SAR Sensor Temperature Compensation for False Trigger Prevention
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Solution Overview
Problem
SAR sensors in handheld terminals often experience false triggers due to inadequate temperature compensation during rapid temperature changes, leading to inaccurate detection of human proximity.
Innovation Solution
A temperature compensation method that includes a temperature sensing unit, processor, and SAR sensor, where the temperature sensing unit sends a trigger signal to the processor upon detecting a temperature change exceeding a preset value, activating second-order temperature compensation to complement first-order compensation, ensuring accurate tracking of temperature changes and preventing false triggers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If first-order temperature compensation is used in SAR sensor, then the device complexity is reduced, but the measurement precision deteriorates during rapid temperature changes
Solution Approach 1:
The patent implements dynamic temperature compensation by switching between first-order and second-order compensation models based on temperature change rate. When temperature changes rapidly, the system activates second-order compensation with additional terms to accurately track baseline shifts. This dynamic adaptation resolves the contradiction by adjusting compensation complexity according to actual temperature conditions, maintaining high measurement precision without unnecessary complexity during stable conditions.
Solution Approach 2:
The patent changes the compensation parameters (order of compensation) based on temperature variation characteristics. By monitoring temperature change rate and adjusting the compensation model order, the system optimizes the balance between complexity and precision. The parameter change allows the system to use simpler first-order compensation during stable temperatures and more complex second-order compensation during rapid changes, resolving the technical contradiction.
2Reliability
If temperature compensation tracking speed is increased, then the reliability of false trigger prevention is improved, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts compensation complexity based on temperature change rate requirements. During rapid temperature changes, second-order compensation is activated to quickly track baseline shifts and prevent false triggers. During stable temperature periods, the system reverts to simpler first-order compensation. This dynamic approach improves reliability when needed while avoiding unnecessary complexity during normal operation.
Solution Approach 2:
The patent changes the compensation model order as a response parameter to temperature variation characteristics. By adjusting the compensation order based on detected temperature change rates, the system optimizes the trade-off between tracking speed (reliability) and computational complexity. This parameter adaptation allows high reliability during critical temperature transitions while maintaining efficiency during stable conditions.
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 method effectively prevents false triggers by enabling real-time tracking of temperature changes, ensuring accurate detection of human proximity even during rapid temperature fluctuations, thereby improving the reliability of SAR sensor operations.
Implementation Method 1
a temperature sensing unit, configured to send a first trigger signal to a processor of the terminal in response to detecting that a temperature change amount of the SAR sensor exceeds a preset value
Implementation Method 2
the SAR sensor is configured to perform second-order temperature compensation of the SAR sensor according to a first temperature control signal sent by the processor, wherein the second-order temperature compensation compensates for baseline data of the SAR sensor
Data Source
AI summary
A temperature compensation method for a SAR sensor (3) of a terminal, and a terminal are disclosed. The terminal comprises: a temperature sensing unit (1), a processor (2), and an SAR sensor (3); the temperature sensing unit (1) is configured to send a first trigger signal to the processor (2) in response to detecting that a temperature change amount of the SAR sensor (3) exceeds a preset value; the processor (2) is configured to send a first temperature control signal to the SAR sensor (3) upon receiving the first trigger signal; and the SAR sensor (3) is configured to activate a second-order temperature compensation of the SAR sensor (3) according to the first temperature control signal, and the second-order temperature compensation compensates for baseline data of the SAR sensor (3) together with a first-order temperature compensation of the SAR sensor (3). Therefore, real-time tracking of the temperature change amount by the baseline data of the SAR sensor (3) can be ensured, and the problem in the terminal of false trigger of the SAR sensor (3) caused by drastic temperature change can be avoided.