JPS5583861A - Magnetism measuring unit - Google Patents

Magnetism measuring unit

Info

Publication number
JPS5583861A
JPS5583861A JP15949278A JP15949278A JPS5583861A JP S5583861 A JPS5583861 A JP S5583861A JP 15949278 A JP15949278 A JP 15949278A JP 15949278 A JP15949278 A JP 15949278A JP S5583861 A JPS5583861 A JP S5583861A
Authority
JP
Japan
Prior art keywords
output
coil
current source
reference current
magnetic field
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
JP15949278A
Other languages
Japanese (ja)
Other versions
JPS6138418B2 (en
Inventor
Kohei Nakagawa
Tetsuo Hayashi
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.)
Oi Electric Co Ltd
Original Assignee
Oi 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 Oi Electric Co Ltd filed Critical Oi Electric Co Ltd
Priority to JP15949278A priority Critical patent/JPS5583861A/en
Publication of JPS5583861A publication Critical patent/JPS5583861A/en
Publication of JPS6138418B2 publication Critical patent/JPS6138418B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measuring Magnetic Variables (AREA)

Abstract

PURPOSE: To make difficult to receive the influence of external noise by making it possible to obtain a measured value by reading the output value of a reference current source when a pulsatile voltage generated from a magnetism detection element is detected.
CONSTITUTION: In magnetism sensing element 10, magnetic field applying coil Lf and detection coil Lp and arranged on magnetic substance M. Coil Lf is connected to reference current source 1, and a known current over a value to saturate magnetic substance M is applied to coil Lf. Coil Lp is connected to threshold circuit 2. Element 10 where a magnetic field to be detected is applied is saturated by reference current source 1, and next, the output of reference current source 1 is changed to apply the opposite-direction magnetic field to element 10, and element 10 is saturated reversely, and the output level of output eLp of coil Lp becomes over a prescribed value, and at this time, detection output V0 is obtained. By extracting successively current values of reference current source 1 by level extraction holding circuit 3 when this output V0 is obtained, a measurement output proportional to the instantaneous value of the measured magnetic field is obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP15949278A 1978-12-21 1978-12-21 Magnetism measuring unit Granted JPS5583861A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15949278A JPS5583861A (en) 1978-12-21 1978-12-21 Magnetism measuring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15949278A JPS5583861A (en) 1978-12-21 1978-12-21 Magnetism measuring unit

Publications (2)

Publication Number Publication Date
JPS5583861A true JPS5583861A (en) 1980-06-24
JPS6138418B2 JPS6138418B2 (en) 1986-08-29

Family

ID=15694939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15949278A Granted JPS5583861A (en) 1978-12-21 1978-12-21 Magnetism measuring unit

Country Status (1)

Country Link
JP (1) JPS5583861A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6121772A (en) * 1996-11-13 2000-09-19 Shih; Kelvin Magnetic sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6121772A (en) * 1996-11-13 2000-09-19 Shih; Kelvin Magnetic sensor

Also Published As

Publication number Publication date
JPS6138418B2 (en) 1986-08-29

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