38results about How to "Ensure real-time communication" patented technology

The invention belongs to the field of remote control and artificial intelligence and relates to an intelligent adjuvant therapy robot device for performing real-time social capability training for autism children. The device comprises a head movement driver (1), an arm movement driver (2), a device loader (3), a driving-driven wheel type chassis (4) and a casing module (7). A multi-joint combined driving mode is adopted, the collaborated driving capability of the robot for every movement joint is improved, the problem that time delay affects the interaction effect is solved, precise posture control of the robot in the random direction is achieved, a limb movement path planning function for automatically avoiding obstacles is achieved, and intelligent emotion interaction between a human and the robot and a safe and reliable family remote rehabilitation therapy model are achieved in various modes such as voice, images, touch and induction in the man-machine interactive process in response to emotion cognitive disorder which occurs universally in child patients.

The invention relates to a synchronous phasor calculation method based on DFT recursion of FPGA hardware. An FPGA is configured through a central processing unit (CPU) and controls an analog-digital (AD) converter to complete a sampling process under the 1 pulse per second signal (1PPS) synchronization, and the cycle DFT calculation and the recursion DFT calculation are utilized for eliminating accumulated errors of the recursion DFT calculation; and a complex phasor compensation algorithm is completed by the CPU. The FPGA and the CPU are matched to complete an acquisition calculation compensation process of synchronous phasors, and both the high-speed parallel computing capability of the FPGA and the flexible floating-point operation function of the CPU are used. The recursion DFP operation which is long in consumed time is completed by the FPGA, and the CPU loads are small, so that the communication response instantaneity of the CPU is guaranteed, and further, the communication reliability of a power management unit (PMU) is improved.

The invention relates to the technical field of VR, especially to a wireless VR helmet based on a high-performance host. The wireless VR helmet comprises a helmet body, a wireless audio-video sending end, a wireless audio-video receiving end and a display screen, the wireless audio-video sending end comprises a coding unit and a wireless audio-video sending module, the wireless audio-video receiving end comprises a wireless audio-video receiving module and a decoding unit, and the decoding unit is connected with the display screen via an MIPI or LVDS interface. According to the invention, the VR helmet is no longer connected with the host in a wired manner due to use of a wireless communication technology, a user can walk freely in a larger space without limit of cables when using the wireless VR helmet, and the VR experience is improved; and graphs and computing resources in the host are fully utilized, signals of a signal source is decompressed in a compression-free or real-time compression manner, the communication instantaneity is ensured, and thus, dazzling caused by time delay is reduced.

The invention discloses a communication real-time guaranteeing method of a vehicle-mounted CAN (Controller Area Network). The method comprises the following steps of: judging whether a maximum number S of messages which can be sent in a datum period is larger than the summation of a number S1 of period type messages required to be sent and a number S2 of reserved event type messages or not; if not, optimizing the quantity of the period type messages sent by electronic control units until a condition that the S1 is larger than the summation of the S1 and the S2 is met, and if so, distributing the period type messages to time slots of the datum period according to identifiers (ID) and reserving the event type messages to generate a message scheduling list; finally, selecting an electronic control unit as a time sequence datum node of the CAN, and broadcasting a starting message of the datum period via the datum period; and after all the electronic control units receive the starting message of the datum period, sending the period type messages according to the message scheduling list. The invention guarantees the use of the traditional CAN bus from time sequence and ensures that the messages sent by all the electronic control units can be sent out in real time, thus the communication real-time of the vehicle-mounted CAN is guaranteed. Meanwhile, because the vehicle-mounted CAN is implemented on the basis of the traditional CAN, the vehicle-mounted CAN is compatible with the traditional CAN and has low cost.

The invention discloses a rapid synchronous phasor correction method which involves an initialization module, a synchronous sampling module, a phasor computation module, a phasor correction module, a phasor FIFO buffer area read-write interface module and a CPU compensation module. The rapid synchronous phasor correction method has the advantages that through the capacity of high-speed parallel computing of an FPGA, the data synchronous sampling process, recursive DFT operation and a phasor filter algorithm are finished in the FPGA, so that a CPU is released from frequent sampling interruption and the heavy DFT operation process, the main task is focused on response to commands of a master station, and communication instantaneity of a PMU is guaranteed. Meanwhile, the phasor filter algorithm is optimized through a DA algorithm, more-digit multiplication of long bytes can be carried out synchronously, and the computational speed is greatly improved.

The invention belongs to the technical field of network communication, and discloses a high-speed TTE cascaded network-oriented 1588 synchronization method, system, and device. The port calculates the link delay, the switching node receives the data frame, obtains the receiving time stamp, analyzes and extracts the synchronization frame Sync Frame content, cache timestamp information, calculate time offset, correct local clock, forward synchronization frame Sync to send port, send arbitration, send analysis and cache frame type, MAC send processing, get send timestamp, extract cached send frame type , to modify the Sync frame correction field to complete transparent transmission. The present invention adopts the method of analyzing the data frame type at the data link layer, and then performing MAC transmission processing, so that the time stamp can be quickly corrected when the synchronization frame is about to be transmitted to the high-speed network port; at the same time, the design switching node adopts a transparent clock plus a common The clock working mode improves the versatility and functional diversity of the synchronization scheme.