POWER SUPPLY CIRCUIT, SENSING DEVICE AND APPLICATION THEREOF

The present disclosure provides a power supply circuit, a sensing device and an application thereof, comprising: a transducer; an energy storage assembly operably connected to the transducer; a power supply assembly electrically connected between the energy storage assembly and a power consumption module so that the energy storage assembly does not supply power to the power consumption module when the power consumption module is in a non-powered state and the output voltage is within a specified voltage interval; and the energy storage assembly is caused to supply power to the power consumption module when the output voltage is within a non-specified voltage interval.