Noncontact monitoring of liquid surface levels with a precision of 10 micrometers: A simple ultrasound device

Autor:	C. Mingotaud, Yicheng Wang, L. K. Patterson
Rok vydání:	1991
Předmět:	Surface (mathematics) Interferometry Optics Materials science SIMPLE (military communications protocol) business.industry Interface (computing) Transmitter Ultrasonic testing Measure (physics) business Instrumentation Position sensor
Zdroj:	Review of Scientific Instruments. 62:1640-1641
ISSN:	1089-7623 0034-6748
DOI:	10.1063/1.1142445
Popis:	A simple inexpensive device has been designed to measure the position of a flat surface to an accuracy of ±10 μm and has been applied to monitor water levels in studies of spread monolayers at the air‐water interface. This instrument provides for determination of surface location in a range intermediate between those accessible by physical methods and those requiring the much more expensive and difficult techniques of interferometry. This technique utilizes a sound transmitter operating at 45 kHz and simple microphones coupled to phase‐shift measurements via a phase‐to‐voltage converter.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b20df9565bd00a7f41e2fb73c6ffd5ff https://doi.org/10.1063/1.1142445 Zobrazit plný text záznamu