Hot melt adhesive detection methods
AssigneeIllinois Tool Works Inc.
InventorsDieter B. Heerdt, Paul M. Jenkins
Life of this patent
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Abstract
A hot melt adhesive sensing system and methods including detecting (410) multiple areas of a target, for example a hot adhesive material, by sensing changes in temperature with a corresponding number of thermal sensors, summing (420) an output of the thermal sensors, and evaluating (430) the summed output by comparing the summed output with a variable reference, the results of which may be assessed relative to a specified tolerance.
Claims9
A method in a hot melt adhesive detection system, comprising:
- detecting a hot melt adhesive material with a thermal sensor;
- generating an output signal related to the hot melt adhesive detected by the thermal sensor;
- evaluating the output signal by comparing the output signal with a threshold that is proportionately less than a reference heat profile.
A method in thermal sensing system, the method comprising:
- detecting heat from a reference target material;
- producing an output signal related to the heat detected from the reference target material;
- sampling the output signal;
- producing a reference heat threshold by proportionately reducing the samplings of the output signal.
A method in a thermal detection system, comprising:
- detecting heat from a target material with a thermal sensor, the target material disposed on a product;
- generating an output signal related to the heat detected;
- evaluating the output signal by comparing the output signal with a variable threshold;
- comparing a period during which the output signals are generated with a period during which the product is detected.
A method in a thermal detection system, comprising:
- detecting heat from a target material with a thermal sensor,
- generating a plurality of output signals related to heat detected from different locations of the target material;
- summing the plurality of output signals;
- sampling the summed output signals;
- comparing the sampled output signals with a variable threshold;
- and
- evaluating the comparison of the sampled output signals relative to a predefined tolerance.
Dependencies are inferred from the claim text.