FR2503873A1 - Dispositif de mesure de distance par ultrasons pour appareil photographique - Google Patents
Dispositif de mesure de distance par ultrasons pour appareil photographique Download PDFInfo
- Publication number
- FR2503873A1 FR2503873A1 FR8206305A FR8206305A FR2503873A1 FR 2503873 A1 FR2503873 A1 FR 2503873A1 FR 8206305 A FR8206305 A FR 8206305A FR 8206305 A FR8206305 A FR 8206305A FR 2503873 A1 FR2503873 A1 FR 2503873A1
- Authority
- FR
- France
- Prior art keywords
- ultrasonic
- transformer
- ultrasonic wave
- capacitor
- oscillator
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 21
- 230000008054 signal transmission Effects 0.000 title 1
- 238000004804 winding Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 12
- 230000001105 regulatory effect Effects 0.000 description 6
- 230000010355 oscillation Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/40—Systems for automatic generation of focusing signals using time delay of the reflected waves, e.g. of ultrasonic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
- G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
- G01S15/14—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves wherein a voltage or current pulse is initiated and terminated in accordance respectively with the pulse transmission and echo reception
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optics & Photonics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Focusing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5254481U JPS57164729U (OSRAM) | 1981-04-10 | 1981-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2503873A1 true FR2503873A1 (fr) | 1982-10-15 |
Family
ID=12917724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8206305A Pending FR2503873A1 (fr) | 1981-04-10 | 1982-04-09 | Dispositif de mesure de distance par ultrasons pour appareil photographique |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS57164729U (OSRAM) |
| FR (1) | FR2503873A1 (OSRAM) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3405915A1 (de) * | 1984-02-18 | 1985-08-22 | Bayerische Motoren Werke AG, 8000 München | Schaltanordnung fuer einen ultraschall-entfernungsmesser |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1207104B (de) * | 1961-12-13 | 1965-12-16 | Siemens Ag | Elektrischer Laufzeitmesser mit Echolot zur Bunkerstandsmessung |
| FR1421455A (fr) * | 1964-10-30 | 1965-12-17 | Cie Generale D Electronique In | Circuit générateur d'impulsions |
| US4234941A (en) * | 1978-05-25 | 1980-11-18 | Coast Radar And Communications Ltd. | Verbal read-out depth sounding system |
-
1981
- 1981-04-10 JP JP5254481U patent/JPS57164729U/ja active Pending
-
1982
- 1982-04-09 FR FR8206305A patent/FR2503873A1/fr active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1207104B (de) * | 1961-12-13 | 1965-12-16 | Siemens Ag | Elektrischer Laufzeitmesser mit Echolot zur Bunkerstandsmessung |
| FR1421455A (fr) * | 1964-10-30 | 1965-12-17 | Cie Generale D Electronique In | Circuit générateur d'impulsions |
| US4234941A (en) * | 1978-05-25 | 1980-11-18 | Coast Radar And Communications Ltd. | Verbal read-out depth sounding system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3405915A1 (de) * | 1984-02-18 | 1985-08-22 | Bayerische Motoren Werke AG, 8000 München | Schaltanordnung fuer einen ultraschall-entfernungsmesser |
| EP0152895A3 (en) * | 1984-02-18 | 1986-12-30 | Bayerische Motoren Werke Aktiengesellschaft | Circuit for an ultrasonic range finder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57164729U (OSRAM) | 1982-10-18 |
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