CA1243373A - Detecteur de grains circulant a grand debit - Google Patents

Detecteur de grains circulant a grand debit

Info

Publication number
CA1243373A
CA1243373A CA000489909A CA489909A CA1243373A CA 1243373 A CA1243373 A CA 1243373A CA 000489909 A CA000489909 A CA 000489909A CA 489909 A CA489909 A CA 489909A CA 1243373 A CA1243373 A CA 1243373A
Authority
CA
Canada
Prior art keywords
circuit
change
level
signal level
response
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
Application number
CA000489909A
Other languages
English (en)
Inventor
David E. Steffen
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.)
Dickey John Corp
Original Assignee
Dickey John 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
Priority claimed from US06/468,858 external-priority patent/US4555624A/en
Application filed by Dickey John Corp filed Critical Dickey John Corp
Application granted granted Critical
Publication of CA1243373A publication Critical patent/CA1243373A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/153—Arrangements in which a pulse is delivered at the instant when a predetermined characteristic of an input signal is present or at a fixed time interval after this instant
    • H03K5/1534—Transition or edge detectors
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01C—PLANTING; SOWING; FERTILISING
    • A01C7/00—Sowing
    • A01C7/08—Broadcast seeders; Seeders depositing seeds in rows
    • A01C7/10—Devices for adjusting the seed-box ; Regulation of machines for depositing quantities at intervals
    • A01C7/102—Regulating or controlling the seed rate
    • A01C7/105—Seed sensors
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06M—COUNTING MECHANISMS; COUNTING OF OBJECTS NOT OTHERWISE PROVIDED FOR
    • G06M1/00—Design features of general application
    • G06M1/08—Design features of general application for actuating the drive
    • G06M1/10—Design features of general application for actuating the drive by electric or magnetic means
    • G06M1/101—Design features of general application for actuating the drive by electric or magnetic means by electro-optical means

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Environmental Sciences (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
CA000489909A 1983-02-22 1985-09-03 Detecteur de grains circulant a grand debit Expired CA1243373A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/468,858 US4555624A (en) 1983-02-22 1983-02-22 High rate seed sensor

Publications (1)

Publication Number Publication Date
CA1243373A true CA1243373A (fr) 1988-10-18

Family

ID=23861535

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000489909A Expired CA1243373A (fr) 1983-02-22 1985-09-03 Detecteur de grains circulant a grand debit

Country Status (2)

Country Link
AU (1) AU579662B2 (fr)
CA (1) CA1243373A (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618819A (en) * 1969-10-07 1971-11-09 Sigma Systems Electronic counting apparatus
US4163507A (en) * 1978-03-20 1979-08-07 International Tapetronics Corporation Optical seed sensor for a seed planter monitor
US4307390A (en) * 1979-11-07 1981-12-22 Dickey-John Corporation Corn and soybean sensor

Also Published As

Publication number Publication date
AU579662B2 (en) 1988-12-01
AU4712485A (en) 1987-03-05

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Legal Events

Date Code Title Description
MKEX Expiry