Monitoring Device for a Motor-Driven Door

Abstract

A monitoring device for a motor-driven door with a door controller for detecting a crash of a moving object with the door and for communicating information as to whether a crash has occurred to the door controller, wherein the monitoring device is equipped with at least one sensor for monitoring movement, shaking and / or vibration of the door in a Z axis, which sensor is disposed in and / or on the door leaf of the door, and wherein there is provided an analyzer unit, which is designed as an analyzer unit that analyzes the signals of the sensor and transmits an information stream to the door controller.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This patent application is based on and claims convention priority under 35 USC Section 119 on German patent application no. DE 10 2007 014 626.6 having a filing date of 23 Mar. 2007, German patent application no. DE 10 2007 014 627.4 having a filing date of 23 Mar. 2007, European patent application no. EP 07 / 111,823.6 having a filing date of 5 Jul. 2007, and European patent application no. EP 08 / 102,370.7 having a filing date of Mar. 7, 2008, each of which is incorporated herein in its entirety.BACKGROUND OF THE INVENTION[0002]The invention relates to a monitoring device for a motor-driven door.[0003]From the prior art (DE 4313063 C2) there is known a rolling door with a flexible curtain.[0004]The curtain of this prior art rolling door is made of a polycarbonate material, which has considerably lower bending resistance and much greater elastic deformability than steel, for example, so that the curtain yields elastically without buckling ...

AI Technical Summary

Benefits of technology

[0023]If the door suffers a crash, however, for example because a fork-lift truck passing through the door in the Z axis collides with door while it is only partly opened, distinct acceleration of the door in the Z axis takes place and is detected with the monitoring device mounted on the door as provided by the invention. Since analysis of the acceleration in the Z axis is adequate for detection of a crash, it is sufficient to use a monoaxial acceleration sensor in the inventive monitoring device and to mount it in such a way that it can analyze the accelerations in the Z axis of the door.

[0040]The inventive monitoring device has the advantage that it does not require expensive switching elements, which are also susceptible to wear, and that there is no need for mechanical adjustments of the sensors in or on the guide elements. Furthermore, the device has the advantage that it does not suffer any wear or damage and that a special construction is not necessary.

Problems solved by technology

These prior art devices have the disadvantage that it is a very complex matter to dispose sensors in the region of the guide elements.

Furthermore, the sensors, which are usually constructed as maintained-contact or momentary-contact switches with a pre-tensioned spring, undergo a certain amount of wear, since mechanical contact must take place between their actuating elements and the guide elements of the door during each door movement.

The prior art device (DE 29623551 U1) also has the disadvantage that it is not possible to distinguish between a crash or a collision due to an object located under the door, and so each pulse transmission is interpreted as a crash.

Furthermore, this device has the disadvantage that it must be adapted in each case to the specific door width.

This device has the disadvantage that the device must be adapted to the specific door width and that two additional contact bar are necessary in order to be able to detect a crash.

Furthermore, this prior art device has the disadvantage that the signal is transmitted via a coiled cable to the door controller.

The coiled cable is disadvantageous, since it is subject to great wear, because it must follow the door leaf during each door movement.

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