42results about How to "No data loss" patented technology

The present invention provides a memory device for reducing power consumption during a self-refresh operation performed for protecting data loss. For this object, in the present intention, the memory device for performing a refresh operation in a self-refresh period instigated for every constant time interval after entering into a self-refresh mode includes a low-power controller outputting a enable signal for enabling the power supply means during the self-refresh period after being enabled in the self-refresh mode; and a power supply means receiving the enable signal for supplying a low and a high voltages used in an internal circuit by using an external supply voltage and a ground voltage, wherein the low voltage is lower than the ground voltage and the high voltage is higher than the external supply voltage.

The invention provides a streaming media live broadcast method and system. The streaming media live streaming method includes: the streaming end slices the real-time recorded streaming media, sequentially generates slice files that can be played independently; updates the generated slice file information to an index file, and the index file has preset slices File information capacity; the streaming end uploads the index file and the slice file to the server. The server can further process as needed. The streaming media live broadcast system includes: the slice processing module is used to slice the streaming media recorded in real time, and sequentially generates slice files that can be played independently; the slice upload module is used to update the generated slice file information to an index file, the The index file has a preset slice file information capacity, and the index file and the slice file are uploaded to the server. The technical solution of the invention improves the anti-fluctuation performance of live streaming media and ensures data integrity.

The driving method for code flow broadcast card and code flow acquisition card includes transmitting code flow data between hardware and application program in DMA mode; judging the interruption type with the ISR of the drive program and processing various interruption types through calling DPC routine in the interruption delay process; and realizing the control of the application program on the hardware through the communication between the application program and the drive program. The present invention solves the problem in interfacing the code flow broadcast card and the code flow acquisition card with the application program to make the code flow broadcast card and the code flow acquisition card operate normally on computer PCI bus to complete code flow broadcast card and acquisition task and further analysis and monitoring. The drive program completes the code flow transmission correctly at code flow rate as high as 120 Mbps without data loss.

The invention discloses a buried long distance pipeline cathode protection device based on an STM32 single-chip microcomputer. The device is characterized in that an anode ground bed and a reference electrode are laid in the soil beside a buried long distance pipeline, and a cathode wiring point is arranged on the buried long distance pipeline; the device comprises an upper computer, a main control module, an AD data acquisition module, a DA control module, a communication module, a storage module, an RTC module, a human-computer interaction module, a power module and a temperature sensor. Compared with the prior art, the main control module acquires output voltage, output current and reference potential through the AD data acquisition module, the temperature of the pipeline is collected by the temperature sensor, the output voltage of the power module is automatically adjusted through the DA control module, and the corrosion rate of the buried pipeline is greatly reduced.

The invention belongs to the field of security and protection technology and relates to a trouble intelligent detecting method for a video surveillance device and a detecting system thereof. The trouble intelligent detecting method for the video surveillance device and the detecting system thereof solve the technical problems that the design is not reasonable and the like in the prior art. Each trouble inspection device in each area is connected with a plurality of video surveillance devices. An area memorizer and an area alarm device are respectively connected with each trouble inspection device in each area. The area memorizers are both connected with a concentration memorizer. The area alarm devices are both connected with a supervision device. The concentration memorizer and a concentration alarm device are both connected with the supervision device. A plurality of spare trouble inspection devices are connected on the supervision device. The area trouble inspection devices and the spare trouble inspection devices are same in quantity and coordinated in one-to-one correspondence to work. The trouble intelligent detecting method for the video surveillance device and the detecting system thereof have the advantages of that the whole framework is reasonable and the structure is simple, the work stability is good and the overall breakdown conditions are not easy to appear, alarm methods are various so as to eliminate risks of ignoring alarm signals, and alarm signals can be timely sent out.

The invention discloses a cluster robot mapping system and method. The sweeping robot uses laser radar to construct a grid map, and sends a local sub-map to the control center in real time in a local area network communication module built on the basis of a router. Finally, when the initial relative position of the robot is known, Based on the pose, the map coordinate system is transformed and fused into a complete map. The real-time mapping method of cluster sweeping robots based on the local area network of the present invention can solve the problem of long mapping time in a large-area indoor environment, and can not only improve the mapping quality, but also observe the mapping effect in real time.