1298results about How to "Reduce drift" patented technology

The invention discloses a shift register electrode, a grid electrode driver, an array substrate and a display device, relating to the technical field of liquid crystal display. The electrode comprises a pull-up module, a first pull-down module, a second pull-down module, a pull-up drive module, a pull-down drive module and a reset module, wherein the first pull-down module is used for outputting shut-off signals to an output terminal according to signals input from a clock block signal input terminal and signals input from a reset signal input terminal; the second pull-down module is used for outputting shut-off signals to the output terminal according to signals input from a clock signal input terminal; and the phases of signals input from a signal input terminal are the same with those of the signals input from the clock signal input terminal, and the phases of the signals input from the clock signal input terminal are the same with those of the signals input from the clock block signal input terminal. The shift register electrode can be used for effectively avoiding the defect of threshold voltage drift caused by bias stress on a grid electrode, and can reduce noises generated during outputting voltages.

The invention discloses a method for identifying abnormal motion in a video. The method comprises the steps that an area of which the pixels have certain change is extracted from a video sequence through a foreground extraction module; a movement target detected by the foreground extraction module is judged through a pedestrian judgment module, and a rectangular box judged to be a pedestrian is kept and transmitted to a target tracking module; each identified target in the scene is continuously tracked in a multi-target way through the target tracking module; the posture of each target tracked by the target tracking module within each frame of time is judged through an abnormal behavior trigger module and behavior analysis is performed on the abnormal behavior; and the abnormal behavior is processed and computed into a video segment through a behavior identification module, and the abnormal behavior is alarmed and the behavior type of the abnormal behavior is identified. The invention also discloses a system for identifying the abnormal motion in the video. The problem that abnormal behavior (falling down) detection of massive video data cannot be performed in real time can be solved and the detection accuracy can be greatly enhanced.

An optical sensor and a method of manufacturing such as sensor are provided. The sensor includes a lead optical fiber with a single piece optical element joined permanently joined to its forward end. The optical element defines a spacer with a cavity therein at one end, and a diaphragm at the opposite end. The diaphragm is flexible in response to a parameter and the sensor defines a sensing Fabry-Perot resonator.

A magneto elastic sensor having a longitudinally extending shaft like member which is subject to a load, is provided. A magneto-elastically active region is directly or indirectly attached to or forming a part of the member in such a manner that the mechanic stress is transmitted to the active region. A magnetically polarized region of the active region becomes increasingly helically shaped as the application stress increases. A magnetic field sensor means is arranged approximate the at least one magneto elastically region for outputting a signal corresponding to a stress induced magnetic flux emanating from the magnetically polarized region. The magnetic sensor means is configured for determination of a shear stress and/or of a tensile or compressive stress. In particular, the sensor means comprises at least one direction sensitive magnetic field sensor, which is arranged having a predetermined and fixed spatial coordination with the member.

The invention discloses a target tracking method based on correlation filtering and color histogram statistics and an ADAS (Advanced Driving Assistance System). The target tracking method comprises the steps of extracting HOG (Histogram of Oriented Gradients) features and color histogram statistical information of a target region, and generating an initial tracker; extracting HOG features and color histogram statistical information of the next image frame according to the initial tracker, and performing convolution operation on a feature image by using a current filter h<t> to acquire a template response value f<tmpl>(x); extracting the color histogram statistical information of the image frame, and calculating a histogram response value f<hist>(x) by using a current color histogram weight vector beta<t>; fusing the template response value f<tmpl>(x) and the histogram response value f<hist>(x) to acquire a final response value f(x) of a target, and performing target detection and positioning on the target according to the final response value f(x). According to the invention, the complementarity of two tracking algorithms is utilized, the speed and the accuracy of a tracking algorithm can be simultaneously ensured, a condition of drifting of the tracking target is greatly reduced, and the target tracking method has good application prospects in a driving assistance system.

A method for registering two or more three-dimensional (3D) point clouds. The method includes, with a surveying instrument, obtaining a first 3D point cloud of a first setting at a first position, initiating a first Simultaneous Localisation and Mapping (SLAM) process by capturing first initial image data at the first position with a camera unit comprised by the surveying instrument, wherein the first initial image data and the first 3D point cloud share a first overlap, finalising the first SLAM process at the second position by capturing first final image data with the camera unit, wherein the first final image data are comprised by the first image data, with the surveying instrument, obtaining a second 3D point cloud of a second setting at the second position, and based on the first SLAM process, registering the first 3D point cloud and the second 3D point cloud relative to each other.

An improved microscope stage mount with built-in fiduciary markers is used for fluorescence microscopy, and comprises: (a) an optically-transparent glass plate adapted for specimen mounting and microscope viewing and comprising a specimen mounting area; and (b) a defined and ordered, two-dimensional microscopic array of fiduciary markers, wherein the markers are polymeric pillars affixed to the plate about the specimen mounting area, wherein the markers provide a three-dimensional spatial reference for the specimen.

A polymeric membrane for ion sensitive measurement comprising a polymer, a lipophilic salt and at least two ionophores selective for different chemical species. The membrane may be used in a pseudo reference for measurement of a plurality of ions.

The invention relates to an operating environment sensing based active control system for a boom sprayer, which comprises an outside information sensing module, a running parameter measuring module, an active spray control system module and a running parameter real-time control module. CAN (controlled area network) bus communication of field-operation natural wind speed measured with a two-dimensional ultrasonic wind speed sensor and advancing speed of the boom sprayer measured with a rotary encoder is realized, and spray parameters are calculated through a precision active spray controller. A spray parameter regulating controller is used for acquiring pesticide pressure, fan air volume and spray angle information in real time so as to complete respective PID (proportion integration differentiation) control, and accordingly, the spray volume is guaranteed, drift-reduced spray and fine droplet penetrability are realized, and the effect of settling droplets on plant leaves is improved. The spray system based on external environment sensing and automatic active operating parameter control is high in practical value, simple in structure, convenient in operation and convenient in application.

The invention discloses a method for reducing positioning drift of a Big Dipper satellite navigating and positioning device. The method comprises the following steps: (1) acquiring positioning data received within a certain time period and sequencing the data according to positioning time; (2) calculating the distance between two adjacent positioning points from the first positioning data point, and calculating the running speed of a vehicle according to the time interval between the two positioning points; and (3) deleting the two positioning points if the running speed of the vehicle is over-high and exceeds the possible maximum value in reality. According to the method, the positioning data information in a finally obtained positioning data list is relatively accurate positioning information free of the drift point, the positioning drift of the Big Dipper satellite navigating and positioning device can be reduced and the accuracy of the positioning data can be improved.

The present invention relates to a magnetoresistive sensor for measuring a magnetic field. A calculation of the sensitivity to external magnetic fields is provided, and it is shown to be related to the shape anisotropy of the magnetoresistive sensing elements. Moreover, it is shown that sensitivity may be made highest when the shape of the magnetoresistive element is long parallel to the sensing axis, and a magnetic bias field strong enough to saturate the magnetoresistive element's magnetization, H_cross, is applied perpendicular to the sensing axis. A monolithic permanent magnet is provided to generate the H_cross and it may be applied at an angle in order to counteract non-ideal fields along the sense axis direction. The high sensitivity magnetoresistive element can be used in many electrical form-factors. Six exemplary bridge configurations are described herein.

The embodiment of the invention discloses a display panel, a driving method and a display device. The display panel comprises a pixel circuit and a light-emitting element; the pixel circuit comprisesa data writing module, a driving module, a compensation module and a first light-emitting control module; the driving module is used for providing driving current for the light-emitting element and comprises a driving transistor, and the driving transistor is an NMOS transistor; the data writing module is used for selectively providing a data signal for the driving module; the compensation moduleis used for compensating the threshold voltage of the driving transistor; the first light-emitting control module is used for selectively providing a first power supply signal for the driving module;the working process of the pixel circuit comprises a bias stage, in the bias stage, the driving transistor receives a bias signal, and the bias signal is used for adjusting the bias state of the driving transistor. According to the embodiment of the invention, the threshold voltage drift of the driving transistor can be weakened, the stability of the threshold voltage of the driving transistor isimproved, and the display uniformity of the display panel is improved.

The invention discloses a video disc fixing laser. A video disc laser crystal and a laser cavity resonator output lens form a laser cavity resonator; the focus of one of two paraboloid reflectors positioned in a conjugating way is positioned in the video disc laser crystal; a pump light sent by a semiconductor laser stack array is firstly collimated by a pump light collimator, then is imaged on the video disc laser crystal through the two paraboloid reflectors and is output as laser formed through the laser cavity resonator at last. The invention adopts the method of semiconductor stack array and has high efficiency, long service life and convenient equipment maintenance. A double-paraboloid pump system positioned in the conjugating way reduces the requirement for the collimation degree of the pump light and realizes high-efficiency imaging of the pump light. Each secondary pump luminous spot has regular and symmetrical shape, reasonable power density distribution and small position excursion of the light luminous spots for each imaging, and high-efficiency and even pumping is realized. The equipment has smaller volume, simple mechanical structure and adjustment and lighter weight, and is convenient for industrial application.

The invention discloses a micromachine-based electromagnetic excitation resonant pressure sensor, and relates to a micromachine sensing technology. The sensor is provided with three groups of resonators which are clamped by anchor points on a pressure membrane, arranged on a diagonal line of a frame, and provided with electrodes. The resonators applied with excitation signals are excited by magnetic field force under the action of an external magnetic field; and when pressure to be tested is present outside, the pressure membrane generates strain, and the strain is transmitted to the resonators through the anchor points to change the rigidity of the resonators, so that the natural frequency of the resonators is changed, and the pressure to be tested outside can be measured by detecting the frequency of output signals of vibration pickup electrodes. The sensor has two packaging modes, and is subjected to stress isolation through a ceramic ring of which the coefficient of thermal expansion is basically same as monocrystalline silicon. The resonators of the sensor work in a horizontal vibration mode; the shift caused by external factors such as temperature and the like is inhibited through differential output, and the sensitivity is improved; and the resonators are released by a heavy boron-diffusion self-stop corrosion technology, a process is simple and the consistency is high.

The invention provides a method and a system for preventing bias flowing of a refrigerant in a multi-split air conditioner and the multi-split air conditioner. The method for preventing the bias flowing of the refrigerant in the multi-split air conditioner comprises the steps of obtaining the superheating degree of each indoor heat exchanger; comparing the obtained superheating degree with the target superheating degree, adjusting the open degree of an expansion valve when the obtained superheating degree is not equal to the target superheating degree, and enabling the superheating degree of each indoor heat exchanger to tend to be equal to the target superheating degree; correcting the target superheating degree if the superheating degree of each indoor heat exchanger is still not equal to the target superheating degree when the maximum time for adjusting the open degree of the expansion valve is up to a preset time, and then adjusting the open degree of the expansion valve according to a comparison result of the superheating degree of each indoor heat exchanger and the corrected target superheating degree. According to the method for preventing the bias flowing of the refrigerant in the multi-split air conditioner, provided by the invention, the engineering installation situation and the actual load of indoor units are comprehensively considered, the open degree of an electronic expansion valve can be intelligently controlled, the bias flowing of the refrigerant is reduced, and the refrigerating effect of the indoor units is balanced.

The invention discloses a vehicular visible light wireless digital voice communication system. The vehicular visible light wireless digital voice communication system comprises a sending module and a receiving module. The sending module comprises a digital audio acquisition unit, an RS coding unit, a PWM (pulse width modulation) unit, an LED (light emitting diode) drive unit and an LED transmitting unit, which are connected successively in circuit; the receiving module comprises a PIN photoelectric detection unit, a signal extraction unit, a PWM modulation unit, an RS decoding unit and a digital audio output unit, which are connected successively in circuit. The wireless digital voice communication system realizes instant voice communication between strange vehicles; an LED-based lamp is integrated with automobile lighting and communication without the need of an additional signal emission source installation space and occupation of scarce frequency spectrum resource. The voice signal transmission is high-speed and reliable, high in integration level, strong in anti-interference ability and low in cost, and bigger communication distance and more reliable communication are realized; moreover, a detector has high accuracy, high responsivity, low dark current, higher communication rate, stronger anti-interference ability and high reliability of a transmission channel.

The invention relates to a dynamic loss reduction method for a distribution network and a synthesized loss reduction system of a distribution network. A principle that an electric field and a magnetic field are mutually symbiotic and affected is applied for dynamically realizing electromagnetic balance; the treatment of'peak load shifting'is carried out on the current difference value between three-phase unbalanced currents caused by the dynamic unbalance of the power used by a three-phase load at the secondary side of a distribution transformer so as to lead the current difference value to approach balance, reduce a zero sequence current and the unbalance degree of the three phases, and restrain a harmonic, thereby realizing the self loss (loss on transmission) of the distribution transformer and the line loss (the copper loss of the line) at the first side and the secondary side of the distribution transformer; the synthesized loss reduction system of the distribution network realizes the synthesized loss reduction management of the distribution network, the loss on transmission of the distribution transformer as well as the automatic measuring and accounting on the data of the copper loss of the line at the first side and the secondary side thereof; the system also realizes the remote automatic collection on the power data of the distribution transformer in the same time as well as the accounting of the line loss of a distribution line, calculates and accounts the line loss of the distribution network, calculates and analyzes the loss reduction as well as analyzes the benefits of energy saving and emission reduction.

The present invention relates to a method of rapidly and repeatably bringing sharp objects into close proximity to a particular region of interest of a sample with high precision and accuracy in two or three dimensions using a laser guided tip approach with three dimensional registration to the surface.

The invention discloses a FBAR (film bulk acoustic resonator) substrate and a preparation method thereof. The FBAR substrate is of a W/piezoelectric film/W/ DLC/air gap/Si structure. The FBAR substrate with a W/piezoelectric film/W/ DLC/air gap/Si structure has the characteristics of high frequency, high Q (quality) and good frequency stability. The FBAR substrate can be used for manufacturing filters and duplexers and the like in wireless communication systems, and also can be used for manufacturing high-performance sensors in combination with sensitive films.