Automatic gain control for a line locator
First Claim
Patent Images
1. A line locator for locating an elongated concealed conductor, comprising:
- at least one observed channel that provides an observed signal in response to an output signal from an observed sensor and an AGC signal; and
a reference channel that generates the AGC signal in response to an output sensor from a reference sensor, the reference sensor being further from the elongated concealed conductor than the observed sensor of the at least one observed channel.
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Abstract
An automatic gain control (AGC) system for use in line locators that detect concealed conductors is presented. The AGC system includes determining an AGC signal from a reference sensor and processing signals from one or more observed sensors utilizing the AGC signal. The reference sensor is located farther from the concealed conductor than the observed sensors. The AGC system can be implemented in analog form or can include a digital AGC determination in a microprocessor.
71 Citations
11 Claims
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1. A line locator for locating an elongated concealed conductor, comprising:
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at least one observed channel that provides an observed signal in response to an output signal from an observed sensor and an AGC signal; and a reference channel that generates the AGC signal in response to an output sensor from a reference sensor, the reference sensor being further from the elongated concealed conductor than the observed sensor of the at least one observed channel. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of processing output signals from a reference sensor and at least one observed sensor in a line locator wherein the reference sensor is located farther from an elongated concealed conductor than the at least one observed sensor, comprising:
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deriving an AGC signal from the output signal of the reference sensor; processing the output signals from the at least one observed sensor using the AGC signal to obtain a display signal; and displaying the display signal to an operator of the line locator. - View Dependent Claims (8, 9, 10, 11)
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Specification