DE3707210A1 - Induktives metallsuchgeraet - Google Patents
Induktives metallsuchgeraetInfo
- Publication number
- DE3707210A1 DE3707210A1 DE19873707210 DE3707210A DE3707210A1 DE 3707210 A1 DE3707210 A1 DE 3707210A1 DE 19873707210 DE19873707210 DE 19873707210 DE 3707210 A DE3707210 A DE 3707210A DE 3707210 A1 DE3707210 A1 DE 3707210A1
- Authority
- DE
- Germany
- Prior art keywords
- phase
- signal
- control
- metal detector
- 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
- 239000002184 metal Substances 0.000 title claims description 20
- 230000001939 inductive effect Effects 0.000 title claims description 3
- 238000004804 winding Methods 0.000 claims description 25
- 230000005284 excitation Effects 0.000 claims description 11
- 238000011156 evaluation Methods 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 230000001629 suppression Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002689 soil Substances 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
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)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873707210 DE3707210A1 (de) | 1987-03-06 | 1987-03-06 | Induktives metallsuchgeraet |
| US07/074,232 US4881036A (en) | 1987-03-06 | 1987-07-16 | Phase shift compensation for metal detection apparatus |
| EP88102790A EP0281014B1 (de) | 1987-03-06 | 1988-02-25 | Induktives Metallsuchgerät |
| DE8888102790T DE3865042D1 (de) | 1987-03-06 | 1988-02-25 | Induktives metallsuchgeraet. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873707210 DE3707210A1 (de) | 1987-03-06 | 1987-03-06 | Induktives metallsuchgeraet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3707210A1 true DE3707210A1 (de) | 1988-09-15 |
| DE3707210C2 DE3707210C2 (enExample) | 1989-10-26 |
Family
ID=6322415
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19873707210 Granted DE3707210A1 (de) | 1987-03-06 | 1987-03-06 | Induktives metallsuchgeraet |
| DE8888102790T Expired - Lifetime DE3865042D1 (de) | 1987-03-06 | 1988-02-25 | Induktives metallsuchgeraet. |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE8888102790T Expired - Lifetime DE3865042D1 (de) | 1987-03-06 | 1988-02-25 | Induktives metallsuchgeraet. |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US4881036A (enExample) |
| EP (1) | EP0281014B1 (enExample) |
| DE (2) | DE3707210A1 (enExample) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3839386A1 (de) * | 1988-11-22 | 1990-05-23 | Schaller Automation | Induktiver naeherungssensor |
| US5414411A (en) * | 1993-06-21 | 1995-05-09 | White's Electronics, Inc. | Pulse induction metal detector |
| 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 |
| EP2439559B1 (en) | 2010-10-07 | 2013-05-29 | Mettler-Toledo Safeline Limited | Method for operating of a metal detection system and metal detection system |
| CN103180760B (zh) | 2010-10-07 | 2016-10-26 | 梅特勒-托利多安全线有限公司 | 用于操作金属探测系统的方法以及金属探测系统 |
| US9018935B2 (en) | 2011-09-19 | 2015-04-28 | Mettler-Toledo Safeline Limited | Method for operating a metal detection apparatus and apparatus |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2438197A (en) * | 1942-12-31 | 1948-03-23 | Hazeltine Research Inc | Phase-selective variable-frequency oscillatory system |
| NL294973A (enExample) * | 1946-06-11 | |||
| FR1397251A (fr) * | 1964-02-06 | 1965-04-30 | Schlumberger Prospection | Perfectionnements aux appareils de mesure de conductivité électrique |
| US3471772A (en) * | 1967-05-02 | 1969-10-07 | Singer Inc H R B | Instrument for measuring the range and approximate size of buried or hidden metal objects |
| DE2058754B2 (de) * | 1970-11-30 | 1973-09-06 | Dr. Hans Boekels & Co, 5100 Aachen | Schaltungsanordnung fuer ein an bewegtem foerdergut eingesetztes metallsuchgeraet |
| US3835371A (en) * | 1972-07-27 | 1974-09-10 | M Mirdadian | Apparatus for detecting the presence of electrically conductive material within a given sensing area |
| US4084135A (en) * | 1975-08-25 | 1978-04-11 | The Goodyear Tire & Rubber Company | System and method for checking the sensitivity and performance of an electromagnetic field variation detector |
| US4249128A (en) * | 1978-02-06 | 1981-02-03 | White's Electronics, Inc. | Wide pulse gated metal detector with improved noise rejection |
| US4486713A (en) * | 1981-09-28 | 1984-12-04 | Gifford Jack D | Metal detector apparatus utilizing controlled phase response to reject ground effects and to discriminate between different types of metals |
| US4628265A (en) * | 1983-04-22 | 1986-12-09 | Frl, Inc. | Metal detector and classifier with automatic compensation for soil magnetic minerals and sensor misalignment |
| US4700139A (en) * | 1984-10-29 | 1987-10-13 | Garrett Electronics, Inc. | Metal detector circuit having selectable exclusion range for unwanted objects |
| GB8517257D0 (en) * | 1985-07-08 | 1985-08-14 | Goring Kerr Plc | Metal detector |
-
1987
- 1987-03-06 DE DE19873707210 patent/DE3707210A1/de active Granted
- 1987-07-16 US US07/074,232 patent/US4881036A/en not_active Expired - Lifetime
-
1988
- 1988-02-25 DE DE8888102790T patent/DE3865042D1/de not_active Expired - Lifetime
- 1988-02-25 EP EP88102790A patent/EP0281014B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| NICHTS ERMITTELT * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3707210C2 (enExample) | 1989-10-26 |
| EP0281014B1 (de) | 1991-09-25 |
| DE3865042D1 (de) | 1991-10-31 |
| EP0281014A2 (de) | 1988-09-07 |
| EP0281014A3 (en) | 1989-09-06 |
| US4881036A (en) | 1989-11-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee | ||
| 8339 | Ceased/non-payment of the annual fee |