DATA ACQUISITION SYSTEM

摘要

A data acquisition apparatus acquires an analog input signal from an analog sensor, and generates digital data based on the analog input signal for processing by a personal computing apparatus. The analog input signal has a voltage component that varies according to a condition sensed by the analog sensor. The data acquisition apparatus includes a first conversion circuit, coupled to the analog sensor that receives the analog input signal and generates an analog information transfer signal having a signal component that varies in relation to the voltage component of the analog input signal. A signal transfer device records the analog information transfer signal and transfers it to a first audio input of the personal computing apparatus. A second conversion circuit generates a digital information signal based upon the analog information transfer signal. A processor in the personal computing apparatus operates on the digital information signal to generate an information output signal that varies in relation to the voltage component of the analog input signal. The processor preferably includes a frequency-to-voltage converter module for generating the information output signal based on the frequency component of the analog information transfer signal.