Dual Mode Heavy Duty J1939 Dynamic Vehicle Inclinometer And Tilt Meter & Advanced CAN-Bus Vibration Sensor

J1939 Vehicle Inertia Monitor VIM formulates moving vehicle pitch and roll tilt estimates using multiple sensor fusion and vibration monitoring for vehicle prognostics.Prova Vehicle Inertia Monitor VIM formulates moving vehicle pitch and roll

Unique in its class.  The Vehicle Inertia Monitor is not a typical digital inclinometer or tilt sensor that is commonplace in the J1939 market. Most inclinometers are intended for static environments where the vehicle is not moving and therefore generate significant pitch / roll errors when the vehicle accelerates, decelerates or turns.

The VIM incorporates advanced signal processing techniques using dynamic modeling and detected vehicle motion from the SAE J1939 CAN-Bus communication link. This results in extremely accurate pitch / roll estimates when the vehicle is in motion.

Additionally the VIM filters noise from these attitude estimates via sensor data fusion within a predictive Kalman filter to provide fast, smooth data results in real-time.

COMMON VEHICLE INERTIA MONITOR APPLICATIONS

  • Real-Time Stabilized Vehicle Pitch / Roll Estimation for Moving HEV Power Tradeoff Control
  • Road Grade and Pitch Profiling
  • Brake Life Estimation
  • Gearbox Vibration Monitoring
  • Fleet management analytics
  • Vehicle maintenance prognostics monitoring

J1939 VEHICLE INERTIA MONITOR CORE CAPABILITIES

Integrated MEMS Accelerometer and Gyroscope support Moving Vehicle Pitch and Roll Estimates

3-Axis Vibration Monitoring of SubBand Frequency Grms-Force Levels with Optional Order Tracking

Moving heavy duty vehicle pitch and roll sensor for J1939 trucks                     Digital inclinometer and tilt sensor for SAE  J1939 vehicles

VEHICLE ATTITUDE MONITORING FEATURES

Incorporates Vehicle Kinematic Model and Kalman Filtering for Real-Time Attitude Estimates

•  Uses CAN Parametrics, MEMS Sensor Data and Vehicle Frame Dimensioning
•  Gyroscope + Accelerometer Data Fusion via Advanced Kalman Filtering
•  Performs Compensation for Vehicle Frame Longitudinal and Lateral Accelerations
•  Unique Gyroscope Precession Compensation supports Vehicle Maneuvers on Inclined Surfaces

Supports Arbitrary VIM Mounting Location and Rotation when affixed to Vehicle Frame

  •  Integrated User-Interactive Calibration Functions simplify formulations of:
  •  VIM Mounting Rotation Matrix using Yaw, Pitch and Roll
  •  Vehicle Drive Wheel Speeds Difference Correction Factor

VIBRATION AND HEALTH MONITORING FEATURES

3-Axis Selectable Sensitivity / Bandwidth Vibration Monitoring Device with J1939 Interface

•  Selectable AC / DC Coupling with Full Scale Vibration Ranges of:
♦  ± 2G max : 10mG min           ♦  ± 6G max : 30mG min
•  32dB Typ Instantaneous Dynamic Range with Configurable Bandwidth / Resolution of:
VIMtable

Real-Time Grms Level Monitoring within Configurable Frequency SubBands

•  SubBand Frequency Order Tracking to a Configurable J1939 Sync Parameter

Real-Time Spectrum Display w/ Peak Hold and Logarithmic Display Options

•  Fast Update Rate across J1939 using P2P MultiPacket Messaging
•  FFT Spectral Overlapping at 25ms Frame Rate results in No Missed Data

Advanced Spectral or Cepstral Domain Based Gearbox Analyses and Profiling (Future)

•  Multipacket P2P or BAM Transmission of Matrix Data at Configurable J1939 Rate
•  Spectrum / Cepstrum Order Tracking Support to a Configurable J1939 Sync Parameter
•  Optional Bispectrum Based Analysis Mode combats High Noise Environments
♦  Supports transmission of Full 3D Bispectrum or Diagonal Slice Vector
♦  Selectable FFT Size, Window Type, Max Lag Vector and Biased / Unbiased Estimate

Real-Time Monitoring and Simple Configuration of Vibration Mode Parameters on the Vehicle Inertia Monitor

 

CONFIGURATION, MONITORING AND MAINTENANCE DEVICE UTILITY SOFTWARE

User Friendly Utility Software to Configure and Monitor VIM while Installed to Target Vehicle

•  Monitor Vehicle Attitude and Vibration Levels : Real-Time Spectrum Analyzer Window Display
•  Perform VIM Non-Volatile Configurations for Operating Mode with Associated Parameters.
 VIM Arbitrary Mounting Position 
VIMArbitraryMountingPosition
VIM Arbitrary Mounting Rotation w/ AutoCal
VIMArbitraryMountingRotationw-AutoCal

VIM Operating Mode and Settings Vehicle Wheel Speeds L/R Ratio w/ AutoCal

VIMOperatingModeandSettings
VIM Vibration Mode Parameters
VIMVibrationModeParameters
VIM Vibration Mode SubBand Configuration
VIMVibrationModeSubBandConfiguration
VIM Attitude Mode Parameters
VIMAttitudeModeParameters
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