JPH0355074Y2 - - Google Patents
Info
- Publication number
- JPH0355074Y2 JPH0355074Y2 JP1983068429U JP6842983U JPH0355074Y2 JP H0355074 Y2 JPH0355074 Y2 JP H0355074Y2 JP 1983068429 U JP1983068429 U JP 1983068429U JP 6842983 U JP6842983 U JP 6842983U JP H0355074 Y2 JPH0355074 Y2 JP H0355074Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- pressure
- reflecting mirror
- lens
- plate
- 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 18
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 9
- 231100001261 hazardous Toxicity 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Landscapes
- Optical Transform (AREA)
- Measuring Fluid Pressure (AREA)
Description
【考案の詳細な説明】
この考案は、圧力を検出する圧力センサに関
し、電磁エネルギーを一切用いず、光エネルギー
の変化量のみで圧力を検出するようにし、構造を
簡単にするとともに、耐防爆性、耐ノイズ性を高
めることを目的とする。[Detailed explanation of the invention] This invention relates to a pressure sensor that detects pressure. It detects pressure only by the amount of change in light energy without using any electromagnetic energy. This design has a simple structure and is explosion-proof. , the purpose is to improve noise resistance.
従来より使用されている圧力センサは、その検
出値を電気的エネルギーとして取り出すいわゆる
電送式を採用している。したがつて、この種圧力
センサを危険区画に用いる場合、それを防爆構造
にする必要があり、また、センサ信号取出用の電
送路の危険区画と被危険区画との接続点には本質
安全回路を用いる必要があり、さらに、前記電送
路を電力ケーブルに併設する場合には、電磁誘導
の回避のためにシールドケーブルを使用する必要
があり、かつ、構造が複雑になる欠点がある。 Pressure sensors that have been used conventionally employ a so-called electric transmission type in which the detected value is extracted as electrical energy. Therefore, when this type of pressure sensor is used in a hazardous area, it must be of explosion-proof construction, and an intrinsically safe circuit must be installed at the connection point between the hazardous area and the hazardous area of the electrical transmission line for sensor signal extraction. Moreover, when the power transmission line is installed alongside the power cable, it is necessary to use a shielded cable to avoid electromagnetic induction, and the structure becomes complicated.
この考案は、前記の点に留意してなされたもの
であり、センサ本体の一側に導入された発光側お
よび受光側の光フアイバーケーブルと、前記両ケ
ーブルのそれぞれの先端に接続され並設された発
光レンズおよび受光レンズと、前記本体の他側に
設けられ前記発光レンズからの光を反射して前記
受光レンズに案内する反射鏡と、前記反射鏡の前
面にガイド溝に沿い上下動自在に設けられた光断
路板と、前記本体の底部に設けられた受圧部と、
一側が前記受圧部に支持され他側の先端が前記光
断路板に連結され前記受圧部の圧力変化により前
記先端が上下動して前記光断路板を上下動し前記
反射鏡の受光面積を可変する変位伝達板とを備え
た圧力センサを提供するものである。 This idea was made with the above points in mind, and includes optical fiber cables on the light emitting side and the light receiving side that are introduced into one side of the sensor body, and optical fiber cables that are connected to the tips of each of the two cables and are installed in parallel. a light-emitting lens and a light-receiving lens, a reflecting mirror provided on the other side of the main body to reflect light from the light-emitting lens and guiding it to the light-receiving lens, and a front surface of the reflecting mirror that is movable up and down along a guide groove. an optical disconnection plate provided; a pressure receiving part provided at the bottom of the main body;
One side is supported by the pressure-receiving section, and the tip of the other side is connected to the optical disconnection plate, and the tip moves up and down due to pressure changes in the pressure-receiving section, thereby moving the optical disconnection plate up and down, thereby varying the light-receiving area of the reflecting mirror. The present invention provides a pressure sensor equipped with a displacement transmission plate.
したがつて、この考案の圧力センサによると、
受圧部の圧力変化により光断路板が変位し、反射
鏡の受光面積を可変することができるため、反射
鏡で反射され受光レンズで受光された光の光量が
受圧部の圧力変化により可変し、当該圧力変化に
応じた光量が正確に得られるものであり、電磁エ
ネルギーを一切用いず、光エネルギーの変化量の
みで圧力検出が行なえ、耐防爆性、耐ノイズ性に
優れた効果を得ることができ、構造がきわめて簡
単にできるものである。 Therefore, according to the pressure sensor of this invention,
The optical disconnect plate is displaced by changes in the pressure of the pressure receiving part, and the light receiving area of the reflecting mirror can be varied, so the amount of light reflected by the reflecting mirror and received by the light receiving lens can be varied by changes in the pressure of the pressure receiving part. The amount of light that corresponds to the pressure change can be accurately obtained, and pressure can be detected only by the amount of change in light energy without using any electromagnetic energy, and it has excellent explosion-proof and noise-proof properties. The structure is extremely simple.
つぎにこの考案を、その１実施例を示した図面
とともに詳細に説明する。 Next, this invention will be explained in detail with reference to drawings showing one embodiment thereof.
図面において、１は筐体上のセンサ本体、２は
センサ本体１内の右側部に配設された保持材、３
および４はセンサ本体１の右側壁を貫通して保持
材２内に導入された発光側光フアイバーケーブル
および受光側光フアイバーケーブル、５および６
は保持材２の上部中央側に保持されそれぞれの発
光面５′および受光面６′がセンサ本体１内の左側
壁に対向した発光レンズおよび受光レンズであ
り、両レンズ５，６はそれぞれ両光フアイバーケ
ーブル３，４の先端に接続されている。 In the drawing, 1 is the sensor body on the housing, 2 is the holding material disposed on the right side inside the sensor body 1, and 3 is the sensor body on the housing.
and 4 are a light-emitting side optical fiber cable and a light-receiving side optical fiber cable, 5 and 6, which penetrate the right side wall of the sensor body 1 and are introduced into the holding material 2.
are a light-emitting lens and a light-receiving lens which are held at the upper center side of the holding member 2 and whose respective light-emitting surface 5' and light-receiving surface 6' face the left wall inside the sensor body 1; It is connected to the tips of fiber cables 3 and 4.
７および８はセンサ本体１内の左側の前部およ
び後部に配設されたガイド材であり、両ガイド材
７，８のそれぞれの向い合う面に上下方向のガイ
ド溝７′，８′が形成されている。９は両ガイド材
７，８間のセンサ本体１内面、すなわちセンサ本
体１内の左側壁面に固定され両レンズ５，６のそ
れぞれの発、受光面５′，６′に向い合う反射鏡で
あり、発光レンズ５からの光が反射鏡９で反射さ
れて受光レンズ６に案内される。１０は反射鏡９
の前面、すなわち両レンズ５，６と反射鏡９との
間の反射鏡９側に上下動自在に設けられ反射鏡９
の受光面積を可変する光断路板であり、後述の変
位伝達板に連結されている。 Reference numerals 7 and 8 denote guide members disposed at the front and rear parts of the left side of the sensor body 1, and vertical guide grooves 7' and 8' are formed in the opposing surfaces of both guide members 7 and 8, respectively. has been done. Reference numeral 9 denotes a reflecting mirror that is fixed to the inner surface of the sensor body 1 between the guide members 7 and 8, that is, the left wall surface inside the sensor body 1, and faces the emission and light reception surfaces 5' and 6' of the lenses 5 and 6, respectively. The light from the light emitting lens 5 is reflected by the reflecting mirror 9 and guided to the light receiving lens 6. 10 is a reflecting mirror 9
A reflecting mirror 9 is provided on the front side of the reflecting mirror 9 between the lenses 5 and 6 and the reflecting mirror 9 so as to be movable up and down.
This is an optical disconnection plate that changes the light receiving area of the light receiving area, and is connected to a displacement transmission plate that will be described later.
１１はセンサ本体１の底壁の中心部に貫設され
た受圧部、１２は一側が受圧部１１に支持される
とともに他側の先端が光断路板１０に連結された
ほぼＵ字状の変位伝達板であり、第３図に示すよ
うに、変位伝達板１２の他側の先端にピン１２′
と光断路板１０の下端のピン１０′とをリンク１
３で連結することにより両者が連結されている。
１４は受圧部１１の上端に連通して支持され上面
が変位伝達板１２の他側に接触されたベローズで
あり、受圧部１１の圧力変化によりベローズ１４
が伸縮することにより、該圧力変化に応じた変位
が変位伝達板１２に伝えられ、これが光断路板１
０に伝達される。 Reference numeral 11 denotes a pressure receiving portion penetrating the center of the bottom wall of the sensor body 1, and reference numeral 12 indicates a substantially U-shaped displacement whose one side is supported by the pressure receiving portion 11 and the tip of the other side is connected to the optical disconnection plate 10. This is a transmission plate, and as shown in FIG.
and the pin 10' at the lower end of the optical disconnection plate 10.
Both are connected by connecting with 3.
Reference numeral 14 denotes a bellows which is supported in communication with the upper end of the pressure receiving part 11 and whose upper surface is in contact with the other side of the displacement transmitting plate 12.
By expanding and contracting, a displacement corresponding to the pressure change is transmitted to the displacement transmission plate 12, which is transmitted to the optical disconnection plate 1.
0.
そして、発光側光フアイバーケーブル３を通つ
た光を発光レンズ５によつて収束されて反射鏡９
側へ照射され、反射鏡９で反射された光は受光レ
ンズ６で受光され、これが受光側光フアイバーケ
ーブル４を通つて得られる。他方、受圧部１１に
伝えられた圧力変化はベローズ１４および変位伝
達板１２を介して光断路板１０に伝達され、たと
えば、受圧部１１の圧力が大きくなると、ベロー
ズ１４が伸張し、光断路板１０が上動して反射鏡
９の受光面積が減少し、また、受圧部１１の圧力
が小さくなると、ベローズ１４が収縮し、光断路
板１０が下動して反射鏡９の受光面積が増大し、
このため、第４図に示すように、受圧部１１の圧
力変化に応じて受光レンズ６における受光光量が
サーミスタ的変位と同様に変化し、受光側光フア
イバーケーブル４を通して得られた光エネルギー
の強度により圧力を検出することができる。 The light passing through the light-emitting side optical fiber cable 3 is converged by the light-emitting lens 5 and reflected by the reflecting mirror 9.
The light irradiated to the side and reflected by the reflecting mirror 9 is received by the light receiving lens 6, and is obtained through the light receiving side optical fiber cable 4. On the other hand, the pressure change transmitted to the pressure receiving part 11 is transmitted to the optical disconnection plate 10 via the bellows 14 and the displacement transmission plate 12. For example, when the pressure of the pressure receiving part 11 increases, the bellows 14 expands and the optical disconnection plate 10 moves up and the light receiving area of the reflecting mirror 9 decreases, and when the pressure of the pressure receiving part 11 decreases, the bellows 14 contracts and the optical disconnection plate 10 moves down and the light receiving area of the reflecting mirror 9 increases. death,
Therefore, as shown in FIG. 4, the amount of light received by the light receiving lens 6 changes in accordance with the pressure change of the pressure receiving part 11 in the same manner as the thermistor displacement, and the intensity of the light energy obtained through the light receiving side optical fiber cable 4 changes. Pressure can be detected by
したがつて、前記実施例によると、従来のよう
な電磁エネルギーを一切用いることなく、光エネ
ルギーの変化量のみで圧力を検出することができ
るため、危険区画における圧力検出に際しても、
防爆構造や本質安全回路を用いる必要がなく、ま
た、シールドケーブルも不要になるものであり、
耐防爆性、耐ノイズ性に優れた効果を得ることが
でき、しかも、受圧部１１の圧力変化をベローズ
１４および変位伝達板１２を介して光断路板１０
に伝達し、反射鏡９の受光面積を可変することの
みにより圧力変化が検出でき、構造を簡単にでき
るものである。 Therefore, according to the above embodiment, pressure can be detected only by the amount of change in optical energy without using any electromagnetic energy as in the conventional case, so even when pressure is detected in a dangerous area,
There is no need to use explosion-proof construction or intrinsically safe circuits, and there is no need for shielded cables.
Excellent explosion-proof and noise-proof effects can be obtained, and the pressure change of the pressure receiving part 11 is transferred to the optical disconnection plate 10 via the bellows 14 and the displacement transmission plate 12.
The pressure change can be detected only by transmitting light to the light receiving area of the reflecting mirror 9, and the structure can be simplified.
図面はこの考案の圧力センサの１実施例を示
し、第１図は切断正面図、第２図は切断平面図、
第３図は光断路板と変位伝達板との連結部の正面
図、第４図は圧力と受光光量との関係図である。
３，４……発光側、受光側光フアイバーケーブ
ル、５……発光レンズ、６……受光レンズ、９…
…反射鏡、１０……光断路板、１１……受圧部。
The drawings show one embodiment of the pressure sensor of this invention, FIG. 1 is a cutaway front view, FIG. 2 is a cutaway plan view,
FIG. 3 is a front view of the connecting portion between the optical disconnection plate and the displacement transmission plate, and FIG. 4 is a diagram showing the relationship between the pressure and the amount of received light. 3, 4... Light emitting side, light receiving side optical fiber cable, 5... Light emitting lens, 6... Light receiving lens, 9...
...Reflector, 10... Optical disconnection plate, 11... Pressure receiving section.
Claims (1)
光側の光フアイバーケーブルと、前記両ケーブル
のそれぞれの先端に接続され並設された発光レン
ズおよび受光レンズと、前記本体の他側に設けら
れ前記発光レンズからの光を反射して前記受光レ
ンズに案内する反射鏡と、前記反射鏡の前面にガ
イド溝に沿い上下動自在に設けられた光断路板
と、前記本体の底部に設けられた受圧部と、一側
が前記受圧部に支持され他側の先端が前記光断路
板に連結され前記受圧部の圧力変化により前記先
端が上下動して前記光断路板を上下動し前記反射
鏡の受光面積を可変する変位伝達板とを備えた圧
力センサ。 A light emitting side and a light receiving side optical fiber cable introduced into one side of the sensor body, a light emitting lens and a light receiving lens connected to the tips of each of the two cables and arranged in parallel, and a light emitting lens and a light receiving lens installed on the other side of the sensor body. a reflecting mirror that reflects light from the light emitting lens and guiding it to the light receiving lens; an optical disconnection plate provided on the front surface of the reflecting mirror so as to be movable up and down along a guide groove; and a pressure receiving plate provided at the bottom of the main body. one side is supported by the pressure receiving part and the tip of the other side is connected to the optical disconnection plate, and the tip moves up and down due to pressure changes in the pressure receiving part to move the optical disconnection plate up and down to receive light from the reflecting mirror. A pressure sensor equipped with a displacement transmission plate that changes area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6842983U JPS59172349U (en) | 1983-05-06 | 1983-05-06 | pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6842983U JPS59172349U (en) | 1983-05-06 | 1983-05-06 | pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59172349U JPS59172349U (en) | 1984-11-17 |
| JPH0355074Y2 true JPH0355074Y2 (en) | 1991-12-06 |
Family
ID=30198601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6842983U Granted JPS59172349U (en) | 1983-05-06 | 1983-05-06 | pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59172349U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122925A (en) * | 1980-02-29 | 1981-09-26 | Shimadzu Corp | Sensor |
| JPS56129830A (en) * | 1980-03-17 | 1981-10-12 | Toshiba Corp | Pressure measuring apparatus |
| JPS574733B2 (en) * | 1978-08-17 | 1982-01-27 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6020024Y2 (en) * | 1980-06-11 | 1985-06-15 | 株式会社日立製作所 | Optical pressure measuring device |
-
1983
- 1983-05-06 JP JP6842983U patent/JPS59172349U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS574733B2 (en) * | 1978-08-17 | 1982-01-27 | ||
| JPS56122925A (en) * | 1980-02-29 | 1981-09-26 | Shimadzu Corp | Sensor |
| JPS56129830A (en) * | 1980-03-17 | 1981-10-12 | Toshiba Corp | Pressure measuring apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59172349U (en) | 1984-11-17 |
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