64results about How to "Moderate accuracy" patented technology

The invention discloses a man-machine interactive manipulator control system and method based on binocular vision. The man-machine interactive manipulator control system is composed of a real-time image collecting device, a laser guiding device, a programmable controller and a driving device. The programmable controller is composed of a binocular three-dimensional vision module, a three-dimensional coordinate system transformation module, an inverse manipulator joint angle module and a control module. Color characteristics in a binocular image are extracted through the real-time image collecting device to be used as a signal source for controlling a manipulator, and three-dimensional information of red characteristic laser points in a view real-time image is obtained through transformation and calculation of the binocular three-dimensional vision system and a three-dimensional coordinate system and used for controlling the manipulator to conduct man-machine interactive object tracking operation. The control system and method can effectively conduct real-time tracking and extracting of a moving target object and is wide in application fields such as intelligent artificial limb installing, explosive-handling robots, manipulators helping the old and the disabled and the like.

An aircraft capable of thrust-borne flight can be automatically retrieved, serviced, and launched using equipment suitable for a small vessel. For retrieval, the aircraft hovers over a base apparatus having one or more rails which bound a space into which the aircraft can safely descend. When the aircraft's measured position and velocity are appropriate, the aircraft descends promptly such that a spanwise component on the aircraft engages the rails. The teeth restrain the aircraft in position and orientation, while the rails bring the aircraft to rest. Articulation of the rails is used to park the aircraft in a servicing station. Connections for refueling, recharging, and/or functional checks are made in preparation for launch. Launch is effected by removing connections and restraints and articulating the rails to put the aircraft in an appropriate position and orientation. The aircraft uses its own thrust to climb out of the apparatus into free flight.

The invention discloses a crane barrier monitoring and prewarning method and system based on binocular vision. The method includes the steps that a binocular vision model is established, and relevant parameters are initialized; images are acquired in real time and preprocessed; target edges are detected, and the characteristics of the images are extracted; the left images and the right images are registered, and a common area is segmented; iteration is repeatedly conducted, and foregrounds and backgrounds are distinguished; three-dimensional information is rebuilt, and the foregrounds and barriers are recognized; motion parameters are resolved, and prewarning information is analyzed and output. According to the crane barrier monitoring and prewarning method and system, a binocular vision system is adopted, the working environment of a crane is monitored in real time, the problem of preventing collision of the crane is effectively solved, and the system has the advantages of being high in efficiency, moderate in accuracy, simple in structure, low in cost, and very suitable for online, non-contact product detection and quality control on a manufacturing site.

Included are a first DAC taking in and retaining sample data of a first analog signal and generating a comparison signal serving as an object of comparison with the first analog signal, a second DAC taking in and retaining sample data of a second analog signal and generating a comparison signal as an object of comparison with the second analog signal, a first switch connecting the first digital-to-analog converter to an output side of a second digital converter in a openable/closable manner, a comparator comparing, when the first switch is opened, a differential value between the first analog signal and the second analog signal with a differential value between an output signal of the first DAC and an output signal of the second DAC, and an electric potential control circuit controlling fluctuations in electric potentials of a first analog terminal and a second analog terminal.

The invention provides a human-simulated mechanical arm. The human-simulated mechanical arm comprises six arm freedom degrees and one paw opening and closing freedom degree. The six arm freedom degrees include the three front end arm freedom degrees and the three tail end wrist freedom degrees, and each freedom degree is controlled through one motor. The three front end arm freedom degrees include a waist rotation motion, large arm swinging and small arm swinging. The three tail end wrist freedom degrees include the two wrist rotation motions and one wrist pitching motion. The three front end arm freedom degrees are driven by brushless direct current motors, the brushless direct current motors perform output to harmonic speed reducers, the motions are output through flanges of the harmonic speed reducers, and a closed loop system is formed by feeding back signals through encoders. The motions of the three tail end wrist freedom degrees are output through steering discs via steering engines. Under the situation that the grabbing function of the human-simulated mechanical arm is met, the few freedom degrees are adopted, and cost is reduced; a joint transmission mechanism is simple and reliable; the light-weight design is adopted, and power consumption is low; the flexibility of the mechanical arm is improved through a self-adaptation paw.

A solid-state imaging device includes: a plurality of pixels which are arranged in a matrix; a sequential scanning device that selects each row of pixels; and an analog-to-digital conversion unit having a first analog-to-digital converter that is connected to a vertical signal line to which a pixel signal is supplied from the pixel and performs a first bit-length analog-to-digital conversion on an output signal from the vertical signal line or a pixel output signal obtained by sampling the output signal, and a second analog-to-digital converter that, when the first analog-to-digital converter completes the conversion operation, subtracts an analog signal corresponding to the first bit-length from the pixel output signal and then performs a second bit-length analog-to-digital conversion.

The invention discloses a vehicle-carried close-range target three-dimensional system and a method for making the same. The inventive system comprises a moving measurement vehicle which is characterized in that there is a measurement platform on the top of the moving vehicle, a data collection sensor on the platform which includes a CCD digital camera, a laser scanner and three GPS receiving antennas. Wherein the signal cables of sensor are connected with a collection control system; the three GPS receiving antennas are connected with a GPS receiving board; the signal output cables of the laser scanner are connected to an industrial controller via parallel or serial interface; the signal output cables of the CCD digital camera are connected with the industrial controller via the extended parallel interface; and the control cables of the digital camera are connected with a single chip computer. The inventive method comprises steps of performing outside collection of three-dimensional data of the city close-range object, then reading the collected data from the industrial controller into indoor computer to perform inside process.

The invention relates to the technical field of remote monitoring of soil moisture status, in particular to a method for monitoring soil moisture status in whole growth period of large-area crops on the basis of the modified NDVI (normalized difference vegetation index) time sequence. Firstly, region division of farmland, division of the crop growth period and source data acquisition and processing are performed; with the NDVI as a basic soil moisture status index, corresponding factors are introduced for different regions and at different growth periods, and self-adaptive modification is performed on the NDVI; a modified NDVI time sequence growth curve of the crops in the whole growth period is established on the basis of correlation verification of the modified NDVI and actually measured soil moisture status; anomaly analysis is performed on the modified NDVI curve of a monitored year and the average value curve of ordinary years, space-time distribution conditions of the relative soil moisture status, compared with the ordinary years, of the farmland in the monitored year are obtained, the soil moisture status of the farmland and the space-time distribution of the soil moisture status are effectively monitored, and the technical problem of failure in monitoring and back analysis of soil moisture status in whole growth period of large-area crops due to the fact that single NDVI cannot accurately reflect the growth states and the root soil moisture status of the crops in the whole growth period is solved.

An optical communication module, such as an optical transmitter used for optical communication incorporating a semiconductor laser (LD) and a monitoring photodiode (MPD), and an optical transceiver including a photodiode (PD), is efficiently and inexpensively provided. As means therefor, two substrates are used, that is, an expensive and high-accuracy first substrate is accommodated in an recess provided in a second substrate that is inexpensive and that needs less accuracy. An optical transmission system is mounted on the first substrate, and the MPD is mounted on the second substrate having an inclined surface provided on an opposite side of the recess in terms of the optical transmission direction. This eases production work and simultaneously allows the decreaseed use of expensive substrates.

A bandgap reference circuit and method of using the same are provided. The bandgap reference circuit may provide start-up requirements at substantially any voltage and at substantially any temperature. The circuit comprises an op amp (two stages of transistors) and a network of resistors and bipolar diodes. When an artificial offset of about −5 mV is introduced to the op amp, the op amp output will be high as soon as the power supply exceeds the transistors' threshold voltages. The op amp output supplies the resistor and diode network and brings the op amp inputs within desired regulation voltages.

The invention discloses a laser scanning multidimensional near-distance remote sensing system and method for synchronously acquiring ground object information and a synchronous acquiring method. The system comprises a two-dimensional laser radar, a rotating polarizer, a high-precision pulse rotating table and an image data acquiring unit and is used for simultaneously acquiring and scanning polarization information, reflection intensity and three-dimensional colored point cloud in ground object three-dimensional space. The three-dimensional laser radar has ability of synchronously acquiring polarization, reflection intensity information and colored point cloud, is compact and simple in structure, reliable and stable in performance, low in cost, moderate in precision, near-distance and capable of acquiring information multi-directionally and can be widely applied in acquiring three-dimensional colored point cloud data carrying polarization information and reflection intensity information in various indoor and outdoor environments, and the problem of contradiction among insufficient information amount, complex structure and big size of equipment, excessive accuracy and high cost whencurrent three-dimensional laser radar is applied in plant quantitative measurement and parameter inversion is solved.

The invention discloses a low-cost indoor 3D laser scanning ranging system based on an ARM, and a method. The system comprises a pedestal, a bracket, a laser transmitter, a camera, an ARM processing platform, a wireless communication module and an upper computer; the bracket is arranged on the pedestal through a steering engine and can rotate horizontally on the pedestal; the bracket is provided with the laser transmitter and the camera, the laser transmitter and the camera are located in the same horizontal plane, the laser transmitter is arranged on the bracket through a rotating device, andthus, the laser transmitter is enabled to rotate horizontally on the bracket; the ARM processing platform is arranged on the pedestal, used for image processing and distance calculation and connectedwith the camera; the wireless communication module is arranged on the pedestal, connected with the ARM processing platform and used for the ARM processing platform and the upper computer to mutuallytransit data and instruments. The system provided by the invention is low-cost and simple in structure, reduces noise in images and improves calculation efficiency and calculation precision.

The embodiment of the invention provides a joint replacement surgery navigation device and method, and relates to the technical field of medical equipment. The joint replacement surgical navigation device comprises an optical array assembly, a visual tracking mechanism and a handheld joint replacement surgical robot. The optical array assembly comprises a mounting rod and a plurality of optical markers, and the plurality of optical markers are fixedly mounted on the mounting rod. The visual tracking mechanism is used for acquiring degree-of-freedom pose information of the optical marker in a real three-dimensional space. The handheld joint replacement surgical robot comprises a bone drill, a grinding rod and a grinding head, one end of the grinding rod and the bone drill are fixedly installed, the grinding head is installed at the other end of the grinding rod, and an installation rod of the optical array assembly is fixedly installed on the grinding rod. The joint replacement surgery navigation device can achieve the technical effect of improving the surgery efficiency.

The invention discloses an automobile oil seal online cutting and size detecting platform comprising a platform, a control cabinet and an online cutting and size detecting system. The platform is installed on the top of the control cabinet. The online cutting and size detecting system is installed on the platform. The online cutting and size detecting system comprises a feeding module, a cutting module, a size detecting module and a sorting module. The feeding module comprises a feeding mechanism and a clamping mechanism. The cutting module comprises a cutting mechanism and a waste material collection mechanism. The size detecting module comprises a size detecting grabbing mechanism and a detecting mechanism. The sorting module comprises a sorting grabbing mechanism and a sorting mechanism. The invention provides the automobile oil seal online cutting and size detecting platform, the cutting, size detecting and sorting automated line production can be achieved for an oil seal through the oil seal online cutting and size detecting platform, the automobile oil seal online cutting and size detecting platform is appropriate in precision and high in efficiency, and the automated line production can be achieved.

The invention relates to a method for accurately simulating multi-antenna effect when a wireless mobile terminal receives signals, which comprises the following steps: according to characteristics of a multi-antenna wireless mobile terminal antenna, determining spacial angular spectrum characteristic parameter values and a pore-wavelength ratio of the wireless mobile terminal antenna; according to the spacial angular spectrum characteristic parameter values and the pore-wavelength ratio, calculating a beta factor of a multi-antenna related matrix of the wireless mobile terminal; and accordingto the multi-antenna related matrix established by the beta factor, calculating received signals of the wireless mobile terminal by taking the multi-antenna related matrix as a part of a whole channel matrix. The method can more objectively reflect functions and performance of eUE, and provide guarantee for the development, testing and authentication of the eUE. Simultaneously, the method also has the advantages of low environmental requirements, moderate accuracy, and simpleness, convenience and easy implementation.

The invention relates to the technical field of computer measurement, and in particular to a computer vision measurement system. The system comprises a hardware system part and a software system part.The hardware system part comprises a working platform. The end, away from the ground, of the working platform is in screw connection with a mounting bracket. A screw rod module mounting plate is welded at the end, far away from the working platform, of the mounting bracket. The end, far away from the mounting bracket, of the screw rod module mounting plate is in screw connection with an X-direction screw rod module. The end, far away from the screw rod module mounting plate, of the X-direction screw rod module is in screw connection with a Y-direction screw rod module mounting plate. A Y-direction screw rod module is connected to the outer wall of the Y-direction screw rod module mounting plate through screws. A Z-direction screw rod module is connected to the end, far away from the Y-direction screw rod module mounting plate, of the Y-direction screw rod module through screws. The computer vision measurement system has the advantages of being high in anti-interference capacity, highin efficiency, appropriate in precision and the like, realizes intelligentization, digitization, miniaturization, networking and multifunction, and has certain popularization value.

The invention discloses a method for monitoring the erosion amount and the erosion rate of a bank slope. The method comprises steps as follows: a monitoring datum point of the bank slope is built firstly; the datum point is taken as a datum, multiple section lines are emitted on the monitored bank slope by a total station, each section line is located on a section perpendicular to a river, all sections are parallel, and the distance between adjacent sections is recorded; measure points are emitted on each section line, and the distance between adjacent measure points in the same section line is recorded; the relative elevation of each measure point, relative to the datum point, in all sections is measured by a level gauge; all the measure points are repeatedly measured in the monitoring period; the erosion amount and the erosion rate of the bank slope are calculated according to data. According to the method, permanent monitoring can be performed, the monitoring is not influenced by deformation such as bank slope collapsing, huge rock alluviation and the like, and besides, the monitoring is accurate, simple and convenient.