Corrosion Sensor Circuit Using Pull-Up Resistors
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Solution Overview
Problem
Current air conditioners lack corrosion detection sensors, leading to increased circuitry scale and manufacturing costs, and ineffective utilization of existing components for corrosion detection.
Innovation Solution
A corrosion sensor circuit comprising a microcontroller and corrosion sensors connected through resistors, allowing for the estimation of corrosion states without expanding circuitry scale or manufacturing costs, using pull-up and pull-down resistors to detect changes in resistance values indicative of corrosion progression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If corrosion detection sensors are installed in air conditioners, then corrosion state can be detected, but circuitry scale and manufacturing costs increase
Solution Approach 1:
The patent applies universality by utilizing the existing microcontroller's input/output ports for dual purposes: both their original functions and corrosion detection functions. The microcontroller's ports are configured to detect corrosion sensor signals without requiring dedicated corrosion detection circuitry, thereby achieving multi-functionality that prevents circuitry expansion
Solution Approach 2:
The existing microcontroller serves itself by incorporating corrosion detection capabilities into its existing ports. The microcontroller's internal resources (ports, clock, power) are utilized to enable corrosion detection without external auxiliary systems, making the system self-sufficient and avoiding additional circuitry
2Reliability
If corrosion detection sensors are installed in air conditioners, then corrosion state can be detected, but manufacturing costs increase
Solution Approach 1:
The patent applies universality by utilizing the existing microcontroller's input/output ports for dual purposes: both their original functions and corrosion detection functions. The microcontroller's ports are configured to detect corrosion sensor signals without requiring dedicated corrosion detection circuitry, thereby achieving multi-functionality that prevents circuitry expansion
Solution Approach 2:
The existing microcontroller serves itself by incorporating corrosion detection capabilities into its existing ports. The microcontroller's internal resources (ports, clock, power) are utilized to enable corrosion detection without external auxiliary systems, making the system self-sufficient and avoiding additional circuitry
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
Enables accurate estimation of corrosion states in air conditioners and other apparatuses, preventing costly failures by predicting corrosion progression without increasing circuit complexity or production costs.
Implementation Method 1
detect a corrosion state of an apparatus... one or more corrosion sensors connected to one of an input port and an output port of the microcontroller... Each of the one or more first resistors is connected to each of the one or more corrosion sensors
Implementation Method 2
a corrosion sensor circuit that detects a corrosion state of an apparatus... estimating a corrosion state of the apparatus
Data Source
AI summary
A corrosion sensor circuit includes a microcontroller, corrosion sensors, resistors serving as pull-up resistors, and a resistor serving as a pull-down resistor. The corrosion sensors are connected to power terminals at their respective one ends. The resistors have their respective one ends connected respectively to respective opposite ends of the corrosion sensors and have their respective opposite ends connected to an input port of the microcontroller. The resistor is connected to the input port at one end and to ground at an opposite end, being connected to no corrosion sensors.