WO1991002230A1 - Chill-hour meter - Google Patents

Chill-hour meter Download PDF

Info

Publication number
WO1991002230A1
WO1991002230A1 PCT/AU1990/000324 AU9000324W WO9102230A1 WO 1991002230 A1 WO1991002230 A1 WO 1991002230A1 AU 9000324 W AU9000324 W AU 9000324W WO 9102230 A1 WO9102230 A1 WO 9102230A1
Authority
WO
WIPO (PCT)
Prior art keywords
hour meter
chill
meter
temperature
time
Prior art date
Application number
PCT/AU1990/000324
Other languages
French (fr)
Inventor
David Bendyshe Smith
Original Assignee
David Bendyshe Smith
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 David Bendyshe Smith filed Critical David Bendyshe Smith
Publication of WO1991002230A1 publication Critical patent/WO1991002230A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time

Definitions

  • This invention relates to improvements in the measurement of the amount of chilling that deciduous plants receive in their dormancy period.
  • thermometers which have the disadvantages of requiring daily attention to record and reset.
  • Chill-hour meter which indicates the total time that the plants were within a particular temperature range of interest by energising a time meter from a power source through a temperature sensitive device (set at temperature of interest).
  • an hour meter is energised from a battery through a thermostat which is adjusted to the temperature of interest (usually 7°C) whereby the contact will be closed at any temperature below the setting thereby energising the meter to total the time below the set temperature.
  • another form of the invention can be used in areas where the temperature drops below 0°C for the significant periods.
  • a second (lower range) thermostat is used whose contact is close when the temperature is above that of the set temperature.
  • the contacts of the thermostats are connected in series so that the hour meter only records the time that tne temperature was in the range between the set points of the two thermostats.
  • another form of the invention is to provide a 2nd hour meter with its associated thermostat whereby a contact closes when the temperature is above the set temperature (usually 18°C) so that the time above this temperature can be considered when assessing the chill.
  • the components are connected and mounted in a suitable case for exposure to the environment.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Abstract

A chill-hour meter for use in orchards to measure the time that the plants were within a particular temperature range of interest. One or more temperature sensitive devices are used together with one or more time meters and a power source. The time meter such as an hour meter, is energized from a power source such as a battery through a temperature sensitive device such as a thermostat whereby the meter totals the number of hours that the plants were within the particular temperature range set by the temperature sensitive devices.

Description

CHILL-HOUR METER
This invention relates to improvements in the measurement of the amount of chilling that deciduous plants receive in their dormancy period.
Knowledge of the total chill received assists in making decisions as to the suitability of varieties and the application of growth regulating sprays such as cyanamide.
Other instruments used to assess the chill include:
(1) ' I±ijiimum-Maximum thermometers which have the disadvantages of requiring daily attention to record and reset.
(ii) Instantaneous temperature recorders with problems associated with ink and chart changing and interpretation of results.
These problems are overcome by the Chill-hour meter which indicates the total time that the plants were within a particular temperature range of interest by energising a time meter from a power source through a temperature sensitive device (set at temperature of interest).
In one form of the invention an hour meter is energised from a battery through a thermostat which is adjusted to the temperature of interest (usually 7°C) whereby the contact will be closed at any temperature below the setting thereby energising the meter to total the time below the set temperature.
As the effect of chilling ceases at lower temperatures (usually below 0°C) then another form of the invention can be used in areas where the temperature drops below 0°C for the significant periods. In this form of the invention a second (lower range) thermostat is used whose contact is close when the temperature is above that of the set temperature. The contacts of the thermostats are connected in series so that the hour meter only records the time that tne temperature was in the range between the set points of the two thermostats.
As higher temperatures can have the effect to negate chilling another form of the invention is to provide a 2nd hour meter with its associated thermostat whereby a contact closes when the temperature is above the set temperature (usually 18°C) so that the time above this temperature can be considered when assessing the chill.
The components are connected and mounted in a suitable case for exposure to the environment.

Claims

. - our meter device comprising, a power source such as a battery and the like, a temperature sensitive device <=uch as a thermostat and the like and a time counter such as an hour meter and the like, connected so that the time counter records the period of time of the temperature range of interest set by the temperature sensitive device.
2. A chill-hour meter as claim 1 but with additional temperature sensitive devices.
3. A chill-hour meter as claim 2 but with additional time counter devices.
4. A chill-hour meter substantially as herein described with reference to the accompaning specification.
SUBSTITUTE SHEET . .
PCT/AU1990/000324 1989-08-04 1990-08-02 Chill-hour meter WO1991002230A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPJ560789 1989-08-04
AUPJ5607 1989-08-04

Publications (1)

Publication Number Publication Date
WO1991002230A1 true WO1991002230A1 (en) 1991-02-21

Family

ID=3774095

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1990/000324 WO1991002230A1 (en) 1989-08-04 1990-08-02 Chill-hour meter

Country Status (1)

Country Link
WO (1) WO1991002230A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906797A (en) * 1974-05-28 1975-09-23 American Med Electronics Electronic time and temperature measuring system
AU6534780A (en) * 1979-12-14 1981-06-18 Meat Industry Research Institute of New Zealand Incorporated, The Freezing rate of food
CH654413A5 (en) * 1981-12-10 1986-02-14 Hans Georg Braunschweiler Device for measuring body temperature
US4627742A (en) * 1984-03-08 1986-12-09 Omron Tateisi Electronics Co. Computer controlled electronic thermometer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3906797A (en) * 1974-05-28 1975-09-23 American Med Electronics Electronic time and temperature measuring system
AU6534780A (en) * 1979-12-14 1981-06-18 Meat Industry Research Institute of New Zealand Incorporated, The Freezing rate of food
CH654413A5 (en) * 1981-12-10 1986-02-14 Hans Georg Braunschweiler Device for measuring body temperature
US4627742A (en) * 1984-03-08 1986-12-09 Omron Tateisi Electronics Co. Computer controlled electronic thermometer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WIRELESS WORLD, Vol. 90, No. 1578, issued March 1984, (London, U.K.), R. EVERETT, "Differential Temperature Integrator", see page 36. *

Similar Documents

Publication Publication Date Title
Smith et al. Measurement and analysis of evaporation from an inactive outdoor swimming pool
Hahn et al. Measuring physiological responses of animals to environmental stressors using a microcomputer-based portable datalogger
Anderson et al. A systems approach to the adaptation of sunflower to new environments I. Phenology and development
Kjelgaard et al. Measuring sap flow with the heat balance approach using constant and variable heat inputs
JPS57110928A (en) Thermometer
US4286465A (en) Electronic device to record temperatures and the time of occurrence
US4473307A (en) Heat meter system including means for separate, automatic registration of heat consumption
Stoddart et al. The use of a temperature-profiled position transducer for the study of low-temperature growth in Gramineae: Equipment design and output interpretation
Wilson et al. A device for measuring seabird activity at sea
Jones et al. Evaluation of various heat-pulse methods for estimation of sap flow in orchard trees: comparison with micrometeorological estimates of evaporation
Long Instruments for micro‐meteorology
WO1991002230A1 (en) Chill-hour meter
DeGaetano et al. Standardization of weekly growing degree day accumulations based on differences in temperature observation time and method
US3831450A (en) Agricultural alarm system to warn of impending agricultural pest attacks
US5911507A (en) Temperature display device
Fitzpatrick et al. Estimates of potential evaporation using alternative data in Penman's formula
Meyer et al. Errors in field measurement of leaf diffusive conductance associated with leaf temperature
US3472088A (en) Rain rate gauge
Onkapam et al. Three instruments for assessment of WBGT and a comparison with WGT (Botsball)
Faver et al. Short-term estimation of sorghum evapotranspiration from canopy temperature
Hoyt Interannual cloud-cover variations in the contiguous United States
Henshall et al. A small unaspirated screen for air temperature measurement
Blad Remotely sensed crop temperature for water resources management
Gelman Stratospheric monitoring with TOVS data
Hagan et al. Metabolic responses of White Pekin ducks to ambient temperature

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE