WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

G01H　MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES (generation of mechanical vibrations without measurement B06B, G10K; measuring position, direction or velocity of an object G01C, G01S; measuring quasi-steady pressure of a fluid G01L 7/00; determining unbalance G01M 1/14; determining properties of material by sonic or ultrasonic waves transmitted therethrough G01N; systems using the reflection or reradiation of acoustic waves, e.g. acoustic imaging, G01S 15/00; seismology, seismic prospecting, acoustic prospecting G01V 1/00; acousto-optical devices per se G02F; obtaining records by techniques analogous to photography using ultrasonic, sonic or infrasonic waves G03B 42/06; speech analysis or synthesis, speech recognition G10L; information storage based on relative movement between record carrier and transducer G11B; piezo-electric, electrostrictive or magnetostrictive elements in general H01L; manufacture of electromechanical resonators by processes which include measurement of frequency with consequential modification of the resonator H03H 3/00, {H03H 3/007, H03H 9/00})

G01H 1/00 Measuring {characteristics of} vibrations in solids by using direct conduction to the detector (G01H 9/00, G01H 11/00 take precedence)

G01H 1/003 ・{of rotating machines (G01H 1/10 takes precedence)}

G01H 1/006 ・・{of the rotor of turbo machines}

G01H 1/04 ・of vibrations which are transverse to direction of propagation

G01H 1/06 ・・Frequency

G01H 1/08 ・・Amplitude

G01H 1/10 ・of torsional vibrations

G01H 1/12 ・of longitudinal or not specified vibrations

G01H 1/14 ・・Frequency

G01H 1/16 ・・Amplitude

G01H 3/00 Measuring {characteristics of} vibrations by using a detector in a fluid (G01H 7/00, G01H 9/00, G01H 11/00 take precedence)

G01H 3/005 ・{Testing or calibrating of detectors covered by the subgroups of G01H 3/00(calibrating geophysical instruments, e.g. seismic receivers G01V 13/00)}

G01H 3/04 ・Frequency

G01H 3/06 ・・by electric means

G01H 3/08 ・・Analysing frequencies present in complex vibrations, e.g. comparing harmonics present {(acoustic presence detection G01V 1/001)}

G01H 3/10 ・Amplitude; Power

G01H 3/12 ・・by electric means (G01H 3/14 takes precedence)

G01H 3/125 ・・・{for representing acoustic field distribution (using optical means G01H 9/002; sonar systems for imaging G01S 7/56, G01S 15/89; acoustic holography G03H 3/00)}

G01H 3/14 ・・Measuring mean amplitude; Measuring mean power; Measuring time integral of power

G01H 5/00 Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, {e.g. of pressure waves}

G01H 7/00 Measuring reverberation time; {Room acoustic measurements}(measuring absorption of vibrations in a material G01N; modifying acoustic properties to change reverberation time G10K)

G01H 9/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means

G01H 9/002 ・{for representing acoustic field distribution (sonar systems for imaging G01S 7/56, G01S 15/89; acoustic holography G03H 3/00)}

G01H 9/004 ・{using fibre optic sensors (light guides per se G02B 6/00, acousto-optical devices specially adapted for gating or modulating in optical wave guides G02F 1/125)}

G01H 9/006 ・・{the vibrations causing a variation in the relative position of the end of a fibre and another element}

G01H 9/008 ・{by using ultrasonic waves (measuring position using ultrasonic waves G01S 15/02)}

G01H 11/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties, {e.g. capacitance or reluctance (structural combination of musical instruments with microphones or other pick-up devices G10H 3/16, G10H 3/18, G10H 3/20)}

G01H 11/02 ・by magnetic means e.g. reluctance

G01H 11/04 ・・using magnetostrictive devices

G01H 11/06 ・by electric means

G01H 11/08 ・・using piezo-electric devices

G01H 13/00 Measuring resonant frequency

G01H 15/00 Measuring mechanical or acoustic impedance

G01H 17/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups {see provisionally also G01H 1/00}