JPS57118104A - Conductor detector - Google Patents

Conductor detector

Info

Publication number
JPS57118104A
JPS57118104A JP419481A JP419481A JPS57118104A JP S57118104 A JPS57118104 A JP S57118104A JP 419481 A JP419481 A JP 419481A JP 419481 A JP419481 A JP 419481A JP S57118104 A JPS57118104 A JP S57118104A
Authority
JP
Japan
Prior art keywords
cases
coils
conductors
shielding cases
contained
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
JP419481A
Other languages
Japanese (ja)
Inventor
Tamotsu Miyoshi
Terutsune Nishio
Takashi Torimaru
Toru Fujii
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.)
Sumitomo Heavy Industries Ltd
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Sumitomo Heavy Industries Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Sumitomo Heavy Industries Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP419481A priority Critical patent/JPS57118104A/en
Publication of JPS57118104A publication Critical patent/JPS57118104A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G12—INSTRUMENT DETAILS
    • G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G12B17/00—Screening
    • G12B17/02—Screening from electric or magnetic fields, e.g. radio waves

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE:To make the manufacture of a conductor detector having high noise removing effect possible by containing plural respectively independent coils in respectively separate shielding cases, and grounding the respective shielding cases. CONSTITUTION:Plural respectively independent coils are contained in respectively separate shielding cases, and these cases are kept grounded by using conductors of the sectional area at which the eddy current generated in one of the cases does not flow out to the oher case. The detection of conduction is accomplished by the degree of electromagnetical coupling between the coils. For example, coils 111 and 112 are contained respectively in shielding cases 114 and 115, and the cases are connected to the ground 313 by means of conductors 311 and 312 having the above-mentioned sections, whereby the induction of noise in the coil 112 is decreased and the measurement signal of good SN ratios is obtained.
JP419481A 1981-01-14 1981-01-14 Conductor detector Pending JPS57118104A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP419481A JPS57118104A (en) 1981-01-14 1981-01-14 Conductor detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP419481A JPS57118104A (en) 1981-01-14 1981-01-14 Conductor detector

Publications (1)

Publication Number Publication Date
JPS57118104A true JPS57118104A (en) 1982-07-22

Family

ID=11577874

Family Applications (1)

Application Number Title Priority Date Filing Date
JP419481A Pending JPS57118104A (en) 1981-01-14 1981-01-14 Conductor detector

Country Status (1)

Country Link
JP (1) JPS57118104A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009111238A (en) * 2007-10-31 2009-05-21 Marubun Corp Semiconductor wafer grinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009111238A (en) * 2007-10-31 2009-05-21 Marubun Corp Semiconductor wafer grinder

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