# US 2014/0150555 A1 · Property measuring device for object to be measured and property measuring method for object to be measured > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150555 A1 - Document ID: US20140150555A1 - Status: Published application - Kind: A1 - Application number: 14/233,696 - Filed: 2012-07-10 - Published: 2014-06-05 - Earliest claimed: 2011-07-20 - Assignees: Tokyo University of Agriculture and Technology - Inventors: Kenji Ikushima - Web page: https://patentgrep.com/patent/US20140150555A1 ## CPC - G01N 27/725: {by using magneto-acoustical effects or the Barkhausen effect} - G01N 29/043: {in the interior, e.g. by shear waves} - G01N 29/2418: {using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics (photoacoustic cells G01N21/1702; measuring characteristics of vibrations by using radiation-sensitive means G01H9/00; acousto-optical conversion techniques for short-range imaging G01S15/8965; sound-producing devices using laser bundle G10K15/046)} - G01N 29/2431: {using other means for acoustic excitation, e.g. heat, microwaves, electron beams (sound producing devices not otherwise provided for G10K15/04)} - G01N 29/346: {with amplitude characteristics, e.g. modulated signal} - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) ## Abstract [Problem to be Solved] To provide a property measuring device for measuring a measurement object, which can highly reliably extract an electric signal serving as the measurement object from an electromagnetic field noise or the like generated by an acoustic wave generating source even if the acoustic wave is a continuous wave, while a high spatial resolution is maintained, by using an acoustic wave as a properly measuring means for measuring an object and method thereof. [Means for Solving the Problem] A property measuring device 100 for measuring a measurement object of the present invention includes: an acoustic wave emitting portion 40 arranged away from a measurement object 90 and emitting an amplitude-modulated acoustic wave; a receiver 50 for receiving an electromagnetic field generated when the acoustic wave is emitted to the measurement object 90; and a measuring portion 60 for extracting at least one type of properties selected from a group consisting of an electric property, a magnetic property, an electromechanical property, and a magnetomechanical property of the measurement object 90, based on at least one measurement selected from a group consisting of measurements of a strength, a phase, and a frequency of the electromagnetic field. ## Claims ### Claim 1 A property measuring device for measuring a measurement object, the device comprising: an acoustic wave emitting portion arranged away from the measurement object and emitting an amplitude-modulated or frequency-modulated acoustic wave; a receiver for receiving an electromagnetic field generated when the acoustic wave is emitted to the measurement object; and a measuring portion for extracting at least one type of properties selected from a group consisting of an electric property, a magnetic property, an electromechanical property, and a magnetomechanical property of the measurement object, based on at least one measurement selected from a group consisting of measurements of a strength, a phase, and a frequency of the electromagnetic field. ### Claim 2 (depends on 1) The property measuring device for measuring a measurement object according to claim 1, wherein the acoustic wave emitting portion continuously generates the amplitude-modulated or frequency-modulated acoustic wave. ### Claim 3 (depends on 2) The property measuring device for measuring a measurement object according to claim 2, wherein the measuring portion extracts a maximum point or a minimum point of the strength by sweeping a modulated frequency of the amplitude-modulated acoustic wave or a modulated frequency of the frequency-modulated acoustic wave emitted from the acoustic wave emitting portion with respect to an electromagnetic field shifted by a predetermined angle from a phase of the acoustic wave generated by the acoustic wave emitting portion. ### Claim 4 (depends on 2) The property measuring device for measuring a measurement object according to claim 2, wherein the receiver receives an electromagnetic field generated when the amplitude-modulated or frequency-modulated acoustic wave which is continuously generated is emitted to the measurement object. ### Claim 5 (depends on 1) The property measuring device for measuring a measurement object according to claim 1, wherein the receiver includes an SQUID (Superconducting Quantum Interference Device) for detecting an electromagnetic field. ### Claim 6 A property measuring method for measuring a measurement object, the method comprising the steps of: emitting an amplitude-modulated or frequency-modulated acoustic wave to the measurement object; receiving an electromagnetic field generated by the measurement object; and measuring which extracts at least one type of properties selected from a group consisting of an electric property, a magnetic property, an electromechanical property, and a magnetomechanical property of the measurement object, based on at least one measurement selected from a group consisting of measurements of a strength, a phase, and a frequency of the electromagnetic field. ### Claim 7 (depends on 6) The property measuring method for measuring a measurement object according to claim 6, wherein the acoustic wave is the amplitude-modulated or frequency-modulated acoustic wave which is continuous. ### Claim 8 (depends on 6) The property measuring method for measuring a measurement object according to claim 6, wherein the step of measuring extracts a maximum point or a minimum point of the strength by sweeping a modulated frequency of the amplitude-modulated acoustic wave or a modulated frequency of the frequency-modulated acoustic wave with respect to an electromagnetic field shifted by a predetermined angle from a phase of the acoustic wave generated in the step of emitting. ### Claim 9 (depends on 7) The property measuring method for measuring a measurement object according to claim 7, wherein an electromagnetic field, which is generated when the amplitude-modulated or frequency-modulated acoustic wave which is continuously generated is emitted to the measurement object, is received in the step of receiving. ### Claim 10 (depends on 6) The property measuring method for measuring a measurement object according to claim 6, wherein the step of receiving is performed by an SQUID (Superconducting Quantum Interference Device). ### Claim 11 (depends on 1) The property measuring device for measuring a measurement object according to claim 1, wherein the measuring portion extracts a maximum point or a minimum point of the strength by sweeping a modulated frequency of the amplitude-modulated acoustic wave or a modulated frequency of the frequency-modulated acoustic wave emitted from the acoustic wave emitting portion with respect to an electromagnetic field shifted by a predetermined angle from a phase of the acoustic wave generated by the acoustic wave emitting portion. ### Claim 12 (depends on 2) The property measuring device for measuring a measurement object according to claim 2, wherein the receiver includes an SQUID (Superconducting Quantum Interference Device) for detecting an electromagnetic field. ### Claim 13 (depends on 4) The property measuring device for measuring a measurement object according to claim 4, wherein the receiver includes an SQUID (Superconducting Quantum Interference Device) for detecting an electromagnetic field. ### Claim 14 (depends on 7) The property measuring method for measuring a measurement object according to claim 7, wherein the step of measuring extracts a maximum point or a minimum point of the strength by sweeping a modulated frequency of the amplitude-modulated acoustic wave or a modulated frequency of the frequency-modulated acoustic wave with respect to an electromagnetic field shifted by a predetermined angle from a phase of the acoustic wave generated in the step of emitting. ### Claim 15 (depends on 7) The property measuring method for measuring a measurement object according to claim 7, wherein the step of receiving is performed by an SQUID (Superconducting Quantum Interference Device). ### Claim 16 (depends on 9) The property measuring method for measuring a measurement object according to claim 9, wherein the step of receiving is performed by an SQUID (Superconducting Quantum Interference Device).