Composite indicators detector for measuring harmful substances in milk

An electronic analytical detector was designed in this paper, which can measure composite indicators of harmful substances contained in fresh milk. The basic principle of the instrument measuring composite indicators was given firstly. Secondly the instrument structure and circuit design methods with parallel processing by a variety of sensors and processors were explained. On this basis, the mathematics model of fresh milk quality was given based on artificial neural network, which consists of a hidden layer structure, improved BP network. Finally the test data were presented, which shows the accuracy and reliability of the designed detector.