Measuring device for determining the mechanical stress in an elongated tension member, in particular in a shroud

Abstract

Measuring device (1) for determining the mechanical stress in an elongated tension element (3), in particular in a shroud, comprising • at least one device (4) for detecting a vibration-dependent physical parameter of the traction element (3), • and an evaluation unit (5), wherein the evaluation unit (5) is set up to determine the mechanical stress of the traction element (3) as a function of the detected vibration-dependent parameter.

Description

[0001] Mechanical measuring devices are known for determining the tension in shrouds or ropes, which enable force measurement via deflection or deflection of the rope. Such devices are often material-dependent, limited to certain diameters, or structurally complex.

[0002] Furthermore, it is known that the mechanical stress of a tensioned tensile element is related to its vibration behavior.

[0003] The object of the invention is to provide a compact and easy-to-use measuring device that enables a reliable determination of the mechanical stress of a tensile element.

[0004] The problem is solved by a measuring device with the features of claim 1: The measuring device according to the invention comprises at least one device for detecting a vibration-dependent physical parameter of a traction element and an evaluation unit for determining the mechanical stress as a function of this parameter.

[0005] The mechanical stress of a tensioned tensile device is physically related to its vibration behavior.

[0006] In particular, the mechanical stress can be determined from a natural frequency or another vibration-dependent parameter, taking into account at least one geometric or material-specific parameter of the tensile element.

[0007] Such parameters can include, in particular, a free vibration length, a linear mass density, a diameter, a cross-section, or a material-specific characteristic value.

[0008] The evaluation unit can be configured to take such parameters into account. These parameters can be predefined, measured, calculated, or determined from stored calibration data. An embodiment of the measuring device (1) is shown in Fig. 1 schematically represented.

[0009] The measuring device (1) comprises a housing (2), which is preferably designed as a portable, compact device and is configured for detachable attachment to a tensioning element (3). Attachment can be effected in particular by clamping, fitting, or attaching.

[0010] A device (4) for detecting a vibration-dependent physical parameter of the traction element (3) is arranged in the housing (2).

[0011] Furthermore, the measuring device (1) includes an evaluation unit (5) which is set up to determine the mechanical stress of the traction element (3) depending on the parameter recorded.

[0012] Optionally, an excitation device (6) can be provided by means of which the traction element (3) can be excited to a mechanical vibration.

[0013] Furthermore, an interface (7) may be provided through which measurement data can be transferred to a mobile device.

[0014] The interface (7) can be designed as a wireless radio connection, in particular as a Bluetooth or similar short-range connection.

[0015] The illustrated embodiment is merely an example; the measuring device can be designed differently. Reference symbol list 1 measuring device 2 cases 3 traction elements 4. Recording setup 5 evaluation unit 6 Stimulation device 7 Interface

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