GB1268453A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1268453A – Improvements in fluidic temperature sensor system
– Google Patents

GB1268453A – Improvements in fluidic temperature sensor system
– Google Patents
Improvements in fluidic temperature sensor system

Info

Publication number
GB1268453A

GB1268453A
GB46911/69A
GB4691169A
GB1268453A
GB 1268453 A
GB1268453 A
GB 1268453A
GB 46911/69 A
GB46911/69 A
GB 46911/69A
GB 4691169 A
GB4691169 A
GB 4691169A
GB 1268453 A
GB1268453 A
GB 1268453A
Authority
GB
United Kingdom
Prior art keywords
amplifier
phase shift
oscillator
tube
low
Prior art date
1968-10-17
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB46911/69A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

General Electric Co

Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1968-10-17
Filing date
1969-09-24
Publication date
1972-03-29

1969-09-24
Application filed by General Electric Co
filed
Critical
General Electric Co

1972-03-29
Publication of GB1268453A
publication
Critical
patent/GB1268453A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

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Classifications

F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL

F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES

F15C1/00—Circuit elements having no moving parts

F15C1/005—Circuit elements having no moving parts for measurement techniques, e.g. measuring from a distance; for detection devices, e.g. for presence detection; for sorting measured properties (testing); for gyrometers; for analysis; for chromatography

G—PHYSICS

G01—MEASURING; TESTING

G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00

G01K11/22—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using measurement of acoustic effects

Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]

Y10T137/2065—Responsive to condition external of system

Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC

Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T137/00—Fluid handling

Y10T137/206—Flow affected by fluid contact, energy field or coanda effect [e.g., pure fluid device or system]

Y10T137/212—System comprising plural fluidic devices or stages

Y10T137/2125—Plural power inputs [e.g., parallel inputs]

Y10T137/2142—With variable or selectable source of control-input signal

Abstract

1,268,453. Acoustic thermometer. GENERAL ELECTRIC CO. 24 Sept., 1969 [17 Oct., 1968], No. 46911/69. Heading H4D. In a system for sensing the temperature T of a region by detecting the phase shift # of a fluid pressure wave signal in being transmitted through a sensor tube disposed in a medium in the region, fluidic devices are used for the signal generation and phase shift detection and the fluid in the tube is isolated from the medium to avoid contamination by the medium. In the Fig. 1 embodiment fluidic oscillator 15 and amplifier 16 superimpose an oscillatory component on the steady pressure provided by source 12 for the fluid (e.g. air or water) in sensor tube 10. Tube 11 acts as a pre-heater for the fluid. The single-ended pressure signal at the output 18 of tube 10 is converted to a pushpull signal at the output of amplifier 22 by passing it to the control jets of amplifier 22 via resistance 25 and a low-pass filter (resistance 26 plus capacitance 27) respectively. The phase shift detector, 17, comprises rectifiers 20, 21 each receiving at its control jets the input pressure signal of tube 10 and the push-pull signal from one receiver of amplifier 22. Low-pass filters 23, 24 smooth the rectifier outputs to give a differential output pressure #P o dependent on the phase shift. The rectifiers are such that #P o has a null for # = n#/2 (n = 1, 3, 5 …) and the sensor tube length and oscillator frequency are selected such that there is a null at some reference temperature, i.e. their selection determines n. #P o then represents the deviation of T from the reference temperature. By selecting a high value of n, the apparatus sensitivity d#/dT is increased, but at the expense of useful temperature range (since # must be less than 180 degrees to avoid ambiguity). To overcome this a dual-mode system, Fig. 7, is arranged to operate normally at high-n but to switch to low-n operation if the temperature deviation exceeds a predetermined limit. The high-n operation is provided by oscillator 15b and phase shift detector 17b, the low-n operation by oscillator 15a and phase shift detector 17a. Amplifier 70 or 74 is enabled to pass an output to summing amplifier 73 according to the state of a switch 76 which compares detector 17a output with a threshold set by a pressure P B and switches on amplifier 70 only when the threshold is exceeded, i.e. when there is a large temperature deviation. In alternative dual-mode systems (a) the low-n mode is provided by a Helmholtz oscillator whose frequency is a function of the sensed temperature and this frequency is compared with a fixed high-n mode frequency to determine if the temperature deviation exceeds the predetermined limit (Fig. 8, not shown) or (b) a single oscillator is used to excite two sensor tubes of different length (not shown).

GB46911/69A
1968-10-17
1969-09-24
Improvements in fluidic temperature sensor system

Expired

GB1268453A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US76842368A

1968-10-17
1968-10-17

Publications (1)

Publication Number
Publication Date

GB1268453A
true

GB1268453A
(en)

1972-03-29

Family
ID=25082464
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB46911/69A
Expired

GB1268453A
(en)

1968-10-17
1969-09-24
Improvements in fluidic temperature sensor system

Country Status (5)

Country
Link

US
(1)

US3566689A
(en)

CH
(1)

CH507512A
(en)

DE
(1)

DE1950225A1
(en)

FR
(1)

FR2020947A1
(en)

GB
(1)

GB1268453A
(en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3631874A
(en)

1970-03-06
1972-01-04
Gen Electric
Fluidic overspeed sensor for a power turbine

US4005602A
(en)

1974-08-01
1977-02-01
Wilkie Wallace J
Apparatus for measuring high altitude temperatures

US4196626A
(en)

1978-11-27
1980-04-08
The United States Of America As Represented By The Secretary Of The Army
Flueric notch filter temperature or density sensor

US4258754A
(en)

1979-01-15
1981-03-31
Pickett Charles G
Method and apparatus for fluid sound amplification and detection of low frequency signals

US4265116A
(en)

1979-10-01
1981-05-05
The Garrett Corporation
Fluidic temperature sensor

US4523611A
(en)

1983-05-06
1985-06-18
The United States Of America As Represented By The Secretary Of The Army
Fluidic absolute-to-differential pressure converter

US9989423B2
(en)

2015-02-02
2018-06-05
General Electric Company
Systems and methods for measuring temperature in a gas turbine using acoustic interference

US10197456B2
(en)

2015-02-02
2019-02-05
General Electric Company
Systems and methods for measuring temperature in a gas turbine using acoustic interference

1968

1968-10-17
US
US768423A
patent/US3566689A/en
not_active
Expired – Lifetime

1969

1969-09-24
GB
GB46911/69A
patent/GB1268453A/en
not_active
Expired

1969-10-04
DE
DE19691950225
patent/DE1950225A1/en
active
Pending

1969-10-14
CH
CH1539269A
patent/CH507512A/en
not_active
IP Right Cessation

1969-10-17
FR
FR6935749A
patent/FR2020947A1/fr
not_active
Withdrawn

Also Published As

Publication number
Publication date

US3566689A
(en)

1971-03-02

CH507512A
(en)

1971-05-15

FR2020947A1
(en)

1970-07-17

DE1950225A1
(en)

1970-04-30

Información de contacto