System and method for setting measurement force thresholds in a force sensing caliper

摘要

An electrically powered caliper is provided which includes a scale member, a slider, a displacement sensor, a force sensing arrangement and a signal processing portion. The signal processing portion is configured to receive a force signal and indicate a respective force corresponding to the respective position of the slider. Force data is acquired comprising a plurality of respective forces corresponding to respective positions of the slider. The signal processing portion defines an acceptable measurement force range defined by at least a minimum force threshold that is determined such that it exceeds a compensation force corresponding to at least one force component included in the force signal that is independent of user variations of the measurement force. It may analyze acquired force data to identify pre-contact data, and set the minimum force threshold for a current measurement procedure based on that pre-contact data.

主权项

1. An electrically powered caliper, comprising:
a scale member including a first measuring surface to be located against a workpiece during a measurement; a slider including a second measuring surface to be located against a workpiece during a measurement; a displacement sensor configured to provide a position signal responsive to changes in a position of the slider along the scale member; a force sensing arrangement located on the slider and configured to provide a force signal responsive to changes in a measurement force exerted on a workpiece by a user through at least one of the first and second measuring surfaces during a measurement procedure; a signal processing portion configured to receive the position signal and indicate a respective position of the slider along the scale member, the signal processing portion including at least a first operating mode wherein it is configured to:
receive a force signal and determine a respective force corresponding to the respective position of the slider;acquire force data comprising a plurality of respective forces and corresponding respective positions of the slider; anddefine an acceptable measurement force range defined by at least a minimum force threshold that is determined such that it exceeds a compensation force corresponding to at least one force component included in the force signal that is independent of user variations of the measurement force.