JPH041440U - - Google Patents
Info
- Publication number
- JPH041440U JPH041440U JP4119790U JP4119790U JPH041440U JP H041440 U JPH041440 U JP H041440U JP 4119790 U JP4119790 U JP 4119790U JP 4119790 U JP4119790 U JP 4119790U JP H041440 U JPH041440 U JP H041440U
- Authority
- JP
- Japan
- Prior art keywords
- humidity
- circuit
- humidity sensor
- frequency conversion
- changes
- 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
- 238000006243 chemical reaction Methods 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- 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
第１図は、本考案の１実施例の電源回路、第２
図は、電源電圧依存性の実測例、第３図は、従来
の湿度センサの説明図、第４図は、従来の湿度セ
ンサの回路例(1)、第５図は、従来の湿度センサ
の回路例(2)、を示した図である。
ＲＳ……抵抗（直列抵抗）、ＣＳ……コンデン
サ、ＩＮ……電源入力端子。
FIG. 1 shows a power supply circuit according to one embodiment of the present invention, and a second
The figure shows an actual measurement example of power supply voltage dependence, Figure 3 is an explanatory diagram of a conventional humidity sensor, Figure 4 is a circuit example (1) of a conventional humidity sensor, and Figure 5 is a diagram of a conventional humidity sensor. FIG. 3 is a diagram showing a circuit example (2). RS...Resistor (series resistance), CS...Capacitor, IN...Power input terminal.
Claims (1)
スが変化する湿度センサ素子ＨＳを用い、湿度の
変化を周波数の変化に変換する湿度−周波数変換
回路１と、 前記湿度−周波数変換回路１の出力信号を微分
して、前記信号よりも幅の狭いパルス列を出力す
る微分回路２と、 前記微分回路２の出力信号から不要成分を取り
除いたパルス列を積分する積分回路４と、 前記微分回路の一部に設け、積分回路の出力電
圧で制御を行う電圧制御可変インピーダンス素子
５とから成る湿度センサにおいて、 上記湿度センサの電源回路に、電源と直列接続
した抵抗ＲＳを設けたことを特徴とする湿度セン
サ。 (2) 相対湿度に対して非直線的にインピーダン
スが変化する湿度センサ素子ＨＳを用い、湿度の
変化を周波数の変化に変換する湿度−周波数変換
回路１と、 前記湿度−周波数変換回路１の出力信号を微分
して、前記信号よりも幅の狭いパルス列を出力す
る微分回路２と、 前記微分回路２の出力信号から不要成分を取り
除いたパルス列を積分する積分回路４と、 前記微分回路の一部に設け、積分回路の出力電
圧で制御を行う電圧制御可変インピーダンス素子
５と、 前記積分回路の出力側に接続し、サーミスタＴ
Ｈにより構成した温度補償回路６とを設け、 更に前記湿度−周波数変換回路１の湿度センサ
素子ＨＳと直列に、該湿度センサ素子ＨＳの高湿
度側における特性補正用の抵抗として、サーミス
タＴＨ０を接続することにより、温度補償を行つ
た湿度センサにおいて、 上記湿度センサの電源回路に、電源と直列接続
した抵抗ＲＳを設けたことを特徴とする湿度セン
サ。[Claims for Utility Model Registration] (1) A humidity-frequency conversion circuit 1 that converts changes in humidity into changes in frequency using a humidity sensor element HS whose impedance changes non-linearly with respect to relative humidity; A differentiating circuit 2 that differentiates the output signal of the humidity-frequency conversion circuit 1 and outputs a pulse train having a narrower width than the signal; and an integrating circuit 4 that integrates the pulse train from which unnecessary components have been removed from the output signal of the differentiating circuit 2. and a voltage-controlled variable impedance element 5 provided as a part of the differentiating circuit and controlled by the output voltage of the integrating circuit, wherein a resistor RS connected in series with the power supply is provided in the power supply circuit of the humidity sensor. A humidity sensor characterized by: (2) a humidity-frequency conversion circuit 1 that converts changes in humidity into changes in frequency using a humidity sensor element HS whose impedance changes non-linearly with respect to relative humidity; and an output of the humidity-frequency conversion circuit 1. a differentiating circuit 2 that differentiates a signal and outputs a pulse train having a narrower width than the signal; an integrating circuit 4 that integrates a pulse train obtained by removing unnecessary components from the output signal of the differentiating circuit 2; and a part of the differentiating circuit. a voltage controlled variable impedance element 5 which is provided on the output side of the integrating circuit and is controlled by the output voltage of the integrating circuit; and a thermistor T which is connected to the output side of the integrating circuit.
Furthermore, a thermistor TH 0 is provided in series with the humidity sensor element HS of the humidity-frequency conversion circuit 1 as a resistor for correcting the characteristics of the humidity sensor element HS on the high humidity side. A humidity sensor that performs temperature compensation by being connected to the humidity sensor, characterized in that a resistor RS connected in series with a power supply is provided in a power supply circuit of the humidity sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4119790U JPH074561Y2 (en) | 1990-04-18 | 1990-04-18 | Humidity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4119790U JPH074561Y2 (en) | 1990-04-18 | 1990-04-18 | Humidity sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH041440U true JPH041440U (en) | 1992-01-08 |
| JPH074561Y2 JPH074561Y2 (en) | 1995-02-01 |
Family
ID=31551661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4119790U Expired - Lifetime JPH074561Y2 (en) | 1990-04-18 | 1990-04-18 | Humidity sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH074561Y2 (en) |
-
1990
- 1990-04-18 JP JP4119790U patent/JPH074561Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH074561Y2 (en) | 1995-02-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |