JPS57192815A - Distance detecting device - Google Patents
Distance detecting deviceInfo
- Publication number
- JPS57192815A JPS57192815A JP6999581A JP6999581A JPS57192815A JP S57192815 A JPS57192815 A JP S57192815A JP 6999581 A JP6999581 A JP 6999581A JP 6999581 A JP6999581 A JP 6999581A JP S57192815 A JPS57192815 A JP S57192815A
- Authority
- JP
- Japan
- Prior art keywords
- current
- output
- detector
- transistor
- operation amplifier
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C3/00—Measuring distances in line of sight; Optical rangefinders
- G01C3/02—Details
- G01C3/06—Use of electric means to obtain final indication
- G01C3/08—Use of electric radiation detectors
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Measurement Of Optical Distance (AREA)
- Focusing (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
PURPOSE:To obtain a stable distance detector by removing defects caused by the characteristics of transistors in first and second detecting circuits which logarithmically convert only the varying part of the current output of a semiconductor optical position detector due to pulsed light. CONSTITUTION:The current output IL1 of the semiconductor optical position detector 5 is logarithmically converted through a logarithmically compressing transistor Tr1 in a logatithm conversion part LA1 comprising the transistor Tr1 and an operation amplifier OA1. The same current as the current IL1 is flowed from a power source + Vcc through a FET (FT1) and expanded by an expanding transistor Tr3. When the pulsed light is emitted, a switch SW2 is opened, SW3 is closed, the current variation DELTAIL1 is supplied to the Tr3 from the operation amplifier OA5, and an output VO1 is obtained. Likewise, an output VO2 is obtained from a second detector. Both outputs are inputted to an operation amplifier, and the current ratio corresponding to the distance is obtained from the difference in the output and inputted to a sample and hold circuit SH as a voltage. Therefore the stable distance detector can be obtained.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6999581A JPS57192815A (en) | 1981-05-09 | 1981-05-09 | Distance detecting device |
| DE19823216246 DE3216246A1 (en) | 1981-05-01 | 1982-04-30 | DISTANCE MEASURING DEVICE |
| US06/717,604 US4601574A (en) | 1981-05-01 | 1985-04-01 | Distance measuring apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6999581A JPS57192815A (en) | 1981-05-09 | 1981-05-09 | Distance detecting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57192815A true JPS57192815A (en) | 1982-11-27 |
| JPS6234082B2 JPS6234082B2 (en) | 1987-07-24 |
Family
ID=13418760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6999581A Granted JPS57192815A (en) | 1981-05-01 | 1981-05-09 | Distance detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57192815A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60135812A (en) * | 1983-12-19 | 1985-07-19 | ザ・バブコツク・アンド・ウイルコツクス・カンパニー | Device for measuring pitch between adjacent rod in nuclear fuel aggregate |
-
1981
- 1981-05-09 JP JP6999581A patent/JPS57192815A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60135812A (en) * | 1983-12-19 | 1985-07-19 | ザ・バブコツク・アンド・ウイルコツクス・カンパニー | Device for measuring pitch between adjacent rod in nuclear fuel aggregate |
| JPH045325B2 (en) * | 1983-12-19 | 1992-01-31 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234082B2 (en) | 1987-07-24 |
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