Patent ID: 8131483

Claim:
A computing device-implemented method for a yarn entanglement strength tester that includes a first roll, a second roll, a third roll, and a camera, the method comprising: executing, by the computer device, a particular number of test runs on a yarn, the yarn including an initial quantity of entanglements, where executing each test run of the particular number of test runs includes: setting, by the computing device, a test run number to a first value, determining, by the computing device, a first roll speed for the first roll based on an elongation level specified for the test run number, determining, by the computing device, a second roll speed for the second roll based on the elongation level specified for the test run number, determining, by the computing device, a third roll speed for the third roll based on the second roll speed, causing, by the computing device, the first roll to operate at the first roll speed and the second roll to operate at the second roll speed to apply the elongation level specified for the test run number on a portion of the yarn provided between the first roll and the second roll, causing, by the computing device, the third roll to operate at the third roll speed to apply a constant elongation level on a portion of the yarn provided between the second roll and the third roll, receiving, by the computing device, a tension measurement of the portion of the yarn provided between the first roll and the second roll in response to causing the first roll to operate at the first roll speed and the second roll to operate at the second roll speed, calculating a draw ratio based on the tension measurement, receiving, by the computing device and from the camera, diameter measurement information associated with the portion of the yarn provided between the second roll and the third roll, analyzing, by the computing device, the diameter measurement information to determine entanglement measurement information associated with the yarn for the test run number, incrementing, by the computing device, the test run number to obtain an incremented test run number, based on analyzing the diameter measurement information, determining, by the computing device, whether the incremented test run number is greater than the particular number, and executing, by the computing device and when the incremented test run number is less than or equal to the particular number, another test run of the particular number of test runs; and determining, by the computing device and when the incremented test run number is greater than the particular number, a final entanglement strength of the yarn based on the entanglement measurement information and the calculated draw ratios.