Wireless Thermometer Film Substrate Antenna Segmentation
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Solution Overview
Problem
Conventional deep temperature measuring devices suffer from reduced accuracy due to heat conduction through electrode patterns, and a shortened communication distance due to reduced antenna size, which affects the measurement of deep temperatures.
Innovation Solution
A wireless thermometer design featuring separate antennas for each temperature detecting means, with a heat insulator in between, and overlapping antenna regions for magnetic field coupling to enhance communication distance and accuracy, while preventing heat conduction through electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If temperature sensors are physically connected to a single antenna by an electrode pattern, then device complexity is reduced, but measurement precision deteriorates due to heat conduction through the electrode pattern
Solution Approach 1:
The patent divides the antenna system into separate antennas for each temperature sensor group (first antenna for first temperature sensor group, second antenna for second temperature sensor group). This segmentation prevents heat conduction through shared electrodes while maintaining individual measurement paths, thereby improving measurement precision without significantly increasing overall device complexity.
Solution Approach 2:
The patent introduces a heat insulator as an intermediary component between the first and second temperature sensor groups. This heat insulator blocks heat conduction paths that would otherwise exist through electrode patterns, allowing accurate deep temperature measurement while maintaining a relatively simple device structure.
2Volume of moving object
If antenna size is reduced to minimize thermometer size, then device size is improved, but communication distance deteriorates
Solution Approach 1:
The patent positions the first and second antennas in overlapping regions when viewed from the thickness direction, utilizing the third dimension (depth/thickness) to achieve magnetic field coupling. This allows compact antenna design in the planar dimensions while maintaining effective communication through vertical stacking and magnetic coupling, thus preserving communication distance despite reduced overall device size.
Solution Approach 2:
The patent employs nested positioning where the first and second antennas are disposed in overlapping regions, with one antenna effectively nested within the magnetic field region of the other. This nesting approach maximizes space utilization and maintains communication efficiency in a compact form factor.
3Ease of manufacture
If multiple temperature sensors are connected through a single antenna, then ease of manufacture is improved, but measurement precision deteriorates due to heat conduction affecting temperature difference measurements
Solution Approach 1:
The patent segments the antenna system into separate antennas for different temperature sensor groups, ensuring that heat conduction through electrodes does not affect temperature difference measurements. While this increases manufacturing steps slightly, it preserves measurement precision by creating independent measurement paths for surface and deep temperature sensors.
Solution Approach 2:
The heat insulator acts as an intermediary that blocks heat conduction between temperature sensor groups while allowing electrical connections to be made separately. This enables accurate temperature difference measurement by preventing thermal interference, while still maintaining reasonable manufacturing ease through modular assembly.
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 provides high accuracy in deep temperature measurement and extends the communication distance, allowing for reliable and precise temperature readings.
Implementation Method 1
a heat insulator having a predetermined thickness, a predetermined thermal resistivity
Implementation Method 2
antenna forming regions at least partially overlapped with each other, as viewed in the direction parallel to the thickness direction... the first antenna and the second antenna are coupled to each other by magnetic field coupling
Implementation Method 3
first temperature detecting means disposed on the first principal surface of the heat insulator... a first antenna connected to the first temperature detecting means
Data Source
AI summary
A wireless thermometer is provided, which measures a deep temperature with high accuracy and has an improved communication distance. A wireless thermometer includes a flat film-like substrate. A quartz crystal vibrator and an antenna are disposed on a principal surface of the substrate. A quartz crystal vibrator and an antenna are disposed on the other principal surface of the substrate. A winding conductor of the antenna is substantially symmetrical with a winding conductor of the antenna with respect to the substrate. A lead conductor of the antenna is connected to the winding conductor at one end and is connected to the quartz crystal vibrator at the other end. A central portion of the lead conductor is bent. By folding the central portion, the quartz crystal vibrator can be positioned opposite the quartz crystal vibrator with a heat insulator interposed there between.