MEMS RF Monitoring Circuit for Miniaturized Low-Power Sensing
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Solution Overview
Problem
Existing monitoring devices based on pulse position modulation (PPM) wireless measurement technology face challenges in miniaturization and high power consumption due to multiple chips on a printed circuit board, which cannot meet the requirements of miniaturization and low power consumption.
Innovation Solution
A monitoring method and device using a micro-electro-mechanical system (MEMS) chip that collects information, outputs a pulse sequence to an RF circuit, and operates in an idle mode to reduce power consumption, integrating sensors and microprocessors into one chip for efficient data transmission and low power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple chips (sensors and MCU) are installed on a printed circuit board, then the monitoring device can process and transmit information, but the device size increases and miniaturization requirements cannot be met
Solution Approach 1:
The patent combines multiple chips (sensors and MCU) into a single integrated chip structure. The sensing chip integrates both sensor elements and microcontroller unit, eliminating the need for separate chips and reducing overall device volume while maintaining full functionality for information collection and processing.
Solution Approach 2:
The integrated sensing chip performs multiple functions within a single component: it contains sensor elements for detecting physical quantities, an MCU for processing information, and communication capabilities for transmitting data. This multi-functional integration reduces the number of discrete components needed.
2Ease of operation
If each chip operates independently with its own sleep and wake-up currents, then each chip can function autonomously, but the total power consumption increases
Solution Approach 1:
The patent merges the power management of multiple chips into a unified system. The integrated sensing chip shares common power supply and control circuits, allowing coordinated sleep and wake-up operations that reduce total power consumption compared to independent chip operation where each chip would separately consume sleep and wake-up currents.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution achieves a high degree of integration, reduces device size and power consumption, simplifies design and manufacturing, and is more suitable for industrial production and commercial applications, aligning with the trend of technology development.
Implementation Method 1
collecting monitoring information of a target object through a micro-electro-mechanical system (MEMS) chip; and outputting a pulse sequence carrying the monitoring information
Implementation Method 2
modulating a phase of a generated carrier by the oscillator according to the pulse sequence
Implementation Method 3
amplifying a modulated signal by the power amplifier, so that an amplified signal is transmitted through an antenna
Data Source
AI summary
The present application provided a monitoring method and a monitoring device based on RF technology, where the monitoring method includes: collecting monitoring information of a target object through a MEMS chip; and outputting a pulse sequence carrying the monitoring information to an oscillator and a power amplifier in a RF circuit through the MEMS chip, where the monitoring information is characterized through the pulse sequence by a time interval between two adjacent pulses; and modulating a phase of a generated carrier by the oscillator according to the pulse sequence, and amplifying a modulated signal by the power amplifier, so that an amplified signal is transmitted through an antenna; where the MEMS chip works in an operation mode when outputting a high level of the pulse sequence, and in an idle mode when outputting a low level of the pulse sequence or ending outputting the pulse sequence.