Design of extensible multi-source signal acquisition device based on DSP and STM32

摘要

As large number of multi-type sensor signals were required to be collected in numerical control machine tool test, general acquisition system could only collect certain type of sensor signal, which did not have extended function so that its application scope in machine tool test was limited, leading to excessive acquisition equipment categories and insufficient compatibility with each other. Aiming at above-mentioned problems, a kind of extensible multisource acquisition system based on DSP and STM32 was designed, which took microcontroller as DSP and STM32. DSP microcontroller was mainly used to complete data acquisition and output function, while STM32 microcontroller was mainly used to complete data storage and communication function. Acquisition system had multi-source signal interface, which could automatically identify analogue signal type and could support parallel acquisition for temperature, vibration, voltage, current, pressure, displacement, and other types of signals. Extended function could be realised so as to increase multi-channel analogy input interface through removable extended module so as to satisfy acquisition requirements for different machine tool tests.