Resistance Heater Temperature Validation Using Resistance Change
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Solution Overview
Problem
Existing resistance heating devices in vehicles lack a reliable method to validate temperature measurements without additional sensors, leading to potential malfunctions and increased safety risks due to incorrect temperature readings, which can cause user injuries.
Innovation Solution
A device that calculates temperature changes based on the resistance value of the heating device, using a relationship between electrical resistance and temperature, validated by an electronic data processing unit to ensure accurate temperature detection and identify malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional temperature sensors are used to validate temperature measurements, then measurement precision and reliability are improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The resistance heating device validates its own temperature sensor readings by monitoring its自身的 resistance changes. The control device calculates expected temperature based on resistance measurements and compares it with temperature sensor readings, allowing the system to self-validate without additional temperature sensors.
Solution Approach 2:
The resistance heating device's resistance measurement, originally used only for heating control, is repurposed to also validate temperature sensor readings. This multi-functional use of the resistance measurement system eliminates the need for separate validation components.
2Ease of manufacture
If the electrical resistance value of the resistance heating device is used to determine temperature, then manufacturing costs are reduced, but measurement precision deteriorates due to influencing factors such as damage, wear or manufacturing tolerances
Solution Approach 1:
The system continuously monitors the resistance of the heating device and uses this information to calculate and validate temperature readings. By comparing the resistance-based temperature calculation with the actual temperature sensor readings, the system can detect deviations caused by damage, wear, or manufacturing tolerances, thereby maintaining measurement precision.
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
This method allows for reliable validation of temperature sensors without additional sensors, enhancing safety and reducing manufacturing costs by detecting malfunctions such as short circuits or thermal coupling issues, ensuring precise temperature control.
Implementation Method 1
NTC resistors are used as temperature sensors to detect the temperature of a resistance heating device
Implementation Method 2
resistance heating devices having one or more heating wires
Data Source
AI summary
A device for determining a temperature of a resistance heating device, the device includes: a temperature sensor configured to detect the temperature of the resistance heating device; and an electronic data processing and/or control device configured to calculate a temperature change of the resistance heating device on a basis of a change in a resistance value of the resistance heating device and a relationship between the resistance value and the temperature of the resistance heating device, the electronic data processing and/or control device configured to validate the temperature of the resistance heating device detected by the temperature sensor, taking into account the calculated temperature change of the resistance heating device.