Pitch and Roll Inclinometer Tilt Sensor

J1939 Vehicle Inertia Monitor VIM2

Formulates Moving Vehicle Pitch and Roll Tilt Estimates using Multiple Sensor Fusion

J1939 Vehicle Inertial Measurement and Vibration Monitoring Device

 

Basic Features:

DSP Microcontroller Hosts Advanced Data Processing Algorithms and Applications

J1939 CAN Bus Interface to Acquire and Transmit Vehicle Data used in Parameter Calculations

Single Low Cost Automotive Grade 6-Contact Connector for Power and CAN Bus : TriColor Status LED

Thick Walled ABS Plastic Enclosure with Brass Press Inserts : 1.9” L  x  2.3” W  x  0.56” H

-40C to +85C Wide Temperature Range Operation for Harsh Environments : Epoxy Potted : Waterproof

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

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 VIM2 Mounting Location and Rotation when affixed to Vehicle Frame

•  Integrated User-Interactive Calibration Functions simplify formulations of:

♦  VIM2 Mounting Rotation Matrix using Yaw, Pitch and Roll

♦  Vehicle Drive Wheel Speeds Difference Correction Factor

Gearbox Vibration and Health Monitoring Features:

3-Axis 2KHz Bandwidth Vibration Monitoring Device with J1939 Interface

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 250ms 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

 

 

VIM2 Specifications Sheet: VIM2 Specifications Sheet v1a (.pdf)     (mirror server)

 

VIM2 Vehicle Pitch / Roll Video: VIM2 Attitude Estimates Example (.wmv)     (mirror server)

•  Video Shows Actual Update Rate for VIM2 Pitch / Roll Estimates during Vehicle Maneuvers

•  Real-Time Attitude Estimates of Vehicle doing Qty-2 Figure-8 Patterns on Smooth 6-Degree Ramp

•  Thin Dashed Trace shows Noisy Accelerometer-Based-Only Estimates

♦  Vehicle Frame Acceleration Compensation is Included within Accel-Only Estimates

•  Thick Solid Trace Fuses Precession-Compensated Gyroscope Data to the Accel-Only Estimates

 

 

VIM2 Vibration GUI Screen Shot: Swept Sine Wave on Small Speaker Diaphragm

 

VIM2 Evaluation Software : Real-Time Spectrum and Vibration GUI

 

J1939 USB CAN Interface UCI1

 

 

 

Features:

Establishes In-Vehicle Link between Device Utility Software and Vehicle-Installed VIM2 Unit(s)

Used to Perform In-Vehicle VIM2 Configuration, Real-Time Data Inspection and Firmware Upgrades

Standard 9-Pin J1939 Deutsch Locking Connector : PC Host and J1939 Bus TriColor Status LEDs

Galvanically Isolated USB 2.0 Interface with Standard Mini-B Connector

 

ZigBee DSP Inertia Monitor DIM1 + Remote Sensor Monitor RSM1

- Developed by Yashu Systems for Boeing Aircraft -

- Advanced Rotorcraft Technology -

Boeing Adaptive Vehicle Management System - Streaming Video (.wmv)     (mirror server)

 

 

DIM1

DSP Inertia Monitor v1

 

 

RSM1

Remote Sensor Monitor v1

 

DIM1 Features:

Supports TC / RTD, Pressure, Flow, Strain, Proximity, 4-20mA, Analog & ICP Accelerometer Sensors

Integrated 6-DOF Inertial Measurement Unit : Extended Kalman Filter provides Pitch / Roll Estimates

2 Configurable Input Channels based on Wheatstone Bridge : 2 ICP Accelerometer Channels

Universal Sensor Input Channel Design supports Almost Any Sensor Type

Robust Bridge Interface Allows for Quarter, Half or Full Bridge Configurations

Isolated Programmable Constant Current Source Excitation for Each Sensor Channel

Deep Sleep Capability with Motion Sensing Wakeup : Qty 4 AA NiMH Batteries Drawer

 

RSM1 Features:

Provides Wireless Interfacing from DIM1 to a Remote Sensor : Support for Various Sensor Types

Programmable Gain Inst Amplifier : Floating Differential Inputs : High Capacity 2/3A Lithium Battery

Integrated 3-Axis MEMS Accelerometer : Deep Sleep Capability with Motion Sensing Wakeup

Provides Programmable Constant Current Sensor Excitation for Immunity to Sensor Cable IR Losses

High Grade Aluminum Enclosure : Waterproof / Shockproof : -40C to +85C Temperature Range

Operates in Extreme Environments : Up to +/- 50G Continuous Acceleration Force along any Axis

 

ZigBee DSP Sensor Module DSM1 : 802.15.4 Wireless Universal Sensor Interface Module

- Developed by Yashu Systems for BAE Systems -

Supports TC / RTD, Pressure, Flow, Strain, Proximity, 4-20mA, Analog & ICP Accelerometer Sensors

4 Configurable Input Channels based on Wheatstone Bridge : 2 ICP Accelerometer Channels

Universal Sensor Input Channel Design supports Almost Any Sensor Type

Robust Bridge Interface Allows for Quarter, Half or Full Bridge Configurations

Isolated Programmable Constant Current Source Excitation for Each Sensor Channel

 

 

1Hz to 5KHz BW Accelerometer Channels with Programmable AntiAlias LowPass Filter Cutoff

24VDC @ 4mA Constant Current ICP Accelerometer Excitation Support

Programmable Gain Amplifiers on All Sensor and ICP Accelerometer Channels

HiSide Power Switches for Channel Banks allow Robust Sleep Modes to conserve Battery Life

40MHz 16-Bit Fixed Point DSP with 2 MByte SRAM

USB 2.0 Full Speed Host Interface for Maintenance and Configuration

Logs Sensor Data using Per Channel User Specifiable Rates

Dual 3.6V D-Cell Lithium Batteries provide Months of DSP Processed Data Logging Operation

-40C to +85C Wide Temperature Range Operation for Harsh Environments

Rugged Urethane Boot Cover provides High Water Resistance

Extruded Aluminum Base provides Secure Vehicle Attachment

Sensor Cables feed through Cable Channels to Screw Terminals under Protective Boot

10-32 Coax ICP Accelerometer Connectors provide Extremely Low Noise Interfacing

 

DSM1 Unique Functionality

• Independent Channels allow configuring 4 Different Sensor Types on a single DSM1 Unit

• Floating Differential Input Channels provide Isolation and High CMRR for Attached Sensors

• 7-Screw Terminal Channel Connector leverages attachment of Various Sensor Types

• Selectable Ranges for TCs provide Cold Junction Compensated Hi-Resolution Dynamic Ranging

• Selectable Ranges for ICP Accel, RTD, Strain and Analog Voltage Sensors increases Readout Resolution

• Optional API Development Library allows user to create Custom DSP Firmware Algorithms

• Optional Auxiliary I2C Port allows connection of Application Specific Smart Sensors

 

DSM Specifications Sheet: DSM1 Specifications Sheet v4 (.pdf)     (mirror server)

API Script Library Functions: DSM1 Script Library Functions (.pdf)     (mirror server)

Email: info@yashu.com

 

 

J1939 Vehicle Inertia Monitor VIM1 (Deprecated - See VIM2)

- Developed by Yashu Systems for BAE Systems -

Economical J1939 Vehicle Inertial Measurement and Vibration Monitoring Device

Features:

DSP Microcontroller Hosts Advanced Data Processing Algorithms and Applications

J1939 CAN Bus Interface to Acquire and Transmit Vehicle Data used in Parameter Calculations

Single Low Cost Automotive Grade 6-Contact Connector for Power and CAN Bus

Thick Walled ABS Plastic Enclosure with Vertical / Horizontal Mounting : 1.4” W  x  2.2” H  x  0.7” D

-40C to +85C Wide Temperature Range Operation for Harsh Environments : Waterproof

Capabilities:

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

Data Fusion via Advanced Kalman Filter with Vehicle Longitudinal / Lateral Acceleration Compensation

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

Power Spectral Density versus Wave Number Computation for Longitudinal Terrain-ID Profiling

XCP Protocol Support w/ ASAP2 File (.A2L) Provisioning to speed and simplify End-User Implementation

Standard Measurement Modes:

1: Attitude      ► Vehicle Pitch / Roll Estimates

2: Vibration    ► Configurable SubBand Frequency G-Force RMS Levels

3: Terrain-ID  ► Vertical (Elevation) Vibration Power Spectral Density versus Wave Number

Applications:

Real-Time Stabilized Vehicle Pitch / Roll Estimation for Moving HEV Power Tradeoff Control

Gearbox / Transmission Vibration Monitoring  ●  Road Grade and Elevation Profiling

Terrain-ID and Severity Estimation  ●  Brake Life and Tire Wear Estimation

 

Example Vehicle Pitch Scatter Plot Profiles: VIM1 Vehicle Pitch Profiles (.pdf)     (mirror server)

NOTE: Above document shows pitch for departing and return trips under normal driving dynamics

Email: info@yashu.com

 

 

Vehicle Inertia Monitor and USB CAN Fob Evaluation Kit

 

 

Vehicle Inertia Monitor Evaluation Software : Vibration GUI

 

 

Vehicle Inertia Monitor Evaluation Software : Attitude GUI

 

 

Vehicle Inertia Monitor Evaluation Software : Vehicle Pitch GUI