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Defect-detection-system-with-quick-release-modules

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Defect detection system with quick-release modules

Details

Inventors: Little, James A.; Cavin, Dennis;
Assignee: Simco-Ramic Corp. (Medford, OR)
Primary Examiner: Nelms; David C.
Assistant Examiner:
Attorney, Agent or Firm: Flehr, Hohbach, Test, Albritton & Herbert

A defect detection system is especially applicable to string type potatoes for removing the black spots and includes removing or sorting out potatoes with black spots. It includes a pair of line scanning cameras focused on opposite sides of a vertical on a common line, spaced above the conveyor belt to the height of the potato. Such opposite sight lines provide for effective sensing of leading or trailing edges of the potato. To provide for effective cutting, the cutting blade units have offset blades to allow overlap and a spacing so that areas of uncertainty created by the two cameras are eliminated. To minimize down-time of the system, the vision, light, power and punch modules are separately removable. Moreover, they are located on a cantilevered base above the moving belt. This cantilevering in conjunction with pivoted supports allows for a seamless belt and easy removal of that belt. Finally, off the shelf air piston drives are utilized, their rebound characteristics being optimized by the tailoring actuating pulses to match the specific rebound characteristics.

DETAILED DESCRIPTION Thus, it is an object of the present invention to provide an improved defect detection system.
In accordance with the above object, there is provided a defect detection system for sensing defects in discrete pieces of similar product being carried on a conveyor belt, including a mounting base supported over the conveyor belt and removably carrying the following three modules.
A light module is underslung from the base for illuminating the product.
A vision module is placed on the base with camera means for sensing reflections of the illumination by the product to thereby sense defects.
A power module is placed on the base for supplying power to the vision module.
Quick release means are connected individually to each of the modules for respectively connecting the modules to the base and for allowing easy removal of any individual module.

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