INNOVATIVE TRUCK LOAD ASSESSMENT SYSTEM.

摘要

The system consists of micro controller (induino), load cells, Hx711 module, motor driver IC, LCD display, buzzer,LEDs, battery, etc. Load cells are used to calibrate or detect the weight or pressure in the trolley of the truck. The load cells we have used are able to measure 10 Kg max. We have used two cells for measuring weight of trolley. Thus in total we can measure load upto 20Kg in trolley. The precision of the load cells is 0.02Kg. But the output signal given by load cells is in milli volt range, hence we can not directly measure the changes in output directly. Thus we are using hx711 module which is 24 bit ADC and amplifier. The output from load cells is given to the hx711 module it amplifies the signal and sends it to the induino controller. The load cell has five wires, two for +5v, Ov, two wires for connecting to the Hx711 module and one for shield, it can also be connected to ground. Controller process the signal and calibrates it in terms of the weight. Weight is then continuously displayed on the LCD display. LCD display used is of 16x2. It can be set in the cabin of the driver to note the weight inside trolley. Controller decides in which step of loading the system is suffering from and then sends the signal to motor driver to drive the motors of the truck. The motor driver used is L293D IC. If the weight in trolley of the truck exceeds the maximum capacity it can bear then the truck will go to shutdown till the truck is overloaded. If the truck is in first stage of overloading then only the LEDs will blink. If the truck is in second stage of overloading then LEDs and buzzer will blink. This is for final warning that the truck is going in overloading, don"t add weight inside truck. If the truck goes in final stage of overloading then the LEDs and buzzer will continuously ring and the truck will be set to shutdown. The truck can be set to shutdown by different methods. 1. Relay can be used in wiring of the spark plug which will disconnect supply of spark plug and truck will go to shutdown. 2. We can also use on-off control valves in series with pipeline of fuel coming from fuel tank of the truck.