SEAT TRACER
Geometry Sensing System

Behavior analysis

Analysis ofcovered areas
Seat design

3D Measurement of Boundary Surfaces

Features ◇ 3D analysis of deformation in blind spots.
◇ Flexible printed circuit boards ensure the flexibility of the device.
◇ IMU chips placed by 20mm detects acceleration andangular velocity to compute the geometry.
◇ Up to 8 lines (seating/backrest) can bearranged for simultaneous measurement.
Analysis

ST-2040A-1
The inertial (acceleration, angle) sensors estimate posture and calculate roll and pitch angles to obtain the coordinates.
Line No.
Sensordata

Sensordata

Postureestimation(ExtendedKalmanfilter)

Calculation
Roll angle
Pitch angle

Rotation matrix
Roll/Pitch angle↓
Position calculation

Postureestimation(ExtendedKalmanfilter)

Calculation
Roll angle
Pitch angle

Rotation matrix
Roll/Pitch angle↓
Position calculation

Amplifiers on both sides for crossdirection measurement against a seat
Integrated coords↓
Splineinterpolation↓
Normalizing

3次元形状の描画
3D plot
CSVデータ保存
Save data in CSV(Time-series, Sensors)（時系列・センサ列）

ST-2040B-1

Amplifiers on one side for longitudinal
direction measurement against a seatMSE≤0.5mm

*Accuracy in a static state on a
specified jig in outgoing inspection.
*MSE: Mean Square Error

OptionApplication for Data Correction
Measured coordinates are integrated tosimultaneously measured optical motion
capture coordinates. This allows data
management in global coordinates.
Measuring and correcting the two positions at
both ends reduces errors and improves
dynamic tracking performance. A fixed-point
correction version is also available.

Manages ST measured coordsin the global coordinates*Contact us for compatible motion capture systems

Free re-setting of theorigin coordinates

Specifications
SystemProduct name
Sampling frequency
Measuring method

Seat Tracer
1KHz (100Hz recommended)
Manual (software), External trigger (contact IN/Out)

Package A

ST2040A-1 for Seating (3), ST2040B-1 for Backrest (1), Slider (8), Slider base (2), USB cable (8),USB Hub, Software(Measurement & Analysis), Storage case

Package B

ST2040A-1 for Seating (4), Slider (8), Slider base (2), USB cable (8), USB Hub,Software(Measurement & Analysis), Storage caseSensing
Model
Flexible
circuit board

Controller(Control box)

External dimensions
Measuring distanceIntegrated sensors
Measuring range
Resolution
Number of sensors

ST2040A-1: Seating (two controllers)
ST2040B-1: Backrest (one controller)
ST2040A-1：976mm
ST2040B-1：908mm
780mm
Inertial sensors (3-axis acceleration, 3-axis angular velocity)
Acceleration sensor: 2,4,8,16G Angular velocity sensor: ±2000deg/s
16-bit
40Sensor pitch

20mm

External dimensions
Power supply
Current consumption

60(W)×70(L)×19(H) mm
USB≤250mA

Operating temperature

0 to 50℃, ≤85RH (No condensing)

Dimensions
ST-2040A-1

ST-2040B-1-

Inertial sensors

Inertial sensors-Control box

Geometry detection sensors
Control box

Geometry detection sensors＜Note＞
This product has flexible structure using aflexible circuit board.
The sensors may cause failure as
consumed as a result of trade-off
between durability and flexibility.
Calibration certificate cannot be issued
since 3D shapes are calculated frommeasured data. Only an inspection reportis issued using a specific shaped sample.

01.22.ST-AB(02)