| 摘要 |
<p>1405004 Selective signalling SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ NV 4 Sept 1972 [6 Sept 1971] 40906/72 Heading G4H Data recording apparatus, suitable for use on vehicles, e.g. road tankers, comprises a magnetic taperecorderfedvia a scanner with pulse-type outputs of meters providing operational data to be recorded automatically and the pulse-type output of a manual input device, inputs to the recorder from the meters being interrupted as long as the manual input device is in use. The meters are a driving speed indicator (a tachometer, pulses from which are counted for fixed periods of time), an engine revolution counter, and a volume -flowmeter for the liquid load of the road tanker. Time signals from a clock control the scanner.</p> |
