JPS5614172A - Body detecting element - Google Patents

Body detecting element

Info

Publication number
JPS5614172A
JPS5614172A JP9076079A JP9076079A JPS5614172A JP S5614172 A JPS5614172 A JP S5614172A JP 9076079 A JP9076079 A JP 9076079A JP 9076079 A JP9076079 A JP 9076079A JP S5614172 A JPS5614172 A JP S5614172A
Authority
JP
Japan
Prior art keywords
radiator
contact
curve
temperature
simple structure
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.)
Granted
Application number
JP9076079A
Other languages
Japanese (ja)
Other versions
JPS6326855B2 (en
Inventor
Takeshi Aoki
Shigeru Yoneda
Takashi Ando
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.)
Tokyo Sanyo Electric Co Ltd
Sanyo Electric Co Ltd
Original Assignee
Tokyo Sanyo Electric Co Ltd
Sanyo Electric 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 Tokyo Sanyo Electric Co Ltd, Sanyo Electric Co Ltd filed Critical Tokyo Sanyo Electric Co Ltd
Priority to JP9076079A priority Critical patent/JPS5614172A/en
Publication of JPS5614172A publication Critical patent/JPS5614172A/en
Publication of JPS6326855B2 publication Critical patent/JPS6326855B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Geophysics And Detection Of Objects (AREA)

Abstract

PURPOSE: To improve body detection precision with simple structure by making use of a decrease in the thermal time constant of a detecting element, obtained by thermally combining a semiconductor element in a radiator, when a body comes into contact with it.
CONSTITUTION: In period T0 right after the flowing of electric current to semiconductor element 2 is started, the temperature of the junction rises regardless of whether body 5 contacts radiator 1 or not, but if body 5 is not brought into contact with radiator 1 after the period, the temperature rises as shown by curve (a). On the other hand, when body 5 is in contact with radiator 1, the overall time constant decreases greatly through thermal Zener diode 7, so that the temperature curve changes to curve (b). For the purpose, temperatures of the junction at T0 and T1 are measured and it is judged that when their difference is above a certain level, body 5 resides and when not, body 5 does not reside. Thus, the existence of the body can be detected accurately with simple structure.
COPYRIGHT: (C)1981,JPO&Japio
JP9076079A 1979-07-16 1979-07-16 Body detecting element Granted JPS5614172A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9076079A JPS5614172A (en) 1979-07-16 1979-07-16 Body detecting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9076079A JPS5614172A (en) 1979-07-16 1979-07-16 Body detecting element

Publications (2)

Publication Number Publication Date
JPS5614172A true JPS5614172A (en) 1981-02-10
JPS6326855B2 JPS6326855B2 (en) 1988-05-31

Family

ID=14007555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9076079A Granted JPS5614172A (en) 1979-07-16 1979-07-16 Body detecting element

Country Status (1)

Country Link
JP (1) JPS5614172A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50941A (en) * 1973-05-08 1975-01-08
JPS5093694A (en) * 1973-12-21 1975-07-25
JPS5612568A (en) * 1979-07-11 1981-02-06 Sanyo Electric Co Ltd Body detecting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50941A (en) * 1973-05-08 1975-01-08
JPS5093694A (en) * 1973-12-21 1975-07-25
JPS5612568A (en) * 1979-07-11 1981-02-06 Sanyo Electric Co Ltd Body detecting device

Also Published As

Publication number Publication date
JPS6326855B2 (en) 1988-05-31

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