Buried service detection
First Claim
1. A mobile detection device as a bucket of an earth moving machine for an evaluation of a distance value and/or proximity from the bucket to an occluded AC carrying structure by detecting a magnetic field emanated from the AC of the AC carrying structure, comprising:
- at least one detection coil, comprising at least one winding of an electrically conductive material, connected toa first amplification stage connected to the coil,wherein the at least one detection coil and the first amplification stage are sealed within a common enclosure which is located at the bucket,wherein the first amplification stage is an amplifier circuit embodied as an electrical current sensing amplifier embodied as a transimpedance amplifier having a low input impedance, andwherein an output of the amplifier circuit is configured to link to an electronic signal evaluation unit for detecting the occluded structure according to an electrical signal induced in the detection coil by the magnetic field.
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Accused Products
Abstract
Some embodiments of the invention relate to a mobile detection device embodied as a bucket of an earth moving machine for an evaluation of a distance value and/or proximity from the bucket to an occluded AC-current carrying structure according to the magnetic field emanated from the structures AC-current. There is at least one detection coil, comprising at least one winding of an electrically conductive material, which is connected to a first amplification stage, with an amplifier circuit embodied as a current sensing amplifier, which are both are sealed within a common enclosure that is located at the bucket. An output of the amplifier circuit is configured to be linked to an electronic signal evaluation unit for detecting the occluded structure according to an electrical signal induced in the detection coil by the magnetic field.
23 Citations
21 Claims
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1. A mobile detection device as a bucket of an earth moving machine for an evaluation of a distance value and/or proximity from the bucket to an occluded AC carrying structure by detecting a magnetic field emanated from the AC of the AC carrying structure, comprising:
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at least one detection coil, comprising at least one winding of an electrically conductive material, connected to a first amplification stage connected to the coil, wherein the at least one detection coil and the first amplification stage are sealed within a common enclosure which is located at the bucket, wherein the first amplification stage is an amplifier circuit embodied as an electrical current sensing amplifier embodied as a transimpedance amplifier having a low input impedance, and wherein an output of the amplifier circuit is configured to link to an electronic signal evaluation unit for detecting the occluded structure according to an electrical signal induced in the detection coil by the magnetic field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A location method for locating occluded AC carrying underground structures at a construction site during earth moving, the method comprising:
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providing a mobile detection device embodied as a bucket of an earth moving machine, wherein the bucket comprises at least one detection coil that is connected to a first amplification stage, with an amplifier circuit embodied as an electrical current sensing amplifier embodied as a transimpedance amplifier having a low input impedance, and wherein the at least one detection coil and the connected first amplification stage are sealed within a common enclosure that is located at the bucket, detecting the underground structure according to an electrical signal induced in the at least one detection coil by a magnetic field emanated from the AC of the under ground structure, amplifying an output of the at least one detection coil in current mode by the current mode amplifier which is providing low input impedance to the at least one detection coil, and evaluating a proximity and/or a distance value from the bucket to the occluded AC carrying structure according to an electrical signal of the output of the current mode amplifier by means of an electronic signal evaluation unit. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification