48 results about "Shortwave infrared" patented technology

A system for detecting ice or supercooled large droplets within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range of about 2.05 μm to about 2.30 μm. The detection system measures the radiance or reflectance in a first band having a wavelength in the range of about 2.05 μm to about 2.15 μm and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in the range of about 2.15 μm to about 2.30 μm and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or supercooled water droplets.

The invention discloses a shortwave infrared day and night remote multispectral imager and an imaging method. A light filter wheel splits light after optical signals pass through a shortwave infrared lens, and a detector component and an electronic portion complete photovoltaic conversion and image data acquisition and output images. A laser device outputs lasers of corresponding wavelengths for lightening according to current imaging wave bands and completes multispectral imaging matching with the light filter wheel. According to the shortwave infrared day and night remote multispectral imager and the imaging method, good atmosphere transmission characteristics of shortwave infrareds are used to perform remote multispectral observation; and shortwave infrared large-power tunable lasers which are invisible by human eyes are assisted to lighten corresponding bands, and night imaging is achieved.

A system for detecting ice or water within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range containing a crossover point between the curves representing the absorption of electromagnetic radiation by ice and water. The detection system measures the radiance or reflectance in a first band having a wavelength in a spectral band on a first side of the crossover point and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in a spectral band on a second opposing side of the same crossover point and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or water.

Methods, a computer-readable medium, and a system are provided for determining whether a data point indicates a presence of a cloud using visible near-infrared data and short wavelength infrared data. A first comparison of a cirrus-band reflectance of the data point with a threshold cirrus-band reflectance value is made, classifying the data point as a cloud point if the cirrus-band reflectance of the data point exceeds the threshold cirrus-band reflectance value. When the comparing of the cirrus-band reflectance of the data point with the threshold cirrus-band reflectance value does not classify the data point as a cloud point, a further analysis is performed, including performing a second or more comparisons of additional cloud indicators derived from at least one of the visible, near-infrared, and short wavelength infrared data with related empirically-derived, landcover-dependent thresholds for classifying the data point as a cloud point or a non-cloud point.

A system for detecting ice or supercooled large droplets within an area of interest having a detection system measuring radiance or reflectance of the area of interest when exposed to shortwave infrared radiation having a wavelength in the range of about 2.05 μm to about 2.30 μm. The detection system measures the radiance or reflectance in a first band having a wavelength in the range of about 2.05 μm to about 2.15 μm and outputting a first band signal, and further measures the radiance or reflectance in a second band having a wavelength in the range of about 2.15 μm to about 2.30 μm and outputting a second band signal. A processing unit determines a ratio of the first band signal and the second band signal and compares the ratio to a predetermined critical ratio and outputs a determination signal indicating presence of ice or supercooled water droplets.

The invention discloses a ginger rapid drying device, which comprises a machine body, a fluidized bed and a ginger conveying wire belt penetrating the machine body, wherein the machine body is sequentially divided into a shortwave infrared heating area, a medium-wave infrared heating area and a far-infrared heating area, a shortwave infrared heating pipe nest is arranged on the inner upper part of the shortwave infrared heating area, a medium-wave infrared heating pipe nest is arranged on the inner upper part of the medium-wave infrared heating area, a far-infrared heating pipe nest is arranged on the inner upper part of the far-infrared heating area, the top of the far-infrared heating area is provided with an air inlet, and the top of the shortwave infrared heating area and the top of the medium-wave infrared heating area are respectively provided with an air outlet; and the fluidized bed comprises a bed body and a blower, wherein the blower is communicated with the bed body, the bed body is provided with an air blowing hole, and the bed body of the fluidized bed is arranged inside the shortwave infrared heating area and the medium-wave infrared heating area and is closely abutted against the lower side of the ginger conveying wire belt. By adopting a way combining the infrared heating and the fluidized bed as well as the hot air circulation, a purpose for rapidly drying ginger is realized, and simultaneously the ginger can be prevented from being discolored.

The invention provides a crop biomass remote sensing estimation method considering water stress. The method comprises the steps of S1: obtaining optical remote sensing data with a near-infrared waveband and a shortwave infrared waveband in a target region; S2: performing atmospheric correction processing on the obtained optical remote sensing data to obtain real surface reflectivity data of the target region; S3: extracting a planting space distribution region of crop; S4: determining a normalized vegetation index and a time integral value of the crop; S5: obtaining a water stress coefficient of the crop; S6: obtaining a biomass conversion coefficient of the crop; and S7: building a biomass estimation model of the crop. The method is in favor of estimating the biomasses of the crop in different growth periods more accurately in regional scale, and has important application values in the aspects of further realizing crop growth trend monitoring, yield estimation, drought monitoring, drought loss assessment and the like.

A system for detection and identification of objects and obstacles near, between or on railway comprise several forward-looking imagers adapted to cover each different range forward and preferably to be sensitive each to different wavelength of radiation, including visible light, LWIR, and SWIR. The substantially homogeneous temperature along the rail the image of which is included in an imager frame assists in identifying and distinguishing the rail from the background. Image processing is applied to define living creature in the image frame and to distinguish from a man-made object based on temperature of the body. Electro optic sensors (e.g. thermal infrared imaging sensor and visible band imaging sensor) are used to survey and monitor railway scenes in real time.

The invention discloses an InGaAs short-wave infrared detector signal processing system, which comprises an InGaAs short-wave infrared detector, a signal input terminal, a differential single-end conversion circuit, a signal conditioning filter circuit, an analog-to-digital conversion circuit, and a data processing circuit. The system realizes signal impedance matching, amplification, and main-backup interface support through a differential single-ended conversion circuit. The signal is processed by a signal conditioning filter circuit, and then enters an analog-to-digital conversion circuit to output digital data, and finally transmits the data to a data processing circuit. middle. Compared with the traditional InGaAs short-wave infrared detector signal processing system, it has the characteristics of low noise introduced by the circuit, the input terminal supports system main backup, and strong anti-interference ability.

The invention provides a short-wave infrared driver's vision enhancement system, which includes a short-wave infrared transmission lens, a short-wave infrared imaging device, a comprehensive data processing device, a control module, a power supply module, a display device, and a short-wave infrared transmission lens connected to the short-wave infrared imaging device. , the integrated data processing device is connected to the short-wave infrared imaging device through a data transmission line, connected to the display device through a video signal line, the control module is connected to the short-wave infrared imaging device and the comprehensive data processing device through a control line, and the power module provides the power required by the system. All the above devices are installed in the cab. The present invention has the advantages of: utilizing the characteristics of short-wave infrared penetrating glass, the short-wave infrared driver's vision enhancement system is installed in the driver's cab, which makes up for the deficiency that the long-wave infrared vision enhancement system cannot penetrate the glass and needs to be installed outside the vehicle, and at the same time reduces the structural Windproof, rainproof, anti-theft and other requirements.

An artificial intelligence-based infrared thermal imaging body temperature detection method, apparatus, and terminal device, for improving the accuracy and efficiency of body temperature detection. The detection method comprises: by means of a camera arranged on a tripod head collecting images, identifying a detection target and the exposed body parts of the detection target (S101); in response to shortwave infrared rays of the exposed body parts and shortwave infrared rays in the environment in which the detection target is located, detecting the body surface temperature of the detection target and the ambient temperature of the environment in which the detection target is located (S102); substituting the body surface temperature of the detection target and the ambient temperature of the environment in which the detection target is located into an algorithmic formula, and acquiring the core body temperature of the detection target (S103); and sending the core body temperature of the detection target to a medical care server (S104). The present method can simultaneously detect the body temperature of multiple detection targets, greatly improving the efficiency of temperature detection, and also improves the accuracy of body temperature detection.

A multiband IR adjunct (MIRA) sensor to spectroscopically determine the content and the concentration of chemical composition of a targeted object, includes a sensor housing, a first front optics in a first optical channel, a second front optics in the first optical channel, an acousto-optic tunable filter (AOTF), a photo detector (PD), a set of back optics in the first optical channel that focuses polarized narrow-band light beams received from the AOTF device onto the PD, the PD converting the polarized narrow-band light beams into an electrical signal, and a data acquisition unit signal-connected to the PD, the data acquisition unit collecting the electrical signals. Multiple optical channels can be provided within the housing to analyze UV / VIS / near infrared (NIR), short-wavelength infrared (SWIR), mid-wavelength infrared (MWIR), and LWIR wavelength ranges respectively.

The invention discloses a ginger rapid drying device, which comprises a machine body, a fluidized bed and a ginger conveying wire belt penetrating the machine body, wherein the machine body is sequentially divided into a shortwave infrared heating area, a medium-wave infrared heating area and a far-infrared heating area, a shortwave infrared heating pipe nest is arranged on the inner upper part of the shortwave infrared heating area, a medium-wave infrared heating pipe nest is arranged on the inner upper part of the medium-wave infrared heating area, a far-infrared heating pipe nest is arranged on the inner upper part of the far-infrared heating area, the top of the far-infrared heating area is provided with an air inlet, and the top of the shortwave infrared heating area and the top of the medium-wave infrared heating area are respectively provided with an air outlet; and the fluidized bed comprises a bed body and a blower, wherein the blower is communicated with the bed body, the bed body is provided with an air blowing hole, and the bed body of the fluidized bed is arranged inside the shortwave infrared heating area and the medium-wave infrared heating area and is closely abutted against the lower side of the ginger conveying wire belt. By adopting a way combining the infrared heating and the fluidized bed as well as the hot air circulation, a purpose for rapidly drying ginger is realized, and simultaneously the ginger can be prevented from being discolored.

The invention relates to a fire detection method based on multi-temporal Landsat-8 OLI image short-wave infrared, comprising the following steps: 1) acquiring satellite fire area image data, and preprocessing the temporal images before and after the fire; 2) after preprocessing Calculate the NBRSWIR index map from the image; 3) Perform a difference operation on the index maps of the front and back phases to obtain the NBRSWIR difference map, and judge the fire area based on the NBRSWIR difference map. Compared with the prior art, the present invention has the advantages of being accurate, fast, effective and practical.