Sensor Device Radio Wave Absorption Section

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Solution Overview

Problem

Microwave-based sensor devices for measuring moisture in media face accuracy degradation due to noise interference in electromagnetic waves, leading to unreliable moisture measurements.

Innovation Solution

Incorporating a radio wave absorption section in the sensor device to reduce unnecessary radiation along the transmission path, improving measurement accuracy by minimizing noise interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If a microwave scheme is used to measure moisture, then measurement speed is improved, but measurement accuracy deteriorates due to noise interference

Engineering Contradiction:
Improvemeasurement speedVSAvoidmeasurement accuracy
Core Design Contradiction:
SpeedVSMeasurement precision

Solution Approach 1:

The patent applies radio wave absorption materials to convert the harmful electromagnetic radiation into beneficial attenuation, absorbing the noise and interference along the transmission path while allowing the measurement signal to pass through, thereby improving measurement accuracy without sacrificing the speed advantage of microwave-based measurement

Inventive Principle:
Principle #22Blessing in disguise (Convert harm into benefit)

2Measurement precision

If radio wave absorption section is added to curb unnecessary radiation, then measurement accuracy is improved, but device complexity increases

Engineering Contradiction:
Improvemeasurement accuracyVSAvoiddevice complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent implements radio wave absorption sections at specific locations along the transmission path rather than throughout the entire device, placing absorption materials strategically where electromagnetic interference is most problematic, thereby improving accuracy while minimizing the increase in device complexity

Inventive Principle:
Principle #3Local quality

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 implementation of a radio wave absorption section enhances the accuracy of moisture measurements by curbing unnecessary radiation, thereby improving the reliability of the sensor device's readings.

Implementation Method 1

a radio wave absorption section that is formed in the surroundings of the transmission path

Methodology Applied
Scientific EffectRadio wave absorption: Absorption (EM radiation)

Data Source

PatentUS20230417686A1Sensor device
Publication Date: 2023.12.28 SONY GROUP CORP
  • US20230417686A1 patent drawing
  • US20230417686A1 patent drawing
  • US20230417686A1 patent drawing

AI summary

Measurement accuracy of the amount of moisture is improved by a device that measures the amount of moisture in a medium. The sensor device includes a pair of antennas, a measurement circuit, a transmission path, and a radio wave absorption section. In the sensor device which includes the pair of antennas, the measurement circuit, the transmission path, and the radio wave absorption section, the measurement circuit measures the amount of moisture in a medium between the pair of antennas. Also, the transmission path connects the pair of antennas to the measurement circuit in the sensor device. The radio wave absorption section is formed in the surroundings of the transmission path in the sensor device.