42results about How to "Shorten the scan cycle" patented technology

The invention relates to a method for achieving synchronous control of a main shaft and an auxiliary shaft by means of a PLC. The method aims to achieve synchronous control of the two shafts on the premise of low cost. According to the technical scheme, a complex function needing to be achieved through multiple steps in a high-functioning medium or large PLC of other companies just needs to be realized through one instruction in the small PLC used in the method. If the complex function is achieved by using multiple instructions, the sampling period depends on the scanning period of the PLC in most cases; when a PLC program is large, the scanning period is very long, consequently a response lag of the auxiliary shaft is caused, the output pulse interval is large, a motor runs unstably, and positional accuracy is poor. The synchronization instruction is convenient to use and good in synchronization performance. Meanwhile, the execution efficiency of the PLC is greatly improved, and the scanning period of the whole PLC is shortened. Thus, the industrial movement control response is rapider, and position control is more accurate.

The invention relates to a method for identifying steel coil information, being characterized by comprising the following steps: determining the position coordinates of a coil number in the obtained steel coil image by using a minimum bounding rectangle method, and then converting the steel coil image state characteristics at the position coordinates into character values by using a convolutional neural network-based digital character classification mode, so that the character values are the coil number of the current steel coil; and using a temperature detection module to detect the temperature of the steel coil while obtaining a side face image of the steel coil, obtained by shooting through the camera, judging whether the roundness of the steel coil reaches the standard or not through the side face image by an upper computer, and transmitting the judgment result to the background. According to the method for identifying steel coil information, rapid identification of the steel coil is achieved; the scanning period is shortened; and the logistics efficiency is improved. The method for identifying steel coil information can accurately detect the information of the steel coil, is high in the detection speed, and has the characteristic of real-time performance.

The invention discloses a data communication method for electronic shelf labels, which comprises the following steps: when a data transmission instruction sent by a server is received, calling a wireless transceiving device to send a wake-up data packet to all the electronic shelf labels in a wireless working mode so as to wake up the electronic shelf labels; receiving a broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing a communication connection with a target electronic shelf label according to the broadcast; and carrying out data communication with the target electronic shelf label in the Bluetooth working mode. The data communication efficiency of the main-end device and the electronic shelf label can be improved, and the power consumption of theelectronic shelf label is reduced. The invention also discloses a data communication system of the electronic shelf label, a computer readable storage medium, a communication main end and the electronic shelf label, which have the above beneficial effects.

The invention discloses a touch scanning method and device. The method includes: starting screen scanning, and when detecting a touch, determining the position of a corresponding touch point on a touch screen when the touch occurs; according to the determined position, determining a set-sized area, including the corresponding touch point when the touch occurs, as a scan area which is smaller than the touch screen; performing touch scanning at least in the scan area. The method and device has the advantages that the touch in the scan area can be scanned by determining the scan area smaller than the touch screen, touch scanning period is shortened, the scan area is updated in real time with sliding of the touch, the problems such as low touch response speed, discontinuous touch and touch errors caused by touch delay are solved, and meanwhile, the scan range is narrowed, and accordingly energy consumption is lowered and energy loss is low.

The invention provides a loop vehicle detector which is internally provided with a plurality of external feeder lines, a secondary coil inductance connected with the external feeder lines, a channel scanning circuit connected with the secondary coil inductance and a singlechip connected with the channel scanning circuit, wherein the singlechip controls the channel scanning circuit to open the next input channel and close the previous one; and when the singlechip detects that the connection between one of the input channels and the external feeder lines is interrupted, the singlechip shields the input channels and detects the next input channel, thereby shortening the scanning period, accelerating the scanning frequency, enhancing the system precision and improving the reliability of data acquisition compared with the prior art.

The invention provides a distributed frequency spectrum monitoring system. The distributed frequency spectrum monitoring system comprises a monitoring control center used for sending a monitoring taskA, and a plurality of monitoring receivers for collecting and transmitting back frequency spectrum data; a monitoring processor is connected between the monitoring control center and the monitoring receivers; the monitoring processor comprises a cooperative scheme formulation module and a data analysis processing module; the cooperative scheme formulation module formulates a scheduling monitoringscheme B and a monitoring command C according to a demand of the monitoring task A, and performs selection, grouping, labeling and synchronization according to the scheduling monitoring scheme B; each of the monitoring receivers collects frequency spectrum data according to the monitoring command C; and the data analysis processing module receives and analyzes the frequency spectrum data transmitted back by each of the monitoring receivers, and transmits analyzed signal data back to the monitoring control center. The invention further provides a frequency spectrum monitoring method based on the system. The frequency spectrum monitoring method provided by the invention simultaneously has good scanning period, spectral resolution and receiving sensitivity.

The invention discloses an infrared touch screen and a detection method thereof. An infrared emission tube array of the infrared touch screen consists of a plurality of emission units comprising infrared emission tubes; an infrared receiving tube array consists of a plurality of receiving units comprising infrared receiving tubes; the number of the emission units and the number of the receiving units included in the infrared emission tube array and the infrared receiving tube array which are arranged in the same direction are the same and the emission units and the receiving units are in one-to-one correspondence; the number of the infrared emission tubes and the number of the infrared receiving tubes included in each group of emission units and each group of receiving units which are arranged in the same direction are the same and the infrared emission tubes and the infrared receiving tubes are in one-to-one correspondence; the number of gating circuits is equal to the sum of the number of the receiving units and the number of the emission units; and each gating circuit is connected with one receiving unit or one emission unit. The infrared touch screen has the advantage of high response speed; and the detection method of the infrared touch screen has the advantage of short detection period.

The invention relates to a PLC (Programmable Logic Controller) with a synchronous pulse output function The PLC is characterized by comprising a separate single-chip microcomputer and a programmable logic device, wherein the programmable logic device comprises a high-speed counter module, a communication control module and a high-speed pulse output module. The PLC has the following advantages: firstly, synchronous commands of the PLC are convenient to use and have good synchronization performance; meanwhile, the execution efficiency of the PLC is greatly increased, and the whole scanning period of the PLC is shortened; therefore, industrial movement control response is faster, and position control is more accurate; secondly, the PLC can simultaneously carry out synchronous operation on multiplex pulses and is suitable for a multi-shaft controlled movement system; and thirdly, the PLC can be applied to flying shears and devices needing two or multiple synchronous motors for fixed length cutting and the like and has good social benefits.

The invention relates to a high-accuracy rotation locating control device of a double-station plastic injecting and blowing hollow molding machine, which comprises a master control module as well as an electronic ruler data acquisition module, a servo motor drive and encoder module, a sensing limit switch module, a human-computer interface module, a communication interface module and a storage module that are respectively connected with the master control module, wherein the master control module comprises an embedded ARM microprocessor, an alarm output module, a power supply module, a reset circuit and a JTAG debugging interface circuit; and the embedded ARM microprocessor of the master control module is connected with an input / output interface of a PLC, is used for receiving starting rotation direction information and resetting information which are sent out by a PLC host machine, and transmitting clockwise and counterclockwise rotation located information into the PLC host machine. The device is provided with a special human-computer interface device, thus realizing high-accuracy rotation location, and not influencing the user program execution period; the device has multiple communication ways so as to realize interaction with a human-computer interface of a control system and the communication with an upper computer; and the device has high cost performance.

The invention discloses a multi-material mixing system and a method thereof, and belongs to the technical field of material loading and unloading. The system comprises monitoring equipment, exchange equipment, material mixing programmable controller, a weighing programmable controller, loading and unloading equipment, a material distributing cabin, feeding equipment, weighing equipment and a total material cabin, wherein the monitoring equipment is connected with the exchange equipment; the exchange equipment is respectively connected with the material mixing programmable controller and the weighing programmable controller; the material mixing programmable controller is respectively connected with the loading and unloading equipment, the feeding equipment and the material distributing cabin; the weighing programmable controller is connected with the weighing equipment; the loading and unloading equipment is used for unloading the material to the material distributing cabin according to weighing result of the weighing equipment; the feeding equipment is used for mixing the material to the total material cabin through a material mixing conveyer belt according to the weighing result of the weighing equipment. According to the invention, closed loop control of a feeding machine is achieved through the material mixing programmable controller and the weighing programmable controller, and the purposes that the scanning period is shortened, the signal processing capability is improved, and the material mixing quality is improved, are achieved.

The invention discloses a scanning method of an infrared touch frame and the infrared touch frame. The method comprises the following steps: controlling N emitters on a first border of the infrared touch frame to synchronously emit infrared signals to N receiver groups on a second border at a preset emitting angle; detecting the intensity of infrared signals received by each receiver group; obtaining a position of a emitter corresponding to a receiver group when that the intensity of the infrared signals received by any receiver group is lower than a preset threshold value is detected; calculating the coordinate of a current touch area according to the position of the emitter and the emitting angle of the emitter. The method realizes the fact of shortening the scanning period of the infrared touch frame, and improves the scanning speed for scanning a whole frame of the infrared touch frame.

The invention relates to a high-precision multi-microwave frequency measurement method based on double optical frequency combs and stimulated Brillouin scattering, and the method comprises the steps: generating two paths of coherent optical frequency combs through employing the same laser, and enabling the two paths of coherent optical frequency combs to serve as optical carriers to be inputted into two double-parallel Mach-Zehnder modulators; and carrier suppression single side band modulation is carried out on the microwave signal to be measured and the scanning signal. The two paths of modulated optical signals are respectively used as signal light and pump light to be input into the stimulated Brillouin scattering effect structure, then the optical comb teeth are decomposed through the optical demultiplexer, and the frequency value of the signal to be measured can be estimated by measuring the power value of the optical signal output by each channel. In order to further improve the algorithm precision, an amplitude comparison function is established by using the measured optical power value to calculate a frequency measurement error, and frequency precise measurement can be realized by performing error correction on the frequency measurement value. By adopting the method, high-precision frequency measurement of a plurality of microwave signals can be realized, and the method has wide application value in the aspects of communication, radar, electromagnetic spectrum sensing and the like.

Embodiments of the invention provide a signal processing method, a computer device, and a computer readable storage medium. The method comprises: acquiring k electromagnetic waves carrying a synchronization signal, wherein k is a number of areas obtained by equally dividing a horizontal coverage of a base station, and the electromagnetic waves have the same beam width and different propagation directions; and in the same radio frame, transmitting an electromagnetic wave to each area, so that the UE in the area receives the electromagnetic wave and synchronizes according to the synchronizationsignal. The method provided by the embodiments of the invention divides the horizontal coverage of the base station into areas, and in the same radio frame, transmits an electromagnetic wave carryinga synchronization signal to each area, and the multi-beam scanning method reduces the scanning range, thereby shortening the scanning period, and further shortening the delay in acquiring the synchronization signal by the UE.

The invention provides a Mesh neighbor scanning method and device. An AP firstly determines at least one channel corresponding to a first bandwidth supported by the AP, and then channels which are notincluded in a scan forbidden list in the at least one channel are used as to-be-scanned channels; when the Mesh neighbor is not scanned from the to-be-scanned channels, the to-be-scanned channels areadded to the scan forbidden list to avoid repeated scanning of the same channel, so that the channel scanning cycle is greatly reduced and the scanning efficiency is improved.

The invention provides a loop vehicle detector which is internally provided with a plurality of external feeder lines, a secondary coil inductance connected with the external feeder lines, a channel scanning circuit connected with the secondary coil inductance and a singlechip connected with the channel scanning circuit, wherein the singlechip controls the channel scanning circuit to open the next input channel and close the previous one; and when the singlechip detects that the connection between one of the input channels and the external feeder lines is interrupted, the singlechip shields the input channels and detects the next input channel, thereby shortening the scanning period, accelerating the scanning frequency, enhancing the system precision and improving the reliability of data acquisition compared with the prior art.

The invention discloses a foundation microwave deformation monitoring system, which adopts a linear frequency modulation continuous wave system and utilizes components such as a DDS (Direct Digital Synthesizer) and a PLL (Phase Locked Loop) to generate emission signals, so that the system cost can be reduced while the size and the weight of equipment are reduced; the linear frequency modulation continuous wave system foundation microwave deformation monitoring radar samples the difference frequency signal after adaptive gain processing, and since the bandwidth of the difference frequency signal is far smaller than the baseband bandwidth of the transmitted signal, the sampling rate requirement on the ADC is greatly reduced, the data rate in the whole data chain is reduced, and the data transmission efficiency is improved. And high-performance transmission and storage elements are avoided, so that the system cost is further reduced. The system provided by the invention has the advantages of light weight, low cost, high real-time performance and high integration level.

The invention discloses a laser scanning control method for waveguide type liquid crystals. The method comprises the following steps of (1) arranging an electrode driving layer above a liquid crystallayer and arranging a plurality of independently controlled electrodes on the electrode driving layer, wherein one end of each electrode is provided with a laser angle control part and each laser angle control part comprises an incoming edge and an outgoing edge to ensure that both the incoming edge and the outgoing edge are straight edges and are mutually intersected or extension cords of the incoming edge and the outgoing edge are intersected; (2) respectively arranging the plurality of independently controlled electrodes as a zero-level electrode, a first-level electrode, ..., an N-level electrode along the laser incidence direction; (3) selecting the zero-level to the N-level deflection electrodes to apply positive or negative voltage according to a to-be-deflected angle; and (4) removing the positive or negative voltage when the liquid crystal level under the N-level deflection electrode achieves full deflection. The method is capable of calculating the voltage application manneron the electrodes in advance according to the characteristics of the waveguide type liquid crystals, so as to rapidly realize the continuous laser scanning of the waveguide type liquid crystals.

The invention provides a laser scanning electrode structure. The laser scanning electrode structure comprises a liquid crystal layer, an electrode driving layer is arranged above the liquid crystal layer, an electrode driving device is arranged on the electrode driving layer, the electrode driving device comprises a laser angle control part, the laser angle control part comprises an incident edgeand an emergent edge, the incident edge and the emergent edge are straight edges and are intersected with each other or extending lines of the incident edge and the emergent edge are intersected witheach other, and the electrode driving device is electrically connected with the liquid crystal layer. Through the arrangement of the liquid crystal layer and the electrode driving device, the refractive index of the liquid crystal layer can be changed through electrode control, and therefore, the change of the laser propagation direction is achieved. Because of the fact that a discrete electrode structure is adopted, when high sampling frequency and high-precision regulation and control are achieved, the requirement for later-period electric control signals is greatly lowered, and accurate control over the scanning angle by the voltage is achieved.

The invention discloses a Bluetooth scanning control method, a mobile terminal and a storage medium. The method comprises the steps of, after a Bluetooth scanning instruction is received, setting filtering attribute information, wherein the filtering attribute information is equipment attribute information of Bluetooth equipment to be filtered in the Bluetooth scanning operation; acquiring the filtering attribute information, carrying out Bluetooth scanning according to the filtering attribute information; and displaying Bluetooth equipment information obtained by scanning. According to the embodiment of the invention, when Bluetooth scanning is carried out, the Bluetooth scanning operation is executed according to the Bluetooth equipment information corresponding to the set filtering attribute information, the filtered Bluetooth equipment is obtained, and the filtered Bluetooth equipment is displayed, so that the scanning period is shortened, and the purpose of rapid scanning is achieved.

The invention discloses an electric braking control system against mistakenly stepping on an accelerator during braking. The electric braking control system comprises a braking control system against mistakenly stepping on the accelerator during braking and a protection device, wherein the braking control system against mistakenly stepping on the accelerator during braking comprises a braking control system, an oil supply control system, a warning device, a preparation device, a car accelerator pedal movement speed signal generator and a PLC (Programmable Logic Controller). When the accelerator of a car is abnormally stepped on, acceleration can be changed into braking automatically and instantly; and since a digital quantity signal generated by the car accelerator pedal movement speed signal generator in real time can be directly recognized by the PLC, the speed of the overall system in response to braking is ensured to be higher. The protection device is used for providing a signal to the PLC when the car overtakes and accelerates normally, the PLC automatically blocks possible error output at the time, so that the potential safety hazard brought by missing of additional operations is eliminated; when the car drives normally, the PLC unblocks the output blockage automatically, so that the system performs normally to ensure that driving of the car is safer.

The invention discloses a delay request processing method and device based on a token bucket, relates to the technical field of communication, and is invented for shortening the scanning period during delay request processing. The method includes: receiving a delay request message of a queue corresponding to the token bucket, the delay request message including a delay request time; judging whether the delay request message needs to be processed first according to the delay request time; and determining that the delay request message needs to be processed first , the delay request message is processed in a priority processing manner. The present invention can be used in the processing technology of delayed request.

The invention relates to a method for improving the touch accuracy of an infrared touch screen. Two sets of scanning lines with different inclination angles are used, and the number of areas where each set of scanning lines is blocked by a touch point is determined according to the situation that each set of scanning lines is blocked by a touch point. The one with the larger number of occluded areas in the two groups of rays is selected as the actual number of touch points, so as to avoid the situation that two touch points are mistaken for one touch point. And after determining the start boundary and end boundary of each touch point according to the situation that the first group of scan lines is blocked, and then combining the width value of each touch point determined according to the situation that the second group of scan lines is blocked, determine two The initial border and termination border of each touch point separate the two touch points, solve the problem of merging two touch points due to insufficient scanning distance, and improve the touch accuracy of the infrared touch screen.

The invention relates to a five-path laser radar for a vehicle and a control method of the five-path laser radar. The five-path laser radar comprises a radar controller, and five paths of transceivers in fan-shaped arrangement, wherein each path of transceiver respectively comprises a laser emitting lens tube and a laser receiving lens tube, the center axes of the five paths of transceivers are all crossed at the same point on the same plane, and in addition, the included angle between the adjacent laser emitting lens tubes is identical. When the five-path laser radar is used, the five paths of transceivers are firstly controlled for sequentially emitting and receiving laser pulses, the interval time is identical, then, the passing time t between the emitting and the receiving of each path of laser pulses is calculated, next, the t is subjected to twice screening through a formula that t is greater than or equal to t and smaller than or equal to 1mus and the variance, the threshold and the circulation number group, then, the qualified t average value in the cyclic number group is calculated, and finally, the region of obstacles, the distance between the obstacles and the vehicle and the relative speed are determined according to the average value, so obstacles are avoided. The design has the advantages that the scanning period is short, the structure is simple, in addition, the cost is lower, the anti-shock performance is higher, and the detection distance, the range and the precision can meet the vehicle requirements.

The invention provides a touch positioning method and device for an infrared touch screen. Divergent scanning is performed on the infrared touch screen in a first direction to obtain all areas under scanning which are to be further scanned in a second direction, wherein each scanning area includes a quasi-touch area; all the areas under scanning are scanned at a preset scanning angle in the seconddirection to obtain real touch areas, wherein the first direction is perpendicular to the second direction. Scanning in the second direction only requires scanning all the areas under scanning with no full scanning required, and therefore, the scanning period can be shortened.

The invention discloses an automatic slide scanning system and a control method, the scanning system comprises a scanning unit, a slide taking unit, a transfer station and a control unit, and the control unit controls a clamping device to execute actions. The action is the shorter one of a waiting action for waiting the scanning unit to complete residual scanning and a taking-out action of taking out a to-be-scanned slide and placing the to-be-scanned slide in the transfer station. Through the arrangement, the transfer station is arranged, so that a position for placing a slide can be additionally provided besides a normal scanning process, the slide taking action is realized while scanning is performed, the slide taking waiting time after each time of scanning is saved, and due to comparison and selection of the action time, the whole action process cycle of scanning and taking and placing the slide can be further optimized, the effect of obviously shortening the scanning cycle is achieved, and the working efficiency is improved.

The invention provides a touch positioning method and device for an infrared touch screen. Divergent scanning is performed on the infrared touch screen in a first direction to obtain all areas under scanning which are to be further scanned in a second direction, wherein each scanning area includes a quasi-touch area; all the areas under scanning are scanned at a preset scanning angle in the seconddirection to obtain real touch areas, wherein the first direction is perpendicular to the second direction. Scanning in the second direction only requires scanning all the areas under scanning with no full scanning required, and therefore, the scanning period can be shortened.

A controller cluster device applied to a thermal power plant comprises two or more base plates, eight slots are evenly distributed in each base plate, each slot corresponds to one controller, and eachcontroller is connected to a base plate slot through a redundant PCIE bus. Every two adjacent bottom plates are connected through a redundant PCIE bus, all controllers in the device are arranged in acluster mode and are connected with one another with the bottom plates as links, a redundant PCIE bus network is constructed, and data interaction is conducted between the controllers through the redundant PCIE bus. The controller adopts a dual-computer hot standby mode, a pair of redundant controllers is formed by a main controller and a standby controller, and a redundant gigabit Ethernet interface is designed on each controller. According to the device, the data interaction speed between the controllers can be greatly improved, the undisturbed switching performance of the dual-computer hotstandby controller, the system clock synchronization time tick precision and the control precision of the controller on the I / O card can be greatly improved, and convenience is provided for operationmaintenance and upgrading of a DCS of the thermal power plant.

The invention provides a heterogeneous network cross-domain fusion switching method, which comprises the following steps that: S1: a mobile terminal accessed to a heterogeneous network adaptively scans a currently accessed wireless network and surrounding wireless networks, and uploads collected data to a wireless access point; S2, each wireless access point in the control range of the centralizedhub node periodically measures network attribute data in the range of the wireless access point and uploads the network attribute data to the centralized hub node; S3, the centralized hub node performs service awareness according to the data uploaded by the wireless access point and performs switching pre-judgment; S4, the centralized hub node performs service quality perception according to thenetwork attribute data in the available network list, and selects an optimal network from the remaining networks for switching; and S5, the attribute data of the current connection network by the centralized hub node is periodically measured, the attribute data is kept unchanged if the performance meets the requirement, and otherwise, it is returned to the step S1 to execute.

The invention discloses a beam scanning method and device and network side equipment, and belongs to the technical field of communication. The beam scanning method comprises the following steps: determining a scanning interval angle of scanning beams used for sending a synchronization signal block, wherein the scanning interval angle is an included angle between two adjacent scanning beams; and transmitting the plurality of scanning beams at the scanning interval angle to perform beam scanning so as to send the synchronization signal block.

The invention relates to a method for achieving synchronous control of a main shaft and an auxiliary shaft by means of a PLC. The method aims to achieve synchronous control of the two shafts on the premise of low cost. According to the technical scheme, a complex function needing to be achieved through multiple steps in a high-functioning medium or large PLC of other companies just needs to be realized through one instruction in the small PLC used in the method. If the complex function is achieved by using multiple instructions, the sampling period depends on the scanning period of the PLC in most cases; when a PLC program is large, the scanning period is very long, consequently a response lag of the auxiliary shaft is caused, the output pulse interval is large, a motor runs unstably, and positional accuracy is poor. The synchronization instruction is convenient to use and good in synchronization performance. Meanwhile, the execution efficiency of the PLC is greatly improved, and the scanning period of the whole PLC is shortened. Thus, the industrial movement control response is rapider, and position control is more accurate.