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.
The firmware detects power supply cuts and the removal of the CF card during data recording. No data recorded up to this time will be lost. Data recording is resumed automatically as soon as the card is re-inserted and the power supply restored.
CAN messages and signals, each up to a maximum of eight separate groups, can be recorded in parallel. Each group has individual trigger and filter criteria and can be used as linear or ring buffers.
Wide trigger criteria and pre- and post-trigger ranges can be defined per channel/message group. As the capacity of the CF card is the only limit to the size of a pre-trigger, the occurrence of a trigger event can practically contain any amount of trigger data.
In contrast to data loggers with standard file systems, the write access of a UniCAN logger to a memory card is not affected by the increased segmentation of the memory device. The data is compressed during recording.
If the internet is used for data transmission, data integrity can be ensured by using the ftp command XCRC. SSH2 provides protection against data theft and data corruption.
Data can be transmitted via mobile communications modem while data recording continues without interruption. Measurement data can be read remotely via modem/(S)FTP server (data formats are, for example, MDF or ASCII). For maximum data security, the data transmission is binary.
The data transmission mode can be used to determine when the data logger should transmit data. Data can be transmitted when the ignition is switched on and off or periodically.
Data recording starts approximately 600 ms after “power on”. The logger stands out for its very low power consumption in stand-by mode.
A delay between ignition and the start of data recording can be specified.
Important status information can be displayd live via "Live Monitoring" to check configuration and data recording. This makes commissioning much easier. The following information is displayed: Status of the logger (e. g. measurement status, error status, firmware, temperature, position data), status of the measurement (e. g. measurement duration, data quantity), status of the triggers and conditions, system signals, status of the channel groups and message groups as well as current measured values of the configured channels.
The UniCAN 3 ETH is a compact and robust data logger for the acquisition of data from various sources: With the Ethernet interface, nine CAN interfaces, digital inputs and outputs and numerous data transmission options, it can be used flexibly in any measurement task.
With up to 12 CAN bus interfaces, freely configurable digital inputs and outputs, Wake-on-CAN, LAN, WLAN - When developing the UniCAN 3 data logger, numerous requirements from state-of-the-art vehicle development were taken into account.
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.
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