6results about How to "Avoid time error" patented technology

A double channel dust sensor in vehicle relates to the technical field of automobile sensor, including base, upper cover, first air inlet pipe, first exhaust pipe, second air inlet pipe, second exhaust pipe, PCB board, fan, inner cover, light emitting tube, light receiving tube, first lens and second lens, the lower side of upper cover is equipped with base, both ends of base are equipped with first light path area and second light path area, the upper side of first light path area and second light path area is equipped with inner cover, fan and PCB board in turn, both in first light path area and second light path area are equipped with light emitting tube and light receiving tube, both ends of base are equipped with first air inlet pipe, first exhaust pipe, second air inlet pipe and second exhaust pipe respectively;The utility model discloses a double channel independent sampling structure, obtains dust concentration data in two space positions simultaneously, avoids the time sequence error caused by turn -to -turn sampling, improves the spatial comparative analysis ability and data timeliness of air quality monitoring, through common main control circuit and power supply system, reduces overall energy consumption and manufacturing cost.

The utility model discloses a kind of cable combustion test chamber, including cabinet, rack is arranged in the cabinet, the lower part of the rack is provided with the bottom platform of moving along Y axis direction and the Y axis translation mechanism connected with bottom platform, bottom platform is provided with the operation platform of moving along X axis direction and the X axis translation mechanism connected with operation platform, operation platform moves and is arranged in rack top surface, rack top surface one side is equipped with the clamping frame of clamping cable, operation platform is equipped with the combustion assembly that can swing to the clamping frame below. The utility model adjusts the horizontal position of the combustion assembly on operation platform by Y axis translation mechanism and X axis translation mechanism, so that combustion assembly accurately aims at cable on clamping frame and applies and removes flame, to improve measurement result;While combustion assembly can quickly swing to apply and remove flame, avoid time error due to artificial observation flame when artificially controlling combustion test start, stop, to further improve measurement accuracy.

This invention belongs to the technical field of automotive vehicle networking systems, specifically relating to a method for calibrating the time of a T-BOX system. The method is applied to an OpenCpu module, a storage module, and a communication module that perform T-BOX system time calibration. It includes determining whether the communication module successfully obtains the network time; if unsuccessful, it retrieves the real-time time from historical timestamps in the storage module and defines the real-time time as the reference time T. 1 If successful, the network time is defined as the base time T. 1 The method proposed in this invention enables the vehicle-mounted T-BOX hardware to successfully achieve timekeeping even without a timing function, and solves the problem of system time synchronization issues when the vehicle-mounted T-BOX has poor GPS signal or GPRS network conditions. When the signal is poor, the system's self-running time is calibrated in real time through a calibration coefficient to prevent timekeeping errors during the time calibration process.

The application discloses a video synchronization method, a distributed system and a computer program product, the method comprising: taking the time of the master device as a time reference, synchronizing the local clock, vertical synchronization signal phase and the start time of the first frame of video of all slave devices based on the PTP protocol; when any device performs video frame decoding abnormally, sending a notification to all other devices in the distributed system to delete the video frame corresponding to the display timing; all devices in the distributed system dynamically adjust the picture update rate based on the accumulator cycle until the picture update rate is aligned with the display refresh rate, end the cycle, and display the decoded video frame according to the video frame display timing, so as to solve the problem that the time stamp is affected by the network signal and the timer is affected by the operation time error, resulting in the display of the master and slave devices being out of synchronization or there being picture tearing.

The application discloses a dust remover blowing event data collection method and system, and relates to the technical field of dust remover data collection. When the first pulse valve action in a blowing sequence corresponding to a target collection object is detected, the blowing ash removal cycle is determined to start, and the multi-source operation signals associated with the target collection object are synchronously collected in the blowing ash removal cycle. The lifting valve state at the start of the blowing ash removal cycle is used to determine the blowing type. When the preset ending condition is met, the blowing ash removal cycle is determined to end. The dust remover blowing event data collection method and system adopt a multi-mode data strategy combining periodic uploading and event triggered uploading. The low frequency statistical summary uploading is used for regular monitoring to maintain system baseline monitoring, and the complete original waveform data is uploaded for deep diagnosis in the key blowing ash removal and opening box events.

The application provides an immersed ultrafiltration membrane detection device, which comprises a control unit, an air source unit, a pressure sensor and an air inlet pipeline; the air source unit is used for being connected with an air inlet end of the immersed ultrafiltration membrane; the pressure sensor is arranged on the air inlet pipeline; the air source unit and the pressure sensor are electrically connected with the control unit; the control unit is used for controlling the air source unit to be opened or closed; the pressure sensor is used for measuring a first pressure value and a second pressure value after a set time; the control unit is used for receiving the first pressure value and the second pressure value, calculating a difference value between the first pressure value and the second pressure value, and judging that the immersed ultrafiltration membrane is damaged when the difference value between the first pressure value and the second pressure value is greater than a set pressure difference value. The immersed ultrafiltration membrane detection device provided by the application has high measurement precision.