JPH0418782B2 - - Google Patents
Info
- Publication number
- JPH0418782B2 JPH0418782B2 JP59279158A JP27915884A JPH0418782B2 JP H0418782 B2 JPH0418782 B2 JP H0418782B2 JP 59279158 A JP59279158 A JP 59279158A JP 27915884 A JP27915884 A JP 27915884A JP H0418782 B2 JPH0418782 B2 JP H0418782B2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- humidity
- charging
- measuring device
- refresh
- 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 - Lifetime
Links
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 By The Use Of Fluid Adsorption Or Reactions (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
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
フレツシユ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.
［発明の技術的背景］
加熱リフレツシユ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ツシユする必要がある。そ
してリフレツシユ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ツ
チを挿入し、別設されたタイマによつて切換スイ
ツチをオン・オフすることにより、所定時間毎に
ヒータに通電し、加熱エネルギによつて湿度セン
サをリフレツシユする方式が一般的であつた。[Technical Background of the Invention] A humidity measuring device using a heating refresh type humidity sensor needs to refresh the humidity sensor portion in order to ensure detection accuracy. A heater is used as a means for refreshing, and by inserting a changeover switch between the power supply circuit and the heater, and turning the changeover switch on and off using a separate timer, the heater can be turned on and off at predetermined intervals. A common method was to apply electricity to the humidity sensor and 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つては、
通常の湿度測定時に必要な電源容量に加えて、リ
フレツシユ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、電池を電源とする場合におい
ては、リフレツシユ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つていた。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 with the background art] In the humidity measuring device according to the above-mentioned conventional method,
In addition to the power supply capacity required for normal humidity measurement, the power supply capacity required for refreshing must be ensured, which increases the size and weight of the device. Furthermore, when a battery is used as a power source, it is necessary to obtain a sufficient discharge current during refreshing, which precludes the use of small batteries, which 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ツシユ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 is equipped with a means that can cover the refresh power source capacity 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電流にて
コンデンサを充電しておき、これをリフレツシユ
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 energize the capacitor with a small current. The idea is to secure sufficient heating energy by charging the battery and discharging it for a short time during refreshing.
［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ツク
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。７はリフレツシユ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８
が付設されている。そして電源部８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、切換スイツチ１２及び制御回路１３か
ら構成されている。 In Figure 1, 1 is a humidity sensor, 2 is a power supply,
Reference numeral 3 denotes an amplifier, which amplifies the amount detected by the humidity sensor 1. 4 is a temperature detection section, for example, a thermistor is used. Reference numeral 5 denotes an arithmetic circuit which inputs the detection output from the amplifier 3 and the detection output from the temperature detection section 4, performs temperature compensation, and linearly converts these outputs. 6 is a display device. Reference numeral 7 denotes a refresh heater, which is provided close to the humidity sensor 1 .
is attached. The power supply unit 8 is composed of a capacitor 9 (eg, 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によつて増
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つている。 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, and then temperature compensated by the arithmetic circuit 5 and displayed on the display device 6.
一方、リフレツシユのための電源部では、湿度
の計測状態時には、切換スイツチ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。そしてこの充電期間中の充電電流は電流制
限回路１１によつ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。リフレツシユ時になると制
御回路１３は切換スイツチ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つてヒー
タ７を加熱する。なお、以上の動作は繰返して行
なわれる。 On the other hand, in the power supply unit for refreshing, the changeover switch 12 is connected to the contact b 1 side when the humidity is being measured, and the charging current from the power supply 10 charges the capacitor 9 via the current limiting circuit 11. There is. 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 the time of refresh, the control circuit 13 switches the changeover switch 12 from the contact b 1 to the a 1 side, discharges the 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 FIG. 2, parts that are the same as those in FIG. 1 are given the same reference numerals and explanations 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ツチ（連
動）１２，１２ａ，１２ｂが充電側（b1，b2，
b3）に切換えられ、従つてコンデンサ９ａ，９ｂ
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によつて制限さ
れている。そしてリフレツシユ時になると、制御
回路１３によつて各切換スイツチ１２，１２ａ，
１２ｂは連動して放電側（a1，a2，a3）に切換え
られ、各コンデンサ９ａ，９ｂは直列となつて放
電する。従つて放電電圧は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ツシユが
可能となる。 In FIG. 2, capacitors 9a and 9b are arranged in parallel, and in the measurement state, each changeover switch (interlocking) 12, 12a, 12b is on the charging side (b 1 , b 2 ,
b 3 ) and therefore capacitors 9a, 9b
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. When it is time to refresh, the control circuit 13 switches each changeover switch 12, 12a,
12b are switched to the discharge side (a 1 , a 2 , a 3 ) in conjunction with each other, and each capacitor 9a, 9b is connected in series and discharged. 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
えばニツケル・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。 Although the above embodiment describes the case of charging a capacitor, it is also possible to use a small secondary battery with low internal resistance, such as a nickel-cadmium battery, in place of a capacitor, and in this case as well, it is possible to charge the capacitor repeatedly. Of course, charging and discharging is possible.
［発明の効果］
以上説明した如く、本発明によればリフレツシ
ユ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、リフレツシユ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ツシ
ユ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 power source for refreshing, and the capacitor is charged at the time of measurement and discharged at the time of refreshing. It is possible to provide a humidity measuring device in which the refresh conditions can be kept constant simply by keeping the terminal voltage constant at the end of charging, and which 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…リフレツシユ用電源
部、９，９ａ，９ｂ…コンデンサ、１１…電流制
限回路、１２，１２ａ，１２ｂ…切換スイツチ、
１３…制御回路。
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. DESCRIPTION OF SYMBOLS 1... Humidity sensor, 2, 10... Power supply, 3... Amplifier, 4... Temperature detection section, 5... Arithmetic circuit, 6... Display device, 7... Heater, 8 , 8a ... Refresh power supply section, 9, 9a, 9b... Capacitor, 11... Current limiting circuit, 12, 12a, 12b... Changeover switch,
13...Control circuit.
Claims (1)
とにより湿度センサをリフレツシユする湿度測定
装置において、リフレツシユ用ヒータ電源に対し
て切換装置を介して並列に充電装置を設け、湿度
センサによる計測状態時には切換装置を電源側に
切換えて前記充電装置を充電状態とすると共に、
リフレツシユ時には切換装置をヒータ側に切換え
て放電させるよう制御することを特徴とする湿度
測定装置。 ２ 充電装置は複数個のコンデンサであることを
特徴とする特許請求の範囲第１項記載の湿度測定
装置。 ３ 充電装置は２次電池であることを特徴とする
特許請求の範囲第１項記載の湿度測定装置。[Claims] 1. In a humidity measuring device that refreshes a humidity sensor by intermittently heating a refresh heater, a charging device is provided in parallel to the refresh heater power source via a switching device, and the humidity sensor In the measurement state, the switching device is switched to the power source side to put the charging device in the charging state, and
A humidity measuring device characterized in that during refreshing, a switching device is switched to the heater side to control the discharge. 2. The humidity measuring device according to claim 1, wherein the charging device is a plurality of capacitors. 3. The humidity measuring device according to claim 1, wherein the charging device is a secondary battery.
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 JPS61159144A (en) | 1986-07-18 |
| JPH0418782B2 true 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327574A (en) * | 1995-02-28 | 1996-12-13 | Vickers Inc | Particle detection and breakage in hydraulic system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2577231B2 (en) * | 1987-09-30 | 1997-01-29 | キヤノン株式会社 | Image forming device |
| JP2717423B2 (en) * | 1988-10-29 | 1998-02-18 | 富士重工業株式会社 | Defrost prevention device for vehicle windshield |
| JP2717422B2 (en) * | 1988-10-29 | 1998-02-18 | 富士重工業株式会社 | Defrost prevention device for vehicle windshield |
Family Cites Families (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
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08327574A (en) * | 1995-02-28 | 1996-12-13 | Vickers Inc | Particle detection and breakage in hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61159144A (en) | 1986-07-18 |
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