GB1335866A - Apparatus for and method of measuring the horsepower of a rotating shaft - Google Patents
Apparatus for and method of measuring the horsepower of a rotating shaftInfo
- Publication number
- GB1335866A GB1335866A GB1335866DA GB1335866A GB 1335866 A GB1335866 A GB 1335866A GB 1335866D A GB1335866D A GB 1335866DA GB 1335866 A GB1335866 A GB 1335866A
- Authority
- GB
- United Kingdom
- Prior art keywords
- shaft
- pulse train
- proportional
- speed
- torque
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
- G01L3/242—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity by measuring and simultaneously multiplying torque and velocity
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
1335866 Measuring horsepower of a rotating shaft electrically TELEDYNE INDUSTRIES Inc 19 June 1971 28853/71 Heading G1N Horsepower of a rotating shaft is determined by sensing torque transmitted to the shaft and the speed of the shaft and multiplying electrically these values together. Shaft 10 connecting aircraft power plant 11 with propellor 13 is provided with spaced variable reluctance pick-ups 16, 18 producing A. C. outputs which are squared at 20, 22. If a load is put on shaft 10 a phase difference is introduced between the trains of rectangular pulses from 20, 22 proportional to the torque on the shaft. A rectangular pulse train of pulse width equal to this phase difference as derived from bistable device 24 which is triggered ON by the leading edges of pulses from one waveshaper and OFF by the leading edges from the other waveshaper, and is applied to analog gate 28 directly or via Schmitt trigger 26. Constant pulse width speed pulses from monostable multivibrator 30, triggered by pulses from one of the waveshapers, 20, 22 are integrated at 31 to produce a voltage level proportional to shaft speed which is applied to analog gate 28. The output from 28 is a pulse train of pulse width proportional to torque and height proportional to speed, the pulse areas being proportional to horsepower. Alternatively the torque pulse train may be integrated and the shaft speed pulse train used to activate the analog gate. To ensure that the pulse train from shaper 20 precedes pulse train from shaper 22 the teeth on gear 12 may be advanced ahead of the teeth on gear 14 at zero torque and the meter 34 calibrated correspondingly.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2885371 | 1971-06-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1335866A true GB1335866A (en) | 1973-10-31 |
Family
ID=10282218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1335866D Expired GB1335866A (en) | 1971-06-19 | 1971-06-19 | Apparatus for and method of measuring the horsepower of a rotating shaft |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1335866A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2262345A (en) * | 1991-12-13 | 1993-06-16 | Richard Lunn | Shaft horsepower measuring device |
EP2431720A1 (en) * | 2010-09-20 | 2012-03-21 | Eurocopter Deutschland GmbH | Method of measuring torque and torque measuring system for said method |
-
1971
- 1971-06-19 GB GB1335866D patent/GB1335866A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2262345A (en) * | 1991-12-13 | 1993-06-16 | Richard Lunn | Shaft horsepower measuring device |
EP2431720A1 (en) * | 2010-09-20 | 2012-03-21 | Eurocopter Deutschland GmbH | Method of measuring torque and torque measuring system for said method |
US8892366B2 (en) | 2010-09-20 | 2014-11-18 | Airbus Helicopters Deutschland GmbH | Method of measuring torque and torque measuring system for said method |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |