Detection, control and alarm system for in-cabinet temperature of low-voltage switch cabinet

The invention discloses a detection, control and alarm system for an in-cabinet temperature of a low-voltage switch cabinet. The system comprises a sensor, a maintainer, an A/D converter, a power supply detector, a decoder, a display, a parameter storage, an alarm, a controller, a D/A converter, a keyboard and a singlechip, wherein the sensor is connected with the maintainer; the maintainer and the A/D converter are connected with pins of the singlechip; the power supply detector is connected with the singlechip; the singlechip is connected with the decoder through the pins; the decoder is connected with the display; the singlechip is connected with the parameter storage, is connected with the alarm through the pins, is connected with the controller through the pins and is connected with the D/A converter through the pins; the D/A converter is connected with the controller; and the singlechip is connected with the keyboard through the pins and is connected with a resetter and a clock. The system takes the singlechip as a core to form a closed-loop control system which is integrated with temperature acquisition, processing, display and automatic control, and has the advantages of simplicity, convenience, economy and reliability.