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A platform for research: civil engineering, architecture and urbanism
CAPACITANCE DETECTION DEVICE
To provide a capacitance detection device capable of suppressing reduction of responsibility of detection due to decrease of a peak current during a reference capacitor being discharging.SOLUTION: A first switch 15 for making a reference capacitor discharge is configured by four switching elements 23 to 26 that are connected in parallel. A discharge control circuit 18 turns on the four switching elements 23 to 26 with a time difference so that the number of ON elements that is the number of switching element turned ON at discharge of the reference capacitor increases from 0 to 4 by 1, and controls each of the switching elements 23 to 26 so that a time interval between one increment to the next increment of the number of ON elements becomes shorter as the number of ON elements becomes larger.SELECTED DRAWING: Figure 2
【課題】基準コンデンサの放電中のピーク電流の低減に伴う検出の応答性の低下を抑えられる静電容量検出装置を提供する。【解決手段】基準コンデンサを放電させる第１スイッチ１５を並列接続した４個のスイッチング素子２３〜２６により構成する。放電制御回路１８は、基準コンデンサの放電に際して、オンとなっているスイッチング素子の数であるオン素子数が０から４へと１ずつ増加するように時間差をつけて４個のスイッチング素子２３〜２６をオンとし、且つオン素子数の増加から次の増加までの時間が、同オン素子数が多くなるほど短い時間となるように、各スイッチング素子２３〜２６を駆動する。【選択図】図２
CAPACITANCE DETECTION DEVICE
To provide a capacitance detection device capable of suppressing reduction of responsibility of detection due to decrease of a peak current during a reference capacitor being discharging.SOLUTION: A first switch 15 for making a reference capacitor discharge is configured by four switching elements 23 to 26 that are connected in parallel. A discharge control circuit 18 turns on the four switching elements 23 to 26 with a time difference so that the number of ON elements that is the number of switching element turned ON at discharge of the reference capacitor increases from 0 to 4 by 1, and controls each of the switching elements 23 to 26 so that a time interval between one increment to the next increment of the number of ON elements becomes shorter as the number of ON elements becomes larger.SELECTED DRAWING: Figure 2
【課題】基準コンデンサの放電中のピーク電流の低減に伴う検出の応答性の低下を抑えられる静電容量検出装置を提供する。【解決手段】基準コンデンサを放電させる第１スイッチ１５を並列接続した４個のスイッチング素子２３〜２６により構成する。放電制御回路１８は、基準コンデンサの放電に際して、オンとなっているスイッチング素子の数であるオン素子数が０から４へと１ずつ増加するように時間差をつけて４個のスイッチング素子２３〜２６をオンとし、且つオン素子数の増加から次の増加までの時間が、同オン素子数が多くなるほど短い時間となるように、各スイッチング素子２３〜２６を駆動する。【選択図】図２
CAPACITANCE DETECTION DEVICE
静電容量検出装置
KISANUKI YUTAKA (author) / TAKAHASHI AKIRA (author)
2019-06-27
Patent
Electronic Resource
Japanese
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