3results about How to "High detection" patented technology

The application belongs to the technical field of radar signal processing and imaging, and provides a differential coupling single-frequency time-varying low-quantization imaging method, which comprises receiving a SAR echo signal, constructing a single-frequency time-varying threshold signal, single-bit quantization processing of a reference channel, single-bit quantization processing of a phase shift channel, double-channel data fusion and harmonic cancellation, and imaging processing based on a synthesized signal. The application effectively reduces the quantization noise base and improves the detection capability of a SAR system on weak targets under the premise of not significantly increasing the hardware cost.

The invention relates to the technical field of deep sea resource development, in particular to a magnetic type deep sea ore collecting device which comprises a rigid pressure-resistant main frame, mechanical legs, mechanical arms, an ore processing module, a communication module, a pushing module and a positioning module. A sealed pressure-resistant cabin is arranged in the rigid pressure-resistant main frame; the mechanical legs are symmetrically installed on the two sides of the rigid pressure-resistant main frame. The mechanical arm is installed on the front end face of the rigid pressure-resistant main frame. The ore processing module is arranged along the center line of the rigid pressure-resistant main frame; the communication module is connected with the water surface support mother ship through an armored cable; the pushing module comprises a plurality of horizontal propellers and a plurality of vertical propellers; the positioning module is installed on the upper side face of the rigid pressure-resistant main frame. The device provided by the invention has the advantages of good terrain adaptability, high collection integrity, small disturbance and reliable operation, and is suitable for selective collection operation of resources in a deep sea complex environment.

The application discloses a cut-off filter based on a microstructure array, which comprises a substrate, a dielectric film and a two-dimensional grating array structure arranged on the substrate in sequence; the substrate material is a high-refractive-index material; the dielectric film material is a low-refractive-index material; and the two-dimensional grating material is a high-refractive-index material. The application further provides a preparation method of the cut-off filter based on the microstructure array. The preparation method of the cut-off filter based on the microstructure array is simple in preparation, low in cost and convenient for large-scale and batch production. Therefore, the application can be widely applied in the fields of surveying and mapping remote sensing, environmental monitoring, sensing detection and clinical image analysis.