Abstract: An ultrasonic sensor, which is installed on a test device, includes a shell, one end is open, the other end is closed surface; a cover sheet, bonded to the open end of the shell; a copper foil, a lower surface of the copper foil is bonded to an inner bottom surface of the closed surface of the shell; a piezoelectric chip, a lower surface of the piezoelectric chip is bonded to a upper surface of the copper foil, and when the test device vibrates, the piezoelectric chip converts a vibration signal into a voltage response signal; a cable, a positive electrode is welded on a upper surface of the piezoelectric chip, and a negative electrode is welded on the upper surface of the copper foil, configured to connect to an external detection device and transmit the voltage response signal to the external detection device.

Abstract: A more efficient method of data collecting using multicast instead of individual slave-by-slave requests for data defines a multicast address through a master station. Slave stations are divided into feature groups according to their feature value and a mapping relationship table between the multicast addresses and the feature groups is established. Data request frames from the master station to the slave stations include a destination address which is parsed by all the slave stations, and if the destination address is the same as the multicast address in the mapping relationship table, the slave stations in the feature group associated with the destination address transmit data in response to the master station, the data request being discarded by other slave stations which are not associated.

Abstract: A personnel contact history recording method executable by an electronic device, comprising: scanning surrounding devices via Bluetooth by a preset time interval; requesting a device name and an IMSI of the scanned device, when at least one device is scanned, and generating a surrounding phone list according to the scanned devices; comparing the surrounding phone list with a daily list to determine whether the devices recording in the surrounding phone list are recorded in the daily list; and, if at least one device recording in the surrounding phone list is recorded in the daily list, sending a warning message to the electronic device and a server.

Abstract: A method for ensuring safety of humans within operating area or in close proximity to an automatic apparatus is applied in and by a control apparatus. The control apparatus is coupled to one or more cameras arranged around the operating area of the automatic apparatus. The control apparatus uses deep learning techniques to analyze images captured by the cameras to determine whether there is a person in the operating area and powers off the automatic apparatus if any person is deemed present.

Abstract: In a method of data processing executed in a gateway, a communication protocol matched with a target device is selected from a device driver database of the gateway; a connection with the target device is established according to the matched communication protocol; a sensing data of the target device is acquired; a data cleaning processing is performed on the acquired sensing data; and the processed data is shared to a third-party platform.

Abstract: A method and system for detecting pin misalignment of ICs when being inserted into IC sockets includes a pressure sensing unit obtaining information as to pin insertion and pressure exerted by the pin and outputting the sensed information. A microprocessor receives the sensed information and obtains a pressure value correspondingly. Any misalignment of the pin is determined according to the pressure value so calculated.

Abstract: A method providing guidance to a vehicle for parking includes: obtaining information of potential parking space. Information of the parking space includes likelihood of finding unoccupied parking space and navigating to the parking space according to the information of parking space. The information of the parking space guides a driver to quickly find the parking space, thereby reducing parking time, improving parking space utilization, and efficiency of road traffic management. Calculating the likelihood of finding an unoccupied space is of great assistance to a driver.

Abstract: A method for monitoring working states of hard disks of a system of hard disks in a hard disk module includes a hard disk controller and a complex programmable logic device (CPLD). The hard disk controller and CPLD communicate with the hard disk module. The CPLD receives output signals from the hard disk controller and determines whether rise and fall changes in a clock signal of each output signal are steady. When a level change of the clock signal of one output signal is steady, the CPLD decodes the one output signal. When a level change of the clock signal of one output signal is not steady, the CPLD will stop decoding the one output signal. A related method is also provided.

Abstract: A method for optimizing camera layout for areas requiring surveillance comprises constructing a three-dimensional model of a scene subject to surveillance and related scene variables, configuring a computation range, constructing a plurality of simulation scenes using the three-dimensional model and the scene variables and recording the framing of pixels in the plurality of simulation scenes by a plurality of cameras according to the computation range, and further calculating the number of pixels required for visibility of an object to be recognized from the recorded framing of pixels. A camera set is selected from the plurality of cameras according to a convergence requirement, and a computation as to camera optimization layout is performed with the camera set to obtain one or more layout schemes.

Abstract: A system for detecting power failure in a dual processing system includes a first central processing unit (CPU), a second CPU, a power controlling unit, and a complex programmable logic device (CPLD). The power controlling unit is electrically coupled to the first CPU and the second CPU and the CPLD. The CPLD can determine a power failure occurring in relation to the first CPU and the second CPU. If power to the first CPU does not fail but power to the second CPU does fail, the CPLD controls the power controlling unit to stop supplying power for the second CPU only and make a certain number of power restart attempts. A method for detecting a power failure is also provided.

Abstract: A cooling device for data center includes: a housing chamber configured for housing the data center; an air inlet plenum positioned at one side of the housing chamber and configured for inflowing of external natural wind; an air outlet plenum positioned at another side of the housing chamber; an air return plenum defining two opposite ends communicated with the air inlet plenum and the air outlet plenum, and comprising a return air damper; a controller connected to the return air damper and adapted for controlling the opening and closing of the return air damper; and a refrigeration module located in the air inlet plenum and connected to the controller. A cooling system for data center is also provided.

Abstract: A device for managing an HDD backplane includes a mainboard and a backplane. The mainboard includes a first connector port and a second connector. The backplane includes a first HDD interface, a second HDD interface, an I2C selector, and a CPLD. The first and second HDD interfaces are both electrically connected to the CPLD. The first and second connector ports are both electrically connected to the I2C selector. The I2C selector is electrically connected to the CPLD. The CPLD receives an identification signal from the first HDD interface or the second HDD interface, and determines a type of HDD inserted in the first HDD interface or in the second HDD interface, and outputs a controlling signal to the I2C selector according to the type of HDD which is identified. The I2C selector turns on the first connector port and the second connector port according to the controlling signal.

Abstract: A lower-cost power distribution apparatus (PDU) using a lesser number of components that connects with many power supply units. The PDU comprises first and second switching modules, for outputting AC from a first or a second power source. The first switching module and the second switching module automatically switch between opposite states (turned on or turned off) based on the AC power source. At a given instant, the first switching module and the second switching module are in opposite states.

Abstract: A method for accelerating graphics processing units (GPUs) receives a request for usage of GPU resource sent by a user, calculates a quantity of GPUs which are necessary, and arrange the GPUs in several ways to maximize data transmission from and between the GPUs, and between the GPUs and one or more central processing units (CPUs) connected by switches between the GPUs and the CPUs. A device for accelerating GPUs is also provided.

Abstract: A method for managing an intercom system includes obtaining a householder management authority of an intercom official account by an intercom indoor device and transferring the householder management authority to a first mobile terminal of a householder. An intercom request can be generated by an access control device through which a visitor or other is seeking entry, the intercom request being received by the first mobile terminal of the householder. A communication with the access control device can be established, and the access control device can be controlled to open or not open a door. An intercom system is also provided.

Abstract: A system and method for monitoring hard disks includes a displaying unit, a hard disk controlling unit, and a complex programmable logic device (CPLD). The displaying unit displays status of hard disks. The hard disk controlling unit obtains statuses and outputs information as to status. The CPLD decodes the status information and determines whether the status of a hard disk is predictive failure analysis (PFA) according to the decoded signal. The CPLD controls the displaying unit to output PFA warning and delays other status displays for priority of the PFA. A method for monitoring is also provided.

Abstract: An electronic device providing visible indications as to the status of each hard disk in an internal hard disk module includes a housing, a display board, and hard disk controller. The display board displays the operating status of each disk of a plurality of hard disks. The housing defines a first mounting area and a second mounting area. The first mounting area and the second mounting area are spaced apart to form a slot, and the viewable display board is slidably mounted to the slot.

Abstract: A device with shock-absorbing qualities for fixing a hard disk in place on a chassis includes two brackets, a plurality of shock-absorbing cushions, and a plurality of first fasteners is described. The brackets located at opposite sides of a hard disk and the side surface of the bracket define a plurality of circular through holes with notches or cutaways continuing to the outer edge of the side surface. The cushions can be locked in the circular through holes after being introduced through the notches whilst sleeving the first fasteners. Two support portions are bent from ends of each bracket to support the hard disk in place.