Auxiliary Doppler Radar for Vehicle Speed Detection
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Solution Overview
Problem
Speed detection radar systems used to detect other vehicles' speeds also detect the speed of the vehicle they are installed in, but noise and operational limitations hinder this capability.
Innovation Solution
A system comprising an exterior housing with a Doppler radar unit and wireless transceiver to detect the relative speed of a road surface, transmitting data to a vehicle's internal system for accurate speed determination, which includes an accelerometer for activation and power cycling, and a controller for data processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radar system is used to detect the speed of the vehicle it is installed in, then speed detection capability is provided, but noise and operational limitations reduce measurement accuracy
Solution Approach 1:
The system divides the speed detection function into two separate components: an internal radar system for detecting other vehicles and an external auxiliary radar unit for detecting the host vehicle's speed. This segmentation isolates the speed detection function from the main radar system, preventing noise from the main system from interfering with accurate speed measurement.
Solution Approach 2:
The external auxiliary radar unit acts as an intermediary device that independently measures the host vehicle's speed by detecting the relative speed of the road surface. This intermediary system provides clean, noise-free speed data that is then transmitted to the internal system, resolving the contradiction between providing speed detection and avoiding noise interference.
2Measurement precision
If an external auxiliary radar unit is added to detect vehicle speed, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The speed detection function is extracted from the main radar system and placed into a separate external auxiliary unit. This extraction allows the main system to remain simple while the external unit handles the specialized speed measurement task, minimizing the impact on overall system complexity.
Solution Approach 2:
The external auxiliary radar unit serves multiple functions: it detects the relative speed of the road surface, determines the host vehicle's speed, and transmits this data to the internal system. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
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 system provides accurate vehicle speed detection independent of the vehicle's radar signals, improving the operation of main radar speed detection units and reducing noise interference.
Implementation Method 1
A Doppler radar unit contained within the exterior housing is configured to detect a relative speed of a road surface
Data Source
AI summary
A system for detecting a vehicle speed, comprising an exterior housing configured to be secured to an exterior surface of a vehicle. A Doppler radar unit contained within the exterior housing and configured to detect a relative speed of a road surface. A wireless transceiver contained within the exterior housing and coupled to the Doppler radar unit, the wireless transceiver configured to transmit data representing the relative speed of the road surface to a system inside of the vehicle that includes a display.