DISTANCE SENSOR
PROBLEM TO BE SOLVED: To provide a distance sensor which is at a long distance from a measurement object and is capable of accurately detecting little variation in capacitance.SOLUTION: In the distance sensor which detects a distance to a measurement object by variation in capacitance between the me...
Gespeichert in:
| Hauptverfasser: | , |
|---|---|
| Format: | Patent |
| Sprache: | eng ; jpn |
| Schlagworte: | |
| Online-Zugang: | Volltext bestellen |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a distance sensor which is at a long distance from a measurement object and is capable of accurately detecting little variation in capacitance.SOLUTION: In the distance sensor which detects a distance to a measurement object by variation in capacitance between the measurement object and a detection electrode, an operational amplifier 14 is provided, and the detection electrode and one end of a first resistance R2 are connected to a positive end of the operational amplifier 14, and a negative end of the operational amplifier, an output of the operational amplifier 14, and one end of a first capacitor C1 are connected, and one end of a second resistance R1, the other end of the first capacitor C1, and the other end of the first resistance R2 are connected, and an AC signal source is connected to the other end of the second resistance R1.
【課題】被測定物までの距離が長く、静電容量の小さな変化を精度良く検出できる距離センサーを提供する。【解決手段】被測定物と検出電極との静電容量変化により、被測定物までの距離を検出する距離センサーであって、演算増幅器１４が設けられ、前記演算増幅器１４の＋端に検出電極と第一の抵抗Ｒ２の一端が接続され、前記演算増幅器１４の−端と前記演算増幅器１４の出力と第一のコンデンサーＣ１の一端が接続され、第二の抵抗Ｒ１の一端と前記第一のコンデンサーＣ１の他端と前記第一の抵抗Ｒ２の他端が接続され、前記第二の抵抗Ｒ１の他端に交流信号源が接続されることを特徴とする。【選択図】図３ |
|---|