39results about How to "Eliminate positioning effects" patented technology

A fiber optic mechanical splice connector including a single connector element operable for providing optical fiber alignment and strain relief includes opposed splice components that define first and second grooves for receiving the bare glass portions of mating optical fibers, as well as the coated or buffered portion of at least one of the optical fibers when the splice components are biased together by an actuator. The mating optical fibers are aligned while the coated or buffered portion of one of the optical fibers is retained within the same connector element, thus eliminating positioning problems that occur when separate connector elements are utilized for fiber alignment and strain relief. The splice components may be unbiased to allow removal of at least one of the mating optical fibers without destroying the connector assembly or potentially damaging the optical fibers.

The embodiment of the invention discloses a paper money processing device and method. Because the new and old degree or dirt degree causes little effect on an infrared image, a white light reflectogram, an infrared reflection image and a transmission image of paper money are collected through an optical sensor, and the sort of currency and the face value of the paper money are recognized through image feature template matching, the crown character number of the paper money is accurately positioned through the infrared reflection image and the infrared transmission image of the paper money on the basis, the crown character number can be accurately positioned on the white light reflection image after the positioning result is mapped to the white light reflection image, and then character segmentation and character recognition can be performed. The paper money processing device and method can effectively eliminate the effect on the positioning of the crown character number area when the crown character number area is dirty and thus effectively improve the recognition rate of the crown character number.

The invention provides a distributed optical fiber positioning structure and method used for long-distance monitoring and in particular relates to a distributed optical fiber positioning interference technology based on wavelength division multiplexing (WDM). The interference technology is characterized in that two rays with different wavelengths are injected into the same sensing optical fiber, are transmitted to the port of the optical fiber, are separated by a WDM device and respectively reach own reflecting terminals along own independent optical fiber paths; and two optical waves respectively form different interferences. The disturbance position information is obtained by comparing the spectrum characteristics obtained by the two interferences, of phase signals. The structure and the method have the following advantages: the structure is simple; the rear end does not have special requirements for signal processing; and by comparing the spectrum characteristics to obtain the position information, the impact of disturbing signal amplitude variation on detection is eliminated, the average position value can be obtained by utilizing a plurality of frequency points, thus obtaining high positioning precision.

The invention discloses a fused dual-Kalman filter navigation device based on an MEMS sensor and VLC positioning, and a navigation method. The navigation device comprises an MEMS sensor, an inertial navigation system (INS) module, a pedestrian dead reckoning (PDR) positioning module, a visible light communication (VLC) positioning module, an attitude extended Kalman filter (A-EKF), and a location extended Kalman filter (L-EKF); for the A-EKF, an error equation edited mechanically based on the INS is used as a system equation, an observation equation comprises update of observation of an accelerometer and a magnetometer, and attitude information is output to the VLC positioning module and the PDR positioning module so as to correct attitude impact; and for the L-EKF, position information of a two-dimensional plane is used as a system state vector, a pedestrian dead reckoned error equation is used as a system equation, and a VLC positioning result is an observation equation. The navigation device and navigation method solve a problem that VLC positioning is easy to be affected by device attitude and cannot keep positioning continuously if an optical signal is blocked, and eliminate the influence of attitude on VLC positioning.

The invention discloses a fingerprint locating method and server. A located coverage area is previously divided into a plurality of sub areas according to an architectural pattern, and fingerprint databases are established according to fingerprint information of known reference points of the sub areas on the situation of various visitor flow rates. In an actual locating process, the matched fingerprint database is firstly determined, current fingerprint information is compared with the fingerprint information in the determined fingerprint database, a plurality of reference points with the most similar fingerprint information are chosen, the positions of the chosen reference points are weighted and averaged to serve as the current position of a terminal, and location is finished. The rich fingerprint databases are established according to the architectural pattern and the visitor flow rates, and the matched fingerprint database is chosen in a targeted mode to be compared, so that the effects of buildings and the visitor flow density are eliminated. Thus, the accuracy of the fingerprint location is improved, and the environmental adaptability is improved.

The invention discloses a multi-channel surround sound dynamic binaural replaying method based on a body-sensing camera. The method includes steps: 1) inputting initial data, wherein the data comprises position parameters of virtual loudspeakers and head related transfer function data; 2) detecting motion data of the head of a listener in real time by employing the body-sensing camera, and calculating the space direction of the head after rotation; 3) calling a corresponding head related transfer function principal component decomposition coefficient according to the space direction of the head of the listener after rotation, multiplying input multi-channel surround sound signals by the coefficient, and performing filtering by employing a common filter group obtained by decomposition of head related transfer functions; and 4) mixing output signals of the common filter group, and obtaining binaural replaying signals of multi-channel surround sound for replaying by an earphone after filtering equalization processing. According to the method, the motion information of the head is obtained by employing the body-sensing camera, each virtual loudspeaker of the multi-channel surround sound is dynamically simulated in real time, and the similar effect of replaying the multi-channel surround sound by the loudspeakers is produced.

The invention discloses a visual inspection method for bottle packaging quality. The visual inspection method comprises the following steps: (1) acquiring a bottle image and carrying out preprocessing; (2) locating a support ring by using the strategy of longitudinal bottom-to-top searching; (3) carrying out self-adaptive calibration of a capping cover, a liquid level and a sprayed-code detection area; and (4) extracting a Blob candidate block by using a gray threshold segmentation algorithm and determining whether the capping cover, the liquid level and the sprayed-code detection area have defects according to determination rules. The visual inspection method overcomes the problems of slow speed, low efficiency and poor precision of artificial inspection; moreover, the method overcomes the problems that conventional visual inspection algorithms are complex, consume a long period of time in inspection and cannot meet demands on inspection of PET bottles on a high-speed production line, and improves the automation degree of bottle inspection.

The invention provides an indoor carrier phase positioning model construction method suitable for WiFi. The method comprises the following steps: firstly, extracting CSI (Channel State Information) information and preprocessing the CSI information to obtain a relatively stable carrier phase observation value; then establishing a target signal super-resolution parameter estimation model based on WiFi by utilizing a two-dimensional MUSIC (Multiple Signal Classification) algorithm, and extracting TOA (Time of Arrival) to construct a pseudo-range observation value; secondly, obtaining a pseudo-range and a carrier phase observation value of a direct path based on a positioning receiver and constructing a carrier phase ranging equation; and finally, constructing a TDOA (Time Difference of Arrival) differential positioning model by utilizing the carrier phase ranging equation based on a plurality of positioning receivers. According to the method, the carrier phase positioning model is effectively constructed and a model basis is provided for carrier phase accurate positioning.

The invention relates to a cracking method machining technology of an engine connecting rod. A large-end hole machined in a connecting rod blank is a round hole; the connecting rod blank where the large-end hole is machined is separated into a connecting rod body and a connecting rod cover in a cracking manner; the joint faces of the connecting rod body and the connecting rod cover are cracking faces which are not subjected to cutting machining; and connecting and locating between the connecting rod body and the connecting rod cover are achieved through engagement of the joint faces of the connecting rod body and the connecting rod cover. A connecting rod cracking device for connecting rod cracking comprises a vertical rack and a workbench mounted on the vertical rack, and further comprises an upper machine head and a lower machine head. The upper machine head is provided with an upper wedge part and an upper cracking pushing force mechanism used for driving the corresponding wedge part to move up and down, and the lower machine head is provided with a lower wedge part and a lower cracking pushing force mechanism used for driving the corresponding wedge part to move up and down. Extrusion force formed by opposite movement of the upper edge part and the lower wedge part is used for achieving connecting rod cracking. By means of the method of the technology, the cracking difficulty is reduced, the quality of the connecting rod obtained after cracking is guaranteed, production procedures and manufacturing cost are reduced, and good economical benefits are achieved.

The invention discloses a vibrating bar positioning method in a concrete vibrating process. The method comprises the following steps that through an optical fiber sensor, amplitudes and phase data ofeach monitoring point are collected, and the obtained amplitudes and the phase data are sent to a server; the server receives the amplitude data, the amplitude data of the monitoring points are subjected to time domain sliding average treatment on a time domain, and the amplitude data with the large fluctuation can be removed; after the server receives the phase data, the phase data are subjectedto transform treatment, and monitoring point frequency domain data are obtained; the position of the maximum amplitude point and the maximum amplitude value are obtained; the amplitude maximum frequency of the monitoring point corresponding to the maximum amplitude point is matched with the vibrating bar frequency, the position, the amplitude, the time and other information of the monitoring points are written into a database; and it is ensured that the position where the monitoring points are located is the vibrating bar actual position. Through the method, the position of the vibrating bar is positioned, the influence of the construction site external environment can be effectively removed, and the vibrating bar positioning precision can be improved.

The invention discloses an indoor positioning method, which comprises the following steps of: in an offline stage, according to an indoor structure and layout, performing indoor region division, establishing corresponding coordinate axes, setting reference points in the regions, acquiring RSSI (Received Signal Strength Indicator) of wireless signals by using different types of equipment at the reference points, and forming fingerprint vectors so as to construct a fingerprint database; fitting the RSSI of the wireless signal by the BP neural network; performing an electronic map, and storing information in a database; in the online positioning stage, firstly, performing region positioning, and determining a to-be-positioned point region; performing position positioning in the region, and determining the position coordinates of the to-be-positioned point; according to the target information, determining a reference point set required to reach the target position, and then combining the current position information to determine whether the current position advances towards the target position; and updating the fingerprint database in real time according to various feedback information. According to the invention, the fingerprint database can be updated in time, the real-time performance of the fingerprint database is enhanced, and the positioning precision is high.

The invention discloses a terminal node positioning device and method based on ZigBee. The method comprises the following steps of: extracting data of two different wake-up devices with highest RSSI (Received Signal Strength Indicator) strength values from wake-up device signals received by certain terminal node; and calculating the ratio of distances from the certain terminal node to the two different wake-up devices according to an equation shown in a drawing, and calculating the position of the terminal node according to the distance ratio and known positions of the two different wake-up devices. Thus, a novel environment-independent positioning algorithm is adopted by the method, so that the influence on positioning caused by environments is eliminated, and a relatively-accurate positioning calculation result is realized. The method can be widely applied to occasions, such as underground person positioning and tunnel person positioning.

Embodiments of the invention disclose an image processing method and electronic equipment. The method comprises the following steps of: obtaining a first image acquired by a first image acquisition device of the electronic equipment and a second image acquired by a second image acquisition device; determining the first image, comprising a target object, acquired by the first image acquisition device; determining a feature area, in the second image, corresponding to the target object according to the first image; and filtering the feature area in the second image to carry out space orientation.

The invention discloses an indoor non-line-of-sight rapid positioning method based on UWB. The problem that indoor non-line-of-sight positioning still needs to be improved is solved. The method comprises the following steps: 1, constructing RSSI vectors R1 and R2 of an auxiliary node, setting a fitness function F for judging positioning matching, a judgment threshold [epsilon] and an error angle E[beta], and setting an initial value of an accumulated rotation angle [alpha] to be 0; 2, determining the rotation of the auxiliary node according to whether the fitness function F is smaller than a discrimination threshold [epsilon] or not, and recording a rotation angle [theta]; 3, updating the RSSI vector R1 and the accumulated rotation angle [alpha] according to the rotation angle [theta]N of the node N of the first pair of auxiliary nodes; and 4, setting the intersection point coordinate R of the two pairs of auxiliary nodes as the prediction position of the unknown node A, and calculating the fuzzy point of the tail node through the error angle E[beta]. According to the technology, the position of the unknown node can be quickly and efficiently determined by using the position update of the auxiliary node.