A tomography duct for wind tunnels includes a plurality of light sources and sensors displaced around a support structure. The light sources are cycled and sensor measurements are made from sensors opposite the light sources. Tomographic algorithms are used to determine an extinction map from the sensor measurements. The extinction map provides details about particles in a cross-section of the air flow through the tomography duct.

A device (12) for measuring the water content of the ground, vegetation and snow, comprises: at least one first module (20) adapted to measure a flow of cosmic rays incident to the ground; at least one second module (40) adapted to measure an ambient neutron flow; and a control unit (60) connected to said at least one first module (20) and said at least one second module (40). The control unit (60) is adapted to process the measurements of said at least one first module (20) and said at least one second module (40) to determine the measurement of the water content.

The invention relates to the technical field of test equipment, in particular to a test device for simulating pollutant migration and transformation in icing and melting processes of a water body. The device comprises: a transparent cylinder body with the top open and the bottom closed, used for holding a test water body; a transparent box body, wherein the top of the box body is provided with a through hole through which the cylinder body is provided in the box body; a first refrigerating system including a first evaporator provided in the cylinder body close to an opening of the cylinder body, wherein the first refrigerating system is used for controlling the temperature of a first space from a surface of a test water body in the cylinder body to the opening of the cylinder body through the first evaporator; and a second refrigerating system used for controlling the temperature in the box body. According to the test device provided by the embodiment of the invention, the icing and melting processes of a test water body can be simulated, so that researchers do not need to extract a water sample on site, but can easily know the influence of the icing and melting processes on the migration and transformation of pollutants.

A compact, handheld, battery-powered radar transceiver used to analyze the stability of the snowpack to avoid avalanche danger. The device scans the snowpack and presents a depth vs. density profile chart and highlights layers of concern (strong over weak layers) and other relevant information on an integrated backlit touchscreen LCD.

A tomography duct for wind tunnels includes a plurality of light sources and sensors displaced around a support structure. The light sources are cycled and sensor measurements are made from sensors opposite the light sources. Tomographic algorithms are used to determine an extinction map from the sensor measurements. The extinction map provides details about particles in a cross-section of the air flow through the tomography duct.

Multiple spatially diverse and compact weight sensors are statistically combined to reduce or eliminate errors caused by snow bridging. Data transmission using satellite communication minimizes the power consumption of the sensor station further allowing the entire system to be relatively compact and easily transported. The weight sensors may be combined with other standard sensors for measurement of air temperature and snow height, the latter measurement, for example, using ultrasound ranging or the like.

The present disclosure provides a filtration system for collecting Black Carbon (BC) samples present in snow samples and similar matrices which comprises the collection of BC in polycarbonate filters. It also discloses a method of determination of (BC) in snow samples and similar matrices using real soot from the gases of a diesel vehicle as calibration standards.

The invention relates to a device and method for laboratory ice jam and ice dam radar measurement tests, the device includes a non-metal water tank, a truss spans the top of the non-metal water tank, the truss is connected with a radar plate parallel to a surface of water through a lifting mechanism, a measuring radar is provided on the radar plate, a permeable measuring barrel soaked in the water is provided below the radar plate, a barrel bottom of the permeable measuring barrel is a permeable plate capable of rising and falling, model ice blocks are provided in the permeable measuring barrel, and a handle capable of shaking the truss upwards, downwards, leftwards and rightwards is provided on the truss. According to the invention, through establishing simulated ice jam and ice dam in the permeable measuring barrel, the formation and characteristics of the ice jam and the ice dam are tested, and systematic research can be carried out to address the difficulties, such as radar echo images and the dielectric constant, in the radar measurement of the ice jam and the ice dam and a water depth underneath the ice, so that the measurement accuracy of corresponding equipment is improved, and further development of related disciplines is promoted. A whole set of the device is simple in structure, low in cost, and facilitated and effective in the implementation of tests.

A tomography duct for wind tunnels includes a plurality of light sources and sensors displaced around a support structure. The light sources are cycled and sensor measurements are made from sensors opposite the light sources. Tomographic algorithms are used to determine an extinction map from the sensor measurements. The extinction map provides details about particles in a cross-section of the air flow through the tomography duct.

The invention relates to a device and method for laboratory ice jam and ice dam radar measurement tests, the device includes a non-metal water tank, a truss spans the top of the non-metal water tank, the truss is connected with a radar plate parallel to a surface of water through a lifting mechanism, a measuring radar is provided on the radar plate, a permeable measuring barrel soaked in the water is provided below the radar plate, a barrel bottom of the permeable measuring barrel is a permeable plate capable of rising and falling, model ice blocks are provided in the permeable measuring barrel, and a handle capable of shaking the truss upwards, downwards, leftwards and rightwards is provided on the truss. According to the invention, through establishing simulated ice jam and ice dam in the permeable measuring barrel, the formation and characteristics of the ice jam and the ice dam are tested, and systematic research can be carried out to address the difficulties, such as radar echo images and the dielectric constant, in the radar measurement of the ice jam and the ice dam and a water depth underneath the ice, so that the measurement accuracy of corresponding equipment is improved, and further development of related disciplines is promoted. A whole set of the device is simple in structure, low in cost, and facilitated and effective in the implementation of tests.