JPS641732B2 - - Google Patents
Info
- Publication number
- JPS641732B2 JPS641732B2 JP618183A JP618183A JPS641732B2 JP S641732 B2 JPS641732 B2 JP S641732B2 JP 618183 A JP618183 A JP 618183A JP 618183 A JP618183 A JP 618183A JP S641732 B2 JPS641732 B2 JP S641732B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- heat
- temperature
- shielding plate
- sensitive members
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 239000013307 optical fiber Substances 0.000 claims description 9
- 230000004907 flux Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000002360 explosive Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000925 Cd alloy Inorganic materials 0.000 description 1
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017773 Cu-Zn-Al Inorganic materials 0.000 description 1
- 229910017767 Cu—Al Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
- Fire-Detection Mechanisms (AREA)
Description
【発明の詳細な説明】
本発明は温度変化検出装置に係り、特には火災
などの急激な温度変化を検知する検出装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temperature change detection device, and more particularly to a detection device for detecting sudden temperature changes such as those caused by fire.
火災のように、周囲の温度が急激に変化する場
合に適用される温度変化検出装置には、従来、サ
ーミスタなどを感温素子としたものがある。この
ような装置では、感温素子からの微小出力を扱う
ため、ノイズがその微小出力に重量した場合には
誤動作を生じやすい。また、このような装置で
は、水中や爆発性ガス雰囲気中に設置される場合
には防水や防爆の構造にしなければならず製造コ
ストが高くなる。 2. Description of the Related Art Temperature change detection devices used in cases where the ambient temperature suddenly changes, such as in the case of a fire, have conventionally used a thermistor or the like as a temperature sensing element. Since such devices handle minute outputs from the temperature sensing elements, malfunctions are likely to occur if noise adds to the minute outputs. Furthermore, when such a device is installed underwater or in an explosive gas atmosphere, it must be constructed to be waterproof and explosion-proof, which increases manufacturing costs.
本発明は、ノイズなどの影響を受けることなく
常に正確に温度変化を検出することができるとと
もに、製造コストが安価な温度変化検出装置を提
供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature change detection device that can always accurately detect temperature changes without being affected by noise and the like and is inexpensive to manufacture.
以下、本発明を図面に示す実施例に基づいて説
明する。 Hereinafter, the present invention will be explained based on embodiments shown in the drawings.
図において温度変化検出装置１は、光伝送部２
と、該光伝送部２に形成される光束３を遮光する
遮光部４とを備える。 In the figure, a temperature change detection device 1 includes an optical transmission section 2
and a light shielding section 4 that shields the light beam 3 formed in the light transmission section 2.
光伝送部２は、光源５の投光を導く投光用光フ
アイバ６と、該投光用光フアイバ６と間隔を存し
て対設され、受光器７に受光を導く受光用光フア
イバ８を及び両光フアイバ６，８間に設けられた
対をなす集光レンズ９，１０とより構成される。
そして一方のレンズ９により平行する光束３が形
成され、他方のレンズ１０により集光せしめる。 The optical transmission section 2 includes a light projecting optical fiber 6 that guides the light emitted from the light source 5, and a light receiving optical fiber 8 that is disposed opposite to the light projecting optical fiber 6 with a space therebetween and guides the received light to the light receiver 7. and a pair of condensing lenses 9 and 10 provided between both optical fibers 6 and 8.
A parallel light beam 3 is formed by one lens 9 and condensed by the other lens 10.
遮光部４は、上記光束３中に突出される遮光板
１１と、該遮光板１１の両側にそれぞれ一端が取
付けられるコイル状の感熱部材１２，１３とを主
体として構成される。但し１４，１５は上記感熱
部材１２，１３のそれぞれの他端を取付ける取付
板である。 The light shielding section 4 mainly includes a light shielding plate 11 that projects into the light beam 3, and coil-shaped heat-sensitive members 12 and 13, one end of which is attached to each side of the light shielding plate 11. However, reference numerals 14 and 15 are mounting plates to which the other ends of the heat-sensitive members 12 and 13 are mounted.
感熱部材１２，１３は形状記憶合金を以て構成
される。該形状記憶合金とは、ある変態温度以下
では塑性変形が可能であり、該変態温度以上に加
熱することによつて変形前の形状に復元する合金
をいう。該形状記憶合金としては一般にCu−Zn
−Al合金、Au−Cd合金、In−Al合金、Cu−Al
−Ni合金，Cu−Zn−Al合金等が使用される。こ
れらの合金は、所定の形状記憶熱処理により所定
形状を記憶せしめた後は、常温における塑形変形
はきわめて容易であると共に、変態温度以上に加
熱されたとき、記憶された元の形状へ急速に復元
し、かつその復元力は上記変形に要する力に比し
きわめて大きい特徴を有するものである。 The heat sensitive members 12 and 13 are made of shape memory alloy. The shape memory alloy is an alloy that can be plastically deformed below a certain transformation temperature, and returns to its pre-deformed shape by heating above the transformation temperature. The shape memory alloy is generally Cu-Zn.
-Al alloy, Au-Cd alloy, In-Al alloy, Cu-Al
-Ni alloy, Cu-Zn-Al alloy, etc. are used. After these alloys are made to memorize a predetermined shape by a predetermined shape memory heat treatment, they are extremely easy to plastically deform at room temperature, and when heated above the transformation temperature, they rapidly return to the memorized original shape. It is characterized by being able to restore itself, and its restoring force being extremely large compared to the force required for the above-mentioned deformation.
上記感熱部材１２，１３は、例えばCu−Zn−
Al合金の形状記憶合金を用い、同一形状の密着
コイル状に記憶形成する。そして両感熱部材１
２，１３は、略同一の変態温度、かつ同一の復元
力を有するように選択される。 The heat sensitive members 12 and 13 are, for example, Cu-Zn-
Using an Al alloy shape memory alloy, the memory is formed into a tightly coiled coil having the same shape. and both heat sensitive members 1
2 and 13 are selected to have substantially the same transformation temperature and the same restoring force.
上記構成において、例えば本発明の温度変化検
出装置１を室内火災探知器として使用する場合に
ついて説明する。先づ取付けに当つては、光源５
及び受光器７は該室内より離間した適所に設け、
光束３の形成部は該室の天井裏等に設け、一方の
取付板１４を天井１６から室内に向けて取付けて
受熱板とする。 In the above configuration, a case will be described in which, for example, the temperature change detection device 1 of the present invention is used as an indoor fire detector. When installing first, light source 5
and the light receiver 7 is installed at a suitable location away from the room,
A forming portion of the light beam 3 is provided in the ceiling of the room, and one mounting plate 14 is attached from the ceiling 16 toward the room to serve as a heat receiving plate.
かかる状態において、通常時においては、光源
５よりの投光は遮光板１１により全部もしくは一
部が遮光されて受光器７に投光されている。そし
て室内温度が形状記憶合金の変態温度以下のとき
はその状態が保持されている。また室内温度が都
合により徐々に上昇され、両感熱部材１２，１３
が上記変態温度以上に上昇された場合、両感熱部
材１２，１３それぞれ記憶された形状に復元する
力が働くが、相互の復元力は相殺される。従つて
遮光板１１は移行しない。或は両感熱部材１２，
１３の昇温に若干の誤差があつても、短時間後に
は両感熱部材の復元力は相殺される。この時間誤
差による遮光量の変化は、受光器７に連なる適宜
の補正回路で補正するようにすればよい。 In this state, under normal conditions, the light emitted from the light source 5 is projected onto the light receiver 7 with all or part of it blocked by the light shielding plate 11 . This state is maintained when the room temperature is below the transformation temperature of the shape memory alloy. In addition, the room temperature is gradually increased due to circumstances, and both heat-sensitive members 12 and 13
When the heat-sensitive members 12 and 13 are raised to the above-mentioned transformation temperature or higher, a force is exerted to restore each of the heat-sensitive members 12 and 13 to the memorized shape, but the mutual restoring forces cancel each other out. Therefore, the light shielding plate 11 does not move. Or both heat sensitive members 12,
Even if there is a slight error in the temperature rise of 13, the restoring forces of both heat-sensitive members cancel each other out after a short period of time. Changes in the amount of light shielding due to this time error may be corrected by an appropriate correction circuit connected to the light receiver 7.
次に火災等が発生し、室内温度が急激に上昇し
たとき、取付板１４を介して一方の感熱部材１２
のみが急激に加熱される。従つて該感熱部材１２
のみが変態温度を越えたとき記憶形状、即ち密着
巻きに復元する（第３図）。これによつて遮光板
１１は移行し、遮光量が変化され、受光器７はこ
れを検知し、警報を発せしめるものである。 Next, when a fire or the like occurs and the indoor temperature rises rapidly, one of the heat-sensitive members 12
only is heated rapidly. Therefore, the heat sensitive member 12
When the only material exceeds the transformation temperature, it restores to its memorized shape, that is, tightly wound (Fig. 3). As a result, the light shielding plate 11 moves and the amount of light shielded changes, and the light receiver 7 detects this and issues an alarm.
尚上記実施例は、各感熱部材１２，１３として
一方向記憶の形状記憶合金を使用した例について
説明したが、二方向記憶の形状記憶合金を使用し
てもよいことは勿論である。 In the above embodiment, a shape memory alloy with one-way memory is used as each of the heat-sensitive members 12 and 13, but it is of course possible to use a shape memory alloy with two-way memory.
更にまた上記実施例は、常時は遮光板１１によ
り光束３を遮光する位置に定位せしめる構造を示
したが、これは常時は遮光板１１を光束３の外方
に位置せしめ、温度上昇時、感熱部材１２の復元
力により光束を遮光する位置に移行せしめるよう
にしてもよい。さらに、上記実施例は感熱部材１
２，１３としてコイル状の形状記憶合金を使用し
たが、遮光板１１を移行せしめることができるも
のであれば、その他の形状記憶合金を使用しても
よい。 Furthermore, the above embodiment has shown a structure in which the light shielding plate 11 is normally positioned at a position where the light flux 3 is shielded, but this means that the light shielding plate 11 is normally positioned outside the light flux 3, and when the temperature rises, the light beam 3 is The restoring force of the member 12 may be used to shift the light beam to a position where it is blocked. Furthermore, in the above embodiment, the heat sensitive member 1
Although a coiled shape memory alloy is used as the shape memory alloys 2 and 13, other shape memory alloys may be used as long as the light shielding plate 11 can be moved.
以上の如く本発明によるときは、遮光板の両側
に形状記憶合金を以てする感熱部材を取付け、上
記遮光板を光フアイバーにより所要個所に形成せ
しめた光束に臨ましめるようにしたから、温度検
出個所の通常の温度の昇降時の如く両側の感熱部
材に温度差を生じないときは、夫々の復元力は相
殺され、従つて遮光板は移行されない。このため
光束に対する遮光量の変化を生ずることがない。
しかし火災等急激な温度変化を生じたときは、一
方の感熱部材のみが加熱昇温され、両感熱部材の
応力に差を生じ、これによつて遮光板が移行さ
れ、従つて火災等を確実に検知することができ
る。また、温度検出部には電気回路を使用しない
から、水を取扱う場所、或は爆発性ガス雰囲気に
おいても、防水或は防爆手段を必要としない等の
効果を有する。 As described above, according to the present invention, heat-sensitive members made of shape memory alloy are attached to both sides of the light-shielding plate, and the light-shielding plate is exposed to the light beam formed at the required locations by optical fibers. When there is no temperature difference between the heat-sensitive members on both sides, such as when the temperature rises or falls normally, the respective restoring forces cancel each other out, and therefore the light shielding plate is not moved. Therefore, there is no change in the amount of light shielding with respect to the luminous flux.
However, in the event of a sudden temperature change such as a fire, only one of the heat-sensitive members is heated, creating a difference in stress between the two heat-sensitive members, which causes the light-shielding plate to shift, thereby preventing fires, etc. can be detected. Further, since no electric circuit is used in the temperature detection section, there is an advantage that waterproofing or explosion-proof means are not required even in places where water is handled or in an explosive gas atmosphere.
図面は本発明の一実施例を示し、第１図は温度
変化検出装置全体の平面概略図、第２図は第１図
Ｘ−Ｘ線に沿う要部の正面図、第３図は火災発生
時の要部の作動説明図である。
１……温度変化検出装置、２……光伝送部、３
……光束、４……遮光部、６……投光用光フアイ
バ、８……受光用光フアイバ、１１……遮光板、
１２，１３……感熱部材。
The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic plan view of the entire temperature change detection device, Fig. 2 is a front view of the main part along the line X-X in Fig. FIG. 1... Temperature change detection device, 2... Optical transmission section, 3
... Luminous flux, 4 ... Light shielding part, 6 ... Optical fiber for light emission, 8 ... Optical fiber for light reception, 11 ... Light shielding plate,
12, 13...Heat-sensitive member.
Claims (1)
る一対の光フアイバと、両光フアイバ間に形成さ
れる光束を遮光する遮光部とよりなり、該遮光部
は上記光束内に臨ましめる遮光板と、該遮光板の
両側にそれぞれ取付けられる感熱部材とにより構
成され、両感熱部材はそれぞれ形状記憶合金を似
て形成され、両感熱部材に加えられる温度差によ
る復元力の差により遮光板を移行し、遮光量を変
化せしめることを特徴とする温度変化検出装置。1 Consists of a pair of optical fibers placed opposite each other with an interval to form an optical transmission path, and a light shielding part that blocks the light flux formed between the two optical fibers, and the light shielding part faces into the light flux. It consists of a light-shielding plate that closes the body, and a heat-sensitive member attached to each side of the light-shielding plate. Both heat-sensitive members are made of similar shape memory alloys, and light is blocked by the difference in restoring force due to the temperature difference applied to both heat-sensitive members. A temperature change detection device characterized by changing the amount of light shielded by moving the plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP618183A JPS59131127A (en) | 1983-01-17 | 1983-01-17 | Temperature variation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP618183A JPS59131127A (en) | 1983-01-17 | 1983-01-17 | Temperature variation detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59131127A JPS59131127A (en) | 1984-07-27 |
| JPS641732B2 true JPS641732B2 (en) | 1989-01-12 |
Family
ID=11631374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP618183A Granted JPS59131127A (en) | 1983-01-17 | 1983-01-17 | Temperature variation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59131127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02133482U (en) * | 1989-04-05 | 1990-11-06 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62147328A (en) * | 1985-12-20 | 1987-07-01 | Matsushita Electric Ind Co Ltd | light temperature sensor |
| JPS62147330A (en) * | 1985-12-20 | 1987-07-01 | Matsushita Electric Ind Co Ltd | light temperature sensor |
| JPS62147332A (en) * | 1985-12-20 | 1987-07-01 | Matsushita Electric Ind Co Ltd | Optical temperature sensor |
| JPS62147329A (en) * | 1985-12-20 | 1987-07-01 | Matsushita Electric Ind Co Ltd | light temperature sensor |
| JPS63163238A (en) * | 1986-12-26 | 1988-07-06 | Matsushita Electric Ind Co Ltd | light temperature sensor |
| JPS63153144U (en) * | 1987-03-27 | 1988-10-07 | ||
| JP4774284B2 (en) * | 2005-12-05 | 2011-09-14 | Ｈｏｙａ株式会社 | Light source device |
| US20120033710A1 (en) * | 2009-08-26 | 2012-02-09 | Optopower Co., Ltd. | Optical temperature sensor |
| KR100948514B1 (en) | 2009-08-26 | 2010-03-23 | 옵토파워주식회사 | Optical temperature sensor |
-
1983
- 1983-01-17 JP JP618183A patent/JPS59131127A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02133482U (en) * | 1989-04-05 | 1990-11-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59131127A (en) | 1984-07-27 |
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