Radar Power Loss Reduction Under Cover

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Solution Overview

Problem

Radar power loss occurs due to heat and interference between emitted and reflected radio waves when a radar is mounted under a cover, such as a bumper, leading to variations in energy loss and object measurement performance, and potential damage from vibrations or impacts.

Innovation Solution

A method and system that monitor and adjust the positional relationship or frequency of the radar's measurement radio wave to minimize power loss by determining optimal installation positions and frequencies, using a controller and power meter to extract values that reduce power loss through the cover.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the radar is mounted under the cover, then the radar is protected from external impacts, but power loss of emitted radio waves occurs due to heat and interference

Engineering Contradiction:

Improveprotection from external impactsVSAvoidpower loss of emitted radio waves

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies preliminary action by determining the optimal positional relationship between the radar and cover before final installation. Through preliminary measurement and adjustment of the distance d, the system establishes the best configuration that minimizes power loss while maintaining protection, thereby resolving the contradiction between protection and energy efficiency

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs parameter changes by systematically varying the distance d between the radar antenna surface and the cover inner surface. By changing this physical parameter and measuring the corresponding power loss, the invention identifies the optimal distance that reduces energy loss while maintaining the protective function of the cover

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the radar is commonly placed on the inner surface of the cover, then variations in object measuring performance are reduced, but the cover vibration and impact may damage the radar

Engineering Contradiction:

Improveobject measuring performanceVSAvoidradar damage from vibration and impact

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-determining the optimal installation position of the radar on the cover's inner surface. Through preliminary measurement and optimization of the positional relationship, the system establishes a configuration that ensures consistent object measurement performance while avoiding positions that would be vulnerable to vibration and impact damage

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces the distance d as an intermediary parameter between the radar and cover. This intermediate space allows the radar to maintain a stable positional relationship with the cover for consistent measurement performance, while also providing buffer space that reduces the direct transmission of vibrations and impacts to the radar

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of energy

If the distance between the antenna surface and the cover is changed, then power loss varies due to standing wave changes, but it requires complex adjustment to find optimal position

Engineering Contradiction:

Improvepower loss variationVSAvoidadjustment complexity

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The patent applies self-service by enabling the radar system to automatically measure and determine its own optimal positional relationship with the cover. The radar transmits measurement radio waves and monitors the reflected waves to self-evaluate the power loss at different distances, thereby autonomously identifying the optimal configuration without requiring complex external adjustment equipment or procedures

Inventive Principle:

Principle #25Self-service

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 effectively reduces power loss and enhances radar performance by optimizing the positional relationship and frequency of the radar's operation, minimizing the impact of standing waves and ensuring reliable object detection while protecting the radar from external impacts.

Implementation Method 1

causing the radar to transmit a measurement radio wave, and monitoring power of the measurement radio wave transmitted from the radar through the cover

Methodology Applied

Scientific EffectElectromagnetic wave transmission: Electromagnetic Induction

Implementation Method 2

the variations in the energy loss due to the distance between the antenna surface of the radar and the cover are believed to be caused by variations in a standing wave generated between the cover and the antenna surface of the radar

Methodology Applied

Scientific EffectStanding wave interference: Interference

Data Source

PatentUS7852258B2Method and system for reducing power loss of transmitted radio wave through cover

Publication Date: 2010.12.14 DENSO CORP

AI summary

In a power-loss reducing system, a transmitting unit causes a radar to transmit a measurement radio wave, and a power monitoring unit monitors power of the measurement radio wave transmitted from the radar through a cover while changing a positional relationship between the cover and the radar. An extracting unit extracts a value of the changed positional relationship between the cover and the radar based on a result of the monitoring of the power such that the extracted value of the positional relationship allows reduction of power loss of a radar wave transmitted, through the cover, from the radar located based on the extracted value of the positional relationship.