173323 ⎘
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
TRANSIENT ELECTROMAGNETIC (TEM) EXPLORATION SYSTEM WITH ADJUSTABLE COMPENSATION FOR PRIMARY FIELD ELIMINATION
#2ASYNCHRONOUS METHOD FOR SAMPLING SIGNALS IN METAL DETECTORS
#3METHOD AND APPARATUS FOR AUTONOMOUS GRAVITY AND/OR MAGNETIC FIELD MEASUREMENT
#4GROUND SENSOR
#5METHOD FOR OPERATING A METAL DETECTOR AND METAL DETECTOR
#6METHOD FOR OPERATING A METAL DETECTOR AND METAL DETECTOR
#7METAL DETECTION APPARATUS WITH A TEST DEVICE AND TEST DEVICE
#8SYSTEM AND METHOD OF OBJECT DETECTION USING A MULTI PROPERTY ARRAY BASED OBJECT DETECTION SYSTEM
#9Asynchronous method for sampling signals in metal detectors
#10Magnetic Field Antenna of a Metal Detector
#11Apparatus and method for measuring thickness of tubings in downhole applications
#12METAL DETECTOR
#13Low-Bulk Integrated Detector
#14RECEPTION COMPENSATION APPARATUS BASED ON AIRBORNE TRANSIENT ELECTROMAGNETIC METHOD
#15METAL DETECTOR
#16Metal detector, handheld power tool comprising this metal detector, metal detection method, and metal detection program
#17Dipole locator using balanced antenna signals
#18Metal object detecting device
#19Asynchronous method for sampling signals in metal detectors
#20Metal detector coil configuration to eliminate orientation effect
#21Programmable universal probe
#22RECEIVING COMPENSATION APPARATUS FOR AIRBORNE TRANSIENT ELECTROMAGNETIC METHOD
#23Method for operating a metal detector and metal detector
#24Method for operating a metal detector and metal detector
#25System and method for non-ionizing non-destructive detection of structural defects in materials
#26Dipole locator using balanced antenna signals
#27Inductive Proximity Switch
#28Sensor for detecting the contents of a bore
#29Method for operating a multi-frequency metal detector and multi-frequency metal detector
#30Magnetic field sensing apparatus
#31Magnetic field sensor with error calculation
#32ELECTROMAGNETIC SURVEY SYSTEM BUCKING SYSTEM ENHANCEMENT
#33Self-balance noise reduction metal detection double-coil
#34Method for analysing measurement signal of metal sensor and detecting object via metal sensor
#35Method for testing a metal detection apparatus and metal detection apparatus
#36Spatially resolved metal detector
#37Methods and apparatus for collocating electromagnetic coils and electronic circuits
#38Magnetic field sensing apparatus
#39Utility locator apparatus, systems, and methods
#40Coil architecture for inductive sensors
#41Line locator with a metal detector
#42Sensor having rotationally offset coil pairs and differently formed receiving coils for locating metal or magnetic objects
#43Apparatus and methods to find a position in an underground formation
#44Method for monitoring the operation of a metal detection system and metal detection system
#45Non-contact fluid resistivity measurement
#46Method and sensor unit for locating and/or detecting metallic or metal-containing objects and materials
#47Techniques for co-siting a metal detector with another detector
#48Metal detector for production and packaging lines
#49Metal sensor
#50Metal sensor
#51Bucking circuit for annulling a magnetic field
#52Sensor for locating metal objects and associated coil
#53Quad-gradient coils for use in locating systems
#54Coil arrangement for a magnetic induction impedance measurement apparatus comprising a partly compensated magnetic excitation field in the detection coil
#55Metal detector for locating metal objects
#56Detection of a metal or magnetic object
#57Buried object detector
#58Transmit signal of a metal detector controlled by feedback loops
#59Method for separating target signals from unwanted signals in a metal detector
#60Shielded double-coil multilayer assembly for inductive detector
#61METAL DETECTOR SENSOR HEAD
#62Metal detection apparatus
#63Method for operating a metal detection system and metal detection system
#64Method for monitoring the operation of a metal detection system and metal detection system
#65Method for operating of a metal detection system and metal detection system
#66Metal detector
#67METAL DETECTOR SENSOR HEAD
#68Metal detector having constant reactive transmit voltage applied to a transmit coil
#69Balancing circuit for a metal detector
#70Device and Method for the Detection of Electrically Conducting Objects
#71METAL DETECTOR WITH IMPROVED MAGNETIC RESPONSE APPLICATION
#72Metal detector having constant reactive transmit voltage applied to a transmit coil
#73Ground conductivity meter with automatic calibration
#74METHOD AND APPARATUS FOR CONDUCTING ELECTROMAGNETIC EXPLORATION
#75Resonant pulse induction metal detector that transmits energy from high voltage flyback pulses
#76Balancing circuit for a metal detector
#77Inductive proximity detector with switched windings
#78Gradiometric Directional Metal Detector
#79Sensor For Locating Metallic Objects, And Measuring Device with Such a Sensor
#80Oscillator coil geometry for radio frequency metal detectors
#81Metal object detecting apparatus
#82Detector for locating metallic objects with inductively coupled transmit and receive coils
#83Device for Locating Metallic Objects and Methods for Adjusting Such a Device
#84Process and device for electromagnetically based detection of field-influencing parts in a material flow
#85Metal detector with improved receiver coil
#86Measuring equipment and method for mapping the geology in an underground formation
#87Auto nulling of induction balance metal detector coils