Ceramic Bluetooth Probe Antenna for High-Temperature Stability
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Solution Overview
Problem
Current temperature measuring probes with BLUETOOTH® connectivity suffer from unstable FPC antenna performance under high temperatures, leading to a short service life.
Innovation Solution
The use of a ceramic antenna within the probe, combined with a shielding tube and anti-disengagement buckle, to ensure high temperature resistance and stability, along with a separate charging line configuration to maintain signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a FPC antenna is used in the temperature measuring probe, then the device can achieve Bluetooth connectivity and signal transmission, but the antenna performance becomes unstable under prolonged high temperature conditions and the service life is shortened
Solution Approach 1:
The patent changes the material parameter of the antenna from FPC (flexible printed circuit) material to ceramic material. This parameter change enables the antenna to withstand high temperatures (up to 200°C or higher) without performance degradation, directly resolving the instability issue under prolonged high temperature conditions and extending the service life of the temperature measuring probe.
2Device complexity
If the antenna is placed inside the needle tube and handle, then the device structure is compact, but the antenna may be affected by electromagnetic interference from surrounding components
Solution Approach 1:
The patent introduces a shielding tube as an intermediary component between the ceramic antenna and the surrounding environment. This shielding tube, typically made of conductive material, blocks electromagnetic interference from other components while allowing the antenna to remain compact inside the needle tube and handle assembly.
3Temperature
If the handle is made of ceramic material with poor shielding effect, then the handle provides good thermal insulation, but it may interfere with the antenna signal reception and transmission
Solution Approach 1:
The patent segments the handle structure into different functional zones: the main handle body remains ceramic for thermal insulation, while a specific portion (the shielding tube) is made of conductive material to provide electromagnetic shielding. This segmentation allows both thermal insulation and signal protection functions to coexist without compromising either performance.
Data Source
AI summary
The present application relates to a Bluetooth temperature measuring probe including a needle tube, a handle, a first temperature sensor and a PCB board, in which the first temperature sensor and the PCB board are both provided in the needle tube; the handle is fixedly connected to the needle tube at a tail end thereof; the Bluetooth temperature measuring probe further includes a ceramic antenna provided inside the needle tube and the handle and having a head end extending into the needle tube and being electrically connected to the PCB board and a tail end extending into the handle to receive and transmit a signal, so as to realize an antenna function.