Patent US4599623A successfully refreshed from Google Patents.
EP0216522A2
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Measuring device calibration
Assignee: Cummins Turbo Technologies Ltd
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Filing: 1986-08-22
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Granted: —
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Expires: 2006-08-22
Abstract
Abstract A method and apparatus are disclosed for calibrating a measuring device, such as a displacement transducer (98), which measures the position of a movable member 100, where the member has a limiting position. The method comprises the steps of monitoring a limiting condition of when the member 100 reaches the limiting position or when an associated operating variable reaches a value corresponding to the limiting position of the member 100, monitoring the time during which this limiting condition continues and comparing this time with a preset time, and, if the limiting condition continues for as long as the preset time, taking a measurement of the position of the movable member 100, and using this measurement to calibrate the device.
Inventors
- 👤 Philip C. Franklin
- 👤 Alan P. Ogburn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:37
CPC Classifications
G; G01; G01D; G01D18/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
102 words
A method of calibrating a measuring device which measures the position of a movable member, the member having a limiting position, comprising the steps of monitoring a limiting condition of when the member reaches the limiting position or when an associated operating variable reaches a value corresponding to the limiting position of the member, monitoring the time during which this limiting condition continues and comparing this time with a preset time, and, if the limiting condition continues for as long as the preset time, taking a measurement of the position of the movable member, and using this measurement to calibrate the device.
Claim 2
Independent Claim
102 words
A method of calibrating a measuring device which measures the position of a movable member, the member having a limiting position, comprising the steps of monitoring a limiting condition of when the member reaches the limiting position or when an associated operating variable reaches a value corresponding to the limiting position of the member, monitoring the time during which this limiting condition continues and comparing this time with a preset time, and, if the limiting condition continues for as long as the preset time, taking a measurement of the position of the movable member, and using this measurement to calibrate the device.
Claim 3
Dependent Claim
114 words
A method as claimed in claim 1 wherein the member has a second limiting position, the member being movable between the first mentioned and second positions, comprising the steps of monitoring a second limiting condition of when the member reaches the second limiting position or when an associated operating variable reaches a value corresponding to the second limiting position of the member, monitoring the time during which the second limiting condition continues and comparing this time with a second preset time, and, if the second limiting condition continues for as long as the second preset time, taking a measurement of the position of the movable member, and using this measurement to calibrate the device.
Claim 4
Independent Claim
61 words
A method as claimed in either preceding claim further comprising the steps of taking at least one further measurement of the position of the movable member if the first limiting condition continues for as long as the first preset time, computing the average value of the measurements taken at the first position, and using this average value to calibrate the device.
Claim 5
Independent Claim
61 words
A method as claimed in any preceding claim further comprising the steps of taking at least one further measurement of the position of the movable member if the second limiting condition continues for as long as the second preset time, computing the average value of the measurements taken at the second position, and using this average value to calibrate the device.
Claim 6
Independent Claim
65 words
A method as claimed in any preceding claim further comprising the steps of comparing the time during which the first and/or second limiting conditions continue with a further preset time and, if the first and/or second limiting conditions continue for as long as the further preset time, taking another measurement of the position of the movable member, and using this measurement to calibrate the device.
Claim 7
Independent Claim
60 words
A method as claimed in any preceding claim in the case where an associated operating variable is monitored, further comprising the steps of detecting whether the movable member has reached the first and/or second limiting position within a certain time after commencement of the respective limiting condition, and, if the movable member has not done so, issuing a fail signal.
Claim 8
Dependent Claim
53 words
A method as claimed in claim 6 comprising at least one further step of detecting whether the movable member has reached the first and/or second limiting position after a further or additional further predetermined time after the first detection, and, if the movable member has not done so, issuing a further fail signal.
Claim 9
Dependent Claim
117 words
A controller for a measuring device which measures the position of a movable member, the member having a limiting position, the controller comprising means for monitoring a limiting condition of when the member reaches the limiting position or when an associated operating variable reaches a value corresponding to the limiting position of the member, timing means for monitoring the time during which the limiting condition continues, comparing this time with a preset time and generating a signal if the limiting condition continues for as long as the preset time, the controller being arranged to take a measurement of the position of the movable member upon generation of the signal and to calibrate the device using this measurement.
Claim 10
Dependent Claim
117 words
A controller for a measuring device which measures the position of a movable member, the member having a limiting position, the controller comprising means for monitoring a limiting condition of when the member reaches the limiting position or when an associated operating variable reaches a value corresponding to the limiting position of the member, timing means for monitoring the time during which the limiting condition continues, comparing this time with a preset time and generating a signal if the limiting condition continues for as long as the preset time, the controller being arranged to take a measurement of the position of the movable member upon generation of the signal and to calibrate the device using this measurement.
References Cited (Backward Citations)
No citation records indexed.
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