摘要:
A dimension display device displays the dimension of a machined member to be measured by means of a bar graph. The dimension display device includes a bar graph display part which is composed of a large number of display elements, and a plurality of scale display parts disposed in parallel to the bar graph display part for displaying in a numeric value a scale with respect to the bar graph display part. The plurality of scale display parts are able to shift the numeric value of the scale for display according to different types of members to be measured. That is, if the center value of the tolerance of the member to be measured is set, then the scale display parts shift the numeric value of the scale such that the center value of the tolerance is moved to the center of the bar graph display part, so that the bar graph display part can be used effectively.
摘要:
A length measuring system comprises an elongate scale member adapted to be scanned for generating measured-length signals, a tubular scale member carrier defining an internal cavity housing the scale member and including a mounting wall, a connection of the scale member to the scale member carrier, the connection permitting a longitudinal movement of the scale member relative to the scale member carrier, and end blocks rigidly connected to the scale member carrier at both ends thereof, the end blocks defining recesses and having opposite sides. Devices are provided in the recesses of the end blocks for fastening the scale member carrier to an object and for compensating for length differences resulting from a differential thermal expansion of the scale member carrier and the object, the devices including an intermediate part having two ends and defining a through hole between the ends for receiving a fastening element for fastening the end blocks to the object, and webs having one end connected to the ends of the intermediate part and extending transversely to the longitudinal direction, the webs defining at least along a major portion of their length a clearance with the fastening element and adjacent surfaces of the recess, and an opposite end of the webs connected to the end blocks, the webs having a relatively small flexural stiffness in the longitudinal direction and a relatively high flexural stiffness in a direction extending transversely to the longitudinal direction.
摘要:
A cantilever chip for scanning probe microscope includes a cantilever portion, a probe portion formed at a free end of the cantilever portion, a mirror portion formed on the cantilever portion on a side opposite to a side where the probe portion is formed, and a support portion for supporting the proximal end of the cantilever portion. A step is formed between the cantilever portion and the support portion, so that the support portion is set back from the surface of the cantilever portion on the side where the probe portion is formed.
摘要:
The invention is directed to an optoelectronic probing device for a coordinate measuring apparatus. The probe is exchangeable automatically via a probe changing device. The probing device has a temperature sensor which is in thermal contact with the material of the probing device. The connecting terminals of the sensor are applied to contacts on the exchange face of the probing device. In this way, it is possible to immediately determine the position of the optoelectronic components of the probe from the calibration data obtained at other temperatures after each probe exchange.
摘要:
A sliding gauge for measuring animal carcasses for slaughter, tree trunks, whole cheese or other objects. The sliding gauge includes a rod and a slide mounted for sliding movement on the rod by a form-locking guide arrangement. The rod and the slide are each equipped with a jaw projecting therefrom at a right angle, such that the jaws are parallel. Longitudinal markings and at least one length sensor are included with the rod and slide. A force sensor on one of the jaws may operate to disable further operation of the length sensor such that repeatable measurements may be made of soft or elastic articles. The length sensor is connected to electronic circuit components, which may include a microcomputer, for evaluation and processing of the signals supplied by the length sensor. Replaceable motherboards or memories allow the use of different processing programs for different applications, and the replacement of full memory devices such that the sliding gauge may continue to be used while the previous data is evaluated by a separate computer.
摘要:
To measure the dimensional characteristics of elongated flow channels for nuclear fuel rod assemblies at the manufacturing site, an upender is utilized to swing a flow channel from a horizontal loading orientation to an upright pre-measurement position and then to shift the flow channel laterally into a measurement position where it is engaged and held by reciprocatingly mounted upper and lower endplugs while its dimensional characteristics are acquired by a measurement carrige mounted for vertical scanning movement along the entire flow channel length.
摘要:
A laser based, noncontacting measurement instrument is particularly adapted for the printed circuit board drilling industry to measure drill diameter, runout, and tip position under actual operating conditions. A laser beam is focused in space and the amount of light occluded by the drill bit as the bit is passed through the beam is sensed by a detector. Diameter, runout, and tip position are calculated by measuring the amount of occlusion, monitoring the position and angular orientation of the rotating drill, and correlating the amount of light occlusion to the position and angular orientation of the drill. The instrument automatically compensates for dust and debris in the optical path.
摘要:
Method and apparatus for scaling, sorting, processing, cutting-up and the like of elongate timber items with two substantially parallel, longitudinal surfaces achieved by processing, during longitudinal feed of the item, including determination of a given lateral position and/or form of the item at at least one position along the item, e.g., a cross-section or cross-sectional element, with the aid of sensing means. The method determination takes place with the aid of touch-free distance-sensing means with predetermined measuring directions, fixed and discrete, for determining distances to at least two measuring points on the surface of the timber item, said measuring points being substantially in a cross-section or cross-sectional element of the timber item and on either side of a reference line across the cross-section or cross-sectional element. The sensing takes place in two completely or partially counter-directed measuring directions, which, as seen in the longitudinal direction of the timber item, substantially meet or intersect each other at a point situated on the reference line, where the respective measuring direction, seen in the longitudinal direction of the timber item, forms an angle to the reference line, and/or takes place in at least two measuring directions parallel to the existing processing plane and parallel to the reference line, the distance information thus obtained being utilized for determining a given lateral position and/or shape.
摘要:
A method of mountng a measuring device for measuring the relative positions of two objects, such as, the bed and the carriage of the machine, wherein a graduation of an embodiment of measure is scanned without contact by a scanning device. The embodiment of measure is initially aligned and mounted on the first of two objects. The scanning device is mounted on an auxiliary device and is exactly calibrated relative to the graduation of the embodiment of measure. The scanning device is displaced guided on the embodiment of measure by means of the auxiliary device until a stop surface of the second object is reached. The scanning device is fastened with the intermediate arrangement of an attachment device on the stop surface of the second object in such a way that the calibration of the scanning device relative to the graduation is maintained. The auxiliary device is then loosened and removed from the scanning device.
摘要:
A position measuring device for measuring the relative positions of two objects, wherein the two objects are machine components of a processing or working machine or a measuring machine for tools. The graduation of a scale connected to the first object is scanned by a scanning unit connected to the second object. The scale is arranged on a scale carrier so as to be slightly displaceable in a measuring direction. The scale carrier is connected with both ends thereof to fastening elements which, in turn, are rigidly connected to the first object. When the scale, the scale carrier and the workpiece have different thermal expansion, the scale carrier is connected at least at one end thereof to the fastening element with a translatory degree of freedom in measuring direction. The scale is biased at least at one end thereof by a spring element. The spring element is connected to the translatory movable end of the scale carrier. The spring constant of the spring element is selected so that when temperature changes occur the relative change in length of the scale is equal to the relative change in length of the workpiece.