Anti-climbing device

Abstract

An anti-climbing device on a fence (7) with angled arms (2) as protective devices having a planar element (1) fastened to the protective device. The planar element is connected to the protective device via force sensors (3). The force sensors are operatively connected to an evaluation unit (4). The force sensors are load cells which predominantly detect loading or load reduction in the direction of gravity. The planar element is fastened along the plane spanned by the arms and the planar element is connected via the force sensors to the arms.

Claims

1. A climb-over protection device on a fence (7) with angled arms (2), the climb-over protection device including a planar element (1), wherein the planar element (1) is connected to two successive angled arms (2) via force sensors (3), the force sensors (3) are operatively connected with an evaluation unit (4), the force sensors (3) are load cells, which detect primarily loading or load reduction in the direction of the force of gravity, the planar element (1) is oriented parallel to a plane spanned by the angled arms (2), the planar element (1) is formed from two edge profiles (11) and tubular, elongate elements (12) which extend over the distance between the two edge profiles (11) and are oriented adjacent to each other between the two edge profiles (11), and each of the two edge profiles (11) lies on an associated cantilever arm (2) parallel but slightly spaced apart relative to the associated cantilever arm (2), and in each case two force sensors (3) designed as load cells are provided for fastening of the respective edge profile (11) to the associated cantilever arm (2).

2. The climb-over protection device according to claim 1, wherein the evaluation unit (4) includes a load threshold value, above which an alarm is triggered.

3. The climb-over protection device according to claim 1, wherein the evaluation unit (4) stores previous readings and compares them to subsequent readings, wherein a maximum change in readings is predetermined, above which an alarm is triggered.

4. The climb-over protection device according to claim 1, wherein the evaluation unit (4) stores previous readings and compares them to subsequent readings, wherein a maximum rate of change in readings is predetermined, above which an alarm is triggered.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

(1) The following is an illustrative example of the invention is described in detail with reference to the accompanying FIGURE.

(2) It shows:

(3) FIG. 1 a climb-over protection on a fence.

DETAILED DESCRIPTION OF THE INVENTION

(4) In FIG. 1 the upper part of a fence 7 is shown in side view. The fence 7 has posts 71 anchored vertically in the ground along the boundary to be protected by the fence 7, wherein fence mesh 70 is attached between adjacent posts 71. In FIG. 1 just the top of the post 71 with his head end 73 is shown. The fence 7 can have a fence mesh 70 with tubular elongated elements 72, in which, for example, an optical detection system according to the not yet published utility model application DE 20 2014 103 386.6 is arranged.

(5) At the head end 73 of the fence 7 an arm 2 is fixed so that its free end is pointed diagonally upwards approximately at an angle of 45 to the vertical inside of the fence post 71. An arm 2 is attached at every post 71 so that between two adjacent posts 71 standing side by side with the associated outriggers 2,2 a planar element 1 is attached between two consecutive arms 2,2.

(6) Here the planar element 1 is comprised of a section, like the fence mesh 70 of the fence 7. In a preferred embodiment, this planar element 1 thus also has tubular elongate elements 12, which for the distance between two adjacently arms 2,2 span over the distance between two edge profiles 11. The edge profile 11 is aligned parallel but slightly spaced from the arm 2, wherein two load cells functioning as force sensors 3 are provided for the attachment of the respective edge profile 11 on the arm 2. For mechanical connection angle brackets 21 are provided on the arm 2, and corresponding angle brackets 13 are provided as well on the edge profile 11. It is important that the planar element 1 as a climb-over protection device of the fence 7 is arranged slightly spaced from the arms 2.

(7) In the event of a load on the planar element 1, the load cells 3 arranged between the planar element 1 and the arm 2 measure a corresponding load change Z, which then via an evaluation unit 4, with which the load cells 3 are connected via operating connections 31, on exceeding a predetermined load threshold value, trigger an alarm via alarm device 41.

(8) In addition to the sensors specified here for a possible load on the planar elements 1, suitable detection sensors can be provided on the planar element 1 and in particular on the tubular or z-shaped, elongate elements 12 in order to detect tampering with the respective structure, report and to trigger the alarm. Of course, any force sensors can be used that can detect an excessive load on the respective planar elements 1 at the corresponding installation location. Preferred are load cells 3 with strain gauges. It should also be noted that the load cells 3 are arranged on the side away from the attack. Therewith, attempts at manipulation made directly on the load cells 3 are prevented.

(9) If preselected suitable load thresholds are stored in the evaluation unit 4, then significantly lower loads, such as wind-induced stress or birds sitting on the planar element, etc. do not to trigger an alarm. Alternatively or additionally, it is possible that the evaluation unit 4 also continuously or recurrently measures the respective preceding load values and stores and compares them with each other. In this case, a slowly changing load signal can be defined as permissible, while a stronger change in measured value (larger gradient) triggers the alarm. This can be used to disregard slow-building loads, such as snow loads.

LIST OF REFERENCE NUMBERS

(10) 1 planar element 11 edge profile 12 tubular, elongated element 13 second angle bracket 2 arm 21 first angle bracket 3 force sensor, load cell 31 operative connection 4 evaluation unit 41 alarm device 7 fence 70 fence mesh 71 post 72 elongated element, tube 73 head end Z load change