Monitoring method and device based on radio frequency technology

A monitoring device based on radio frequency (RF) technology, comprising a micro electro mechanical system (MEMS) chip, an RF circuit and an antenna;

• wherein
• the MEMS chip is configured to collect monitoring information of a target object, and output a pulse sequence carrying the monitoring information to an oscillator and a power amplifier in an RF circuit through the MEMS chip;
• wherein the monitoring information is characterized through the pulse sequence by a time interval between two adjacent pulses, wherein when outputting the pulse sequence carrying the monitoring information to the oscillator and the power amplifier in the RF circuit through the MEMS chip, the MEMS chip is further configured to correct an internal clock frequency of the MEMS chip through an external clock frequency;
• the RF circuit is configured to modulate a phase of a generated carrier by the oscillator according to the pulse sequence, and amplify a modulated signal by the power amplifier;
• and
• the antenna is configured to transmit an amplified signal;
• wherein the MEMS chip works in an operation mode when the MEMS chip outputs a high level of the pulse sequence;
• and the MEMS chip works in an idle mode when the MEMS chip outputs a low level of the pulse sequence or ends outputting the pulse sequence, wherein when the MEMS chip works in the idle mode, the RF circuit is turned off,
• wherein the idle mode comprises:
• a deep sleep mode and a light sleep mode;
• wherein the MEMS chip works in the light sleep mode when outputting the low level of the pulse sequence;
• and the MEMS chip works in the deep sleep mode when ending outputting the pulse sequence.