Fail-Safe Data Recording 
Fail-Safe Data Recording
Mobile recording of measurement data is subject to changing requirements:
The UniCAN data loggers from CSM offer a solution for all these requirements. Despite their compact size, the microcontroller-based devices are very powerful. The CSM proprietary file system used for data recording to CF card is optimized for storage rate and data security.
Data recording starts from approx. 600 ms after “Power On”. A start delay can be defined for the start of recording.
In standby mode, the loggers impress with their very low power consumption of less than 1 mA at 12 V (12 × Wake-on-CAN). This means that the load on vehicle electrical systems is minimal. In normal operation, consumption is typically around 3 W.
The UniCAN3 data loggers have been designed for use in harsh environmental conditions. Data is also recorded reliably in the event of vibrations, such as those that occur in road tests. For this purpose, the loggers are tested for compatibility with vibration and shock in a laboratory.
With the extended operating temperature range of -40 °C to +80 °C, they are suitable for reliable use in challenging environmental conditions.
In addition to the technology required for data recording, the compact housing combines other components that make the data loggers a true all-in-one solution: LTE, WLAN and GPS are integrated into the housing. This eliminates the need for additional peripheral devices and saves installation effort and space.
Despite the numerous technical features, the UniCAN3 data loggers are characterized by very compact housing dimensions of 109 × 45 × 158 mm and can therefore also be installed in confined spaces.
Even long-term recordings run stably and without failures.
If the power supply is interrupted or the CF card is removed during recording, the data recorded up to that point is not lost. This is ensured by the type of data storage, the file system used and the CF cards verified for the UniCAN 3. Data recording is resumed automatically as soon as the card is re-inserted and the power supply restored.
Wide trigger criteria and pre- and post-trigger ranges can be defined per recording group.
Each group has individual trigger or filter criteria and can be managed as a linear or ring buffer.
MQTT (Message Queing Telemetry Transport) can be used to display real-time information on the operating status of the logger and selected measurement channels remotely. The live data is transmitted via modem or WLAN.
This facilitates the management of vehicle fleets, as errors or deviations can be detected quickly. Status information of the devices (e.g. card fill level and position data) and selected measurement channels are displayed. The individual configuration allows the information relevant to the application to be selected.
Data security is ensured by user authentication and data encryption using the TLS protocol.
Note: The MQTT broker and the setup of the dashboard are not part of CSM's scope of services. The setup must be carried out by the user or a service provider.
Measurement data can be transmitted to a server via modem or WLAN simultaneously with data acquisition. An encrypted transmission path ensures the protection of sensitive measurement data.
To ensure maximum data security, the data is also transmitted in a proprietary binary data format.
The data transmission mode can be used to determine when the logger should transmit data. Data can be transmitted at the start or end of the measurement run or periodically.
The configuration of the UniCAN 3 data logger can be changed via modem or WLAN, making it easy to make adjustments without having to access the device on site.
Important status information and measurement data can be displayed live via "Live Monitoring" to check configuration and data recording. This makes commissioning much easier.
The following information is displayed:
