38 results about "Observation level" patented technology

A pressure wavefield and a normal velocity wavefield measured on a smoothly shaped acquisition surface by towed dual-sensor marine seismic streamers are decomposed into up-going and down-going pressure and particle velocity components on an observation level between the acquisition surface and a sea surface of undetermined shape. The up-going and down-going pressure and particle velocity components are extrapolated iteratively in steps from the observation level toward the sea surface. An image point and a reflection coefficient of the sea surface at the image point are determined from the iteratively extrapolated up-going and down-going pressure and particle velocity components.

The invention discloses an atmospheric refraction coefficient inverting method based on a trigonometric leveling network. The method comprises the following steps of acquiring trigonometric leveling network data; calculating the direct observation level difference hli and the reversed observation level difference h2i of each measured side in the network by the trigonometric leveling measuring method; calculating the number n of independent triangles in the network; calculating the sum Cj of the three sides of each triangle; calculating the weight Pj of each triangle in the network; calculating the level difference closure error omega j of each triangle; applying a constraint condition y; according to the relation between the constraint condition y and the atmospheric refraction coefficient k, drawing a curve graph; taking k value by using the curve graph and the constraint condition; and calculating discrepancy value delta i of the direct observation level difference and the reversed observation level difference, and finding out the k value which makes the y value minimum under the premise that the delta i and the omega j are not beyond limit. The method is more dynamic for the selection of the atmospheric refraction coefficient instead of separately using the atmospheric refraction reference coefficient; and the k value of each side is not required to be calculated, but the most appropriate k value applicable to the whole network is calculated according to related conditions, and the value has relatively high actual goodness fit, so that the applicability of the method is improved to certain degree.

The invention discloses a method for controlling a shallow water observation-level mini underwater robot. The method includes control construction and communication frame; by means of the method, a lower computer main control panel controls three underwater propellers to rotate, controls cameras to switch, controls a switch of an underwater light-emitting diode (LED) lamp and brightness of the LED lamp, and achieves various underwater automation functions (such as automatic depth keeping, automatic come-up and submergence and automatic advance); both-way communication between a deck unit and the underwater robot is achieved, so is communication between a main control chip of the underwater robot and a co-processor ATmega 8, a communication protocol relevant to communication between the underwater robot and the deck unit is formulated, the underwater robot can receive control instructions of the deck unit, and the deck unit can receive state information sent by the underwater robot. Besides, according to the method, feasibility of achieving automatic depth keeping on the basis of an incremental PID algorithm is discussed, and accuracy of automatic depth keeping is analyzed and proved through experimental verification machine data.

The invention discloses a method for measuring an opposite-direction observation level of a dual-observation unit composite level gage capable of effectively improving the level measurement accuracy and reliability. According to the method, the dual-observation unit composite level gage comprising a first single level gage and a second electronic level gage is adopted, and four-system opposite-direction observation is realized. The defect that the conventional composite level gage double system is unstable in opposite-direction measurement and poor in reliability is overcome, the influences ofobservation locality and random variation on the overall transverse level measurement are effectively avoided, the smoothness of transverse level measurement is improved, the level measurement reliability is ensured, the level measurement accuracy is greatly improved, and the effect from quantitative change to qualitative change is achieved.

The invention discloses an unmanned combat aircraft group encirclement control method imitating the hunting behavior of wolves, which is characterized in that: the method steps are as follows: step 1: initialize the motion model of the unmanned aerial vehicle; step 2: determine the observation level of wolves hunting roles; Step 3: Calculating the wolf pack leader-following target state observer; Step 4: Designing the encirclement control law of the leader wolf-slave wolf interaction mechanism; Step 5: Conversion of equivalent control instructions; Step 6: Outputting the UAV cluster encirclement control trajectory. The method of the present invention learns from the leader-follower interaction relationship in the opportunistic hunting strategy of wolves, and under the condition of limited detection and communication range, by enhancing the interaction of heterogeneous nodes, it maintains the connectivity and stability of cluster encirclement control under limited perception.

The invention discloses a shallow water observation-level streamline type small-size underwater robot control system. The shallow water observation-level streamline type small-size underwater robot control system comprises a main control panel module used for acquiring data of two rockers and electric quantity of a deck unit and communicating with an underwater robot; a deck unit main control module connected to the main control panel module through a video difference reception module, a video difference sending module, a first 485 communication module and a second 485 communication module to realize communication and used for controlling the deck control system of the underwater robot; the video difference reception module and the video difference sending module both used for partitioning continuous three-frame differential diagram and carrying out mathematical morphological processing for a moving target obtained through the partitioning so as to remove sending and reception of discontinuous and hollowed videos occurred after the image partitioning; the first 485 communication module and the second 485 communication module both used for judging 0 or 1 through high and low electric levels, wherein each protocol only define 01 arrangement mode and significance. In addition, the shallow water observation-level streamline type small-size underwater robot control system has relatively light quantity, is convenient to carry, and is easy as well as simple to handle.

The invention discloses a radiometer ground detection system and method. The system is used for testing an on-satellite receiver unit and an on-satellite digital control unit on the ground. The systemincludes a temperature measurement data input module (5), an analog temperature measurement data output module (6), an output module (7) of each channel voltage of an analog receiver and a data processing module (8). The temperature measurement data input module (5) is used for reading temperature measurement data output by the on-satellite receiver unit; the analog temperature measurement data output module (6) is used for simulating a temperature measurement circuit to output periodic data to the on-satellite digital control unit; and the output module (7) of each channel voltage of the analog receiver is used for simulating functions of the analog receiver to output cold air, over-the-ground and observation level signals of each channel for the on-satellite digital control unit to perform collection and testing. The data processing module (8) is used for receiving a data packet sent by the on-satellite digital control unit, and sending the data packet to an upper computer. The system has the advantages of being small in size, multiple in functions and high in universality.