| 释义 |
comparator|ˈkɒmpəreɪtə(r)|
[agent-n. in L. form f. comparāre to compare: in mod.F. comparateur.]
An instrument for comparing, e.g. the lengths of nearly equal bars. Hence, any of various devices which measure or otherwise check manufactured articles, or the output or performance of a machine, etc., by comparison with a standard (see quots.).
1883Catal. Yale College 100 Apparatus..in Thermometry, including comparators, cathetometers, etc. 1904Goodchild & Tweney Technol. & Sci. Dict. 121/2 Comparator (Phys.), an instrument for comparing a given scale of lengths with a Standard Scale. 1922F. W. Aston Isotopes iii. 60 The most accurate measurements were made on a comparator. 1955Sci. News Let. 22 Oct. 272/3 Hand comparator for judging surface roughness of mass-produced parts permits metal surfaces to be compared. 1959News Chron. 28 Nov. 6/8 At many hi-fi showrooms you can hear the relative performances of different speakers by means of a ‘comparator’. 1961Times 31 May 18/4 An instrument known as a comparator which can test 6,000 resistors an hour. 1962Gloss. Autom. Data Processing (B.S.I.) 97 Tape comparator, a machine which automatically compares two supposedly identical paper tapes row by row and stops when there is a discrepancy. |