Geometrical instruments – Distance measuring – Opposed contacts
Patent
1988-10-19
1991-07-09
Haroian, Harry N.
Geometrical instruments
Distance measuring
Opposed contacts
33810, G01B 320, G01B 2102
Patent
active
050294024
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a sliding gauge comprising a rod and a slide arranged on the said rod for being displaced in the longitudinal direction, by means of form-locking guiding means, said rod and slide being equipped each with one jaw projecting at a right angle therefrom and extending in parallel to each other, the said rod and slide comprising between them at least one longitudinal marking interacting with at least one length sensor and the at least one length sensor being connected to electronic circuit components arranged on the slide for evaluating signals received from the sensor.
A sliding gauge of this type has been known from U.S. Pat. No. 4 226 024.
Further, the present invention relates to applications of the before-mentioned sliding gauge for measuring animals for slaughter, trunks and whole cheese.
Sliding gauges are measuring instruments similar to slide calipers and are intended for measuring the outer dimensions of relatively large objects, for example for measuring animals for slaughter, determining the diameter of trunks or whole cheese, and the like.
Accordingly, sliding gauges are in use, for example, in slaughter houses for measuring out, for example, pig halves at characteristic points with respect to the relationship between fat and muscle tissue in order to determine certain classification parameters, for example muscle substance percentages, commercial grades, or prices.
In forestry operations sliding gauges are used for carrying out series measurements in forests in order to determine the volume of mature wood in a given forest area. In this case, one makes use of the fact that when the particular species of tree and the location of the tree is known, measurements of the trunk diameter carried out at a given height permit very exact conclusions to be drawn regarding the height of the tree so that no separate measurements of the height are required within certain acceptable tolerance limits. To say it in other words, it is possible to determine the useful wood volume of a tree with sufficient accuracy by a single measurement carried out at a standardized measuring point of the tree. In addition, sliding gauges are used in forestry operations for determining the volume of cut wood in a relatively simple manner, for example if the tree has been cut to standardized lengths. By combining the values so measured with pre-determined prices it is, therefore, also possible in such cases to determine for example the price of a given wood volume.
Finally, sliding gauges of a simple type have been used also for measuring out whole cheese and, in particular, for determining its volume.
In the case of the sliding gauge according to U.S. Pat. No. 4 226 024, an electronic evaluation unit is arranged on the slide for evaluating electronically the measuring result, i.e. the longitudinal distance between the jaws which are in contact with the object to be measured. To this end, markings are provided on the broad side of the rod, in the longitudinal direction. These markings consist of non-continuous magnetic inserts which are arranged in grooves and which coact with an element which responds to magnetic fields, namely a magnetoresistive element, arranged on the slide. Viewed in the longitudinal direction, two magnetoresistive elements are arranged at a longitudinal spacing corresponding to a multiple of the division of the longitudinal graduation, plus or minus one fourth of the division, in order to enable the sense of displacement of the slide to be derived from the phase relationship of the two measuring signals produced by the magnetoresistive elements.
The slide of the known sliding gauge is provided only with an indication unit and a storage for the measured values. For further processing of these data, in particular for combining them with predetermined other parameters, in forestry applications, for example, with data regarding the particular type of the wood, the price related to the volume, etc., a separate portable data terminal is provided which may in turn be connected to a la
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Kessler Jurg
Lazecki Rene
Thony Christian E.
Wossner Albrecht
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