35 results about "Step tracking" patented technology

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 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.