GB1438281A - Mastitis detector - Google Patents

Mastitis detector

Info

Publication number
GB1438281A
GB1438281A GB2279172A GB2279172A GB1438281A GB 1438281 A GB1438281 A GB 1438281A GB 2279172 A GB2279172 A GB 2279172A GB 2279172 A GB2279172 A GB 2279172A GB 1438281 A GB1438281 A GB 1438281A
Authority
GB
United Kingdom
Prior art keywords
cell
capacitor
conductivity
voltage
delay 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.)
Expired
Application number
GB2279172A
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.)
Chalton Electronic Services Ltd
Original Assignee
Chalton Electronic Services 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 Chalton Electronic Services Ltd filed Critical Chalton Electronic Services Ltd
Priority to GB2279172A priority Critical patent/GB1438281A/en
Publication of GB1438281A publication Critical patent/GB1438281A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/013—On-site detection of mastitis in milk
    • A01J5/0133—On-site detection of mastitis in milk by using electricity, e.g. conductivity or capacitance
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J5/00—Milking machines or devices
    • A01J5/013—On-site detection of mastitis in milk
    • A01J5/0135—On-site detection of mastitis in milk by using light, e.g. light absorption or light transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/02—Food
    • G01N33/04—Dairy products

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Food Science & Technology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1438281 Milk conductivity measuring apparatus CHALTON ELECTRONIC SERVICES Ltd 16 Aug 1973 [16 May 1972] 22791/72. Heading G1N In a milk conductivity indicator for detecting mastitis a trigger circuit responsive to the attenuation of a current passed through a conductivity cell is inhibited by a delay circuit for a predetermined initial period commencing with the commencement of milking. Pulses from a multivibrator including amplifier Al are applied to one electrode of a conductivity cell 25, Fig. 2 (not shown) the second electrode of which is connected via rectifier D1 and a smoothing circuit to charge capacitor C4. The voltage across capacitor C4 is applied to the inverting input of Schmitt trigger A2 which is triggered when the voltage across capacitor C4 exceeds a level set by potentiometer R10 i.e. if the conductivity of the milk. in cell 25 exceeds a predetermined level indicating the onset of mastitis. In accordance with the invention a delay circuit is provided including a timer 28 to prevent operation of the trigger circuit. Pulses passed through cell 25 are applied via transistor TR2 to set delay circuit 28 so that charge is prevented from building up on capacitor C4. After capacitor 11 has charged via resistor 22 to a level to release the delay circuit 28 the attenuated pulses from cell 25 charge capacitor C4. If the voltage exceeds the reference voltage the Schmitt trigger is fired and due to feedback capacitor C5 operates as a monostable multi-vibrator the frequency of whose output is an indication of how much the capacitor voltage exceeds the reference The output pulses light a light emitting diode LD of the respective apparatus which are also fed to transistor TR1 whereby bell 26 is activated. Cell construction Fig. 2. The cell 2 is generally spherical of polycarbonate material and is provided with diametrically opposed inlet and outlet ports 4, 8 connected to the milking machine cluster and measuring jar, respectively. One of the ports has a tubular extension 16 into the interior of the cell to form an annular well 12 into which graphite electrodes 10 extend through the cell wall. Drain duct 6 is provided.
GB2279172A 1972-05-16 1972-05-16 Mastitis detector Expired GB1438281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2279172A GB1438281A (en) 1972-05-16 1972-05-16 Mastitis detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2279172A GB1438281A (en) 1972-05-16 1972-05-16 Mastitis detector

Publications (1)

Publication Number Publication Date
GB1438281A true GB1438281A (en) 1976-06-03

Family

ID=10185140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2279172A Expired GB1438281A (en) 1972-05-16 1972-05-16 Mastitis detector

Country Status (1)

Country Link
GB (1) GB1438281A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416417A (en) * 1991-05-08 1995-05-16 S.A.E. Afikim Method and system for investigating mastitis of a cow by measuring electrical conductivity of milk

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5416417A (en) * 1991-05-08 1995-05-16 S.A.E. Afikim Method and system for investigating mastitis of a cow by measuring electrical conductivity of milk

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee