초록 ▼

This electronic scanning pressure system includes a plurality of pressure transducers (60). A means (22) obtains an electrical signal indicative of a pressure measurement from each of the plurality of pressure transducers (60). A multiplexing means (12) is connected for selectively supplying inputs

This electronic scanning pressure system includes a plurality of pressure transducers (60). A means (22) obtains an electrical signal indicative of a pressure measurement from each of the plurality of pressure transducers (60). A multiplexing means (12) is connected for selectively supplying inputs from the plurality of pressure transducers (60) to the signal obtaining means (22). A data bus (10) connects the plurality of pressure transducers (60) to the multiplexing means (12). A latch circuit (16) is connected to supply control inputs to the multiplexing means (12). An address bus (14) is connected to supply an address signal of a selected one of the plurality of pressure transducers (60) to the latch circuit (16). In operation, each of the pressure transducers (60) is successively scanned by the multiplexing means (12) in response to address signals supplied on the address bus (14) to the latch circuit (16). The electronics of this system is desirably incorporated along with the pressure transducers (60) in a package (50), which contains an array of the pressure transducers (60), a sealed reference chamber (140) and a heater (54). This package may in turn be incorporated in a complete system including an A/D converter (302) and a plurality of the packages (50) connected to the A/D converter (302) by cables (300). The A/D converter is connected to a data processor (304) by a cable (306).

대표청구항 ▼

A pressure system comprising a plurality of pressure transducers, means for obtaining an electrical signal indicative of a pressure measurement from each of said plurality of pressure transducers, multiplexing means connected for selectively supplying inputs from said plurality of pressure transduce

A pressure system comprising a plurality of pressure transducers, means for obtaining an electrical signal indicative of a pressure measurement from each of said plurality of pressure transducers, multiplexing means connected for selectively supplying inputs from said plurality of pressure transducers to said signal obtaining means, a data bus connecting said plurality of pressure transducers to said multiplexing means, a latch circuit connected to supply control inputs to said multiplexing means, an address bus connected to supply an address signal of a selected one of said plurality of pressure transducers to said latch circuit, said signal obtaining means comprising a differential amplifier receiving a first signal from one of said pressure transducers as a first input and a second signal from a predetermined one of said pressure transducers constituting a reference transducer as a second input, the differential amplifier producing as an output, based on said first and second signals, the electrical signal indicative of the pressure measurement.