Intelligent site construction environment detection device

The invention discloses an intelligent site construction environment detection device. A signal receiving circuit supplies power for a sensor X1 by adopting a constant voltage source, a site construction environment signal detected by the sensor X1 is amplified through differential balancing, abnormal high/low level is fed back to an input end of an operational amplifier AR3 by adopting a triode Q2/Q3, thereby guaranteeing that the signal enters a frequency-modulation main circuit between 0-5V and is frequency-mixed with an oscillation signal produced by a capacitance type three-point oscillation circuit after the sampling maintenance so as to be modulated as high-frequency signal and resonated by a resonance circuit, and finally, the high-frequency signal is output to an emitter after being filtered; a feedback frequency-modulation and amplitude-modulation circuit collects an output signal of the frequency-modulation main circuit, the output signal is converted into a voltage signal,one path is fed back to t