DE1249416B - - Google Patents
Info
- Publication number
- DE1249416B DE1249416B DEW35544A DE1249416DA DE1249416B DE 1249416 B DE1249416 B DE 1249416B DE W35544 A DEW35544 A DE W35544A DE 1249416D A DE1249416D A DE 1249416DA DE 1249416 B DE1249416 B DE 1249416B
- Authority
- DE
- Germany
- Prior art keywords
- frequency
- transmitter
- responder
- receiver
- range
- 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.)
- Pending
Links
- 230000001702 transmitter Effects 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000009933 burial Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000002604 ultrasonography Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 210000000282 Nails Anatomy 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000005291 magnetic Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000001419 dependent Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005294 ferromagnetic Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001052 transient Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
- G01S13/751—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal
- G01S13/753—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors wherein the responder or reflector radiates a coded signal using frequency selective elements, e.g. resonator
-
- 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
- G01V3/15—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for use during transport, e.g. by a person, vehicle or boat
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Radar, Positioning & Navigation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Geophysics And Detection Of Objects (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1249416B true DE1249416B (es) | 1967-09-07 |
Family
ID=603518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEW35544A Pending DE1249416B (es) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1249416B (es) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2833509A1 (de) * | 1978-07-31 | 1980-02-14 | Siemens Ag | Einrichtung zur identifizierung und/oder 0rtung von gegenstaenden und personen |
| WO1983001306A1 (en) * | 1981-10-08 | 1983-04-14 | Willy Petersen | A marker for subterrenean marking and a novel application for such a marker |
| WO1983003134A1 (en) * | 1982-03-08 | 1983-09-15 | Willy Palle Pedersen | A terrestrial localization plant and auxiliaries for the use thereof |
-
0
- DE DEW35544A patent/DE1249416B/de active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2833509A1 (de) * | 1978-07-31 | 1980-02-14 | Siemens Ag | Einrichtung zur identifizierung und/oder 0rtung von gegenstaenden und personen |
| WO1983001306A1 (en) * | 1981-10-08 | 1983-04-14 | Willy Petersen | A marker for subterrenean marking and a novel application for such a marker |
| WO1983003134A1 (en) * | 1982-03-08 | 1983-09-15 | Willy Palle Pedersen | A terrestrial localization plant and auxiliaries for the use thereof |
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