JPS5755423A - Temperature controller - Google Patents

Temperature controller

Info

Publication number
JPS5755423A
JPS5755423A JP55130778A JP13077880A JPS5755423A JP S5755423 A JPS5755423 A JP S5755423A JP 55130778 A JP55130778 A JP 55130778A JP 13077880 A JP13077880 A JP 13077880A JP S5755423 A JPS5755423 A JP S5755423A
Authority
JP
Japan
Prior art keywords
output
voltage
temperatre
temperature
thermocouple
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
JP55130778A
Other languages
Japanese (ja)
Inventor
Shinichiro Uekusa
Hideharu Ozaki
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP55130778A priority Critical patent/JPS5755423A/en
Publication of JPS5755423A publication Critical patent/JPS5755423A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/22—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element being a thermocouple
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1913—Control of temperature characterised by the use of electric means using an analogue comparing device delivering a series of pulses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Temperature (AREA)

Abstract

PURPOSE:To perform accurate temperature control with a simple constitution, by using saw-tooth waves with a long time period, in a temperature control with a liquid phase epitaxial method. CONSTITUTION:When a temperature in a furnace 10 is kept constant, a gate circuit 2 is opend. Thus, a binary counter 3 is inoperative, and the output of a DA converter 5 is constant. First, a voltage corresponding to a set temperature is set with a temperatre setter 15. On the other hand, the output of a thermocouple 11 is amplified 12, and the difference with the output of an amplifier 6 is amplified at a differential amplifier 13, and the difference between this output and a set voltage of a temperature setter 15 is applied to a comparator 16. The output of the differential amplifier 13 is positive voltage when the output of the thermocouple 11 is higher than the set voltage, and it is negative positive, when lower. An output is given from the comparator 16 only when the negative voltage output is obtained, a heater 9 is heated to increase the temperatre in the furnace 10 and the temperatre can be kept constant at all times.
JP55130778A 1980-09-22 1980-09-22 Temperature controller Pending JPS5755423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55130778A JPS5755423A (en) 1980-09-22 1980-09-22 Temperature controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55130778A JPS5755423A (en) 1980-09-22 1980-09-22 Temperature controller

Publications (1)

Publication Number Publication Date
JPS5755423A true JPS5755423A (en) 1982-04-02

Family

ID=15042440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55130778A Pending JPS5755423A (en) 1980-09-22 1980-09-22 Temperature controller

Country Status (1)

Country Link
JP (1) JPS5755423A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012118U (en) * 1983-07-04 1985-01-26 松下精工株式会社 Ventilation fan control device
JPH02124156A (en) * 1988-09-30 1990-05-11 Castellini Spa Dental treatment device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49128180A (en) * 1973-04-17 1974-12-07
JPS49129076A (en) * 1973-04-21 1974-12-10

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49128180A (en) * 1973-04-17 1974-12-07
JPS49129076A (en) * 1973-04-21 1974-12-10

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012118U (en) * 1983-07-04 1985-01-26 松下精工株式会社 Ventilation fan control device
JPH02124156A (en) * 1988-09-30 1990-05-11 Castellini Spa Dental treatment device

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