JPS5710428A - Digital thermometer - Google Patents

Digital thermometer

Info

Publication number
JPS5710428A
JPS5710428A JP8429280A JP8429280A JPS5710428A JP S5710428 A JPS5710428 A JP S5710428A JP 8429280 A JP8429280 A JP 8429280A JP 8429280 A JP8429280 A JP 8429280A JP S5710428 A JPS5710428 A JP S5710428A
Authority
JP
Japan
Prior art keywords
resistor
measured
discharge
common capacitor
results
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
JP8429280A
Other languages
Japanese (ja)
Inventor
Tomio Tsukahara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8429280A priority Critical patent/JPS5710428A/en
Publication of JPS5710428A publication Critical patent/JPS5710428A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit

Landscapes

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

Abstract

PURPOSE:To enable the inexpensive digital thermometer to be manufactured in the case a resistor-to-be-measured having temperature dependence like thermistor and a strandard resistor are discharged through a common capacitor, by directly comparing and operating the discharge characteristics of the two. CONSTITUTION:The resistor-to-be-measured and the standard resistor are connected to the common capacitor, and the characteristics at the discharge are compared and the resistance is measured. For example, a power source 1, the resistor- to-be-measured 2, and the standard resistor 4 are connected to the common capacitor 7 via switching circuits 3, 5 and 6 and a discharge resistor 18. Then, the time required to discharge through each resistor so as to obtain the constant voltage drop is counted by two comparators 8 and 9 and a counter 11, and the results are inputted to registers 12 and 13. Then said results are compared and operated in an operating part 14, and the desired resistance value or the temperature value is obtained and displayed in a display part 15. In this case the manufacturing cost in greatly reduced by the utilization of a microcomputer.
JP8429280A 1980-06-20 1980-06-20 Digital thermometer Pending JPS5710428A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8429280A JPS5710428A (en) 1980-06-20 1980-06-20 Digital thermometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8429280A JPS5710428A (en) 1980-06-20 1980-06-20 Digital thermometer

Publications (1)

Publication Number Publication Date
JPS5710428A true JPS5710428A (en) 1982-01-20

Family

ID=13826387

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8429280A Pending JPS5710428A (en) 1980-06-20 1980-06-20 Digital thermometer

Country Status (1)

Country Link
JP (1) JPS5710428A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132926A (en) * 1982-02-03 1983-08-08 Matsushita Electric Ind Co Ltd Formation of pattern
EP0103183A2 (en) * 1982-08-12 1984-03-21 Omron Tateisi Electronics Co. Measuring circuit device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58132926A (en) * 1982-02-03 1983-08-08 Matsushita Electric Ind Co Ltd Formation of pattern
JPS6258654B2 (en) * 1982-02-03 1987-12-07 Matsushita Electric Ind Co Ltd
EP0103183A2 (en) * 1982-08-12 1984-03-21 Omron Tateisi Electronics Co. Measuring circuit device

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