JPS6112541B2 - - Google Patents
Info
- Publication number
- JPS6112541B2 JPS6112541B2 JP55092073A JP9207380A JPS6112541B2 JP S6112541 B2 JPS6112541 B2 JP S6112541B2 JP 55092073 A JP55092073 A JP 55092073A JP 9207380 A JP9207380 A JP 9207380A JP S6112541 B2 JPS6112541 B2 JP S6112541B2
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- sensitive resistor
- resistor
- variable resistor
- switch
- 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
- 238000011069 regeneration method Methods 0.000 claims description 17
- 230000008929 regeneration Effects 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001364 causal effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Non-Adjustable Resistors (AREA)
Description
【発明の詳細な説明】
本発明は経時変化により劣化したセラミツク感
湿抵抗体の再生装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for regenerating a ceramic moisture-sensitive resistor that has deteriorated over time.
現在高信頼性、長寿命の感湿抵抗体を得るべく
研究開発が進められてるがまだ満足すべきものが
得られない。このため特願昭55−64493号のよう
に感湿抵抗体にある程度以上の電圧を印加しまた
はある程度以上の電力を供給して感湿抵抗体自身
をジユール熱で発熱させることによつて再生する
方法も提案されている。しかしながらジユール熱
を利用した再生方法では再生に必要な電圧を印加
してから一定の時間経過すると感湿抵抗体の発熱
により抵抗値が低下しその分だけ電流が増加す
る。電流が増加すればさらに感湿抵抗体が発熱す
るという正帰還の因果関係が生じ急激な熱暴走の
現象をおこして瞬時に破壊にいたる場合がある。
このため感湿抵抗体自身を発熱体とする再生方法
は劣化した感湿抵抗体の特性を復帰させ再生する
という点では確かに有効であるが実用面で上述の
ような難点がある。 Research and development is currently underway to obtain a highly reliable, long-life moisture-sensitive resistor, but nothing satisfactory has yet been achieved. For this reason, as in Japanese Patent Application No. 55-64493, the humidity-sensitive resistor itself is regenerated by applying a voltage above a certain level or supplying power above a certain level to generate heat in the humidity-sensitive resistor itself using Joule heat. A method has also been proposed. However, in the regeneration method using Joule heat, after a certain period of time has elapsed after the voltage necessary for regeneration is applied, the resistance value decreases due to heat generation of the moisture-sensitive resistor, and the current increases by that amount. As the current increases, a positive feedback causal relationship occurs in which the humidity-sensitive resistor generates more heat, causing a sudden thermal runaway phenomenon that may lead to instantaneous destruction.
Therefore, although the regeneration method using the humidity-sensitive resistor itself as a heating element is certainly effective in restoring and regenerating the deteriorated characteristics of the humidity-sensitive resistor, it has the above-mentioned difficulties in practical terms.
本発明は上述のような実情に鑑みてなされたも
ので感湿抵抗体自身が発熱体となつて発熱しこれ
によつて感湿抵抗体を再生する再生装置において
感湿抵抗体の破壊によるトラブルをなくして再生
し得るセラミツク感湿抵抗体の再生装置を提供せ
んとするものである。 The present invention has been made in view of the above-mentioned circumstances, and in a regeneration device in which the humidity-sensitive resistor itself becomes a heating element and generates heat, thereby regenerating the humidity-sensitive resistor, troubles due to destruction of the humidity-sensitive resistor occur. It is an object of the present invention to provide a regeneration device for a ceramic moisture-sensitive resistor that can be regenerated without the need for regeneration.
以下本発明の実施例について詳述する。まず第
１図に示すように切換手段としてトグルスイツチ
１を用い該スイツチ１の被切換端子２，３は80V
以上の再生用交流電源、たとえば100V、50Hzの
交流電源および20V以下の測定用交流電源、たと
えば1V、120Hzの交流電源のそれぞれ一方の出力
端子に接続する。図中４はZnO−LiZnVO4，
MgCr2O4，Zn2TiO4またはMg2TiO4などを主成分
とするセラミツク感湿抵抗体、５は可変抵抗であ
る。このような構成において通常の湿度検出時に
は前記スイツチ１を３の側すなわち測定用交流電
源側に倒しておき可変抵抗５の抵抗値を一定にし
ておくと該可変抵抗５両端、すなわち検出端Ａ，
Ｂ間の検出電圧は湿度変化に応じて変動するため
この電圧を検出して湿度を検出することができ
る。さて感湿抵抗体４が劣化して再生する必要が
生じた場合には可変抵抗５の抵抗値を最大にして
からスイツチ１を２の再生用交流電源側に倒す。
これにより感湿抵抗体４はある程度発熱する。そ
して一定時間経過するか可変抵抗５両端Ａ，Ｂ間
の電圧が一定値に達したのち可変抵抗５の抵抗値
を徐々に下げると感湿抵抗体４は発熱を増しやが
て100℃以上に達する。再生用交流電源は80V以
上でないと感湿抵抗体４が発熱しないため再生で
きない。また測定用交流電源は20Vを超えると感
湿抵抗体４の電圧−電流特性の高湿雰囲気での直
線性がなくなるので20V以下が望ましい。このよ
うにして感湿抵抗体４を発熱させたのちスイツチ
１を３の測定用交流電源側に倒し抵抗値をもとの
一定値に戻せば再生は完了し再び湿度検出が可能
となる。上記実施例のような再生装置を用いれば
再生の際AC80V以上の電圧を印加するにあたつ
て感湿抵抗体４の直列抵抗たる可変抵抗５の抵抗
値を大きく設定することができ、このため感湿抵
抗体４にAC100Vが印加されて熱暴走がおこりか
かつても電流値は前記直列抵抗によつて一定値以
内におさえることができる。したがつて破壊にい
たるまで電流が増加し続けるという現象が回避さ
れる。そのため可変抵抗５の最大値は少なくとも
熱暴走を抑制するのに十分な大きさの抵抗値でな
ければならず、実施例では1KΩのものを用い
た。ところが可変抵抗５の抵抗値を最大のままに
しておくと発熱が不十分であつて再生するまでに
至らない。このような場合にはつぎの段階として
可変抵抗５の抵抗値を徐々に下げてゆつくりと発
熱量を増してやれば感湿抵抗体４が破壊すること
なく再生することができる。つぎに第２図に相対
湿度特性を示す。試料は直径8.5mmφ×厚さ0.3mm
ｔの焼結体に直径7.0mmφの金電極を設けたZnO
−LiZnVO4系セラミツク感湿抵抗体である。曲線
Ａは該感湿抵抗体の初期特性であり、曲線Ｂは常
温常湿の室内に放置して1000時間経過後の相対湿
度特性、曲線Ｃは前記曲線Ｂの室内に放置して
1000時間経過後の試料を本発明の実施例に係る第
１図に示す装置で再生したものの相対湿度特性を
示すものである。第２図から明らかなように本発
明の実施例に係る装置で再生したものの曲線Ｃの
特性はほとんど曲線Ａの初期特性と等しくなる。
このように本発明の再生装置で再生を行うことに
より感湿抵抗体を破壊することなく再生し初期特
性とほぼ等しい特性に復帰させることができ確実
に再生しうる効果がある。 Examples of the present invention will be described in detail below. First, as shown in Fig. 1, a toggle switch 1 is used as a switching means, and the terminals 2 and 3 to be switched are 80V.
Connect to one output terminal of each of the above-mentioned AC power sources for reproduction, such as a 100 V, 50 Hz AC power source, and measurement AC power sources of 20 V or less, such as 1 V, 120 Hz AC power sources. 4 in the figure is ZnO−LiZnVO 4 ,
A ceramic moisture-sensitive resistor whose main component is MgCr 2 O 4 , Zn 2 TiO 4 or Mg 2 TiO 4 , and 5 is a variable resistor. In such a configuration, during normal humidity detection, if the switch 1 is turned to the 3 side, that is, the measuring AC power supply side, and the resistance value of the variable resistor 5 is kept constant, both ends of the variable resistor 5, that is, the detection end A,
Since the detection voltage between B varies according to changes in humidity, humidity can be detected by detecting this voltage. Now, when the humidity sensitive resistor 4 deteriorates and needs to be regenerated, the resistance value of the variable resistor 5 is maximized, and then the switch 1 is turned to the regeneration AC power source side 2.
As a result, the humidity sensitive resistor 4 generates heat to some extent. Then, after a certain period of time has elapsed or the voltage between both ends A and B of the variable resistor 5 reaches a certain value, when the resistance value of the variable resistor 5 is gradually lowered, the humidity sensitive resistor 4 increases heat generation and eventually reaches 100° C. or more. Unless the regeneration AC power source is 80 V or higher, the humidity sensitive resistor 4 will not generate heat, and therefore regeneration cannot be performed. Furthermore, if the AC power supply for measurement exceeds 20V, the voltage-current characteristics of the humidity-sensitive resistor 4 will lose linearity in a high-humidity atmosphere, so it is desirable that the AC power supply be 20V or less. After the humidity-sensitive resistor 4 is made to generate heat in this manner, the switch 1 is turned to the measuring AC power supply side 3 to return the resistance value to the original constant value, and the regeneration is completed and humidity detection becomes possible again. If the reproducing device as in the above embodiment is used, the resistance value of the variable resistor 5, which is the series resistance of the moisture sensitive resistor 4, can be set to a large value when applying a voltage of 80 VAC or higher during reproducing. Even if thermal runaway occurs when 100 VAC is applied to the humidity sensitive resistor 4, the current value can be kept within a certain value by the series resistor. Therefore, the phenomenon in which the current continues to increase until destruction is avoided is avoided. Therefore, the maximum value of the variable resistor 5 must be at least a resistance value large enough to suppress thermal runaway, and in the example, a resistor of 1 KΩ was used. However, if the resistance value of the variable resistor 5 is left at the maximum value, heat generation is insufficient and regeneration does not occur. In such a case, as the next step, the resistance value of the variable resistor 5 is gradually lowered and the amount of heat generated is gradually increased, so that the moisture-sensitive resistor 4 can be regenerated without being destroyed. Next, Figure 2 shows the relative humidity characteristics. The sample is 8.5mm in diameter x 0.3mm in thickness.
ZnO with a gold electrode with a diameter of 7.0 mmφ on a sintered body of t.
- LiZnVO 4 ceramic moisture sensitive resistor. Curve A is the initial characteristic of the humidity-sensitive resistor, curve B is the relative humidity characteristic after 1000 hours after being left indoors at normal temperature and normal humidity, and curve C is the relative humidity characteristic after being left indoors at room temperature and humidity.
This figure shows the relative humidity characteristics of a sample after 1000 hours was regenerated using the apparatus shown in FIG. 1 according to the embodiment of the present invention. As is clear from FIG. 2, the characteristics of curve C reproduced by the apparatus according to the embodiment of the present invention are almost equal to the initial characteristics of curve A.
As described above, by performing regeneration using the regeneration apparatus of the present invention, it is possible to regenerate the moisture-sensitive resistor without destroying it and restore the characteristics to almost the same as the initial characteristics, thereby ensuring regeneration.
以上詳述したように本発明によればセラミツク
感湿抵抗体と再生用交流電源と測定用交流電源の
２個の交流電源と該電源を切換えるスイツチと前
記感湿抵抗体と直列に接続し他端を前記交流電源
に接続した可変抵抗とからなり、前記電源の一方
の出力端子をそれぞれ前記スイツチの被切換端子
に接続し該被切換端子を感湿抵抗体または可変抵
抗に接続し前記感湿抵抗体が劣化し再生する必要
が生じた場合、前記可変抵抗の抵抗値を最大にし
てから前記スイツチを再生用交流電源側に倒し感
湿抵抗体をある程度発熱させ一定時間経過するか
可変抵抗両端の電圧が一定値に達したのち可変抵
抗の抵抗値を徐々に下げて感湿抵抗体を発熱させ
ることによつて感湿抵抗体を破壊することなく再
生することができ初期特性とほぼ等しい特性に復
帰させ得るセラミツク感湿抵抗体の再生装置を提
供することができる。 As described in detail above, according to the present invention, a ceramic humidity-sensitive resistor, two AC power supplies, a reproduction AC power supply and a measurement AC power supply, a switch for switching the power supplies, and the humidity-sensitive resistor are connected in series. It consists of a variable resistor whose ends are connected to the AC power source, one output terminal of the power source is connected to a switched terminal of the switch, and the switched terminal is connected to a humidity sensing resistor or a variable resistor. When the resistor deteriorates and needs to be regenerated, the resistance value of the variable resistor is maximized, and then the switch is turned to the AC power source for regeneration, causing the humidity-sensitive resistor to generate some heat, and after a certain period of time has elapsed, the resistance value of the variable resistor is maximized. After the voltage reaches a certain value, the resistance value of the variable resistor is gradually lowered to generate heat in the humidity-sensitive resistor, so that the humidity-sensitive resistor can be regenerated without being destroyed, and the characteristics are almost equal to the initial characteristics. It is possible to provide a regeneration device for a ceramic moisture-sensitive resistor that can be restored to its original condition.
第１図は本発明の一実施例に係る再生装置の回
路図、第２図はセラミツク感湿抵抗体の相対湿度
特性を示す曲線図である。
１……トグルスイツチ、２，３……被切換端
子、４……感湿抵抗体、５……可変抵抗。
FIG. 1 is a circuit diagram of a reproducing device according to an embodiment of the present invention, and FIG. 2 is a curve diagram showing relative humidity characteristics of a ceramic humidity-sensitive resistor. 1...Toggle switch, 2, 3...Switched terminal, 4...Moisture sensitive resistor, 5...Variable resistor.
Claims (1)
２個の交流電源と、該電源を切換えるスイツチ
と、前記感湿抵抗体と直列に接続し他端を前記交
流電源に接続した可変抵抗とからなり、前記電源
の一方の出力端子をそれぞれ前記スイツチの被切
換端子に接続し前記感湿抵抗体が劣化し再生する
必要が生じた場合前記可変抵抗の抵抗値を最大に
してから前記スイツチを再生用交流電源側に倒し
前記感湿抵抗体をある程度発熱させ一定時間経過
するか前記可変抵抗両端の電圧が一定値に達した
のち該可変抵抗の抵抗値を徐々に下げて前記感湿
抵抗体を発熱させ再生するようにしたことを特徴
とするセラミツク感湿抵抗体の再生装置。1 A ceramic humidity-sensitive resistor, two AC power supplies for reproduction and measurement, a switch for switching the power supplies, and a variable resistor connected in series with the humidity-sensitive resistor and the other end connected to the AC power supply. One output terminal of the power supply is connected to the switched terminal of the switch, and when the humidity sensitive resistor deteriorates and needs to be regenerated, the resistance value of the variable resistor is maximized and then the switch is turned on. After a certain amount of heat is generated in the humidity-sensitive resistor by placing it on the side of the AC power supply for reproduction, or after a certain period of time has elapsed or the voltage across the variable resistor reaches a certain value, the resistance value of the variable resistor is gradually lowered and the humidity-sensitive resistor is turned off. 1. A regeneration device for a ceramic moisture-sensitive resistor, characterized in that it is regenerated by generating heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9207380A JPS5717104A (en) | 1980-07-04 | 1980-07-04 | Device for reproducing ceramic moisture sensitive resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9207380A JPS5717104A (en) | 1980-07-04 | 1980-07-04 | Device for reproducing ceramic moisture sensitive resistor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5717104A JPS5717104A (en) | 1982-01-28 |
| JPS6112541B2 true JPS6112541B2 (en) | 1986-04-09 |
Family
ID=14044274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9207380A Granted JPS5717104A (en) | 1980-07-04 | 1980-07-04 | Device for reproducing ceramic moisture sensitive resistor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5717104A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4591791B2 (en) * | 2008-01-29 | 2010-12-01 | ブラザー工業株式会社 | Humidity detection device and image forming apparatus provided with the humidity detection device |
| JP5991246B2 (en) | 2013-03-25 | 2016-09-14 | ブラザー工業株式会社 | SENSOR DEVICE, IMAGE FORMING DEVICE PROVIDED WITH SAME DEVICE, AND HUMIDITY DETECTION METHOD |
-
1980
- 1980-07-04 JP JP9207380A patent/JPS5717104A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717104A (en) | 1982-01-28 |
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