JPS57198809A - System for improving signal to noise ratio - Google Patents

System for improving signal to noise ratio

Info

Publication number
JPS57198809A
JPS57198809A JP56083804A JP8380481A JPS57198809A JP S57198809 A JPS57198809 A JP S57198809A JP 56083804 A JP56083804 A JP 56083804A JP 8380481 A JP8380481 A JP 8380481A JP S57198809 A JPS57198809 A JP S57198809A
Authority
JP
Japan
Prior art keywords
signal
sensor
noise ratio
reaches
medium
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
Application number
JP56083804A
Other languages
Japanese (ja)
Inventor
Hiroshi Kunieda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co Ltd
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 by Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP56083804A priority Critical patent/JPS57198809A/en
Publication of JPS57198809A publication Critical patent/JPS57198809A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To improve the signal to noise ratio by reading a noise level immediatly before a signal medium reaches a signal sensor to determine a difference from the subsequent detection output signal.
CONSTITUTION: A signal medium 1 comprising material such as sheet paper is moved through a conveying path in the direction of the arrow and a position sensor 7 and a signal sensor 2 are arranged on the path. According to detection signals from the position sensor 7, a integrating reset timing signal 8 is generated cyclically from a timing generation circuit 15 while outputs of the signal sensor 2 and fed to an integrator 5 to draw an integration signal 10 each time the signal 8 is applied. A noise level is extracted from the outputs 10 immediately before the signal medium 1 reaches the signal sensor 2 to detect a difference from the detection signal when the signal medium 1 reaches the signal sensor 2. Thus, accurate detection can be done with a higher signal to noise ratio.
COPYRIGHT: (C)1982,JPO&Japio
JP56083804A 1981-06-02 1981-06-02 System for improving signal to noise ratio Pending JPS57198809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56083804A JPS57198809A (en) 1981-06-02 1981-06-02 System for improving signal to noise ratio

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56083804A JPS57198809A (en) 1981-06-02 1981-06-02 System for improving signal to noise ratio

Publications (1)

Publication Number Publication Date
JPS57198809A true JPS57198809A (en) 1982-12-06

Family

ID=13812842

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56083804A Pending JPS57198809A (en) 1981-06-02 1981-06-02 System for improving signal to noise ratio

Country Status (1)

Country Link
JP (1) JPS57198809A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1541971A2 (en) * 2003-12-09 2005-06-15 Fanuc Ltd Encoder with noise detection
JP2005518547A (en) * 2002-02-21 2005-06-23 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング Method and apparatus for determining the position of a confined object

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005518547A (en) * 2002-02-21 2005-06-23 ローベルト　ボツシユ　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング Method and apparatus for determining the position of a confined object
EP1541971A2 (en) * 2003-12-09 2005-06-15 Fanuc Ltd Encoder with noise detection
EP1541971A3 (en) * 2003-12-09 2006-04-26 Fanuc Ltd Encoder with noise detection
CN1323285C (en) * 2003-12-09 2007-06-27 发那科株式会社 Encoder
US7247839B2 (en) 2003-12-09 2007-07-24 Fanuc Ltd Encoder for detecting position or displacement of moving body

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