Wireless Rescue Message Circuit With Automatic Antenna Switching
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Solution Overview
Problem
Existing vehicles often have limited antennas, making onboard SOS rescue systems ineffective in severe collisions that damage the main antenna, posing a risk to injured occupants.
Innovation Solution
A wireless communication circuit with a radio transceiver, signal amplifier, filters, and switches that automatically switches between multiple antennas to establish a cellular network connection, ensuring rescue messages can be sent even if the primary antenna is damaged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vehicle is equipped with only a main antenna for SOS rescue systems, then the device complexity is reduced, but the reliability deteriorates when the main antenna is damaged in severe collisions
Solution Approach 1:
The antenna system is segmented into multiple independent antennas (main antenna and at least one backup antenna) positioned at different locations on the vehicle. Each antenna can independently function as a transmission path, ensuring that if one antenna is damaged, others remain operational to maintain rescue message transmission capability.
Solution Approach 2:
The system dynamically switches between different antenna paths based on operational status. A control unit monitors antenna functionality and automatically activates backup antennas when the main antenna fails, creating a dynamic adaptation mechanism that maintains system reliability without requiring manual intervention.
2Reliability
If multiple antennas are added to ensure backup transmission paths, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The communication circuit is designed with multi-functional components that can serve multiple antenna paths. The same signal processing circuits, control logic, and transmission infrastructure are universally applied across all antenna paths, allowing the system to support multiple antennas without proportionally increasing overall system complexity.
Solution Approach 2:
The system pre-configures multiple antenna paths and control logic in advance, with the control unit already programmed to monitor antenna status and execute switching operations. This preliminary preparation ensures that when antenna failure occurs, the backup system is immediately activated without requiring complex real-time decision-making or additional control complexity during the emergency situation.
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
Enhances the efficiency and success rate of sending rescue messages by automatically selecting among multiple antenna paths, ensuring timely assistance in emergency situations.
Implementation Method 1
a radio transceiver (102), which converts a baseband signal to a radio frequency signal
Implementation Method 2
a signal amplifier circuit (104) electrically connected to the radio transceiver (102) for amplifying the radio frequency signal
Implementation Method 3
a plurality of filters (108-1, 108-2, 108-3, 108-4) for filtering the radio frequency signal
Data Source
AI summary
A wireless communication circuit and a transport device for sending rescue message are provided. The wireless communication circuit is arranged in a transport device for sending a rescue message to a cellular network and includes a radio transceiver, a signal amplifier circuit, a plurality of filters, and a first switch. The radio transceiver converts a baseband signal to a radio frequency signal and determines whether the cellular network has been connected. The first switch includes an input end and a plurality of output ends, and is electrically connected between the signal amplifier circuit and the plurality of filters. The first switch connects the input end and one of the plurality of output ends in sequence until the radio transceiver determines the cellular network has been connected. The wireless radio transceiver sends the rescue message through the first switch.