JPH03106407U - - Google Patents

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Publication number
JPH03106407U
JPH03106407U JP1327690U JP1327690U JPH03106407U JP H03106407 U JPH03106407 U JP H03106407U JP 1327690 U JP1327690 U JP 1327690U JP 1327690 U JP1327690 U JP 1327690U JP H03106407 U JPH03106407 U JP H03106407U
Authority
JP
Japan
Prior art keywords
circuit
electrode
oscillation
tuning
oscillation circuit
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
Application number
JP1327690U
Other languages
English (en)
Other versions
JPH0744965Y2 (ja
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1990013276U priority Critical patent/JPH0744965Y2/ja
Priority to US07/654,425 priority patent/US5198777A/en
Priority to EP91301173A priority patent/EP0442727B1/en
Priority to DE69122895T priority patent/DE69122895T2/de
Publication of JPH03106407U publication Critical patent/JPH03106407U/ja
Application granted granted Critical
Publication of JPH0744965Y2 publication Critical patent/JPH0744965Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Description

【図面の簡単な説明】
第１図は本考案に係る紙厚検出装置の一実施例
を示すブロツク図、第２図は同実施例装置の具体
的な一回路図、第３図は同実施例における紙厚検
出作用の説明図、第４図は従来の一般的な紙厚検
出装置の説明図である。 １……紙、２……通過経路、３……ポテンシヨ
メータ、３ａ……回転軸、３ｂ……接触針、４…
…検波回路、５……増幅回路、６……発振回路、
６ａ……高インピーダンス変換回路、６ｂ……発
振回路部、７……同調回路、８……電極検出部、
９……ＡＧＣ回路、１０……セラミツク共振器、
１１……インピーダンスマツチング回路、１２…
…セラミツク共振器、１３……トランジスタ、１
４……検出電極、１５……接地電極、２１……イ
ンダクタンス素子、２２……ダイオード、２３…
…コンデンサ、２４……抵抗器、２５……結合コ
ンデンサ、２７……トランジスタ。

Claims (1)

    【実用新案登録請求の範囲】
  1. 紙の通過経路の上下位置に紙の通過間隙を介し
    て対向配置される接地電極と検出電極とからなる
    電極検出部と、発振周波数信号を発振出力する発
    振回路と、前記発振回路とは別個独立の共振器を
    有し前記電極検出部で検出される紙厚の変化に対
    応する静電容量の変化で前記発振周波数信号との
    同調点が変化する同調回路とを有する紙厚検出装
    置。
JP1990013276U 1990-02-14 1990-02-14 紙厚検出装置 Expired - Lifetime JPH0744965Y2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1990013276U JPH0744965Y2 (ja) 1990-02-14 1990-02-14 紙厚検出装置
US07/654,425 US5198777A (en) 1990-02-14 1991-02-12 Paper thickness detecting apparatus having a resonator with a resonance point set by a capacitance detecting unit
EP91301173A EP0442727B1 (en) 1990-02-14 1991-02-13 Paper thickness detecting apparatus
DE69122895T DE69122895T2 (de) 1990-02-14 1991-02-13 Apparat zur Feststellung der Papierdicke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990013276U JPH0744965Y2 (ja) 1990-02-14 1990-02-14 紙厚検出装置

Publications (2)

Publication Number Publication Date
JPH03106407U true JPH03106407U (ja) 1991-11-01
JPH0744965Y2 JPH0744965Y2 (ja) 1995-10-11

Family

ID=31516703

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990013276U Expired - Lifetime JPH0744965Y2 (ja) 1990-02-14 1990-02-14 紙厚検出装置

Country Status (1)

Country Link
JP (1) JPH0744965Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116603A (ja) * 1984-11-12 1986-06-04 Fujitsu Ltd 検出装置
JPS61209361A (ja) * 1985-03-13 1986-09-17 Nec Corp 静電容量の測定方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61116603A (ja) * 1984-11-12 1986-06-04 Fujitsu Ltd 検出装置
JPS61209361A (ja) * 1985-03-13 1986-09-17 Nec Corp 静電容量の測定方法

Also Published As

Publication number Publication date
JPH0744965Y2 (ja) 1995-10-11

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term