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Title: Digital rotation measurement unit

Abstract

A digital rotation indicator is disclosed for monitoring the position of a valve member having a movable actuator. The indicator utilizes mercury switches adapted to move in cooperation with the actuator. Each of the switches produces an output as it changes state when the actuator moves. A direction detection circuit is connected to the switches to produce a first digital signal indicative of the direction of rotation of the actuator. A count pulse generating circuit is also connected to the switches to produce a second digital pulse signal having count pulses corresponding to a change of state of any of the mercury switches. A reset pulse generating circuit is provided to generate a reset pulse each time a count pulse is generated. An up/down counter is connected to receive the first digital pulse signal and the second digital pulse signal and to count the pulses of the second digital pulse signal either up or down depending upon the instantaneous digital value of the first digital signal whereby a running count indicative of the movement of the actuator is maintained.

Inventors:
Issue Date:
OSTI Identifier:
6967802
Application Number:
ON: DE84010872
Assignee:
Dept. of Energy SNL; ERA-09-026892; EDB-84-085635
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Resource Relation:
Other Information: Portions are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; VALVES; INDICATORS; ACTUATORS; DIGITAL CIRCUITS; SWITCHES; CONTROL EQUIPMENT; ELECTRICAL EQUIPMENT; ELECTRONIC CIRCUITS; EQUIPMENT; FLOW REGULATORS; 440300* - Miscellaneous Instruments- (-1989)

Citation Formats

Sanderson, S.N. Digital rotation measurement unit. United States: N. p., 1983. Web.
Sanderson, S.N. Digital rotation measurement unit. United States.
Sanderson, S.N. Fri . "Digital rotation measurement unit". United States.
@article{osti_6967802,
title = {Digital rotation measurement unit},
author = {Sanderson, S.N.},
abstractNote = {A digital rotation indicator is disclosed for monitoring the position of a valve member having a movable actuator. The indicator utilizes mercury switches adapted to move in cooperation with the actuator. Each of the switches produces an output as it changes state when the actuator moves. A direction detection circuit is connected to the switches to produce a first digital signal indicative of the direction of rotation of the actuator. A count pulse generating circuit is also connected to the switches to produce a second digital pulse signal having count pulses corresponding to a change of state of any of the mercury switches. A reset pulse generating circuit is provided to generate a reset pulse each time a count pulse is generated. An up/down counter is connected to receive the first digital pulse signal and the second digital pulse signal and to count the pulses of the second digital pulse signal either up or down depending upon the instantaneous digital value of the first digital signal whereby a running count indicative of the movement of the actuator is maintained.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {9}
}