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公开(公告)号：DE19808222A1
公开(公告)日：1999-09-02
申请号：DE19808222
申请日：1998-02-27
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRAENDLE HUBERT , BODOR PATRICK
Abstract: The invention relates to a wavelength-coded pressure sensor (1) with fibre-integrated Bragg grating, which is especially suitable for use at high pressures and temperatures in oil wells. The sensor principle provided for in the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium (11) is converted by means of a transducer (1) into a longitudinal lengthening or compression of the fibre. The transducer (1) comprises a measurement or pressure cylinder (7a) which exchanges pressure with the medium (11), and a reference cylinder (7b) which is shielded from the medium (11) or subjected to a counter pressure. Temperature-compensated transducers (1) with a temperature-independent Bragg wavelength lambda B can be obtained because a suitable temperature-dependence of the mechanical prestressing of the pressure sensor fibre (3) is achieved through the selection of the materials, lengths and arrangements of the fibre holder support (5a, 5b). A fibre-integrated Bragg grating temperature sensor (19, 20) can also be provided. The invention further relates to transducers (1) with different cylinder arrangements (7a, 7b) and a wavelength multiplex configuration comprising several transducers (1).
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公开(公告)号：BR9908314A
公开(公告)日：2000-11-07
申请号：BR9908314
申请日：1999-02-12
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRAENDLE HUBERT , BODOR PATRICK
Abstract: The subject-matter of the present invention is a wavelength-coded fiber Bragg grating pressure sensor 1 which is suitable, in particular, for use in the case of high pressures and temperatures in oil drill holes. The sensor principle according to the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium 11 is converted with the aid of a transducer 1 into a longitudinal fiber elongation or fiber compression. The transducer 1 comprises a measuring or pressure cylinder 7a which exchanges pressure with the medium 11, and a reference cylinder 7b which is shielded from the medium 11 or oppositely pressure-loaded. Temperature-compensated transducers 1 with a temperature-independent Bragg wavelength lambdB can be realized by introducing a suitable temperature dependence of the mechanical prestressing of the pressure sensor fiber 3 by selecting the materials, lengths and arrangements of the fiber holder supports 5a, 5b. A fiber Bragg grating temperature sensor 19, 20 can be provided, in addition. Also specified are transducers 1 with other cylinder arrangements 7a, 7b, and a wavelength-division multiplex configuration with several transducers 1.
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Patent Agency Ranking
公开(公告)号：NO20004276L
公开(公告)日：2000-10-18
申请号：NO20004276
申请日：2000-08-25
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRONDLE HUBERT , BODOR PATRICK
Abstract: The subject-matter of the present invention is a wavelength-coded fiber Bragg grating pressure sensor 1 which is suitable, in particular, for use in the case of high pressures and temperatures in oil drill holes. The sensor principle according to the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium 11 is converted with the aid of a transducer 1 into a longitudinal fiber elongation or fiber compression. The transducer 1 comprises a measuring or pressure cylinder 7a which exchanges pressure with the medium 11, and a reference cylinder 7b which is shielded from the medium 11 or oppositely pressure-loaded. Temperature-compensated transducers 1 with a temperature-independent Bragg wavelength lambdB can be realized by introducing a suitable temperature dependence of the mechanical prestressing of the pressure sensor fiber 3 by selecting the materials, lengths and arrangements of the fiber holder supports 5a, 5b. A fiber Bragg grating temperature sensor 19, 20 can be provided, in addition. Also specified are transducers 1 with other cylinder arrangements 7a, 7b, and a wavelength-division multiplex configuration with several transducers 1.
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公开(公告)号：NO20004276A
公开(公告)日：2000-10-18
申请号：NO20004276
申请日：2000-08-25
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRONDLE HUBERT , BODOR PATRICK
CPC classification number: G01L9/0007 , G01L9/0032 , G01L11/025
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公开(公告)号：DE59910014D1
公开(公告)日：2004-08-26
申请号：DE59910014
申请日：1999-02-12
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRAENDLE HUBERT , BODOR PATRICK
Abstract: The subject-matter of the present invention is a wavelength-coded fiber Bragg grating pressure sensor 1 which is suitable, in particular, for use in the case of high pressures and temperatures in oil drill holes. The sensor principle according to the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium 11 is converted with the aid of a transducer 1 into a longitudinal fiber elongation or fiber compression. The transducer 1 comprises a measuring or pressure cylinder 7a which exchanges pressure with the medium 11, and a reference cylinder 7b which is shielded from the medium 11 or oppositely pressure-loaded. Temperature-compensated transducers 1 with a temperature-independent Bragg wavelength lambdB can be realized by introducing a suitable temperature dependence of the mechanical prestressing of the pressure sensor fiber 3 by selecting the materials, lengths and arrangements of the fiber holder supports 5a, 5b. A fiber Bragg grating temperature sensor 19, 20 can be provided, in addition. Also specified are transducers 1 with other cylinder arrangements 7a, 7b, and a wavelength-division multiplex configuration with several transducers 1.
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公开(公告)号：NO20004276D0
公开(公告)日：2000-08-25
申请号：NO20004276
申请日：2000-08-25
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRONDLE HUBERT , BODOR PATRICK
Abstract: The subject-matter of the present invention is a wavelength-coded fiber Bragg grating pressure sensor 1 which is suitable, in particular, for use in the case of high pressures and temperatures in oil drill holes. The sensor principle according to the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium 11 is converted with the aid of a transducer 1 into a longitudinal fiber elongation or fiber compression. The transducer 1 comprises a measuring or pressure cylinder 7a which exchanges pressure with the medium 11, and a reference cylinder 7b which is shielded from the medium 11 or oppositely pressure-loaded. Temperature-compensated transducers 1 with a temperature-independent Bragg wavelength lambdB can be realized by introducing a suitable temperature dependence of the mechanical prestressing of the pressure sensor fiber 3 by selecting the materials, lengths and arrangements of the fiber holder supports 5a, 5b. A fiber Bragg grating temperature sensor 19, 20 can be provided, in addition. Also specified are transducers 1 with other cylinder arrangements 7a, 7b, and a wavelength-division multiplex configuration with several transducers 1.
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公开(公告)号：AU3244099A
公开(公告)日：1999-09-15
申请号：AU3244099
申请日：1999-02-12
Applicant: ABB RESEARCH LTD
Inventor： BOHNERT KLAUS , BRANDLE HUBERT , BODOR PATRICK
Abstract: The subject-matter of the present invention is a wavelength-coded fiber Bragg grating pressure sensor 1 which is suitable, in particular, for use in the case of high pressures and temperatures in oil drill holes. The sensor principle according to the invention is based on the fact that the hydrostatic pressure of a liquid or gaseous medium 11 is converted with the aid of a transducer 1 into a longitudinal fiber elongation or fiber compression. The transducer 1 comprises a measuring or pressure cylinder 7a which exchanges pressure with the medium 11, and a reference cylinder 7b which is shielded from the medium 11 or oppositely pressure-loaded. Temperature-compensated transducers 1 with a temperature-independent Bragg wavelength lambdB can be realized by introducing a suitable temperature dependence of the mechanical prestressing of the pressure sensor fiber 3 by selecting the materials, lengths and arrangements of the fiber holder supports 5a, 5b. A fiber Bragg grating temperature sensor 19, 20 can be provided, in addition. Also specified are transducers 1 with other cylinder arrangements 7a, 7b, and a wavelength-division multiplex configuration with several transducers 1.
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