Last modified: Jul 26, 2023

ZENO ELECTRONIC WALKWAY

Encapsulated within the Zeno electronic walkway, and below the top cover, are pressure sensitive sensors positioned in a two-dimensional array with pre-determined spatial arrangement and pre-assigned position coordinates. As a subject ambulates across the surface of the electronic walkway, the ground pressure changes the state of the internal sensors in contact. The state of each sensor is recorded, in pre-determined time intervals, by the electronics residing along one side of the outer perimeter of the walkway.

For every activated sensor the Zeno Walkway delivers the following basic measurements:

Position coordinates (X and Y);
Activation time; and
Pressure level.

Zeno Walkway Models & Options

Model: ZENO2
Active Area size:
Width: 2 Feet
Length: 12, 14, 16, 20, 26, 40 and 52 Feet

Model: ZENO3
Active Area Size:
Width: 3 Feet (.375" Spatial Resolution)
Length: 18 Feet

Model: ZENO4
Active Area Size:
Width: 4 Feet
Length: 4, 8, 16, 20 and 26 Feet
Also available, the Convertible Option to reduce the width to 2 feet and doube the length.

Model: ZENOC
Custom Zeno Walkways:
All Zeno Models can be engineered to be used with Children ages 1 or older (weight 10-120 lbs).
Custom Walkway sizes and patterns are available upon request.

Zeno Specifications
Spatial Resolution: .5” (1.27cm)
Spatial Resolution Accuracy: ±.5” (±1.27cm)
Sampling Rate: 60, 80, 100, 120Hz
Temporal Accuracy: ±1 sampling Rate
Pressure Levels: 16
Pressure Accuracy: ±1 Level
Power: 9-12VDC, 3.0A

Top Layer: Flame retardant, linoleum
Bottom Layer: Open cell neoprene rubber
Internal Materials: Uncoated polyesters

Storage & Transport Temperature
-29-50 degrees C, (-20-122 degrees F)
Storage & Transport Humidity
Relative humidity up to 80%

PKMAS Software

The Zeno Walkway System utilizes the PKMAS Software to process the raw data into meaningful measurements. The PKMAS software applies common physics and math formulas to the data delivered by the Zeno Walkway in order to identify the footfalls and compute temporal, spatial and pressure measurements in the relationship between footfalls. The PKMAS Software is a scientific toolkit developed to acquire, process and compute, accurately and efficiently over 100 movement measurements.

The PKMAS software utilizes the Minimum Volume Bounding Ellipse algorithm to compute the ellipse with the smallest area that completely encloses all the activated sensors of a footprint and can be used to analyze footprints based on:

Walking (Forward and Backward)
Transitional Movements (Initiation, Turning, Termination)
Static and Dynamic Balance
Running
Jumping and Hopping

PKMAS data, subject and trial details, raw walkway data, and PKMAS calculations, can be easily exported to text or Excel spreadsheet.

Zeno Interface

The Zeno Interface Module is an integral part of the Zeno Walkway System. It supplies power and timing clocks to the Zeno Walkway, provides the communications cabling between the Zeno Walkway and the host computer and provides means to interface and synchronize with external systems. The Zeno Interface Module contains the following features:

Power Input connection
USB connection for the host Computer
Proprietary connection for the Zeno walkway
Communication Status indicator
SYNC OUTPUT for Synchronizing with other systems
SYNC INPUT for Synchronizing with other systems
LIGHT SW INPUT for Manual Event Capture
LIGHT OUTPUT for Gait Initiation Lights
METRONOME adjustable to 40-208 Beats/Minute
Proprietary WiFi Interface

Zeno Inertial System (ZIS)

The Zeno Inertial System (ZIS) is based on the Analog Devices Inc. iMEMS technology and includes a triaxial gyroscope and triaxial accelerometer. Each inertial sensor is calibrated for sensitivity, bias, alignment and linear acceleration and has its own dynamic compensation formulas to provide accurate sensor measurements over a range of -20 to +70 degrees Celsius.

The ZIS Module has been designed to include a belt for easy attachment around the subject’s waist. The belt includes flexible plastics to tightly fit around the body contours as to prevent shifting or movement of the ZIS Module during testing.

WiFi Synchronization with the Zeno Walkway
Sampling Rate 120 Hz
Triaxial Gyroscope Range: ±300°/sec
Tight Orthogonal Alignment: <0.05°/sec
Sensitivity: 0.05°/sec
Triaxial Accelerometer Range: ±1.7 g
Tight Orthogonal Alignment: ±0.2 degrees
Sensitivity: 0.333 mg
Rechargeable battery provides 20 hours of operation between charges
Lightweight 250 g (8 Oz)
Size 10.2cm x 7.6cm x 2.5cm (4.0”x 3.0”x1.0”)
Automatic Power shutdown (10 min. idle)
2000 g shock survivability

Indications

The Zeno Electronic Walkway with PKMAS software is intended to be utilized for the study of events occurring during biped and quadruped locomotion as related to temporospatial parameters and ground pressures without referring to its etiology.

The Zeno Electronic Walkway is non-invasive, does not require any attachments to the subject and can be utilized in research, education and clinical settings.

The Zeno Electronic Walkway device should not be used for the Diagnosis or Therapy of walking disorders.