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.

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 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 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.

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.

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 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.