GB1079409A - Phase sensitive demodulator - Google Patents
Phase sensitive demodulatorInfo
- Publication number
- GB1079409A GB1079409A GB4052864D GB4052864D GB1079409A GB 1079409 A GB1079409 A GB 1079409A GB 4052864 D GB4052864 D GB 4052864D GB 4052864 D GB4052864 D GB 4052864D GB 1079409 A GB1079409 A GB 1079409A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photo
- voltage
- phase
- phase sensitive
- diodes
- 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
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
- G01M1/16—Determining unbalance by oscillating or rotating the body to be tested
- G01M1/22—Determining unbalance by oscillating or rotating the body to be tested and converting vibrations due to unbalance into electric variables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Balance (AREA)
Abstract
1,079,409. Phase sensitive rectifiers. LOSENHAUSENWERK DUSSELDORFER MASCHINENBAU A.G. Oct. 5, 1964, No. 40528/64. Heading H3A. [Also in Division G1] A phase sensitive demodulator for a balancing machine comprises a voltage divider formed by a fixed resistor 12 and a photo-resistor, preferably a pair of oppositely poled photo-diodes 13, 14. An alternating " unbalance " measuring voltage Ue, derived e.g. from a transducer responsive to vibrations of a bearing of the machine, is applied across the divider and the photo-resistors are illuminated by a source 16 periodically obturated at 17 at the frequency of rotation of the body under test (preferably during one half of each rotation of the body). The voltage across the photo-diodes after filtering at 18, 19 thus produces an output direct voltage Ua of magnitude and polarity corresponding to the magnitude x cos # and phase sense of the measuring voltage Ue relative to the phase # of the chopper action at 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4052864D GB1079409A (en) | 1964-10-05 | 1964-10-05 | Phase sensitive demodulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4052864D GB1079409A (en) | 1964-10-05 | 1964-10-05 | Phase sensitive demodulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1079409A true GB1079409A (en) | 1967-08-16 |
Family
ID=10415349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4052864D Expired GB1079409A (en) | 1964-10-05 | 1964-10-05 | Phase sensitive demodulator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1079409A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005088269A1 (en) | 2004-03-15 | 2005-09-22 | Anca Pty Ltd | Computation of imbalance in rotatably mounted object in a motion control system |
-
1964
- 1964-10-05 GB GB4052864D patent/GB1079409A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005088269A1 (en) | 2004-03-15 | 2005-09-22 | Anca Pty Ltd | Computation of imbalance in rotatably mounted object in a motion control system |
| EP1725850A1 (en) * | 2004-03-15 | 2006-11-29 | Anca Pty. Ltd. | Computation of imbalance in rotatably mounted object in a motion control system |
| EP1725850A4 (en) * | 2004-03-15 | 2011-01-05 | Anca Pty Ltd | Computation of imbalance in rotatably mounted object in a motion control system |
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