The invention provides a matrix multi-path temperature detection circuit for a small
satellite platform, comprising a matrix
thermistor measurement network, an analog switch, a main
backup analog / digital (A / D) conversion module and a main
backup singlechip controlling and
processing module, wherein the matrix
thermistor measurement network completes
voltage value collection of the terhmistor of each temperature monitor point in a
satellite system; the analog switch is matched with the matrix
thermistor measurement network to select the
voltage of a particular temperature monitor point transmitted to the A / D conversion module; the A / D conversion module is used for carrying out the
filtration, amplification and A / D conversion on a collected temperature
voltage; and the singlechip controlling and
processing module is used for setting and outputting an inspection
control signal of the matrix thermistor network and the analog switch, converting the voltage output by the A / D conversion module into a temperature value, and managing communication with a controller
area network (CAN)
bus. By utilizing the temperature detection circuit, elements and devices required for
temperature measurement of the
satellite platform are reduced, the self-
heating effect of the thermistor is reduced, the
backup design is added simultaneously, and the reliability is improved.