US5883309A
Expired / Lapsed
US
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Adaptive optimization process for ultrasonic measurement signals
Assignee: Siemens AG
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Filing: 1996-02-23
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Granted: 1999-03-16
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Expires: 2016-02-23
Abstract
Abstract In order to optimize an ultrasound measurement signal application-specifically, an error value is formed from features with which an evaluation of the received ultrasound measurement signal is possible. An ultrasound signal, whose signal shape is modified by section-by-section variation of the shape of the transmission signal is emitted out, received and an error value is formed anew. This procedure is repeated until the error value assumes a minimum. The ultrasound measurement signal at which the error value is minimal corresponds to the optimized signal.
Inventors
- 👤 Martin Vossiek
- 👤 Peter-Christian Eccardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:13
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/34; B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223; B06B1/0238; B06B1/0246; B06B1/0261; G01N29/346; G01N29/36; G01N29/40; G01N29/44; G01N29/50; G01S; G01S7/00; G01S7/52; G01S7/52004; G01S7/523; G01S7/524
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
272 words
A method for adaptively optimizing an ultrasound measurement signal emitted by an ultrasound transducer, comprising the steps of: (a) exciting a transmitting ultrasound transducer with a transmission signal, said transmission signal exhibiting a signal curve comprising a plurality of successive sections, and thereby causing said transmitting ultrasound transducer to emit an emitted ultrasound signal which produces a reflected ultrasound signal; (b) receiving said reflected ultrasound signal with a reception ultrasound transducer as a received ultrasound signal, said received ultrasound signal having at least one feature representing a deviation of said emitted ultrasound signal from a predetermined optimum signal; (c) evaluating said received ultrasound signal to obtain an initial error value dependent on said at least one feature; (d) modifying a section of said transmission curve to obtain a modified transmission curve and exciting said transmission ultrasound transducer with said modified transmission curve to emit a new emitted ultrasound signal, which produces a new reflected ultrasound signal; (e) receiving said new reflected ultrasound signal as a new received ultrasound signal, said new received ultrasound signal also having said at least one feature; (f) evaluating said new received ultrasound signal to obtain a new error value dependent on said at least one feature in said new received ultrasound signal; (g) comparing said initial error value and said new error value and updating said transmission signal if said new error value is less than or equal to said initial error value, and repeating steps (d), (e) and (f) for said section if said new error value is larger than said initial error value; and (h) repeating steps (d) through (g) for all of said sections.
Claim 2
Independent Claim
272 words
A method for adaptively optimizing an ultrasound measurement signal emitted by an ultrasound transducer, comprising the steps of: (a) exciting a transmitting ultrasound transducer with a transmission signal, said transmission signal exhibiting a signal curve comprising a plurality of successive sections, and thereby causing said transmitting ultrasound transducer to emit an emitted ultrasound signal which produces a reflected ultrasound signal; (b) receiving said reflected ultrasound signal with a reception ultrasound transducer as a received ultrasound signal, said received ultrasound signal having at least one feature representing a deviation of said emitted ultrasound signal from a predetermined optimum signal; (c) evaluating said received ultrasound signal to obtain an initial error value dependent on said at least one feature; (d) modifying a section of said transmission curve to obtain a modified transmission curve and exciting said transmission ultrasound transducer with said modified transmission curve to emit a new emitted ultrasound signal, which produces a new reflected ultrasound signal; (e) receiving said new reflected ultrasound signal as a new received ultrasound signal, said new received ultrasound signal also having said at least one feature; (f) evaluating said new received ultrasound signal to obtain a new error value dependent on said at least one feature in said new received ultrasound signal; (g) comparing said initial error value and said new error value and updating said transmission signal if said new error value is less than or equal to said initial error value, and repeating steps (d), (e) and (f) for said section if said new error value is larger than said initial error value; and (h) repeating steps (d) through (g) for all of said sections.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1 comprising the additional step of using a single ultrasound transducer as said transmitting ultrasound transducer and as said reception ultrasound transducer.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 1 wherein step (d) comprises modifying a section of said transmission curve in successively smaller steps until a step width falls below a predetermined threshold.
Claim 5
Dependent Claim
38 words
A method as claimed in claim 1 wherein steps (b) and (e) are further defined by using an area defined by an envelope respectively of said received ultrasound signal and said new received ultrasound signal, as said feature.
Claim 6
Dependent Claim
35 words
A method as claimed in claim 1 wherein steps (b) and (e) are further defined by using an amplitude maximum respectively of said received ultrasound signal and said new received ultrasound signal, as said feature.
Claim 7
Dependent Claim
82 words
A method as claimed in claim 5 wherein step (c) is further defined by forming said initial error value as a quotient of an area defined by an envelope of said received ultrasound signal and said amplitude maximum of said received ultrasound signal, and wherein step (f) is further defined by forming said new error value as a quotient of an area defined by an envelope of said new received ultrasound signal and said amplitude maximum of said new received ultrasound signal.
Claim 8
Dependent Claim
47 words
A method as claimed in claim 1 wherein steps (b) and (e) are further defined by using a slope of a signal excerpt respectively of said received ultrasound signal and said new received ultrasound signal as said feature, for optimizing build-up time of said emitted ultrasound signal.
Claim 9
Dependent Claim
44 words
A method as claimed in claim 1 wherein steps (b) and (e) are further defined by using an amplitude maximum respectively of said received ultrasound signal and said new received ultrasound signal as said feature, for optimizing build-up time of said emitted ultrasound signal.
Claim 10
Dependent Claim
83 words
A method as claimed in claim 8 wherein step (b) is further defined by forming said initial error value as a reciprocal of a product of said amplitude of said received ultrasound signal and a slope of a signal excerpt of said received ultrasound signal, and wherein step (f) comprises forming said new error value as a reciprocal of a product of said amplitude of said new received ultrasound signal and a slope of a signal excerpt of said new received ultrasound signal.
Claim 11
Dependent Claim
44 words
A method as claimed in claim 1 comprising the additional step of overlaying said transmission signal with white noise having a noise power, and reducing said noise power of said white noise for each repetition of steps (d), (e) and (f) in step (g).
Claim 12
Dependent Claim
23 words
A method as claimed in claim 1 comprising the additional step of discretizing said received ultrasound signal and said new received ultrasound signal.
Claim 13
Dependent Claim
26 words
A method as claimed in claim 1 comprising the additional step of forming an envelope of said received ultrasound signal and said new received ultrasound signal.
References Cited (Backward Citations)
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