Slide Axis
2009
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 6 Z AXIS LINEAR SLIDE actuator CNC ROUTER PLASMA LASER $256.00 Time Remaining: 6d 1h 34m Buy It Now for only: $256.00 |
 16 PARKER Z AXIS SLIDE CNC ROUTER STEPPER SERVO NSK SKF PLASMA LASER $40.00 (1 Bid) Time Remaining: 3d 10h 34m |
 THK Ball Slide RSR15WN Wide CNC Z Axis $30.00 Time Remaining: 11d 4h 7m Buy It Now for only: $30.00 |
 THK SRS20M CNC Z Axis Ball Slide NEW $30.00 Time Remaining: 11d 4h 11m Buy It Now for only: $30.00 |
 2 x used THK SR15 LM Guide Linear Bearing Slide Rail for CNC Milling Axis $89.00 Time Remaining: 26d 20h 18m Buy It Now for only: $89.00 |
 Precision X Y Axis Slide Table 25mm x 25mm Movement $14.95 Time Remaining: 10d 5h 39m Buy It Now for only: $14.95 |
 3 x THK SRS 9WM LM Guide Linear Bearing Slide Rail for Automation Axis $39.00 Time Remaining: 27d 23h 12m Buy It Now for only: $39.00 |
 Star 2 Axis CNC Slide w Linear Ways w Ball Screws 1460 307 21 Used WARRANTY $600.00 Time Remaining: 19d 2h 2m Buy It Now for only: $600.00 |
 1 x Pair of used THK HSR 10 RM Linear Bearing Slide Rail LM Guide for CNC Axis $59.00 Time Remaining: 26d 15h 47m Buy It Now for only: $59.00 |
 2x OZK L 20 Linear Slide Rail for Hobby CNC Router Axis $59.00 Time Remaining: 6d 22h 33m Buy It Now for only: $59.00 |
 Parker Daedal Dual Axis Ballscrew Linear Slide Stages Compumotor Renishaw RGH24 $999.99 Time Remaining: 13d 11h 52m Buy It Now for only: $999.99 |
 Generic Single Axis Linear Slide Actuator 4 Travel $148.74 Time Remaining: 9d 6h 48m Buy It Now for only: $148.74 |
 Linear Block Slide for Robot Automation Axis $24.99 Time Remaining: 24d 17h 37m Buy It Now for only: $24.99 |
 Generic Single Axis Linear Slide Actuator 5 Travel NR $169.99 Time Remaining: 9d 5h 19m Buy It Now for only: $169.99 |
 MICRO SLIDES ANORAD SINGLE AXIS LINEAR SLIDE A 6082 11 $99.99 Time Remaining: 10d 9h 18m Buy It Now for only: $99.99 |
 PARKER POSITIONING SYSTEMS FOUR AXIS POSITIONING SLIDE $1,100.00 Time Remaining: 27d 3h 40m Buy It Now for only: $1,100.00 |
 Micromatic 3 Axis Linear Actuator Stage XYZ Nutec Slide Ball Screw $1,099.99 Time Remaining: 8d 10h 36m Buy It Now for only: $1,099.99 |
 4x NB SME 16GUU Linear Bearing Block Slide for CNC axis $32.99 Time Remaining: 1d 23h 20m Buy It Now for only: $32.99 |
 MICRO SLIDES ANORAD SINGLE AXIS LINEAR SLIDE A 6082 11 $99.99 Time Remaining: 10d 9h 16m Buy It Now for only: $99.99 |
 NEW 2 Axis linear slide rail assembly 92 x 40 $1,600.00 Time Remaining: 15d 10h 6m Buy It Now for only: $1,600.00 |
 Generic Single Axis Linear Slide Actuator 35 Travel $127.49 Time Remaining: 9d 5h 16m Buy It Now for only: $127.49 |
 PARKER POSITIONING SYSTEMS THREE AXIS POSITIONING SLIDE $875.00 Time Remaining: 27d 3h 32m Buy It Now for only: $875.00 |
 PARKER POSITIONING SYSTEM SINGLE AXIS POSITIONING SLIDE $230.00 Time Remaining: 27d 3h 38m Buy It Now for only: $230.00 |
 PARKER POSITIONING SYSTEMS DUAL AXIS POSITIONING SLIDE $450.00 Time Remaining: 27d 3h 34m Buy It Now for only: $450.00 |
 PARKER POSITIONING SYSTEMS SINGLE AXIS SLIDE W SERVO $230.00 Time Remaining: 27d 3h 36m Buy It Now for only: $230.00 |
 THK linear Axis Slide for CNC router project or motion control $45.00 Time Remaining: 22d 23h 27m Buy It Now for only: $45.00 |
 PHD linear slide pneumatic cylinder 1 1 2 X 120 1 1 2 X 20 2 axis Turck $875.00 Time Remaining: 8h 15m Buy It Now for only: $875.00 |
Slide Axis
Safety bus seats
. An improved passenger safety restraint for vehicles having a column of at least two bus seats, each said seat defined by a frame, and each pair of said bus seats having a front seat and a rear seat, said vehicles configured to travel along a geometric plane, the safety restraint comprising: a restraint bar defined by opposing ends having a hinge assembly attached at each said end, each said assembly comprising a shaft adapted to be pivotally attached to said front seat to pivot about a fixed axis, whereby said fixed axis of rotation prevents said bar from engaging in a sliding motion; sensing means for sensing acceleration to the vehicle along the vehicle's driving plane; and locking means for preventing said shaft from rotating, said locking means responsive to said sensing means.
A safety restraint for buses having columns of bus seats, comprising: a U-shaped restraint bar defining a center section and two ends extending perpendicularly therefrom; a pair of hinge assemblies adapted to be attached to one said seat, each said assembly further including a shaft defined by a shaft axis attached at one said end, said shaft configured to permit said restraint bar to rotate about said shaft axis on a fixed rotation axis, said axis of rotation being spacially fixed, thereby confining said restraint bar from undergoing a sliding motion; and a locking mechanism for locking the rotation of said shafts in response to sufficient acceleration or tilting.
. A safety restraint system for bench bus seats, said bus seats comprising seatbacks and said bus seats being aligned in at least one column, comprising: a pivotal restraint bar, said bar pivoting about a pair of attached hinge assembles defined by shaft axes, said hinge assemblies configured to permit said bar to pivot about a fixed axis while preventing said bar from sliding; and a locking means, cooperating with said hinge assemblies responding to lateral acceleration and tilting for locking said pivotal motion.
. The safety restraint of claim 12, wherein each said hinge assembly further comprises a pendulum assembly, each said pendulum assembly being configured to lock said rotation when forces incident upon said bus seats exceed predetermined settings.
About the Author
An improved passenger safety restraint for vehicles having a column of at least two bus seats, each said seat defined by a frame, and each pair of said bus seats having a front seat and a rear seat, said vehicles configured to travel along a geometric plane,
Calculating velocity given 6-axis accelerometer data?
I have accelerometer data being passed to my program, what I want to do is calculate a velocity change. For instance if my accelerometer is laying flat on the table and I was to slide it forward, I want to recognize that velocity change. Currently I was given this formula but was never explained so I'm looking for clarification. The formula requires a getRotationMatrix call to figure orientation in world reference (http://developer.android.com/reference/android/hardware/SensorManager.html#getRotationMatrix(float[], float[], float[], float[])) then takes each accelerometer reading and multiples by each value in the row, the summation of those values is the acceleration.
X = (R_M[0]*acc[0] + R_M[1]*acc[1] + R_M[2]*acc[2]);
Y = (R_M[3]*acc[0] + R_M[4]*acc[1] + R_M[5]*acc[2]);
Z = (R_M[6]*acc[0] + R_M[7]*acc[1] + R_M[8]*acc[2]);
Can someone explain this?
If you have two coordinate systems which are rotated with respect to each other, you can transform from one to the other with a rotation matrix. That is, given a vector in one coordinate system, the rotation matrix tells me its coordinates in the other coordinate system.
This is doing the matrix product A = R*a where a = your acceleration vector, as measured in your accelerometer's coordinate system, into an acceleration vector A in some other coordinate system (presumably the one you want).
So X, Y and Z are the components of acceleration in your reference frame.
GEDC0059 arm video noise + torsion in slide axis
