Railway passenger car bearing temperature detection method and digital/analog integrated temperature sensor

The invention relates to a railway passenger car bearing temperature detecting method and a digital/analog integrated temperature sensor. The inner part of the sensor probe integrates digital and analog temperature measuring chips, and the two temperature measuring chips detect the temperature of the axle box at the same time and transmit the temperature signals to a detection host through transmission lines; and the detection host receives the two temperature signals sequentially and makes independent judgment on the two signals. Then according to the temperature selection conditions, the two temperatures are selected to finally decide which one to display and analyze. The use of the method for axle temperature detection can achieve more reliable and higher beneficial effects than a single sensor used detection method.