US5035247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor for non-invasive measurement of sound, pressure and vibration on the human body
Assignee: Individual
•
Filing: 1988-12-29
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Granted: 1991-07-30
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Expires: 2008-12-29
Abstract
Abstract The invention relates to a sensor (1) for non-invasive measurement of sound, pressure and vibration on the human body which features a transducer in the form of a transducer membrane (23) to achieve a very good response characteristic coupled with low weight and small size. The transducer diaphragm (23) is preferably configured as a piezoelectric foil which converts the mechanical input variables into electrical signals which can be processed by means of processor units.
Inventors
- 👤 Jochen Heimann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:10
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B7/00; A61B7/02; A61B7/04; H; H04; H04R; H04R17/00; H04R17/02; H04R17/025; A61B2562/00; A61B2562/02; A61B2562/0204
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
115 words
A sensor for non-invasive measurement of sound, pressure and vibration on the human body comprising: a sensor cell featuring a probe which can be placed on the surface of said body to sense mechanical input variables; a housing providing an enclosure; a transducer comprising a piezoelectric foil diaphragm located in said enclosure with the transducer being coupled to said probe and which converts said mechanical input variables into an electrical signal; a transmission device connected to said transducer; and a signal preamplifier connected via said transmission device to said transducer and which can be connected to a processing unit, said housing having a pressure offset port which is smaller than the wavelength to be received.
Claim 2
Dependent Claim
115 words
A sensor for non-invasive measurement of sound, pressure and vibration on the human body comprising: a sensor cell featuring a probe which can be placed on the surface of said body to sense mechanical input variables; a housing providing an enclosure; a transducer comprising a piezoelectric foil diaphragm located in said enclosure with the transducer being coupled to said probe and which converts said mechanical input variables into an electrical signal; a transmission device connected to said transducer; and a signal preamplifier connected via said transmission device to said transducer and which can be connected to a processing unit, said housing having a pressure offset port which is smaller than the wavelength to be received.
Claim 3
Dependent Claim
20 words
A sensor as claimed in claim 1 wherein said enclosure comprises an electrically conducting part and an electrically nonconducting part.
Claim 4
Dependent Claim
13 words
A sensor as claimed in claim 4 wherein said enclosure is dynamically balanced.
Claim 5
Dependent Claim
23 words
A sensor as claimed in any of claims 1 through 3 wherein said probe penetrates a wall of said enclosure and projects therefrom.
Claim 6
Dependent Claim
26 words
A sensor as claimed in any of claims 1 through 4 wherein the mass of said probe is much smaller than the mass of said enclosure.
Claim 7
Dependent Claim
19 words
A sensor as claimed in claim 5 wherein the total mass of said sensor is less than 2 g.
Claim 8
Dependent Claim
18 words
Sensor as claimed in any of claims 1 through 6 wherein said transmission device is a short cable.
Claim 9
Dependent Claim
18 words
Sensor as claimed in claim 7 wherein said cable has a high insulation resistance and a low capacitance.
Claim 10
Dependent Claim
17 words
Sensor as claimed in claim 2 wherein said electrically conducting part of said enclosure is of brass.
Claim 11
Dependent Claim
17 words
Sensor as claimed in claim 2 wherein said non-electrically conducting part of said enclosure is of PVC.
Claim 12
Dependent Claim
19 words
Sensor as claimed in any of claims 1 through 10 wherein said signal preamplifier is an active charge amplifier.
Claim 13
Dependent Claim
20 words
Sensor as claimed in any of claims 1 through 11 wherein said signal preamplifier is located on said housing enclosure.
Claim 14
Dependent Claim
22 words
Sensor as claimed in any of claims 1 through 12 wherein said probe is coupled to said transducer by a spring element.
Claim 15
Dependent Claim
21 words
Sensor as claimed in claim 13 wherein the rigidity of said spring element is less than that of said transducer diaphragm.
Claim 16
Dependent Claim
16 words
Sensor as claimed in claim 13 or 14 wherein said spring element is a flex diaphragm.
Claim 17
Dependent Claim
17 words
Sensor as claimed in any of claims 1 through 15 wherein said probe is spherical or ellipsoidal.
Claim 18
Dependent Claim
20 words
Sensor as claimed in any of claims 1 through 12 wherein said probe and said transducer are a single member.
Claim 19
Dependent Claim
14 words
Sensor as claimed in claim 17 wherein said member is a piezoelectric transducer diaphragm.
Claim 20
Dependent Claim
17 words
Sensor as claimed in claim 17 or 18 wherein said diaphragm is tensioned between said enclosure parts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-29 | 1995-01-28 | 1995-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-29 | 1999-01-28 | 1999-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-29 | 2003-01-28 | 2003-07-30 | $7700.00 | Window Closed / Lapsed |