group n3: digital control
DESCRIPTION
Group N3: Digital Control. Mary Nsunwara Wayne Blake Reshun Gethers. Current Design Issues. EMG Circuit Will previous design work Signal Source & Usage Which muscles to monitor A/D Converter & Software Need PCI connection. Current EMG Circuit. Specifications. Gain: 20,000 - PowerPoint PPT PresentationTRANSCRIPT
Group N3: Digital ControlGroup N3: Digital Control
Mary Nsunwara
Wayne Blake
Reshun Gethers
Current Design IssuesCurrent Design Issues
EMG Circuit–Will previous design work
Signal Source & Usage –Which muscles to monitor
A/D Converter & Software– Need PCI connection
Current EMG CircuitCurrent EMG Circuit
SpecificationsSpecifications
Gain: 20,000Gain: 20,000Bandwidth: 1.7 - 34 HzBandwidth: 1.7 - 34 Hz Input Impedance: 10 MInput Impedance: 10 M CMRR: 100dBCMRR: 100dB
Other EMG ConsiderationsOther EMG Considerations
MindTel TNG-3B
MindTel TNG-3BMindTel TNG-3B
Is an actual electromyogramHas serial port connectionData rate: 19.2 kbpsCost: $150
TNG-3B SoftwareTNG-3B Software
Managed by NeatTools Software– Utilizes flow chart diagrams– No hard coding required
Current A/D ConverterCurrent A/D Converter
Keithley DAS-1701ST-DA –Max sampling rate: 160 kb/s – Input ranges: 0 - 5V, 1V, 100mV, 20mV – Gains: 1, 5, 50, 250– Uses DriverLINX Package Software– Does not have a PCI connection
Signal Source OptionsSignal Source Options
Eyebrows– Good contraction speed– Difficult to move one eyebrow– Low fat tissue coverage
Jaw muscles– Better contraction speed– Easier to bite on one side of mouth– Usually covered by more fat tissue
Current Design GoalsCurrent Design Goals
Front End– Build and test current EMG circuit
– Acquire a transferable A/D converterBack End– Determine best way to signal the RC
device