Multi-Electrode Sensing Array With Dynamic Reference Voltage Control
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Solution Overview
Problem
Existing sensing electronic devices are limited to single sensing of one type of to-be-tested object, requiring repeated replacement and operation, which is inconvenient and reduces the service life due to adsorption of objects on the sensing electrode.
Innovation Solution
A sensing electronic device with a substrate and a sensing array comprising multiple sensing electrodes and reference electrodes, where different reference voltages are applied to detect multiple objects simultaneously, and a controller adjusts voltages to facilitate desorption, extending electrode life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single sensing electrode is used to detect one type of object, then the detection is simple and reliable, but the device cannot detect multiple objects simultaneously and requires repeated replacement
Solution Approach 1:
The sensing electrode is divided into multiple independent sensing areas (first sensing area, second sensing area, third sensing area, fourth sensing area), each capable of detecting different types of objects. This segmentation allows the device to detect multiple objects simultaneously without requiring physical replacement of electrodes.
Solution Approach 2:
The sensing array is designed to perform multiple detection functions using a single integrated structure. Each sensing area can detect different objects (first object, second object, third object) by applying different reference voltages, making the device universal and eliminating the need for repeated replacement.
2Productivity
If the sensing electrode is used repeatedly to detect different objects, then the operation time increases, but the objects are adsorbed to the sensing electrode surface and difficult to desorb, shortening service life
Solution Approach 1:
The reference voltage is made dynamic and adjustable for each sensing area. By dynamically changing the reference voltage applied to each sensing area, the device can optimize detection conditions for different objects and facilitate desorption, preventing accumulation and extending electrode service life.
Solution Approach 2:
Different reference voltages are applied to different sensing areas based on the detection requirements. By changing the voltage parameter, the device can effectively detect different objects and control the adsorption/desorption process, maintaining electrode performance over repeated use.
3Loss of time
If multiple sensing electrodes are used to detect multiple objects, then simultaneous detection is enabled, but the voltage control complexity increases
Solution Approach 1:
The voltage control system is segmented to provide independent reference voltages to each sensing area. This segmentation allows precise control of each sensing area's detection conditions while maintaining overall system manageability through modular voltage control.
Solution Approach 2:
The system controls multiple sensing areas by changing voltage parameters rather than physical configurations. By adjusting reference voltages electronically, the device achieves complex multi-object detection without proportionally increasing physical control complexity.
Data Source
AI summary
A sensing electronic device includes a substrate, and a reference voltage control unit. The sensing array is arranged on the substrate, and includes a first sensing electrode and a second sensing electrode. The reference voltage control unit is electrically connected to the sensing array. In an operation period, the reference voltage control unit has a first voltage, the first sensing electrode has a second voltage, and the second sensing electrode has a third voltage, wherein a difference between the first voltage and the second voltage is different from a difference between the first voltage and the third voltage.