JPH01128159U - - Google Patents
Info
- Publication number
- JPH01128159U JPH01128159U JP2319888U JP2319888U JPH01128159U JP H01128159 U JPH01128159 U JP H01128159U JP 2319888 U JP2319888 U JP 2319888U JP 2319888 U JP2319888 U JP 2319888U JP H01128159 U JPH01128159 U JP H01128159U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- fuel sensor
- signal processing
- charging
- change
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
第１図はこの考案の一実施例を示す回路図、第
２図はそのＡ点の電位の変化を示す特性図、第３
図はその出力パルス信号の波形図、第４図はこの
考案の異なる実施例を示す回路図、第５図ａ，ｂ
，ｃはその各部の波形を示す波形図、第６図は従
来における信号処理回路の回路図である。
１……燃料センサ、２，４……モノマルチ回路
、３……トリガ・積分回路、Ｒ３，Ｒ５……サー
ミスタ。
Fig. 1 is a circuit diagram showing an embodiment of this invention, Fig. 2 is a characteristic diagram showing changes in the potential at point A, and Fig. 3 is a circuit diagram showing an embodiment of this invention.
The figure is a waveform diagram of the output pulse signal, Figure 4 is a circuit diagram showing a different embodiment of this invention, and Figures 5 a and b.
, c are waveform diagrams showing the waveforms of each part, and FIG. 6 is a circuit diagram of a conventional signal processing circuit. 1...Fuel sensor, 2, 4...Mono multi circuit, 3...Trigger/integrator circuit, R3 , R5 ...Thermistor.
Claims (1)
を構成し、その充電時間変化から燃料中に配置さ
れた上記電極間の静電容量を測定する燃料センサ
の信号処理回路において、温度補償用抵抗を設け
、上記電極もしくはこれと比較される固定コンデ
ンサの充電電流を温度に応じて変化させるように
構成したことを特徴とする燃料センサの信号処理
回路。 A temperature compensation resistor is used in the signal processing circuit of the fuel sensor, which constitutes a charging/discharging circuit by the electrodes of the fuel sensor and the resistor, and measures the capacitance between the electrodes arranged in the fuel based on the change in charging time. 1. A signal processing circuit for a fuel sensor, characterized in that the circuit is configured to change the charging current of the electrode or a fixed capacitor compared with the electrode according to temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2319888U JPH01128159U (en) | 1988-02-24 | 1988-02-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2319888U JPH01128159U (en) | 1988-02-24 | 1988-02-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01128159U true JPH01128159U (en) | 1989-09-01 |
Family
ID=31241980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2319888U Pending JPH01128159U (en) | 1988-02-24 | 1988-02-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01128159U (en) |
-
1988
- 1988-02-24 JP JP2319888U patent/JPH01128159U/ja active Pending