A Remote-Position Analyzer with Electronic Output
作者:
G. T. Wood,
期刊:
American Journal of Physics
(AIP Available online 1974)
卷期:
Volume 42,
issue 11
页码: 952-957
ISSN:0002-9505
年代: 1974
DOI:10.1119/1.1987903
出版商: American Association of Physics Teachers
数据来源: AIP
摘要:
A remote position measuring device with electrical coupling to a computer has been developed for use in the elementary-physics laboratory. Light from a moving object and a fixed-reference lamp is focused by a lens on a hollow, rotating drum with equally-spaced slits. The light passing through a slit is detected with a phototube. The time difference of amplified phototube signals from the object and reference-light sources is a measure of the position coordinate of the object at the time of the object signal. The model constructed has a precision of about 0.03 cm, better than a 3% differential linearity for a 40-cm field of view in the object plane and a sampling rate of30 sec−1.The device can track more than one object simultaneously and has been successful in providing position samples for two colliding gliders on an air-track.
点击下载:
PDF
(834KB)
返 回