A sample gauge length and length after fracture measuring device includes a worktable, a first sliding table support and a second sliding table support, a control and length display, a spiral micrometer head, a scriber, a sample, etc. The reading device using the spiral micrometer head to directly measure the gauge length and the length after fracture has a detection accuracy of 0.01 mm, which is superior to the requirement of 0.05 mm in GB/T228 Metallic Materials Tensile Testing at Ambient Temperature.

An apparatus for measuring a plate-shaped workpiece comprises a conveying device for conveying the plate-shaped workpiece in a conveying direction along a conveying path and first and second measuring devices including respective first and second drivers and respective first and second measuring rulers. Each of the first and second drivers is selectively couplable to and decouplable from a main surface of the plate-shaped workpiece. In a coupled state, the drivers are moveable together with the plate-shaped workpiece in the conveying direction and, in a decoupled state, are actively movable in a direction opposite to the conveying direction. The measuring rulers extend in the conveying direction such that the positions and/or movement distances of the drivers in the conveying direction are detectable. The first and second measuring rulers detect different regions of the conveying path of the plate-shaped workpiece in the conveying direction.

Disclosed herein are various devices, systems, and methods for use in agricultural, particularly for use in harvesting agricultural crop such as corn. Various implementations relate to methods and devices for measuring plant stalk cross-sectional area during harvest and providing additional methods of predicting and displaying yield on a row-by-row level in real time.

A rigidity measurement apparatus is a rigidity measurement apparatus that measures rigidity of an object to be measured and includes a load estimator, a displacement calculator, and a rigidity calculator. The load estimator estimates a load applied to a measurement point set on the object to be measured by using a captured image of the object to be measured. The displacement calculator calculates a displacement of the measurement point by using the captured image. The rigidity calculator calculates the rigidity of the object to be measured by using the load and the displacement.

A rigidity measurement apparatus is a rigidity measurement apparatus that measures rigidity of an object to be measured and includes a load estimator, a displacement calculator, and a rigidity calculator. The load estimator estimates a load applied to a measurement point set on the object to be measured by using a captured image of the object to be measured. The displacement calculator calculates a displacement of the measurement point by using the captured image. The rigidity calculator calculates the rigidity of the object to be measured by using the load and the displacement.

A feed sensor detects location of a wood log to be moved with a feed mechanism in relation to a predetermined point in a device. A control circuit controls a feed mechanism to feed the log for a preset length on the basis of the location of the log detected by the feed sensor. The control circuit controls the cutting mechanism to cut a wood block from a log longer than the predetermined length when the feed mechanism has fed the log for the preset length and a splitting mechanism to split the wood block cut from the log.

A dustproof counter device of a measuring wheel has a base, a counter, and a pedal setting component. The base has a component opening formed through a top of the base and a dustproof flange protruding from the base and surrounding the component opening. The counter is disposed in the base and has a zeroing button extending into the component opening of the base. The pedal setting component has a dustproof cap covering and surrounding the dustproof flange of the base, and abutting against the zeroing button. When the pedal setting component is pressed by a user's foot, dust is kept from dropping into the base by the dustproof cap.

The prism coupling methods disclosed herein are directed to determining a stress characteristic of an original IOX article having a buried IOX region with a buried refractive index profile that is problematic in the sense that it prevents the original IOX article from being measured using a prism coupler system. The methods include modifying the buried IOX region of the original IOX article in a surface portion of the buried IOX region to form a modified IOX article having an unburied refractive index profile that allows the modified IOX article to be measured using a prism coupler. The methods also include measuring a mode spectrum of the modified IOX article using the prism coupler system. The methods further include determining one or more stress characteristic of the original IOX article from the mode spectrum of the modified IOX article.

A reel assembly includes a housing, an axle within the housing, a reel within the housing, a first spring and a second spring. The housing has a fixed connection portion. The fixed connection portion is fixed from rotation relative to the housing. The axle is configured to rotate about an axis of rotation. The reel is configured to rotate about the axis of rotation and the axle. The first spring is coupled between the axle and the fixed connection portion of the housing. The second spring is coupled between the axle and the reel. The second spring has a torque profile associated therewith different from a torque profile of the first spring. Rotation of the reel relative to the housing in a direction tending to tension the second spring transmits rotational movement to the axle through the tensioning of the second spring. Such rotational movement of the axle is applied to the first spring to tension the first spring.

The present disclosure relates to a three-dimensional shape measurement apparatus for obtaining height information of a measurement target object using a prism. The three-dimensional shape measurement apparatus includes an illumination unit irradiating light on the measurement target object, a prism unit receiving reflective light reflected from the measurement target object and directing the reflective light to an image formation lens, an imaging unit receiving the reflective light from the prism unit and capturing an image of the reflective light, and a height measurement unit measuring a height of the measurement target object based on the image captured by the imaging unit.