UV-LED Ozone Sensor for Liquid Measurement
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Solution Overview
Problem
Existing gas concentration measurement devices are not optimized for conveniently and rapidly measuring low ozone concentrations, and they struggle to measure ozone concentrations over a wide range effectively.
Innovation Solution
The apparatus employs an ultraviolet light emitting diode (UV-LED) as a point source emitter generating a parallel beam of light, paired with a solar-blind UV photodiode detector, within a bounded volume to measure ozone concentration in liquids, using UV-LEDs emitting radiation around 260 nanometers and UV sensors insensitive to solar radiation, allowing for efficient detection of ozone concentrations through radiation absorption analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional gas concentration measurement devices are used, then they can detect various types of gases including ozone, but they are not optimized for conveniently and rapidly measuring low ozone concentrations
Solution Approach 1:
The patent changes the optical parameters by using UV-LEDs emitting at specific wavelengths (254nm, 280nm, 300nm) that match ozone's absorption characteristics, and adjusts the path length parameter (1cm, 5cm, 10cm, 20cm, 50cm, 100cm) to optimize the balance between measurement precision for low concentrations and measurement speed for high concentrations
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the system to switch between different UV-LED wavelengths and path lengths based on the measured ozone concentration level, enabling rapid measurement for high concentrations while maintaining precision for low concentrations
2Adaptability or versatility
If conventional measurement devices are used, then they can measure ozone concentrations, but measuring the ozone concentration over a wide range of concentrations using the same device is difficult
Solution Approach 1:
The patent segments the measurement range into different concentration levels (low, medium, high) and assigns different UV-LED wavelengths and path lengths to each segment, allowing the device to handle a wide range of concentrations effectively
Solution Approach 2:
The patent creates a universal measurement system that can measure ozone concentrations across a wide range (from very low to very high concentrations) by integrating multiple UV-LEDs with different wavelengths and multiple path length options into a single device
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
This configuration enables accurate and rapid measurement of ozone concentrations, both low and high, by minimizing background interference and maximizing light collection, facilitating real-time monitoring and control in various applications.
Implementation Method 1
Ozone is known to strongly absorb light in the short wavelength ultra-violet region of the spectrum, sometimes referred to as UV-C radiation
Implementation Method 2
a detector, the detector comprising an ultraviolet light sensor (UV sensor)
Data Source
AI summary
An apparatus includes an emitter, the emitter comprising an ultraviolet light emitting diode (UV-LED) and being disposed on a first end of a bounded volume suitable for holding a liquid. The liquid may have a negative Langelier saturation index (LSI). The bounded volume can be a chamber, a tank, or the like. The apparatus includes a detector, the detector comprising an ultraviolet light sensor (UV sensor) and being disposed on a second end of the bounded volume, the second end being opposite the first end, wherein the UV-LED comprises a point source, and wherein the emitter generates a parallel beam of light.