Abstract: A measuring tool includes a tool body and a first measuring unit. The first measuring unit includes a first probe, a first measuring meter, and a first zero button. The first probe is used for contacting a standard part or a test part inside the tool body. The first measuring meter is connected to the first probe for displaying a first zero value or a first measure value. The first zero button is used for zeroing the first measuring meter to display the first zero value when the first probe contacts the standard part. When the first probe contacts the test part after the first measuring meter is zeroed, the first measuring meter displays the first measure value. A first dimension difference value of the test part and the standard part is equal to a difference value of the first measure value and the first zero value.

Abstract: Provided is a test device for checking whether the position of a first circular through hole defined in a workpiece meets a tolerance requirement. The test device includes a base, a positioning block, a test pin, a floating support block, and a standard design part. The positioning block is mounted on the base and positions the workpiece. The test pin includes a cylindrical rod capped with a conical part. The floating support block is coupled to the base and supports the test pin. A central axis of the test pin is coincident with a central axis of the first circular through hole. The standard design part is mounted on the base and defines a second circular through hole. If the cylindrical rod can insert into the second circular through hole, the positioning of the first circular through hole meets the tolerance requirement.

Abstract: An apparatus for measuring an inside diameter of hole of a workpeice comprises a main body, two probing legs, two pressure sensors, a controller unit, a display unit, and a step-motor. The two probing legs have a first end and a two second end. Two pressure sensors are respectively mounted on the second end and configured from generating a pressure signal in response to a reacting force applied thereon by an inner wall in the hole. The step-motor is configured for driving the two probing legs to rotate so as to enable the pressure sensors to about against the inner wall. The controller unit is configured for controlling the step driving the probing legs to rotate in response to the pressure signal and computing a rotation angle of each probing leg. The display unit is configured for display the inside diameter of a the hole.

Abstract: Methods and systems for a portable metrology device are described. One embodiment of the present invention is an apparatus including a first link, a first probe coupled with the first link by a first coupling operable to move in a first degree of freedom, a second probe coupled with the first link by a second coupling operable to move in a second degree of freedom, a first sensor operable to output a first sensor signal associated with a motion of the first coupling, and a second sensor operable to output a second sensor signal associated with a motion of the second coupling. The embodiment also includes a processor in communication with the first and second sensors and operable to: receive the first sensor signal and the second sensor signal, and determine a distance between the first probe and the second probe based at least in part on the first sensor signal and the second sensor signal.

Abstract: A brow tool comprises a first extending arm. The first extending arm has a first gear at a base portion. A first straight edge is defined on an inside portion of the first extending arm. The first straight edge is offset in a latitudinal direction in the amount of one half of a gap distance, to provide a latitudinal offset. A second extending arm has a second gear at a base portion. A second straight edge is defined on an inside portion of the second extending arm. The second straight edge is offset in a latitudinal direction to provide a latitudinal offset in the amount of one half of a gap distance. A housing connects the first gear to the second gear so that the first gear is in meshed configuration with the second gear.

Abstract: Methods and systems for a portable metrology device are described. One embodiment of the present invention is an apparatus including a first link, a first probe coupled with the first link by a first coupling operable to move in a first degree of freedom, a second probe coupled with the first link by a second coupling operable to move in a second degree of freedom, a first sensor operable to output a first sensor signal associated with a motion of the first coupling, and a second sensor operable to output a second sensor signal associated with a motion of the second coupling. The embodiment also includes a processor in communication with the first and second sensors and operable to: receive the first sensor signal and the second sensor signal, and determine a distance between the first probe and the second probe based at least in part on the first sensor signal and the second sensor signal.

Abstract: A measuring apparatus is provided for measuring a diameter of a hole. The measuring apparatus includes a sensor unit, a data processing unit, and a display unit. The sensor unit includes a probing member. The probing member includes a plurality of probes with contact ends being arranged on a circumference, and a plurality of angle sensors. The probes are capable of contacting the inner surface of the hole. The angle sensors are arranged on each of the probes to obtain digitally an angle value of each splaying probe contacting the inner surface of the hole. The data processing unit is configured for receiving the angle value generated by the sensor unit and computing the diameter of the hole according to the value of an angle. The display unit is configured for displaying the diameter computed by the data processing unit. A method is also provided for using the measuring apparatus.

Abstract: A surface texture measuring instrument includes: a movement-estimating unit for estimating a movement condition of a drive mechanism based on a scanning vector command issued by a scanning vector commander to calculate an estimated operation state quantity; and a correction-calculating unit for correcting a detection value of a drive sensor in accordance with the estimated operation state quantity calculated by the movement-estimating unit. The movement-estimating unit includes: a nominal-model setting unit in which a nominal model representing signal transfer function of the scanning vector command from the issuance of the scanning vector command to a reflection on a movement position of the scanning probe is stored.

Abstract: A collision detection sensor for a waterjet system provides a signal in the event the device approaches to within a selected distance of an obstruction in the plane of the working surface. An annular pressure switch lying in a first plane provides the signal when radial pressure is applied to a perimeter of the pressure switch via an annular trigger skirt, the trigger skirt applying the radial pressure in response to a collision of the device with an obstacle.

Abstract: A measurement probe 1 for measuring a surface of sample S comprises a base section 10, a head section 30 having a probe tip 31, and a support structure section 15 which supports the head section 30 with the base section 10 along a support axis substantially orthogonal to the vertical axis in the direction of protrusion of the probe tip 31. The support structure section 15 includes two spring structure sections of a first spring structure section 20 deformable in the direction of the vertical axis; and a second spring structure section 25 deformable in the direction of the lateral axis, and a reflection surface 32 which is formed with a reflection pattern varying the reflectance within the surface is provided at the side opposite to the probe tip 31 of the head section 30.

Abstract: The invention is directed to a gauge assembly that is used to measure parameters of camshaft journals or other objects with cylindrical surfaces. The gauge assembly includes two gauges, the first is an air snap gauge and the second a linear variable differential transducer. The air snap gauge is slidingly attached to the base and the second gauge is attached to a base as well. Air resistance measurements, taken through the air snap gauge provide a measure of diameter of the journal while relative linear motion between the base and air snap gauge, measured by the second gauge, provides a measure of journal runout relative to the center axis of the camshaft. Control logic is used to calculate other parameters such as runout of a journal relative to another journal on a common camshaft.

Abstract: Components of a measuring tool such as a main beam (11) and a slider (12) of a caliper gauge (1) are formed by a synthetic resin containing carbon nanofiber and an electro-conductive electrode (15) is formed on the surface of the main beam (11) at a predetermined pitch, so that a production process can be simplified, rigidity of the components can be enhanced, linear expansion coefficient can be reduced, and anti-frictional properties can be improved, thus enhancing durability while improving measurement accuracy.

Abstract: An illuminated caliper device includes a caliper assembly having first and second caliper legs each having a pointed tip and a pivot end. A pivot support and first and second pivot elements pivotally connects the pivot ends of the first and second caliper legs to the pivot support. A battery housing attached to the pivot support contains a battery. First and second light emitting diodes are coupled by a switch mounted on the battery housing to first and second terminals of the battery and produced light that is directed to areas of the surface to be measured by pointed tips of the legs. The intensity and color of light emitted by the first light emitting diode are such as to sufficiently illuminate the surface under low ambient illumination conditions without disrupting acquired night vision of a user.

Abstract: Touch-triggered probe comprising a fixed part, designed to be fastened onto a measuring machine or a machine tool, and a mobile contact feeler that can be oriented on two independent axes along a multiplicity of spatial directions. The two axes of the probe comprise each an actuator for unlocking and adjusting the axes.

Abstract: Described is a writing instrument-caliper system composed of a fully functional writing instrument and a separate caliper device. The writing instrument and caliper device are of such construction that the caliper device can be inserted snugly into the open-ended hollow barrel of the writing instrument for safe storage. With the caliper device in its storage location, the writing instrument-caliper system is of similar outer physical dimensions to the writing instrument alone, and can be carried safely in a shirt pocket without risk of injury to the user or it can be employed as a fully functional writing instrument. With the caliper device removed from its storage location, the writing instrument and caliper device can be employed in parallel, allowing the user to make written notations while simultaneously making measurements with the caliper device. This writing instrument-caliper system overcomes many of the problems encountered by prior art devices.

Abstract: An apparatus for measuring distances on a surface according to a designated scale includes: (a) a distance indicating unit for indicating distance between a first locus and a second locus on the surface; (b) a calibration unit coupled with the distance indicating unit for effecting calibration of the apparatus to the designated scale; (c) a control unit for controlling at least the calibration; the control unit being coupled with at least the calibration unit; and (d) a display unit for displaying information relating at least to the calibration and the distance; the display unit being coupled at least with the control unit. At least the control unit, the distance indicating unit and the display unit cooperate to indicate the distance according to the designated scale after the calibration.

Abstract: Described is a writing instrument-caliper system composed of a fully functional writing instrument and a separate caliper device. The writing instrument and caliper device are of such construction that the caliper device can be inserted snugly into the open-ended hollow barrel of the writing instrument for safe storage. With the caliper device in its storage location, the writing instrument-caliper system is of similar outer physical dimensions to the writing instrument alone, and can be carried safely in a shirt pocket without risk of injury to the user or it can be employed as a fully functional writing instrument. With the caliper device removed from its storage location, the writing instrument and caliper device can be employed in parallel, allowing the user to make written notations while simultaneously making measurements with the caliper device. This writing instrument-caliper system overcomes many of the problems encountered by prior art devices.

Abstract: An illuminated caliper device includes a caliper assembly having first and second caliper legs each having a pointed tip and a pivot end. A pivot support and first and second pivot elements pivotally connects the pivot ends of the first and second caliper legs to the pivot support. A battery housing attached to the pivot support contains a battery. First and second light emitting diodes are coupled by a switch mounted on the battery housing to first and second terminals of the battery and produced light that is directed to areas of the surface to be measured by pointed tips of the legs. The intensity and color of light emitted by the first light emitting diode are such as to sufficiently illuminate the surface under low ambient illumination conditions without disrupting acquired night vision of a user.

Abstract: A measurement device having a pair of legs. Each leg has a measurement point and a fulcrum end, the fulcrum ends providing a pivot point for the legs so that the measurement points arcuately move apart from one another. The measurement device has a transducer assembly connected to at least one of the legs which measures leg displacement and generates a distance signal. The measurement device has a programmable processing unit adapted to process the distance signal and display a distance measurement on an electronic display.

Abstract: An improved frame height gauge for race cars includes a substantially hollow housing having an open top end. A spring urges a stop member pivotally mounted within the housing to an extended position in which the stop member projects through the top opening. In use, an individual slides the gauge beneath a frame portion of a race car at a location to be measured, causing the stop member to contact a portion of the race car frame, depressing the stop member against the bias of the spring into the housing to a depressed position in which the distance from a bottom surface of the housing resting on the ground or a floor to the uppermost extending portion of the stop member corresponds to the car frame height at the particular location.

Abstract: The invention relates to a measuring device comprising two rod elements which can be pivoted about a common axis of rotation and form the sides of an angle and whose angular positions towards each other can be detected electronically. The device also comprises a calculator which in accordance with a set angle calculates the distances along straight or curved lines extending between the points defined by the rod elements, as well as a display unit which displays the set angle or the distances detected. Said measuring device can also be used as electronic calculator.

Abstract: An electronic fat gauge includes a main body and a clamping lever pivotally mounted on the main body. The clamping lever includes a shorter depressing arm and a longer measuring arm extended from a middle pivot portion of the clamping lever in opposite directions. When the shorter depressing arm is depressed, the longer measuring arm is caused to open by a wide angle relative to the main body for conveniently clamping a fatty area of a user's body between the measuring arm and the main body. The open angle of the measuring arm is converted into a signal through a variable resistor connected to the middle pivot portion of the clamping lever, and the signal is further converted by a control circuit into a value of measuring result for showing in a liquid crystal display and viewing by the user.