SCALE INCLINATION CALIBRATION
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Abstract
The present invention provides a weighing apparatus comprising a load cell and an inclinometer and a method of weighing with and calibrating the weighing apparatus that tilt compensates for component parts of load cell readings that vary according to different relationships with load cell inclination. The present invention further provides a weighing apparatus and method of weighing with and calibrating the weighing apparatus that compensates for residual errors in a measured weight that has been pre-compensated for load cell inclination.
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Citations
42 Claims
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1-21. -21. (canceled)
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22. A method of calibrating a weighing apparatus comprising:
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I) a load cell; II) an inclinometer located in a defined position with respect to the load cell; the method comprising the steps of; A) providing a first value associated with a weight of a first mass measured at a first inclination value; B) measuring with the load cell at a second inclination from a horizontal level a second value associated with the weight of the first mass; C) measuring with the inclinometer a second inclination value associated with the load cell at the second inclination; D) modifying the second value associated with the weight of the first mass in accordance with at least a first inclination relationship and the second inclination value; E) calculating an error parameter based at least upon; i) a comparison of the first value associated with the weight of the first mass, and the modified second value; and
,ii) an error relationship between weight and load cell inclination. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of weighing using a weighing apparatus comprising:
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I) a load cell; II) an inclinometer located in a defined position with respect to the load cell; the method comprising the steps of; A) measuring with the load cell a first value corresponding to at least a weight value;
the weight value varying with the inclination of the load cell according to a first inclination relationship;B) measuring with the inclinometer an inclination value associated with an inclination of the load cell; C) modifying the weight value in accordance with the first inclination relationship and the inclination value; D) calculating a second value associated with the weight value, based at least on the modified weight value; E) modifying the second value associated with the weight value, based at least upon an error parameter and the inclination value. - View Dependent Claims (32, 33)
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34. A weighing apparatus comprising
I) a load cell; -
II) an inclinometer located in a defined position with respect to the load cell; III) a storage means storing an error parameter; the weighing apparatus comprising processing means operative to; A) receive a first load cell value corresponding to at least a weight value;
the weight value varying with the inclination of the load cell according to a first inclination relationship;B) receive an inclination value from the inclinometer associated with an inclination of the load cell; C) modify the weight value in accordance with the first inclination relationship and the inclination value; D) calculate a second value associated with the weight value, based at least on the modified weight value; E) modify the second value associated with the weight value, based at least upon an error parameter and the inclination value. - View Dependent Claims (35)
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36. A method of calibrating a weighing apparatus comprising:
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I) a load cell; II) an inclinometer located in a defined position with respect to the load cell; the method comprising the steps of; A) measuring with the load cell in a first position a first value corresponding to at least i) a first weight value and, ii) a first offset value; the first weight value varying with the inclination of the load cell according to a first inclination relationship; B) measuring with the inclinometer a first inclination value associated with the tilt of the load cell at the first position; C) measuring with the load cell in a second position a second value corresponding to at least iii) a second weight value and, iv) a second offset value; the second position at a different inclination than the first position;
the second weight value varying with the inclination of the load cell according to the first inclination relationship;D) measuring with the inclinometer a second inclination value associated with the tilt of the load cell at the second position; E) comparing v) the first value corresponding to at least the first weight value and the first offset value, and, vi) the second value corresponding to at least the second weight value and the first offset value; F) deriving a parameter based upon a second inclination relationship between the offset values and load cell inclination that is different to the first relationship. - View Dependent Claims (37)
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38. A method of weighing using a weighing apparatus comprising:
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I) a load cell; II) an inclinometer located in a defined position with respect to the load cell; the method comprising the steps of; A) measuring with the load cell a first value corresponding to at least; i) a value associated with a weight; and
,ii) an offset value; the weight value varying with the inclination of the load cell according to a first inclination relationship;
the offset value varying with the inclination of the load cell according to a second inclination relationship that is different to the first inclination relationship;B) measuring with the inclinometer an inclination value associated with an inclination of the load cell; C) modifying the weight value in accordance with the first inclination relationship and the inclination value; D) calculating a second value based at least upon the offset value and the modified weight value. - View Dependent Claims (39, 40)
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41. A weighing apparatus comprising
I) a load cell; -
II) an inclinometer located in a defined position with respect to the load cell; III) a storage means storing a parameter; the weighing apparatus comprising processing means operative to; A) receive a first load cell value corresponding to at least a value associated with a weight and an offset value;
the weight value varying with the inclination of the load cell according to a first inclination relationship;
the offset value varying with the inclination of the load cell according to a second inclination relationship that is different to the first inclination relationship;B) receive an inclination value from the inclinometer associated with an inclination of the load cell; C) modify the weight value based on the first inclination relationship and the inclination value; D) calculate a second value based at least on the offset value and the modified weight value. - View Dependent Claims (42)
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Specification