Abstract:
The invention relates to a load measuring device including a deformable component (10) configured to be deformed under a load to be measured and a sensor assembly (12) attached to a first portion of said deformable component (10) and to a method for determining load using such a sensor assembly (12). It is proposed that the sensor assembly (12) includes at least one acceleration sensor (14) configured to detect a change in an orientation of said first portion with regard to the direction of gravity (G) and that said deformable component (10) is formed as a seal (10) configured to be in sliding contact with a component (20) configured to rotate in relation to the seal (10).
Abstract:
A method of determining torsional deformation in a drivetrain e.g. of a wind turbine. To provide a reliable and simple deformation assessment, the method comprises the step of generating a first signal representing first rotational speed of a low speed shaft, generating a second signal representing the second rotational speed of a high speed shaft, and determining torsional deformation based on changes in the ratio between the first and second signals.
Abstract:
A torsional sensing load cell (100) comprises a load sensing member (60) having first and second deflecting portions (65, 67). Force-receiving areas are defined on upper and lower surfaces of the deflecting portions for bearing a load and its corresponding reactive force. This imposes a torque on the load sensing member (60) which is detected by transducers (202, 204) positioned to detect torsional stress. The transducers are coupled in a bridge circuit and are placed such that the output signal of the circuit is insensitive to the location of an applied load.
Abstract:
Federkörper für einen Kraftaufnehmer, wie einen Drehmoment, Zugkraft- und/oder Druckkraftmesszelle, der in ein Kraftübertragungsteil, wie eine Welle oder Stellstange, einbaubar ist oder eingebaut ist, umfassend: einen Krafteinleitungsabschnitt zum Aufnehmen der Kraft, einen Kraftableitungsabschnitt zum Weitergeben der Kraft, einen dazwischen liegenden elastischen Verformungskörper, der derart den Kraftableitungsabschnitt mit dem Krafteinleitungsabschnitt koppelt, dass die von dem Krafteinleitungsabschnitt aufgenommene Kraft in den Kraftableitungsabschnitt übertragen wird, und der an wenigstens einer Stelle eine vorbestimmte, durch die zu übertragende Kraft veranlasste, elastische Deformationsbewegung ausführt, und einen Codierabtastabschnitt, der an der wenigstens einen Stelle des Verformungskörpers sämtlichen Deformationsbewegungen der wenigstens einen Stelle folgend vorgesehen ist.
Abstract:
A force balance sensor including a mechanical strain amplification system including a sensor torsion member having a first end and a second end spaced from one another along a longitudinal axis of the sensor torsion member, at least one strain sensor coupled to the sensor torsion member between the first and second ends, a first torsional stiffening member coupled to the first end of the sensor torsion member, and a second torsional stiffening member coupled to the second end of the sensor torsion member, wherein the first torsional stiffening member and the second torsional stiffening member are coupled to a torque member.
Abstract:
A method of determining a time-dependent gradient of a shock wave in a percussion or subjected to a percussion load ferromagnetic element and including subjecting the ferromagnetic element to action of a magnetic flux, providing a voltage measuring instrument associated with the ferromagnetic element for determining a change of a magnetic flux velocity, which is determined as a change in a measuring voltage, during a percussion action, and determining the gradient of the shock wave by additive superimposition of the measuring voltage; and a device for effecting the method.
Abstract:
A torsional sensing load cell comprises a load sensing member having first and second deflecting portions. Force-receiving areas are defined on upper and lower surfaces of the deflecting portions for bearing a load and its corresponding reactive force. This imposes a torque on the load sensing member which is detected by transducers positioned to detect torsional stress. The transducers are coupled in a bridge circuit and are placed such that the output signal of the circuit is insensitive to the location of an applied load.
Abstract:
Load limiter making it possible to set off an electric signal subsequent to a tensile stress exceeding a certain maximum value. It is based on the principle of rotation by axial stretching of a twisted part, the said rotation deplacing an armature of an electric contact switch.