This study reveals the successful design of the data acquisition system for pH sensors.The data acquisition system includes an instrumentation amplifier,a low pass filter and a calculation program.The instrumentation ...This study reveals the successful design of the data acquisition system for pH sensors.The data acquisition system includes an instrumentation amplifier,a low pass filter and a calculation program.The instrumentation amplifier used as the readout circuit has many advantages,including high input impedance,high gain,low output impedance,high CMRR and high bandwidth.The low pass filter is employed to cancel the circuit noise.The calculation program uses the two-point calibration method to calculate the sample concentration.Furthermore,this study employs Boolean function to cancel error signals.As indicated by experimental results,the readout circuit obtains the sensing signal and the calculation program calculates the pH value.Hence,this study successfully fabricates an effective data acquisition system for pH sensors.展开更多
This paper introduces a technique that has been used successfully in University College Dublin,Ireland and Fudan University in Shanghai,China,to teach the formal aspects of computer programming to undergraduate studen...This paper introduces a technique that has been used successfully in University College Dublin,Ireland and Fudan University in Shanghai,China,to teach the formal aspects of computer programming to undergraduate students.The technique,name and conquer,relies on the use of modelling small mathematical domains and allowing the results of these models to form the basis for the programming task.展开更多
文摘This study reveals the successful design of the data acquisition system for pH sensors.The data acquisition system includes an instrumentation amplifier,a low pass filter and a calculation program.The instrumentation amplifier used as the readout circuit has many advantages,including high input impedance,high gain,low output impedance,high CMRR and high bandwidth.The low pass filter is employed to cancel the circuit noise.The calculation program uses the two-point calibration method to calculate the sample concentration.Furthermore,this study employs Boolean function to cancel error signals.As indicated by experimental results,the readout circuit obtains the sensing signal and the calculation program calculates the pH value.Hence,this study successfully fabricates an effective data acquisition system for pH sensors.
文摘This paper introduces a technique that has been used successfully in University College Dublin,Ireland and Fudan University in Shanghai,China,to teach the formal aspects of computer programming to undergraduate students.The technique,name and conquer,relies on the use of modelling small mathematical domains and allowing the results of these models to form the basis for the programming task.
