35 results about "Step tracking" patented technology

Disclosed are a rotation missing plot tracking system and method for a double-reflection-surface satellite antenna, which are used for solving the deficiency of an existing satellite antenna automatic tracking system, characterized by comprising a main reflection surface, a secondary reflection surface and a feed source, wherein the main reflection surface is provided with a servo tracking unit and a main control unit; the main reflection surface, the secondary reflection surface and the feed source are coaxially arranged; one of the main reflection surface and the secondary reflection surface can rotate around an axial centre and is provided with a rotation mechanism; and the rotating main reflection surface or secondary reflection surface is eccentrically provided with a signal local-failure zone. Compared with stepped tracking, the present invention has a high precision and is quick in response; compared with conical scanning tracking, a main reflection surface and a secondary reflection surface are coaxially arranged, thereby decreasing a side lobe, reducing the interference of an adjacent satellite and improving the applicability; and compared with single-pulse tracking, by using a rotating and eccentrical signal local-failure zone, a quasi-sinusoidal signal of a model intensity period change can be acquired, which has a simple device and a low cost.

The tackifying agent of the present invention contains an acrylic base polymer and a hydrolyzable terpene phenol resin with a softening point of 70°C to 150°C. The hydrolyzable terpene phenol resin preferably has a terpene molar ratio of 0.1 to 0.7. The amount of acrylic base polymer is preferably 45 to 95 weight parts in 100 weight parts of the total amount of the tackifying agent composition. Furthermore, the total amount of the acrylic base polymer and the hydrolyzable terpene phenol resin is preferably 14 weight parts or more. The tackifying agent of the present invention does not easily become cloudy even under high temperature high humidity conditions, and has step tracking properties, and therefore can be used by placing between a front surface transparent plate and a touch panel, between a front surface transparent plate and an image display panel, or between a touch panel and an image display panel.

Disclosed are an apparatus for measuring distance using two-step tracking and a method thereof. More particularly, the apparatus includes a bit generator configured to generate coarse bits for first tracking from sensing data to measure distance to a target and fine bits for second tracking, corresponding to the coarse bits, to measure precise distance to the target; a coarse bit processor configured to receive the coarse bits, address the received coarse bits in any one histogram bin, which corresponds to the received coarse bits, among a plurality of histogram bins, and output coarse bits, which correspond to any one histogram bin exceeding a preset threshold among the histogram bins, as reference coarse bits; and a fine bit processor configured to output fine bits corresponding to the reference coarse bits.

The invention relates to an indoor trajectory tracking method with self-adaptive step length. The indoor trajectory tracking method comprises the following steps: setting the initial speed and the final speed of every step of walking are zero, judging whether to be in a walking state, if so, collecting the number of accelerations in every step, and calculating to obtain the step length of the first step according to the accelerations and the sampling time of the accelerations; by combining with the direction of every step, carrying out vector superposition on every step, and thus obtaining the motion trajectory. The indoor trajectory tracking method has the advantages that by adoption of indoor-pedestrian trajectory tracking based on an MEMS inertial sensor, the accuracy of gesture detection of an inertial navigation positioning system is improved and the errors of the step-length calculation are reduced, so that the accuracy of navigation positioning is improved; and by adoption of the self-adaptive mechanism, the step length of every step can be accurately calculated, the accuracy of navigation positioning can be improved and the promotion of inertial navigation positioning application can be enhanced.

The invention discloses a method and a device for seeking stars by using a satellite antenna. The method comprises the steps of: S1, judging that the antenna is in an unfolded state or a folded state; S2, if the antenna is in the folded state, controlling a main reflecting surface of a pitching motor driving antenna and a feed source supporting rod to be lifted to the preset positions by using a control system, installing side lobes and carrying out the step S3; if the antenna is in the unfolded state, directly carrying out the step S3; S3, reading the data of an inclinometer and calculating the pitching state of the antenna according to the data by using the control system; S4, initializing the direction state of the antenna by using the control system; S5, rotating the main reflecting surface of the antenna to the working position by using the control system; and S6, carrying out satellite search and step tracking by using the control system. The invention achieves the purpose of accurate star seeking by adopting the control system for control the polarization, the direction and the pitching of the satellite antenna and solves the problems of complicated operation, instable performance and low star-matching speed of the satellite antenna in the prior art.

The invention provides a microwave-based intelligent traffic behavior perception method and system. The intelligent traffic behavior perception method includes: a traffic parameter setting step, a road traffic background learning step, a road background noise suppression step, a calculation step, a coordinate system establishment step, The vehicle type classification step, the tracking processing step, and the triggering alarm step. The beneficial effects of the present invention are: the present invention proposes a microwave (millimeter wave)-based system that can operate around the clock, has high precision, high reliability, large-area detection, high economic benefit and cost ratio, easy installation, and multi-dimensional A method and system for comprehensive traffic behavior analysis of various vehicles in the detection area. At the same time, background noise suppression is performed through a two-dimensional radar image method for some road barriers such as isolation belts or metal railings that will affect radar performance.

The invention discloses a satellite antenna polarized closed loop tracking method and a device. The satellite antenna polarized closed loop tracking method comprises steps performing angle loop closing on a pitch angle, an azimuth and a polarized angle of the satellite antenna, regulating the pitch angle, the azimuth and the polarized angle to a first preset angle, a second preset angle and a third preset angle, performing polarized stepping tracking on a beacon signal of a satellite according to a beacon signal frequency, converting the beacon signal to a DC level signal according to the regulated pitch angle, the azimuth and the polarized angle, and regulating the rotation direction and the rotation angle of the satellite antenna according to the change of the DC level signal. The invention adopts the polarized tracking principle identical to the pitching tracking mode to realize the tracking of the angle closed loop and then the tracking of the signal closed loop, reduces the double-direction interference problem of the reversed polarized signal and improves the communication quality.

The peak tracking method of the height signal of the drone belongs to the field of radar, and solves the problem of the stability of the calculation of the radar height of the plant protection rotor drone. The technical points are: including the step of tracking the threshold peak point; and the step of distance tracking. The effect is: improved stability and real-time performance.

The present invention relates to a satellite tracking antenna system and a satellite tracking method. Step tracking in which the size of a satellite signal sampled in at least one position in which a reflector of the satellite tracking antenna system is tilted is compared to track a satellite is performed, and a measured value of the satellite signal sampled in a specific position in which the reflector is tilted in N-lth tracking and a measured value of the satellite signal sampled in the specific position in which the reflector is tilted in Nth tracking are averaged to compute a value. The reflector is driven according to the value to track the satellite, thereby minimizing a satellite tracking error caused by a sudden movement of a mobile body equipped with the satellite tracking antenna system.

The invention provides a multifunctional machine for glass cutting, code-spurting, carving and thickness measurement and relates to the field of glass machinery. The multifunctional machine comprises a worktable top of the machine; the multifunctional machine is characterized in that longitudinal traveling mechanisms are arranged on the two sides of the worktable top, a cross beam is erected between the longitudinal traveling mechanisms on the two sides, a transverse traveling drive mechanism is arranged on the transverse beam, and a multifunctional handpiece is arranged on the transverse traveling drive mechanism and comprises a code-spurting mechanism, a precision cutter box, a thickness measurement mechanism and a traveling power transmission mechanism. The multifunctional machine for glass cutting, code-spurting, carving and thickness measurement is a multifunctional glass machining machine and has the functions of cutting, code-spurting, carving and thickness measurement simultaneously; a glass cutter or a carving cutter can be mounted in the precision cutter box and can be used for cutting and carving glass; the code-spurting mechanism is capable of realizing spray printing of the content needed by a customer on plate glass and used for step tracking and workpiece identification.

The invention discloses a scale adaptive target tracking method based on a fast compression tracking algorithm. Firstly, the present invention adopts the context model to weight the Haar-like features, which enhances the robustness of the Haar-like features to illumination changes. Secondly, the step-by-step tracking is adopted, which not only enhances the anti-occlusion ability of the algorithm and the ability to deal with the change of target scale, but also maintains the real-time performance of the algorithm. Finally, a scale-adaptive method is proposed to achieve stable tracking of scale-varying targets. The present invention has good robustness to the change of the target scale, the change of the target appearance and the situation that the target is blocked, and can guarantee the frame rate at about 39 frames per second, which meets the requirement of real-time performance.