Validating Operation of an Electronic Marker Locator

摘要

A locator for locating a buried electromagnetic marker is operable to generate a test signal in order to validate that the locator is operating in accordance with calibration data. The locator comprises a transmission antenna and a first reception antenna. The transmission antenna is configured to generate a first oscillatory magnetic field to couple with an electromagnetic marker and the first reception antenna is configured to receive an oscillatory magnetic field emitted by the electromagnetic marker. In order to validate the operation of the locator, the transmission antenna is configured to generate a test oscillatory magnetic field, and the first reception antenna is configured to receive the test oscillatory magnetic field and thereby generate a first detected test signal.

主权项

1. A locator for locating a buried electromagnetic marker, the locator comprising:
a transmission antenna for generating a first oscillatory magnetic field to couple with an electromagnetic marker; and a first reception antenna for receiving an oscillatory magnetic field emitted by the electromagnetic marker, the transmission antenna being configured to generate a test oscillatory magnetic field, the first reception antenna being configured to receive the test oscillatory magnetic field and thereby generate a first detected test signal, the locator further comprising a first analogue to digital converter configured to generate a first digitised test signal from the first detected test signal, the first digitised test signal being indicative of the test oscillatory magnetic field received by the first reception antenna.