Combined Detector for Simultaneous pH and Light Sensing
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Solution Overview
Problem
Existing detectors fail to simultaneously detect light and pH distributions accurately when monitoring moving objects, such as stirred microbe and fluid mixtures, due to asynchronous detection times, leading to inaccurate results.
Innovation Solution
A combined detector system with a chemical and physical phenomenon detecting system and an energy beam detecting system, utilizing semiconductor charge generating sections and charge storage sections to store charges corresponding to pH values and light intensity simultaneously, with a buried channel layer and synchronized charge supply and transfer mechanisms to ensure simultaneous detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If charge accumulation time is extended to improve S/N ratio, then detection sensitivity improves, but detection timing synchronization deteriorates
Solution Approach 1:
The detector is divided into two independent detection systems: a pH detection system and a light detection system. Each system has its own charge storage section and can accumulate charges independently at different rates. This segmentation allows the pH detector to accumulate charges for longer periods to improve S/N ratio while the light detector captures light distribution simultaneously, resolving the timing synchronization issue.
Solution Approach 2:
The patent combines two different detection systems (pH detection and light detection) into a single integrated detector with a shared sensing section. Both systems use the same semiconductor substrate and sensing region, allowing them to detect different parameters simultaneously from the same location without temporal delays, thus maintaining timing synchronization while enabling independent charge accumulation for each detection type.
2Device complexity
If single detector alternately detects pH and light, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The single detector is segmented into two independent detection pathways: one for pH detection and one for light detection. Each pathway has its own charge storage section (first charge storage section for pH, second charge storage section for light) that operates independently. This allows simultaneous detection of both parameters with high precision while maintaining relatively simple device structure by sharing common components like the sensing section and semiconductor substrate.
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
Enables precise and simultaneous detection of pH and light distributions, improving the accuracy of detecting moving objects by storing and reading out charges efficiently, allowing for continuous monitoring of both chemical and physical phenomena.
Implementation Method 1
a first sensing section changed in potential depending on chemical and physical phenomenon, a first charge supply section for supplying a first charge to the first sensing section... the first sensing section including a semiconductor charge generating section for generating the first charge and a second charge by receiving energy beam including light
Data Source
AI summary
A combined detector capable of simultaneously detecting both a value indicating a physical/chemical phenomenon such as a pH value and the intensity of an energy beam such as light. The combined detector comprises a physical/chemical phenomenon detecting system (10) and an energy beam detecting system. The physical/chemical phenomenon detecting system (10) has a sensing section (21) whose potential varies with a physical/chemical phenomenon, a charge supply section (22) for supplying first charge to the sensing section, a charge supply control section (23) provided between the sensing section (21) and the charge supply section (22), a first charge storage section (26) for storing the first charge transferred from the sensing section (21), and a charge transfer control section (27) provided between the sensing section (21) and the first charge storage section (26). The sensing section (21) includes a semiconductor charge generating portion (15) for generating the first charge and second charge when receiving an energy beam such as light. The energy beam detecting system has the semiconductor charge generating portion (15) and a second charge storage section (31) adapted to store the second charge generated by the semiconductor charge generating portion (15) and having an opposite potential to the first charge storage section (26) with respect to the sensing section (21).