PLANTOGRAF V07

Jaromír Volf, Stanislava Papežová,Josef Vlček, Petr Novák, René Neděla

Czech Technical University in PragueFaculty of Mechanical Engineering

Czech Republic

jaromir.volf@fs.cvut.cz

INTRODUCTION

Measurement of pressure distribution on contact human body with environment belongs to important non-invasive diagnostic methods that used not only in medicine. This transducer exploitation is supposed especially in area medical orthopedics and biomechanics for study pressure distribution on sole and its dynamic change during footstep.

CONSTRUCTION

1 – cover layer

2 – slip layer

3 – upper electrode CUFLEX

4 – conductive elastic material CS 57-7 RSC

5 – lower electrode CUFLEX

6 – antistatic layer

7 – duralumin desk

8 – antistatic layer

12

34 5

67

8

TECHNICAL PARAMETERS

Patient Mass to 120 kg

Rated Pressure Range 5 - 80 kPa

Permissible Overload 1.4 MPa

Transducer Activated Area 400 x 300 mm

Transducer Dimensions 750 x 650 mm

Sensing Elements Number 7500 pcs

Dimension of Sensor 3x3 mm

Transducer Supply Voltages + 5V + 12 V

Transducer Analogue Outputto 1V

Digital Output 256 levels

Snap Frequency 300 Hz

Sampling Frequency 2.5 MHz

SYSTEM MODES

Continuous visualization. Shows actually pressure distribution on transducer. Data are direct transferred to PC. It is possible to be seen up to 10 snaps per second.

Accuracy measurement. Measured data aren't direct visualized, but data are saved in the HDD and later these ones are transferred to PC - to be visualized Snaps number can be up to 300 snaps per second. Record time is 4 hours for 160 GB HDD.

PARAMETERS

Measurement speed

Signal gain from transducer in range from 0,5 to 5

Zero shift input signal

Mode recording start

immediate from PC external by transducer activation, e.g. by step contact

1 Working window

2 Region

3 Dialog menu

4 Pressure distribution in cut

5 Information about region

6 Vertical cut

MEASUREMENT RESULTS

2D VISUALIZATION

3D VISUALIZATION

DEFECTS

NEWS

using HDD flash memory for ultra speed

records

version with COMPACT FLASH

USB with optical separation in lieu of

parallel port

increasing of snap frequency

Thank you for your attention