JPS61159144A - Measuring instrument for humidity - Google Patents
Measuring instrument for humidityInfo
- Publication number
- JPS61159144A JPS61159144A JP27915884A JP27915884A JPS61159144A JP S61159144 A JPS61159144 A JP S61159144A JP 27915884 A JP27915884 A JP 27915884A JP 27915884 A JP27915884 A JP 27915884A JP S61159144 A JPS61159144 A JP S61159144A
- Authority
- JP
- Japan
- Prior art keywords
- capacitor
- humidity
- power source
- charging
- current
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 24
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (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)
Abstract
Description
【発明の詳細な説明】
[発明の技術分野]
本発明は、湿度測定装置、特に湿度センサのリフレッシ
ュ用電源としてコンデンサに蓄積された電荷を使用する
ようにした湿度測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a humidity measuring device, and particularly to a humidity measuring device that uses electric charge stored in a capacitor as a power source for refreshing a humidity sensor.
[発明の技術的前II]
加熱リフレッシュ型の湿度センサを用いた湿度測定装置
は、その検出精度を確保するために、湿度センサ部分を
リフレッシュする必要がある。そしてリフレッシュのた
めの手段としてはヒータが用いられ、電源回路とヒータ
との間に切換スイッチを挿入し、別設されたタイマによ
って切換スイッチをオン・オフすることにより、所定時
間毎にヒータに通電し、加熱エネルギによって湿度セン
サをリフレッシュする方式が一般的であった。[Technical Preface of the Invention II] A humidity measuring device using a heat-refresh type humidity sensor needs to refresh the humidity sensor portion in order to ensure its detection accuracy. A heater is used as a means for refreshing, and a changeover switch is inserted between the power supply circuit and the heater, and a separate timer turns the changeover switch on and off to energize the heater at predetermined intervals. However, it has been common practice to refresh the humidity sensor using heating energy.
[背景技術の問題点]
上記従来方式による湿度測定装置にあっては、通常の湿
度測定時に必要な電源容量に加えて、リフレッシュ時に
必要な電源容量を確保しなければならず、そのために装
置が大型化し重量も増大することとなる。又、電池をM
′11とする場合においては、リフレッシュ時に十分な
放電電流を得る必要があるため、小型の電池を使用する
ことができず、可搬性を損なう要因となっていた。更に
一定の加熱条件を得るためにヒータへの通電時間制御を
する必要があり、そのためにタイマを要していた。[Problems in the background art] In the humidity measuring device according to the conventional method described above, in addition to the power supply capacity required for normal humidity measurement, it is necessary to secure the power supply capacity necessary for refreshing, and for this purpose, the device is This results in an increase in size and weight. Also, the battery is M
In the case of '11, it is necessary to obtain a sufficient discharge current at the time of refreshing, so a small battery cannot be used, which is a factor that impairs portability. Furthermore, in order to obtain constant heating conditions, it is necessary to control the time when electricity is applied to the heater, which requires a timer.
[発明の目的]
本発明は上記問題点を解決するためになされたものであ
り、特に別設された電源を要せず、かつ簡単な構成でリ
フレッシュ用電源容量を賄える手段を備えた湿度測定装
置を提供することを目的としている。[Object of the Invention] The present invention has been made to solve the above-mentioned problems, and provides a humidity measurement device that does not particularly require a separate power source and has a means that can cover the power supply capacity for refreshing with a simple configuration. The purpose is to provide equipment.
[発明の概要]
本発明では、装置が計測状態にある時間に比してヒータ
に通電する時間が僅かであることに着目し、この長時間
の計測時間を利用して小II流にてコンデンサを充電し
ておき、これをリフレッシュ時の短時間に放電すること
により十分な加熱エネルギを確保しようとするものであ
る。[Summary of the Invention] The present invention focuses on the fact that the time when the heater is energized is short compared to the time when the device is in the measurement state, and uses this long measurement time to measure the capacitor in the small II flow. The idea is to secure sufficient heating energy by charging the battery and discharging it for a short time during refresh.
[発明の実施例]
以下図面を参照して実施例を説明する。第1図は本発明
による湿度測定装置の一実施例ブロック図である。[Embodiments of the Invention] Examples will be described below with reference to the drawings. FIG. 1 is a block diagram of an embodiment of a humidity measuring device according to the present invention.
第1図において、1は湿度センサ、2は電源、3は増幅
器であり、湿度センサ1による検出量を増幅する。4は
温度検知部であり、例えばサーミスタが用いられる。5
は演算回路で増幅器3からの検知出力と温度検知部4か
らの検知出力とが夫々入力されて温度補償が行なわれる
と共に、これらの出力を線形変換する。6は表示装置で
ある。In FIG. 1, 1 is a humidity sensor, 2 is a power supply, and 3 is an amplifier, which amplifies the amount detected by the humidity sensor 1. 4 is a temperature detection section, for example, a thermistor is used. 5
is an arithmetic circuit in which the detection output from the amplifier 3 and the detection output from the temperature detection unit 4 are respectively input, temperature compensation is performed, and these outputs are linearly converted. 6 is a display device.
7はリフレッシュ用ヒータで湿度センサ1に近接して設
けられ、このヒータに対して電源部旦が付設されている
。そして電源部旦はコンデンサ9(例えば電気2重層型
)、電源10、電流制限回路11、切換スイッチ12及
び制御回路13から構成されている。Reference numeral 7 denotes a refresh heater, which is provided close to the humidity sensor 1, and a power supply unit is attached to this heater. The power supply section includes a capacitor 9 (for example, electric double layer type), a power supply 10, a current limiting circuit 11, a changeover switch 12, and a control circuit 13.
次に一連の動作説明をする。先ず湿度の検知は湿度セン
サ1による検出量が増幅器3によって増幅され、これが
演算回路5にて温度補償されて表示装置6に表示される
公知の動作となっている。Next, a series of operations will be explained. First, the humidity is detected by a known operation in which the amount detected by the humidity sensor 1 is amplified by the amplifier 3, temperature compensated by the arithmetic circuit 5, and displayed on the display device 6.
一方、リフレッシュのための電源部では、湿度の計測状
態時には、切換スイッチ12が接点b1側に接続されて
おり、電源10からの充電電流は電流制限回路11を介
してコンデンサ9を充電している。On the other hand, in the power supply unit for refreshing, when the humidity is being measured, the changeover switch 12 is connected to the contact b1 side, and the charging current from the power supply 10 charges the capacitor 9 via the current limiting circuit 11. .
そしてこの充電期間中の充電電流は電流制限回路11に
よって小電流に制御されており、この期間中にコンデン
サ9は長時間をかけて十分な量の電荷を蓄積する。リフ
レッシュ時になると制御回路13は切換スイッチ12を
接点b1からa1側へ切換え、コンデンサ9に蓄積され
た電荷をヒータ7に放電し、この放電エネルギーによっ
てヒータ7を加熱する。なお、以上の動作は繰返して行
なわれる。The charging current during this charging period is controlled to a small current by the current limiting circuit 11, and the capacitor 9 accumulates a sufficient amount of charge over a long period of time during this period. At refresh time, the control circuit 13 switches the changeover switch 12 from the contact b1 to the a1 side, discharges the electric charge accumulated in the capacitor 9 to the heater 7, and heats the heater 7 with this discharge energy. Note that the above operations are repeated.
第2図は本発明による湿度測定装置の他の実施例である
。FIG. 2 shows another embodiment of the humidity measuring device according to the present invention.
本実施例では低い電源電圧を用いてヒータが必要とする
高い電圧を得ようとするものである。第2図において、
第1図と同一部分については同一符号を付して説明を省
略する。This embodiment attempts to obtain the high voltage required by the heater using a low power supply voltage. In Figure 2,
Components that are the same as those in FIG. 1 are designated by the same reference numerals and their description will be omitted.
第2図において、9a、9bはコンデンサで並列配置さ
れ、計測状態では各切換スイッチ(連動)12.12a
、 12bが充電側(bl、bl、b3)に切換えられ
、従ってコンデンサ9a19bは電源10に対して並列
接続されて規定電圧まで充電される。この場合も前記し
た実施例と同様に、充電電流は電流制限回路11によっ
て制限されている。そしてリフレッシュ時になると、制
御回路13によって各切換スイッチ12.12a、 1
2bは連動して放電側(al、a2 、a:+ )に切
換えられ、各コンデンサ9a、’9bは直列となって放
電する。従って放電電圧は2倍の端子電圧となり、速や
かな加熱ができて十分なリフレッシュが可能となる。In Figure 2, 9a and 9b are capacitors arranged in parallel, and in the measurement state each changeover switch (interlocking) 12.12a
, 12b are switched to the charging side (bl, bl, b3), and therefore the capacitor 9a19b is connected in parallel to the power supply 10 and charged to a specified voltage. In this case as well, the charging current is limited by the current limiting circuit 11, similar to the embodiment described above. Then, when it is time to refresh, the control circuit 13 switches each changeover switch 12.12a, 1
2b are switched to the discharging side (al, a2, a:+) in conjunction with each other, and each capacitor 9a, '9b is discharged in series. Therefore, the discharge voltage becomes twice the terminal voltage, allowing rapid heating and sufficient refreshing.
なお、上記実施例ではコンデンサを2個並列に設ける場
合について説明したが、これに限定されるものではなく
、必要に応じて任意の個数としても良いことは明らかで
ある。In the above embodiment, the case where two capacitors are provided in parallel has been described, but the present invention is not limited to this, and it is clear that any number of capacitors may be used as required.
なお、上記実施例ではコンデンサを充電する場合につい
て説明したが、コンデンサの代りに、例えばニッケル・
カドミウムの電池等の小型で内部抵抗の小さい2次電池
を用いることも可能であり、この場合も繰返し充放電が
可能であることは勿論である。In the above embodiment, the case of charging the capacitor was explained, but instead of the capacitor, for example, a nickel
It is also possible to use a secondary battery that is small and has low internal resistance, such as a cadmium battery, and it goes without saying that repeated charging and discharging is possible in this case as well.
[発明の効果]
以上説明した如く、本発明によればリフレッシュ用電源
としてコンデンサを使用して計測時に充電しておき、リ
フレッシュ時に放電するよう構成したので、小型、軽量
、安価は勿論のこと、充電終了時の端子電圧を一定にす
るだけでリフレッシュ条件を一定にはもつことができ、
かつ通電時間を制御するタイマも不要な湿度測定装置を
提供できる。[Effects of the Invention] As explained above, according to the present invention, a capacitor is used as a refresh power source and is charged at the time of measurement and discharged at the time of refresh. By simply keeping the terminal voltage constant at the end of charging, the refresh conditions can be kept constant.
Moreover, it is possible to provide a humidity measuring device that does not require a timer to control the energization time.
第1図は本発明による湿度測定装置の一実施例の構成図
、第2図は他の実施例図である。
1・・・湿度センサ 2.10・・・電源3・
・・増幅器 4・・・温度検知部5・・・
演算回路 6・・・表示装置7・・・ヒータ
8.8a・・・リフレッシュ用NI!1部9.9a、9
b・・・コンデンサ 11・・・電流制限回路12.1
2a、12b ・・・切換スイッチ13・・・制御回路
尾1区FIG. 1 is a block diagram of one embodiment of a humidity measuring device according to the present invention, and FIG. 2 is a diagram of another embodiment. 1... Humidity sensor 2.10... Power supply 3.
...Amplifier 4...Temperature detection section 5...
Arithmetic circuit 6...Display device 7...Heater 8.8a...NI for refresh! Part 1 9.9a, 9
b...Capacitor 11...Current limiting circuit 12.1
2a, 12b ... Selector switch 13 ... Control circuit tail 1 section
Claims (3)
より湿度センサをリフレッシュする湿度測定装置におい
て、リフレッシュ用ヒータ電源に対して並列にコンデン
サを設け、湿度センサによる計測状態時に前記コンデン
サを充電状態とすると共に、リフレッシュ時に放電せし
めるよう切換制御することを特徴とする湿度測定装置。(1) In a humidity measuring device that refreshes a humidity sensor by intermittently heating a refresh heater, a capacitor is provided in parallel with the refresh heater power supply, and the capacitor is charged when the humidity sensor is in a measurement state. Additionally, a humidity measuring device is characterized in that switching control is performed so that the discharge occurs during refreshing.
デンサを並列に設けたことを特徴とする特許請求の範囲
第1項記載の湿度測定装置。(2) The humidity measuring device according to claim 1, characterized in that a plurality of capacitors are provided in parallel to the refresh heater power source.
する特許請求の範囲第1項記載の湿度測定装置。(3) The humidity measuring device according to claim 1, characterized in that a secondary battery is used in place of the capacitor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27915884A JPS61159144A (en) | 1984-12-29 | 1984-12-29 | Measuring instrument for humidity |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP27915884A JPS61159144A (en) | 1984-12-29 | 1984-12-29 | Measuring instrument for humidity |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS61159144A true JPS61159144A (en) | 1986-07-18 |
JPH0418782B2 JPH0418782B2 (en) | 1992-03-27 |
Family
ID=17607256
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP27915884A Granted JPS61159144A (en) | 1984-12-29 | 1984-12-29 | Measuring instrument for humidity |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61159144A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6488145A (en) * | 1987-09-30 | 1989-04-03 | Canon Kk | Humidity measuring instrument |
JPH02120156A (en) * | 1988-10-29 | 1990-05-08 | Fuji Heavy Ind Ltd | Frosting preventer for car windshield |
JPH02120157A (en) * | 1988-10-29 | 1990-05-08 | Fuji Heavy Ind Ltd | Frosting preventer for car windshield |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5742234A (en) * | 1995-02-28 | 1998-04-21 | Vickers, Inc. | Particle detection and destruction in fluid systems |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59185657U (en) * | 1983-05-30 | 1984-12-10 | 松下電器産業株式会社 | humidity detection device |
-
1984
- 1984-12-29 JP JP27915884A patent/JPS61159144A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59185657U (en) * | 1983-05-30 | 1984-12-10 | 松下電器産業株式会社 | humidity detection device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6488145A (en) * | 1987-09-30 | 1989-04-03 | Canon Kk | Humidity measuring instrument |
JPH02120156A (en) * | 1988-10-29 | 1990-05-08 | Fuji Heavy Ind Ltd | Frosting preventer for car windshield |
JPH02120157A (en) * | 1988-10-29 | 1990-05-08 | Fuji Heavy Ind Ltd | Frosting preventer for car windshield |
Also Published As
Publication number | Publication date |
---|---|
JPH0418782B2 (en) | 1992-03-27 |
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