Multichannel temperature acquisition system

The invention provides a multichannel temperature acquisition system, which comprises a sensing unit, a current source, a multichannel scan switch unit, an analog-to-digital converter, a controller, and the like, wherein the sensing unit comprises a group of temperature sensors for acquiring temperature of the environment surrounding the multichannel temperature acquisition system; the current source is used for providing exciting current for the sensing unit; the multichannel scan switch unit is used for selecting the temperature sensors of the sensing unit and sending temperature data acquired by the selected temperature sensors to the analog-to-digital converter; the analog-to-digital converter is used for converting an analog signal selected by the multichannel scan switch unit into a digital signal and providing the digital signal to the controller; and the controller is used for processing a switch selection signal provided by the multichannel scan switch unit, a selection signal provided by the current