Fluidic characteristic sensor

Claim 2

A fluidic characteristic sensing system, comprising: a. a first means responsive to change in a selected characteristic in a predetermined region to generate pulsating fluid pressure signals with a frequency which is a function of the selected characteristic; b. a second means connected with said first means, said second means having a pair of resonant transmission lines and a pair of beam diodes which receive such signals, shift the frequency phase, and convert the pulsating signals to a modulated pressure amplitude; c. a third means connected with said second means to receive the phase shifted amplitude modulated signals and rectify the same to produce fluid pressure signals of substantially uniform force; and d. a fourth means connected with said third means to receive signals issuing therefrom and amplify the same to secure desired sensitivity.

Claim 3

The fluidic characteristic sensing system of claim 1 in which filter means are connected with said beam diodes to receive the output therefrom and reduce the pulsations by converting the signals to the mean level of the pulsating pressures.

Claim 4

The fluidic characteristic sensing system of claim 2 in which beam amplifier means is connected with said filter means to receive and utilize the output therefrom to control the beam to produce output signals having a predetermined differential.

Claim 5

The fluidic characteristic sensing system of claim 1 in which each diode has means forming a chamber with an output port, an inlet at the opposite side of said chamber communicating with a source of fluid pressure and directing a jet beam toward said output port, a control port at each side of said inlet for directing a control jet against the side of said jet beam to deflect the same away from said output port, and said transmission lines are of contrasting length and lead from the first means to certain of the control ports of said diodes, and a transmission line with a variable restriction leads from the first means to the other control ports of said diodes.

Claim 6

The fluidic characteristic sensing system of claim 4 in which the third means comprises a separate filter element communicating with each output port of said diodes.

Claim 7

The fluidic characteristic sensing system of claim 5 in which a variable restriction is disposed between one of said diodes and the filter communicating therewith.

Claim 8

The fluidic characteristic sensing system of claim 5 in which each filter element comprises a passage with a plurality of resonant cavities of different capacities communicating therewith at spaced points.

Claim 9

A fluidic characteristic sensing system, comprising: a. a beam-type fluid amplifier having means forming a chamber with a pair of output ports at one side, an inlet at the opposite side communicating with a source of fluid pressure and directing a jet beam toward the output ports, and a control port at each side of said inlet for directing a control jet against the side of said jet beam to deflect it toward alternate output ports; b. a fluid passage connecting said control ports and exposed to a localized region in which a selected characteristic is to be sensed; c. a pair of diodes each with means forming a chamber with an output port, an inlet at the opposite side of said chamber communicating with a source of fluid pressure and direCting a jet beam toward said output port, a control port at each side of said inlet for directing a control jet against the side of said jet beam to deflect the same away from said output port, predetermined control ports being connected with a certain output said amplifier by resonant transmission lines and the other control ports being connected with the remaining output port of the amplifier of said first means by a passage containing a variable restriction; d. a separate filter element communicating with the output port of each diode, each of said filter elements having a passage with a plurality of resonant cavities of different capacities communicating therewith at spaced points; and e. a fluid amplifier of the type having means forming a chamber with spaced output ports at one side and an inlet at the opposite side communicating with a source of fluid pressure and directing a jet beam toward said output ports, a control port at either side of said inlet for directing a control jet stream against the side of said jet beam to deflect it relative to said output ports, each control port communicating with the outlet of a different filter element, said amplifier serving to produce output signals with desired sensitivities.

Claim 10

A fluidic characteristic sensing system, comprising: a. a beam-type fluid amplifier having means forming a chamber with a pair of output ports at one side, an inlet at the opposite side communicating with a source of fluid pressure and directing a jet beam toward the output ports, and a control port at each side of said inlet for directing a control jet against the side of said jet beam to deflect it toward alternate output ports; b. a fluid passage connecting said control ports and exposed to a localized region in which a selected characteristic is to be sensed; c. a pair of diodes each with means forming a chamber with an output port, an inlet at the opposite side of said chamber communicating with a source of fluid pressure and direCting a jet beam toward said output port, a control port at each side of said inlet for directing a control jet against the side of said jet beam to deflect the same away from said output port, predetermined control ports being connected with a certain output said amplifier by resonant transmission lines and the other control ports being connected with the remaining output port of the amplifier of said first means by a passage containing a variable restriction; d. a separate filter element communicating with the output port of each diode, each of said filter elements having a passage with a plurality of resonant cavities of different capacities communicating therewith at spaced points; and e. a fluid amplifier of the type having means forming a chamber with spaced output ports at one side and an inlet at the opposite side communicating with a source of fluid pressure and directing a jet beam toward said output ports, a control port at either side of said inlet for directing a control jet stream against the side of said jet beam to deflect it relative to said output ports, each control port communicating with the outlet of a different filter element, said amplifier serving to produce output signals with desired sensitivities.