An apparatus for monitoring UV radiation exposure and notifying a user of a risk of overexposure is disclosed. The apparatus receives physical characteristic input for a user, as well as a current UV radiation level and an exposure time for at least one area of the user's body. Body mapping data is generated, and a UV exposure risk for each area is assessed based on the input and the body mapping data. A threshold UV radiation exposure value for each area is determined based on the UV exposure risk. A current UV radiation exposure value is determined based on the current UV radiation level input. The current UV radiation exposure value is compared to the threshold UV radiation exposure value to generate UV radiation exposure data. The user is notified of a remaining time for UV radiation exposure based on the UV radiation exposure data.

According to an aspect, a UV radiometer is provided. The UV radiometer includes a sensor assembly and a sensor controller. The sensor assembly includes a UV sensor element and a temperature sensing component configured to perform a thermal adjustment of a sensed UV input from the UV sensor element to produce a compensated UV signal. The sensor controller includes a signal conditioning circuit configured to receive the compensated UV signal from the sensor assembly and produce a conditioned and compensated UV signal. The sensor controller also includes a communication interface configured to transmit the conditioned and compensated UV signal to a UV process controller.

Disclosed is a device that will take radiometric images of the shortwave spectrum from 0.2-2 m, which can then be processed into a spherical panoramic image. This single source of data can then be used to produce a wide range of functional outputs for radiative energy analysis, from architectural performance and thermal comfort analysis to replacing the array of sensors required to make specific biometeorological measurements, such as Global Horizontal Irradiance (GHI), Direct Normal Irradiance (DNI), Diffuse Horizontal Irradiance (DHI), Sky View Factor (SVF), and/or Global Tilted Irradiance (GTI). The data is also combined with a longwave array detector to produce full-spectrum radiative energy measurements.

A skin-attaching sheet including an attaching portion configured for attaching to skin. The attaching portion includes a color-changeable layer that changes color following exposure to ultraviolet rays, and the attaching portion has a color difference (E*ab) in an L*a*b* color system between before exposure and 10 seconds after exposure of 5 or more and 300 or less in a standard exposure test in which the attaching portion is exposed to ultraviolet rays in a moist state.

A gas turbine engine fuel system includes a fuel delivery system, an oil cooling subsystem, a fuel delivery conditioning system, and one or more optical coking sensors. The fuel delivery subsystem delivers fuel to a gas turbine engine and the oil cooling subsystem receives heated oil from the gas turbine engine. The fuel delivery conditioning system includes a fuel/oil cooler that is in fluid communication with the fuel delivery subsystem to receive the fuel and is in fluid communication with the oil cooling subsystem to receive the heated oil. The fuel/oil cooler transfers heat from the oil to the fuel to increase a temperature of the fuel, and the optical coking sensors output a signal indicating a thermal stress of the fuel that occurs with a changing temperature of the fuel. A controller receives the voltage signal determines an onset of coking in the fuel based on the signal.

A wearable device detects ambient ultraviolet light and provides output related to lengths of time for safe exposure and health benefits. Orientations of the device, determined by an orientation sensor, intensity of ambient light determined by ultraviolet and visible light sensors, or both are used to determine a current position of the sun or other source of ultraviolet light. Data from the sensors and position of the sun are used to select a gain level for the ultraviolet light sensor or a corrective factor to be applied to signals from the ultraviolet light sensor. At a subsequent time, detected intensity of ambient ultraviolet light may be used in combination with external data relating to the location of the device to determine an output, such as recommended times for exposure. Other sensors may determine physiological characteristics of the user, which may also be used to determine personalized recommended exposure times.

Systems, apparatus, articles of manufacture, and methods for corrosion detection are disclosed. An example apparatus includes an adhesive to removably couple the apparatus directly to a region of a substrate; a first sensor to measure a first parameter at the region; a second sensor to measure a second parameter at the region, the first parameter and the second parameter being factors of corrosion at the region; and a power supply to provide power to the first sensor and the second sensor.

Techniques for producing an optical fiber sensor and for monitoring ultraviolet (UV) light and temperature using the optical fiber sensor are described. The optical fiber sensor can include a temperature-sensitive resin and a UV-sensitive resin. The temperature-sensitive resin can include a thermochromic powder and a polymer resin. The UV-sensitive resin can include a UV-sensitive powder and the polymer resin. Additionally, a data acquisition system can be electrically coupled to the optical fiber sensor for detecting an output signal from the optical fiber sensor and for determining a temperature or a level of UV light based on the output signal.

The present disclosure relates to a curvature-based signal segmentation method for solar-blind ultraviolet (UV) photodetectors, including the steps of: collecting solar-blind UV radiation using solar-blind UV photodetectors according to a preset sampling time and generating the same into sampled signals; performing noise reduction on the sampled signals to generate filtered signals using a fractional calculus digital filter; calculating estimated curvatures of the filtered signals using a method of circle fitting by discrete points, and numerically optimizing the estimated curvatures using an exponential function to obtain curvature vectors of the filtered signals; and calculating weight coefficients and weighting the filtered signals using a moving average filter function and a binarization method according to the curvature vectors.

A light intensity measuring device for an ultraviolet disinfection chamber and a related method are provided. The light intensity measuring device for the ultraviolet disinfection chamber includes a base, a photocell array rotatably arranged at the base and configured to simultaneously measure the ultraviolet light intensity in the ultraviolet disinfection chamber at multiple points, and a supporting component arranged at the chamber top of the photocell array.