The thesis presents a device for acquisition and processing of vehicle fuel measurements, which also features wireless communication capabilities. Designed for installation in commercial vehicles, it utilizes Bluetooth Low Energy (BLE) to communicate wirelessly with a modem, enabling fuel level tracking and theft prevention. The device comprises several key components: a printed circuit board (PCB), electronics, software, and fuel probes. Its primary function is to accurately measure the current fuel level in the tank, even with the engine turned off. It achieves this by using capacitive probes that calculate the fuel volume based on the dielectric properties of petroleum. Engineered with robust power protection, the device can locally convert fuel levels into liters using calibration tables. It also detects both refueling and defueling events and records this data. It supports various communication protocols, including RS232 and RS485, and integrates security features to detect irregularities, such as tampering with the tank cover.
The device's development was a multi-phase process, with gradual improvements to its assembly, protection, and overall functionality. This included incorporating several versions of the electronics and deploying software updates to enhance the device's robustness, safety, and ease of use.
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