35results about How to "Good anti-interference characteristics" patented technology

The invention discloses a generating and compression method for multi-frequency-scan radar signals. The generating method for the multi-frequency-scan radar signals is provided based on the idea that power density of signals on a time frequency domain is reduced as mush as possible. A single frequency scan signal circumferential displacement and stacking method is utilized to generate time frequency simultaneous multiplex frequency scan signals, the multi-frequency-scan signals are generated, and frequency-scan signals are multiplexed simultaneously in time and frequency in one single pulse time period. The multi-frequency-scan signals of frequency multiplexing are utilized to conduct matched filtering, subsection accumulation is then conducted to obtain distance resolution in negative proportion with bandwidth and signal to noise ratio of a single compressed frequency-scan signal under same energy condition, and secondary compression of the multi-frequency-scan signals is achieved. The signals generated by the methods have high spectrum efficiency and low intercepted probability, and distance resolution and detection distance of the radar are guaranteed.

The invention relates to the research field of the road traffic safety, which discloses an integrative monitoring system of the automobilism action of a driver. The integrative monitoring system comprises a CAN bus, a server, a microwave radar distance measurement module, an infrared laser scanning module, a braking pedal stroke measurement module, a steering wheel turn angle test module, a vehicle motion state measurement module, a driveway identification module, a driver eye motion measurement module and an environmental monitoring module, wherein the server is hung and connected on the CANbus, and the driver eye motion measurement module and the environmental monitoring module are respectively accessed into the server by network lines.

A beacon layout and image processing method based on UAV pose calculation. Firstly, the machine vision-guided landing of UAV is designed. According to the built visual imaging system, the image sensitivity is ensured and the field of view distortion is analyzed. Under certain conditions, combined with the possible poses during the landing process, design the beacon structure and layout method required for the vision-guided landing. Then, according to the designed vision-guided system, for different cooperative beacon configurations, three measures are proposed. The index of algorithm applicability is used to evaluate and screen the pose calculation algorithm. Finally, the ground cooperation beacon used is infrared LED. The imaging effect of infrared LED is more stable, the imaging distance is longer, and the imaging accuracy is higher. This method is simple and easy to implement, has low requirements on the configuration of the landing site, is more convenient and faster to extract features from near-infrared images, expands the scope of application of the vision system, and can detect and identify all-weather and all-weather; Machine attitude information.

The invention proposes an intensity grading system and method based on partial discharge of electrical equipment. The system of the invention includes multiple optical signal transmission units, multiple signal conditioning units, multiple data acquisition cards and data terminals. The method of the present invention utilizes the switchgear to establish a three-dimensional coordinate system, and the length, width and height of the switchgear coincide with the axes of the three-dimensional coordinate system respectively; the collimating mirror probes in a plurality of optical signal transmission units are divided into multiple groups, and placed symmetrically ; through the corresponding optical signal transmission unit, signal conditioning unit and data acquisition card to collect the real-time voltage digital signal converted from partial discharge radiation ultraviolet light and transmit it to the data terminal; the data terminal counts the number of pulses of the real-time voltage digital signal and performs weighting For calculation, the high-voltage partial discharge source is placed inside the switch cabinet and multiple levels of discharge power are set to construct a pulse array matrix, and the intensity classification of partial discharge is established through the pulse array matrix and multiple levels of discharge power.

The invention discloses a DLP signal receiving system suitable for laser radar and an adaptive adjustment method thereof. A laser transmitter emits a laser signal through a laser scanning mirror to form a laser scanning area, and a DLP signal receiver controls the laser scanning area. Scanning points for signal acquisition, the DLP signal receiver includes a plurality of DLP micromirrors arranged in an array, and the laser reflection signal of each scanning point is tracked by more than one corresponding DLP micromirror in the array of DLP micromirrors and receiving; the laser transmitter is integrated with the DLP signal receiver, or the laser transmitter is adjacent to the DLP signal receiver; the DLP micromirrors arranged in an array are used to track and receive the laser radar synchronously The laser reflection signal in the scanning area controls the deflection of the DLP micromirror array to synchronize with the lidar scanning, and selectively projects the area imaged by the scanning target reflection signal to the photoelectric sensor, thereby improving the signal of receiving the laser reflection signal in the scanning area of ​​the lidar Noise ratio, while achieving better anti-interference characteristics.

The invention provides a method for detecting underwater weak and small targets, which relates to the field of signal processing, uses the feature layer information fusion method to map the feature quantity into the same high-dimensional space, realizes classification, and detects through the classification results. The invention uses chaos theory Accurately describe and realize the feature extraction of the target signal and nonlinear components in the environmental noise, effectively avoid the interference of random components in the environmental noise, use the chaotic features in the signal for signal detection, which can significantly reduce the minimum detection signal-to-noise ratio and improve the detection probability. The random resonance method converts random noise energy into signal energy, improves the detection ability of weak targets, and can also highlight the nonlinear components contained in the signal. The classification method of the fusion center can eliminate false alarms and missed detections in a single node. etc. are separated from the correct detection results to further increase the detection probability and improve the effectiveness and reliability of weak and small target detection at sea.

The present invention relates to a tag antenna that solves the problem of densely placed interference, which includes: the antenna body is in a rectangular shape, and the first hollow part includes: a first sub-hollowout part, a second sub-hollowout part and a third sub-hollowout part, the first sub-hollowout part Both the first sub-hollowout and the third sub-hollowout are parallel to the wide side of the antenna body, the second sub-hollowout is parallel to the long side of the antenna body, and the tail end of the first sub-hollowout is connected to a tail end of the second sub-hollowout. connection, the tail end of the third sub-hollow part is connected to the other end of the second sub-hollow part; Both the hollowed-out part and the sixth sub-hollowed-out part are parallel to the wide side of the antenna body, the fifth sub-hollowed-out part is parallel to the long side of the antenna body, and the tail end of the fourth sub-hollowed-out part is connected to a tail end of the fifth sub-hollowed-out part, The tail end of the sixth sub-hollow part is connected with the other tail end of the fifth sub-hollow part.