2.4G TPMS Wake-Up Circuit Without Low-Frequency Antennas
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Solution Overview
Problem
Conventional tire pressure monitoring systems require multiple antennas for signal transmission, leading to a significant burden and increased complexity, especially with four wheels, where eight antennas are needed, including both high-frequency and low-frequency types.
Innovation Solution
A 2.4G signal encoding wake-up operation tire pressure detector that uses only high-frequency signals for communication, eliminating the need for low-frequency antennas and circuits, and allowing the system to operate with a TPMS high-frequency transceiver module, reducing the number of required antennas to four high-frequency antennas per vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional tire pressure monitoring systems use both high-frequency and low-frequency antennas for signal transmission, then the system can maintain compatibility with existing communication protocols, but the number of antennas increases significantly (eight antennas for four wheels), leading to increased device complexity and installation burden
Solution Approach 1:
The patent extracts and removes the low-frequency antenna and low-frequency control circuit from the TPMS system, retaining only the high-frequency antenna and high-frequency transceiver module. This extraction eliminates the need for dual-frequency support while maintaining core functionality, directly reducing the antenna count from eight to four per vehicle.
Solution Approach 2:
The high-frequency transceiver module is designed to perform multiple functions: it serves as both the wake-up trigger receiver and the data transmission communicator. This multi-functionality replaces the separate low-frequency trigger antenna and high-frequency data antenna, allowing a single antenna type to fulfill multiple roles and reducing overall system complexity.
2Reliability
If the system uses multiple antenna types (high-frequency and low-frequency), then signal transmission can be achieved through different frequency bands, but the signal transmission burden increases significantly
Solution Approach 1:
The low-frequency antenna and its associated control circuit are completely extracted from the system. This removal eliminates the energy burden of managing dual-frequency transmission while the high-frequency transceiver handles all communication needs, reducing the overall signal transmission burden.
Solution Approach 2:
The patent merges the wake-up trigger function and data transmission function into a single high-frequency communication channel. Instead of using separate low-frequency and high-frequency channels, the system combines these functions into one unified high-frequency pathway, simplifying the transmission burden.
3Reliability
If conventional systems equip each wheel with both high-frequency and low-frequency antennas, then the system ensures comprehensive coverage for wake-up and data transmission, but the manufacturing cost and installation complexity increase
Solution Approach 1:
The low-frequency antenna and control circuit are extracted from each wheel's TPMS unit, reducing the bill of materials and simplifying the manufacturing process. This extraction maintains comprehensive coverage through the high-frequency module while lowering production costs and installation complexity.
Solution Approach 2:
The high-frequency transceiver module is designed to universally handle both wake-up signaling and data transmission functions that were previously divided between low-frequency and high-frequency components. This universality reduces the number of unique parts needed, simplifying manufacturing and installation across all four wheels.
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 simplifies antenna configurations, reduces signal transmission load, and lowers costs by eliminating the need for low-frequency antennas and circuits, making the system more efficient and cost-effective.
Implementation Method 1
The present invention utilizes a configured TPMS high-frequency transceiver module. After matching with the corresponding mobile reader that wakes up the tire pressure detector using high-frequency signals, the present invention can utilize high-frequency signals for transmission.
Data Source
AI summary
A 2.4G signal encoding wake-up operation tire pressure detector includes a first TPMS-MCU electrically connected to a first TPMS memory unit, a first TPMS communication interface, a first TPMS main controller, and a TPMS high-frequency transceiver module. The TPMS high-frequency transceiver module includes a TPMS-BLE radio frequency unit, a TPMS-OOK radio frequency unit, and a TPMS high-frequency antenna. The TPMS-BLE radio frequency unit, the TPMS-OOK radio frequency unit, and the TPMS high-frequency antenna use a shared circuit. A second TPMS-MCU is electrically connected to a second TPMS memory unit, a second TPMS communication interface, a second TPMS main controller and the first TPMS-MCU. The first TPMS-MCU and the second TPMS-MCU do not contain TPMS low-frequency circuits or TPMS low-frequency antennas, and the low frequency is less than or equal to 150 KHz. This invention eliminates the need for using both high-frequency antennas and low-frequency antennas simultaneously.