ION DETECTOR AND ION GENERATOR
To provide a non-contact type ion detector improved in detection accuracy more than before.SOLUTION: A conversion circuit (12) of an ion detector (1) acquires a first detection signal (V0) corresponding to a change in an electric field (E0) caused by the discharge of an ion generator (100). A freque...
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Format: | Patent |
Sprache: | eng ; jpn |
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Zusammenfassung: | To provide a non-contact type ion detector improved in detection accuracy more than before.SOLUTION: A conversion circuit (12) of an ion detector (1) acquires a first detection signal (V0) corresponding to a change in an electric field (E0) caused by the discharge of an ion generator (100). A frequency filtering circuit (125) applies frequency filtering to the first detection signal (V0) and outputs a first detection signal (V2) after filtering. The frequency filtering circuit (125) includes a BPF circuit (14) and an NF circuit (13) having frequency characteristics different from the frequency characteristics of the BPF circuit (14).SELECTED DRAWING: Figure 1
【課題】非接触型のイオン検出器における検出精度を、従来よりも向上させる。【解決手段】イオン検出器(1)の変換回路(12)は、イオン発生装置(100)の放電によって生じた電界(E0)の変化に対応する第1検出信号(V0)を取得する。周波数フィルタリング回路(125)は、第1検出信号(V0)に周波数フィルタリングを施し、フィルタリング後第1検出信号(V2)を出力する。周波数フィルタリング回路(125)は、BPF回路(14)と、当該BPF回路(14)とは異なる周波数特性を有するNF回路(13)とを含む。【選択図】図1 |
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