A fully enabling disclosure of the present invention, including the best mode thereof to one of ordinary skill in the art, is set forth more particularly in the remainder of the specification, including reference to the accompanying drawings.
Reference will now be made in detail to the embodiments of the invention, one or more examples of which are set forth below. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment can be used on another embodiment to yield a still further embodiment. Thus, it is intended that the present invention cover such modifications and variations as come within the scope of the appended claims and their equivalents. Other objects, features, and aspects of the present invention are disclosed in the following detailed description. It is to be understood by one of ordinary skill in the art that the present discussion is a description of exemplary embodiments only and is not intended as limiting the broader aspects of the present invention, which broader aspects are embodied in the exemplary constructions.
In describing the various figures herein, the same reference numbers are used throughout to describe the same material, apparatus, or process pathway. To avoid redundancy, detailed descriptions of much of the apparatus once described in relation to a figure is not repeated in the descriptions of subsequent figures, although such apparatus or process is labeled with the same reference numbers.
As set forth in
As seen in reference to
Reel 30 also contains a spring motor mechanism for maintaining a length of cable in an approximately constant tension arrangement as the cable 32 is deployed. The nearly constant tension allows extension or retraction of the pole 20, or the direct downward deployment of the housing 40 when it is released from the pole 20. The reel is designed to release the cable when the pole is extended and also facilitates the removal of a housing 40, as best described below, from pole 20. The ability to remove the housing allows the apparatus 10 to be used as a drop-down sensor into a bore hole, or lowered vertically into a tank enclosure. Housing 40 is preferably sealed against moisture and liquids such that housing 40 may be immersed in liquids while still carrying out the video and radiation detection functions. Conventional seals between housing 40 and the interconnected cable 32 are used to maintain the integrity of housing 40.
As best seen in reference to
A terminal tip of telescopic pole 20 defines a housing 40 as best seen in reference to
A first camera 42, such as a miniature color video camera, Supercircuit's Model PC182 (Liberty Hill, Tex.) is positioned within the housing having a field of view which extends through the optically clear tip of housing 40. A second camera 43 is positioned behind camera 42, the field of view of camera 43 extending in an axial direction opposite that of camera 42. A mirror 46 is positioned at an approximate 40° angle and within the field of view of camera 43 such that camera 43 is able to view images along the exterior side of housing 40. The slight forward bias in the tilt of the field of view of camera 43 provides a field of view compatible with the view of the forward looking camera 42. A motor 48 is attached to mirror 46 and is used to rotate mirror 46 within housing 40. In this manner, camera 43 is able to visualize a 360° exterior view along the side of housing 40.
As seen in reference to
Some of the conductors of the cable 32 connects directly to the radiological sensor processing board 110 as shown in
As seen in reference to
The PDA 70 also provides data storage capability for the video and radiation detector data such that the stored information may be downloaded to a separate computer and/or analyzed in greater detail following data acquisition. As seen in reference to
The auditory output from PDA 70 includes a user selected menu of tones and alerts when radiation levels exceed a predetermined background level. In addition, the PDA 70 includes isotope identification software which identifies specific isotopes using human speech as set forth in U.S. Pat. No. 5,304,808, Method and Apparatus For Data Storage, and which is incorporated herein by reference.
The telescopic member 20, as best seen in reference to
As further set forth in
The remote camera and radiation monitor apparatus 10 provides a useful field instrument for visual inspection, monitoring, and detection of radiation sources. The extendable, telescopic member allows the probe to be placed into crevices and passageways that are otherwise inaccessible to a human operator. Further, the spring-loaded spool of cable within the reel allows the housing assembly to be removed from the tip of pole 20 and to be lowered to a depth of 50 feet within an interior of a tank, subsurface bore, or into the interior of a building or other structure.
The operator of apparatus 10 uses the PDA 70, headphones 80, and video monitor 90 to control and use the apparatus 10. The integrated software is a self-calibrating system which automatically establishes a background radiation level and provides for selectable alarm levels.
In an initial “search mode” the software generates a periodic tone indicating the system is in operation. As the operator attempts to locate radioactive sources, the frequency of the tone increases as the detector approaches a radioactive source. At a threshold level of detection, an alarm will sound for the operator at which point the software compares the radiation spectrum to a known library of isotopes. Upon achieving a match between known isotopes, the specific isotope may be displayed on the PDA screen as well as enunciated by a software speech protocol to the operator.
The construction of the housing with multiple cameras and rotatable mirror allows both forward and side views to be obtained relative to the tip housing. The video feed may be monitored by the operator on screen 90.
The operator can easily engage switches 34 located on reel 30, switches 34 controlling the power for the components including selection between camera views and rotation of the mirror of the side viewing camera.
Although preferred embodiments of the invention have been described using specific terms, devices, and methods, such description is for illustrative purposes only. The words used are words of description rather than of limitation. It is to be understood that changes and variations may be made by those of ordinary skill in the art without departing from the spirit or the scope of the present invention which is set forth in the following claims. In addition, it should be understood that aspects of the various embodiments may be interchanged, both in whole, or in part. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred versions contained therein.
This invention was made with Government support under Contract No. DE-AC0996-SR18500 awarded by the United States Department of Energy. The Government has certain rights in the invention.