G01H MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
Introduced: September 1968
Description
G01H covers instruments and methods for measuring mechanical vibrations across the acoustic spectrum, including ultrasonic (>20 kHz), sonic (20 Hz–20 kHz), and infrasonic (<20 Hz) waves. This subclass encompasses accelerometers, vibration sensors, acoustic transducers, and related devices used to detect, quantify, and analyze vibrational phenomena in materials, structures, and media. Typical applications include non-destructive testing, structural health monitoring, condition-based maintenance, and acoustic characterization of mechanical systems. Related measurements of sound intensity, pressure, and frequency are generally classified separately under G01N (analytical testing of materials) or H04R (acoustics in general).
IPC and CPC are identically structured here. All 9 subcodes exist in both systems.
2 shared codes have differing titles between IPC and CPC.
Child Classifications
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- G01H 1/00 Measuring vibrations in solids by using direct conduction to the detector (G01H9/00, G01H11/00 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
- G01H 11/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties IPC+CPC Available in IPC and CPC
- G01H 17/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the other groups of this subclass since 1985 IPC+CPC Available in IPC and CPC
- G01H 3/00 Measuring vibrations by using a detector in a fluid (G01H7/00, G01H9/00, G01H11/00 take precedence) +1 CPC IPC+CPC Available in IPC and CPC
- G01H 5/00 Measuring propagation velocity of ultrasonic, sonic or infrasonic waves IPC+CPC Available in IPC and CPC
- G01H 9/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means +3 CPC IPC+CPC Available in IPC and CPC