673results about How to "Avoid frequent switching" patented technology

The invention provides a mixed switch power converter, comprising a reference voltage and reference current generation unit, a PWM/PFM control unit, a power switch driving unit, a power switch and output circuit, and an auto-switch control circuit. The reference voltage and reference current generation unit is used for generating a reference voltage signal and a reference current signal; the PWM/PFM control unit is used for obtaining a voltage feedback signal and a current feedback signal, receiving the reference voltage signal and the reference current signal, outputting a first detection signal and a voltage detection signal and outputting a PWM/PFM control logic signal according to a received working model selection signal; the power switch driving unit is used for receiving the control logic signal and outputting a driving signal; the power switch and output circuit is turned on and turned off according to the driving signal; and the auto-switch control circuit is used for receiving the first detection signal and the voltage detection signal, counting the first detection signal and the voltage detection signal in a predetermined time and outputting the mode selection signal when the counting result reaches a predetermined threshold value. The invention also provides the auto-switch control circuit. The invention can improve the transfer efficiency and the anti-interference performance of the converter within the whole load range.

For the automatic choice of a hearing program, a hearing aid (1) detects whether it is located in the immediate vicinity of an external transmitter (10, 10′). The transmitter (10, 10′) generates a transmitter-specific signal so that an assignment of different transmitters can be made. In addition, in the case of the hearing aid (1), the current time of day and the day of the week can also influence the choice of the active hearing program.

The invention discloses an AP (application process) switching method used in WiFi (wireless fidelity) communication, and provides a WiFi access point switching method for dynamically adjusting threshold values in real time. The AP switching method is characterized in that after a mobile terminal detects received signal intensity of a currently connected AP, the signal intensity is compared to a scanning threshold value, scanning is started if the signal intensity is lower than the scanning threshold value, and scanned adjacent AP information is dynamically stored; the mobile terminal continues detecting received signal intensity of the currently connected AP, the signal intensity is compared to a switching threshold value, AP switching is realized if the signal intensity is lower than the switching threshold value, and a switching object is an AP access point with the highest stored signal intensity; and the scanning threshold value and the switching threshold value are adjusted simultaneously. By the AP switching method, the mobile terminal can be quickly switched to the optimal AP when moving within a coverage area of a WiFi network, and satisfactory access service and communication effect are obtained.

A multi-attribute handover judging method for a heterogeneous vehicle communication network comprises the following steps: a handover management entity reads information on a candidate network in a field network report buffer entity, and the diameter of the coverage region of the candidate network is calculated; a mobility prediction information management entity acquires position information and speed information of a mobile user, and sends the position information and the speed information to the handover management entity; possible residence time and throughput capacity in each neighbor access network of the mobile user is estimated, when the throughput capacity during handover is higher than the throughput capacity in a normal state, the candidate network is added in an alternative list; an optimal target access network is determined to be switched into the network by the handover management entity via an analytic hierarchy process and according to service quality requirements; when the intensity of the current switch-in network signal is lowered to a threshold value, a handover execution instruction is sent to carry out handover. The multi-attribute handover judging method provided by the invention avoids unnecessary handover when a traveling vehicle passes through a region covered by heterogeneous access network, reduces handover delay and ensures the continuity of the communication.

The invention discloses a control method and a system of wireless client terminal roam and a wireless access controller. The method comprises the following steps: an AP receives a detection request message sent by a wireless client terminal, and measures the RSSI of the message; the detection request message and the RSSI are sent to an AC; if the AC finds out that the wireless client terminal is not connected with any AP, AP is allowed to respond to the detection request message; if the AC finds out that the wireless client terminal is connected with other APs besides the AP, the AC determinates whether the APs are allowed to respond to the detection request message or not according to the RSSI and a preset strategy. The invention realizes that the AC controls the wireless client terminal roam.

The invention discloses a de-burring device for a wheel. The de-burring device comprises a frame, an air cylinder, a motor, a corner cylinder and the like. Two lower hairbrushes auto-rotate at the same rotation speed and in different rotation directions and are driven to orbit by a lower motor I at the same time; and similarly, two upper hairbrushes auto-rotate at the same rotation speed and in different rotation directions and are driven to orbit by an upper motor I at the same time. When the de-burring device is used, the automatic rotating hairbrushes can be in contact with all parts capable of being brushed on a rear cavity of the wheel at the respective maximum linear speed; and the problems of low linear speed of the center hairbrushes and poor de-burring effect of the flange corner in the conventional large disc are avoided and the negative influence on the motors due to frequent reversing of the hairbrushes of the conventional disc in the de-burring process is avoided.

The invention discloses a method for scratching a target object from a digital picture, which belongs to the technical field of the image processing and the human-computer interaction. The method comprises the following steps that: a plurality of nodes are arranged on the boundary of a target object through a human-computer interaction device, a straight line or a curved line is arranged between nodes, and the lines are enclosed to form a boundary outline of the target object; any target point on the node or on the nodal interval line is pressed through the human-computer interaction device, and different operations are respectively executed by judging whether the target point after being pressed is dragged within a given time, and the operations comprise: directly changing the straight or curved shape of the line, changing the nodal position and adjusting the shape of the line which is connected with the nodes, inserting new node, and deleting existed node. With the method and the system, target object can be simply, conveniently, correctly and directly scratched from the digital picture image on a plurality of electronic devices.

A method for operating a sensor element having two contact terminal pairs, comprises steps of providing a first measurement value by applying a first controlled variable having a first polarity between the first terminal pair, and coupling the second terminal pair with output terminals; providing a second measurement value by applying a second controlled variable, having an opposed polarity, between the first terminal pair, and coupling the second terminal pair to the output terminals; providing a third measurement value by applying the first variable between the second terminal pair, and coupling the first terminal pair with the output terminals, providing a fourth measurement value by applying the second variable between the second terminal pair, and coupling the first terminal pair with the output terminals; and determining a sensor signal on the basis of a difference between the first and second values and a difference between the third and fourth values.

The invention provides a shift method of a hybrid electric vehicle. The method comprises the steps of firstly, determining that a battery is in a dischargeable state or a rechargeable state according to SOC (state of charge) of the battery, torque required by a driver and the state of the vehicle; secondly, determining a possible gear at a certain speed under the two conditions and the torque and rotational speed of an engine corresponding to each gear; and finally, determining a target gear under the condition of a minimum fuel consumption rate of the engine and determining whether to perform shift operation according to the time interval between two times of shift. The method has the advantages that in determining the state of the battery, the problem that the state of the battery is repetitively changed due to jump of the SOC is avoided by adopting the comprehensive judgment of values of the SOC (state of charge) of the battery, the torque required by the driver and the state of the vehicle; in determining the target gear, the target gear is determined from all possible gears under the condition of the minimum fuel consumption rate of the engine, and the fuel consumption at the target gear is guaranteed to be minimum; and whether to perform shift operation is determined according to the time interval between two times of shift, and thus frequent shift is avoided.

The invention discloses an active distribution network optimization scheduling system and method based on mixed integer linear programming. Firstly, a linearization equation of the branch power flow of the distribution network is given, and main components in the active distribution network are modeled and linearized; then, an active distribution network day-ahead economic dispatching model considering active power and reactive power coordinated scheduling is constructed. At the same time, in order to overcome the impact of the strong randomness of a distributed power supply on the day-ahead scheduling, a short-term scheduling model with the goal of maximizing photovoltaic and wind power consumption is constructed; a short-term optimal scheduling result is obtained with the day-ahead scheduling as a reference; and finally, the present invention verifies the effectiveness and speedability of the proposed invention through an improved IEEE 33-node distribution network example.

Disclosed is a cell processing method. The method comprises: in the process that a cell performs an on/off operation, a user equipment (UE) of the cell maintaining unchanged association with the cell without migrating to other cells. Also disclosed is a cell processing device. The device comprises: a residence processing module, configured to control, in the process that a cell performs an on/off operation, a UE of the cell to maintain unchanged association with the cell without migrating to other cells.

The invention discloses a method, a device and network equipment for realizing bidirectional forwarding detection. The method comprises the steps of: dividing a plurality of sessions to be subjected to bidirectional forwarding detection into session groups with a set number, and polling each session sub-group according to a set polling period; specific to each session in the currently polled session sub-group, performing the following steps of: sending a keep-alive message to opposite-end equipment of each session and judging whether the keep-alive message sent by the opposite-end equipment is received or not in a set detection period; if the judgment is negative, determining that the corresponding session is in connectivity fault; or else, determining that the corresponding session is free of connectivity fault. According to the method disclosed by the invention, all the sessions do not need to be polled at the same time, so that the occupancy amount of a CPU (Central Processing Unit) is reduced and the system forwarding performance is increased.

The invention provides a photovoltaic high-voltage and direct-current series grid-connected system comprising a dynamic voltage compensator. The photovoltaic high-voltage and direct-current series grid-connected system comprises a plurality of photovoltaic direct-current grid-connected inverters and at least one dynamic voltage compensator, wherein input ends of the plurality of photovoltaic direct-current grid-connected inverters are independent and output ends are connected in series; the input ends of the plurality of photovoltaic direct-current grid-connected inverters are connected with a photovoltaic module respectively; and the output ends of the plurality of photovoltaic direct-current grid-connected inverters are connected in series and are connected with the input end of the dynamic voltage compensator in series. Through coordination and cooperation of the dynamic voltage compensator and the photovoltaic direct-current grid-connected inverters, the probability that the photovoltaic direct-current grid-connected inverters enter a power limiting mode; the generating capacity of the photovoltaic system is improved; and output voltage exceeding of the photovoltaic direct-current grid-connected inverters caused by power fluctuation of the photovoltaic module is overcome.

A network switching method, device, and terminal. The method comprises: when the terminal accesses a first network, detecting whether a second network exists around the terminal, to obtain a first detection result (11); when the first detection result indicates that there is the second network, register with the second network (12); when the registration with the second network succeeds, detecting whether the terminal meets a switch condition under which the terminal is switched from the first network to the second network, to obtain a second detection result (13); and when the second detection result indicates that the terminal meets the switch condition, switching the mobile terminal from the first network to the second network (14).

The invention discloses a radio-frequency emission front-end circuit with automatic gain control, which comprises a radio-frequency variable gain power amplifier, a radio-frequency variable gain modulator and a radio-frequency amplitude detection automatic control circuit, wherein the radio-frequency variable gain power amplifier is composed of a first-level variable gain amplifier and a fixed gain power amplifier which are in cascade connection; the radio-frequency amplitude detection automatic control circuit comprises a radio-frequency amplitude detection circuit and a feedback control digital circuit; and the radio-frequency amplitude detection automatic control circuit is used for detecting the amplitude magnitude of a first-level output signal in a radio-frequency variable gain power amplifier circuit and controlling the magnitude of the gain of a radio-frequency variable gain modulator circuit and a radio-frequency variable gain power amplifier circuit according to amplitude magnitude feedback. The radio-frequency emission front-end circuit provided by the invention has the advantages of being flexibly applied to an amplitude keying emission circuit, especially being suitable for the occasion with relative sensitivity to emission signal power and demand on emission power being free from changing along with the change of temperature and technique.

Provided is a method of controlling a bidirectional converter to charge and discharge a storage battery. The bidirectional converter adopts a double-loop control method, the inner loop is alternating current loop control, and the outer loop is direct current loop control. The direct current loop control can select direct current voltage outer loop control or direct current outer loop control according to different charging and discharging states of the storage battery; when the storage battery is in a constant current voltage-limiting charging state and a constant current discharging state, the direct current outer loop control and alternating current loop control of the bidirectional converter work simultaneously; when the storage battery is in a constant voltage current-limiting charging state and a floating charging constant-voltage charging state, the direct current voltage outer loop control and alternating current inner loop control of the bidirectional converter work simultaneously; the direct current voltage outer loop control and the direct current outer loop control are switched over smoothly; meanwhile, the bidirectional converter adopts a four-section type intelligent charging control and constant-current discharging control strategy for the storage battery.

The invention relates to a power optimal control method for a variable-speed and variable-pitch wind turbine. The variable-speed and variable-pitch wind turbine is controlled within the whole designed wind speed range. When the wind turbine operates between the cut-in wind speed and rated wind speed, a variable-speed control mode is adopted, and at the time, by adjusting the electromagnetic torque of a generator, the wind turbine is made to operate under the optimal efficiency CP max. When the wind turbine operates above the rated wind speed, a variable-pitch controller begins to be used, and by adjusting the pitch angle, the maximum power output is limited at a rated value. At the time, a torque controller is a variable-gain controller, and different gains are set according to the rotation speed values corresponding to different wind conditions. The phenomenon that the wind turbine generates high power output within a short time when affected by gust and the like is greatly relieved. In addition, a switch rule is set for the variable-pitch controller near the rated wind, so that frequent switching of the variable-pitch controller near the rated wind is avoided. By means of the power optimal control method for the variable-speed and variable-pitch wind turbine, the service life of a gearbox is prolonged, and it is guaranteed that the wind turbine operates in a bad environment.

The embodiment of the invention discloses a measurement information reporting method and device, and belongs to the field of the communication. The method comprises the following steps: acquiring the first measurement information of a service cell and the second measurement information of each neighbor cell, wherein each of the first measurement informant and the second measurement information comprises cell signal intensity; determining candidate neighbor cells according to the first measurement information, the second measurement information of each neighbor cell and a network configuration parameter, wherein the network configuration parameter is used for indicating the cell bias of each of the service cell and the neighbor cell; determining a target neighbor cell contained in the candidate neighbor cells according to the first measurement information and the second measurement information of each candidate neighbor cell; and reporting the second measurement information of the target neighbor cell to access network equipment. Through the method disclosed by the embodiment of the invention, the terminal reports the measurement information of the target neighbor cell with good cell signal intensity to the access network equipment to ensure that the access network equipment switches the terminal to the neighbor with better signal intensity according to the measurement information reported by the terminal, thereby improving the communication quality of the terminal.

A game device, which monitors with a virtual camera a picture of a game being proceeded in a virtual space by a first object controlled by a player and a second object controlled by a computer or an opponent and displays a picture on the screen of a monitor, includes a camera position switch ordering unit for issuing switching orders to switch the position of the virtual camera to a first position which shows the front of the first object and to a second position which shows the front of the first object from the rear of the first object, and a symbol displaying unit for displaying a symbol representing the second object on the monitor screen in correspondence with the switching order to switch the position of the virtual camera to the first position upon the second object existing behind the first object.

An operation detection unit of a vehicular operating device is configured to detect a pressing force in a pressing direction substantially perpendicular to a plane including an operation direction of a slide operation by the finger of an operator on an operating surface. A control device does not execute recognition of a gesture pattern based on the slide operation if the pressing force detected by the operation detection unit is smaller than a first threshold value A, and recognizes a gesture pattern based on the slide operation after the pressing force has reached the first threshold value A or more. The control device controls a vehicle equipment in accordance with the recognized gesture pattern.

The invention discloses a decoupling control method for variable pitch control and torque control of a large wind turbine unit. The large wind turbine unit consists of a variable pitch control system and a torque control system. During the operation of a fan, a pitch PID (Proportion Integration Differentiation) controller and a torque controller operate simultaneously, wherein variable pitch control is implemented by the pitch PID controller, and torque control is implemented by the torque controller. The variable pitch control system is formed by a pitch deviation calculating module, a pitch PID controller module, a pitch amplitude limiting module and the like by means of combination, and the torque control system is formed by a torque deviation calculating module, a torque PID controller module, a torque amplitude limiting module and the like by means of combination. The decoupling control algorithm provided by the invention realizes decoupling algorithms of the pitch controller and the torque controller by amending controller software without adding extra hardware, so that the cost of the fan is reduced.

The invention discloses a cell handover method and a base station thereof. The method comprises the following steps that a source base station obtains a measurement report, which is reported by user equipment UE within a preset time bucket, wherein the measurement report comprises a receiving signal quality value of each measurement cell; the source base station determines a change value of the receiving signal quality value of each measurement cell within the set time bucket according to the measurement report; the source base station determines the measurement cell with the maximum change value of the receiving signal quality value as a target cell of the UE; and when the source base station determines that the target cell meets handover decision conditions, the source base station executes cell handover for the UE. The cell handover method and the base station thereof are used for solving a problem of frequent handover of the UE in an overlapping region in the prior art.