JPS5949985U - metal detector - Google Patents
metal detectorInfo
- Publication number
- JPS5949985U JPS5949985U JP14663882U JP14663882U JPS5949985U JP S5949985 U JPS5949985 U JP S5949985U JP 14663882 U JP14663882 U JP 14663882U JP 14663882 U JP14663882 U JP 14663882U JP S5949985 U JPS5949985 U JP S5949985U
- Authority
- JP
- Japan
- Prior art keywords
- sampling
- output
- metal detector
- detecting
- differential output
- 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
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図はこの考案の一実施例を示す金属探知器の回路ブ
ロック図、第２図は第１図に示す実施例金属探知器の動
作を説明するための信号波形図である。
１：高周波信号発生器、２：励磁コイル、３・４：受信
コイル、５：アナログ加算器、６：高周波増幅器、７・
８：検波回路、９・１０：直流増幅器、１１・１２：比
例積分回路、１３・１４：サンプルホールド回路、１５
・１６：変調回路、１７・１８：コンパレータ、１９：
オア回路、２０：タイマ回路、゛′２１゛：クロツク信
号発生器、２２：禁止ゲート。FIG. 1 is a circuit block diagram of a metal detector showing an embodiment of this invention, and FIG. 2 is a signal waveform diagram for explaining the operation of the metal detector of the embodiment shown in FIG. 1: High frequency signal generator, 2: Excitation coil, 3.4: Receiving coil, 5: Analog adder, 6: High frequency amplifier, 7.
8: Detection circuit, 9/10: DC amplifier, 11/12: Proportional/integral circuit, 13/14: Sample hold circuit, 15
・16: Modulation circuit, 17・18: Comparator, 19:
OR circuit, 20: timer circuit, '21': clock signal generator, 22: inhibit gate.
Claims (1)
界を１対の受信コイルで受け、その差動出力により、前
記励磁コイル内に存在する金属体を検知する金属探知器
において、 前記差動出力を検波する検波手段と、この検波手段出力
を所定周期でサンプル出力するサンプリング手段と、こ
のサンプリング出力で前記差動出力を零値に強制する手
段と、前記検波手段出力が所定レベルを越えたか否かを
検知する手段と、この検知手段の検知出力で前記サンプ
リング手段のサンプリング動作を所定時間停止させる手
段とを備えたことを特徴とする金属探知器。[Claims for Utility Model Registration] A metal detector that receives a magnetic field generated by an excitation coil excited by a high-frequency signal with a pair of receiving coils, and detects a metal object present in the excitation coil by the differential output thereof. , a detection means for detecting the differential output; a sampling means for sampling the output of the detection means at a predetermined period; a means for forcing the differential output to a zero value with the sampling output; A metal detector comprising: means for detecting whether or not a predetermined level has been exceeded; and means for stopping the sampling operation of the sampling means for a predetermined period of time based on the detection output of the detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14663882U JPS5949985U (en) | 1982-09-27 | 1982-09-27 | metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14663882U JPS5949985U (en) | 1982-09-27 | 1982-09-27 | metal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5949985U true JPS5949985U (en) | 1984-04-03 |
| JPS636707Y2 JPS636707Y2 (en) | 1988-02-25 |
Family
ID=30326345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14663882U Granted JPS5949985U (en) | 1982-09-27 | 1982-09-27 | metal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5949985U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139803A (en) * | 1984-07-31 | 1986-02-26 | Japanese National Railways<Jnr> | Levitating coil displacement detector |
| JP2014077645A (en) * | 2012-10-09 | 2014-05-01 | Alnic Inc | Vibration sensing device |
-
1982
- 1982-09-27 JP JP14663882U patent/JPS5949985U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6139803A (en) * | 1984-07-31 | 1986-02-26 | Japanese National Railways<Jnr> | Levitating coil displacement detector |
| JP2014077645A (en) * | 2012-10-09 | 2014-05-01 | Alnic Inc | Vibration sensing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS636707Y2 (en) | 1988-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2635714B2 (en) | DC bias detection method for transformer core | |
| JPS5949985U (en) | metal detector | |
| JPS6059121U (en) | Electromagnetic load compensation scale | |
| SU832502A1 (en) | Method of device measuring magnetic field | |
| JPS5857757U (en) | clamp ammeter | |
| JPS58104929U (en) | Molten steel level measuring device | |
| JPS61191930A (en) | Magnetostrictive type torque detector | |
| JPS60139226U (en) | electromagnetic flow meter | |
| JPS6439571A (en) | Method and device for measuring magnetic permeability | |
| SU907480A1 (en) | Device for measuring differential reversible and non-reversible magnetic permeability | |
| JPS58130221U (en) | electromagnetic flow meter | |
| SU834622A1 (en) | Magnetometer | |
| JPS6121969U (en) | Rotation speed detection device | |
| JPS58167410U (en) | Superconducting coil measuring device | |
| JPS5839587U (en) | magnetic sensor | |
| JPS5960563U (en) | voltage measuring device | |
| JPS59109925U (en) | electromagnetic flow meter | |
| JPS6072580U (en) | NMR locking device | |
| JPS5842907U (en) | Quench detection device for superconducting coils | |
| JPS5826674U (en) | Characteristic measurement circuit of reverberation adding device | |
| JPS60125566U (en) | Magnetic field correction device in nuclear magnetic resonance equipment | |
| JPS6080304U (en) | Device for detecting the center position of a recess in a metal object | |
| JPS5847730U (en) | mold level meter | |
| JPS6124682U (en) | High sensitivity sensor | |
| JPS60107755U (en) | nuclear magnetic resonance apparatus |