Method and device for detecting impurities in a longitudinally moving thread-like product
First Claim
1. A method for detecting impurities in a longitudinally moving thread-like product made of textile fibers, comprising the following steps:
- detecting a first parameter on the product in a wave field, and generating a first signal indicating potentially present impurities;
detecting a further parameter on the product in a field, and generating a second signal indicating potentially present impurities;
allocating separate evaluation specifications to the first signal and second signal for the evaluation thereof; and
identifying a class of impurities containing a specific type of impurity from the evaluated first and second signals.
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Abstract
A first parameter is detected on a fast moving strip or yarn with a wave field, and a first signal indicating potentially present contaminants or impurities is generated. This first parameter preferably detects reflection properties that can be detected on the surface of the product. A further parameter is detected on the strip or yarn in a field, and a second signal is generated which also indicates contaminants or impurities. This second parameter preferably detects properties such as mass or diameter of the yarn or strip. Evaluations of the first signal and the second signal that occur at the same location on the product are considered together, and labeled to indicate the specific type of impurity or contaminant that they represent. Using empirical analysis, evaluation specifications can be selected to identify a group of impurities which are most likely to include a specific impurity of interest, e.g. non-vegetable contaminants.
23 Citations
17 Claims
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1. A method for detecting impurities in a longitudinally moving thread-like product made of textile fibers, comprising the following steps:
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detecting a first parameter on the product in a wave field, and generating a first signal indicating potentially present impurities;
detecting a further parameter on the product in a field, and generating a second signal indicating potentially present impurities;
allocating separate evaluation specifications to the first signal and second signal for the evaluation thereof; and
identifying a class of impurities containing a specific type of impurity from the evaluated first and second signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. A device for detecting impurities in a longitudinally moving thread-like products, comprising a first sensor operating with a wave field, a second sensor operating with a field, a processor connected to the first sensor and the second sensor, a memory for time-limited storage of signals from the first sensor and the second sensor, and a software program for the processor that contains evaluation specifications for the first and second signals and generates a third signal from the first signal and the second signal that indicates a class of impurities in the product containing a specific type of impurity.
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11. A method for classifying impurities in a longitudinally moving thread-like product made of textile fibers, comprising the following steps:
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detecting a first parameter on the product in a wave field, and generating a first signal indicating potentially present impurities;
detecting a further parameter on the product in a field, and generating a second signal indicating potentially present impurities;
recording two-dimensional data points respectively corresponding to instances where at least one of said first and second signals indicates a potentially present impurity, where said dimensions respectively correspond to said parameters;
labeling data points which are associated with at least one predetermined type of impurity; and
establishing a limit which identifies a class of impurities in which impurities of said predetermined type are primarily contained. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification