Tire testing device having an intelligent test head
First Claim
1. A tire testing device comprising:
- an air pressure means for changing the tire pressure of a wheel,a test head and a computer, which prior to and after a change in the air pressure respectively with coherent radiation produce an interferogram of the tire surface from which the information about defects present in the tire is obtained,a positioning means for the test head, with which the test head is to be positioned for producing interferograms at a predetermined distance from the tire, and a control means in order to incrementally rotate the wheel by an amount equal to a test segment, when the examination of the preceding test segment is completed, wherein(a) an optical means for producing the interferograms, an electronic control means for the optical means and the air pressure control means are collected together in the test head, wherein(b) the test head comprises a CPU which is provided for the electronic control of the optical means and the air pressure control means and is connected via an interface with the computer, wherein(c) a system bus is provided for connecting the electronic units of the test head, and wherein(d) a sequence control means for the tire testing device and means for evaluating the interferogram are provided in the computer.
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Accused Products
Abstract
A tire testing device comprising an air pressure control means for changing the tire pressure of a wheel, a test head and a computer, which prior to and after a change in the air pressure produce an interferogram of the tire surface and convert the interferogram into a modulo-2π image, which for its part is processed to yield a gray value image, and in which from a comparison of the gray value images information about defects present in the tire is obtained, a positioning means for the test head, with which the test head is to be positioned for producing interferograms at a predetermined distance from the tire, and a control means in order to incrementally rotate the wheel by an amount equal to a test segment, when the examination of the preceding test segment is completed, wherein an optical means for producing the interferograms, an electronic control means for the optical means and the air pressure control means are collected together in the test head and in that a sequence control means for the tire checking apparatus and means for evaluating the interferogram are provided in the computer.
25 Citations
17 Claims
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1. A tire testing device comprising:
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an air pressure means for changing the tire pressure of a wheel, a test head and a computer, which prior to and after a change in the air pressure respectively with coherent radiation produce an interferogram of the tire surface from which the information about defects present in the tire is obtained, a positioning means for the test head, with which the test head is to be positioned for producing interferograms at a predetermined distance from the tire, and a control means in order to incrementally rotate the wheel by an amount equal to a test segment, when the examination of the preceding test segment is completed, wherein (a) an optical means for producing the interferograms, an electronic control means for the optical means and the air pressure control means are collected together in the test head, wherein (b) the test head comprises a CPU which is provided for the electronic control of the optical means and the air pressure control means and is connected via an interface with the computer, wherein (c) a system bus is provided for connecting the electronic units of the test head, and wherein (d) a sequence control means for the tire testing device and means for evaluating the interferogram are provided in the computer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification