30results about How to "Solve the problem of out-of-sync" patented technology

The invention discloses a message transmission method and a network node device. When the link transmission quality continues deterioration, the device informs an compression terminal to directly transmit uncompressed complete message, and when the compression terminal detects the link transmission quality is recovered, the device informs the compression terminal to recover transmission of compressed message, so as to properly reduce the frequency of the decompression terminal reversely transmitting CONTEXT_STATE message to the compression terminal when the link transmission quality continues deterioration, reduce the frequency of the reversely transmitted CONTEXT_STATE message occupying network bandwidth resource, and, to some extent, solve the lost synchronization problem of the context session content when the link transmission quality continues deterioration.

The invention discloses a cradle head control method and device. The cradle head control device comprises a motor used for controlling a cradle head to rotate, an absolute encoder and a main processor, wherein the absolute encoder is used for obtaining initial position information of the cradle head and acquiring real-time position information of the cradle head after the motor executes a control action, and the control action comprises controlling the motor to rotate or stay at a standby state; and the main processor is used for reading the initial position information and the real-time position information, and determining whether to control the motor to execute a predetermined action corresponding to the control action or not according to the initial position information and the real-time position information. The cradle head control method and device disclosed by the invention solve a technical problem of step out of the motor.

The invention relates to a non-contact solenoid drive device of a linear conducting liquid. One end part of a cylinder is connected with a connecting pipe of a liquid pipeline by a sucking valve or is directly connected with the connecting pipe of the liquid pipeline, and the other end part of the cylinder is connected with the connecting pipe of the liquid pipeline by a discharge valve or is directly connected with the connecting pipe of the liquid pipeline; multi-phase solenoid drive coils are periodically arranged outside the cylinder from the end of the sucking valve to the end of the discharge valve according a certain phase sequence A, B, C, D...; a multi-phase alternating current power supply has the phase number equal to that of the multi-phase solenoid drive coils and periodically supplies power for the phase winding of the multi-phase solenoid drive coils according to the sequence of first A phase, then B phase, and then C phase...; and the multi-phase alternating current power supply supplies power for the annular multi-phase solenoid drive coils, the annular multi-phase solenoid drive coils generate a three-dimensional magnetic field linearly moving from the end of the sucking valve to the end of the discharge valve in the cylinder, and the relative movement of the magnetic field and the conducting liquid generates induction current and electromagnetic force in the conducting liquid to realize the non-contact drive of the conducting liquid along a certain specific direction.

A light emitting diode driving system with precise timing switched dimming control used for driving light emitting diode elements is provided, which comprises a power detection unit, a timer control logic, a light emitting diode dimming driver, and a power supply unit being able to overcome different conditions of power source, switch leakage, and system elements to design the timer dimming with steady and precise working status, and solve problems of each of the independent systems which are not synchronized due to imprecisely timed under power-off condition, while providing various dimming mode for users, and a dimming method using aforementioned LED driving system.

The invention relates to a numerical-control band saw machine for sawing American cork wood, and the numerical-control band saw machine comprises a saw machine, a saw frame, a vehicle body, a linear guideway pair, a ball screw, a variable frequency motor, a servo motor, an air pump, a numerical control operating desk, an electric control cabinet and the like; the sawing part of the saw machine comprises a band saw driving wheel, a band saw driven wheel, a tensioning mechanism, a tray, a housing and the like; the tension of a cutter is adjusted by virtue of an adjusting handwheel, the exposed teeth of the cutter are adjusted by a saw blade exposed tooth adjusting handwheel; the wood is clamped by a pneumatic device, the clamping force is adjusted by a regulation valve, the clamping force is realized by an operation handle, 01 gear is a wood clamping gear, N is a neutral gear, and 02 gear is a wood loosening gear; the linear guideway pair and the variable frequency motor are adopted for a walking part, the sawing precision is stable and reliable, the servo motor is adopted for a sawing part, the ball screw is lifted, an imported special cutter is adopted, and the numerical-control band saw machine is steady in operation, small in sawing kerf and high in yield.

The invention provides a compressor lower limit frequency control method and device and an air conditioner, wherein the compressor lower limit frequency control method comprises the following steps ofdetecting an operation parameter of the air conditioner, and adjusting the lowest operation frequency of the compressor according to the operation parameter, wherein the operation parameter comprisesthe phase current of the compressor. The compressor lower limit frequency control method comprises the following steps of judging the heavy load working condition of the compressor by detecting the operation parameters of the air conditioner, correspondingly adjusting the lowest operation frequency of the compressor when the compressor is in the heavy load working condition, preventing the operation frequency of the compressor from dropping to an over low value, further preventing the compressor from being out of step and avoiding influencing user experience.

The invention relates to an in-band secret key negotiation transmission method and system, and belongs to the technical field of mobile communications. A secret key negotiation message generates a transmission packet in a local end and an opposite end, the transmission packet is sent and received, and transmission packet sending, transmission packet receiving and an ending state are controlled. The problems that a present in-band secret key negotiation transmission method is low in efficiency and out of synchronism in secret key negotiation is solved, the two ends of secret key negotiation canmake secret key negotiation effectively and reliably, the synchronism of secret key negotiation is ensured, and the transmission method and system can be used more conveniently due to being dependentfrom a network access manner.

A one-time password certification system token resynchronization method based on an event aims to solve the problems of step out of the token due to inconsistency of counter values of a hardware token and an authentication server of the one-time password certification system based on the event and provides a resynchronization method. The method is divided into window inner resynchronization and window outer resynchronization on basis of a preset size of the window and the counter values as synchronization factors. When step out times of the hardware token and the server are within the size of the window, the window inner resynchronization is carried out, repetitive computation command times are smaller than or equal to the window size, and a group of consistent customer commands and service commands, and the resynchronization is achieved; if not, the widow outer resynchronization is carried out, at the moment if three customer commands and service commands are consistent continuously, the resynchronization is achieved, the whole execution process of the resynchronization method is divided into seven steps. The one-time password certification system token resynchronization method based on the event is highly-efficient, simple in computation, low in time consumption of operation, fast in operation speed, small in occupation space of system memory space, and capable of resisting brute force impact of the certification system.

The invention relates to an electronic commutation control system of a variable-capacitance electrostatic motor. The electronic commutation control system comprises a rotation speed / rotation angle detecting unit, a micro controller and an output amplifying unit. The invention also provides an electronic commutation control method of a variable-capacitance electrostatic motor. The method includes the following steps that: S1, driving voltage is applied, and a rotor starts rotating at a ti time point, and the rotation speed / rotation angle detecting unit is utilized to only provide one path of rotation speed signals of the rotor; S2, the micro controller is utilized to capture the rising edge of the rotation speed signals of the rotor, and a time point at this moment is recorded as ti+1, and a rotation speed signal cycle Ti can be expressed by the equation that Ti=t(i+1)-ti, wherein i is an integer, and a rotation speed coefficient ks is set to belongs to (0, 1], and ks*Ti / 3 is set to be pulse width required by driving voltage at a next cycle; S3, the output amplifying unit is utilized to output three-phase driving voltage signals; and S4, S2 and S3 are repeated, and therefore, high-speed synchronous rotation of the rotor can be realized.

The invention discloses a phase change control device of a variable-capacitance linear electrostatic motor. The phase change control device comprises a driving power supply, a current detection circuit, an integrator and a single-chip microcomputer, wherein the driving power supply is connected with the electrostatic motor and is used for outputting a three-phase driving signal so as to drive a rotor to slide; the current detection circuit is used for detecting the current data flowing through the electrostatic motor and transmitting the current data to the integrator; the integrator is used for integrating the current data to obtain electric quantity and transmitting the electric quantity to the single-chip microcomputer; and when the single-chip microcomputer judges that the absolute value of the electric quantity reaches the maximum, the motor is controlled to change phase. The invention further discloses a phase change control method of the variable-capacitance linear electrostaticmotor. The phase change control method comprises the following steps that firstly, the current data flowing through the electrostatic motor is acquired, and the electric quantity is obtained; and then the electrostatic motor is controlled to change phase at the moment when the maximum of the absolute value of the electric quantity is reached. According to the technical scheme, the phase change electrifying time of the variable-capacitance linear electrostatic motor can be shortened, the phase change frequency and the movement speed are increased, and the electrostatic motor can keep running stably for a long time.

The invention discloses a q-axis excitation control device of a double-axis excitation phase modifier. The q-axis excitation control device comprises a K60 hardware platform, an alternating current sampling module, a rotating speed and torque sensing module, a switching value input and output module, a thyristor driving module, a communication module, a man-machine interface module and a power supply module. The phase modifier can flexibly operate under the working conditions of single-axis excitation, double-axis excitation and positive and negative alternating excitation, the limitation thatthe minimum exciting current is zero is broken through, the phase modifier obtains the short-time phase advance capacity equivalent to the delayed phase overload capacity through reverse excitation,the overvoltage suppression effect of unit installation is greatly improved, the problems of out-of-step and violent power fluctuation of the double-shaft excitation phase modifier under the reverse excitation working condition are solved.

The invention discloses a digital out-of-step prevention stepping motor rotating speed controller and a control method, and the controller comprises a high-frequency oscillator, a frequency divider, areversible counter, a digital comparator, a drive plate switch, a control door, and a low-frequency oscillator. The high-frequency oscillator is connected with the frequency divider; the output end of the reversible counter is connected with the preset end of the frequency divider; the output end of the reversible counter is further connected with one set of input ends of the comparator, the other set of input ends of the comparator is connected with the drive plate switch, the output end of the comparator is connected with a control gate, the output end of the control gate is connected withthe reversible counter, and the input end of the control gate is connected with the low-frequency oscillator. The controller overcomes the problems that in the prior art, a stepping motor is out of step in the process of frequent starting and stopping and sudden change of frequency, so that normal operation cannot be achieved, and even the locked-rotor phenomenon occurs.

An out-of-step control method for the air door of a curing barn comprises the steps that whether an air door meets reset conditions or not is judged; if the air door meets the reset condition, whether the air door working current is normal working current or not is judged; if the working current of the air door is the normal working current, the air door is controlled to reset. Whether the air door is reset or not is determined by judging whether the air door meets the reset condition that the air door is opened and closed for more than 200 times or the accumulated operation time exceeds 3 h, and after the air door meets the reset condition, the air door is reset once, so that the problem of out-of-step of the air door after multiple times of opening and closing or continuous long-time operation is solved; the out-of-step phenomenon of the air door after the air door is opened and closed for more than 200 times or the accumulative operation time exceeds 3 hours is obtained through multiple experimental studies, the air door is reset according to the reset condition of the air door, the influence of out-of-step of the air door on the temperature and humidity of the curing barn can be effectively and timely eliminated, and the judgment method is simple and reliable.

The invention relates to a PDCP layer superframe number synchronization method. The method comprises steps of according to transmitted data packet quantity and step out time during peak rate, determining an estimation dynamic value of a receiving end HFN value; according to a recorded HFN value and an estimation dynamic value of the synchronization of the last time of the PDCP layer, generating target quantity of ICMP reports, wherein a sequence number of each ICMP repot is the maximum value; according to the sequence from larger to small of the HFN values of the ICMP reports, sending the target quantity of ICMP reports to a target terminal; receiving responding reports fed back by the target terminal; and according to the recorded HFN value, the estimation dynamic value, the responding reports and the corresponding ICMP reports, determining a target HFN value of the target terminal at the current moment and storing the target HFN value to be a synchronization HFN value. The inventionalso provides a base station. When the HFN of the base station is smaller than the HFN of the target terminal, by sending ICMP reports to the target terminal, based on the responding reports, the current target HFN value of the target terminal is determined, and is stored to be the synchronization HFN value, so the HFN synchronization of the target terminal is restored and synchronization efficiency is greatly improved.

The invention provides a compressor lower limit frequency control method and device and an air conditioner, wherein the compressor lower limit frequency control method comprises the following steps ofdetecting an operation parameter of the air conditioner, and adjusting the lowest operation frequency of the compressor according to the operation parameter, wherein the operation parameter comprisesthe phase current of the compressor. The compressor lower limit frequency control method comprises the following steps of judging the heavy load working condition of the compressor by detecting the operation parameters of the air conditioner, correspondingly adjusting the lowest operation frequency of the compressor when the compressor is in the heavy load working condition, preventing the operation frequency of the compressor from dropping to an over low value, further preventing the compressor from being out of step and avoiding influencing user experience.

The invention discloses a message transmission method and a network node device. When the link transmission quality continues deterioration, the device informs an compression terminal to directly transmit uncompressed complete message, and when the compression terminal detects the link transmission quality is recovered, the device informs the compression terminal to recover transmission of compressed message, so as to properly reduce the frequency of the decompression terminal reversely transmitting CONTEXT_STATE message to the compression terminal when the link transmission quality continuesdeterioration, reduce the frequency of the reversely transmitted CONTEXT_STATE message occupying network bandwidth resource, and, to some extent, solve the lost synchronization problem of the contextsession content when the link transmission quality continues deterioration.

The invention discloses a phase change control device of a variable-capacitance linear electrostatic motor. The phase change control device comprises a driving power supply, a current detection circuit, an integrator and a single-chip microcomputer, wherein the driving power supply is connected with the electrostatic motor and is used for outputting a three-phase driving signal so as to drive a rotor to slide; the current detection circuit is used for detecting the current data flowing through the electrostatic motor and transmitting the current data to the integrator; the integrator is used for integrating the current data to obtain electric quantity and transmitting the electric quantity to the single-chip microcomputer; and when the single-chip microcomputer judges that the absolute value of the electric quantity reaches the maximum, the motor is controlled to change phase. The invention further discloses a phase change control method of the variable-capacitance linear electrostaticmotor. The phase change control method comprises the following steps that firstly, the current data flowing through the electrostatic motor is acquired, and the electric quantity is obtained; and then the electrostatic motor is controlled to change phase at the moment when the maximum of the absolute value of the electric quantity is reached. According to the technical scheme, the phase change electrifying time of the variable-capacitance linear electrostatic motor can be shortened, the phase change frequency and the movement speed are increased, and the electrostatic motor can keep running stably for a long time.

The invention discloses a full-transparent light-emitting label controller which is externally connected with a power supply and controls a plurality of full-transparent light-emitting labels. The full-transparent light-emitting sign controller comprises a power supply anti-reverse connection circuit, a solar sampling circuit, an MCU and a high-power output circuit. The MCU comprises an AD conversion circuit and a software filtering unit, the software filtering unit prevents the IO port of the MCU from misoperation on the post-stage high-power output circuit, and the AD conversion circuit carries out software filtering and sets different wide threshold delay processing through distinguishing lightening and closing functions. According to the invention, the problem that the full-transparent light-emitting sign in each direction is not synchronously turned on or turned off can be solved; an anti-reverse connection circuit for a high-power power supply can prevent installation and maintenance personnel from misoperation, reverse connection of positive and negative electrodes of the power supply and damage to the circuit.

A method and system for controlling synchronization in the Semi-Persistent Scheduling (SPS) mode are disclosed in the present invention. The method includes that: a network side sets synchronization parameters corresponding to SPS resources; a Radio Network Controller (RNC) allocates the SPS resources and the corresponding synchronization parameters to a base station and a terminal by utilizing an SPS resource pattern list, wherein the SPS resource pattern list includes the SPS resources and the corresponding synchronization parameters; the terminal determines currently-used SPS resources and corresponding synchronization parameters, and synchronously adjusts uplink channels. The present invention can solve the problem that uplink channels are desynchronized due to the fact that the same synchronization parameters are utilized by a User Equipment (UE) while SPS resources are different (especially, the repetition periods are different).

The invention discloses a clock synchronization device suitable for auxiliary retaps, and relates to a scattering communication system adopting an auxiliary retap. Clock synchronization between the auxiliary retap and a modem is realized by adopting a full-software signal processing method, thereby simplifying a time synchronization hardware circuit and realizing higher reliability, more flexibleconfigurability and expandability. The clock synchronization device also adopts a method combining the clock synchronization and the data information buffer adjustment, thereby enhancing the clock jitter resistance of the system and improving the performance of the device.

The invention discloses a digital anti-out-of-step stepping motor speed controller and a control method, wherein the controller includes: a high-frequency oscillator, a frequency divider, a reversible counter, a digital comparator, a dial switch, a control Gate and low-frequency oscillator; the high-frequency oscillator is connected to the frequency divider, the output terminal of the reversible counter is connected to the preset terminal of the frequency divider, and the output terminal of the reversible counter is also connected to the frequency divider One set of input ends of the comparator is connected, another set of input ends of the comparator is connected with the dial switch, the output of the comparator is connected with the control gate, and the output of the control gate is connected with the reversible The counter is connected, and the input of the control gate is connected with the low frequency oscillator. The controller overcomes the problems in the prior art that the stepping motor is out of step in the process of frequent start-stop and sudden change in frequency, resulting in abnormal operation and even locked-rotor phenomenon.

The invention discloses a global task synchronization method for an avionics system. The method is used for solving the problem of uncertainty caused by task out-of-step of a traditional avionics system. Based on the thought of unified scheduling of global tasks, a network clock is used as a clock for task scheduling of each processing node; interrupts are generated on each processing node in a timing manner by the network clock; and each processing node schedules the task of the node according to network timing interruption. And after system initialization is completed, task synchronous starting of each processing node is completed through a network event. According to the method, the problem of task out-of-step caused by asynchronous task scheduling clocks of all the processing nodes or difference of initialization time of all the nodes can be effectively solved, and the task scheduling certainty of the avionics system is improved.

The invention relates to an in-band secret key negotiation transmission method and system, and belongs to the technical field of mobile communications. A secret key negotiation message generates a transmission packet in a local end and an opposite end, the transmission packet is sent and received, and transmission packet sending, transmission packet receiving and an ending state are controlled. The problems that a present in-band secret key negotiation transmission method is low in efficiency and out of synchronism in secret key negotiation is solved, the two ends of secret key negotiation canmake secret key negotiation effectively and reliably, the synchronism of secret key negotiation is ensured, and the transmission method and system can be used more conveniently due to being dependentfrom a network access manner.

The invention relates to an electronic commutation control system of a variable-capacitance electrostatic motor. The electronic commutation control system comprises a rotation speed / rotation angle detecting unit, a micro controller and an output amplifying unit. The invention also provides an electronic commutation control method of a variable-capacitance electrostatic motor. The method includes the following steps that: S1, driving voltage is applied, and a rotor starts rotating at a ti time point, and the rotation speed / rotation angle detecting unit is utilized to only provide one path of rotation speed signals of the rotor; S2, the micro controller is utilized to capture the rising edge of the rotation speed signals of the rotor, and a time point at this moment is recorded as ti+1, and a rotation speed signal cycle Ti can be expressed by the equation that Ti=t(i+1)-ti, wherein i is an integer, and a rotation speed coefficient ks is set to belongs to (0, 1], and ks*Ti / 3 is set to be pulse width required by driving voltage at a next cycle; S3, the output amplifying unit is utilized to output three-phase driving voltage signals; and S4, S2 and S3 are repeated, and therefore, high-speed synchronous rotation of the rotor can be realized.

The invention relates to a bandwidth request method of a bandwidth multimedia satellite system. A bandwidth request model adopted by the invention consists of three entities including a service source, a user terminal and a satellite. The bandwidth request of the bandwidth multimedia satellite system is realized by establishing a bandwidth request system model and designing a bandwidth request sending manner, a bandwidth requirement estimation algorithm and a synchronization mechanism. According to the bandwidth request method of the bandwidth multimedia satellite system, the limitation of single bandwidth request sending manner is overcome, the problem of low utilization efficiency of a bandwidth caused by an improper updating opportunity of an estimation value of 'slot time default' is solved, and the problem of step out between a bandwidth request agent and a bandwidth management unit caused by loss of the bandwidth request is solved. Not only can the utilization efficiency of a satellite system be obviously improved, but also the instantaneity of service transmission under a heavy-load service condition can be improved.

The invention relates to automatic control systems, in particular to a closed-loop digital control system of an industrial sewing machine. The closed-loop digital control system of the industrial sewing machine comprises an industrial sewing machine body which comprises a first swing mechanism, a second swing mechanism and a needle rod driving mechanism. The closed-loop digital control system of the industrial sewing machine is characterized in that a first driving device, a second driving device, the needle rod driving mechanism, a detecting unit and a control unit are further included, and the first driving device, the second driving device and a third driving device are all connected with the control unit through the detecting unit. Compared with the prior art, the closed-loop digital control system of the industrial sewing machine has the advantages that a closed loop is used for controlling the first swing mechanism, the second swing mechanism and the needle rod driving mechanism according to real-time working states, the step-out problem in industrial sewing is solved, the reject ratio of sewing products is lowered, and the reliability and the stability of the digital control system of the industrial sewing machine are greatly improved.

The invention provides a motor driving method and system, comprising: obtaining the motion parameters of the motor and the drive signal of the motor, the motion parameters including the motion speed, the number of motion steps and the motion direction; determining the target of the sine meter drive unit based on the motion speed of the motor Subdivision gear, or determine the target subdivision gear of the sine meter drive unit based on the speed of motion of the drive signal and the motor; determine the number of moving steps of the table item in the sine meter drive unit based on the target subdivision gear and the number of motion steps, and Determine the moving direction and moving speed of the table item in the sine table drive unit based on the motion direction and speed; get the rotation angle of the motor based on the movement steps of the table item in the sine table drive unit and based on the moving direction of the table item in the sine table drive unit A target rotation direction of the motor is determined, so as to control the motor to rotate toward the target rotation direction at a rotation angle. The invention solves the problem that the motor is out of step due to insufficient torque in a high-speed or low-temperature environment.