JPS5566774A - Method of detecting mixed metals - Google Patents
Method of detecting mixed metalsInfo
- Publication number
- JPS5566774A JPS5566774A JP13951378A JP13951378A JPS5566774A JP S5566774 A JPS5566774 A JP S5566774A JP 13951378 A JP13951378 A JP 13951378A JP 13951378 A JP13951378 A JP 13951378A JP S5566774 A JPS5566774 A JP S5566774A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- difference signals
- coils
- coil
- detector
- 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
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
PURPOSE: To make circuit constitution simple and equilibrium adjustment setting easy, by testing the existence of mixed metals by detecting magnetic flux detection difference signals from a center-earthed secondary coil with a detector controlled by the 0° and 90° phases of an oscillator.
CONSTITUTION: A detector head 10 consists of the oscillator coil L1 of a transmitter 11 and center-earthed secondary coils L2 and L3 of a receiver 12, and when a metal mixed tested object passes between the transmitter 11 and the receiver 12, magnetic flux detection difference signals are generated in the coils L1 and L2. These difference signals, via a phase transfer circuit 50, are detected by detectors 31 and 32 which open when the phase of an osicllator 13 is 0° or 90°, and if a detector output ratio given by a divider 70 passes a prescribed value, a metal mixture detection signal is outputted by a window comparator 71. Therefore, the configuration is simplified, and at the same time, the accurate phase setting of the coils L2 and L3 become unnecessary. In addition, if the detector output is subtraction, multiplication and root mean square processed, the same result can be obtained, and if the magnetic flux of the coil L1 is inclined and judgement setting values are selected, the effect of minute magnetic flux changes generated by other substances than metals can be prevented.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53139513A JPS5836755B2 (en) | 1978-11-13 | 1978-11-13 | How to detect contaminated metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53139513A JPS5836755B2 (en) | 1978-11-13 | 1978-11-13 | How to detect contaminated metals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5566774A true JPS5566774A (en) | 1980-05-20 |
| JPS5836755B2 JPS5836755B2 (en) | 1983-08-11 |
Family
ID=15247042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53139513A Expired JPS5836755B2 (en) | 1978-11-13 | 1978-11-13 | How to detect contaminated metals |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836755B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6025473A (en) * | 1983-07-22 | 1985-02-08 | Anritsu Corp | Detector of metal |
| JPS6035285A (en) * | 1983-04-27 | 1985-02-23 | ポール コーポレーシヨン | Electromagnetic detector for metallic substance |
| US4563644A (en) * | 1982-04-01 | 1986-01-07 | Asea Aktiebolag | Device for detecting metallic objects in a flow of non-metallic material |
| JP2016519299A (en) * | 2013-04-04 | 2016-06-30 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Object search device and metal object and / or magnetizable object localization method |
-
1978
- 1978-11-13 JP JP53139513A patent/JPS5836755B2/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563644A (en) * | 1982-04-01 | 1986-01-07 | Asea Aktiebolag | Device for detecting metallic objects in a flow of non-metallic material |
| JPS6035285A (en) * | 1983-04-27 | 1985-02-23 | ポール コーポレーシヨン | Electromagnetic detector for metallic substance |
| JPH0352836B2 (en) * | 1983-04-27 | 1991-08-13 | Pall Corp | |
| JPS6025473A (en) * | 1983-07-22 | 1985-02-08 | Anritsu Corp | Detector of metal |
| JP2016519299A (en) * | 2013-04-04 | 2016-06-30 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツングＲｏｂｅｒｔ Ｂｏｓｃｈ Ｇｍｂｈ | Object search device and metal object and / or magnetizable object localization method |
| US10054709B2 (en) | 2013-04-04 | 2018-08-21 | Robert Bosch Gmbh | Object locater and method for locating a metallic and/or magnetizable object |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5836755B2 (en) | 1983-08-11 |
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