IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0882466
(2010-09-15)
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등록번호 |
US-8196516
(2012-06-12)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
21 |
초록
▼
A sensor head-transporting roller carriage has four pairs of wheels acting around pivot points at the four corners of the carriage, which is advanced along tracks that are supported by vertical structures. The lateral wheel spacing is chosen in correlation with the track support interval distances s
A sensor head-transporting roller carriage has four pairs of wheels acting around pivot points at the four corners of the carriage, which is advanced along tracks that are supported by vertical structures. The lateral wheel spacing is chosen in correlation with the track support interval distances such that the vertical travel of all the wheels together is averaged, to be zero. As a result, variations in displacement alignment of the sensor are minimized. In addition, the pivot mechanism results in a fifty percent reduction in the effect of random vertical deflections caused by track debris or wheel concentricity etc. versus standard non-pivoting wheel sets. The roller carriage moves the sensor head along the cross direction to monitoring physical characteristics of a web of material that is moving in the machine direction.
대표청구항
▼
1. A transport carriage that comprises: a frame having a longitudinal axis, an upper surface, a lower surface, a front end and a rear end wherein the frame defines a center portion that rigidly secures a load;a first pair of wheels which are secured to a first rigid member that is pivotally mounted
1. A transport carriage that comprises: a frame having a longitudinal axis, an upper surface, a lower surface, a front end and a rear end wherein the frame defines a center portion that rigidly secures a load;a first pair of wheels which are secured to a first rigid member that is pivotally mounted to the frame such that the first pair of wheels, which comprise a first wheel and a second wheel, are located on a first opposing side of the frame toward the front end wherein the first rigid member has a pivot point in the middle as to allow for upward vertical motion of the first wheel and for simultaneous reciprocating downward vertical motion of the second wheel;a second pair of wheels which are secured to a second rigid member that is pivotally mounted to the frame such that the second pair of wheels, which comprise a third wheel and a fourth wheel, are located on a second opposing side of the frame toward the front end wherein the second rigid member has a pivot point in the middle as to allow for upward vertical motion of the third wheel and for simultaneous reciprocating downward vertical motion of the fourth wheel;a third pair of wheels which are secured to a third rigid member that is pivotally mounted to the frame such that the third pair of wheels, which comprise a fifth wheel and a six wheel, are located on the first opposing side of the frame toward the rear end wherein the third rigid member has a pivot point in the middle as to allow for upward vertical motion of the fifth wheel and for simultaneous reciprocating downward vertical motion of the sixth wheel; anda fourth pair of wheels which are secured to a fourth rigid member that is pivotally mounted to the frame such that the fourth pair of wheels, which comprise a seventh wheel and an eighth wheel, are located on the second opposing side of the frame toward the rear end wherein the fourth rigid member has a pivot point in the middle as to allow for upward vertical motion of the seventh wheel and for simultaneous reciprocating downward vertical motion of the eighth wheel wherein the first pair of wheels is transversely mounted on the frame relative the second pair of wheels and wherein the third pair of wheels is transversely mounted on the frame relative to the fourth pair of wheels so that the first, second, fifth and sixth wheels are positioned in tandem with the separation between adjacent wheels being the same and the third, fourth, seventh and eighth wheels are positioned in tandem with the separation between adjacent wheels being the same and wherein all the wheels have the same diameter such that, as the transport carriages is driven, the vertical travel of all the wheels together averages to zero so that the frame moves along a smooth linear horizontal path. 2. A scanning system for a mobile sensor device that is driven between a first end and a second end along a main scanning direction wherein the mobile sensor device is rigidly secured to a roller carriage assembly that is transported on track means that extends along a first direction that is parallel to the main scanning direction wherein the mobile sensor device is operative to measure properties of a moving sheet product, wherein the track means is suspended and sags along intervals in the first direction and whereinthe roller carriage assembly comprises: (i) a frame having a longitudinal axis, an upper surface, a lower surface, a front end and a rear end wherein the mobile sensor device is rigidly mounted to the frame;(ii) a first pair of wheels that engage the track means and that are secured to a first rigid member that is pivotally mounted to the frame such that the first pair of wheels, which comprise a first wheel and a second wheel, are located on a first opposing side of the frame toward the front end wherein the first rigid member has a pivot point in the middle as to allow for upward vertical motion of the first wheel and for simultaneous reciprocating downward vertical motion of the second wheel;(iii) a second pair of wheels that engage the track means and that are secured to a second rigid member that is pivotally mounted to the frame such that the second pair of wheels, which comprise a third wheel and a fourth wheel, are located on a second opposing side of the frame toward the front end wherein the second rigid member has a pivot point in the middle as to allow for upward vertical motion of the third wheel and for simultaneous reciprocating downward vertical motion of the fourth wheel;(iv) a third pair of wheels that engage the track means and that are secured to a third rigid member that is pivotally mounted to the frame such that the third pair of wheels, which comprise a fifth wheel and a six wheel, are located on the first opposing side of the frame toward the rear end wherein the third rigid member has a pivot point in the middle as to allow for upward vertical motion of the fifth wheel and for simultaneous reciprocating downward vertical motion of the sixth wheel; and(v) a fourth pair of wheels that engage the track means and that are secured to a fourth rigid member that is pivotally mounted to the frame such that the fourth pair of wheels, which comprise a seventh wheel and an eighth wheel, are located on the second opposing side of the frame toward the rear end wherein the fourth rigid member has a pivot point in the middle as to allow for upward vertical motion of the seventh wheel and for simultaneous reciprocating downward vertical motion of the eighth wheel wherein the first pair of wheels is transversely mounted on the frame relative the second pair of wheels and wherein the third pair of wheels is transversely mounted on the frame relative to the fourth pair of wheels so that the first, second, fifth and sixth wheels are positioned in tandem with the separation between adjacent wheels being the same and the third, fourth, seventh and eighth wheels are positioned in tandem with the separation between adjacent wheels being the same and wherein all the wheels have the same diameter such that, as the mobile sensor device is driven back and forth between the first end and the second end, the vertical travel of all the wheels together averages to zero so that the frame moves along a smooth linear horizontal path. 3. The scanning system of claim 2 wherein the track means comprises (i) a first elongated member that extends along the first direction and the first pair of wheels and the third pair of wheels engage the first elongated member and (ii) a second elongated member extends along the first and that is transversely spaced apart from the first elongated member and the second pair of wheels and the fourth pair of wheels engage the second elongated member. 4. The scanning system of claim 3 wherein the frame defines a center portion that supports the mobile device. 5. The scanning system of claim 2 wherein, for each pair of wheels, each wheel pivots upwardly upon encountering a bump or obstruction along the track means and pivots downwardly upon encountering a depression or drop along the track means. 6. The scanning system of claim 2 wherein the track means is supported by a plurality of vertical beam structures that are spaced laterally apart at equal-distances of d along the length of the first direction and wherein the distance between adjacent wheels is equal to (n×d)+d/2 where n is equal to 0, 1, 2, . . . . 7. The scanning system of claim 2 wherein for each pair of wheels the upward vertical motion of one of the wheels has a first fixed range and the downward vertical motion of the other wheel has a second fixed range which is equal to that of the first. 8. A method of moving a mobile scanning sensor device, which is operative to measure properties of a moving sheet product, back and forth along a main scanning path on a track means that extends along a first direction that is parallel to the main scanning direction so as to reduce vertical misalignment of the scanning sensor device profile, which comprises the steps of: (a) providing a roller carriage assembly that comprises: (i) a frame having a longitudinal axis, an upper surface, a lower surface, a front end and a rear end wherein the mobile scanning sensor device is rigidly mounted to the frame;(ii) a first pair of wheels that engage the track means, that is suspended and sags along intervals in the first direction, and that are secured to a first rigid member that is pivotally mounted to the frame such that the first pair of wheels, which comprise a first wheel and a second wheel, are located on a first opposing side of the frame toward the front end wherein the first rigid member has a pivot point in the middle as to allow for upward vertical motion of the first wheel and for simultaneous reciprocating downward vertical motion of the second wheel;(iii) a second pair of wheels that engage the track means and that are secured to a second rigid member that is pivotally mounted to the frame such that the second pair of wheels, which comprise a third wheel and a fourth wheel, are located on a second opposing side of the frame toward the front end wherein the second rigid member has a pivot point in the middle as to allow for upward vertical motion of the third wheel and for simultaneous reciprocating downward vertical motion of the fourth wheel;(iv) a third pair of wheels that engage the track means and that are secured to a third rigid member that is pivotally mounted to the frame such that the third pair of wheels, which comprise a fifth wheel and a six wheel, are located on the first opposing side of the frame toward the rear end wherein the third rigid member has a pivot point in the middle as to allow for upward vertical motion of the fifth wheel and for simultaneous reciprocating downward vertical motion of the sixth wheel; and(v) a fourth pair of wheels that engage the track means and that are secured to a fourth rigid member that is pivotally mounted to the frame such that the fourth pair of wheels, which comprise a seventh wheel and an eighth wheel, are located on the second opposing side of the frame toward the rear end wherein the fourth rigid member has a pivot point in the middle as to allow for upward vertical motion of the seventh wheel and for simultaneous reciprocating downward vertical motion of the eighth wheel wherein the first pair of wheels is transversely mounted on the frame relative the second pair of wheels and wherein the third pair of wheels is transversely mounted on the frame relative to the fourth pair of wheels so that the first, second, fifth and sixth wheels are positioned in tandem with the separation between adjacent wheels being the same and the third, fourth, seventh and eighth wheels are positioned in tandem with the separation between adjacent wheels being the same and wherein all the wheels have the same diameter; and(b) driving the roller carriage assembly back and forth along the main scanning path such that the vertical travel of all the wheels together averages to zero so that the frame moves along a smooth linear horizontal path. 9. The method of claim 8 wherein for each pair of wheels the upward vertical motion of one of the wheels has a first fixed range and the downward vertical motion of the other wheel has a second fixed range which is equal to that of the first. 10. The method of claim 8 wherein each wheel pivots upwardly upon encountering a bump or obstruction along the track means and pivots downwardly upon encountering a depression or drop along the track means. 11. The method of claim 8 wherein the track means is supported by a plurality of vertical beam structures that are spaced laterally apart at equal-distances of d along the length of the first direction and wherein the distance between adjacent wheels is equal to (n×d)+d/2 where n is equal to 0, 1, 2, . . . . 12. The method of claim 11 wherein the track means defines an elongated track surface and the vertical beam structures cause the track surface to exhibit a vertical deflection pattern. 13. The method of claim 12 wherein the vertical deflection pattern is characterized as a sinusoidal deflection pattern.
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