Design Of Capacitance Type Dynamic Weighing Measuring Device For Sand And Gracl

Level measurement is an important measurement methods engineering.Level measurement in concrete for sand,design a capacitive level meter gravel to improve the existing methods of measurement accuracy and stability issues.Since the input capacitance sensor is small,within the scope of small capacitors.So for small capacitance measurement,the paper compares the variety of measurement,and ultimately chose to build capacitance measurement circuits CAV444 chip.In order to make gravel intelligent metering system,we use the STC89C54 microcontroller as the controller for data processing,and coordinating the work of the normal operation of each module.After completion of commissioning work of the circuit,in order to make the whole system more stable,the paper will integrate the entire system,making the PCB board,to improve the stability and anti-jamming circuit,simplifying the measurement procedure.For making a good circuit,a large number of measurements The experimental results show that the stability of the sand metering system,better anti-interference,high practical value.