Electromagnetic Wave Detection Device Using Reflector Path Extension

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Solution Overview

Problem

Existing detection devices using electromagnetic waves struggle to accurately detect the presence and state of substances, such as gases or liquids, due to limitations in signal attenuation and noise interference, particularly when the substances are not directly interacting with the electromagnetic waves.

Innovation Solution

A detection device comprising a transmitter, a reflector, and a receiver, where the transmitter emits electromagnetic waves through a partition member to a detection region, and the reflector, formed from a material that reflects electromagnetic waves, extends the optical path, allowing the receiver to detect changes in wave strength, thereby improving accuracy and reducing noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If electromagnetic waves are emitted directly to detect substances, then the detection process is simple, but signal attenuation and noise interference reduce measurement precision

Engineering Contradiction:
Improvedetection accuracyVSAvoiddevice structure
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent introduces a reflector to create an optical path that extends the interaction distance between electromagnetic waves and substances. By folding the detection path using reflection, the system achieves longer effective path length within a compact physical footprint, thereby improving measurement precision without proportionally increasing device size

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The reflector acts as an intermediary element that extends the optical path between the electromagnetic wave source and the detector. This mediator allows the waves to interact with the substance over a longer distance, enhancing detection sensitivity and precision without requiring a direct linear arrangement

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If the optical path is extended to improve detection accuracy, then measurement precision increases, but the device size increases

Engineering Contradiction:
Improvedetection accuracyVSAvoiddevice volume
Core Design Contradiction:
Measurement precisionVSVolume of moving object

Solution Approach 1:

The reflector folds the optical path into multiple segments, transforming a long linear path into a compact multi-directional configuration. This dimensional rearrangement allows the electromagnetic waves to travel a longer effective distance while the physical device occupies less volume

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

3Measurement precision

If substances are not directly interacting with electromagnetic waves, then non-destructive measurement is achieved, but signal strength decreases leading to poor measurement precision

Engineering Contradiction:
Improvesignal detection accuracyVSAvoidsignal attenuation
Core Design Contradiction:
Measurement precisionVSLoss of energy

Solution Approach 1:

By extending the optical path through reflection, the system compensates for signal attenuation by increasing the interaction distance. The folded path allows waves to accumulate interaction with the substance over a longer effective length, maintaining sufficient signal strength for accurate detection

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The reflector enables the electromagnetic waves to continue interacting with the substance over an extended path rather than a single direct pass. This continuous interaction along the folded optical path maximizes the useful detection action while maintaining signal integrity

Inventive Principle:
Principle #20Continuity of useful action

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 device effectively detects the presence and state of substances by enhancing signal interaction and reducing noise, providing improved accuracy and reliability in non-destructive measurements.

Implementation Method 1

a transmitter configured to emit an electromagnetic wave toward a detection subject region through a partition member that partitions the transmitter and a receiver from the detection subject region

Methodology Applied
Scientific EffectElectromagnetic wave emission: Electromagnetic Induction

Implementation Method 2

a reflector arranged in an optical path of an electromagnetic wave emitted from the transmitter and configured to reflect the electromagnetic wave transmitted through at least part of the detection subject region

Methodology Applied
Scientific EffectElectromagnetic wave reflection: Reflection

Implementation Method 3

a receiver configured to receive the electromagnetic wave reflected by the reflector

Methodology Applied
Scientific EffectElectromagnetic wave detection: Electromagnetic Induction

Data Source

PatentUS20240230393A9Detection device and detection method
Publication Date: 2024.07.11 ROHM CO LTD
  • US20240230393A9 patent drawing
  • US20240230393A9 patent drawing
  • US20240230393A9 patent drawing

AI summary

This detection device is provided with a transmission unit that generates electromagnetic waves, a compartment bottom portion by which electromagnetic waves are reflected, and a reception unit that receives electromagnetic waves. The transmission unit emits electromagnetic waves to a detection target region through a partition member for partitioning the detection target region from the transmission unit and the reception unit. The compartment bottom portion is provided on the optical path of the electromagnetic waves emitted from the transmission unit and reflects electromagnetic waves having passed through at least a portion of the detection target region. The reception unit receives electromagnetic waves that have been reflected by the compartment bottom portion and are inputted from the detection target region through the partition member.