13results about How to "Avoid time error" patented technology

The invention relates to the technical field of spectacle lens processing, in particular to optical spectacle lens polishing equipment which comprises a bottom plate, a polishing unit and a locking mechanism. The rotating ring and the pushing plates and the clamping blocks on the rotating ring jointly clamp the circumferential face of the spectacle lens and conduct self-locking, so that the rotating ring and the spectacle lens are integrated, in the follow-up polishing face replacing process, the rotating ring is moved upwards and turned over, the spectacle lens is placed on the vertical plate, and the polishing face is replaced. In the process, the reference of the rotating ring is always taken as the reference of the spectacle lens, so that the problem that the processing time and the processing error are increased due to the fact that the reference of the spectacle lens needs to be repositioned in the process of replacing the polished surface is solved; the polishing device is suitable for the polishing machining process of two spherical surfaces of the spectacle lens, the swing path of the polishing plate is limited in the polishing process, and the polishing precision and stability are improved.

The invention relates to the technical field of ranging and positioning, in particular to a high-precision optical communication ranging and positioning method and system suitable for underwater. The method comprises the following steps: S1, generating and sending a laser signal through a laser; s2, encoding data to be transmitted and modulating the data to a laser signal through a quadrature amplitude modulation scheme for data transmission; s3, emitting the modulated laser signal, aligning the modulated laser signal with a target, and receiving an optical signal returned from target equipment; s4, demodulating the received laser signal based on a coherent demodulation method, and recovering information loaded by the laser signal; and S5, after receiving the demodulated signal, calculating the relative distance by using the distance measurement frame information contained in the signal through a distance measurement positioning unit. According to the invention, the laser communication technology is applied to underwater, and the flight time distance measurement positioning technology is combined, so that the advantages of high precision, high anti-interference performance and low energy consumption are satisfied under the condition of low power consumption.

The invention relates to the technical field of vehicle driving intelligent control based on the Internet of Vehicles, and discloses a vehicle driving intelligent control method based on the Internet of Vehicles, which is characterized in that obtaining of starting place and destination information of a user is the basis of a navigation system, it is ensured that an optimal path from the current position of the user to the destination can be accurately calculated, and the system generates a plurality of paths; distance, time, road conditions and the number of traffic lights are comprehensively considered, diversified choices are provided, the traffic lights serve as segmentation points to divide routes, the system carries out refined path analysis, the driving strategy of each road section is adjusted in a personalized mode, the overall driving efficiency is improved, lanes of each road section are distinguished in detail, the system can accurately plan and adjust the routes, and the driving efficiency is improved. A high-precision map and real-time vehicle information provide data support for dynamic adjustment of a driving strategy, and by analyzing road and vehicle data, the system can recognize dangerous points in advance and optimize a driving path to help a user to make an optimal choice.

The invention relates to the technical field of electronic product manufacturing, and discloses an electronic product auxiliary material assembling mechanism and method.The electronic product auxiliary material assembling mechanism comprises a base, a rotating table is rotationally connected to the base and driven by a driving unit, a plurality of fixing bases are evenly distributed on the top face of the rotating table, and positioning mechanisms are installed on the fixing bases; the positioning mechanism comprises a conveying belt and further comprises two rotating arms symmetrically installed at one end of the fixing base, and one end of each rotating arm is hinged to a positioning plate. According to the electronic product auxiliary material assembling mechanism, in the intermittent rotation process of the rotating table, the conveying belt drives a circuit board to move towards one side, then the positioning plate carries out centering positioning on the circuit board, then the driving unit drives the conveying belt to rotate reversely, the positioned circuit board is conveyed to an assembly line, conveying at equal time intervals and equal intervals is achieved, and the production efficiency is improved. Therefore, the positioning time of the visual system and the moving adjustment time of the mechanical arm are saved, and the mounting efficiency and the mounting quality of the auxiliary materials are improved.

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.

The invention is suitable for the technical field of material science and corrosion control, and particularly relates to a timing-controllable electrified corrosion device which comprises a corrosion box body and a constant-current power supply, a negative electrode of the constant-current power supply is connected with a carbon rod through a wire, and a plurality of storage racks are movably connected into the corrosion box body; an outer hanging frame is arranged on the side face of the corrosion box body, and a timing control assembly is placed in the outer hanging frame. By arranging the timing control assembly, accurate timing control over a corrosion experiment is achieved, and automation and consistency of experiment operation are ensured. The timing control assembly comprises a processing system, a control panel, a display screen and a relay, a user can set specific power-on time through the control panel, the processing system accurately controls the on-off state of the relay according to the set time, and therefore automatic on-off of the constant-current power supply is achieved.

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 invention relates to the technical field of engineering machinery oil mass monitoring, in particular to an automatic oil mass calibration method and system for an engineering machinery oil tank. The method comprises the following steps: taking a union set of refueling time uploaded by software and hardware, inquiring fuel quantity data monitored by a fuel quantity sensor within a time range according to determined refueling starting time and refueling ending time, and drawing a fuel quantity height curve; whether the vehicle is stably parked or not is judged according to the change condition of the curve slope, after the stable parking time point of the vehicle is found, the actual refueling starting time and the actual refueling ending time are searched according to the curve slope change condition of the later time point, and meanwhile when it is judged that oil exists in the neck of the oil tank, oil quantity data in the neck of the oil tank are filtered out; and obtaining a final fuel quantity height curve, calculating the refueling quantity and the refueling time in a segmented manner, and performing calibration. Whether the vehicle is stably parked or not is judged through the slope of the oil mass height curve, the refueling starting time and the refueling ending time are accurately determined, neck data of the oil tank can be filtered, and the accuracy of calibration data is improved.

The present invention discloses a method and system for automatic length determination of cut-to-length steel plates based on machine vision, the method comprising: installing a monitoring camera at the edge of a roller after cut-to-length; placing a ruler below the shooting position of the monitoring camera at the edge of the roller; obtaining the length of the steel plate to be cut to length, determining the camera responsible for measuring the current cut-to-length length by calculation, and sending a confirmation signal responsible for the cut-to-length measurement to the determined camera, while the other cameras do not work; when the camera receives the above confirmation signal, it calculates the pixel position in the camera where the cut-to-length steel plate should be when the cut-to-length length is reached, as a target point; then the steel plate area position in the real-time collected image is analyzed, and when the steel plate area position reaches the pixel position of the target point, the automatic length determination of the current cut-to-length steel plate is completed. The present invention requires low hardware cost, is easy to install and implement, and can achieve high detection accuracy. It is a solution with high cost performance to reduce labor costs and realize automatic cut-to-length cutting of steel plates.

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.