Digital Camera Temperature Prediction Using Dual Sensors
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Solution Overview
Problem
Existing digital camera systems face challenges in predicting the time until the internal temperature reaches a predetermined limit during moving image recording, leading to insufficient recording time and potential loss of capturing essential scenes due to varying environmental temperatures and inaccurate temperature prediction methods.
Innovation Solution
The implementation of a digital camera system equipped with first and second temperature sensors to measure temperatures at different positions, a controller to limit functions, and a prediction unit that calculates the environmental temperature based on the temperature differences, allowing for accurate prediction of moving image recordable time and display of this information to the user.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single temperature sensor is used to predict the time until the housing temperature reaches the predetermined temperature, then the device complexity is reduced, but the prediction accuracy deteriorates when environmental temperature varies
Solution Approach 1:
The patent divides the temperature measurement function into two separate temperature sensors: one for measuring the internal temperature of the housing and another for measuring the external environmental temperature. This segmentation allows the system to independently monitor both temperatures and calculate the temperature difference, thereby improving prediction accuracy without excessive complexity increase.
Solution Approach 2:
The patent performs preliminary temperature difference measurement before moving image recording starts. By measuring the temperature difference between internal and external environments in advance and storing this data, the system can predict the time until the housing reaches the predetermined temperature more accurately, allowing users to plan their recording sessions effectively.
2Duration of action of moving object
If moving image recording is started immediately without temperature prediction, then the user can start recording right away, but the recording time becomes insufficient and essential scenes may be missed
Solution Approach 1:
The patent performs preliminary temperature prediction and displays the predicted recording time to the user before moving image recording starts. This allows users to plan their recording sessions based on the predicted available time, ensuring they can capture essential scenes within the predicted recording duration without losing important moments.
Solution Approach 2:
The patent provides feedback to the user by displaying the predicted moving image recording time based on current temperature conditions. This feedback loop allows users to make informed decisions about when to start recording and what scenes to prioritize, effectively utilizing the predicted recording time available.
3Measurement precision
If the temperature prediction is based only on internal temperature measurements, then the measurement system is simpler, but the prediction accuracy deteriorates under varying environmental conditions
Solution Approach 1:
The patent segments the temperature monitoring system into two independent measurement channels: internal temperature sensing and external environmental temperature sensing. This dual-channel approach enables the system to adapt to varying environmental conditions by comparing the temperature difference between internal and external environments, significantly improving prediction accuracy under different environmental conditions.
Solution Approach 2:
The patent uses parameter changes by measuring and utilizing the temperature difference between internal and external environments as a key parameter for prediction. By monitoring how this temperature difference changes over time, the system can accurately predict when the housing will reach the predetermined temperature, adapting to various environmental conditions effectively.
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 solution improves the accuracy of predicting the moving image recordable time, enabling users to plan their recording sessions effectively and preventing heat-related operational limitations, thus enhancing the convenience and reliability of digital camera operations.
Implementation Method 1
a first sensor configured to acquire a first temperature at a predetermined position, a second sensor configured to acquire a second temperature at a position different from the predetermined position
Implementation Method 2
obtain an environmental temperature based on a difference between the first temperature and the second temperature, and information about temporal variation of the difference between the first temperature and the second temperature
Implementation Method 3
the prediction unit is configured to calculate a moving image recordable time based on the obtained environmental temperature
Data Source
AI summary
An apparatus includes a first sensor configured to acquire a first temperature at a predetermined position, a second sensor configured to acquire a second temperature at a position different from the predetermined position, a controller configured to limit a predetermined function, and a prediction unit configured to obtain an environmental temperature based on a difference between the first temperature and the second temperature, and information about temporal variation of the difference between the first temperature and the second temperature in a case where the predetermined function is performed.