Pressure transducer compensation system

Details Pressure transducer compensation system Pressure transducer compensation system

1989-08-29

1992-08-04

Howell, Kyle L.

Surgery

Truss

Pad

73400R, 73708, 73766, 128673, 364558, 36457103, A61B 500, G01L 2700

Patent

active

051350025

ABSTRACT:
A pressure transducer compensation system for compensating an offset and adjusting the sensitivity of the pressure transducer to a predetermined level. A reusable cable (160) connected to a pressure monitor (14) is intended for use with a plurality of disposable pressure transducers (12). In one embodiment, a connector (150) of the reusable cable includes a CPU (70), which determines the offset and self-heating errors of the pressure transducer during the first 30 seconds it is energized, stores the corrections in its internal memory and compensates the output signal produced by the pressure transducer for those errors and for variations in ambient temperature. A gain-set resistor (56) is included in a male modular phone plug (202) of a disposable cable that is integrally connected to the pressure transducer, and is used by the compensation circuit to control the signal produced by the pressure transducer, compensating for the characteristic sensitivity of the device. In a second embodiment, the disposable cable includes an offset resistor (250), and the compensation system uses a charge balance modulator 9260) to produce a pulse width modulated signal that is compensated for both the offset and characteristic sensitivity of the pressure transducer.

REFERENCES:
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patent: 4550611 (1985-11-01), Czarnocki
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patent: 4685469 (1987-08-01), Keller
patent: 4817022 (1989-03-01), Jornod et al.
patent: 4883992 (1989-11-01), Koglin et al.
patent: 4926674 (1990-05-01), Fossum et al.
patent: 4950235 (1990-08-01), Slate et al.

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