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 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.

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 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 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 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.