发明名称 |
Digital photo-optical tachometer |
摘要 |
A digital tachometer having an optical sensor which provides a signal at a frequency related to the rotational or reciprocating speed of a moving object, a phase locked loop and a frequency divider circuit connected for operation as a frequency multiplier to be responsive to the sensor signal to provide a serial pulse train the period of which is an integral multiple of the sensor signal, a pulse accumulator for registering the pulses and a time rate generator which enables the pulse accumulator to register pulses for a preset duration so that the number of pulses registered is a direct representation of the revolutions per minute of the moving object.
|
申请公布号 |
US4031466(A) |
申请公布日期 |
1977.06.21 |
申请号 |
US19750574252 |
申请日期 |
1975.05.05 |
申请人 |
THE PIONEER ELECTRIC AND RESEARCH CORPORATION |
发明人 |
KRAUSE, ERNEST HARRY;SEAMAN, WESLEY ARTHUR;ANGELOPOULOS, PETER GREGORY |
分类号 |
G01P3/489;(IPC1-7):G01P3/36;G01R25/00 |
主分类号 |
G01P3/489 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|