RADIODETECTION LIMITED Patent applications |
Patent application number | Title | Published |
20120143532 | Detector for Detecting a Current Carrying Conductor - A locator for locating a concealed conductor comprises a first field detector operable to detect an alternating magnetic field along a first axis parallel to a primary axis of the locator; a second field detector, displaced from the first field detector and operable to detect an alternating magnetic field along a second axis parallel to the primary axis of the locator; and a processor operable to calculate a difference between a field detected by the first detector and a field detected by the second detector, and to calculate an indication of the lateral displacement of the concealed conductor from the primary axis of the locator using the difference. | 06-07-2012 |
20120139525 | Detector for Detecting a Current Carrying Conductor - A locator for determining the location and/or orientation of a concealed conductor, comprising a reference field detector operable to detect an alternating magnetic field along a reference axis; a first field detector operable to detect an alternating magnetic field along a first axis; and a processor operable to calculate an in-phase component of a signal detected by the first field detector, the in-phase component being in phase with a signal detected at the reference field detector and to calculate a signal indicative of a position of the concealed conductor relative to the locator using at least the in-phase component. | 06-07-2012 |
20100060285 | Detector for Detecting a Current Carrying Conductor and a Method of Validating Operation of the Detector - A detector for detecting a buried conductor comprises a plurality of antennas B, T. Each antenna B, T has a winding wound around the antenna, the winding being connected to a current source for providing a predefined current in the winding. When the predefined current is applied to the winding an electromagnetic field is generated at the antenna which induces a test current in the antenna. The test current is compared to calibration data stored in the detector to validate the correct operation of the detector. | 03-11-2010 |
20100004880 | Detector for Calculating the Distortion of an Electromagnetic Field Produced by a Buried Current Carrying Conductor - A detector for calculating the distortion of an electromagnetic field produced by a buried current carrying conductor comprises three antennas B, M, T. Outputs of two pairs of antennas are compared and the depth of the buried conductor is calculated using two different methods. If there is a significant difference in the two calculated depths then it is deemed that the electromagnetic field produced by the buried current carrying conductor is significantly distorted by the material in which the conductor is buried. | 01-07-2010 |
20100001732 | Detector for Calculating a Depth of a Buried Conductor - A detector for calculating a depth of a buried conductor comprises three parallel antennas B, M, T. The second antenna M is spaced a distance s from the first antenna B and the third antenna T is a distance 2s from the first antenna B and a distance s from the second antenna M. The outputs of the first and second antennas B, M are compared and the outputs from the second and third antennas M, T are compared. The depth of the buried conductor is calculated based on the first and second compared values. | 01-07-2010 |
20100001731 | Transmitter of a System for Detecting a Buried Conductor - A system for detecting a buried conductor comprises a transmitter for generating a test signal in the buried conductor and a detector for detecting an electromagnetic signal resulting from the test signal flowing in the buried conductor. The transmitter comprises a waveform generator for generating a drive waveform signal, a power supply, an amplifier, connected to the power supply and the waveform generator for producing an output drive signal based on the drive waveform signal and an output circuit for acting on the output drive signal to generate an output signal having a current and a voltage. In-phase and quadrature components of the current and voltage of the output signal are fed back for controlling the amplifier. | 01-07-2010 |
20100001714 | Detector for Calculating the Depth of a Buried Conductor - A detector for calculating a depth of a buried conductor comprises a plurality of antennas B, M T for detecting an electromagnetic field radiated by the conductor and means for calculating the depth of said conductor based on the field detected by the antennas B, M, T. The calculated depth of the conductor is displayed when one or more predetermined criteria are satisfied. | 01-07-2010 |
20100001713 | System for and Method of Detecting a Buried Conductor - A system for detecting a buried conductor comprises a transmitter for producing an alternating test current in the buried conductor and a receiver for detecting an electromagnetic field produced by the test current in the buried conductor. A communication link is provided between the receiver and the transmitter. The test current comprises first and second components of different frequency. The receiver monitors the phase creepage of the first and second components and controls the transmitter to reset the phase difference between the first and second components as phase creepage increases. | 01-07-2010 |
20100001712 | System for and Method of Detecting a Buried Conductor - A system for detecting a buried conductor comprises a transmitter for producing an alternating test current in the buried conductor and a receiver for detecting an electromagnetic field produced by the test current in the buried conductor. A communication link is provided between the receiver and the transmitter. The receiver measures the signal to noise ratio, SNR, of the electromagnetic field produced by the test current and if the SNR is below a threshold then the receiver controls the transmitter to set frequency and/or power characteristics of the test current. | 01-07-2010 |