JPH0227587U - - Google Patents
Info
- Publication number
- JPH0227587U JPH0227587U JP6966989U JP6966989U JPH0227587U JP H0227587 U JPH0227587 U JP H0227587U JP 6966989 U JP6966989 U JP 6966989U JP 6966989 U JP6966989 U JP 6966989U JP H0227587 U JPH0227587 U JP H0227587U
- Authority
- JP
- Japan
- Prior art keywords
- transmitting coil
- magnetic field
- outputs
- ferrous
- unbalanced signal
- 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
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- -1 ferrous metals Chemical class 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Description
第１図は金属検出装置の検出原理を示す図、第
２図は鉄による磁力線への影響を示す図、第３図
は非鉄金属による磁力線への影響を示す図、第４
図は従来の金属検出装置の概略構成を示すブロツ
ク図、第５図はこの考案の金属検出装置の一実施
例を示すブロツク図である。
１１ａ，１１ｂ……発振器、１２ａ，１２ｂ…
…電圧増幅器、１３……駆動トランス、１４……
検出ヘツド、１５……バランス回路、１６……交
流増幅器、１７……分波器、１８ａ，１８ｂ……
位相検波器、１９ａ，１９ｂ……移相器、２０ａ
，２０ｂ……フイルタ、２１ａ，２１ｂ……増幅
器、２２ａ，２２ｂ……比較器、２３……オア回
路、Ｐ……送信コイル、Ｓ１，Ｓ２……受信コイ
ル、Ｅ１，Ｅ２……誘起電圧、Ｗ……被検査体。
Figure 1 is a diagram showing the detection principle of the metal detection device, Figure 2 is a diagram showing the influence of iron on magnetic lines of force, Figure 3 is a diagram showing the influence of non-ferrous metals on magnetic lines of force, and Figure 4 is a diagram showing the influence of non-ferrous metals on magnetic lines of force.
The figure is a block diagram showing a schematic configuration of a conventional metal detection device, and FIG. 5 is a block diagram showing an embodiment of the metal detection device of the present invention. 11a, 11b... oscillator, 12a, 12b...
...Voltage amplifier, 13... Drive transformer, 14...
Detection head, 15... Balance circuit, 16... AC amplifier, 17... Duplexer, 18a, 18b...
Phase detector, 19a, 19b...phase shifter, 20a
, 20b...Filter, 21a, 21b...Amplifier, 22a, 22b...Comparator, 23...OR circuit, P...Transmission coil, S1, S2...Reception coil, E1, E2...Induced voltage, W ...Object to be inspected.
Claims (1)
動して交番磁界を発生させる駆動回路と、該１つ
の送信コイルが発生させる磁界を受けるように配
置された第１および第２の受信コイルと、前記磁
界中を通過する被検査体に混入した金属によつて
生じる前記第１、第２の受信コイルの誘起電圧の
変動に基づいて不平衝信号を出力するバランス回
路と、該不平衝信号に基づいて金属検出信号を出
力する検出回路とを備えた金属検出装置において
、 前記１つの送信コイルを鉄、非鉄金属に最適の
異なる二つの周波数の駆動信号によつて駆動する
と共に、前記不平衝信号を前記駆動信号と同じ二
つの周波数成分に分波し、該分波された二つの周
波数成分をそれぞれ第１の位相検波器、第２の位
相検波器によつて互いに９０°異なる位相で検波
して、それぞれ鉄および非鉄についての検出信号
を出力するようにしたことを特徴とする金属検出
装置。[Claims for Utility Model Registration] One transmitting coil, a drive circuit that drives the one transmitting coil to generate an alternating magnetic field, and a first transmitting coil arranged to receive the magnetic field generated by the one transmitting coil. and a second receiving coil, and a balance circuit that outputs an unbalanced signal based on fluctuations in induced voltage in the first and second receiving coils caused by metal mixed in the object to be inspected passing through the magnetic field. and a detection circuit that outputs a metal detection signal based on the unbalanced signal, wherein the one transmitting coil is driven by drive signals of two different frequencies that are optimal for ferrous and non-ferrous metals. At the same time, the unbalanced signal is demultiplexed into the same two frequency components as the drive signal, and the demultiplexed two frequency components are mutually separated by a first phase detector and a second phase detector, respectively. A metal detection device characterized in that it detects waves with phases different by 90° and outputs detection signals for ferrous and non-ferrous metals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989069669U JPH0411187Y2 (en) | 1989-06-14 | 1989-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989069669U JPH0411187Y2 (en) | 1989-06-14 | 1989-06-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0227587U true JPH0227587U (en) | 1990-02-22 |
| JPH0411187Y2 JPH0411187Y2 (en) | 1992-03-19 |
Family
ID=31294943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989069669U Expired JPH0411187Y2 (en) | 1989-06-14 | 1989-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0411187Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54160797U (en) * | 1978-04-29 | 1979-11-09 | ||
| CN100432702C (en) * | 2004-06-04 | 2008-11-12 | 安立产业机械株式会社 | metal detection device |
| JP2010156643A (en) * | 2008-12-31 | 2010-07-15 | Wellpine Communications Co Ltd | Apparatus for detecting sneaked metal matter |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100788711B1 (en) * | 2004-06-04 | 2007-12-26 | 안리츠 산키 시스템 가부시키가이샤 | Metal detection device |
| JP3896489B2 (en) * | 2004-07-16 | 2007-03-22 | 国立大学法人 岡山大学 | Magnetic detection device and substance determination device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56128593U (en) * | 1980-02-29 | 1981-09-30 |
-
1989
- 1989-06-14 JP JP1989069669U patent/JPH0411187Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56128593U (en) * | 1980-02-29 | 1981-09-30 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54160797U (en) * | 1978-04-29 | 1979-11-09 | ||
| CN100432702C (en) * | 2004-06-04 | 2008-11-12 | 安立产业机械株式会社 | metal detection device |
| JP2010156643A (en) * | 2008-12-31 | 2010-07-15 | Wellpine Communications Co Ltd | Apparatus for detecting sneaked metal matter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0411187Y2 (en) | 1992-03-19 |
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