NTC Temperature Circuit Self-Test for Respirator Heating Loops
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Solution Overview
Problem
Existing respirator temperature measuring circuits require manual detection using standard resistors, leading to increased costs and potential inaccuracies in temperature measurement accuracy, which cannot be ensured during periodic checks.
Innovation Solution
An NTC temperature measuring circuit with integrated modules for monitoring, switching, and control, allowing for power-on self-testing to verify accuracy and reduce manual inspections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual detection using standard resistors is adopted, then temperature measurement accuracy can be verified, but detection cost increases and detection complexity increases
Solution Approach 1:
The temperature measuring circuit performs self-detection by automatically switching between NTC thermistor and standard resistor through a switch module, eliminating the need for manual external detection. The control module automatically controls the switching and comparison processes, making the system self-verify its accuracy without requiring external intervention or complex manual procedures.
Solution Approach 2:
The switch module serves multiple functions: it switches between connecting the NTC thermistor and connecting the standard resistor to the temperature measuring module. This single component enables both normal temperature measurement and accuracy verification functions, reducing the need for separate detection equipment and simplifying the overall detection process.
2Measurement precision
If manual detection using standard resistors is adopted, then temperature measurement accuracy can be verified, but detection cost increases
Solution Approach 1:
The standard resistor is integrated into the temperature measuring circuit board along with the NTC thermistor, switch module, and control module. This merging of components into a single integrated system eliminates the need for separate external standard resistors and manual detection equipment, reducing overall detection costs while maintaining accuracy verification capability.
Solution Approach 2:
The system performs its own accuracy verification using integrated components, eliminating the need for external calibration services or specialized detection equipment. The control module automatically manages the self-test process, making the system self-sufficient for accuracy verification and reducing external cost dependencies.
3Measurement precision
If periodic manual detection is performed, then temperature measurement accuracy can be checked, but detection time is consumed and productivity decreases
Solution Approach 1:
The temperature measuring circuit performs accuracy self-detection automatically at power-on or at scheduled intervals without requiring manual intervention. This preliminary automated action ensures accuracy is verified before actual temperature measurement tasks begin, eliminating the need for separate periodic manual detection and improving overall productivity.
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
Ensures accurate temperature measurement by automating the detection process, reducing costs and avoiding manual inspections while ensuring timely identification of faults.
Implementation Method 1
The respirator is an NTC (Negative Temperature Coefficient) thermistor temperature measuring product
Implementation Method 2
the detection module includes a plurality of detection resistors, one end of each detection resistor is electrically connected to the switch module, and the other end of each detection resistor is electrically connected to the control module
Data Source
AI summary
An NTC temperature measuring circuit, a respirator and a power-on self-test method for the respirator are provided. The NTC temperature measuring circuit includes temperature measuring module, switch module, control module and detection module; the control module is electrically connected to the temperature measuring module, the detection module and the switch module in respective; the switch module is electrically connected to the temperature measuring module and the detection module in respective; the temperature measuring module is configured to monitor a temperature of a detected part in a heating loop; the switch module is configured to switch the on-off between the temperature measuring module and the detection module; the detection module is configured to verify a temperature of the temperature measuring circuit; and the control module is configured to adjust the temperature of the detected part in the heating loop, and to judge the accuracy of the temperature measurement.