Movable Electrode Sensor for Gas Detection
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Solution Overview
Problem
Current sensors face challenges in enhancing detection performance, particularly in accurately detecting gas concentrations due to issues like reduced sensitivity and increased response time caused by humidity and adhesion of substances on the sensor film.
Innovation Solution
The sensor design incorporates a movable part with a first support region including a first and second electrode, where a voltage is applied between these electrodes to generate an electric field, controlling the adhesion of substances and improving detection performance by using an electric field to suppress the adhesion of substances to the sensor film, thereby enhancing sensitivity and response time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If humidity and adhesion of substances occur on the sensor film, then the sensor can detect gas concentrations, but the sensitivity is reduced and response time is increased
Solution Approach 1:
The patent applies preliminary anti-action by using a movable electrode to generate an electric field that proactively suppresses adhesion of substances to the sensor film before they can interfere with detection. The electric field creates a repulsive force that prevents substance accumulation, thereby maintaining sensor sensitivity and response time without requiring post-contamination cleaning or recalibration.
2Measurement precision
If a movable part with electrodes is added to control adhesion, then detection performance is improved, but device complexity increases
Solution Approach 1:
The movable electrode structure serves multiple functions: it acts as both a detection element for gas concentration and a control element for suppressing adhesion through electric field generation. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving improved detection performance.
Solution Approach 2:
The patent employs a movable electrode that can dynamically adjust its position and voltage application to control the electric field strength. This dynamic control allows the same component to adapt to different detection conditions and adhesion prevention requirements, reducing the need for multiple fixed components and simplifying the overall device structure.
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 effectively improves the detection performance by suppressing the adhesion of substances and maintaining the sensor's sensitivity and response time, allowing for more accurate gas concentration detection.
Implementation Method 1
a first circuit configured to perform a first operation of applying a voltage between the first electrode and the second electrode
Data Source
AI summary
According to one embodiment, a sensor includes a sensor part and a first circuit. The sensor part includes a base body, a fixed electrode fixed to the base body, a supporter fixed to the base body, and a movable part supported by the supporter. The movable part includes a movable region including a movable electrode facing the fixed electrode, and a first support region provided between the movable region and the supporter. The first support region includes a first electrode, and a second electrode insulated from the first electrode. The first circuit is configured to perform a first operation of applying a voltage between the first electrode and the second electrode.