JPS57119272A - Signal detection circuit - Google Patents

Signal detection circuit

Info

Publication number
JPS57119272A
JPS57119272A JP56004838A JP483881A JPS57119272A JP S57119272 A JPS57119272 A JP S57119272A JP 56004838 A JP56004838 A JP 56004838A JP 483881 A JP483881 A JP 483881A JP S57119272 A JPS57119272 A JP S57119272A
Authority
JP
Japan
Prior art keywords
comparator
value
ultrasonic
pulse
counting
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
JP56004838A
Other languages
Japanese (ja)
Inventor
Chuji Akiyama
Tokuji Saito
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric 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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP56004838A priority Critical patent/JPS57119272A/en
Publication of JPS57119272A publication Critical patent/JPS57119272A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
    • G01S7/523—Details of pulse systems
    • G01S7/526—Receivers
    • G01S7/527—Extracting wanted echo signals
    • G01S7/5273—Extracting wanted echo signals using digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measuring Volume Flow (AREA)
  • Manipulation Of Pulses (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

PURPOSE:To obtain a signal detection circuit of an ultrasonic measuring device which is of a simple constitution and perform a stable operation, by a method wherein a level comparison reference value of an ultrasonic reception pulse is caused to change corresponding to comparison of a counting value of an output of a comparator with a set value. CONSTITUTION:If an ultrasonic wave received by a receiver 2 exceeds a reference value, a pulse is outputted from a comparator 12 to detect the reception timing of the ultrasonic wave. The pulse is counted by a counter 20, and the counting result is compared with a set value of a counting numeral comparing unit 21. Corresponding to the comparing result, the reference value of the comparator 12 changes through a D/A converting part 23, and an ultrasonic wave timing is detectecd through detection of a peak value by means of a diode unsteady against temperature without controlling of a variable grain amplifier. This forms a signal detecting circuit of an ultrasonic measuring device which is reduced in the number of components, is of a simple constitution, and performs asteady operation without being influenced by ambient temperature.
JP56004838A 1981-01-16 1981-01-16 Signal detection circuit Pending JPS57119272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56004838A JPS57119272A (en) 1981-01-16 1981-01-16 Signal detection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56004838A JPS57119272A (en) 1981-01-16 1981-01-16 Signal detection circuit

Publications (1)

Publication Number Publication Date
JPS57119272A true JPS57119272A (en) 1982-07-24

Family

ID=11594827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56004838A Pending JPS57119272A (en) 1981-01-16 1981-01-16 Signal detection circuit

Country Status (1)

Country Link
JP (1) JPS57119272A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004125769A (en) * 2002-02-07 2004-04-22 Matsushita Electric Ind Co Ltd Flow rate measuring apparatus
KR100442640B1 (en) * 2000-12-22 2004-08-02 재단법인 포항산업과학연구원 Ultrasonic received signal detector by using the difference of peak values
JP2009008692A (en) * 2008-10-10 2009-01-15 Panasonic Corp Flow measuring apparatus
JP2009008691A (en) * 2008-10-10 2009-01-15 Panasonic Corp Flow measuring apparatus
JP2021021612A (en) * 2019-07-26 2021-02-18 沖電気工業株式会社 Distance meter, water level indicator, distance measurement method, and distance measurement program

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55155274A (en) * 1979-05-24 1980-12-03 Matsushita Electric Ind Co Ltd Ultrasonic type snow deposition meter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55155274A (en) * 1979-05-24 1980-12-03 Matsushita Electric Ind Co Ltd Ultrasonic type snow deposition meter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442640B1 (en) * 2000-12-22 2004-08-02 재단법인 포항산업과학연구원 Ultrasonic received signal detector by using the difference of peak values
JP2004125769A (en) * 2002-02-07 2004-04-22 Matsushita Electric Ind Co Ltd Flow rate measuring apparatus
JP4534421B2 (en) * 2002-02-07 2010-09-01 パナソニック株式会社 Flow measuring device
JP2009008692A (en) * 2008-10-10 2009-01-15 Panasonic Corp Flow measuring apparatus
JP2009008691A (en) * 2008-10-10 2009-01-15 Panasonic Corp Flow measuring apparatus
JP2021021612A (en) * 2019-07-26 2021-02-18 沖電気工業株式会社 Distance meter, water level indicator, distance measurement method, and distance measurement program

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