Micro Force Sensor Breathing Amplitude Detection
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Solution Overview
Problem
Existing breathing amplitude detection methods using gas or fluid detection devices can disrupt the natural breathing process and are not suitable for continuous monitoring, especially in sensitive scenarios such as infant sleep or elderly health monitoring.
Innovation Solution
A breathing amplitude detection system based on micro force detection, which includes a micro force detection sensor, a processor, a sensor power supply circuit, an operational amplifier, and a feedback resistor, to measure and calculate breathing amplitude with minimal disruption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If gas or fluid detection devices are placed at a person's mouth to detect breathing conditions, then breathing conditions can be detected, but the smoothness of human breathing is affected
Solution Approach 1:
The patent replaces gas/fluid detection devices with a micro force detection sensor that measures mechanical force changes on the skin surface caused by breathing movements. This substitution eliminates the need for intrusive mouth-based detection while maintaining breathing monitoring capability through force-sensitive measurements.
Solution Approach 2:
The patent introduces a micro force detection sensor as an intermediary element placed on the skin surface (chest or abdomen) to indirectly measure breathing amplitude through force changes. This intermediary approach allows breathing detection without direct contact with the respiratory tract, preserving natural breathing flow.
2Duration of action of moving object
If gas or fluid detection devices are used for continuous monitoring, then breathing conditions can be monitored, but they are not suitable for sensitive scenarios such as infant sleep or elderly health monitoring
Solution Approach 1:
By replacing intrusive gas/fluid detection devices with a non-invasive micro force sensor system, the patent enables continuous monitoring that is comfortable and suitable for sensitive populations such as sleeping infants and elderly patients, eliminating the discomfort and complexity of previous methods.
3Object-affected harmful factors
If a micro force detection sensor is used to sense breathing movement amplitude, then minimal disruption to natural breathing is achieved, but the sensor output voltage needs amplification to be usable
Solution Approach 1:
The patent implements a feedback-based operational amplifier circuit where the output voltage is fed back through a feedback resistor to control the amplification of the sensor signal. This feedback mechanism enables precise control of signal amplification while maintaining system stability, converting the weak sensor output into usable measurement signals.
Solution Approach 2:
The patent changes the voltage parameter through controlled amplification using the operational amplifier circuit. By adjusting the feedback resistor value, the system dynamically changes the output voltage parameter to match the required measurement range, making the微弱 sensor output suitable for processing.
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 system provides a non-invasive and more convenient method for detecting breathing amplitude, reducing the impact on natural breathing and enabling continuous monitoring with the ability to issue alarm signals when thresholds are met.
Implementation Method 1
the sensor is a micro force detection sensor, which can be connected to the user and senses the amplitude of the user's breathing movement
Implementation Method 2
the second terminal of the sensor and the first terminal of the feedback resistor are connected to the first input terminal of the operational amplifier; the second terminal of the feedback resistor is connected to the output terminal of the operational amplifier
Data Source
AI summary
This application provides a breathing amplitude detection solution based on micro force detection. In this solution, the breathing amplitude detection system includes a sensor, a processor, a sensor power supply circuit, an operational amplifier, and a feedback resistor. The sensor is a micro force detection sensor. The sensor can be connected to a user and sense the amplitude of the user's breathing movements. The sensor supply circuit is connected to the first terminal of the sensor and provides a reference voltage to the sensor. The second terminal of the sensor and the first terminal of the feedback resistor are connected to the first input terminal of the operational amplifier. The second terminal of the feedback resistor is connected to the output of the operational amplifier. The output of the operational amplifier is connected to the processor to transmit the measured voltage. The processor maps the measured voltages to discrete voltage values. The processor calculates the amplitude of the user's breathing movement based on the discrete voltage values. When the amplitude of the breathing movement falls below a preset threshold, the processor controls to issue an alarm signal.