JPH0475957U - - Google Patents
Info
- Publication number
- JPH0475957U JPH0475957U JP11884090U JP11884090U JPH0475957U JP H0475957 U JPH0475957 U JP H0475957U JP 11884090 U JP11884090 U JP 11884090U JP 11884090 U JP11884090 U JP 11884090U JP H0475957 U JPH0475957 U JP H0475957U
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- circuit
- alcohol concentration
- signal
- output
- 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 description 5
- 230000010355 oscillation Effects 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 3
- 238000001514 detection method Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
第１図は本願考案の構成を示すブロツク回路図
、第２図、第３図は第１図の詳細回路図、第４図
は第１図の信号波形図、第５図は従来のブロツク
回路図、第６図、第７図は第５図の特性図である
。
１……センサ部、２……ＬＣ発振回路、３……
波形変換回路、４……分周器、５……周波数−電
圧変換回路（Ｆ−Ｖ変換回路）、６……マイコン
、１１……２乗回路、１２……増幅器。
Figure 1 is a block circuit diagram showing the configuration of the present invention, Figures 2 and 3 are detailed circuit diagrams of Figure 1, Figure 4 is a signal waveform diagram of Figure 1, and Figure 5 is a conventional block circuit. 6 and 7 are characteristic diagrams of FIG. 5. 1...Sensor section, 2...LC oscillation circuit, 3...
Waveform conversion circuit, 4... Frequency divider, 5... Frequency-voltage conversion circuit (F-V conversion circuit), 6... Microcomputer, 11... Square circuit, 12... Amplifier.
Claims (1)
が変化するセンサ部と、 該センサ部の電極間の静電容量に対応した周波
数の信号を出力する発振回路と、 該発振回路の出力信号を分周する分周器と、 該分周器の出力信号の周期に比例した電圧値の
信号を出力する周波数−電圧変換回路と、 を備えたアルコール濃度検出装置において、 前記周波数−電圧変換回路の出力電圧値を２乗
する２乗回路と、 該２乗回路の出力値を調整する調整回路と、 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 part whose inter-electrode capacitance changes based on the alcohol concentration; an oscillation circuit which outputs a signal with a frequency corresponding to the inter-electrode capacitance of the sensor part; An alcohol concentration detection device comprising: a frequency divider that divides the frequency of the output signal of the oscillation circuit; and a frequency-voltage conversion circuit that outputs a signal with a voltage value proportional to the cycle of the output signal of the frequency divider. An alcohol concentration detection device comprising: a squaring circuit that squares the output voltage value of the frequency-voltage conversion circuit; and an adjustment circuit that adjusts the output value of the squaring circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11884090U JP2509048Y2 (en) | 1990-11-15 | 1990-11-15 | Alcohol concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11884090U JP2509048Y2 (en) | 1990-11-15 | 1990-11-15 | Alcohol concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0475957U true JPH0475957U (en) | 1992-07-02 |
| JP2509048Y2 JP2509048Y2 (en) | 1996-08-28 |
Family
ID=31866806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11884090U Expired - Fee Related JP2509048Y2 (en) | 1990-11-15 | 1990-11-15 | Alcohol concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2509048Y2 (en) |
-
1990
- 1990-11-15 JP JP11884090U patent/JP2509048Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2509048Y2 (en) | 1996-08-28 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |