JPH04124455U - Solid electrolyte carbon dioxide sensor - Google Patents
Solid electrolyte carbon dioxide sensorInfo
- Publication number
- JPH04124455U JPH04124455U JP2963891U JP2963891U JPH04124455U JP H04124455 U JPH04124455 U JP H04124455U JP 2963891 U JP2963891 U JP 2963891U JP 2963891 U JP2963891 U JP 2963891U JP H04124455 U JPH04124455 U JP H04124455U
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- carbon dioxide
- electrode
- solid electrolyte
- voltage
- 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
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 34
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 34
- 239000007784 solid electrolyte Substances 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000006641 stabilisation Effects 0.000 claims abstract description 9
- 238000011105 stabilization Methods 0.000 claims abstract description 9
- 239000010416 ion conductor Substances 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 17
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 12
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 6
- 150000008041 alkali metal carbonates Chemical class 0.000 description 6
- 229910052697 platinum Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010494 dissociation reaction Methods 0.000 description 4
- 230000005593 dissociations Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910001413 alkali metal ion Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Abstract
(57)【要約】
【目的】 電源投入後、安定動作状態になるまでの初期
安定時間を短縮し、炭酸ガス濃度の測定精度の向上した
固体電解質型炭酸ガスセンサの提供を目的とする。
【構成】 対向する検知電極６ｂと基準電極６ｃ及びこ
れらを所定の動作温度まで加熱するヒータ６ａを備え
る。ヒータ６ａの加熱はヒータ電源５の電圧ＶH をヒー
タ６ａに印加することによりおこなう。検知電極６ｂと
基準電極６ｃ間にはリレー接点３を介してセンサ電極電
源４を接続する。スイッチ１を投入するとタイマー回路
２が作動して、一定時間リレー接点３が閉じ、電極６
ｂ，６ｃ間に電圧ＶP が印加される。検知電極６ｂと基
準電極６ｃには抵抗Ｒを介して起電力検出部７が接続さ
れ、出力端子８には炭酸ガスの濃度に応じたセンサ電極
６ｂ，６ｃ間の起電力が出力する。
(57) [Summary] [Purpose] The purpose is to provide a solid electrolyte carbon dioxide sensor that shortens the initial stabilization time until a stable operating state is reached after power is turned on, and improves the accuracy of measuring carbon dioxide concentration. [Structure] It includes a sensing electrode 6b and a reference electrode 6c facing each other, and a heater 6a for heating these to a predetermined operating temperature. The heater 6a is heated by applying the voltage V H of the heater power source 5 to the heater 6a. A sensor electrode power source 4 is connected via a relay contact 3 between the detection electrode 6b and the reference electrode 6c. When switch 1 is turned on, timer circuit 2 is activated, relay contact 3 is closed for a certain period of time, and electrode 6 is closed.
A voltage V P is applied between b and 6c. An electromotive force detection unit 7 is connected to the detection electrode 6b and the reference electrode 6c via a resistor R, and an electromotive force between the sensor electrodes 6b and 6c is outputted to an output terminal 8 according to the concentration of carbon dioxide gas.
Description
【０００１】0001
本考案は、固体電解質型の炭酸ガスセンサに関する。 The present invention relates to a solid electrolyte type carbon dioxide sensor.
【０００２】0002
従来、雰囲気中に存在するガス成分を検出するセンサの一つとして固体電解質 型センサがある。該センサは、通常、イオン伝動体である固体電解質を挟んだ形 で検知電極と基準電極とを有するセンサ電極を備えている。該固体電解質として は特定のイオンが移動するイオン導電体を用い、検知電極と基準電極には白金等 の金属を用いている。そして、これらの電極に、先の特定のイオンと検知目的の ガス成分との両者を含む化合物を被覆して、一方だけが被検ガスに接触するよう にして加熱し、両電極間に生じる起電力を計測してガス濃度を検出している。 Traditionally, solid electrolytes have been used as a sensor to detect gas components present in the atmosphere. There is a type sensor. The sensor usually has a solid electrolyte sandwiched between them, which is an ion conductor. and a sensor electrode having a sensing electrode and a reference electrode. As the solid electrolyte uses an ionic conductor through which specific ions move, and the detection electrode and reference electrode are made of platinum, etc. metal is used. These electrodes are then charged with the specific ion and the object of detection. A compound containing both the gas component and the gas component is coated so that only one side comes into contact with the test gas. The gas concentration is detected by heating the gas and measuring the electromotive force generated between the two electrodes.
【０００３】 検出用のガスが炭酸ガスの場合の固体電解質型炭酸ガスセンサは、通常、イオ ン伝導体に固体電解質からなるアルカリ金属イオン伝導体を用いている。また、 該イオン伝導体を挟んでいる検知電極としては白金の網等を用いてアルカリ金属 炭酸塩で被覆し、基準電極としては白金のみかあるいはこれにアルカリ金属炭酸 塩で被覆したうえ、これを空気または炭酸ガスの中に密封したものが用いられて いる。このため、被検ガスは検知電極には接触できるが、基準電極には接触でき ないようになっている。0003 When the detection gas is carbon dioxide, solid electrolyte carbon dioxide sensors usually use iodine. An alkali metal ion conductor made of a solid electrolyte is used as the conductor. Also, As the detection electrodes sandwiching the ion conductor, a platinum mesh or the like is used to detect the alkali metal. The reference electrode is either platinum alone or alkali metal carbonate. It is coated with salt and then sealed in air or carbon dioxide gas. There is. Therefore, the test gas can contact the detection electrode, but not the reference electrode. There is no such thing.
【０００４】 そして、このセンサ電極を被検ガスである炭酸ガス雰囲気中で約４００℃から ６００℃程度に加熱すると、検知電極のアルカリ金属炭酸塩が雰囲気中の炭酸ガ スと解離平行に達し両電極間に起電力が発生する。この起電力は炭酸ガス濃度に 応じて変化するため、その変化量により雰囲気中の炭酸ガスの濃度を検出するこ とができるのである。0004 Then, this sensor electrode was heated to about 400°C in a carbon dioxide atmosphere, which is the gas to be detected. When heated to about 600°C, the alkali metal carbonate of the sensing electrode will release carbon dioxide in the atmosphere. The electromotive force is generated between both electrodes. This electromotive force increases the carbon dioxide concentration The concentration of carbon dioxide in the atmosphere can be detected based on the amount of change. It is possible to do this.
【０００５】[0005]
【考案が解決しようとする課題】 しかしながら、従来のこの炭酸ガスセンサは未動作（放置）の状態からセンサ 電極を加熱して動作状態とするときに、アルカリ金属炭酸塩が雰囲気中の炭酸ガ スと解離平行に達するまでに要する時間が長く、雰囲気中の炭酸ガスが高濃度で あれば発生する起電力は小さいが、通常の大気中のように炭酸ガス濃度が３５０ ｐｐｍ程度の低濃度では解離が大きく起電力も大きいため、図３に示すように、 徐々に起電力が上昇して安定するまでの時間が３０分以上と非常に長くなる。[Problem that the idea aims to solve] However, when this conventional carbon dioxide sensor is not operating (left unused), the sensor cannot be detected. When the electrode is heated and put into operation, the alkali metal carbonate is removed from the carbon dioxide in the atmosphere. It takes a long time to reach the dissociation parallel to the gas, and the carbon dioxide in the atmosphere is highly concentrated. The electromotive force generated is small, but if the carbon dioxide concentration is 350 At concentrations as low as ppm, the dissociation is large and the electromotive force is large, so as shown in Figure 3, The time it takes for the electromotive force to gradually rise and stabilize is extremely long, 30 minutes or more.
【０００６】 このため、短時間に測定を終わらせる必要の多い携帯用の測定器とした場合に は測定値の精度が上げられないという問題がある。また、濃度計とした場合に、 起電力が小から大（濃度表示では高から低）への変化が遅いと、起電力が小さい とき表示がメータ設定を越え、トラブルを生じているのか否かの判断ができない 等の問題がある。[0006] For this reason, when used as a portable measuring device that often needs to complete measurements in a short period of time, has the problem that the accuracy of measured values cannot be improved. Also, when used as a concentration meter, If the electromotive force changes slowly from small to large (from high to low in the concentration display), the electromotive force is small. When the display exceeds the meter setting, it is impossible to determine whether or not a problem is occurring. There are other problems.
【０００７】 本考案は、電源投入後、安定動作状態になるまでの初期安定化時間を短縮し、 炭酸ガス濃度の測定精度の向上した固体電解質型炭酸ガスセンサの提供を目的と する。[0007] This invention shortens the initial stabilization time after power-on until it reaches a stable operating state. The aim is to provide a solid electrolyte carbon dioxide sensor with improved measurement accuracy of carbon dioxide concentration. do.
【０００８】[0008]
本考案に係る固体電解質型炭酸ガスセンサは、固体電解質からなるイオン伝導 体と、該イオン伝導体を挟んで対向する二個の電極からなり、接触する炭酸ガス の濃度に対応して起電力を発生するセンサ電極と、該センサ電極を加熱する加熱 手段と、該センサ電極間に発生する起電力と同一極性の一定電圧を一定時間該セ ンサ電極間に印加する初期安定化手段とを備えたことを特徴としている。 The solid electrolyte carbon dioxide sensor according to the present invention is an ionic conductor made of a solid electrolyte. It consists of a body and two electrodes facing each other with the ion conductor in between, and the carbon dioxide gas that comes into contact with it. A sensor electrode that generates an electromotive force in response to the concentration of and applying a constant voltage of the same polarity as the electromotive force generated between the sensor electrodes for a certain period of time to the sensor. and an initial stabilizing means for applying voltage between the sensor electrodes.
【０００９】 また、本考案に係る固体電解質型炭酸ガスセンサは、前記加熱手段によるセン サ電極の加熱開始と同時に前記初期安定化手段によりセンサ電極間に電圧を印加 するようにしたことを特徴としている。[0009] Further, the solid electrolyte carbon dioxide sensor according to the present invention has a sensor using the heating means. A voltage is applied between the sensor electrodes by the initial stabilizing means at the same time as heating of the sensor electrodes starts. It is characterized by the fact that it is made to do so.
【００１０】0010
【作用】 上述構成に基づき、固体電解質型炭酸ガスセンサのセンサ電極を被検ガスの雰 囲気中に置き電源を投入すると、加熱手段によってセンサ電極の温度が上昇しは じめる。また、これと同時に、初期安定化手段によってセンサ電極の検知電極と 基準電極の両電極間に一定電圧が一定時間印加される。この印加電圧により検知 電極を通常被覆している炭酸塩の解離が進んで平行に達し、短時間でセンサが安 定動作状態になる。[Effect] Based on the above configuration, the sensor electrode of the solid electrolyte carbon dioxide sensor is connected to the atmosphere of the gas to be detected. When placed in an ambient atmosphere and turned on, the temperature of the sensor electrode will rise due to the heating means. It gets damp. At the same time, the detection electrode of the sensor electrode is A constant voltage is applied between both electrodes of the reference electrode for a certain period of time. Detected by this applied voltage The dissociation of the carbonate that normally coats the electrodes progresses to a parallel state, and the sensor becomes stable in a short period of time. It enters a constant operating state.
【００１１】[0011]
以下、図面に基づき本考案の実施例について説明する。 Embodiments of the present invention will be described below based on the drawings.
【００１２】 図１には、本考案に係る固体電解質型炭酸ガスセンサの電気回路が示されてい る。該固体電解質型炭酸ガスセンサは、センサ電極６を有しており、該センサ電 極６は固体電解質からなるアルカリ金属イオン伝導体と、該イオン伝導体を挟ん で対向する検知電極６ｂと基準電極６ｃ及びこれらの電極６ｂ，６ｃを所定の動 作温度まで加熱するヒータ６ａ等で構成されている。検知電極６ｂとしては白金 の網等を用いてアルカリ金属炭酸塩で被覆し、基準電極６ｃとしては白金のみか あるいはこれにアルカリ金属炭酸塩で被覆したうえ、これを空気または炭酸ガス の中に密封したものが用いられている。0012 Figure 1 shows the electrical circuit of the solid electrolyte carbon dioxide sensor according to the present invention. Ru. The solid electrolyte carbon dioxide sensor has a sensor electrode 6. Pole 6 is an alkali metal ion conductor made of a solid electrolyte, and an alkali metal ion conductor sandwiching the ion conductor. Detection electrode 6b and reference electrode 6c facing each other and these electrodes 6b and 6c are moved in a predetermined manner. It is composed of a heater 6a and the like that heats up to the operating temperature. Platinum is used as the detection electrode 6b. The reference electrode 6c is coated with an alkali metal carbonate using a mesh, etc., and only platinum is used as the reference electrode 6c. Alternatively, this is coated with alkali metal carbonate and then exposed to air or carbon dioxide. A sealed container is used.
【００１３】 前記ヒータ６ａの加熱は電源スイッチ１を投入することによって、ヒータ電源 ５の電圧ＶH を該ヒータ６ａに印加することによりおこなわれる。また、前記セ ンサ電極６の検知電極６ｂと基準電極６ｃ間にはリレー接点３を介してセンサ電 極電源４が接続されており、前記スイッチ１が投入されるとタイマー回路２が作 動して、一定時間リレー接点３が閉じ、電極６ｂ，６ｃ間に電圧ＶP が印加され るようになっている。前記センサ電極電源４，リレー接点３，タイマー回路２に より構成する回路を初期安定化手段１０という。なお、タイマー回路２は単線で 示されている。Heating of the heater 6a is performed by turning on the power switch 1 and applying the voltage V H of the heater power source 5 to the heater 6a. Further, a sensor electrode power source 4 is connected between the detection electrode 6b and the reference electrode 6c of the sensor electrode 6 through a relay contact 3, and when the switch 1 is turned on, a timer circuit 2 is activated to maintain a constant Time relay contact 3 is closed, and voltage V P is applied between electrodes 6b and 6c. A circuit constituted by the sensor electrode power supply 4, relay contact 3, and timer circuit 2 is referred to as initial stabilization means 10. Note that the timer circuit 2 is shown as a single line.
【００１４】 また、前記検知電極６ｂと基準電極６ｃには抵抗Ｒを介して起電力検出部７が 接続されており、該起電力検出部７の出力端子８には炭酸ガスの濃度に応じたセ ンサ電極６ｂ，６ｃ間の起電力が出力するようになっている。[0014] Further, an electromotive force detection section 7 is connected to the detection electrode 6b and the reference electrode 6c via a resistor R. The output terminal 8 of the electromotive force detection section 7 has a sensor corresponding to the concentration of carbon dioxide gas. The electromotive force between sensor electrodes 6b and 6c is output.
【００１５】 この構成で、炭酸ガス雰囲気中において電源スイッチ１が投入されると、セン サ電極６のヒータ６ａに所定の電圧ＶH が印加されてセンサ６は加熱され時間の 経過により４００℃から６００℃程度になる。同時に、タイマー回路２が作動し てリレー接点３を介して一定時間センサ電極６ｂ，６ｃ間に電圧ＶP が印加され る。この電圧ＶP の極性はセンサ電極６ｂ，６ｃ間に発生する起電力と同極性に している。図２には、ＶP ＝３５０ｍＶで印加時間Ｔ＝１０ｓｅｃとしたときの 出力端子８からの出力波形が示されており、従来のものが安定出力（出力電圧の 変化がなくなった電圧）に到達するまでの時間は、図３に示すように、３０分程 かかるのに対して、印加電圧ＶP により検知電極６ｂのアルカリ金属炭酸塩の解 離が進み、３分以内で安定になり安定化時間が約１／１０に短縮され、測定時間 が大幅に短縮されることになる。With this configuration, when the power switch 1 is turned on in a carbon dioxide atmosphere, a predetermined voltage V H is applied to the heater 6a of the sensor electrode 6, and the sensor 6 is heated from 400° C. to 600° C. over time. It will be around ℃. At the same time, the timer circuit 2 is activated and a voltage V P is applied between the sensor electrodes 6b and 6c for a certain period of time via the relay contact 3. The polarity of this voltage V P is made the same as the electromotive force generated between the sensor electrodes 6b and 6c. Figure 2 shows the output waveform from the output terminal 8 when V P = 350 mV and application time T = 10 seconds, and the conventional one reaches a stable output (voltage at which there is no change in output voltage). As shown in Fig. 3, it takes about 30 minutes, but the applied voltage V P causes the dissociation of the alkali metal carbonate in the sensing electrode 6b to proceed, and the stabilization time is reached within 3 minutes. The measurement time will be reduced to about 1/10, and the measurement time will be significantly shortened.
【００１６】 図２では、センサ電源６ｂ，６ｃ間に加える電圧ＶP ＝３５０ｍＶとしたが、 この電圧ＶP は安定出力に近い程安定化時間が短縮される。なお、図４に示すよ うに、電圧ＶP の供給電源として乾電池（１．５Ｖ）とした場合でも安定化時間 が約５分と従来の１／６と短縮され、電圧ＶP は必ずしも安定出力と同程度でな ければ効果が得られないという訳ではない。In FIG. 2, the voltage V P applied between the sensor power supplies 6b and 6c is set to 350 mV, but the closer this voltage V P is to a stable output, the shorter the stabilization time is. As shown in Figure 4, even when a dry battery (1.5V) is used as the power supply for the voltage V P , the stabilization time is shortened to about 5 minutes, 1/6 of the conventional time, and the voltage V P does not necessarily provide a stable output. This does not mean that the effect cannot be obtained unless the level is the same.
【００１７】 また、電圧ＶP の印加時間Ｔは、電圧ＶP が安定出力近傍であれば、１０秒に 限定されることなく１０秒から２分の範囲で用いると安定化時間を短縮すること ができる。しかし、安定出力とは相当異なる電圧の乾電池（１．５Ｖ）を用いた 場合には、長い時間印加すると安定出力まで戻るまでの時間がかかるため、印加 時間は６０秒以内が良く、好ましくは２，３秒から１０秒以内とする方がよい。[0017] Furthermore, the application time T of the voltage V P is not limited to 10 seconds, but can be used in the range of 10 seconds to 2 minutes to shorten the stabilization time if the voltage V P is close to a stable output. I can do it. However, if a dry battery (1.5V) with a voltage considerably different from the stable output is used, it will take time to return to the stable output if the voltage is applied for a long time, so the application time should be within 60 seconds, preferably 2. , preferably within 3 to 10 seconds.
【００１８】 次に、他の実施例について説明する。なお、先の実施例と同じ回路部品には同 符号を付して説明を省略する。本実施例は、先の実施例では電源スイッチ１の投 入と同時にタイマー回路２が作動してセンサ電極６ｂ，６ｃ間に電圧ＶP を加え るようにしたが、センサ電極電源４を乾電池４′に換えて、電圧ＶP の印加を手 動でおこなうようにしたものである。すなわち、図５に示すように、乾電池４′ の電圧を可変抵抗器Ｒ0 で所定の一定電圧にして、スイッチ９により一定時間だ けセンサ電極６の電極６ｂ，６ｃ間に印加するようにしたものである。このとき 、電圧ＶP を３５０ｍＶとして印加時間を１０秒とすれば、先の実施例と全く同 じ結果が得られる。なお、この実施例は先のもの比べて製造コストの軽減が図れ る。Next, another embodiment will be described. Note that circuit components that are the same as those in the previous embodiment are given the same reference numerals and their explanations will be omitted. In the present embodiment, the timer circuit 2 operates at the same time as the power switch 1 is turned on to apply the voltage V P between the sensor electrodes 6b and 6c in the previous embodiment, but the sensor electrode power source 4 is replaced by a dry battery 4'. Instead, the voltage V P is applied manually. That is, as shown in FIG. 5, the voltage of the dry battery 4' is set to a predetermined constant voltage by a variable resistor R0 , and the voltage is applied between the electrodes 6b and 6c of the sensor electrode 6 for a certain period of time by a switch 9. It is. At this time, if the voltage V P is 350 mV and the application time is 10 seconds, exactly the same results as in the previous example can be obtained. It should be noted that this embodiment can reduce the manufacturing cost compared to the previous one.
【００１９】[0019]
以上説明したように、本考案によると、センサ電極間に生じる起電力と同極性 の電圧を該センサ電極間に印加するようにしたので、センサ出力電圧の安定化時 間を大幅に短縮ができ、精度の有る炭酸ガス濃度の測定を短時間で行うことがで きる。 As explained above, according to the present invention, the electromotive force generated between the sensor electrodes has the same polarity as the electromotive force generated between the sensor electrodes. Since the voltage is applied between the sensor electrodes, when the sensor output voltage is stabilized, This greatly reduces the time required to measure carbon dioxide concentration with high accuracy. Wear.
【提出日】平成３年８月２９日[Submission date] August 29, 1991
【手続補正１】[Procedural amendment 1]
【補正対象書類名】明細書[Name of document to be amended] Specification
【補正対象項目名】０００２[Correction target item name] 0002
【補正方法】変更[Correction method] Change
【０００２】0002
従来、雰囲気中に存在するガス成分を検出するセンサの一つとして固体電解質 型センサがある。該センサは、通常、イオン伝導体である固体電解質を挟んだ形 で検知電極と基準電極とを有するセンサ電極を備えている。該固体電解質として は特定のイオンが移動するイオン伝導体を用い、検知電極と基準電極には白金等 の金属を用いている。そして、これらの電極に、先の特定のイオンと検知目的の ガス成分との両者を含む化合物を被覆して、一方だけが被検ガスに接触するよう にして加熱し、両電極間に生じる起電力を計測してガス濃度を検出している。 Traditionally, solid electrolytes have been used as a sensor to detect gas components present in the atmosphere. There is a type sensor. The sensor usually has a solid electrolyte sandwiched between them, which is an ionic conductor. and a sensor electrode having a sensing electrode and a reference electrode. As the solid electrolyte uses an ion conductor through which specific ions move, and the detection electrode and reference electrode are made of platinum, etc. metal is used. These electrodes are then charged with the specific ion and the object of detection. A compound containing both the gas component and the gas component is coated so that only one side comes into contact with the test gas. The gas concentration is detected by heating the gas and measuring the electromotive force generated between the two electrodes.
【図１】本考案実施例の固体電解質型炭酸ガスセンサの
電気回路を示す図である。FIG. 1 is a diagram showing an electric circuit of a solid electrolyte carbon dioxide sensor according to an embodiment of the present invention.
【図２】電源投入後の経過時間と出力電圧との関係を示
す図である。FIG. 2 is a diagram showing the relationship between elapsed time after power-on and output voltage.
【図３】従来の固体電解質型炭酸ガスセンサの電源投入
後の経過時間と出力電圧との関係を示す図である。FIG. 3 is a diagram showing the relationship between the elapsed time after power-on and the output voltage of a conventional solid electrolyte carbon dioxide sensor.
【図４】センサ電極電源に乾電池を用いた場合の電源投
入後の経過時間と出力電圧との関係を示す図である。FIG. 4 is a diagram showing the relationship between the elapsed time after power-on and the output voltage when a dry cell battery is used as the sensor electrode power source.
【図５】本考案の他の実施例に係る固体電解質型炭酸ガ
スセンサの電気回路を示す図である。FIG. 5 is a diagram showing an electric circuit of a solid electrolyte carbon dioxide sensor according to another embodiment of the present invention.
６ｂ，６ｃ センサ電極 ６ａ 加熱手段（ヒータ） １０ 初期安定化手段 6b, 6c sensor electrode 6a Heating means (heater) 10 Initial stabilization means
Claims (2)
イオン伝導体を挟んで対向する二個の電極からなり、接
触する炭酸ガスの濃度に対応して起電力を発生するセン
サ電極と、該センサ電極を加熱する加熱手段と、該セン
サ電極間に発生する起電力と同一極性の一定電圧を一定
時間該センサ電極間に印加する初期安定化手段とを備え
たことを特徴とする固体電解質型炭酸ガスセンサ。1. A sensor electrode consisting of an ionic conductor made of a solid electrolyte and two electrodes facing each other with the ionic conductor in between, which generates an electromotive force in response to the concentration of carbon dioxide gas with which it comes into contact; A solid electrolyte type characterized by comprising a heating means for heating a sensor electrode, and an initial stabilization means for applying a constant voltage of the same polarity as the electromotive force generated between the sensor electrodes for a certain period of time between the sensor electrodes. Carbon dioxide sensor.
始と同時に前記初期安定化手段によりセンサ電極間に電
圧を印加するようにしたことを特徴とする請求項１記載
の固体電解質型炭酸ガスセンサ。2. The solid electrolyte carbon dioxide sensor according to claim 1, wherein the initial stabilizing means applies a voltage between the sensor electrodes at the same time as the heating means starts heating the sensor electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2963891U JP2508277Y2 (en) | 1991-04-26 | 1991-04-26 | Solid electrolyte type carbon dioxide sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2963891U JP2508277Y2 (en) | 1991-04-26 | 1991-04-26 | Solid electrolyte type carbon dioxide sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04124455U true JPH04124455U (en) | 1992-11-12 |
| JP2508277Y2 JP2508277Y2 (en) | 1996-08-21 |
Family
ID=31913462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2963891U Expired - Fee Related JP2508277Y2 (en) | 1991-04-26 | 1991-04-26 | Solid electrolyte type carbon dioxide sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508277Y2 (en) |
-
1991
- 1991-04-26 JP JP2963891U patent/JP2508277Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2508277Y2 (en) | 1996-08-21 |
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