Method and device for evaluating a parameter of a moving object
First Claim
1. A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter, in which, by means of a measurement device, from a first determined time, a series of at least three successive first time-spaced linear images are taken in a shot-direction, at a determined time interval, said series forming a first element, and at least, from a second determined time later than the first determined time, at least one second element selected from the group consisting of one single second linear image and a series of second linear images of the object in relative movement is taken, each second linear image being taken in a direction forming an angle with the shot-direction of the first image, each second linear image being spaced from the first linear images, in which (a) a first development of images in function of time made up of at least a first element and (b) a second development of image made up of at least a second element are formed, in which at least partially at least one linear image of the first development is compared with at least a part of a linear image of the second development to determine the part of time-spaced linear image of the first development which best corresponds to a part of a linear image of the second development and to determine at least one time-function parameter for which at least a part of the first time-spaced image of the said period best corresponds to a part of a second linear image.
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Abstract
A method for measuring a parameter of a movement of an object, in which a series of successive first time-spaced linear images and a second spaced linear image are taken, (a) a first development of first linear images and (b) a second development consisting of at least one second image are formed, and linear images of the first development are compared at least partly with at least a part of a linear image of the second development to determine the part of a spaced linear image of the first development which best corresponds to a part of a linear image of the second development.
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Citations
46 Claims
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1. A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter,
in which, by means of a measurement device, from a first determined time, a series of at least three successive first time-spaced linear images are taken in a shot-direction, at a determined time interval, said series forming a first element, and at least, from a second determined time later than the first determined time, at least one second element selected from the group consisting of one single second linear image and a series of second linear images of the object in relative movement is taken, each second linear image being taken in a direction forming an angle with the shot-direction of the first image, each second linear image being spaced from the first linear images, in which (a) a first development of images in function of time made up of at least a first element and (b) a second development of image made up of at least a second element are formed, in which at least partially at least one linear image of the first development is compared with at least a part of a linear image of the second development to determine the part of time-spaced linear image of the first development which best corresponds to a part of a linear image of the second development and to determine at least one time-function parameter for which at least a part of the first time-spaced image of the said period best corresponds to a part of a second linear image.
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3. A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter,
wherein by means of a measurement device, from a first determined time, a series of at least three successive first linear images are taken in a shot direction, at a determined time interval, and at least, from a second determined time later than the first determined time, a series of second linear images of the object in relative movement are taken, said second linear images being taken in a direction forming an angle with the shot-direction of the first images and being spaced from the first images, wherein (a) a first development of images in function of time consisting of at least a series of first linear images spaced in time taken from the first determined time and (b) a second development of images made up of a series of second spaced linear images taken at a determined time interval are formed, and wherein at least partially, at least one linear image of the first development is compared with at least a part of at least one linear image of the second development to determine the part of at least one time-spaced linear image of the first development which best corresponds to a part of one linear image of the second development and to determine at least one time gap for which at least a part of a first spaced linear image best corresponds to a part of a second linear image.
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14. A measurement device for establishing a method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter,
in which, by means of the measurement device, from a first determined time, a series of at least three successive first time-spaced linear images are taken in a shot-direction, at a determined time interval, said series forming a first element, and at least, from a second determined time later than the first determined time, at least one second element selected from the group consisting of one single second linear image, a series of second linear images of the object in relative movement is taken, each second linear image being taken in a direction forming an angle with the shot-direction of the first image, each second linear image being spaced from the first linear images, in which (a) a first development of images in function of time made up of at least a first element and (b) a second development of image made up of at least a second element are formed, in which at least partially at least one linear image of the first development is compared with at least a part of a linear image of the second development to determine the part of time-spaced linear image of the first development which best corresponds to a part of a linear image of the second development and to determine at least one time-function parameter for which at least a part of the first time-spaced image of the said period best corresponds to a part of a second linear image, said device including at least: -
a sensor set taking at least one first linear image by a first sensor means and at least one series of second linear images by a second sensor means, in particular taken at successive times, the said second linear images being taken from a different angle relative to the first linear image, a means generating a series of first images spaced in time, a comparison device receiving signals from the sensor set and from the means generating a series of first images spaced in time, this comparison device comparing, at least partially, the series of first spaced images with at least one second linear image and determining, for at least a part of the series of first spaced images a parameter selected from the group consisting of a factor of correspondence and a discrepancy of correspondence with at least a part of a second linear image, this comparison device being programmed for determining a time parameter corresponding to an optimum parameter selected from the group consisting of maximum of the factor of correspondence and minimum of discrepancy of correspondence between at least a part of a first linear image spaced in time and at least a part of a second linear image. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 39, 40, 41, 42, 43, 44, 45, 46)
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28. (new) A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter,
in which, by means of a measurement device, from a first determined time, a series of at least three successive first time-spaced linear images are taken in a shot-direction, at a determined time interval, said series forming a first element, and at least, from a second determined time later than the first determined time, at least one second element selected from the group consisting of one single second linear image and a series of second linear images of the object in relative movement is taken, each second linear image being taken in a direction forming an angle with the shot-direction of the first image, each second linear image being spaced from the first linear images, in which (a) a first development of images in function of time made up of at least a first element and (b) a second development of image made up of at least a second element are formed, in which at least partially linear images of the first development are compared with at least a part of linear images of the second development to determine the part of time-spaced linear images of the first development which best correspond to a part of linear images of the second development and to determine at least one time-function parameter for which at least a part of the first time-spaced images of the said period best corresponds to a part of second linear images.
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31. A method to characterise, at least partially, a movement of an object relative to a measurement device, this method determining at least one time-function parameter,
in which by means of a measurement device, from a first determined time, a series of at least three successive first linear images are taken in a shot direction, at a determined time interval, and at least, from a second determined time later than the first determined time, a series of second linear images of the object in relative movement are taken, said second linear images being taken in a direction forming an angle with the shot-direction of the first images and being spaced from the first images, in which (a) a first development of images in function of time consisting of at least a series of first linear images spaced in time taken from the first determined time and (b) a second development of images made up of a series of second spaced linear images taken at a determined time interval are formed, and in which at least partially, linear images of the first development are compared with at least a part of linear images of the second development to determine the part of time-spaced linear images of the first development which best corresponds to a part of linear images of the second development and to determine at least one time gap for which at least a part of a first spaced linear images best correspond to a part of second linear images.
Specification