A rotation calculating system, comprising: a first optical characteristic acquiring device, configured to acquire optical characteristics for at least one feature of a first target device; and a calculating unit, configured to calculate rotation for a first rotating device based on the optical characteristics of the feature of the first target device. The first rotating device is a wheel, and the first target device is the wheel.

A rotation calculating device comprising: a first rotating device; a first target device; an first optical characteristic acquiring device, configured to acquire optical characteristics for at least one feature of the first target device; and a calculating unit, configured to calculate rotation for the first rotating device based on the optical characteristics of the feature.

A compression measuring device includes a substrate configured to be attached to a first location on a stretchable fabric of a worn compression garment. The compression measuring device includes a deformable arm cantilevered across a first end of the substrate, being fixed to the substrate at a fixed end and extending across the first end of the substrate to a cantilevered end of the deformable arm. The compression measuring device includes a bridge attached to the deformable arm at a first end of the bridge and extending away from the deformable arm out past a second end of the substrate. A second end of the bridge is attached to a second location on the stretchable fabric. The compression measuring device includes a strain gauge mounted to the deformable arm and configured to measure an electrical resistance when the bridge pulls on and deforms the deformable arm. The electrical resistance measurement is used to determine a percentage stretch of the stretchable fabric, which is combined with a limb measurement of a user to determine a compression level when the compression garment is worn by the user.

A compression measuring device includes a substrate configured to be attached to a first location on a stretchable fabric of a worn compression garment. The compression measuring device includes a deformable arm cantilevered across a first end of the substrate, being fixed to the substrate at a fixed end and extending across the first end of the substrate to a cantilevered end of the deformable arm. The compression measuring device includes a bridge attached to the deformable arm at a first end of the bridge and extending away from the deformable arm out past a second end of the substrate. A second end of the bridge is attached to a second location on the stretchable fabric. The compression measuring device includes a strain gauge mounted to the deformable arm and configured to measure an electrical resistance when the bridge pulls on and deforms the deformable arm. The electrical resistance measurement is used to determine a percentage stretch of the stretchable fabric, which is combined with a limb measurement of a user to determine a compression level when the compression garment is worn by the user.

A rotation calculating device comprising: a first rotating device; a first target device; an first optical characteristic acquiring device, configured to acquire optical characteristics for at least one feature of the first target device; and a calculating unit, configured to calculate rotation for the first rotating device based on the optical characteristics of the feature.

The present invention relates to a force measurement device that includes mechanical amplification of linear elastic deformation along the axis of loading by estimating the quasi-linear incremental displacement between two points on arcs inscribed due to angular movements of a pair of cantilever arms located on opposite quadrants on a closed contour load sensing element to improve the sensitivity, and hence the resolution, of the force measurement device.

A tension measuring apparatus includes a displacement part that is displaced in accordance with tension or a change of the tension of a wire rod to be measured when the displacement part is caused to abut against the wire rod to receive the tension of the wire rod, an elastic body that is elastically deformed in accordance with displacement of the displacement part, and a heat flow sensor that detects a heat flow caused by elastic deformation of the elastic body.

An energy guiding chain (12) with additional protection against a line break is proposed. It includes link members (20) or segments for guiding one or more lines like cables, hoses or the like, wherein the link members or segments can be angled relative to each other to form a direction-changing curve (28). The protection means includes a detector for monitoring the energy guiding chain. The detector (16) is mechanically operatively connected to a low-stretch triggering cord (30) and has a sensor (36) for detecting a kinematic parameter of the triggering cord (30). A break (13) in the energy guiding chain (12 can be detected in good time by a change in the kinematic parameter. In that way guided cables, hoses or the like can be protected against a line break.

A strain amplification sensor having a first base portion being coupled to a first member to be strain measured, a second base portion being coupled to a second member to be strain measured, and an amplifying lever system pivotally coupled between the first base portion and the second base portion. The amplifying lever system includes attachment locations that induce opposing relative motion resulting in detectable deflection of the amplifying lever system in response to application of strain between the first base portion and the second base portion.

The apparatus for testing the sharpness of a blade is arranged with a tape extending between a feeder spool and a receiver spool. The apparatus applies tension to the tape, and has a carriage arranged to bring the blade into contact with a stretch of the tape. The blade progressively makes a long-ways cut in the tape and, as it does, a measuring device detects the amount of force exerted for the cut to occur to determine whether the blade is sharp. A clamp locks the stretch of tape when in a straight line for contact with the blade, and has a main opening through which the tape moves longitudinally when driven between the spools A guide is arranged to help keep the stretch of tape in the straight line and has a main opening through which the tape moves longitudinally when driven between the feeder and receiver spools.