Presentation on theme: "Zeno Hardware Technical Specifications 16 levels of dynamic pressure"— Presentation transcript:
1 PKMAS and Zeno Walkway System ProtoKinetics LLC Michael Rowling Kristen Larsen www.protokinetics.com
2 Zeno Hardware Technical Specifications 16 levels of dynamic pressure 0.4’’ square sensors on 0.5’’ centers over sensing arrayDual control sensing elements avert false firingThree Layer Walkway (0.5’’ height)Base Layer:-Flexible linoleum with sloped rubber edging facilitatessmooth transitions onto walkwayMiddle Layer:-Protects sensing technology and circuitry-Reduces curling of the edgesTop Cover:-Carpet or flexible linoleum with a variety of patterns-Velcro edge lining secures layersCustomization: match your lab and research needsTop cover PatternSize8’12’14’16’20’26’2’x4’
3 Zeno Walkway Setup The 2x16 Zeno mat ships in two boxes. To setup, first roll out the base layer. Then, roll the sensing carpet out with its circuitry fitting into the base. Complete the walkway by securing the top cover in place with its Velcro edges.To record a walk, use the Zeno box to connect the walkway to the USB port of the computer with PKMAS software installed.
4 Powered by PKMAS Software Data collection, processing, and analysis software for:Zeno WalkwayGAITRite platinum seriesEncryption key for data securityMultiple pass trialsMinimum volume ellipse bounded footprints114 primary and computed gait parametersCOP, COMe, step/stride length, foot area, Coefficient of Variation, Left/Right Ratio, cadence, Toe In/Out angle, Path EfficiencyExport gait measurementsDevelop Custom ProtocolsWalking (with or without dual tasking), TUG, Figure 8’s, FSST, 360° turns, Fukuda Step Test, side stepping, unilateral and bilateral stability
5 Syncing Push-button switch User marks change of event during recording for quick referencing during analysisBinary square pulseZeno Interactive ModuleUse with PKMAS for lights and tonesBuilt-in random delay featuresIdeal for gait initiationWireless XBEE inputInclinometer DevicesCup & Tray Dual TaskingTrack upper body movement( X, Y)Internal Metronome40 BPM-208 BPMSync Output (3.5mm Stereo Jack)TTL PulseLogitech Video Camera1-2 camerasSynchronized video and footfalls
6 PKMAS Angles Projection Angle of Stride Vector from heel of one foot to consecutive heel of the same foot (degrees)Useful in non-linear walking to describe movement direction at any point in timePKMAS step length considers direction of progression for optimal measurement accuracyMinimum Volume Bounding EllipseComputes ellipse with the smallest area that wholly encloses all sensors of a footfallEllipse’s major axis used to determine foot placement angleReliable over gait patterns with anomaliesEllipse theory considers the shape of entire footfallincomplete and asymmetric footfalls will display less error than competitive techniques
7 Center of Mass Estimated Exclusive COMe algorithm based on velocity and direction of pressure sensor activationAlgorithm tested in varying conditions against state of the art motion capture systems at two major US research institutionsCOM data (red) plotted against PKMAS COMe calculation (green).
8 Gait MeasurementsDisplay Gait Measurements table in PKMAS for statistical and step by step quantitative valuesEasily navigate from any footfall measure to the first or last contact time on walkwayMeasures include:Toe/Heel LocationFoot length, width, areaStep/stride time, length, widthStance, swing, gait cycleStance, swing, single/double support percentVelocity, cadenceFoot angle, direction of progressionLeft to Right Ratios
9 Exporting to ExcelExport directly from Gait Measurement table to effortlessly create plotsGraphing the Left/Right Ratio provides a meaningful depiction of asymmetrical variables
10 The ProtoKinetics Advantage PKMAS PlatformAdvanced and Accurate MeasurementsVerified, Validated and CertifiedCapable of processing many walk files that competitors cannotUser-friendly, Precise DocumentationContinuous software growthExcellent Technical supportTesting ProtocolsIncorporate new measurementsMultiple passes and turning trialsZeno Interactive ModuleZeno Walkway16 levels of pressureProtected sensing technologyAvailable in 2’ and 4’ widthsCertificationsISO 13485:2003CE Marked