An automatic measuring device includes a micrometer including a spindle that moves forward and backward to be brought into contact with or away from a workpiece and a displacement detector unit that detects displacement of the spindle, and an automatic operation unit that automates the forward and backward movement of the spindle by power. The automatic operation unit performs a first forward-movement step of moving the spindle forward to bring the spindle into contact with the workpiece, and a contact determination step of determining the contact between the spindle and the workpiece in the first forward-movement step. In the contact determination step, the spindle is determined to be in contact with the workpiece when a change in a position of the spindle detected by the displacement detector unit in the first forward-movement step becomes equal to or less than a predetermined contact determination threshold.

An automatic measuring device includes a micrometer including a spindle that moves forward and backward to be brought into contact with or away from a workpiece and a displacement detector unit that detects displacement of the spindle, and an automatic operation unit that automates the forward and backward movement of the spindle by power. The automatic operation unit performs a first forward-movement step of moving the spindle forward to bring the spindle into contact with the workpiece, and a contact determination step of determining the contact between the spindle and the workpiece in the first forward-movement step. In the contact determination step, the spindle is determined to be in contact with the workpiece when a change in a position of the spindle detected by the displacement detector unit in the first forward-movement step becomes equal to or less than a predetermined contact determination threshold.

A method of calibrating a bore gauge comprises inserting two or more radially extendable elements of a bore gauge into a selected calibrated setting bore or groove in a setting plate comprising a plurality of calibrated setting bores or grooves, each calibrated setting bore or groove of the plurality having a different calibrated nominal diameter. A micrometer of the bore gauge is adjusted so as to cause a measured diameter of the selected calibrated setting bore or groove to match a specified nominal diameter of the selected calibrated setting bore or groove. A setting plate for calibrating a bore gauge includes a plurality of calibrated setting bores or grooves, each calibrated setting bore or groove of the plurality having a different calibrated nominal diameter.

A micrometer head displacement system includes a micrometer head and an imaging portion. The micrometer head includes a coarse scale and a fine scale. The system is configured to: acquire at least one image of the micrometer head from the imaging portion; determine a coarse measurement based at least in part on the at least one image wherein the coarse measurement corresponds to a coarse relative position between the coarse scale and a coarse fiducial line; determine a fine measurement based at least in part on the at least one image and based on calculating an interpolated position of the a fiducial line wherein the fine measurement corresponds to a fine relative position between the fine scale and the fine fiducial line; and determine a micrometer head displacement based at least in part on summing the coarse measurement with the fine measurement.

A micrometer head displacement system includes a micrometer head and an imaging portion. The micrometer head includes a coarse scale and a fine scale. The system is configured to: acquire at least one image of the micrometer head from the imaging portion; determine a coarse measurement based at least in part on the at least one image wherein the coarse measurement corresponds to a coarse relative position between the coarse scale and a coarse fiducial line; determine a fine measurement based at least in part on the at least one image and based on calculating an interpolated position of the a fiducial line wherein the fine measurement corresponds to a fine relative position between the fine scale and the fine fiducial line; and determine a micrometer head displacement based at least in part on summing the coarse measurement with the fine measurement.

There is provided a method for controlling a small-sized adjustable measuring force measurement device capable of appropriately setting the origin.

A central control unit changes an operation mode to an origin setting mode in response to predetermined mode changing operation. The central control unit sets a counter value of an encoder to zero as an origin when a measuring force detecting means detects that a movable member is brought into contact with an object to be measured at a predetermined pressure in the origin setting mode.

There is provided a method for controlling a small-sized adjustable measuring force measurement device capable of appropriately setting the origin.

A central control unit changes an operation mode to an origin setting mode in response to predetermined mode changing operation. The central control unit sets a counter value of an encoder to zero as an origin when a measuring force detecting means detects that a movable member is brought into contact with an object to be measured at a predetermined pressure in the origin setting mode.

An external device is configured to be detachably attached to a measuring instrument via a connector. The external device includes a connector part, an external device body part and a movable connection part. The connector part has a connection terminal. The external device body part has a display part on a side surface of the external device body part. The movable connection part is configured to connect the connector part with the external device body part. The movable connection part is a biaxial rotation hinge having two pivot axes which are in a twisted position relationship with respect to each other.

An external device is configured to be detachably attached to a measuring instrument via a connector. The external device includes a connector part, an external device body part and a movable connection part. The connector part has a connection terminal. The external device body part has a display part on a side surface of the external device body part. The movable connection part is configured to connect the connector part with the external device body part. The movable connection part is a biaxial rotation hinge having two pivot axes which are in a twisted position relationship with respect to each other.

A deformation detection apparatus includes a cell movement-control assembly to handle a linear motion and a rotational motion of a battery cell, a body that supports the cell movement-control assembly, a digital micrometer, and control circuitry. The control circuitry controls a displacement of the battery cell between a first position and a second position along a longitudinal axis through a scanning region of the digital micrometer and a plurality of rotational positions of the battery cell at a plurality of charge states and a plurality of discharge states. The control circuitry measures a plurality of outer diameter values of the battery cell for a plurality of linear positions and a plurality of rotational positions along the longitudinal axis of the battery cell and determines a change in a geometrical shape (deformation and/or strain) of the battery cell for the plurality of linear positions and the plurality of rotational positions.