Length measuring device

Details Length measuring device Length measuring device

1988-07-25

1989-10-03

Heyman, John S.

Boots, shoes, and leggings

36457107, 377 19, 377 25, 377 49, 324207, 324225, 307491, G01B 702, G06F 1116, G06F 1122

Patent

active

048721247

ABSTRACT:
At the start of measurement by a length measuring device, a calibration coil in which the temperature characteristics are known, is connected to an oscillator. The oscillation frequency of the oscillator at this time is counted by a counter and is given to microcomputer. Microcomputer obtains temperature information corresponding to counted numbers with reference to a table of counted numbers versus temperature information which has already stored temperature information corresponding to a plurality of counted numbers and stores the obtained temperature information in a data storage area. In measurement mode, measured values subjected to temperature compensation are obtained according to the temperature information stored in the data storage area.

REFERENCES:
patent: 4331920 (1982-05-01), Kalisch et al.
patent: 4458322 (1984-07-01), Veale
patent: 4556846 (1985-12-01), D'Hondt
patent: 4602871 (1986-07-01), Hanaoka
patent: 4644482 (1987-02-01), Juanarena
patent: 4796212 (1989-01-01), Kitagawa
patent: 4817022 (1989-03-01), Jornud et al.

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