JPS63159728U - - Google Patents
Info
- Publication number
- JPS63159728U JPS63159728U JP5218787U JP5218787U JPS63159728U JP S63159728 U JPS63159728 U JP S63159728U JP 5218787 U JP5218787 U JP 5218787U JP 5218787 U JP5218787 U JP 5218787U JP S63159728 U JPS63159728 U JP S63159728U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- laser
- optical fiber
- fiber cable
- vibrating object
- 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
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Description
第１図はこの考案の一実施例を示す振動計の構
成図、第２図は従来の振動計の構成図である。
図中、１３ａ，１３ｂは光フアイバケーブル、
１４は光コネクタ、１５はコリメータレンズ、１
６は穴アキミラー、１７はケースである。なお、
図中同一符号は同一または相当部分を示す。
FIG. 1 is a block diagram of a vibration meter showing an embodiment of this invention, and FIG. 2 is a block diagram of a conventional vibration meter. In the figure, 13a and 13b are optical fiber cables,
14 is an optical connector, 15 is a collimator lens, 1
6 is a mirror with holes, and 17 is a case. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.
Claims (1)
出力ビームを２分割する第１のビームスプリツタ
と、上記２分割したレーザビームの一方のレーザ
周波数を特定の周波数だけシフトする手段と、上
記周波数シフトされたレーザビームを伝送する光
フアイバケーブルと、上記光フアイバケーブルの
出射レーザビームを平行にして振動物体にその振
動方向に平行に照射し得るコリメータレーズと、
振動物体の振動速度に応じてドツプラシフトを起
した散乱光を上記照射ビームと同軸に集光し得る
ミラーおよび集光レンズと、上記集光レンズで受
信したドツプラ信号を含む散乱光を伝送する光フ
アイバケーブルと、上記光フアイバケーブルによ
り伝送された散乱光と上記第１のビームスプリツ
タで分割された他方の周波数シフトを受けないレ
ーザビームとを混合する第２のビームスプリツタ
と、上記混合された光を電気変換する光検出器と
、上記光検出器の出力を増幅する増幅器と、上記
増幅器の出力信号からドツプラ周波数を検出する
周波数追跡器と、上記周波数追跡器の出力信号で
あるドツプラ周波数から振動物体の振動速度に比
例したアナログ電圧を出力し得る周波数−電圧変
換器とを備えたことを特徴とする振動計。 a laser that outputs a specific wavelength, a first beam splitter that splits the output beam of the laser into two, means for shifting the laser frequency of one of the two split laser beams by a specific frequency, and the frequency shifter. an optical fiber cable that transmits the laser beam emitted from the optical fiber cable, and a collimator laser that can make the emitted laser beam of the optical fiber cable parallel and irradiate the vibrating object parallel to the vibration direction of the vibrating object;
A mirror and a condensing lens capable of condensing the scattered light that has undergone a Doppler shift in accordance with the vibration speed of the vibrating object on the same axis as the irradiation beam, and an optical fiber that transmits the scattered light including the Doppler signal received by the condensing lens. a second beam splitter that mixes the scattered light transmitted by the optical fiber cable and the other laser beam that is not frequency shifted and that is split by the first beam splitter; A photodetector that converts light into electricity, an amplifier that amplifies the output of the photodetector, a frequency tracker that detects a Doppler frequency from the output signal of the amplifier, and a Doppler frequency that is the output signal of the frequency tracker. A vibration meter comprising: a frequency-voltage converter capable of outputting an analog voltage proportional to the vibration speed of a vibrating object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218787U JPH0532739Y2 (en) | 1987-04-07 | 1987-04-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5218787U JPH0532739Y2 (en) | 1987-04-07 | 1987-04-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63159728U true JPS63159728U (en) | 1988-10-19 |
| JPH0532739Y2 JPH0532739Y2 (en) | 1993-08-20 |
Family
ID=30877139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5218787U Expired - Lifetime JPH0532739Y2 (en) | 1987-04-07 | 1987-04-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0532739Y2 (en) |
-
1987
- 1987-04-07 JP JP5218787U patent/JPH0532739Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0532739Y2 (en) | 1993-08-20 |
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