Communications: electrical – Continuously variable indicating – With meter reading
Patent
1998-07-24
2000-09-12
Zimmerman, Brian
Communications: electrical
Continuously variable indicating
With meter reading
34082565, 377 16, 377 27, H04Q 522
Patent
active
061183873
ABSTRACT:
When a cylinder is urged to displace a piston rod, and a pulse signal is inputted into a counter from an encoder, then the number of pulses of the pulse signal is counted by a counting section. A time-measuring section starts measurement for the elapsed time upon the start of operation of the cylinder. When the pulse signal is inputted, the elapsed time is reset. When the displacement of the piston rod is stopped, the pulse signal is not inputted. The elapsed time is increased to make coincidence with a predetermined preset time to output, to a control unit, a preset time elapse signal indicating this fact. At this time, the preset count value is compared with the count value of the pulse signal counted by the counting section. If the both are coincident with each other, a coincidence signal indicating this fact is outputted to the control unit. Accordingly, it is possible for the control unit to detect the stop of the cylinder and detect the displacement position of the piston rod at this time.
REFERENCES:
patent: 4612655 (1986-09-01), Nakamura
patent: 6002737 (1999-12-01), Devanagundy
patent: 6021171 (2000-02-01), Andrews
Hagiwara Katsumi
Ohata Toshio
Asongwed Anthony A.
SMC Kabushiki Kaisha
Zimmerman Brian
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