In a method for determining the elongation of segments of a chain of a chain drive during operation, a plurality of measured values is determined at different positions of the chain. A plurality of length values is determined from the plurality of measured values and the length values are assigned to the segments of the chain, with the length of the segments of the chain being smaller than the length of the chain.

In a method for determining the elongation of segments of a chain of a chain drive during operation, a plurality of measured values is determined at different positions of the chain. A plurality of length values is determined from the plurality of measured values and a position of the segments of the chain is determined. The length values are assigned to the segments of the chain, with the length of the segments of the chain being smaller than the length of the chain.

The present disclosure discloses a sensing system for sensing a position of a gear shaft. The present disclosure may implement determination of whether the gear shaft is at a reverse gear position, a forward gear position or a neutral gear position by: partitioning a magnet into a first length region magnet and a second length region magnet, wherein the first length region magnet and the second length region magnet have different magnetic field directions, sensing and generating an inductive electrical signal reflecting motions of the first length region magnet and the second length region magnet; storing, by a memory unit, a first type reference signal for the first length region magnet and a second type reference signal for the second length region magnet, which are sensed by simulation; and comparing, by a processing unit, the inductive electric signal against the first type reference signal and the second type reference signal, which reflect different gear positions, respectively. By arranging only one magnet and one set of circuitry mechanical elements to sense a position of the gear shaft, the sensing apparatus according to the present disclosure effectively implements detection of the neutral gear position and the reverse gear position of the gear shaft, which reduces the manufacturing cost and lowers the failure rate.

A stroke detection device for detecting, along a longitudinal direction, a stroke amount of a spool arranged in a valve main body. The stroke detection device includes: a device main body attached to the valve main body; a detection rod extending along the longitudinal direction of the spool, and movably arranged along the longitudinal direction inside the device main body, in a position where a tip end portion faces an end surface of the spool; a stroke detection unit configured to output a detection signal according to the stroke amount of the detection rod with respect to the device main body; and an attracting unit arranged in the tip end portion of the detection rod, the attracting unit being attracted to the end surface of the spool by magnetic force.

An electronic interactive device includes an interaction surface for use with a user borne device. The interaction surface includes a contact detection surface for detecting a device contact event with the interaction surface; a plurality of magnetometers defining a reference coordinate system and a sensing volume proximate to the interaction surface, with each of the magnetometers having a rigid spatial relationship to the other magnetometers; and processing circuitry communicably coupled to at least the contact detection surface and the plurality of magnetometers. The plurality of magnetometers perform magnetic field measurements and provide measurement data to the processing circuitry. The processing circuitry determines at least one of position and/or magnet orientation relative to a longitudinal axis of the user borne device and a distance separating the magnet and/or magnet orientation relative to a longitudinal axis of the user borne device from the interaction surface when the contact event occurs.

An apparatus includes a first portion having a first housing, an electronics assembly disposed within the first housing, and a wheel assembly rotatably coupled to a first end portion of the first housing. The wheel assembly includes a wheel configured to rotate in response to being moved along a surface, and a magnetic member operably coupled to the wheel and configured to change a magnetic field in response to the rotation of the wheel. The electronics assembly is configured to determine a measurement associated with the surface based on the change in the magnetic field. The second portion includes a second housing having a first end portion configured to removably couple to a second end portion of the first housing, and a second end portion configured to at least partially house at least one of a writing instrument or an output instrument.

The present disclosure relates to chain monitoring systems and methods. In particular, the chain monitoring system is configured to mount onto a portion of a chain and measure one or more parameters associated with one or more characteristics of the chain. The measured parameters are processed by the chain monitoring system and/or transmitted to a remote system for analysis. The analysis may be used to determine a characteristic and/or change in the characteristic of the chain. In some examples, the characteristic is an elongation value associated with the chain, which can be transmitted to a networked system for analysis, display, and/or control. In some examples, a sensor can be employed to measure one or more characteristics of the chain. The sensor may include, but is not limited to, a strain gauge, an accelerometer, an optical, a sonic, and/or a magnetic sensor.

Embodiments provide a device, a tire pressure measurement system, a tire, a vehicle, a method and a computer program for determining information indicating a length of a footprint of the tire. The device for determining information indicating a length of a footprint of a tire includes an input for a signal from a magnetic earth field sensor configured to generate the signal indicating a measured magnetic earth field. The device further includes a processing module, which is configured to determine the information indicating the length of the footprint of the tire based on the signal indicating the measured magnetic earth field.

A smart belt and a control method thereof are provided, in which a belt device is provided, including a strap portion comprising a plurality of magnet patterns, a first sensor portion configured to sense one of the plurality of magnet patterns while the strap portion is being fastened to a buckle portion, and a controller configured to obtain a length of a waist circumference of a user that corresponds to the magnet pattern sensed by the first sensor portion. The belt apparatus may additionally include a clip portion connecting the strap portion with the buckle portion, and a second sensor portion configured to measure a tension exerted on the clip portion while the strap portion is being fastened to the buckle portion. The controller may correct the length of the waist circumference using a waist circumference correction value corresponding to the measured tension.

The invention relates to a chain elongation monitoring device having a first differential transformer, a second differential transformer, and a control for recording the measured values, wherein the second differential transformer is arranged at a fixed distance from the first differential transformer, and a method for operating the chain elongation monitoring device.