JPS6130170Y2 - - Google Patents
Info
- Publication number
- JPS6130170Y2 JPS6130170Y2 JP1981129003U JP12900381U JPS6130170Y2 JP S6130170 Y2 JPS6130170 Y2 JP S6130170Y2 JP 1981129003 U JP1981129003 U JP 1981129003U JP 12900381 U JP12900381 U JP 12900381U JP S6130170 Y2 JPS6130170 Y2 JP S6130170Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical
- signals
- transmitted
- optical fiber
- 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
- 230000003287 optical effect Effects 0.000 claims description 30
- 239000013307 optical fiber Substances 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000008054 signal transmission Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000012369 In process control Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010965 in-process control Methods 0.000 description 1
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
- Optical Transform (AREA)
Description
【考案の詳細な説明】
この考案は、光信号の受光して測定指示や空気
圧信号に変換する光応動装置に関する。[Detailed Description of the Invention] This invention relates to a photoresponsive device that receives an optical signal and converts it into a measurement instruction or an air pressure signal.
従来、プロセス制御システムにおける測定指示
計ないしは調節弁への信号伝送には、電気信号又
は空気信号が使用されている。しかして、電気信
号伝送は電気エネルギーを送るので本質安全防爆
計装には適さず、各種の安全バリヤを必要とする
上にノイズの混入が問題になる等の欠点を有す
る。また、空気信号伝送は信号の伝送に遅れがあ
る上に、計装が空気配管でコンピユータとの接続
も煩雑で、大規模計装には適さないといつた欠点
をもつている。よつて、この考案の目的は上述の
如き欠点のない光応動装置を提供することにあ
る。 Traditionally, electrical or pneumatic signals are used to transmit signals to measurement indicators or control valves in process control systems. However, since electrical signal transmission sends electrical energy, it is not suitable for intrinsically safe explosion-proof instrumentation, and has drawbacks such as requiring various safety barriers and causing noise intrusion. Furthermore, pneumatic signal transmission has the drawbacks that there is a delay in signal transmission, and the instrumentation is air piping and the connection to the computer is complicated, making it unsuitable for large-scale instrumentation. Therefore, the object of this invention is to provide a photoresponsive device that does not have the above-mentioned drawbacks.
以下にこの考案を説明する。 This idea will be explained below.
この考案は光信号を受光して測定指示や空気圧
信号に変換する光応動装置に関し、光信号を伝送
する光フアイバと、この光フアイバの終端部から
の照射光を受光する光電変換手段と、この光電変
換手段で光電変換された電気信号を印加される圧
電部材とを設け、光信号に対応した機械的変形を
圧電部材から得るようにしたものである。 This invention relates to a photoresponsive device that receives optical signals and converts them into measurement instructions and air pressure signals, and includes an optical fiber that transmits the optical signals, a photoelectric conversion means that receives the irradiated light from the end of the optical fiber, and A piezoelectric member is provided to which an electric signal photoelectrically converted by a photoelectric conversion means is applied, and mechanical deformation corresponding to the optical signal is obtained from the piezoelectric member.
第１図はこの考案の一実施例を示すものであ
り、伝送された光信号S1及びS2に応動する指示計
を構成した例を示している。すなわち、光信号S1
及びS2は光フアイバ１及び２で伝送され、それら
終端部からの照射光が光電変換手段としての太陽
電池３及び４に与えられるようになつている。ま
た、太陽電池３及び４の一端は圧電セラミツク等
の圧電部材５及び６に接続され、他端は板状の作
動レバー７に接続されており、この作動レバー７
はベース８に支持されている。さらに、作動レバ
ー７の頂部にはリンク機構９が結合されており、
作動レバー７の変形がリンク機構９に結合された
指針１０を介して目盛１１で指示されるようにな
つている。なお、圧電部材５及び６は、その変形
が作動レバー７に伝達されるように作動レバー７
の両側に固着されている。 FIG. 1 shows an embodiment of this invention, and shows an example of an indicator that responds to transmitted optical signals S1 and S2 . That is, the optical signal S 1
and S 2 are transmitted through optical fibers 1 and 2, and the irradiated light from their terminal ends is applied to solar cells 3 and 4 as photoelectric conversion means. Further, one end of the solar cells 3 and 4 is connected to piezoelectric members 5 and 6 such as piezoelectric ceramics, and the other end is connected to a plate-shaped actuation lever 7.
is supported by the base 8. Furthermore, a link mechanism 9 is coupled to the top of the operating lever 7,
The deformation of the actuating lever 7 is indicated by a scale 11 via a pointer 10 connected to a link mechanism 9. Note that the piezoelectric members 5 and 6 are connected to the actuating lever 7 so that the deformation thereof is transmitted to the actuating lever 7.
is fixed on both sides.
このような構成において、第２図Ａ，Ｂに示す
ようなデユーテイ比t1／Ｔ及びt2／Ｔで、かつ互
いに差動的に変化する光のパルス幅信号S1及びS2
が光フアイバ１及び２を経て伝送されて来るもの
とする。しかして、これら光信号S1及びS2は光フ
アイバ１及び２の終端部から太陽電池３及び４に
照射され、太陽電池３及び４からは受光した光信
号S1及びS2のパルス幅に対応した電気信号が出力
され、これが圧電部材５及び６に印加される。こ
こに、圧電部材５及び６は印加される電気信号に
対応して変形するが、その変形の程度は太陽電池
３及び４に照射される光パルス幅信号S1及びS2の
デユーテイ比に対応している。かくして、作動レ
バー７は光信号S1及びS2のデユーテイ比t1／Ｔ及
びt2／Ｔの差に対応して変形することになり、作
動レバー７の変位はリンク機構９を介して指針１
０を駆動する。そして、指針１０の変位位置を目
盛１１で読取ることにより、伝送された光信号の
大きさを知ることができる。 In such a configuration, optical pulse width signals S 1 and S 2 that have duty ratios t 1 /T and t 2 /T and that vary differentially with respect to each other as shown in FIGS. 2A and 2B are used.
It is assumed that the signals are transmitted via optical fibers 1 and 2. These optical signals S 1 and S 2 are irradiated from the terminal ends of optical fibers 1 and 2 to solar cells 3 and 4, and from the solar cells 3 and 4, the pulse width of the received optical signals S 1 and S 2 is A corresponding electrical signal is output, which is applied to the piezoelectric members 5 and 6. Here, the piezoelectric members 5 and 6 deform in response to the applied electric signals, and the degree of deformation corresponds to the duty ratio of the optical pulse width signals S 1 and S 2 irradiated to the solar cells 3 and 4. are doing. In this way, the actuating lever 7 deforms in response to the difference in the duty ratios t 1 /T and t 2 /T of the optical signals S 1 and S 2 , and the displacement of the actuating lever 7 is controlled by the indicator via the link mechanism 9. 1
Drive 0. By reading the displacement position of the pointer 10 on the scale 11, the magnitude of the transmitted optical signal can be determined.
以上のようにこの考案によれば、信号伝送に光
を用いているので本質安全防爆計装に適すると共
に、各種の安全バリヤを必要としないといつた利
点を有し、ノイズが混入せず、信号伝送に遅れが
ない等の利点も有する。 As described above, this invention uses light for signal transmission, so it is suitable for intrinsically safe explosion-proof instrumentation, and has the advantage of not requiring various safety barriers, and does not introduce noise. It also has advantages such as no delay in signal transmission.
一方、第３図はこの考案の他の応用例を示し、
伝送された光信号に対応する空気圧信号を得る光
信号・空気圧信号変換器を構成したものである。
すなわち、伝送されて来る光信号Ｓはデユーテイ
比が互いに変化する光のパルス幅信号S1，S2を含
み、光信号S1は波長λ１，光信号S2は波長λ２と
互いにその波長を異にしている。しかして、この
光信号Ｓ（S1，S2）は光フアイバ１３を介して伝
送されると共に、分岐後は光フアイバ１及び２を
介して伝送され、波長λ１の光信号S1のみを通す
フイルタ１４、波長λ２の光信号S2のみを通すフ
イルタ１５を経てそれぞれ太陽電池３，４に照射
される。そして、作動レバー７の変位は、この作
動レバー７と作動レバー７の頂部の側面に面した
ノズル１６とで構成されるノズルフラツパ機構に
よつて検出されると共に、ノズル１６の背圧はパ
イロツトリレー１７によつて増幅されて後空気圧
出力信号P0として出力され、更にフイードバツク
用のベローズ１８に印加されることによつて作動
レバー７が力平衡される。このような動作によつ
て、空気圧出力信号P0は光信号S1，S2のデユーテ
イ比の差に正確に対応したものとなる。なお、こ
の光信号・空気圧信号変換器は、互いに差動的に
そのデユーテイ比が変化する２つの光信号S1，S2
の波長を異ならしめて伝送するので、１本の光フ
アイバ１３で２種の光信号S1，S2を伝送すること
ができる利点を有している。また、空気圧出力信
号P0を利用して力平衡動作を行なうようにしてい
るので、ノズルフラツパ機構やパイロツトリレー
１７等の特性変化の影響を受けることもない。 On the other hand, Figure 3 shows another application example of this invention.
This is an optical signal/pneumatic signal converter that obtains a pneumatic signal corresponding to a transmitted optical signal.
That is, the transmitted optical signal S includes optical pulse width signals S 1 and S 2 whose duty ratios change each other, and the optical signal S 1 has a wavelength λ 1 and the optical signal S 2 has a wavelength λ 2 . are different. Therefore, this optical signal S (S 1 , S 2 ) is transmitted via the optical fiber 13, and after branching, is transmitted via the optical fibers 1 and 2, and only the optical signal S 1 with the wavelength λ 1 is transmitted. The light passes through a filter 14 that allows the light to pass through, and a filter 15 that allows only the light signal S2 of wavelength λ2 to pass through, and is irradiated onto the solar cells 3 and 4, respectively. The displacement of the actuating lever 7 is detected by a nozzle flapper mechanism composed of the actuating lever 7 and a nozzle 16 facing the side surface of the top of the actuating lever 7, and the back pressure of the nozzle 16 is detected by a pilot relay 17. The signal is amplified and outputted as a rear pneumatic pressure output signal P0 , which is further applied to the feedback bellows 18 to balance the force of the actuating lever 7. Through such an operation, the pneumatic output signal P 0 accurately corresponds to the difference in duty ratio between the optical signals S 1 and S 2 . Note that this optical signal/pneumatic signal converter converts two optical signals S 1 and S 2 whose duty ratio changes differentially with respect to each other.
Since the signals are transmitted at different wavelengths, it has the advantage that two types of optical signals S 1 and S 2 can be transmitted using one optical fiber 13. Further, since the force balancing operation is performed using the air pressure output signal P0 , it is not affected by changes in the characteristics of the nozzle flapper mechanism, pilot relay 17, etc.
さらに、第４図に示す実施例は、調節計２０か
ら光フアイバ２１を介して伝送される一種類の光
パルス幅信号S0を受光するようにしたもので、こ
の光パルス幅信号S0が太陽電池３に照射されるよ
うになつている。しかして、ノズル１６及びベロ
ーズ１８の動作は上述の第３図の場合と同様であ
り、パイロツトリレー１７の空気圧出力信号P0は
光信号S0のパルス幅に対応し、これがバルブ２２
を駆動するようになつている。かくして、この装
置は調節計２０からの出力を光パルス幅信号S0に
変換することによつて、公知の調節計出力で動作
するバルブアクチユエータを構成することができ
る利点を有し、操作端側に電気信号を伝送するも
のではないから本質安全防爆性からも有効であ
る。なお、作動レバー７を力平衡させるためにバ
ルブ２２のステム２３の変位を偏心カム等に伝
え、作動レバー７にフイードバツクするようにし
ても良く、作動レバー７の変位又は力を利用して
指針やノイズフラツパを駆動する他、スイツチの
駆動などを行なうようにしても良い。また、伝送
される光信号は光の強弱（振幅）信号であつても
良いが、太陽電池３や圧電部材５等の特性のバラ
ツキを補償するためにはデユーテイ比で駆動する
方が一層好ましい。 Furthermore, the embodiment shown in FIG. 4 is configured to receive one type of optical pulse width signal S 0 transmitted from the controller 20 via the optical fiber 21, and this optical pulse width signal S 0 is The solar cell 3 is now irradiated with light. Therefore, the operation of the nozzle 16 and the bellows 18 is the same as in the case of FIG.
It is becoming more and more like driving. Thus, this device has the advantage that by converting the output from the controller 20 into an optical pulse width signal S0 , a valve actuator can be configured to operate with a known controller output, and the operation Since it does not transmit electrical signals to the end side, it is also effective from the standpoint of intrinsic safety and explosion-proofness. In addition, in order to balance the force of the operating lever 7, the displacement of the stem 23 of the valve 22 may be transmitted to an eccentric cam or the like to provide feedback to the operating lever 7, and the displacement or force of the operating lever 7 may be used to adjust the pointer or the like. In addition to driving the noise flapper, it may also be possible to drive a switch. Further, the transmitted optical signal may be a light intensity (amplitude) signal, but in order to compensate for variations in the characteristics of the solar cell 3, piezoelectric member 5, etc., it is more preferable to drive with a duty ratio.
第１図はこの考案の一実施例を示す構成図、第
２図Ａ，Ｂは入力される光信号の波形例を示すタ
イムチヤート、第３図及び第４図はそれぞれこの
考案の他の実施例を示す構成図である。
１，２，１３，２１……光フアイバ、３，４…
…太陽電池、５，６……圧電部材、７……作動レ
バー、８……ベース、９……リンク機構、１０…
…指針、１４，１５……フイルタ、１６……ノズ
ル、１７……パイロツトリレー、１８……ベロー
ズ。
FIG. 1 is a block diagram showing one embodiment of this invention, FIGS. 2A and B are time charts showing waveform examples of input optical signals, and FIGS. 3 and 4 are other embodiments of this invention. It is a block diagram which shows an example. 1, 2, 13, 21...optical fiber, 3, 4...
...Solar cell, 5, 6... Piezoelectric member, 7... Actuation lever, 8... Base, 9... Link mechanism, 10...
... pointer, 14, 15 ... filter, 16 ... nozzle, 17 ... pilot relay, 18 ... bellows.
Claims (1)
バの終端部からの照射光を受光する光電変換手段
と、この光電変換手段で光電変換された電気信号
を印加される圧電部材とを具え、前記光信号に対
応した機械的変形を前記圧電部材から得るように
したことを特徴とする光応動装置。 It comprises an optical fiber for transmitting an optical signal, a photoelectric conversion means for receiving the irradiated light from the terminal end of the optical fiber, and a piezoelectric member to which the electric signal photoelectrically converted by the photoelectric conversion means is applied, A photoresponsive device characterized in that a mechanical deformation corresponding to a signal is obtained from the piezoelectric member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12900381U JPS5834009U (en) | 1981-08-31 | 1981-08-31 | photoresponsive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12900381U JPS5834009U (en) | 1981-08-31 | 1981-08-31 | photoresponsive device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5834009U JPS5834009U (en) | 1983-03-05 |
| JPS6130170Y2 true JPS6130170Y2 (en) | 1986-09-04 |
Family
ID=29922681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12900381U Granted JPS5834009U (en) | 1981-08-31 | 1981-08-31 | photoresponsive device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5834009U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547691B2 (en) * | 1974-09-10 | 1980-12-02 | ||
| JPS5636015A (en) * | 1979-08-31 | 1981-04-09 | Yokogawa Hokushin Electric Corp | Photoresponsive apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139306Y2 (en) * | 1978-09-25 | 1986-11-11 |
-
1981
- 1981-08-31 JP JP12900381U patent/JPS5834009U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5547691B2 (en) * | 1974-09-10 | 1980-12-02 | ||
| JPS5636015A (en) * | 1979-08-31 | 1981-04-09 | Yokogawa Hokushin Electric Corp | Photoresponsive apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5834009U (en) | 1983-03-05 |
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