Smartwatch Wristband Optical Fiber Pulse Sensor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Smart watches have a low accuracy in measuring heart rate due to the deep burial of blood vessels on the wrist and uneven blood volume, leading to large measurement errors.
Innovation Solution
A smart watch design with a blood vessel information collecting apparatus in the watchband that uses transmitting and receiving optical fibers, a fixing apparatus, and a processing apparatus to collect and process blood vessel information from the inner side of the wrist, where blood vessels are shallower and blood volume is uniform, improving measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measuring apparatus is disposed on the back surface of the dial to measure heart rate through blood vessels in the back of the wrist, then the smart watch can provide real-time detection, but the measurement accuracy is low due to deep burial of blood vessels and uneven blood volume
Solution Approach 1:
The patent moves the measuring apparatus from the traditional dial back surface to the watchband, changing the spatial dimension of measurement. This allows the optical fibers to contact the inner wrist surface directly, where blood vessels are shallower and blood volume is more uniform, thereby improving measurement accuracy without significantly increasing device complexity
Solution Approach 2:
The patent introduces optical fibers as intermediaries to transmit light between the light source and the blood vessels. The transmitting optical fiber delivers light to the inner wrist, and the receiving optical fiber collects reflected light, enabling accurate pulse detection through the watchband structure
2Device complexity
If the measuring apparatus is disposed on the back surface of the dial, then the structure is simple, but the measurement accuracy is low due to deep blood vessels and varying blood volume
Solution Approach 1:
The patent applies local quality by positioning the measuring apparatus specifically at the inner wrist area where blood vessels are shallower and blood volume is more uniform. The watchband structure allows targeted measurement at this optimal location, improving accuracy while maintaining overall device simplicity
3Measurement precision
If optical fibers are used to transmit light through the watchband, then measurement accuracy improves, but the device structure becomes more complex
Solution Approach 1:
The patent merges the transmitting and receiving optical fibers within the watchband structure, combining multiple functions (light transmission, light collection, structural support) into a single integrated component. This reduces overall device complexity while maintaining measurement accuracy
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 smart watch achieves high accuracy in pulse information measurement by collecting data from multiple areas of the wrist, reducing errors caused by varying blood vessel depths and volumes, and providing convenient, quick, and reliable heart rate monitoring.
Implementation Method 1
The transmitting optical fiber is disposed in the watchband and is configured to have an input end and an output end. The receiving optical fiber is disposed in the watchband and is configured to have a receiving end and a transmitting end.
Data Source
AI summary
A smart watch and a method for measuring a pulse information are provided in the present disclosure. The smart watch includes a dial, a watchband, a blood vessel information collecting apparatus, and a processing apparatus. The watchband is connected with the dial. The blood vessel information collecting apparatus is disposed in the watchband and is configured to collect a blood vessel information from an inner side of a wrist of a user. The processing apparatus is connected with the blood vessel information collecting apparatus and is configured to receive and process the blood vessel information to obtain the pulse information of the user.