivable, the arrangement of the element comparatively close to the ground, z. B. at a distance of less than 15 cm in a preferred embodiment at a distance of less than 5 cm. For gates, this positioning should be achieved at least in the closed state of the gate. This allows a sensor device to be constructed such that light always passes from the transmitter to the receiver only via system-matched optical components associated with the system. In conventional sensor systems, a common surface for the operation of the sensor system is used in the floor area, which the system finds more or less arbitrarily after installation. This is usually a conventional floor section. This makes the system error-prone and inaccurate. By attaching an optical element of the sensor device in the bottom region, an optically defined path for light rays along a vertical door edge can be created.

Furthermore, it is preferred if the sensor device is designed in such a way that light emitted by the transmitter returns directly or at least via a separate optical reflector to the receiver. Ie. Light passes either without further reflections on a direct path from the transmitter to the receiver or at least one specific reflector is used, which does not substantially attenuate the reflected light, z. B. not more than 50%, better less than 30%. The characteristics of the reflector are preferably known to the system, the system being adapted to the reflector.

By doing so, a receiver does not have to evaluate the light reflected from undefined objects, but can either process the light coming directly from the transmitter or reflected by the separate reflector with defined characteristics. The light returned to the transmitter in this way has one around many times higher intensity than undefined surfaces, such as light reflected back from the ground. This light signals are available at the receiver, which are regularly well above the level of disturbing ambient light or scattered light. As a result, a system thus also has a signal-to-noise ratio which, compared to systems that are sensitive to object reflections of the environment, e.g. B. working on ground sections, has significantly better values.

In this way, such monitoring is störungsunanfälliger.

A door system can be located on either side of a door, i. H. inside and outside are used.

Furthermore, it is preferred if a light path is formed laterally offset to a vertical door edge to z. As fittings or doorknobs that are in the room to take into account.

If an object comes into the light beam, the interruption is detected and not such. B. in the EP 1 375 808 A2 even an increase in light intensity, because the penetrating object provides better reflection properties than the ground, which in a case without detection, reflects the light back.

An interruption of a light beam can be clearly detected. In addition, this embodiment has the advantage that a comparatively small "light cross section" can be used for the evaluation, whereby a significantly higher accuracy in the detection of objects can be achieved. With such a construction, an accuracy of less than 1 to 0.5 cm can be realized with a view to detecting an object in an area to be monitored.

In a particularly preferred embodiment, the transmitter and the receiver are arranged on opposite sides of a door edge. In such an arrangement, the light is sent directly from the transmitter to the receiver without a reflector. However, it is also conceivable that the transmitter and the receiver are arranged on one side of the door edge and is provided on an opposite side of the reflector.

Regularly, it will then be the case that at least one of the components is arranged in a floor area on the door.

It has been found that with regard to polluting or damaging a surface, it is easy to control, for. B. to arrange a receiver or a reflector in the ground in front of a door edge. By directly evaluating a light beam, even some contamination and / or scratching of the surface of a bottom part of the sensor device can be accepted, since the evaluated light then still has a sufficient intensity, which is much greater than in the known embodiments, the Z. B. light reflected from the ground.

For a detection of small objects is possible, especially if z. B. several transmitters are used, each of which generates a beam of light. The light beams can be comparatively close to one another or have a comparatively small cross section. Thus, correspondingly small objects can be detected when they interrupt a light beam. In contrast to the embodiment according to the EP 1 375 808 For example, a decision as to whether or not an object is in the detection area is not determined based on an intensity value within a given intensity detection area, but by determining that a beam is interrupted. This is done regularly by having light intensity values that are below a still detectable threshold.

In this way, smaller objects can be detected with much greater reliability.

Depending on the configuration of the size of a beam cross-section or the number of steels, it is possible by means of this procedure to monitor areas smaller than 3 cm, preferably smaller than 1 or 0.5 cm. The areas are then less than 3 cm, preferably less than 1 or 0.5 cm apart, adjacent to each other or even overlap. For example, an area smaller than 10 × 10 cm is monitored with multiple light beams.

When using several comparatively "thin" light beams, even small objects completely cover a light beam and can thus be clearly and reliably detected.

In this way it is also possible, small objects, such. B. children's fingers with appropriately geometrically designed light beams to capture safely. Depending on the requirements from the outside, z. B. because certain edges are in a detection field of multiple light beams, preferably single or multiple light beams can be hidden.

For detecting light beams emitted by multiple transmitters, it is preferable to use a plurality of receivers. For example, each light beam is assigned a receiver.

Preferably, means are provided to hide light rays before parts of the door systems cause an unwanted interruption. In this connection will be on the documents DE 44 15 401 C1 such as EP 09 02 157 B1 referenced, in which solutions for hiding light rays are described.

In the event that light is passed over a separate reflector, a retroreflector is preferably used. Retroreflectors reflect incident light largely independent of the orientation of the reflector, largely in the direction of the incident light back.

Furthermore, it is preferred if the reflector reflects light back in a predetermined pattern. In this way, it is possible to distinguish between light reflected by the reflector and scattered light from the environment, if appropriate also from an object reflected light, which improves the reliability of the sensor device.

For example, a pattern of the reflector arises due to different reflectivities in the reflector field. A pattern on the reflector can also be designed so that it can be seen, oh light through a reflection, z. B. gets back to the receiver on a glass. To allow such an evaluation, the reflector should have no mirror symmetry. In addition, the reflector orientation should be clearly determined with respect to the sensor. For this purpose, for example, a mark is provided on the reflector, which can bring the user during assembly in a predetermined relation to the recipient.

Preferably, means are provided for evaluating reflection patterns and / or multiple reflections or reflections with the receiver.

Furthermore, an evaluation as to whether or not light originates from the reflector can be made on an evaluation of the polarization properties of the light. Light that z. B. reflected at a retroreflector is polarized. If the receiver is tuned only to a predetermined direction of polarization of the retroreflector, light which has a different polarization property is disregarded. This ensures that only light is detected, which actually comes from the reflector and not in about an object.

Transmitter, receiver and / or reflectors of the sensor device can basically on moving parts, eg. B. a revolving door or a swing door can be mounted. However, it is also possible to attach to fixed parts or on the floor or ceilings in the range of z. B. a door to be monitored.

In a further preferred embodiment of the invention is modulated by one or more transmitters modulated light, which is demodulated by a receiver. In this way, a differentiation between z. B. ambient light and light of a transmitter possible because ambient light does not have the appropriate modulation, and in the demodulation is not taken into account. In this context, it is conceivable that z. B. the phase or the duration of the emitted light is evaluated. In this way distances can be determined. For example, the light is pulsed or sine-modulated for phase analysis.

In a further preferred embodiment of the invention, a plurality of receivers and / or transmitters are integrated in a housing, or even on a chip.

If an element of the sensor device z. B. fixed to a movable part of the door, whereas a further element of the sensor device is fixed, it is preferred that an object evaluation takes place only when the elements of the sensor means can "see".

Is z. B. the reflector attached to a revolving door and the transmitter or the receiver to a fixed wall, then a signal for object detection should only be evaluated when the reflector is in the beam path of transmitter and receiver. For this purpose, for example, a movement of a pattern generated by the reflector is detected, wherein an object detection then no longer takes place if the receiver can no longer detect the pattern.

In addition, it can be provided to activate the sensor device independently of the detection of a light beam. Because it may be the case that in the moment where all elements of the sensor device can "see", z. B. the reflector is just covered by an object, and so no detection of a light beam from the transmitter can take place to initiate the mode of object detection. In this constellation, the sensor means would continue to assume that a positioning of the individual elements relative to one another is not yet present in such a way that object recognition can be carried out. To increase the security in the object detection, z. B. be determined in a learning trip, how much time may pass at most until the elements of the sensor means can "see" again at the latest, when the door is in a normal movement. Should the door deviate from a normal regular course of motion, it is necessary in this case via a control unit to control the sensor device accordingly.

drawings

Two embodiments of the invention are illustrated in the drawings and are further explained below, indicating further advantages and details. Show it

1 in a perspective schematic view of the arrangement of a sensor device to a door and

2 in corresponding representation as in 1 a second embodiment of a arranged on a door sensor device.

Description of the embodiments

In 1 is a passage in a schematic three-dimensional view 1 with a door 2 shown. The door 2 For example, has an automatic drive (not shown), through which the door automatically opens when approaching a person and closes again after a passage.

The door has a vertical main closing edge 3 and a minor closing edge 4 , For monitoring the secondary closing edge 4 along this becomes a ray of light 5 via a sensor device 6 educated. The sensor device 6 covers on a wall 7 in a fall area 6 the door 2 assembles a transmitter and receiver 9 , In one area 10 on a floor 11 in front of the secondary closing edge 4 the door 2 is a reflector 12 on the ground 11 arranged, which is tuned to the transmitter and receiver. Ie. the beam emitted by the transmitter 5 meets the reflector 12 and becomes the recipient 9 reflected back, which is immediately adjacent to the transmitter. Through the reflector, z. B. a retroreflector, reaches the receiver 9 a beam of light with a much higher intensity than if light were being evaluated, just from the ground 11 is scattered back.

Basically, an element of the sensor device should 6 that on the ground 11 is mounted as flat as possible to make the smallest possible installation depth necessary. A ground-mounted element of the sensor device preferably comprises a housing with means for attachment to the ground, e.g. B. with an adhesive layer or mounting holes.

In order for a housing to receive a flat configuration at the bottom, it is further preferred that the material of a housing for the element, for. B. to design a transmitter or a receiver or a reflector as thin as possible. For example, no lenses are used for a receiver or transmitter element. Similarly, the housing should have no lenses to avoid caused by a lens curvature, which requires additional space. As a material, scratch-resistant material such as glass, polycarbonate or PMMA can be used in the housing for the housing and / or a "window" transparent to a transmitter or receiver or a reflector. The material should be transparent to the electromagnetic radiation used.

In 2 also becomes the minor closing edge 4 the door 2 supervised. In this embodiment, a sensor device comes 13 used on which wall 7 in the fall area 8th the door transmitter 14 and on the ground 11 in one area 10 in front of the secondary closing edge of the door receiving means 15 are arranged.

The sending means 14 generate light rays 5 , which of z. B. three individual receivers to the receiving means 15 can be evaluated.

The three individual receivers allow a comparatively high local resolution to be achieved in an area in front of the secondary closing edge. Even comparatively small objects that enter a monitoring area interrupt at least one connection to a receiver, which can lead to an intervention in the door movement. For example, when the door is closing 2 one of the receivers is no longer receiving, initiated an immediate reversal of the closing door.

By using a larger number of receivers one can be reached for finer surveillance. Conceivable are monitoring accuracies of less than 0.5 cm.

With conventional systems for monitoring z. B. Nebenschließkanten, such accuracies due to the evaluation of scattered light of objects or a floor are not rudimentary possible.

LIST OF REFERENCE NUMBERS

1

passage

2

door

3

Main closing edge

4

Secondary closing edge

5

beam of light

6

sensor device

7

wall

8th

lintel area

9

Sender and receiver

10

Area

11

ground

12

reflector

13

sensor device

14

transmitting means

15

receiving means

Claims (13)

Revolving door system with a sensor device ( 9 . 12 . 14 . 15 ) for the monitoring of vertical secondary closure edges ( 4 ) comprising a transmitter and a receiver, wherein the transmitter transmits a light beam ( 5 ) along the vertical minor closing edge (FIG. 4 ) and wherein the receiver transmits the light emitted by the transmitter ( 5 ), characterized in that an element of the sensor device is mounted in the region of the bottom, preferably in or on the ground, in front of the vertical minor closing edge, the sensor device being arranged in front of a vertical shunt edge and having a plurality of receivers and / or transmitters spaced a distance of less than 3 cm to each other. Revolving door installation according to claim 1, characterized in that the sensor device ( 8th . 12 . 14 . 15 ) is configured such that the light emitted by the transmitter ( 5 ) directly or at least via a separate optical reflector ( 12 ) back to the receiver. Revolving door installation according to one of the preceding claims, characterized in that the transmitter and the receiver are arranged on opposite sides of a door edge ( 4 ) are arranged. Revolving door system according to one of the preceding claims, characterized in that the transmitter and receiver on one side of the door edge ( 4 ) and a reflector ( 12 ) are arranged on an opposite side. Revolving door installation according to one of the preceding claims, characterized in that the receiver in the region of a floor ( 11 ) is arranged on the door. Revolving door installation according to one of the preceding claims, characterized in that the transmitter in the area ( 10 ) of a soil ( 11 ) at the door ( 2 ) is arranged. Revolving door installation according to one of the preceding claims, characterized in that the reflector ( 12 ) in the area ( 10 ) of a soil ( 11 ) at the door ( 2 ) is arranged. Revolving door system according to one of the preceding claims, characterized in that a plurality of transmitters and / or receivers are provided. Revolving door system according to one of the preceding claims, characterized in that a transmitter is designed, a bundled light beam ( 5 ) to create. Revolving door installation according to one of the preceding claims, characterized in that the reflector ( 12 ) is a retroreflector. Revolving door installation according to one of the preceding claims, characterized in that the reflector provides a pattern in the reflected light. Revolving door installation according to one of the preceding claims, characterized in that the reflector has polarizer properties. Revolving door system according to one of the preceding claims, characterized in that a transmitter performs a modulation of the light.

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