JPH0217652U - - Google Patents
Info
- Publication number
- JPH0217652U JPH0217652U JP9661388U JP9661388U JPH0217652U JP H0217652 U JPH0217652 U JP H0217652U JP 9661388 U JP9661388 U JP 9661388U JP 9661388 U JP9661388 U JP 9661388U JP H0217652 U JPH0217652 U JP H0217652U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- alcohol concentration
- circuit
- detection device
- integrated circuit
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000446 fuel Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Description
第１図は本考案実施例のアルコール濃度検出装
置を示す回路図、第２図は実施例装置のセンサ部
の構造を示す断面図、第３図は実施例装置の信号
の波形を示すタイムチヤート、第４図は実施例装
置の電圧―アルコール濃度特性を示すグラフであ
る。
１０…アルコール濃度センサ（センサ部）、１
１…内電極、１２…外電極、２０…第１発振回路
、２１…発振用集積回路、３０…第２発振回路、
３１…発振用集積回路、３２…遅延回路。
Fig. 1 is a circuit diagram showing an alcohol concentration detection device according to an embodiment of the present invention, Fig. 2 is a sectional view showing the structure of the sensor section of the embodiment device, and Fig. 3 is a time chart showing signal waveforms of the embodiment device. , FIG. 4 is a graph showing voltage-alcohol concentration characteristics of the example device. 10...Alcohol concentration sensor (sensor part), 1
DESCRIPTION OF SYMBOLS 1... Inner electrode, 12... Outer electrode, 20... First oscillation circuit, 21... Oscillation integrated circuit, 30... Second oscillation circuit,
31...Oscillation integrated circuit, 32...Delay circuit.
Claims (1)
から成り、この電極間の静電容量を検出するセン
サ部と、該センサ部で検出される静電容量に応じ
た変動周波数信号を出力する発振用集積回路を有
した発振回路とを備え、前記変動周波数に基づき
アルコール濃度を検出するようにしたアルコール
濃度検出装置において、 前記発振用集積回路に、起動時の発振を遅らせ
る遅延回路を設けたことを特徴とするアルコール
濃度検出装置。[Claims for Utility Model Registration] A sensor section that consists of a pair of electrodes immersed in an alcohol-containing fuel and detects the capacitance between the electrodes, and a variation according to the capacitance detected by the sensor section. An oscillation circuit having an oscillation integrated circuit that outputs a frequency signal, and an alcohol concentration detection device configured to detect alcohol concentration based on the fluctuating frequency, wherein the oscillation integrated circuit is configured to delay oscillation at startup. An alcohol concentration detection device characterized by being provided with a delay circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9661388U JPH0217652U (en) | 1988-07-21 | 1988-07-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9661388U JPH0217652U (en) | 1988-07-21 | 1988-07-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0217652U true JPH0217652U (en) | 1990-02-05 |
Family
ID=31321629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9661388U Pending JPH0217652U (en) | 1988-07-21 | 1988-07-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0217652U (en) |
-
1988
- 1988-07-21 JP JP9661388U patent/JPH0217652U/ja active Pending
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