Method and apparatus for detecting embedded rebar within an interaction region of a structure irradiated with laser light
First Claim
1. A detection system for use during drilling by irradiation of an interaction region of a structure with laser light, the structure comprising a first material and a reinforcing member embedded in the first material, the detection system comprising:
- a focusing lens positioned to receive light emitted from the interaction region during drilling of the structure, the interaction region comprising a surface of the reinforcing member;
an optical fiber optically coupled to the focusing lens to receive light from the focusing lens; and
a spectrometer optically coupled to the optical fiber to receive light from the optical fiber, the spectrometer adapted for analysis of the light for indications of the reinforcing member within the interaction region, wherein the detection system is adapted to initiate cessation of drilling upon detecting the indications of the reinforcing member within the interaction region.
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Abstract
A detection system is used during irradiation of an interaction region of a structure with laser light. The structure includes embedded material. The detection system includes a focusing lens positioned to receive light emitted from the interaction region. The detection system further includes an optical fiber optically coupled to the focusing lens to receive light from the focusing lens. The detection system further includes a spectrometer optically coupled to the optical fiber to receive light from the optical fiber. The spectrometer is adapted for analysis of the light for indications of the embedded material within the interaction region.
104 Citations
18 Claims
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1. A detection system for use during drilling by irradiation of an interaction region of a structure with laser light, the structure comprising a first material and a reinforcing member embedded in the first material, the detection system comprising:
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a focusing lens positioned to receive light emitted from the interaction region during drilling of the structure, the interaction region comprising a surface of the reinforcing member; an optical fiber optically coupled to the focusing lens to receive light from the focusing lens; and a spectrometer optically coupled to the optical fiber to receive light from the optical fiber, the spectrometer adapted for analysis of the light for indications of the reinforcing member within the interaction region, wherein the detection system is adapted to initiate cessation of drilling upon detecting the indications of the reinforcing member within the interaction region. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detection system for use during irradiation of an interaction region of a structure with laser light, the structure comprising embedded material, the detection system comprising:
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a focusing lens positioned to receive light emitted from the interaction region; an optical fiber optically coupled to the focusing lens to receive light from the focusing lens; and a spectrometer optically coupled to the optical fiber to receive light from the optical fiber, the spectrometer adapted for analysis of the light for indications of the embedded material within the interaction region, wherein the structure comprises concrete and the embedded material comprises rebar, and the spectrometer is adapted to analyze light having wavelengths of approximately 592 nanometers for indications of rebar within the interaction region. - View Dependent Claims (9, 10)
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11. A detection system for use during drilling by irradiation of an interaction region of a structure with laser light, the structure comprising a first material and a reinforcing member embedded in the first material, the detection system comprising:
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means for focusing light emitted from the interaction region during drilling of the structure, the interaction region comprising a surface of the reinforcing member; means for separating the focused light into a spectrum of wavelengths; and means for analyzing at least a portion of the spectrum for indications of the reinforcing member within the interaction region, wherein the detection system is adapted to initiate cessation of drilling upon detecting the indications of the reinforcing member within the interaction region. - View Dependent Claims (13, 14, 15, 16)
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12. A method of detecting a reinforcing member within a laser-irradiated interaction region of a structure comprising a first material and the reinforcing member embedded in the first material, the method comprising:
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focusing light from the interaction region during drilling by laser irradiation of the structure, the interaction region comprising the reinforcing member, and the light including light from a surface of the reinforcing member, the surface exposed during drilling; separating the light into a spectrum of wavelengths; analyzing at least a portion of the spectrum for indications of the reinforcing member within the interaction region; and selectively adjusting the drilling in response to the indications, thereby avoiding substantially damaging the reinforcing member. - View Dependent Claims (17, 18)
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Specification