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2042results about How to "Improve synchronicity" patented technology

A LED display screen display calibration system and calibration method

The invention relates to a display calibration system of a LED display screen and a calibration method thereof. The system comprises a video capture controller, a data distributor, scanning control cards and LED display modules; the memory chips of the display modules save simple-point calibration data of the display modules, which is uniformly arrayed in a LED display box in the light of a row or column cascade; a plurality of LED display boxes are uniformly arrayed in the light of the row or column cascade to constitute the LED display screen; the head end scanning control cards of each row cascade or each column cascade of the LED display screen are respectively connected with a GigE communication interface circuit of the data distributor, and the data distributor is connected with the GigE communication interface circuit of the video capture controller via the GigE communication interface circuit thereof; based on the systems, the method takes the LED display modules for saving the simple-point calibration data as units, thus realizing the calibration of display screen pixel. The invention reduces the bandwidth requirements on the connection among the scanning control cards, realizes the function of plug and play of the display modules, is convenient for batch production and simple in maintenance operation, and improves the synchronicity of calibration of the display screen.
Owner:SHENZHEN AOTO ELECTRONICS

Precise self-centering chuck suitable for super-large workpieces

ActiveCN105772771AGood synchronizationSame output torqueChucksNumerical controlEngineering
The invention relates to a precise self-centering chuck suitable for super-large workpieces. The precise self-centering chuck suitable for the super-large workpieces comprises a chuck body and a plurality of jack catch mechanisms arranged on the chuck body in a sliding mode. A jack catch driving mechanism is further arranged on the chuck body and comprises a numerical control moment motor, a plurality of transition gears, a plurality of double-enveloping speed reducers and a first gear. The inner circular surface and the outer circular surface of the first gear are provided with inner teeth and outer teeth correspondingly. The numerical control moment motor is provided with motor teeth. The multiple transition gears are all engaged with the motor teeth and the inner teeth of the first gear. The outer teeth of the first gear are engaged with second gears of the multiple double-enveloping speed reducers. The double-enveloping speed reducers drive the jack catch mechanisms to reciprocate to clamp or release the annular workpieces to be machined. The numerical control moment motor is used for sequentially driving the multiple transition gears and the double-enveloping speed reducers to rotate in a matched mode, so that the multiple jack catch mechanisms move inwards or outwards synchronously. The super-large annular workpieces are subjected to automatic centering clamping or releasing, and the clamping positioning accuracy is high.
Owner:ZHEJIANG 81 PRECISION MACHINERY CO LTD

Full automatic bearing assembly machine

The invention relates to a full automatic bearing assembly machine, a conveying device of an inner ring and an outer ring, a detecting device of the inner ring and the outer ring, a storing device of the inner ring and the outer ring, a closing device of the inner ring and the outer ring, an assembly device and a control device are sequentially arranged on the upper surface of a frame according to the processing sequence, a first shift sliding block is arranged on a linear guide track in the frame, a shift cylinder is fixed on the first shift sliding block, a telescopic rod is fixedly connected with the frame, curved mounting plates are respectively connected at the front and the back of a guide pole of a two-way cylinder which is fixed above the shift cylinder, the two curved mounting plates are respectively fixedly connected with an outer ring retainer plate and an inner ring retainer plate on the upper surface of the frame, a product shift cylinder is arranged in the position which corresponds to the assembly device in the frame, the product shift cylinder is fixed on a support above the second shift sliding block, the telescopic rod is fixedly connected with a product retainer plate on the upper surface of the frame, and the second shift sliding block is mounted on the linear guide track on the frame and connected with the shift cylinder via a connecting rod. The full automatic bearing assembly machine has reasonable structure, small volume, good running synchronization and high efficiency.
Owner:SHANDONG XUNJIE PRECISION EQUIP

Multishaft synchronous servo driving system and synchronous control method thereof

The invention relates to a multishaft synchronous servo driving system and a synchronous control method thereof, and belongs to the technical field of control systems. In the system, any one of servo drivers is selected as a main servo driver for regularly sending a synchronous signal to synchronous communication buses, and the others are used as auxiliary servo drivers; the synchronous communication buses are connected among the servo drivers; and a synchronous interruption processing module is arranged in each servo driver. The method comprises the following steps of: regularly sending the synchronous signal from the synchronous interruption processing module of the main servo driver, generating the highest priority level on the auxiliary servo drivers so as to shield interruption, modifying a control period length set value of current loops of the auxiliary servo drivers by the synchronous interruption processing modules of the auxiliary servo drivers, and zeroing the execution frequency of the current loops in a speed loop. By the system and the method, the error among the control period lengths of the control loops of the servo drivers can be reduced greatly within a synchronous interruption interval, so the synchronism of the system is enhanced greatly, and the processing precision of the system is guaranteed.
Owner:NANJING SHOWMOTION MECHATRONICS TECH

Melon and fruit picking device and picking method thereof

The invention discloses a melon and fruit picking device and a picking method thereof, which relate to the technical field of agricultural equipment. The melon and fruit picking device comprises a clamping device, a cutting device and a control device, wherein the clamping device comprises a step motor, a driven gear, a left support swinging rod, a left finger, a driving gear, a right support swinging rod, a right finger and supporting blocks, the supporting blocks are arranged under the left finger and the right finger, the driving gear and the step motor are connected, the driving gear and the driven gear are connected through a gear pair, the left finger is arranged at the end parts of the left support swinging rod and the driven gear, the right finger is arranged at the end parts of the right support swinging rod and the driving gear, the cutting device comprises a cutter, a swinging air cylinder and an electromagnetic reversing valve, the cutter is arranged on an output shaft of the swinging air cylinder, the electromagnetic reversing valve is arranged on the swinging air cylinder, the swinging air cylinder is arranged on a cutter frame, and the cutter frame is arranged on a back seat vertically and fixedly arranged on a base. The melon and fruit picking device and the method can be used for automatically picking melons and fruits, and a large amount of time and labor canbe saved for laborers.
Owner:CHINA AGRI UNIV

Video source tracing and encryption method based on watermark technology

The invention relates to a video source tracing and encryption method based on a watermark technology. The method comprises the steps of extracting an original video and obtaining device information and user information; transforming the original video from a time domain to a frequency domain through adoption of a discrete cosine transform algorithm, and generating a to-be-embedded watermark through adoption of a watermark generation algorithm; embedding the to-be-embedded watermark through adoption of a watermark embedding algorithm, thereby generating the video containing the watermark; generating a time domain video containing the watermark through adoption of an inverse transform algorithm; carrying out encryption through adoption of a key frame extraction algorithm and a video head information encryption algorithm, thereby forming an encrypted video file; and coding and storing the encrypted video file. According to the method, the generated video containing the watermark is good in quality, high in concealment and security and good in video sensuality; the method is good in encryption effect and high in security; relatively good source tracing and encryption effects are achieved; the video sharing security and circulation traceability are realized.
Owner:ANHUI SUN CREATE ELECTRONICS

High-reliability binaural wireless earphone and communication method applied to binaural wireless earphone

The invention relates to a high-reliability binaural wireless earphone and a communication method applied to the binaural wireless earphone. The binaural wireless earphone comprises a master earphoneand a slave earphone, wherein the master earphone establishes a bluetooth link with another equipment so as to carry out bluetooth communication with the equipment and transmits related parameters ofthe bluetooth link to the slave earphone so as to enable the slave earphone to listen for bluetooth signals from the equipment. One of the earphones is configured to send an error correction code frame to the other earphone at least in the cast of correctly receiving a bluetooth audio data frame, wherein the error correction code frame includes an error correction code under the condition that oneearphone correctly receives the bluetooth audio data frame. According to the wireless earphone and the communication method, the ability of the wireless earphone to receive the bluetooth audio data frame from another equipment can be improved, and the reliability of bluetooth transmission is enhanced; the retransmission of the other equipment for the audio data frame is reduced; and the synchronization of the master earphone and the slave earphone in bluetooth data frame reception can also be improved so as to optimize the stereo effect.
Owner:BESTECHNIC SHANGHAI CO LTD

Output-oriented network transmission technique of multi-screen splicing system

The invention relates to an output-oriented network transmission technique of a multi-screen splicing system. The core of the technique is output-oriented smart segmentation and accurate transmission; in other words, segmentation processing is performed on signals in a smart way according to the requirements of output display, and then each part of data is accurately transmitted to a corresponding display unit. The technique comprises the following main steps that: step 1, an input acquisition end processor (2) acquires a signal from a signal source (1), and performs compression processing on the corresponding signal according to a display policy sent by a control host (5); step 2, the acquisition end processor (2) segments the signal according to the display policy, compresses and packs the segmented image data and then transmits the same to an output display end through a network; step 3, a display end processor (3) unpacks and decodes the data and performs amplification processing on the signal according to the display policy; and step 4, the display end processor outputs and displays the image on a corresponding spliced display screen (4). In the whole process, the data is segmented in advance at the input end and each part of data is accurately transmitted to the corresponding display unit; and the compression of the signal is completed at the input end while amplification is realized by the output end; therefore, the data in the whole network system is transmitted at the lowest flow rate and the waste of bandwidth is avoided.
Owner:江苏清投视讯科技有限公司

Double-motor synchronous control device and method for silicon chip conveying manipulator

The invention relates to a double-motor synchronous control device and a double-motor synchronous control method for a silicon chip conveying manipulator. The method comprises the following steps of: planning and computing a trajectory by using a main computer to obtain expected positions of two motor output shafts; reading actual positions of the two motor output shafts through a coder interface circuit; performing proportion integration differentiation (PID) computation to obtain single-shaft position closed-loop control amount, and outputting the single-shaft position closed-loop control amount to a motor driver; according to the actual positions of the two motor output shafts, computing actual speeds of the two motor output shafts; according to the actual speeds of the two motor output shafts, respectively computing the speed difference and position difference of the two motor output shafts; inputting the speed difference and the position difference into a cross-coupling controller, and processing the speed difference and the position difference to obtain cross-coupling control amount; and adding the cross-coupling control amount to the single-shaft position closed-loop control amount, or subtracting the cross-coupling control amount from the single-shaft position closed-loop control amount, and then outputting a result to the motor driver, so that cross-coupling synchronous control of the two shafts can be realized. By the invention, arm synchronism can be improved in the operation process of the manipulator, the damage to silicon chips is avoided, the asynchronism of the manipulator can be compensated, and the synchronism is improved.
Owner:SHENYANG SIASUN ROBOT & AUTOMATION

Geologic field information collection system, geologic field information collection method and application method of collection system

The invention relates to a geologic field information collection system. The collection system is designed by adopting a platform-based concept and integrates a project management module, a GPS (global positioning system) module, a geologic compass module, an image system module and a character system module, collection is performed by dividing geologic field sources into points, lines and planes, and information of geologic medium sources like geologic points, fault points, hydrologic points, drill holes, fractures, measured formation sections and pits is output in the form of geologic field information collection card module pieces and Excel data files respectively, so that requirements on filing of original data are met, direct utilization of geologic field information is realized, and integration of outdoor work and indoor work is realized. The collection system comprises a system function module, a geologic field information collection card module and a data output module. By the system, the geologic field information can be collected quickly and accurately; efficiency of field work and data accuracy are improved by providing functions of quick GPS positioning, a measuring ruler, an angulometer, a geologic compass and the like.
Owner:长江岩土工程有限公司

Control method and device for locomotive brake average tube

The invention discloses a control method and device for a locomotive brake average tube. The device comprises an air source filtering device, a first solenoid valve, a pressure boost valve, a third solenoid valve, a second solenoid valve, a control unit, a pressure detection device, a control air cylinder and a pneumatic reversing valve, wherein the first solenoid valve, the pressure boost valve and the third solenoid valve are connected with the air source filtering device and arranged on an air circuit installing plate, the second solenoid valve is connected with the air source filtering device and arranged on the air circuit installing plate, the control unit and the pressure detection device are connected with the first solenoid valve and the second solenoid valve, the control air cylinder is connected with the pressure boost valve and the pressure detection device, the pneumatic reversing valve is connected with the pressure boost valve and the third solenoid valve, and an air outlet of the pneumatic reversing valve is connected with an output port of the average tube. The working state of a locomotive local pusher engine can be set automatically, the operation of setting the working state of the locomotive local pusher engine is simplified, the precontrol pressure of the average tube is controlled in a closed-loop mode, the response speed of a brake cylinder of the locomotive pusher engine is increased, and the synchronism of the brake cylinder of the locomotive local pusher engine is improved.
Owner:QINGDAO SRI TECH CO LTD
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