Heating Control Using Sensor Decoupling Detection
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Solution Overview
Problem
Conventional heating systems fail to detect when a temperature sensor becomes thermally decoupled from the object being heated, leading to potential overheating and damage to both the object and the heater.
Innovation Solution
The implementation of a control circuitry that monitors temperature feedback from sensors, updates temperature ranges and reference temperatures, and reduces the priority of decoupled sensors to prevent overheating, including features like timeout counters and notifications for thermal decoupling detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional heating systems use temperature sensors for feedback control, then heating control is achieved, but the system cannot detect when sensors become thermally decoupled leading to overheating
Solution Approach 1:
The system continuously monitors temperature sensor readings and compares them against expected temperature ranges and heating power levels. When a sensor reading falls outside the expected range or shows inconsistent behavior relative to heating power, the system detects thermal decoupling and adjusts control accordingly, preventing overheating while maintaining reliable heating control
Solution Approach 2:
The system establishes expected temperature ranges and reference temperatures before heating begins, and sets up monitoring criteria for thermal decoupling detection. By preparing these reference values and detection thresholds in advance, the system can immediately identify sensor decoupling events without delay, preventing harmful overheating conditions
2Object-affected harmful factors
If the system continuously monitors temperature feedback to detect thermal decoupling, then overheating is prevented, but system complexity increases
Solution Approach 1:
The monitoring system focuses on detecting specific anomalies in temperature feedback rather than analyzing all possible sensor behaviors. By concentrating on key indicators such as temperature readings falling outside expected ranges or inconsistent correlation with heating power, the system achieves effective thermal decoupling detection with relatively simple control logic
Solution Approach 2:
The control circuitry uses the existing temperature sensor infrastructure and its own heating power commands to perform self-diagnosis for thermal decoupling. The system monitors its own operational parameters and automatically detects when sensors become decoupled without requiring external monitoring equipment, thereby preventing overheating while minimizing additional system complexity
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
Prevents overheating by accurately detecting thermal decoupling of temperature sensors, ensuring safe and controlled heating processes.
Implementation Method 1
a temperature sensor that is thermally coupled to the object
Implementation Method 2
applying heat energy to the object
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
Methods and apparatus to control heating based on monitoring feedback of temperature sensors are disclosed. An example heating apparatus includes: a heater configured to apply heat energy to an object; and control circuitry configured to: control the heater based on a target temperature to which the object is to be heated; in response to determining that a first measured temperature sample associated with a first temperature sensor is greater than a first reference temperature, updating a first temperature range and the first reference temperature based on the first measured temperature sample; and in response to determining that a second measured temperature sample associated with the first temperature sensor is not within the first temperature range, reduce the priority of the first temperature sensor for control of applying the heat energy to the object.