Odor Measurement Chamber With Valve Control for Stable Sensing
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Solution Overview
Problem
Conventional odor sensors suffer from low sensing accuracy, durability issues, and sensitivity to ambient conditions, leading to inaccurate and unstable odor data measurement in vehicles and industrial sites.
Innovation Solution
A system and method involving an odor measurement chamber with inlet and outlet valves controlled by a controller to confine gas when odor data variation exceeds a reference value, allowing for accurate acquisition of odor data by an odor sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional odor sensors are used for measuring odors in vehicles and industrial sites, then odor sensing can be performed, but the sensing accuracy is low and the measurement precision deteriorates
Solution Approach 1:
An odor measurement chamber is introduced as an intermediary device between the odor source and the sensor. The chamber confines the odor components and allows them to be uniformly distributed before reaching the sensor, thereby improving measurement precision without compromising sensor durability. The chamber acts as a mediator that prepares the odor sample in a controlled environment.
Solution Approach 2:
The system changes the physical parameters of the odor measurement environment by controlling temperature, humidity, and gas flow within the chamber. By maintaining stable parameters and allowing odor components to reach uniform distribution, the sensing accuracy is improved while the sensor itself remains protected from harsh conditions that would reduce its durability.
2Measurement precision
If odor data is acquired at predetermined time intervals or as average values, then continuous monitoring is possible, but the measurement precision deteriorates because odor components are not uniformly distributed
Solution Approach 1:
The system performs preliminary action by allowing odor components to be injected into the chamber and uniformly distributed before the actual measurement is taken. This pre-conditioning of the sample ensures that when measurement occurs, the odor components are already in an optimal state for accurate sensing, eliminating the need for repeated measurements over time.
Solution Approach 2:
The system uses periodic action by controlling the injection and confinement of odor components in cycles. Gas is injected into the chamber, allowed to distribute uniformly, measured, and then refreshed. This periodic process ensures that each measurement is taken under optimal conditions of uniform distribution, improving precision without requiring continuous monitoring.
3Measurement precision
If biopeptide-type sensors or amino acid sensors are used for precise sensing response, then sensing accuracy is improved, but the sensors become excessively sensitive to ambient temperature and humidity
Solution Approach 1:
The system controls and stabilizes the ambient parameters within the odor measurement chamber, maintaining constant temperature and humidity levels. By changing the environment from uncontrolled ambient conditions to a regulated chamber environment, the high sensitivity of biopeptide sensors to temperature and humidity is mitigated, allowing them to function accurately.
Solution Approach 2:
The odor measurement chamber creates a controlled, inert environment that isolates the sensitive biopeptide sensors from harmful ambient variations in temperature and humidity. The chamber acts as a protected space where the only variable is the odor being measured, while environmental parameters are held constant, enabling the sensors to operate at their full precision potential.
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 stable and accurate odor data acquisition by ensuring uniform distribution of odor components within the chamber, improving measurement precision and consistency.
Implementation Method 1
an odor sensor disposed in the odor measurement chamber to sense an odor of a gas injected into the odor measurement chamber
Data Source
AI summary
In one embodiment, a system can be used for measuring odor data. The system includes an odor measurement chamber having a gas inlet and a gas outlet located at respective end portions of the odor measurement chamber. An inlet valve is mounted in the gas inlet and an outlet valve is mounted in the gas outlet. An odor sensor is disposed in the odor measurement chamber. A controller is configured to monitor first odor data of gas injected into the odor measurement chamber for a sensing time period of the odor sensor, to control the inlet valve and the outlet valve to close in response to a variation in the monitored first odor data being equal to or greater than a reference value, and then to acquire second odor data of the gas sensed by the odor sensor as actual odor data.