Microwave Moisture Sensor Power Adjustment Against Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Sensor devices using microwave technology for moisture measurement are prone to performance degradation due to electromagnetic noise interference, affecting measurement accuracy.
Innovation Solution
A sensor device with a transmitter and receiver configuration that adjusts electric power based on reception signals, using variable attenuators and amplifiers to control transmission signals, and includes a sensor control unit for parameter measurement after power adjustment, allowing for stepped amplitude control and error detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If microwave type measurement is used to achieve high speed measurement, then measurement speed is improved, but measurement accuracy deteriorates due to electromagnetic noise interference
Solution Approach 1:
The patent applies preliminary action by adjusting the electric power of the transmission signal before performing the moisture measurement. The sensor control unit controls the transmitter to output a transmission signal with electric power adjusted based on reception signals from previous measurements, thereby preparing optimal measurement conditions in advance to ensure both high speed and high accuracy without suffering from electromagnetic noise interference during the actual measurement process
2Reliability
If high electric power transmission signal is used to improve signal strength, then signal reception quality is improved, but noise interference increases affecting measurement accuracy
Solution Approach 1:
The patent applies dynamics by making the electric power of the transmission signal adjustable and adaptable rather than fixed. The sensor control unit dynamically controls the transmitter to output transmission signals with varying electric power levels based on the reception signals, allowing the system to optimize the balance between signal strength and noise interference for each measurement condition, thereby improving signal reception quality while minimizing harmful noise effects
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
Improves moisture measurement accuracy by mitigating noise interference and ensuring timely and accurate parameter measurement.
Implementation Method 1
a sensor device measuring an amount of moisture in a medium on the basis of results of transmission/reception of electromagnetic waves that have propagated through a medium between one pair of probes
Data Source
AI summary
In a device that measures an amount of moisture in a medium, performance of the device is improved. A sensor device includes a transmitter, a receiver, and a sensor control unit. In this sensor device, a transmitter supplies a transmission signal to a transmission antenna. In addition, in the sensor device, a receiver receives a reception signal corresponding to the transmission signal through a reception antenna. In the sensor device, before measuring a predetermined parameter on the basis of the reception signal, the sensor control unit adjusts electric power of the transmission signal on the basis the reception signal.