FMCW radar ranging system

The invention discloses a frequency-modulated-continuous-wave (FMCW) radar ranging system. The ranging system is characterized in that a DDS module generates a triangular wave with a T cycle to modulate an intermediate-frequency signal obtained by an FMCW radar sensor; the modulated intermediate-frequency signal is processed by an AGC amplifying and filtering circuit and then range data are obtained by a signal processing module; and then the range data are sent into an upper computer by a ZigBee communication module. On the basis of the structure and the method, accurate and stable range measurement can be realized at the complex industrial field and the field installation wiring difficulty is substantially reduced based on combination of the FMCW radar ranging technology and the ZigBee wireless communication technology. Therefore, the FMCW radar ranging system has the great practical value.