Sensor Film Segmentation for Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sensors face challenges in accurately detecting the state of a detection target, such as gas, due to noise interference from overlapping resistance and conductive wiring, which affects the reliability of electrical resistance measurements.
Innovation Solution
The sensor design includes a first film portion with a resistance layer and a conductive layer, where the resistance wiring and conductive wiring do not overlap, and a conductive member is provided between them to suppress electromagnetic coupling and noise, ensuring a uniform temperature distribution and stable detection characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resistance wiring and conductive wiring are provided in the sensor element, then electrical connection and power supply are achieved, but noise is generated due to electromagnetic coupling between overlapping wirings
Solution Approach 1:
The sensor element is divided into distinct functional regions: a first region containing resistance wiring for electrical connection and a second region containing conductive wiring for power supply. By segmenting the wiring into separate spatial regions, electromagnetic coupling and noise generation are reduced while maintaining both electrical connection and power supply functions.
Solution Approach 2:
An insulating film is introduced as an intermediary layer between the resistance wiring and conductive wiring. This insulating film prevents direct electromagnetic coupling between the wirings, thereby reducing noise generation while allowing both wiring types to coexist in the sensor element structure.
2Measurement precision
If the film portion is in direct contact with the base, then structural support is achieved, but temperature distribution becomes non-uniform affecting detection accuracy
Solution Approach 1:
A gap is extracted or removed between the film portion and the base, eliminating the direct contact that causes non-uniform temperature distribution. This gap allows for uniform heat distribution across the film portion, improving temperature uniformity and detection accuracy without adding complex structural elements.
3Measurement precision
If the sensor operates at high temperature for detection, then detection sensitivity is improved, but noise from electromagnetic coupling increases
Solution Approach 1:
The wiring configuration is segmented into separate first and second regions, physically separating resistance wiring and conductive wiring. This spatial segmentation prevents electromagnetic coupling between the wirings even at high operating temperatures, thereby maintaining detection sensitivity while reducing electromagnetic noise interference.
Solution Approach 2:
An insulating film serves as an intermediary barrier between the resistance wiring and conductive wiring. This insulating layer prevents electromagnetic coupling and noise generation at high temperatures, allowing the sensor to operate at elevated temperatures for improved sensitivity without suffering from increased electromagnetic interference.
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
This configuration enhances the accuracy of detecting the state of the detection target by reducing noise and improving the stability of the sensor's characteristics, allowing for precise measurement of electrical resistance changes.
Implementation Method 1
a controller is configured to supply a second electric power to the first conductive layer, thereby raising a temperature of the film portion
Implementation Method 2
the first resistance layer changes an electrical resistance in response to a temperature change and a state of a detection target
Implementation Method 3
an insulating film is provided between the first resistance wiring and the first conductive wiring, thereby suppressing a noise generated by the first conductive wiring
Data Source
AI summary
According to one embodiment, a sensor includes an element portion including a first base and a first element. The first element includes, a first fixed member fixed to the first base, a first resistance connecting member supported by the first fixed member, a first conductive connecting member supported by the first fixed member, and a first film portion supported by the first resistance connecting member and the first conductive connecting member. A first gap is provided between the first base and the first film portion. The first film portion includes a first resistance layer and a first conductive layer. The first resistance connecting member includes a first resistance wiring electrically connected to the first resistance layer. The first conductive connecting member includes a first conductive wiring electrically connected to the first conductive layer.