JPH0411831B2 - - Google Patents

Info

Publication number
JPH0411831B2
JPH0411831B2 JP56196215A JP19621581A JPH0411831B2 JP H0411831 B2 JPH0411831 B2 JP H0411831B2 JP 56196215 A JP56196215 A JP 56196215A JP 19621581 A JP19621581 A JP 19621581A JP H0411831 B2 JPH0411831 B2 JP H0411831B2
Authority
JP
Japan
Prior art keywords
circuit
receiver
transmitter
paper
ultrasonic
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.)
Expired - Lifetime
Application number
JP56196215A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5897679A (ja
Inventor
Satonori Shigihara
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.)
TDK Corp
Original Assignee
TDK Corp
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 TDK Corp filed Critical TDK Corp
Priority to JP56196215A priority Critical patent/JPS5897679A/ja
Publication of JPS5897679A publication Critical patent/JPS5897679A/ja
Publication of JPH0411831B2 publication Critical patent/JPH0411831B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/001—Acoustic presence detection

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
JP56196215A 1981-12-08 1981-12-08 紙検知装置 Granted JPS5897679A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56196215A JPS5897679A (ja) 1981-12-08 1981-12-08 紙検知装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56196215A JPS5897679A (ja) 1981-12-08 1981-12-08 紙検知装置

Publications (2)

Publication Number Publication Date
JPS5897679A JPS5897679A (ja) 1983-06-10
JPH0411831B2 true JPH0411831B2 (enrdf_load_stackoverflow) 1992-03-02

Family

ID=16354114

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56196215A Granted JPS5897679A (ja) 1981-12-08 1981-12-08 紙検知装置

Country Status (1)

Country Link
JP (1) JPS5897679A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
JPS5897679A (ja) 1983-06-10

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