JPH0354297B2 - - Google Patents
Info
- Publication number
- JPH0354297B2 JPH0354297B2 JP6122084A JP6122084A JPH0354297B2 JP H0354297 B2 JPH0354297 B2 JP H0354297B2 JP 6122084 A JP6122084 A JP 6122084A JP 6122084 A JP6122084 A JP 6122084A JP H0354297 B2 JPH0354297 B2 JP H0354297B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- hydrogen
- storage metal
- hydrogen storage
- detector
- 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
- 239000007789 gas Substances 0.000 claims description 65
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 48
- 239000001257 hydrogen Substances 0.000 claims description 39
- 229910052739 hydrogen Inorganic materials 0.000 claims description 39
- 238000001514 detection method Methods 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
- 229910052719 titanium Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910006404 SnO 2 Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/007—Arrangements to check the analyser
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【発明の詳細な説明】
この発明は、少なくとも水素ガスを検知するこ
とができるガス検出素子を備えたガス検出器に関
するもので、特に遠隔地点からでも動作試験を行
なうことができるガス検知器に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas detector equipped with a gas detection element that can detect at least hydrogen gas, and particularly to a gas detector that can perform operation tests even from a remote location. It is.
漏洩したガスを検知するガス検知器は、正常に
動作するか否かの動作試験を行なう必要がある。 Gas detectors that detect leaked gas need to be tested to see if they are working properly.
従来、この動作試験は、試験用ガスの入つた小
型ガスボンベをガス検知器の設置場所まで持参
し、ガスボンベより試験用ガスをガス検知器に向
けて放出し、ガス検知器が動作するか否か試験を
行なつている。このため、動作試験を行なう際
は、ガスボンベを事前に用意し、かつガス検知器
の設置場所まで行かなければならず、非常に手間
がかかるとともに面倒であつた。特に水素ガスを
検知するガス検知器の場合には、水素ガス以外の
ガスをも検出するものの時は試験用ガスとして水
素以外のガスを用いれば良いので危険性は少ない
が、水素ガスを検知対象とするものでは試験用ガ
スとしての水素ガスが入つたボンベを取り扱かわ
なければならず、上記以外に爆発の危険性があつ
た。 Conventionally, this operation test involves bringing a small gas cylinder containing a test gas to the gas detector installation location, releasing the test gas from the gas cylinder toward the gas detector, and checking whether the gas detector operates or not. Tests are being conducted. Therefore, when conducting an operation test, it is necessary to prepare a gas cylinder in advance and go to the installation location of the gas detector, which is very time-consuming and troublesome. In particular, in the case of a gas detector that detects hydrogen gas, it is less dangerous because it is sufficient to use a gas other than hydrogen as the test gas. In this case, the cylinder containing hydrogen gas as the test gas had to be handled, and there was a risk of explosion in addition to the above.
この発明は上記の点にかんがみ、水素ガスを用
いて安全で容易にかつ遠隔地点からでも簡単に動
作試験を行なうことができるガス検知器を提供す
るもので、水素ガスに応答するガス検出素子を備
えたガス検知器に、常温下では水素を安定に吸蔵
し高温に加熱された時に吸蔵している水素を放出
する水素吸蔵金属と、この水素吸蔵金属を吸蔵し
ている水素の放出に適当な温度に加熱する加熱手
段とを設けたことを特徴とするものである。 In view of the above points, the present invention provides a gas detector that can safely and easily perform operation tests using hydrogen gas, even from a remote location, and includes a gas detection element that responds to hydrogen gas. The equipped gas detector contains a hydrogen storage metal that stably stores hydrogen at room temperature and releases the stored hydrogen when heated to a high temperature, and a hydrogen storage metal that is suitable for releasing the hydrogen stored in this hydrogen storage metal. The device is characterized in that it is provided with a heating means for heating to a certain temperature.
以下、この発明によるガス検知器の１実施例を
図面により説明する。 Hereinafter, one embodiment of the gas detector according to the present invention will be described with reference to the drawings.
第１図はこの発明によるガス検知器の構造の概
略図で、ガス検知器１は検出回路や信号送出回路
などが収容されるベース２上に、ガス検知ユニツ
ト３と、水素吸蔵金属（水素貯蔵合金ともいう）
を収容した容器ならびに加熱手段を有する水素放
出ユニツト４とが設けられ、このユニツト４に導
管５が取り付けられ、これらユニツト３，４と導
管５の周囲が通気口６１を有するカバー６によつ
て囲われて構成される。 FIG. 1 is a schematic diagram of the structure of a gas detector according to the present invention. The gas detector 1 has a gas detection unit 3 and a hydrogen storage metal (hydrogen storage (Also called alloy)
A hydrogen release unit 4 having a heating means and a container containing hydrogen are provided, a conduit 5 is attached to the unit 4, and the units 3, 4 and the conduit 5 are surrounded by a cover 6 having a vent 61. composed of
第２図はガス検知ユニツト３と水素放出ユニツ
ト４の１実施例の断面図で、ガス検知ユニツト３
は、磁気管上に１対の電極間を覆つて少なくとも
水素ガスに応答する例えばPd−SnO2系あるいは
Pt−SnO2系などの金属酸化物半導体が設けられ
たガス検出素子３１が、ホールダ３２に植設され
たピン３３に取り付けられ、さらに防爆用金網３
４がガス検出素子３１を囲うようにホールダ３２
に取り付けられて構成される。また水素放出ユニ
ツト４は、凹部を有するステンレス製の容器４１
内に、鉄・チタン（Fe、Ti）、ランタン・ニツケ
ル（La、Ni）あるいはジルコニウム・チタン
（Zr、Ti）などの水素吸蔵金属４２が収容され、
容器４１の凹部に水素吸蔵金属４２を吸蔵してい
る水素の放出に必要な温度に加熱するための加熱
手段としてヒータ４３が設けられ、さらに容器４
１に他端がガス検知ユニツト３の金網３４の近傍
に臨む導管５が取り付けられて構成される。なお
水素吸蔵金属は、常温下で自己の体積の数10〜数
100倍の水素を安定に吸蔵し、150℃前後以上の高
温に加熱されると吸蔵している水素を外部に放出
するもので、上記ガス検知ユニツト３の金網３４
で囲まれた台錐形部分の体積を約６cm3（最大径２
cm、高さ２cm）とし、この金網３４で囲まれた部
分を動作試験時に水素ガス濃度を2000ppmにする
ものとすると、自己の体積の50倍の水素を吸蔵し
ている水素吸蔵金属を１cm3（この時の容器４１の
体積は２〜2.5cm3程度）用いることにより、100回
以上の動作試験用の水素ガスの放出ができる。 FIG. 2 is a sectional view of one embodiment of the gas detection unit 3 and the hydrogen release unit 4.
For example, Pd-SnO 2 system or
A gas detection element 31 provided with a metal oxide semiconductor such as Pt-SnO 2 is attached to a pin 33 implanted in a holder 32, and an explosion-proof wire mesh 3
4 surrounds the gas detection element 31.
configured by being attached to. Further, the hydrogen release unit 4 is made of a stainless steel container 41 having a recess.
A hydrogen storage metal 42 such as iron/titanium (Fe, Ti), lanthanum/nickel (La, Ni), or zirconium/titanium (Zr, Ti) is housed inside.
A heater 43 is provided in the concave portion of the container 41 as a heating means for heating the hydrogen storage metal 42 to a temperature necessary for releasing the hydrogen stored therein.
A conduit 5 whose other end faces near the wire mesh 34 of the gas detection unit 3 is attached to the gas detection unit 1. Note that hydrogen storage metals have a volume of 10 to 100% of their own volume at room temperature.
It stably stores 100 times more hydrogen and releases the stored hydrogen to the outside when heated to a high temperature of around 150°C or higher, and the wire mesh 34 of the gas detection unit 3
The volume of the frustum-shaped part surrounded by is approximately 6 cm 3 (maximum diameter 2
cm, height 2 cm), and if the hydrogen gas concentration in the area surrounded by the wire mesh 34 is to be 2000 ppm during the operation test, 1 cm 3 of hydrogen storage metal that stores 50 times its own volume of hydrogen. (The volume of the container 41 at this time is about 2 to 2.5 cm 3 ) By using this, hydrogen gas can be released for 100 or more operation tests.
第３図は上記ガス検知器１を受信機８に接続し
た場合の１実施例の回路図で、ガス検知器１にお
いて、３５はガス検出素子３１の加熱用ヒータ、
７はガス検出素子３１が所定濃度のガスを検知し
たか否かを判別する比較器、SCRは警報信号送
出用のシリコン制御整流素子、L1は動作表示灯
としての発光ダイオードである。また受信機８に
おいて、Ｎは警報信号受信リレー、L2はガス漏
れ表示灯、Ｂは警報ベル、８１は動作試験スイツ
チ、８２は復旧スイツチである。 FIG. 3 is a circuit diagram of an embodiment in which the gas detector 1 is connected to the receiver 8. In the gas detector 1, 35 is a heater for heating the gas detection element 31;
7 is a comparator for determining whether or not the gas detection element 31 has detected a predetermined concentration of gas; SCR is a silicon-controlled rectifier for sending out an alarm signal; and L1 is a light emitting diode as an operation indicator. Further, in the receiver 8, N is an alarm signal receiving relay, L2 is a gas leak indicator light, B is an alarm bell, 81 is an operation test switch, and 82 is a recovery switch.
このように構成されるガス検知器１は、通常は
ガス検知ユニツト３のヒータ３５が受信機８の電
源E2より供給される電流により発熱し、ガス検
出素子３１をガス検出に適当な所定温度、例えば
300℃に加熱し、ガス漏れを監視している。 In the gas detector 1 configured as described above, the heater 35 of the gas detection unit 3 normally generates heat by the current supplied from the power source E2 of the receiver 8, and the gas detection element 31 is heated to a predetermined temperature suitable for gas detection. ,for example
It is heated to 300℃ and monitored for gas leaks.
動作試験を行なう場合には、受信機８の試験ス
イツチ８１を閉成し、電源E3より電流をヒータ
４３に供給し、ヒータ４３を発熱させる。このヒ
ータ４３の発熱により容器４１内に収容されてい
る水素吸蔵金属４２が加熱され、水素吸蔵金属４
２は吸蔵している水素を放出する。この放出され
た水素ガスは、容器４１内に生じるガス圧の作用
により、導管５によつてガス検出素子３１に向け
放射される。この時、ガス検出素子３１が正常な
状態であれば、ガス検出素子３１は水素吸蔵金属
４２より放出された水素ガスを吸着してその抵抗
値が低下し、比較器７が検出出力を生じ、SCR
がオンして警報信号を送出するとともに動作表示
灯L1を点灯させる。一方、受信機８では、検知
器１より送出された警報信号により受信リレーＮ
が動作し、ガス漏れ表示灯L2が点灯するととも
に警報ベルＢが動作する。このガス漏れ表示灯
L2の点灯により、ガス検知器１が正常に動作し
たことが判別できる。そして試験スイツチ８１を
開成することにより、検知器１のヒータ４３は発
熱を停止し、水素吸蔵金属４２は水素の放出を停
止する。また復旧スイツチ８２を開成することに
より、検知器１はSCRがオフとなつて警報信号
の送出を停止する。 When performing an operation test, the test switch 81 of the receiver 8 is closed, and current is supplied from the power source E 3 to the heater 43 to cause the heater 43 to generate heat. The hydrogen storage metal 42 housed in the container 41 is heated by the heat generated by the heater 43, and the hydrogen storage metal 42 is heated.
2 releases the stored hydrogen. This released hydrogen gas is emitted toward the gas detection element 31 through the conduit 5 due to the action of the gas pressure generated within the container 41 . At this time, if the gas detection element 31 is in a normal state, the gas detection element 31 adsorbs hydrogen gas released from the hydrogen storage metal 42, its resistance value decreases, and the comparator 7 produces a detection output. SCR
turns on, sends out an alarm signal, and lights up the operation indicator L1 . On the other hand, in the receiver 8, the receiving relay N is activated by the alarm signal sent from the detector 1.
operates, gas leak indicator light L2 lights up, and alarm bell B operates. This gas leak indicator light
By lighting L2 , it can be determined that the gas detector 1 has operated normally. By opening the test switch 81, the heater 43 of the detector 1 stops generating heat, and the hydrogen storage metal 42 stops releasing hydrogen. Furthermore, by opening the recovery switch 82, the SCR of the detector 1 is turned off and the sending of the alarm signal is stopped.
なお、上記実施例において、水素吸蔵金属加熱
用ヒータ４３を常時開放の試験スイツチを介して
ガス検出素子加熱用ヒータ３５の電源端子に接続
するようにして、ガス検知器１の場所で動作試験
を行なえるようにしてもよい。 In the above embodiment, the operation test was conducted at the location of the gas detector 1 by connecting the hydrogen storage metal heater 43 to the power terminal of the gas detection element heater 35 via a normally open test switch. It may be possible to do so.
この発明によれば、水素ガスに応答するガス検
出素子を備えたガス検知器に、水素吸蔵金属と、
この水素吸蔵金属を吸蔵している水素の放出に適
当な温度に加熱する加熱手段とを設けるようにし
たので、爆発の危険性がある液体又は気体の水素
が入つたガスボンベを使用することなく、安全か
つ簡単に、また遠隔地点からでも容易に動作試験
を行なうことができるガス検知器が得られる。 According to this invention, a gas detector equipped with a gas detection element that responds to hydrogen gas includes a hydrogen storage metal;
Since this hydrogen storage metal is equipped with a heating means to heat it to an appropriate temperature for releasing the stored hydrogen, there is no need to use a gas cylinder containing liquid or gaseous hydrogen that has the risk of explosion. A gas detector whose operation can be tested safely and easily, even from a remote location, is obtained.
第１図はこの発明によるガス検知器の１実施例
の概略図、第２図はガス検知ユニツトと水素放出
ユニツトの１実施例の断面図、第３図は１実施例
の回路図である。
１…ガス検知器、３…ガス検知ユニツト、３１
…ガス検出素子、４…水素放出ユニツト、４１…
容器、４２…水素吸蔵金属、４３…加熱手段、５
…導管。
FIG. 1 is a schematic diagram of an embodiment of a gas detector according to the present invention, FIG. 2 is a sectional view of an embodiment of a gas detection unit and a hydrogen release unit, and FIG. 3 is a circuit diagram of an embodiment. 1... Gas detector, 3... Gas detection unit, 31
...Gas detection element, 4...Hydrogen release unit, 41...
Container, 42... Hydrogen storage metal, 43... Heating means, 5
…conduit.
Claims (1)
ス検知器に、水素吸蔵金属と、上記水素吸蔵金属
を水素の放出に必要な温度に加熱する加熱手段と
を設けたことを特徴とするガス検知器。 ２ 水素吸蔵金属は、放出される水素ガスをガス
検出素子に導く導管を備えた容器内に収容されて
いる特許請求の範囲第１項記載のガス検知器。[Scope of Claims] 1. A gas detector equipped with a gas detection element that responds to hydrogen gas is provided with a hydrogen storage metal and a heating means for heating the hydrogen storage metal to a temperature necessary for releasing hydrogen. A gas detector featuring: 2. The gas detector according to claim 1, wherein the hydrogen storage metal is housed in a container equipped with a conduit that guides released hydrogen gas to the gas detection element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6122084A JPS60205246A (en) | 1984-03-30 | 1984-03-30 | Gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6122084A JPS60205246A (en) | 1984-03-30 | 1984-03-30 | Gas detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60205246A JPS60205246A (en) | 1985-10-16 |
| JPH0354297B2 true JPH0354297B2 (en) | 1991-08-19 |
Family
ID=13164897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6122084A Granted JPS60205246A (en) | 1984-03-30 | 1984-03-30 | Gas detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60205246A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1281957A1 (en) * | 2001-07-30 | 2003-02-05 | Siemens Building Technologies AG | Combustible gas detector with self-testing device |
| US7152458B2 (en) | 2004-11-30 | 2006-12-26 | Honeywell International Inc. | Nano-crystalline and/or metastable metal hydrides as hydrogen source for sensor calibration and self-testing |
| US20060118416A1 (en) * | 2004-12-08 | 2006-06-08 | Honeywell International, Inc. | Electrochemical sensor system |
-
1984
- 1984-03-30 JP JP6122084A patent/JPS60205246A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60205246A (en) | 1985-10-16 |
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