Boots – shoes – and leggings
Patent
1995-08-07
1997-02-25
Voeltz, Emauel T.
Boots, shoes, and leggings
177 50, 177208, 177211, 177254, 73 4R, 73708, G01G 504, G01L 1904
Patent
active
056065167
ABSTRACT:
A pressure transducer module includes a plurality of cavities, each cavity in fluid communication with a hydraulic load cell. Each cavity deforms with variations in the pressure of the hydraulic fluid in the cavity. Sensors generate output signals representative of the deformation of the cavities. The sensor output signals are digitized and multiplexed, whereby the transducer module generates a digital output data stream. The pressure transducer module is pre-calibrated for creep, hysteresis, non-linearity and temperature related errors. A computer controller stores the calibration data for the module. The pressure transducer module also includes a temperature sensor. A weighing system includes a weighing platform or structure; at least one pressure transducer module; and hydraulic transducers for measuring the load applied to the weighing platform or structure. A controller receives the outputs of the sensors and applies the calibration data to calculate the weight of the load on the platform. The transducer module may be used in weighing systems having different load ranges. Also provided is a method and apparatus for pre-calibrating the pressure transducer module, a method and apparatus for pre-calibrating the hydraulic transducers, and a method of performing cornering correction in a weighing system. In an alternative embodiment, the pressure transducer module may include a microprocessor and calibration data memory so as to perform error compensation on the pressure transducer module within the module itself.
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Douglas Alec T.
Keen Harry J.
Fairbanks Scales Inc.
Klein David M.
Smith Demetra R.
Voeltz Emauel T.
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