Infrared Ear Thermometer Heating Layout for Sensor Temperature Uniformity
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Solution Overview
Problem
Existing ear temperature detection devices suffer from inaccurate measurements due to temperature gradients within the infrared sensor, particularly in cold environments, leading to issues such as lens fogging and thermal shock.
Innovation Solution
The device incorporates a first and second heating element to uniformly heat the front and rear ends of the infrared detection module, controlled by a unit to maintain consistent or differential temperatures, reducing the temperature gradient and improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single heating element is used to heat the infrared detection module, then the device structure remains simple, but a temperature gradient is formed within the module in the direction of infrared incidence, resulting in measurement deviations
Solution Approach 1:
The single heating element is divided into multiple heating elements arranged at different positions (front end and rear end of the infrared detection module). This segmentation allows independent control of temperature at different locations, eliminating the temperature gradient that causes measurement deviations while maintaining reasonable device complexity through distributed heating zones.
Solution Approach 2:
Different regions of the infrared detection module are provided with different heating characteristics. The front end heating element and rear end heating element can be controlled independently to achieve uniform temperature distribution across the module, ensuring that each region receives appropriate heating to maintain overall thermal uniformity and measurement accuracy.
2Object-affected harmful factors
If heating elements are incorporated into ear thermometers, then issues caused by low ambient temperatures such as lens fogging and thermal shock are mitigated, but the temperature gradient issue within the infrared sensor itself remains unaddressed
Solution Approach 1:
The heating system is segmented into multiple independent heating elements positioned at the front end and rear end of the infrared detection module. This allows the system to address both the harmful effects of cold environments (lens fogging, thermal shock) and the internal temperature gradient problem simultaneously through distributed thermal control.
Solution Approach 2:
The control unit receives temperature signals from temperature detection units and adjusts the heating elements accordingly. This feedback mechanism ensures that the temperature gradient within the infrared detection module is continuously monitored and corrected, while also maintaining adequate heating to prevent lens fogging and thermal shock in cold environments.
3Measurement precision
If multiple heating elements are used to eliminate temperature gradient, then measurement accuracy is improved, but the device complexity and control difficulty increase
Solution Approach 1:
The heating system is divided into discrete heating elements positioned at specific locations (front end and rear end). Each heating element can be independently controlled, allowing precise temperature management while keeping the overall structure organized and manageable through modular segmentation rather than a complex distributed system.
Solution Approach 2:
Heating elements are strategically positioned at specific locations where temperature control is most critical. The front end heating element addresses the front region temperature, while the rear end heating element addresses the rear region temperature, creating local quality control that achieves overall uniformity without requiring heating throughout the entire module volume.
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 solution enhances measurement accuracy by ensuring a uniform temperature distribution within the infrared detection module, preventing fogging, and maintaining consistent detection results despite ambient temperature fluctuations.
Implementation Method 1
a first heating element, the first heating element being configured to heat the front end; a second heating element, the second heating element being configured to heat the rear end
Data Source
AI summary
An ear temperature detection device, which comprises a first heating element and a second heating element. Under the control of a control unit, the first heating element is configured to heat a front end of an infrared detection module, and the second heating element is configured to heat a rear end of the infrared detection module. By heating both the front and rear ends, the overall temperature of the infrared detection module in the direction of infrared incidence (i.e., the front-to-rear direction of the infrared detection module) is made more uniform, reducing or eliminating the temperature gradient issue within the infrared detection module, thereby improving the measurement accuracy of the infrared detection module.