TireX
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
A configured TireX sensor will have a CAN base address that is a combination of the Main Base ID + Position Offset based on the installed position of the sensor on the vehicle. This combination creates a final Sensor Base ID
All broadcast and configuration CAN messages is offset from the final calculated Sensor Base ID.
Default Main Base ID
Default Main CAN base ID is 0xA100 (41216)
Adjusting Main 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.
- Note: In the vast majority of the cases you can use the default Main Base ID of 0xA100.
- Opening the jumper ADR1 will add (0x1000) 4096 to the base ID
- Opening the jumper ADR2 will add (0x2000) 8192 to the base ID
- Opening both jumpers ADR1 and ADR2 will add (0x3000) 12288 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 Main Base ID by the position of the sensor as defined in the table, to set the final Sensor Base ID
| Position ID | Sensor Position | Offset |
|---|---|---|
| 0 | Left-Front | 0x0 (0) |
| 1 | Right-Front | 0x100 (256) |
| 2 | Left-Rear | 0x200 (512) |
| 3 | Right-Rear | 0x300 (768) |
Example: default base address (0xA100)
| Sensor Position | Final Sensor Base ID |
|---|---|
| Left-Front | 0xA100 |
| Right-Front | 0xA200 |
| Left-Rear | 0xA300 |
| Right-Rear | 0xA400 |
