Gas Sensor Operating Mode API for Selective Detection
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Solution Overview
Problem
Current portable devices equipped with gas sensors lack the ability to selectively measure a variety of gases, as existing sensors are not very selective and often require multiple sensors or specific operating conditions to distinguish between different gases or gas groups.
Innovation Solution
A method and device that provide a list of operating modes through an API, allowing applications to control and process gas sensor data, including temperature profiles and data processing algorithms, enabling selective detection of individual gases or gas mixtures and analysis of gas compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single gas sensor is used in portable devices, then device complexity is reduced, but the ability to selectively detect different gases is insufficient
Solution Approach 1:
The patent applies parameter changes by varying the operating temperature of the metal-oxide gas sensor to achieve selective detection of different gases. The control unit adjusts the heater current to maintain different target temperatures based on the selected operating mode, enabling a single sensor to detect multiple gas types (alcohol, CO, benzene, odors) without requiring multiple sensors.
2Measurement precision
If multiple gas sensors are combined to distinguish between different gases, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by designing a single gas sensor system that can perform multiple detection functions. Through the application programming interface, users can select different operating modes (alcohol detection, CO detection, benzene detection, odor detection), and the control unit adjusts the sensor's operating parameters accordingly, allowing one sensor to replace what would traditionally require multiple specialized sensors.
3Ease of operation
If a fixed temperature profile is used for gas sensor operation, then ease of operation is improved, but adaptability to detect different gases deteriorates
Solution Approach 1:
The patent applies dynamics by making the sensor operating temperature adjustable rather than fixed. The control unit dynamically changes the heater current and target temperature based on the selected operating mode. This dynamic temperature adjustment enables the system to adapt to different gas detection requirements while maintaining simple operation through pre-configured modes accessible via the API.
Data Source
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AI summary
In order to allow application programs access to a gas sensor, a versatile mechanism is provided that allows to provide a flexible sensor control through a simple, fixed API. The mechanism is designed to let the application program query the possible operating modes of the gas sensor. The operating modes e.g. specify the methods for controlling the gas sensor and for processing its raw data. The mechanism is particularly suitable for controlling a plurality of gas sensors integrated into a mobile device, such as a mobile phone, and for adapting the processing of the sensor data based on the operating mode currently run by the mobile device.