Acoustic Sensor II

• US 20140026665A1
• Filed: 02/16/2013
• Published: 01/30/2014
• Est. Priority Date: 07/31/2009
• Status: Abandoned Application

• Current Assignee: Keady, John
• Original Assignee: Keady, John
• Inventors: Keady, John
• Application Number:
  US13/769,324
• Publication Number:
  US 20140026665A1
• Time in Patent Office: Days
• US Class Current: 73/587
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/6826 Finger
• CPC Class Codes: A61B 5/6838 Clamps or clips
• CPC Class Codes: A61B 8/00 Diagnosis using ultrasonic, sonic or infrasonic waves imaging of objects using sonar G01S15/00
• CPC Class Codes: G01N 2291/02809 Concentration of a compound, e.g. measured by a surface mass change
• CPC Class Codes: G01N 29/032 by measuring attenuation of acoustic waves
• CPC Class Codes: G01N 29/14 using acoustic emission techniques echo of particles G01N29/046; measuring mechanical vibrations or acoustic waves in solids in general G01H1/00
• CPC Class Codes: G01N 29/348 with frequency characteristics, e.g. single frequency signals, chirp signals measuring frequency of mechanical vibrations or acoustic waves in general G01H1/06, G01H3/04; measuring frequency or analysing frequency spectra G01R23/00
• CPC Class Codes: G01N 29/4427 with stored values, e.g. threshold values

Abstract

At least one exemplary embodiment is directed to an acoustic sensor that can be used to identify various fluids as well as concentrations of compounds dissolved in liquids.

Claims

1. An acoustic sensor comprising:

a first device configured to emit a first acoustic signal within an emission frequency range;

a first microphone configured to measure a first measurement signal; and

a second microphone configured to measure a second measurement signal, where at least a first portion of the first acoustic signal passes through the medium, where the first measurement signal includes at least a second portion of the first acoustic signal, where the second measurement signal includes at least a third portion of the first acoustic signal, where the third portion of the first acoustic signal passes through at least a portion of the medium.

2. The sensor according to claim 1, further including:

a processor; and

computer readable memory, where the second and third portions are stored in the computer readable memory.

3. The sensor according to claim 2, where the processor is configured to compare the second and third portions against each other and compare the result to stored identification data, where a match of the result with the stored identification data within a predetermined error produces an identification of the medium.

4. The sensor according to claim 3 where the result is the coherence between the second and third portions.

5. The sensor according to claim 3, where the result is the complex transfer function.

6. The sensor according to claim 3, where the result is the phase angle difference between the second and third portions.

7. The sensor according to claim 4, where the match occurs when the result compared to stored values within +/−

0.1.

8. The sensor according to claim 5, where the match occurs when the result compared to stored values is within +/−

0.1 dB.

9. The sensor according to claim 6, where the match occurs when the result compared to stored values is within +/−

5 degrees.