The fuel consumption data collection device consists of a multi-functional integrated flow sensor (integrated controller), an oil return cooler, wire harnesses and installation accessories. The integrated fuel consumption flowmeter is installed between the oil tank outlet and the engine filter inlet, and is fixed on the beam inside the front wheel of the mining truck with mounting bracket screws to measure the engine fuel consumption, instantaneous fuel consumption, oil tank fuel quantity and other parameters in real time. The oil return cooler is installed at the front of the engine water tank, side by side with the mine truck air conditioning cooler, and uses the wind when the mining trucks driving and the suction of the engine fan for cooling. An integrated diesel metering device is added between the fuel tank and the engine of the mining trucks to realize accurate and real-time statistics of fuel consumption data. This device supports data output every second, and is equipped with a high-precision GPS positioning module, which can fully cover fuel consumption data collection under all working conditions such as parking idle speed and driving operation, providing high-granularity data support for subsequent analysis of fuel consumption differences under different working conditions. 3.2 Mining Trucks Data Collection By reading the mining trucks engine bus data, comprehensive collection of mining trucks operation status information is realized. The collected content mainly includes key information such as engine speed, oil temperature, transmission gear, reverse state, parking state and braking state. Engine speed and oil temperature can reflect the engine working load, which is directly related to fuel combustion efficiency; The transmission gear, reverse/parking/braking state can help judge the current operation stage of the mining truck (such as driving, parking, loading and unloading preparation, etc.), providing an important basis for subsequent accurate division of working conditions and fuel consumption attribution analysis. 3.3 Dispatching System Data Interface Two types of core data are obtained from the dispatching system: One is the mine road network data, including the road map topology, the location, length and width of each road section, the design slope, and the location and area information of key nodes (loading points, unloading points); The other is the mining truck production data, including the time nodes of no-load, heavy load, waiting for loading, waiting for unloading, loading and unloading, mining trucks load, mining trucks number, driver ID and other whole-process operation information. 3.4 GPS/Beidou Positioning Data Collection Through the high-precision GPS/Beidou positioning module, the longitude, latitude, elevation, speed, direction and time stamp are collected. The position data is matched with the road map to the design slope of section and whether in the loading/unloading area and so on; And the date such as the speed, acceleration, angular acceleration, movement distance, lifting height and other characteristics are also collected by simple calculations. At the same time, a dual-axis inclinometer is installed in the middle of the mining truck to collect the X-axis (driving direction) and Y-axis (lateral) inclination angles, making up for the deviation between the design slope and the actual slope and the change of the slope of the section. 3.5 Road Roughness Rating An industrial-grade three-axis vibration sensor (sampling frequency 500Hz) is installed on the frame under the cab to collect lateral and vertical vibration acceleration signals. A two-step preprocessing is carried out: first, the parking state data is filtered based on GPS speed to eliminate
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