2219results about How to "Regulation stability" patented technology

An automatically adjusting magnetic resistance unit for an exercise device such as a bicycle trainer, in which the degree of resistance is automatically and non-linearly adjusted in relation to the rotational speed of a rotating member caused by the input of a user. The rotating member may be in the form of a flywheel having a number of supports extending between a hub and a rim. The supports define longitudinal grooves which slidably retain magnets that are biased inwardly toward the hub by biasing members. An electrically conductive member is located adjacent the flywheel. As the flywheel rotates in response to rotation of the bicycle wheel, the magnets interact with the conductive member to establish eddy currents that provide resistance to the rotation of the flywheel. The speed of rotation of the flywheel increases as the speed of rotation of the bicycle wheel increases, and centrifugal forces act on the magnets to cause the magnets to slide outwardly along the grooves in opposition to the bias of the biasing members. The outward movement of the magnets causes outward movement of the eddy current forces, to increase the resistance provided to rotation of the flywheel and the bicycle wheel. The variable resistance due to the increased or decreased rotational speed of the flywheel is smooth, based on the constant interaction of the counteracting forces of the biasing members and the centrifugal forces acting on the magnets.

An automatic exposure method based on a brightness column diagram includes the following steps: (1) dividing an input image into N*N image blocks; (2) calculating the average imaging brightness; (3) calculating and accounting the column diagram; (4) dividing the bright column diagram into three areas; (5) dividing an underexposure area into m sub-areas; (6) dividing an overexposure area into n sub-areas; (7) for the N*N average bright values, judging whether each average brightness value falls in each sub-area of the underexposure area or the overexposure area; (8) calculating the overexposure value; (9) calculating the underexposure value; (10) adjusting the exposure time. A device for applying the automatic exposure method includes an imaging sensor, an image processing module, a column diagram accounting module and an exposure calculating module. The invention can obtain quicker and more accurate automatic exposure adjustment under different brightness and contrast conditions.

A medical apparatus is described for providing visualization of a surgical site. The medical apparatus includes an electronic display disposed within a display housing. The medical apparatus includes a display optical system disposed within the display housing, the display optical system comprising a plurality of lens elements disposed along an optical path. The display optical system is configured to receive images from the electronic display. The medical apparatus can include proximal cameras mounted on a frame, the cameras configured to provide a view of a surgical site from outside the surgical site. The display housing can have a height that is larger than its depth.

Provided is a tunable earphone, including an earphone shell, a sound generation device and a tuning device. The earphone shell disposes a pivot hole and a number of tuning holes. The sound generation device is located in the earphone shell. The tuning device includes a tuning member and a damping body. The tuning member includes a covering body being adjustable for covering all or part of the tuning holes and a connecting rod. One end of the connecting rod is fixedly connected to the covering body, and the other end of the connecting rod extends out of the earphone shell. The damping body is placed into the corresponding tuning hole for auxiliary adjusting the pressure of the low sound inner cavity, so that the present tunable earphone can generate the different sound effect of the low frequency to satisfy the different users' needs.

The invention relates to a centralized heating whole-network heat balance control method, in particular to a control system which is charged on area, which can eliminate the heat imbalance of the whole network and balance the heating effect. The control method adopts different control strategies for a heat source and two links of a primary side in the heating system so as to meet the requirement of users. For the heat source, the online prediction of the heat load is realized according to external temperature variation, and a running instruction is supplied for the heat source; a uniform control strategy is adopted for a primary network, automatic adjustment of a primary valve of a heat exchanging station of the heat network can be realized, a weighted value can be manually given to a special heat exchanging station, and the heat imbalance degree is used for analyzing and evaluating a whole-network heat balance control effect; and the control method can effectively solve the problems of the heating system such as imbalance heat and energy waste, a great amount of manpower and material resource can be saved in the adjustment process of the heat network, and the balance and consistency of the heat supply effect can be guaranteed.

A marine electronic device such as a chartplotter which includes a display; a location determining component; and a processing system for receiving location data from the location determining component and for causing information to be displayed by display. The processing system causes the display to display information which assists an operator in navigating and ascertaining characteristics of bodies of water, objects on nearby shores, and other vessels.

Low-frequency bandwidth extension in the form of dynamic electrical equalization may be applied to loudspeakers so long as the excursion capability of their drive units as well as velocity limits of any port(s) or excursion limits of any associated passive radiator(s), and the power limits of the drive units are not exceeded. The bandwidth extension maximizes low-frequency bandwidth dynamically such that excursion is fully utilized over a range of drive levels, without exceeding the excursion limit. Additional limiting control is available for port air velocity or passive radiator excursion, and loudspeaker drive unit electrical power. The system applies to open back, closed box, vented box, and more complex box constructions consisting of combinations of these elements for loudspeaker designs using design parameters appropriate to each system.

An active suspension system senses roadway defects and adjusts an active and controllable suspension system of the vehicle before tires come in contact with the defect. The active suspension system identifies a type of defect or debris, e.g., pothole, bump, object, etc., along with the size, width, depth, and / or height information of the defect to more accurately control operation of the suspension system to prepare for, or avoid contact with the roadway defects and obstacles. Imaging techniques are employed to identify the defect or debris. Operation of a serviced cruise control system is controlled to enhance passenger safety and comfort.

The invention concerns an adjustable recoil pad for a small arm, in particular, a rifle, with a base plate that can be adjustably affixed to a stock part of the small arm, a bottom plate which is adjustably mounted on the base plate, and at least one end part that can be affixed to the bottom plate. A simplified adjustment with a large number of adjustment possibilities is made possible in that the bottom plate is arranged so it can swivel about a transverse axis on a connecting piece, which is displaceably guided via guide elements on the base plate, and can be affixed in a desired position by at least one retaining screw.

The invention discloses an OLED module Gamma adjustment and calibration method and device wherein the device comprises a PC, a controller, an image generator and an optical detection instrument. The method comprises the following steps: obtaining the theoretical brightness values of a target binding point according to the brightness value of the highest gray level W255 and the brightness value of the lowest gray level W0, and determining the target brightness value and the target color coordinate value of the target binding point; adjusting the R and G register values so that the color coordinate value of the target binding point falls within the error range of the target color coordinate value; adjusting the R, G and B register values so that the brightness value of the target binding point falls within the error range of the target brightness value; According to the invention, it is possible to adjust the brightness and coordinate of a finished OLED module bounded with IC so that the brightness meets a Gamma 2.2 curve, that the color temperature conforms to the CIE 1931 standard, and that the registers are solidified and adjusted to the EEProm of the OLED module's IC, making the OLED module present the visual curves most consistent with the human eye and achieve the display effect with a specific color temperature.

The invention provides a virtual synchronous generator virtual inertia and virtual damping coefficient adaptive control method, which relates to the technical field of smart grid and intelligent algorithms. Firstly, the inverter based on the virtual synchronous generator is modeled, and the correlation between the output frequency of the inverter and the virtual inertia J and the virtual damping coefficient D is obtained. Then the fitness function of the adaptive control method of virtual inertia J and virtual damping coefficient D based on the improved particle swarm optimization algorithm isdetermined. Finally, the improved particle swarm optimization algorithm is applied to the active power. In the frequency control part, the real-time adaptive control of virtual inertia J and virtualdamping coefficient D is realized in order to minimize the frequency deviation and stabilize the system. The invention provides a virtual synchronous generator virtual inertia and virtual damping coefficient real-time adaptive control method, which fully utilizes the characteristics of the virtual inertia and introduces the virtual damping coefficient, so that the inverter is more stable and the frequency offset is smaller.

When a video signal is inputted to a projector (10) through a video input terminal, a luminance peak value of an image of the video signal is detected by an image-analyzing circuit (61) to be outputted to a CPU (71). A gain-adjusting circuit (63) adjusts a luminance signal in the video signal based on a command from the CPU (71). The CPU (71) determines a gain adjustment amount based on the luminance peak value of the image obtained by the image-analyzing circuit (61) and outputs the result to the gain-adjusting circuit (63). For instance, when the luminance peak value (lp) of the image is 50% of the upper limit (Imax) thereof, a gain-adjusting amount AG is doubled In this case, an illuminating light volume of a light valve (44a) has to be reduced to 50%, which is achieved by light-attenuation by a light-source lamp (21) and an open / close light shield (23).

The invention provides a dodging special-shaped lens used for shaping semiconductor laser leams. The lens comprises an entrance face receiving laser injection and an exit face allowing laser ejection, the entrance face which is a half-cylindrical curved surface and the exit face which is an aspheric surface are arranged oppositely, and the distance between two ends of a generatrix of the aspheric surface is larger than that of the half-cylindrical surface, so that lasers injected through the entrance face are enabled to be wholly injected onto the exit face. The dodging special-shaped lens is simple in structure, easy for batch processing, low in cost and especially capable of well realizing adjusting of divergence angles of laser beams output by semiconductor lasers of various wavelengths and homogenized adjusting of Gaussian curve distribution of light energy output by lasers, and utilization rate of laser energy is improved while good dodging and aberration-eliminating performances are provided.

A support apparatus for suspending a monitor with a back has a mounting seat, a support arm assembly, an extending arm and a mounting device. The support arm assembly is mounted on the mounting seat and has a proximal bracket, a positioning device, a upper arm, a lower arm, a loading element and a distal bracket. The extending arm is connected to the distal bracket. The connector is connected to the extending arm, connects to the back of a monitor and has a mounting assembly and an adjusting assembly. The mounting assembly is connected to the extending arm and has a connector and an axial connector. The adjusting assembly is connected to the mounting assembly and has an adjusting device and a connecting seat.

The invention relates to an automatic exposure control method and device based on an FPGA and suitable for space exploration imaging. The method includes the steps that the current-frame image average brightness is acquired through the main current-frame image average brightness, time of exposure is adaptively selected according to whether a difference value between the current-frame image average brightness and the expected image average brightness is positive or negative and is large or small, continuous frames are adopted for continuous loop iteration, and therefore the current-frame image average brightness reaches the expected image average brightness. The automatic exposure control device for conducting the automatic exposure control method comprises an optical lens, an APS sensor and the exposure control FPGA. According to the method and device, the technical problems existing in excessive exposure of a target image, segmentation of the target image and balance between the automatic exposure speed and stability in the existing space exploration imaging technology are solved, the image contrast ratio is increased, faster, more stable and more accurate automatic exposure control can be conducted in various space exploration light environments, and adaptive ability in the space exploration environment imaging process is improved.

An image display apparatus includes: an image signal processing unit which adjusts an input grayscale values included in an input image signal according to a predetermined grayscale characteristic; a display unit which displays an image based on an image signal included in an output grayscale value adjusted by the image signal processing unit; and a grayscale characteristic changing unit which changes a correlation between the input and output grayscale values defined based on the grayscale characteristic.

The invention relates to the field of the laser-electricity arc composite welding, in particular to a laser-electricity arc composite welding head adjusting device. The laser-electricity arc composite welding head adjusting device comprises a laser welding head, an arc-welding gun, an X-axis adjusting mechanism, a Y-axis adjusting mechanism, a Z-axis adjusting mechanism and a connecting flange. The laser-electricity arc composite welding head adjusting device is characterized in that the connecting flange is connected with the laser welding head. The X-axis adjusting mechanism is connected with an angle-adjusting plate. The angle-adjusting plate is provided with two homocentric arc-shaped slot holes. A screw pin I and a screw pin II are arranged in each arc-shaped slot hole. The screw pin I and the screw pin II are respectively connected with the arc-welding gun. The screw pin I and the screw pin II are distributed along the central axis of the arc-welding gun. When the welding gun can be adjusted to correspond to the angle of a laser beam, the welding gun is rotated in a centre of a welding stick tip end. Compared with prior art, the laser-electricity arc composite welding head adjusting device has the advantages of that angles of the welding gun and locations of the welding gun can be adjusted conveniently, wherein the angles correspond to the laser beam and the locations are along an X direction, a Y direction and a Z direction. Finally, good combination of a laser heat source and an arc-welding heat source can be achieved. The laser-electricity arc composite welding head adjusting device has an important significance on guaranteeing composite welding quality and good shaping effects.

The invention relates to systems and methods that provide a user interface for use with an electronic trading system. The interface displays a bid price axis and an ask price axis, as well as corresponding sizes, and an indication of the inside market. When the inside market changes in response to changing market conditions, the indication of the inside market changes locations before being restored to its original location by shifting the bid and ask prices in a direction parallel to the bid or ask price axis. The user may enter trade commands at different price levels using an input device. In order to help prevent such trade commands from being entered at erroneous price levels, the system locks a pointer associated with the input device to a price the user points to during the shifting process, unless the pointer is moved away from that price.

The invention belongs to the technical field of automobile steel, and in particular relates to a double-phase twinborn induced plastic super-strength automobile steel plate and a preparation method thereof. The steel plate comprises the following chemical elements in percentage by weight: 0.3-0.6% of C, 8-12.00% of Mn, 1.00-3.00% of Al, less than or equal to 0.020% of P, less than or equal to 0.02% of S and the balance of Fe and inevitable impurities. The steel plate can be selectively cold-rolled with 5-25% of rolling reduction after warm-rolling at 100-250 DEG C, or a hot continuous rolled plate coil is cold-rolled after being softened and annealed. The yield strength of the steel plate is greater than or equal to 650MPa, the tensile strength is 1000-1500MPa, the extension rate of short continuous annealing is 15-25%, the product of strength and elongation is 20-35GPa%, the extension rate obtained after cover-type prolonged annealing is 25-40%, and the product of strength and elongation is 30-40GPa%.

The invention provides an adjustable head-mounted displayer. The adjustable head-mounted displayer is simple and compact in structure and capable of well adapting to consumers with hyperopia or myopia, and the universality is improved. The adjustable head-mounted displayer comprises a main frame, a display screen, a left lens frame and a right lens frame, wherein the left lens frame is internally provided with a left lens tube with a left lens; the right lens frame is internally provided with a right lens tube with a right lens; the left lens frame and the left lens tube are provided with spiral track mechanisms respectively, and the spiral track mechanisms are matched with each other; the right lens frame and the right lens tube are provided with spiral track mechanisms respectively, and the spiral track mechanisms are matched with each other; the main frame is further provided with a left adjusting component and a right adjusting component. According to the adjustable head-mounted displayer, stepless adjustment of the distance between the focus point of the left lens on the Z-axis and the corresponding eyeball of a user and the distance between the focus point of the right lens on the Z-axis and the corresponding eyeball of the user can be achieved, and stepless adjustment of the distance between the focus point of the left lens and the display screen and the distance between the focus point of the right lens and the display screen can be achieved, so the adjustable head-mounted displayer can be well applicable to the consumers with hyperopia or myopia, and the universality is improved.