System for measuring pressure and temperature
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01N-029/024
G01K-011/22
G01L-011/06
G01L-019/00
G01N-029/036
G01N-029/32
출원번호
US-0000102
(2012-02-16)
등록번호
US-9581568
(2017-02-28)
우선권정보
NO-20110271 (2011-02-16)
국제출원번호
PCT/EP2012/052665
(2012-02-16)
§371/§102 date
20140305
(20140305)
국제공개번호
WO2012/110588
(2012-08-23)
발명자
/ 주소
Borgen, Harald
Petersen, David Christian
Schmedling, Petter F.
Bornstein, Marius
Sjulstad, Trond
Karlsen, Morten Roll
Taranrød, Andreas Bjerknes
Bendiksen, Jan Martin
Brandsæter, Tor Helge
출원인 / 주소
Techni AS
대리인 / 주소
Osha Liang LLP
인용정보
피인용 횟수 :
0인용 특허 :
4
초록▼
The present invention relates to system for measuring pressure and temperature based on change in the characteristic properties of a medium for ultrasound under the effect of pressure and temperature. The invention is based on two waveguides where geometry is adapted to the medium's characteristic p
The present invention relates to system for measuring pressure and temperature based on change in the characteristic properties of a medium for ultrasound under the effect of pressure and temperature. The invention is based on two waveguides where geometry is adapted to the medium's characteristic properties for ultrasound such that only planar pressure waves are generated in the waveguides. The first of the waveguides is arranged for measuring temperature due to thermal expansion of the medium, where the medium is pressure-compensated by means of an internal compensator to prevent thermal pressure accumulation, and where measuring temperature is based on the medium's specific known characteristic data for ultrasound under the effect of temperature under constant pressure. The second waveguide is arranged for measuring pressure, based on waveguide and the medium's known characteristic properties for thermal expansion and pressure, and where the thermal effect is corrected analytically based on measurement of temperature in the first channel. The physical principle of the invention is based on the properties of a medium (oil) where the stability for high temperature and pressure is crucial for long-term properties. Long-term properties of ultrasound sensors are not physically linked to the medium's properties, such that change in characteristic properties of ultrasound sensors does not impair the accuracy of the medium unless the function of the ultrasound sensors ceases. The physical principle of the invention allows an arrangement where ultrasound sensors can be separated from measuring channels by a pressure barrier, such that the integrity of the pressure barrier is not broken.
대표청구항▼
1. A system for measuring pressure and temperature based on ultrasound, the system comprising: a sensor comprising two separate measuring channels being in the form of a space or gap, and an ultrasonic transducer, the ultrasonic transducer being arranged in recesses to transmit and receive ultrasoun
1. A system for measuring pressure and temperature based on ultrasound, the system comprising: a sensor comprising two separate measuring channels being in the form of a space or gap, and an ultrasonic transducer, the ultrasonic transducer being arranged in recesses to transmit and receive ultrasound to and from the two separate measuring channels,said measuring channels containing a medium in liquid state whose pressure and temperature properties are known,wherein a first measuring channel of the two separate measuring channels is separated from a surrounding pressure of the measuring channels and wherein the first measuring channel is filled with a flexible medium and has an internal pressure compensator by a bellows for eliminating pressure accumulation due to temperature expansion, and wherein temperature is measured due to change in the properties of the medium for ultrasound, said change being measured by transit time or resonance frequency,a second measuring channel of the two separate measuring channels comprising a flexible bellows being open to a surrounding medium and wherein the flexible bellows in the second measuring channel transfers ambient pressure into a change in the properties of the second measuring channel for transit time or resonance frequency in the medium, andwherein temperature measurement in the first measuring channel is used to correct temperature effect on pressure measurement in the second measuring channel. 2. The system according to claim 1, wherein measuring channels for pressure and temperature are physically separated from ultrasound oscillator elements by a barrier, said barrier acting as an integral part of the ultrasound sensor. 3. The system according to claim 1, wherein measuring channels for pressure and temperature are physically separated from the ultrasonic transducer but is connected to the measuring channels in the form of solid rods, wherein the ultrasonic transducer communicates with measuring channels through said solid rods. 4. The system according to claim 1, wherein the first measuring channel for temperature is based on temperature expansion under constant pressure where change in density results in a change in sound velocity that is measured by change in transit time. 5. The system according to claim 1, wherein the first measuring channel for temperature is based on temperature expansion under constant pressure where change in density results in a change in sound velocity, wherein both density and sound velocity alter the impedance of the medium, which in turn excites a measurable resonance frequency between two media, the resonance frequency being a known constructed state due to temperature in the medium. 6. The system according to claim 1, wherein the second measuring channel for pressure is based on change in density due to compression, which in turn leads to a change in sound velocity, said change being measured by transit time measurement for ultrasound where the temperature effect of the medium is corrected by temperature measured in the first measuring channel for temperature. 7. The system according to claim 1, wherein the second measuring channel for pressure is based on change in density due to compression which in turn leads to a change in sound velocity, wherein change in the ultrasound impedance of the medium due to variation in density and sound velocity that is measured by the change in response is based on characteristic-constructed resonance frequency, wherein correction is made for temperature effect measured in the first measuring channel for temperature. 8. The system according to claim 1, wherein a measuring channel for pressure is based on a pressure-proportional mechanical change in length of a waveguide, and where constant pressure in a medium of the waveguide is provided by constant pressure compensation, andwherein the first measuring channel provides temperature compensations due to temperature impact for the change in length, the change in length being measured by transit time. 9. The system according to claim 2, wherein a measuring channel for pressure is based on a pressure-proportional mechanical change in length of a waveguide, and where constant pressure in a medium of the waveguide is provided by constant pressure compensation, andwherein the first measuring channel provides temperature compensations due to temperature impact for the change in length, the change in length being measured by transit time. 10. The system according to claim 3, wherein a measuring channel for pressure is based on a pressure-proportional mechanical change in length of a waveguide, and where constant pressure in a medium of the waveguide is provided by constant pressure compensation, andwherein the first measuring channel provides temperature compensations due to temperature impact for the change in length, the change in length being measured by transit time. 11. The system according to claim 4, wherein a measuring channel for pressure is based on a pressure-proportional mechanical change in length of a waveguide, and where constant pressure in a medium of the waveguide is provided by constant pressure compensation, andwherein the first measuring channel provides temperature compensations due to temperature impact for the change in length, the change in length being measured by transit time. 12. The system according to claim 5, wherein a measuring channel for pressure is based on a pressure-proportional mechanical change in length of a waveguide, and where constant pressure in a medium of the waveguide is provided by constant pressure compensation, andwherein the first measuring channel provides temperature compensations due to temperature impact for the change in length, the change in length being measured by transit time. 13. The system according to claim 1, wherein a measuring channel for pressure is based on direct proportional mechanical change in length of a waveguide, where constant pressure in a medium of the waveguide is provided by pressure compensation, and where change in pressure-proportional length is measured by the change in constructed resonance frequency where correction is made for temperature effect measured in the measuring channel for temperature. 14. The system according to claim 2, wherein a measuring channel for pressure is based on direct proportional mechanical change in length of a waveguide, where constant pressure in a medium of the waveguide is provided by pressure compensation, and where change in pressure-proportional length is measured by the change in constructed resonance frequency Where correction is made for temperature effect measured in the measuring channel for temperature. 15. The system according to claim 3, wherein a measuring channel for pressure is based on direct proportional mechanical change in length of a waveguide, where constant pressure in a medium of the waveguide is provided by pressure compensation, and where change in pressure-proportional length is measured by the change in constructed resonance frequency where correction is made for temperature effect measured in the measuring channel for temperature. 16. The system according to claim 4, wherein a measuring channel for pressure is based on direct proportional mechanical change in length of a waveguide, where constant pressure in a medium of the waveguide is provided by pressure compensation, and where change in pressure-proportional length is measured by the change in constructed resonance frequency where correction is made for temperature effect measured in the measuring channel for temperature. 17. The system according to claim 5, wherein a measuring channel for pressure is based on direct proportional mechanical change in length of a waveguide, where constant pressure in a medium of the waveguide is provided by pressure compensation, and where change in pressure-proportional length is measured by the change in constructed resonance frequency where correction is made for temperature effect measured in the measuring channel for temperature.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (4)
Klaus Allmendinger DE; Martin Hart DE; Robert Loisch DE; Matthias Scherer DE, Method and device for determining gas pressure and temperature in an hollow space.
Sarvazian Armen P. (mikroraion “AB” ; 9,kv.36 Puschino na Oke ; Serukhovsky raion ; Moskovskaya oblast RUX) Belonenko Vladimir N. (10 ; kv. 6 poselok Razvilka ; Leninsky raion ; Moskovskaya oblast , Method for determining physical stage parameters of a medium and an apparatus for carrying out same.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.