Vehicle Ranging Sensor Interference Avoidance via Wireless Timing
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Solution Overview
Problem
Existing vehicle-mounted electromagnetic wave ranging sensors face issues with misrecognizing transmission waves from other vehicles as reflected waves, leading to incorrect distance measurements, particularly in scenarios where vehicles are oncoming or navigating around curves.
Innovation Solution
A vehicle-mounted device equipped with a first electromagnetic wave ranging sensor and a wireless communication device that receives transmission time frame information from another vehicle, allowing for interference determination and control of transmission and reception timing to avoid interference states, thereby preventing misrecognition of transmission waves as reflected waves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electromagnetic wave ranging sensor continuously transmits waves and receives reflected waves to measure distance, then the distance measurement function is maintained, but transmission waves from other vehicles may be misrecognized as reflected waves causing incorrect measurements
Solution Approach 1:
The system uses wireless communication to receive transmission time frame information from other vehicles and feeds this information back to the control unit. The control unit then uses this feedback to adjust reception timing and avoid misrecognizing other vehicles' transmission waves as reflected waves, thereby maintaining measurement accuracy while continuously operating the ranging sensor.
Solution Approach 2:
The system performs preliminary actions by receiving transmission time frame information from other vehicles before potential interference occurs. The control unit uses this advance information to predeterminedly adjust the reception timing window, preventing misrecognition of other vehicles' transmission waves as reflected waves before the interference can occur.
2Speed
If the ranging sensor operates continuously to maintain real-time distance measurement, then the responsiveness is improved, but the likelihood of receiving transmission waves from other vehicles increases
Solution Approach 1:
The system dynamically adjusts the reception timing window based on real-time transmission time frame information received from other vehicles. The control unit continuously monitors and modifies the reception timing to avoid interference while maintaining continuous ranging operation, allowing the system to adapt its reception pattern dynamically without reducing responsiveness.
Solution Approach 2:
The control unit receives transmission time frame information from other vehicles via wireless communication and uses this feedback to continuously adjust the reception timing. This feedback mechanism allows the system to maintain real-time distance measurement while actively avoiding interference from other vehicles' transmission waves.
3Measurement precision
If the system adjusts transmission and reception timing to avoid interference from other vehicles, then measurement accuracy is improved, but the device complexity increases due to wireless communication and control functions
Solution Approach 1:
The wireless communication device and control unit serve multiple functions: they receive transmission time frame information from other vehicles, process this information to determine interference conditions, adjust reception timing to avoid interference, and maintain continuous distance measurement. This multi-functionality reduces the need for separate dedicated components for each function.
Solution Approach 2:
The patent combines the wireless communication function, interference determination function, and reception timing control function into an integrated system. The control unit centralizes the coordination of transmission timing, reception timing, and interference avoidance, merging multiple control functions into a single coordinated system rather than separate independent components.
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 effectively reduces the likelihood of transmission waves being misrecognized as reflected waves, enhancing the accuracy of distance measurements even in complex vehicle positional relationships.
Implementation Method 1
a first electromagnetic wave ranging sensor that successively transmits a first transmission wave as an electromagnetic wave, receives a first reflected wave produced when the first transmission wave is reflected off an object
Implementation Method 2
a first wireless communication device that receives transmission time frame information indicating a time frame when a second electromagnetic wave ranging sensor that is a ranging sensor mounted on a second vehicle and transmits a second transmission wave
Data Source
AI summary
A vehicle-mounted device includes an interference determination unit and a sensor control unit. The interference determination unit determines whether an interference state where a first electromagnetic wave ranging sensor equipped to a first vehicle may receive a second transmission wave transmitted from a second electromagnetic wave sensor equipped to a second vehicle is present, based on transmission time frame information received by a first wireless communication device equipped to the first vehicle, and reception duration information indicating a reception duration during which a first electromagnetic wave ranging sensor equipped to the first vehicle may receive a first reflected wave. The sensor control unit controls transmission timing for transmitting the first transmission wave from the first electromagnetic wave ranging sensor and a reception duration, and changes the transmission timing and the reception duration to avoid the interference state, when the interference determination unit determines that the interference state is present.