Trafag Ag

Christoph Schanz

Tobias Ettenauer

Philipp Cörlin

Dieter Zeisel

Tobias Senkbeil

Philippe Klemm

Philipp Coerlin

The invention relates to a load measurement device () for accurately measuring a load in a test object () such as, in particular, a chassis component, comprising a magnetic field generating device (), a first magnetic field detecting device (), a second magnetic field detecting device (), and a measurement environment parameter acquisition device () for acquiring at least one measurement environment parameter in the test object (), wherein an evaluation device () is configured to generate a measurement signal obtained on the basis of outputs of the first and second magnetic field detection devices () in dependence on the at least one measurement environment parameter detected by the measurement environment parameter acquisition device ().

Device and arrangement for measuring load on a test object, in particular a chassis component

The invention relates to an arrangement () for measuring a mechanical load on a test object, with the detection of changes in the magnetic field, said arrangement comprising a test object (), which extends in a longitudinal direction L, and at least one sensor element () comprising a magnetic field generation device () for generating a magnetic field in the test object () and a magnetic field detection device () for measuring a change in the magnetic field in the test object (). The sensor element () is arranged on a measurement surface () of the test object (), at least one directional component of said measurement surface extending radially and/or transversely to the longitudinal direction L of the test object (). A magnetic field is generated in the test object () and a change in the magnetic field in the test object () is measured on the measurement surface (). The load measured is, in particular, a torque.

Arrangement and method for measuring a mechanical load on a test object, with the detection of changes in the magnetic field

To reduce a hysteresis error, the invention provides a load measurement method () for measuring a load in a test object (), comprising: a) generating a magnetic field in the test object () by means of at least one magnetic field generating coil (Lg) to which a periodically alternating current is applied; b) detecting a magnetic field parameter which changes on the basis of a load in the test object (), using at least one magnetic field detecting device, in order to generate a magnetic field parameter signal () which changes periodically according to the periodically generated magnetic field, characterized by: c) detecting the hysteresis-to-signal ratio of the magnetic field parameter signal () over time within one period; and d) disregarding magnetic field parameter signal values from at least one predetermined timespan within each period in which a maximum hysteresis-to-signal ratio occurs.

Method, device and arrangement for load measurement on a test object

A torque transmitter for a torque sensor for measuring a torque on a shaft includes a carrier plate that includes a plurality of sensor element carrier plate regions, on each of which at least one sensor element for recording magnetic field changes is arranged, and an enclosure region formed in a substantially annular shape to enclose the shaft around a circumference of the shaft. The plurality of sensor element carrier plate regions are perpendicularly connected to the enclosure region and arranged radially within the enclosure region by being spaced apart along a circumferential direction around the circumference of the shaft.

Torque transmitter and torque sensor, manufacturing method thereof, and method of measuring torque using the same

To improve the output signal quality of a load measurement by means of active magnetization, the invention provides a load measurement method for measuring a mechanical load on a test object (), comprising: a) generating and applying a magnetic field to the test object (); b) detecting a magnetic field changed by the test object () as a result of a mechanical load on the test object () by means of a first magnetic field detection device () to generate a first measurement signal (U, UAB), c) detecting a magnetic field changed by the test object () as a result of a mechanical load on the test object () by means of a second magnetic field detection device () to generate a second measurement signal (U, UAB), d) computationally determining a third measurement signal (UBT) from the first measurement signal (U, UAB) and the second measurement signal (U, UAT), and preferably comprising the steps of e) forming a difference from one (U, UAT) of the first and the second measurement signals and the computationally determined third measurement signal (UBT) to produce an output signal, f) determining the mechanical load applied to the test object () based on the output signal. The invention also provides a corresponding load measurement device for carrying out the load measurement method.

Load measuring method, load measuring device and load measuring arrangement

In order to inexpensively measure torque on a shaft such that the measurement is as independent as possible from distance changes or material inconsistencies of the shaft around the circumference thereof, the invention provides a torque transmitter for a torque sensor for measuring a torque on a shaft, having a carrier plate that has a plurality of sensor element carrier plate regions, on each of which at least one sensor element for recording magnetic field changes, caused by the magnetoelastic effect, is arranged, and at least one enclosure region that is designed to at least partly enclose the shaft around the circumference of the shaft, wherein at least one flexible connection region is provided by way of which at least one of the sensor element carrier plate regions is able to be pivoted relative to another sensor element carrier plate region or relative to the at least one enclosure region.

Torque transmitter and torque sensor, manufacturing method and measuring method

The invention provides a pressure sensor () that can be produced at low cost, operates more accurately and resists to high burst pressures. The pressure sensor () comprises at least one membrane () and a magneto-elastic detection device () for magneto-elastically detecting mechanical stress caused by pressurization.

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Frickenhausen, Germany

Christoph Schanz