FR2226894A5 - Automatic system for reading instrument graduations - uses cathode ray tube for conversion to electrical signals - Google Patents
Automatic system for reading instrument graduations - uses cathode ray tube for conversion to electrical signalsInfo
- Publication number
- FR2226894A5 FR2226894A5 FR7312228A FR7312228A FR2226894A5 FR 2226894 A5 FR2226894 A5 FR 2226894A5 FR 7312228 A FR7312228 A FR 7312228A FR 7312228 A FR7312228 A FR 7312228A FR 2226894 A5 FR2226894 A5 FR 2226894A5
- Authority
- FR
- France
- Prior art keywords
- graduations
- ray tube
- cathode ray
- conversion
- electrical signals
- 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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
- G01R17/02—Arrangements in which the value to be measured is automatically compared with a reference value
- G01R17/04—Arrangements in which the value to be measured is automatically compared with a reference value in which the reference value is continuously or periodically swept over the range of values to be measured
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Television Scanning (AREA)
Abstract
When necessary to convert the indications of graduations on instruments, normally observed by eye, into electric signals which can be either analogue or digital signals, a cathode ray tube is used which is sensitive to light and on which the circular or elliptical image of the projected graduations is first of all centred by commands, in stages, of the deflection of the ray on different lines by evaluation of the video signal. When this position is achieved the projection of the index pointer is then measured with respect to the graduations. Successive stages of deviation of the ray on different lines are engaged automatically by comparing the video signal with pre-set criteria.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7312228A FR2226894A5 (en) | 1973-04-02 | 1973-04-02 | Automatic system for reading instrument graduations - uses cathode ray tube for conversion to electrical signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7312228A FR2226894A5 (en) | 1973-04-02 | 1973-04-02 | Automatic system for reading instrument graduations - uses cathode ray tube for conversion to electrical signals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2226894A5 true FR2226894A5 (en) | 1974-11-15 |
Family
ID=9117434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7312228A Expired FR2226894A5 (en) | 1973-04-02 | 1973-04-02 | Automatic system for reading instrument graduations - uses cathode ray tube for conversion to electrical signals |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2226894A5 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112560839A (en) * | 2020-12-02 | 2021-03-26 | 随锐科技集团股份有限公司 | Automatic identification method and system for reading of pointer instrument |
-
1973
- 1973-04-02 FR FR7312228A patent/FR2226894A5/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112560839A (en) * | 2020-12-02 | 2021-03-26 | 随锐科技集团股份有限公司 | Automatic identification method and system for reading of pointer instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |