Architecture

*Installer role - Installers commission or decommission sensors using the TraX mobile app. This role can be held by the fleet, the partner, or 3rd party company such as repair shops or OEMs.

TSP's side

The TSP is assumed to have an IoT platform that spans a central platform and remote computing capabilities on each Edge (i.e. vehicle). Furthermore, the Edge is assumed to house a Bluetooth receiver that enables the TSP to capture sensor data broadcasts from the TraX sensor, as well as processing and remote connectivity capabilities that enable sending the sensor data to the TSP's central platform for analytics.

TraX client

The TraX client implements 3 Integrations and runs in the TSP's environment.

SKF side

Sensor

The TraX WEM-200/32 is a battery-powered, wireless sensor that can be mounted on the wheel. It monitors the condition of the bearing and measures its temperature. The data it collects is sent by BLE (Bluetooth Low Energy as advertisement frames. The sensors' expected behavior is described in TraX - WEM200 - technical specification.

Hardware revisions & firmware

Sensors have identical hardware but the mounting plate can differ. The sensor can be flashed with firmware suited for different use cases. All sensor firmware communicates over BLE.

Firmware for production usage:

• Stable firmware - A firmware suitable for production usage.

Firmware for development:

• Bearing faults firmware - Firmware that produces bearing faults.
• WEM faults firmware - Firmware that produces WEM faults.

Mobile app

The mobile app is used to create virtual replicas of real-world vehicles targeted for TraX deployment. Using the mobile app, sensors can then be commissioned (added) or decommissioned (removed) from the vehicle. The mobile app is released for iOS and Android.

Partner APIs

See Integration architecture.

SKF platform

TraX is built on top of an IoT platform from SKF called SKF Enlight Centre. The SKF Enlight Centre is a web-based software that is designed to facilitate the collection and analysis of machine data. Enlight Centre then uses this data to provide insight and actions that help SKF improve the customer’s efficiency and reliability.

While TraX benefits from the device management, vehicle topology, user management, and access control capabilities provided by SKF Enlight Centre, in daily usage, it's only appointed user administrators who are expected to use Enlight Centre to provision users and grant them access to vehicles.

The component in the Enlight Centre responsible for housing the vehicle topology is referred to as Enlight Hierarchy.

Vehicle Store

The Vehicle Store is a way to let TSPs make vehicles searchable in the TraX mobile app. The reason the Vehicle Store exists is because of the requirement to create the vehicle in the SKF platform before commissioning sensors.

Vehicles are described using name (or title/description), VIN other information. Manually providing this information takes time can be hard to get right, and may lead to data quality issues.

The Vehicle Store is essentially a staging table where TSPs can maintain a list of vehicles that becomes searchable from the TraX mobile app. To be clear, uploading a vehicle to the TraX vehicle does not automatically add the vehicle to the SKF platform. It only enables the TraX mobile app to search for it.

Implementation instructions for maintaining a list of vehicles in the Vehicle Store are provided in the Vehicle store integration.

While SKF is responsible for providing the TraX vehicle store service, it is the responsibility of the TSP to ensure it gets populated with vehicle definitions and remains up-to-date.

// Vehicle definition example
{
  "fleetId": "740f410b-7f37-4dbc-9cc5-f7c160005dc7",
  "vehicleId": "a14d379e-15af-4df4-ac77-fa8a16fe9923",
  "vin": "C25HA5R6LO5T2TE",
  "vehicleName": "SPACE TRUCK 8459",
  "brand": "Volvo",
  "model": "VHD 300 AF",
  "latitude": 57.69699,
  "longitude": 11.9865
}

Example: Vehicle definition example

The one-way TraX vehicle store synchronization flows (see Vehicle store integration) do not include GPS information. It is only when a TraX mobile app user needs to know about the location of nearby vehicles that only these vehicles are enriched with GPS information.

The section about "Connected vehicles" in the Concepts article describes how the Vehicle Store and vehicles in the SKF platform are related.