Hair Styling Device Stroke Counting via Temperature Variation
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Solution Overview
Problem
Current hair styling devices lack an effective method to accurately assess hair condition and prevent damage, relying on rough measures like hair loss on brushes, which do not provide explicit indications of damage until it is severe.
Innovation Solution
A hair styling device with temperature sensors and a controller that tracks the number of strokes on a single hair strand by measuring temperature variations, incrementing a count when temperature increases and resetting when it doesn't, to prevent overheating and provide visual or audible indications when a threshold is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If temperature control is used to style hair, then styling effectiveness is improved, but hair damage increases due to repeated heating
Solution Approach 1:
The device incorporates a temperature sensor that continuously monitors hair temperature during styling and feeds this information back to the controller. The controller adjusts heating power in real-time based on the feedback signal, preventing excessive temperature exposure and repeated heating of the same hair strand, thus reducing hair damage while maintaining styling effectiveness.
Solution Approach 2:
The device performs preliminary detection of hair temperature before applying heat. The temperature sensor detects the current hair temperature, and the controller uses this information to determine the appropriate heating level, preventing premature or excessive heating that could cause damage.
2Measurement precision
If hair condition assessment is performed, then hair health monitoring is improved, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The temperature sensor serves multiple functions: it monitors hair temperature for damage prevention, assesses hair condition by detecting temperature variations, and provides data for styling control. This multi-functionality allows the device to perform hair condition assessment without adding significant complexity, as the same sensor is used for multiple purposes.
Solution Approach 2:
The device uses its own heating element and temperature sensor to assess hair condition, eliminating the need for separate measurement devices. The heating element that styles the hair also serves as the heat source for temperature-based condition assessment, allowing the system to monitor hair health using components already present in the styling device.
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 approach allows for a more accurate assessment of hair condition and prevents damage by controlling heating based on precise stroke counting, reducing hair damage and improving user awareness of styling impact.
Implementation Method 1
determining a variation in temperature of hair between the current styling operation and a previous styling operation
Data Source
Figure 1~2
Figure 3~4a
Figure 4b~5
AI summary
A device for hair styling comprises a first arm; a second arm coupled to the first arm; a temperature sensor configured to sense a temperature of hair and output a temperature signal indicative of the sensed temperature of hair; a state sensor configured to detect whether the first and second arms are opened or closed and output a state signal indicative of an open/close state of the first and second arms; and a controller configured to: in response to detecting a change in the open/close state of the first and second arms, identify a current styling operation; determine a variation in the temperature of hair between the current styling operation and a previous styling operation; and determine, based on the variation in the temperature of hair, a count that the device has operated on a same strand of hair, to thereby control the hair styling.