JPS637634B2 - - Google Patents
Info
- Publication number
- JPS637634B2 JPS637634B2 JP56072716A JP7271681A JPS637634B2 JP S637634 B2 JPS637634 B2 JP S637634B2 JP 56072716 A JP56072716 A JP 56072716A JP 7271681 A JP7271681 A JP 7271681A JP S637634 B2 JPS637634 B2 JP S637634B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- metal
- transmitting coil
- coil
- frequency divider
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 claims description 42
- 229910052751 metal Inorganic materials 0.000 claims description 42
- 238000001514 detection method Methods 0.000 claims description 38
- 239000000284 extract Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 229910052742 iron Inorganic materials 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- -1 ferrous metals Chemical class 0.000 description 6
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 235000015429 Mirabilis expansa Nutrition 0.000 description 1
- 244000294411 Mirabilis expansa Species 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 235000013536 miso Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
- G01V3/104—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils
- G01V3/105—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops
- G01V3/107—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils using several coupled or uncoupled coils forming directly coupled primary and secondary coils or loops using compensating coil or loop arrangements
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Description
【発明の詳細な説明】
この発明は被検査体に混入した金属を検出する
金属検出装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal detection device for detecting metal mixed into an object to be inspected.
製品中に金属異物が混入している場合（例えば
ハム、みそ、菓子などの食品、あるいは薬品、あ
るいはゴム、ビニール、ペイントなどの加工材料
などに金属異物が混入している場合）、衛生上の
大きなトラブルとなつたり、製造機械に損傷を与
えるおそれがあるため、金属検出を行うことが必
要である。 If metal foreign matter is mixed into the product (e.g. food such as ham, miso, confectionery, or medicine, or processed materials such as rubber, vinyl, paint, etc.), hygiene issues may occur. It is necessary to perform metal detection because there is a risk of serious trouble or damage to the manufacturing machine.
第１図はこのために一般に用いられている金属
検出装置の検出原理を示す図である。すなわち、
１個の送信コイルＰと、２個の受信コイルS1，S2
との間を、コンベヤなどで被検査体Ｗを通過させ
る。送信コイルＰには高周波電流を供給して交番
磁界を発生させる。そして磁力線が２個の受信コ
イルS1，S2に等量交わるように受信コイルS1，S2
は配置されている。被検査体Ｗに金属が混入して
いない場合には磁力線に被検査体Ｗは影響を与え
ない。金属がもし混入していれば、金属によつて
磁力線に変化が生じて、２個の受信コイルS1，S2
に交わる磁力線は等量でなくなる。このため金属
の存在は両受信コイルS1，S2における誘起電圧
E1，E2の差として検出される。 FIG. 1 is a diagram showing the detection principle of a metal detection device generally used for this purpose. That is,
One transmitting coil P and two receiving coils S 1 and S 2
The object W to be inspected is passed between the two using a conveyor or the like. A high frequency current is supplied to the transmitting coil P to generate an alternating magnetic field. Then, the receiving coils S 1 and S 2 are connected so that the lines of magnetic force intersect the two receiving coils S 1 and S 2 by equal amounts.
is located. If no metal is mixed into the object W to be inspected, the object W to be inspected does not affect the lines of magnetic force. If metal is mixed in, the magnetic field lines will change due to the metal, and the two receiving coils S 1 and S 2
The magnetic field lines that intersect are no longer equal. Therefore, the presence of metal increases the induced voltage in both receiving coils S 1 and S 2 .
It is detected as the difference between E 1 and E 2 .
しかして、前記送信コイルに供給される高周波
電流の周波数は、被検査体、検出すべき金属に応
じてそれぞれ最適の周波数が存在し、その最適の
周波数の場合に最も検出感度が良くなることが知
られており、このため従来では金属検出装置を目
的とする周波数ごとに専用に用いているため、被
検査体、検出すべき金属の種類に応じた複数台の
金属検出装置が必要であつた。 Therefore, the frequency of the high-frequency current supplied to the transmitting coil has an optimal frequency depending on the object to be inspected and the metal to be detected, and the detection sensitivity is most likely to be obtained at the optimal frequency. For this reason, in the past, metal detection devices were used exclusively for each target frequency, requiring multiple metal detection devices depending on the object to be inspected and the type of metal to be detected. .
この発明は上記の欠点を改め、周波数を複数種
に切替えできるようにして複数種の被検査体およ
び金属を一台で検査できるようにした金属検出装
置を提供することを目的としている。 It is an object of the present invention to correct the above-mentioned drawbacks and provide a metal detection device that can switch the frequency to a plurality of types so that a plurality of types of objects and metals can be inspected with one device.
以下、図面によつてこの発明の実施例を説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第２図はこの発明の一実施例による金属検出装
置の構成の概略を示すブロツク図である。 FIG. 2 is a block diagram schematically showing the structure of a metal detection device according to an embodiment of the present invention.
発振器１の発振周波数は分周器２で所望の周波
数に分周される。この分周器２の矩形波信号は電
圧増幅器３で正弦波に変換されて検出コイル部４
の送信コイルＰに供給される。 The oscillation frequency of the oscillator 1 is divided by a frequency divider 2 to a desired frequency. The rectangular wave signal of the frequency divider 2 is converted into a sine wave by the voltage amplifier 3 and then is converted into a sine wave by the detection coil section 4.
is supplied to the transmitting coil P.
２個の受信コイルS1，S2には誘起電圧が生じる
が、バランス回路５からは、送信コイルＰと受信
コイルS1，S2間を通る被検査体に金属が存在して
いる場合にのみ不平衡出力が生じる。 An induced voltage is generated in the two receiving coils S 1 and S 2 , but the balance circuit 5 generates an induced voltage when there is metal in the object to be inspected that passes between the transmitting coil P and the receiving coils S 1 and S 2 . Only unbalanced output occurs.
前記分周器２は切替スイツチ２１で例えば３種
類の周波数を選択できるように構成され、発振器
１の発振周波数を例えば1/4分周器２２で分周し
た周波数、それをさらに1/3分周器２３で分周し
た周波数、さらに1/2分周器２４で分周した周波
数が切替スイツチ２１のそれぞれａ、ｂ、ｃに接
続されている。なお、前記したように分周器２の
矩形波出力は電圧増幅器３で正弦波に変換される
ため、分周器２の最終段には1/2分周器２５を設
けて分周器２の矩形波出力信号のデユーテイ比を
１：１にしている。 The frequency divider 2 is configured such that, for example, three types of frequencies can be selected by a changeover switch 21, and includes a frequency obtained by dividing the oscillation frequency of the oscillator 1 by, for example, a 1/4 frequency divider 22, and a frequency that is further divided by 1/3. The frequency divided by the frequency divider 23 and the frequency further divided by the 1/2 frequency divider 24 are connected to the changeover switches 21, a, b, and c, respectively. As mentioned above, since the rectangular wave output of the frequency divider 2 is converted into a sine wave by the voltage amplifier 3, a 1/2 frequency divider 25 is provided at the final stage of the frequency divider 2. The duty ratio of the rectangular wave output signal is set to 1:1.
送信コイルＰおよび受信コイルS1，S2は周波数
に応じた巻数をそれぞれ切替スイツチで選択でき
るようになつている。すなわち、第３図に示すよ
うに送信コイルＰ、受信コイルS1，S2はいずれも
分割された２個のコイルPa，Pb，S1a，S1b，S2a，
S2bで構成され、切替スイツチ４１，４２，４３
でそれぞれ２段階に切替えできる。分周器２の切
替スイツチ２１をａに接続して最も高い周波数を
選んだ場合には、これに対応して送出コイルＰ、
受信コイルS1，S2の切替スイツチ４１，４２，４
３をａ側に切替えてコイル巻数を少なくする。 The number of turns of the transmitting coil P and the receiving coils S 1 and S 2 can be selected depending on the frequency using a changeover switch. That is, as shown in FIG. 3, the transmitter coil P and the receiver coils S 1 and S 2 are each divided into two coils P a , P b , S 1a , S 1b , S 2a ,
Consists of S 2b , selector switches 41, 42, 43
You can switch between two stages with . When the selector switch 21 of the frequency divider 2 is connected to a to select the highest frequency, the sending coil P,
Switches 41, 42, 4 for receiving coils S 1 and S 2
3 to the a side to reduce the number of coil turns.
バランス回路５からの不平衡出力は検出回路１
０で増幅されフイルタなどで雑音を除去されて金
属検出信号が抽出される。 The unbalanced output from the balance circuit 5 is sent to the detection circuit 1.
The metal detection signal is amplified by 0, noise is removed by a filter, etc., and the metal detection signal is extracted.
したがつて、被検査体の材質、検出すべき金属
に応じて分周器２の切替スイツチ２１をａ〜ｃの
いずれかに接続することにより、送信コイルＰに
は３種類のうちの最適の周波数の高周波電流が供
給され、また送信コイルＰ、受信コイルS1，S2の
巻数を周波数に応じて切替えできるので金属検出
を適切に行うことができる。 Therefore, by connecting the selector switch 21 of the frequency divider 2 to one of a to c depending on the material of the object to be inspected and the metal to be detected, the transmitting coil P can be selected from among the three types. Since a high frequency current is supplied and the number of turns of the transmitting coil P and receiving coils S 1 and S 2 can be changed according to the frequency, metal detection can be performed appropriately.
なお分周器２における周波数の切替えをさらに
多段階にすることもでき、また送信コイル、受信
コイルの巻数の切替えもさらに多段階にすること
もできる。 Note that the frequency in the frequency divider 2 can be switched in more steps, and the number of turns of the transmitter coil and the receiver coil can also be switched in more steps.
第４図は第３図に示した金属検出装置を、金属
のうち鉄の検出と非鉄金属の検出を同時に行なえ
るようにした例を示している。 FIG. 4 shows an example in which the metal detection device shown in FIG. 3 is adapted to detect iron and non-ferrous metals at the same time.
バランス回路５の不平衡出力は交流増幅器６で
増幅されて第１のチヨツパ７ａ、第２のチヨツパ
７ｂ、バランス表示器８に送られる。 The unbalanced output of the balance circuit 5 is amplified by an AC amplifier 6 and sent to a first chopper 7a, a second chopper 7b, and a balance indicator 8.
前記分周器２からは前記電圧増幅器３への出力
信号と同一の周波数のチヨツパ信号が出力されて
いる。これら２つのチヨツパ信号は互いに位相が
90゜異なり、いずれもデユーテイ比１：１の信号
である。 The frequency divider 2 outputs a chopper signal having the same frequency as the output signal to the voltage amplifier 3. These two chopper signals are out of phase with each other.
They differ by 90 degrees, and both are signals with a duty ratio of 1:1.
チヨツパ信号は鉄を検出するための第１のチヨ
ツパ７ａへ送られ、90゜位相の進んだチヨツパ信
号は非鉄金属を検出するための第２のチヨツパ７
ｂへ送られる。交流増幅器６の出力信号は互いに
90゜位相のずれたチヨツパ信号でそれぞれチヨツ
ピングされる。 The chopper signal is sent to the first chopper 7a for detecting iron, and the chopper signal with a phase lead of 90° is sent to the second chopper 7a for detecting non-ferrous metals.
Sent to b. The output signals of the AC amplifier 6 are
They are each chopped using chopper signals with a 90° phase shift.
送信コイルに印加される高周波電流の位相と検
出感度との関係は、鉄の場合の検出感度の最良点
と非鉄金属の検出感度の最良点の位相が約90゜ず
れているので、90゜位相の異なる２つのチヨツパ
信号によつて２つのチヨツパ７ａ，７ｂで、バラ
ンス回路５からの不平衡信号をそれぞれ90゜位相
をずらして部分的に取り出せば、第１のチヨツパ
７ａからは鉄による送信コイルＰからの磁力線へ
の影響を最も感度よく含んだ信号が得られ、第２
のチヨツパ７ｂからは非鉄金属による磁力線への
影響を最も感度よく含んだ信号が得られる。 The relationship between the phase of the high-frequency current applied to the transmitting coil and the detection sensitivity is that the best point of detection sensitivity for iron and the best point of detection sensitivity for non-ferrous metals are out of phase by about 90 degrees, so the phase is 90 degrees. If the two choppers 7a and 7b partially extract the unbalanced signal from the balance circuit 5 with a phase shift of 90 degrees using two chopper signals with different values, the first chopper 7a outputs a transmission coil made of iron. A signal that includes the influence on the magnetic field lines from P with the highest sensitivity is obtained, and the second
The chopper 7b provides a signal that includes the influence of non-ferrous metals on magnetic lines of force with the highest sensitivity.
なお、製品材料自体の影響（マテリアル・エフ
エクト）を取り除いたり、鉄や非鉄金属の検出感
度を最良の点に合わせるため、分周器２の出力信
号の位相と送信コイルＰへ印加する電圧増幅器２
の出力信号の位相差を調整する必要があるため、
位相調整器を電圧増幅器３又は分周器２に設け、
位相表示器９に電圧増幅器３の出力信号と分周器
２の出力信号の位相差を表示させ、この表示を見
ながら位相調整を行う。またバランス表示器８の
表示を見ながらバランス回路５に設けた調整手段
で、バランス回路５の出力電圧レベルを調整す
る。 In addition, in order to eliminate the influence of the product material itself (material effect) and to optimize the detection sensitivity of ferrous and non-ferrous metals, the phase of the output signal of the frequency divider 2 and the voltage amplifier 2 applied to the transmitting coil P are adjusted.
It is necessary to adjust the phase difference of the output signal of
A phase adjuster is provided in the voltage amplifier 3 or the frequency divider 2,
The phase difference between the output signal of the voltage amplifier 3 and the output signal of the frequency divider 2 is displayed on the phase indicator 9, and the phase adjustment is performed while looking at this display. Further, while watching the display on the balance display 8, the output voltage level of the balance circuit 5 is adjusted using the adjustment means provided in the balance circuit 5.
第１のチヨツパ７ａ、第２のチヨツパ７ｂの出
力信号はそれぞれローパスフイルタ１１ａ，１１
ｂ、ハイパスフイルタ１２ａ，１２ｂによつて、
被検査体を移動させるコンベヤの振動によるノイ
ズ、検出コイル部４の近在の他の金属によるノイ
ズなどが除去され、検波増幅器１３ａ，１３ｂで
検波、増幅された鉄検出信号、非鉄金属検出信号
がそれぞれ鉄表示器１４ａ、非鉄表示器１４ｂに
入力し、鉄の検出レベル、非鉄金属の検出レベル
が表示される。 The output signals of the first chopper 7a and the second chopper 7b are passed through low-pass filters 11a and 11, respectively.
b. By high pass filters 12a and 12b,
Noise caused by the vibration of the conveyor that moves the inspected object, noise caused by other metals near the detection coil section 4, etc. are removed, and the iron detection signal and nonferrous metal detection signal detected and amplified by the detection amplifiers 13a and 13b are The signals are input to the iron display 14a and the non-ferrous metal display 14b, respectively, and the iron detection level and non-ferrous metal detection level are displayed.
比較器１５ａ，１５ｂではこの検出レベルがあ
る基準レベルより大である場合に出力を生じ、こ
の出力によつてリレー１６が動作する。 Comparators 15a and 15b produce an output when this detection level is higher than a certain reference level, and this output causes relay 16 to operate.
以上説明したように、この発明による金属検出
装置では被検査体、検出すべき金属の種類に応じ
て送信コイルに供給される高周波電流の周波数を
切替えられるようにしたから、一台の金属検出装
置のみで種々の被検査体、検出すべき金属につい
ての高感度の検査ができ、従来のように各周波数
ごとに別々に金属検出装置を用意する必要がなく
なる。 As explained above, in the metal detection device according to the present invention, the frequency of the high-frequency current supplied to the transmitting coil can be switched depending on the object to be inspected and the type of metal to be detected. High-sensitivity inspection of various objects to be inspected and the metals to be detected can be performed with only one sensor, and there is no need to prepare separate metal detection devices for each frequency as in the past.
第１図は金属検出装置の検出原理を示す図、第
２図はこの発明の一実施例を示すブロツク図、第
３図は検出コイル部を示す図、第４図は鉄および
非鉄金属検出用の金属検出装置を示すブロツク図
である。
１…発振器、２…分周器、３…電圧増幅器、４
…検出コイル部、５…バランス回路、６…交流増
幅器、７ａ…第１のチヨツパ、７ｂ…第２のチヨ
ツパ、８…バランス表示器、９…位相表示器、１
１ａ，１１ｂ…ローパスフイルタ、１２ａ，１２
ｂ…ハイパスフイルタ、１３ａ，１３ｂ…検波増
幅回路、１４ａ…鉄表示器、１４ｂ…非鉄表示
器、１５ａ，１５ｂ…比較器、１６…リレー、２
１…切替スイツチ、２２…1/4分周器、２３…1/3
分周器、２４，２５…1/2分周器、４１，４２，
４３…切替スイツチ、Ｐ…送信コイル、S1，S2…
受信コイル、E1，E2…誘起電圧、Ｗ…被検査体。
Fig. 1 is a diagram showing the detection principle of the metal detection device, Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is a diagram showing the detection coil section, and Fig. 4 is for detecting ferrous and non-ferrous metals. FIG. 2 is a block diagram showing a metal detection device according to the present invention. 1... Oscillator, 2... Frequency divider, 3... Voltage amplifier, 4
...detection coil section, 5...balance circuit, 6...AC amplifier, 7a...first chopper, 7b...second chopper, 8...balance indicator, 9...phase indicator, 1
1a, 11b...Low pass filter, 12a, 12
b...High pass filter, 13a, 13b...Detection amplifier circuit, 14a...Ferrous indicator, 14b...Nonferrous indicator, 15a, 15b...Comparator, 16...Relay, 2
1...Selector switch, 22...1/4 frequency divider, 23...1/3
Frequency divider, 24, 25...1/2 frequency divider, 41, 42,
43...Selector switch, P...Transmission coil, S1 , S2 ...
Receiving coil, E1 , E2 ...induced voltage, W...test object.
Claims (1)
界を発生させる送信コイルと、該送信コイルが発
生する磁界中に配置された第１、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
の誘起電圧の変動を不平衡信号として出力するバ
ランス回路と、該バランス回路の出力から金属検
出信号を抽出する検出手段とを備えた金属検出装
置において；前記発振器と送信コイルとの間に切
替スイツチによつて複数の分周周波数のいずれか
を選択して送信コイルへ出力する分周器を設けた
ことを特徴とする金属検出装置。1. An oscillator, a transmitting coil that receives the output of the oscillator and generates an alternating magnetic field, first and second receiving coils that are placed in the magnetic field generated by the transmitting coil, and a receiving coil that passes through the magnetic field. a balance circuit that outputs fluctuations in the induced voltage of the first and second receiving coils caused by metal mixed in the test object as an unbalanced signal; and a detection means that extracts a metal detection signal from the output of the balance circuit. In the metal detection device, a frequency divider is provided between the oscillator and the transmitting coil for selecting one of a plurality of divided frequencies by a changeover switch and outputting the selected frequency to the transmitting coil. Metal detection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072716A JPS57187650A (en) | 1981-05-13 | 1981-05-13 | Metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56072716A JPS57187650A (en) | 1981-05-13 | 1981-05-13 | Metal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57187650A JPS57187650A (en) | 1982-11-18 |
| JPS637634B2 true JPS637634B2 (en) | 1988-02-17 |
Family
ID=13497347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56072716A Granted JPS57187650A (en) | 1981-05-13 | 1981-05-13 | Metal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57187650A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734742U (en) * | 1993-12-16 | 1995-06-27 | サッポロビール株式会社 | Racks and rack units for bottled beverages |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6249283A (en) * | 1985-08-28 | 1987-03-03 | Nec Corp | Ferrite proximity sensor |
| US4647910A (en) * | 1985-09-17 | 1987-03-03 | Allied Corporation | Selector for AC magnetic inductive field receiver coils |
| ES2006048A6 (en) * | 1988-01-15 | 1989-04-01 | Gosalbez Gosalbez Fco Jose | Magnetic metal detector system. |
| DE102004047188B4 (en) * | 2004-09-29 | 2022-10-27 | Robert Bosch Gmbh | Device for locating metallic objects |
| EP2439559B1 (en) | 2010-10-07 | 2013-05-29 | Mettler-Toledo Safeline Limited | Method for operating of a metal detection system and metal detection system |
| EP2439560B1 (en) | 2010-10-07 | 2013-05-29 | Mettler-Toledo Safeline Limited | Method for monitoring the operation of a metal detection system and metal detection system |
| CN103180760B (en) | 2010-10-07 | 2016-10-26 | 梅特勒-托利多安全线有限公司 | For operating method and the metal detecting system of metal detecting system |
| US9018935B2 (en) | 2011-09-19 | 2015-04-28 | Mettler-Toledo Safeline Limited | Method for operating a metal detection apparatus and apparatus |
-
1981
- 1981-05-13 JP JP56072716A patent/JPS57187650A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0734742U (en) * | 1993-12-16 | 1995-06-27 | サッポロビール株式会社 | Racks and rack units for bottled beverages |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57187650A (en) | 1982-11-18 |
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