E-Saximeter
Pile Dynamics, Inc. Representative Days
September 27 – 29, 2017
E-Saximeter
• Used to generate a complete Pile Driving Log• Pile Name
• Start and stop driving times
• Blow count vs. depth
• Blows per minute
• Potential Energy and stroke height
• Kinetic Energy
• Beginning and Ending Set
E-Saximeter Options
• E-Saximeter (basic)
• Energy E-Saximeter w/transmitter
• Depth E-Saximeter w/transmitter
Main Control Unt
• 7X6 non-tactile membrane keypad
• Lithium ion battery pack (>8 hrs.)
• USB output
• 4 X 16 character LCD
• Internal microphone 70 – 115 db
• Up to 8Mb internal memory
• English or SI units
• BPM 68 OED / 300 other
• Bluetooth radio w/Energy and Depth
Transmitter
• Bluetooth radio
• 100m range
• Energy E-Sax internal Lithium ion (>8 hrs.)
• Depth E-Sax external crane battery
Basic E-Saximeter
• Electronically detects hammer impact • Sound recognition circuit
• Manual keypad input
• Determines duration between blows Δt
• Converts Δt to stroke (H) of OED
• Converts H to Potential Energy of OED
Basic E-Saximeter Driving Log
Pile Name
Pile Length
Date, start/stop time
Project Name
Owner Name
Hammer Name
Hammer Weight
Hydraulic OED
Stroke and Potential Energy
Kinetic Energy E-Saximeter
• Pair of proximity switches detect ram position
• Ram position and time calculate impact velocity
• Wireless transmitter sends velocity information to the E-Saximeter
• Ram Kinetic Energy calculated asE = 1/2MV²
Kinetic Energy E-Saximeter
• Inductive Switch• Sense ram (metal)
• 30mm and 18mm
• Normally Open or Normally Closed
• 10mm sensing range
• Flush mount
• 5mm metal free zone required
Inductive Proximity Switch
Kinetic Energy field install
Kinetic Energy Driving LogHydraulic OED
Switch spacing and kinetic energy
Stroke vs. BPM
Depth E-Saximeter
• Depth sensor mounted on hammer
• Tracks movement of hammer
• Wireless transmitter sends depth of penetration information to E-Saximeter
• Completely automates generation of Pile Driving Log
• Maximum range 49m
• Resolution .6mm
Depth E-Saximeter
Encoder
Transmitter
Depth E-Sax Driving Log
• Encoder Calibration
• Beginning Set• Encoder counts blows 2 thru
11/encoder cal
• Ending Set• From last 100 blows; encoder
counts blows 86 thru 95/encoder cal
Questions?