TireX: Difference between revisions

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Revision as of 06:12, 19 March 2020

Introduction

TireX is a powerful and versatile multi-zone tire temperature sensor designed for motorsports applications.

Features

High Performance

TireX can be configured to report up to 16 temperature zones, supporting sample rates up to 64Hz via CAN bus with the embedded 32 bit processor.

Rugged and Compact

TireX features a rugged, low profile design with a wide field of view for space constrained environments.

Flexible Setup

Orientation can be inverted for consistent data reporting between left and right sides of vehicle. Temperature zones, preferences, and calibration are customizable by the end user. CAN bus can be set for 500 or 1MB.

Specifications

Specifications are preliminary and subject to change

Feature Description
Sensor type Thermal array
Object temperature range -40 - 200C
Field of view 120 degrees
Accuracy 1C
Temperature zones 1 / 2 / 4 / 8 / 16
Sample rate 0.5 - 64Hz
Processing Engine 32 bit
Configurable positions 4 (Left-Front, Right-Front, Left-Rear, Right-Rear); Reversible orientation
Emissivity Configurable (0.95 default)
Temperature compensation Automatic
Electrical
Interface CAN 2.0
Supply voltage 6 - 12v
Power 200mW
Harness M8 4P Male, 250mm length
CAN bus
CAN baud rate 500K and 1M, jumper configurable (500K default)
Address space 4 separate address spaces (jumper configurable)
Termination No Termination (jumper configurable)
Physical / Environmental
Dimensions 64 x 46 x 12.5mm
Weight 10 grams
Operating temperature -40 to 85C
IP rating IP65

CAN bus protocol

Overview

The CAN bus API provides the configuration and control interface for TireX

CAN Baud rate

500K and 1MB rates are supported.

500K is enabled by default; cut the jumper labeled BAUD on the bottom of AnalogX to enable 1MB rate.

CAN base ID

CAN base ID is 0xA100 (41216)

Adjusting Base ID

The base address is determined by the state of the ADR1 and ADR2 jumpers. By default, the jumpers are closed (bridged); the jumper can be opened by cutting the trace between the pads. To re-close the jumper, add a small amount of solder to bridge the gap between the pads you want to close.

  • Opening the jumper ADR1 will add 4096 to the base ID
  • Opening the jumper ADR2 will add 8192 to the base ID.
ADR2 Jumper ADR1 Jumper Address
Closed Closed 0xA100 (41216)
Closed Open 0xB100 (45312)
Open Closed 0xC100 (49408)
Open Open 0xD100 (53504)

Sensor Position Offset

The sensor position will offset the base ID by the position of the sensor as defined in the table:

ID Location Offset
0 Left-Front 0x0 (0)
1 Right-Front 0x100 (256)
2 Left-Rear 0x200 (512)
0 Right-Rear 0x300 (768)

Example: default base address (0xA100)

Sensor Position Final Sensor Base Address
Left-Front 0xA100
Right-Front 0xA200
Left-Rear 0xA300
Right-Rear 0xA400

CAN Messages