The invention pertains to a method for respectively determining the neutral temperature or the stressfree state in a rail section (1), wherein an ultrasonic signal is coupled into a representative volume of the rail profile perpendicular to its longitudinal direction, wherein the volume is subjected to stresses in the longitudinal direction of the rail section (1), wherein the stresses are measured, wherein an ultrasonic signal influenced by these stresses is decoupled, wherein a function describing the functional dependence of the decoupled ultrasonic signal on the introduced stress is determined, and wherein the stressfree state is determined based on the course of this function.

A method of generating an operating signal of an electronic device includes: deriving a force measurement value based on a change in inductance of a touch sensing device disposed inside a housing of the electronic device and configured to change inductance by external pressure applied to a touch switching unit of the housing; accumulatively recording the force measurement value derived in the deriving of the force measurement value; setting a reference value based on the recorded force measurement value, in response to the force measurement value being accumulatively recorded until a unit condition is satisfied; and generating an operating signal based on a high and low relationship between the force measurement value derived from the change in inductance occurring after the setting of the reference value, and the set reference value.

A system for measuring torque on a component having a residually magnetized region is provided. The system includes a torque sensor for sensing an electromagnetic characteristic of the component and transmitting a plurality of signals that are indicative of the electromagnetic characteristic. The system also includes a computer communicatively coupled to the torque sensor for receiving the signals. The computer includes a processor and a memory. The processor is programmed to determine, using the signals, that the torque sensor is affected by the residually magnetized region of the component.

The invention relates to a load measurement device (12) for accurately measuring a load in a test object (14) such as, in particular, a chassis component, comprising a magnetic field generating device (18), a first magnetic field detecting device (20), a second magnetic field detecting device (22), and a measurement environment parameter acquisition device (80) for acquiring at least one measurement environment parameter in the test object (14), wherein an evaluation device (42) is configured to generate a measurement signal obtained on the basis of outputs of the first and second magnetic field detection devices (20, 22) in dependence on the at least one measurement environment parameter detected by the measurement environment parameter acquisition device (80).

The present disclosure discloses a safety pipe loop and method for strain monitoring of mountainous pipelines. The safety pipe loop may include a plurality of magnetic test detectors and a protective shell for protecting the plurality of magnetic test detectors. The number of the plurality of magnetic test detectors may be set to 4n, n is an integer number greater than or equal to 1. An angle between any two adjacent detectors of the plurality of magnetic test detectors may be 180°/2n. At least two of the plurality of magnetic test detectors may be connected in parallel through a data transmission line and output data through a data transmission interface. An outer layer of the protective shell may include non-magnetic hard alloy, and an inner layer of the protective shell may include non-metallic materials.

Robots including a lifting actuator for lifting object are disclosed. In one embodiment, a robot includes a rail system extending in a system direction, a body structure coupled to the rail system, the body structure comprising an array of flexible tactile sensors, wherein each flexible tactile sensor of the array of flexible tactile sensors is operable to produce a signal determinative of a magnitude and a direction of a force applied to the flexible tactile sensor, and a lift actuator operable to move the body structure along the rail system.

Techniques for film tensioning in additive fabrication are provided. According to some aspects, a film forming part of a container in an additive fabrication device may be tensioned by different forces along different axes. According to some embodiments, an adjustable tensioning system may be provided within an additive fabrication device that may couple to one or more components of a removable container comprising a film. The tension of the film may be adjusted by the additive fabrication device via the adjustable tensioning system and its coupling to the container.

A system for detecting and quantifying changes in the stress-strain state of a ferrous structure includes an exciter coil system positioned to generate an AC magnetic field that couples into the ferrous structure. A detector apparatus is positioned relative to the exciter to detect an eddy current magnetic field resulting from the AC magnetic field generated by the exciter coil system. An analyzer compares the eddy current magnetic field parameters detected by the detector apparatus with the direct AC magnetic field transmitted by the exciter coil system and correlates changes in the parameters of the eddy current magnetic field with the stress-strain on the ferrous structure.

A force sensor including: a first part including a detection coil; a second part positioned opposite the first part and including: a ferromagnetic plate translationally movable relative to the first part to move towards the first part when a force is transferred to the sensor and to reduce reluctance of a magnetic circuit formed by the first and second parts in series with a variable gap; and an electronic detection circuit configured to generate a signal dependent on the reluctance of the magnetic circuit. The ferromagnetic plate is formed by an amorphous metal alloy.

A device for detecting the intention to lock or unlock a vehicle opening element integrated into a handle and including a housing, a variation in the position of a target occurring under pressure from a user on the handle. A primary coil has turns wound in a plane parallel to the plane of the surface of the target. A receiver secondary coil that receives a magnetic field induced by the primary coil and has its turns wound in a plane parallel to the plane of the turns of the primary coil and with the target at least partially intercalated between the primary and secondary coils when pressure is applied to the handle. A variation in the magnetic field received by the secondary coil is detected by a measurement device for measuring a parameter resulting from the voltage induced in the secondary coil.