Three-dimensional test objects provide for assessment of a 3D scanner over a range of scales, frequencies, and/or depths. The test objects may include a substrate having a substantially planar top surface and a plurality of surface features. In some examples, the surface features include a plurality of wedges projecting above the plane of the top surface and extending radially outward from an origin to form a three dimensional star pattern. The shape of the surface features may be periodic or non-periodic. In other examples, the depth of the surface features is decoupled from their lateral frequency.

The invention relates to an evaluation tool and method for inspecting the integrity of any physical industry connections (hereinafter fittings). The tool comprises a first component (21) provided with a recess (23) to facilitate its engagement with a fitting to be evaluated (see FIG. 10); and a second component (20) connected to, and moveable relative to, the first component (21). Movement of the second component (20) relative to the first component (21) establishes a measurement between two surfaces (32, 33 in FIG. 10) of a fitting (34) to be evaluated, e.g. between an adjustable ferrule or nut (32) and a fixed part (33) of a fitting (34). The measurement is directly (27, 28), or indirectly, indicative of one or more predetermined connection conditions (e.g. over or under tightening of the adjustable component). The predetermined connection conditions may be read directly from the tool, remotely via an electronic device, or by late cross-referencing against entries in a database.

The invention relates to an evaluation tool and method for inspecting the integrity of any physical industry connections (hereinafter fittings). The tool comprises a first component (21) provided with a recess (23) to facilitate its engagement with a fitting to be evaluated (see FIG. 10); and a second component (20) connected to, and moveable relative to, the first component (21). Movement of the second component (20) relative to the first component (21) establishes a measurement between two surfaces (32, 33 in FIG. 10) of a fitting (34) to be evaluated, e.g. between an adjustable ferrule or nut (32) and a fixed part (33) of a fitting (34). The measurement is directly (27, 28), or indirectly, indicative of one or more predetermined connection conditions (e.g. over or under tightening of the adjustable component). The predetermined connection conditions may be read directly from the tool, remotely via an electronic device, or by late cross-referencing against entries in a database.

A calibration block provides a deck with a slot for receiving a first plate for supporting a distal end of the planter unit when setting its gauge wheels, whereby the first plate is flush with the deck at a predefine distance from the soil. The calibration block also provides a gauge block and associated second plate for increasing the predefined distance.

A calibration block provides a deck with a slot for receiving a first plate for supporting a distal end of the planter unit when setting its gauge wheels, whereby the first plate is flush with the deck at a predefine distance from the soil. The calibration block also provides a gauge block and associated second plate for increasing the predefined distance.

The level correcting gauge block is a tool. The level correcting gauge block incorporates a stepped structure, a level tool, and a target surface. The level tool is a tool used to identify a plane that is perpendicular to the force of gravity (called a horizontal plane). The level tool is used to determine whether the target surface is parallel (or “level”) to a plane that is perpendicular to the force of gravity. The stepped structure works in conjunction with the level tool. The stepped structure measures the elevation change required to be made to the target surface to bring the target surface to level.

The level correcting gauge block is a tool. The level correcting gauge block incorporates a stepped structure, a level tool, and a target surface. The level tool is a tool used to identify a plane that is perpendicular to the force of gravity (called a horizontal plane). The level tool is used to determine whether the target surface is parallel (or “level”) to a plane that is perpendicular to the force of gravity. The stepped structure works in conjunction with the level tool. The stepped structure measures the elevation change required to be made to the target surface to bring the target surface to level.

An adjustable gauge block that may be quickly adjusted to a desired height and then dialed in to a precision measurement that can replace a set of gauge blocks. The adjustable gauge block of the present disclosure may be further used as a repeatable and precise physical reference to set tool depths and heights. The adjustable gauge block of the present disclosure may be utilized as a physical reference to set drill press bit depths, table saw blade heights, router table bit heights, and the like. Additionally, the adjustable gauge block of the present disclosure may be utilized to check uniformity of thickness along an edge of a piece of stock.

An optical calibration system including a calibration module, a light source, an optical sensing device and a calculation module is provided. The calibration module includes a calibration plane and a plurality of calibration structures between the calibration plane and the light source, wherein the calibration structures are disposed at predetermined calibration positions. The light source projects a linear light section toward the calibration module. The optical sensing device senses reflected light from the calibration plane and the calibration structures reflecting the linear light section to generate a sensed frame. The calculation module calculates positions of gravity centers of a plurality of calibration points in the sensed frame corresponding to the calibration structures.

An adjustable gauge block that may be quickly adjusted to a desired height and then dialed in to a precision measurement that can replace a set of gauge blocks. The adjustable gauge block of the present disclosure may be further used as a repeatable and precise physical reference to set tool depths and heights. The adjustable gauge block of the present disclosure may be utilized as a physical reference to set drill press bit depths, table saw blade heights, router table bit heights, and the like. Additionally, the adjustable gauge block of the present disclosure may be utilized to check uniformity of thickness along an edge of a piece of stock.