GB1289210A - - Google Patents
Info
- Publication number
- GB1289210A GB1289210A GB1289210DA GB1289210A GB 1289210 A GB1289210 A GB 1289210A GB 1289210D A GB1289210D A GB 1289210DA GB 1289210 A GB1289210 A GB 1289210A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- amplifier
- revolution
- transistor
- meter
- 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
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/486—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by photo-electric detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
Abstract
1289210 Photo-electric frequency measurement LUMENITION Ltd 5 Nov 1970 52775/70 Addition to 1217743 Heading G1A [Also in Division G4] The parent Specification for measuring reciprocations, oscillations, rate of revolution or amount of revolution of a shaft carrying an opaque element between a light source and a photosensitive member is modified in that the output of the photo-sensitive member is fed to an amplifier. In the embodiment of Fig.1 (not shown) the output from the photo-transistor (18) is applied via a three stage amplifier (28, 30, 32) to a meter or counter as in the parent Specification. In the embodiment of Fig. 2 the photo-transistor is replaced by a Darlington pair 38, 40 connected via diodes 44, 46 and amplifier 28, 30 to a meter 58 to give a reading of the rate of rotation of the shaft. A Zener diode 26 is connected across the light source and photo-sensitive member to ensure a stabilized supply. The opaque element of the parent case may be replaced by an opaque disc having a V-shaped slit, Fig. 3 (not shown). Alternatively the disc may have a cut-out portion extending over 180 degrees, Fig.4 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5277570 | 1970-11-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1289210A true GB1289210A (en) | 1972-09-13 |
Family
ID=10465251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1289210D Expired GB1289210A (en) | 1970-11-05 | 1970-11-05 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1289210A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172399A (en) * | 1985-03-12 | 1986-09-17 | Eg Technology Limited | Device for converting cyclic motion into digital output |
-
1970
- 1970-11-05 GB GB1289210D patent/GB1289210A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2172399A (en) * | 1985-03-12 | 1986-09-17 | Eg Technology Limited | Device for converting cyclic motion into digital output |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |