Formaldehyde Concentration Measurement with Temperature-Humidity Compensation
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Solution Overview
Problem
Existing formaldehyde sensors experience measurement errors due to variations in temperature and humidity, leading to inaccuracies in formaldehyde concentration readings.
Innovation Solution
A method and apparatus that compensates for temperature and humidity variations by calculating formaldehyde concentration compensation values based on environmental data, and adjusts initial readings to improve accuracy, and includes zero-point calibration based on operating parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If formaldehyde sensor is used to measure formaldehyde concentration in different environments, then measurement coverage is improved, but measurement precision deteriorates due to temperature and humidity variations
Solution Approach 1:
The patent applies parameter changes by introducing temperature and humidity compensation values to adjust the formaldehyde concentration reading. The processor calculates compensation values based on detected temperature and humidity parameters, then adds these to the initial reading to produce a corrected concentration value, thereby maintaining measurement precision across different environmental conditions
Solution Approach 2:
The patent implements feedback by using temperature and humidity sensors to continuously monitor environmental conditions and feed this information back to the processor. The processor then calculates appropriate compensation values based on this feedback and adjusts the formaldehyde concentration reading accordingly, creating a closed-loop system that maintains accuracy
2Measurement precision
If temperature and humidity compensation is implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a processor that performs multiple functions: it processes formaldehyde sensor data, temperature sensor data, and humidity sensor data, then integrates all this information to produce a corrected formaldehyde concentration reading. This multi-functional approach consolidates complexity into a single processing unit rather than requiring separate systems for each function
Solution Approach 2:
The patent uses temperature and humidity compensation values as intermediaries between the raw environmental sensor data and the final formaldehyde concentration reading. These compensation values mediate the relationship between environmental conditions and measurement accuracy, simplifying the overall system architecture by introducing intermediate calculation steps
Data Source
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AI summary
The present disclosure relates to a formaldehyde concentration measurement method and apparatus, and an air purifier. The formaldehyde concentration measurement method includes: determining an initial formaldehyde concentration value measured by a formaldehyde sensor; acquiring temperature information and/or humidity information of an environment surrounding the formaldehyde sensor; determining a formaldehyde concentration compensation value of the formaldehyde sensor according to the temperature information and/or the humidity information; determining a target formaldehyde concentration value of the formaldehyde sensor according to the formaldehyde concentration compensation value and the initial formaldehyde concentration value. According to the formaldehyde concentration measurement method, errors of the formaldehyde concentration value measured by the formaldehyde sensor in different temperature and humidity environments can be reduced, thereby improving the measurement accuracy of the formaldehyde sensor.