67results about How to "Accurate load" patented technology

The invention discloses a comprehensive performance test bench for a planetary roller screw. A driving assembly provides power for the planetary roller screw; a test assembly is used for mounting a planetary roller screw of a different model; a hydraulic loading assembly is adopted to carry out dynamic and static loading on a planetary roller screw nut, load borne by the planetary roller screw during actual work is simulated, and a force closed loop is adopted to ensure accuracy of the loading force. The test bench is provided with a torque sensor, an angle encoder, a circular magnetic grating, a grating ruler, a LVDT, and a force sensor. Measurement on torque, an angle, displacement and force is realized through the sensor. Through analyzing the test data, test on performance of the position precision, the speed, the acceleration, the transmission efficiency, the transmission clearance and the axial stiffness of the planetary roller screw of the different model in the load state can be completed. The test bench has the advantages of simple and flexible structure, thorough and accurate test performance parameters, high loading precision and strong test scalability.

The invention provides a voltage-type wireless power supply system load identification method and system. The load identification method includes the steps: building a voltage-type IPT (inductive power transfer) system; connecting a first capacitor into a primary circuit and enabling the primary circuit to enter a resonant state; detecting current of the primary circuit by a current detecting device to obtain a first effective value; closing a switch, connecting the first capacitor and a second capacitor into the primary circuit after parallelly connecting the first capacitor and the second capacitor, adjusting working frequency of an inverter by a controller and enabling the primary circuit to enter a resonant state; detecting the current of the primary circuit by the current detecting device to obtain a second effective value; building an impedance equation by the controller according to the first effective value and the second effective value of the current of the primary circuit and the corresponding working frequency to obtain equivalent load impedance ZL. A primary compensation capacitor Cp of the voltage-type IPT system comprises the first capacitor and the second capacitor which are parallelly connected, and the second capacitor is connected and disconnected by the controller through the switch. A load can be accurately detected, and the IPT system enters the best power transmission phase.

The invention discloses a load-balance-based satellite network on-demand routing method, which mainly solve the problem of unbalanced traffic load in the conventional satellite network. The load-balance-based satellite network on-demand routing method comprises the following steps that: when a source node sends data, the minimum rectangular region of a routing request is limited according to orientations of the source node and a target node; the source node sends a routing request (RREQ) packet to an intermediate node in the minimum rectangular region; when receiving the RREQ packet for the first time, the intermediate node starts a node load judgment mechanism and selectively forwards the RREQ packet according to a judgment result; when the intermediate node forwards the RREQ packet, theRREQ packet is forwarded to a node with the consistent direction with the target node; the target node replies a routing response (RREP) packet to a route with the minimum load value from the received RREQ packet in a delayed response mode; and after receiving the RREP packet, the source node starts to send data so as to complete the route discovery process. Compared with a method employing the conventional routing protocol, the load-balance-based satellite network on-demand routing method has the advantages that: the accurate traffic load balance of the satellite network can be realized; andthe cost of a network route is reduced.

The invention discloses a detection device and a detection method for photovoltaic anti-islanding test. The detection device is composed of an upper computer, more than one intelligent power monitoring module, an I / O relay control plate, keyset K and a load module; the upper computer PC machine is connected with each intelligent power monitoring module and I / O relay control plate respectively through the CAN bus; the I / O relay control plate is connected with the load module through the keyset K; the load module is composed of a numerical value adjustable resistive load R, inductive load L and capacitive load C. The detection method judges whether the grid-connected measured voltage V satisfies the formula and judges whether the islanding phenomenon occurs after uploading the load module. The detection device and the detection method can exactly detect the islanding effect and are applied to various large capacity power devices for test.

The invention discloses a hydraulic motor starting performance testing device which comprises a swinging hydraulic cylinder, a hydraulic system and an installation platform. A testing frame, a first transmission supporting frame, a second transmission supporting frame and a limiting supporting frame are arranged on the installation platform. Torque revolving speed sensors are arranged on the testing frame. The first transmission supporting frame and the second transmission supporting frame are arranged on the two sides of the testing frame respectively and connected with transmission shafts of the torque revolving speed sensors through couplers. The first transmission supporting frame is connected with the output shaft of a tested hydraulic motor and the second transmission supporting frame is connected with the output shaft of the swinging hydraulic cylinder. The swinging hydraulic cylinder is a gear and rack swinging hydraulic cylinder with an outwards-extending piston rod. The extending end portion of the piston rod of one side of the swinging hydraulic cylinder is connected with a lengthening part with length adjustable. A limit stop is arranged in the front of the extending end of the lengthening part and fixedly connected to the limiting supporting frame. The invention further discloses a hydraulic motor starting performance testing method. The hydraulic motor starting performance testing device is simple in system structure, convenient to operate, low in manufacturing cost and capable of being popularized and used.

The invention provides an end-to-end flow reconfiguration method in a time-varying dynamic network. The end-to-end flow reconfiguration method comprises the following steps of: step 1, carrying out end-to-end flow wavelet transform; step 2, extracting time-frequency domain characteristic parameters of an end-to-end flow; step 3, reconfiguring the end-to-end flow; and step 4, correcting a reconfiguration value of the end-to-end flow. The end-to-end flow is reconfigured by using a multi-fractal wavelet model; a link load is used as a restrain parameter; the end-to-end flow is accurately reconfigured through multi-resolution ratio analysis; and the ill-conditioned problem of the end-to-end flow reconfiguration is solved from a perspective of time-frequency domain combined analysis by both considering self-similarity property and multi-fractal property of the end-to-end flow, so that the end-to-end flow is more accurately reconfigured. The end-to-end flow reconfigured by using the method provided by the invention is used for carrying out activities in network management, such as network planning, load balance, fault diagnosis, route optimization and the like.

The invention relates to an approximate-matching-based publication / subscription load balancing method, which comprises the following steps that: users transmit subscription requirements to border broker nodes, and the border broker nodes forward the subscription requirements to an internal broker node connected with the border broker nodes; after receiving an event, a certain border broker node judges whether the event meets the subscription requirements of local users or not, transmits the event to all the local users whose subscription requirements are met if the event meets the subscription requirements of the local users, checks whether the event meets the subscription requirements of remote users or not, and forwards the subscription requirements through neighbor broker nodes if the event meets the subscription requirements of the remote users; and an approximate matching method is adopted for the internal broker node which is overloaded to realize controllable load balancing to transfer matching tasks from the overloaded internal broker node onto under-loaded border broker nodes. The load balancing of the conventional publication / subscription system is effectively realized, and the method has the advantages of high processing efficiency and stable performance.

The invention relates to a metal single atom loaded carbon-nitrogen polymer catalyst and a preparation method thereof. The preparation method comprises the following steps: mixing a carbon-nitrogen polymer with water, and carrying out hydrothermal treatment at 150-200 DEG C for 10-15 hours to obtain a hydroxyl-containing carbon-nitrogen polymer; mixing a hydroxyl-containing carbon-nitrogen polymerwith water, carrying out ultrasonic treatment, adding a metal source solution, performing stirring for 8-24 hours in a dark place, performing separating, drying, and calcining to obtain the metal monatomic supported carbon-nitrogen polymer catalyst. The preparation method of the metal single atom loaded carbon-nitrogen polymer is simple, high in universality and accurate and controllable in single atom position loading position, and the prepared metal single atom loaded carbon-nitrogen polymer catalyst is high in loading capacity, rapid in in-plane charge transmission, excellent in photocatalytic performance and high in stability.

The invention provides a domain name resolution method and device, wherein the domain name resolution method comprises: receiving a domain solution request sent by a terminal device; obtaining domain information from the domain solution request, and the IP addresses of a plurality of servers corresponding to the domain information; selecting a server having a smallest load from the plurality of servers; and sending the IP address of the server having a smallest load to the terminal device, allowing the terminal device to access the server having a smallest load. The method and device feed back the IP address of the server having a smallest load to the terminal device when the terminal device sends a domain name resolution request, thereby improving the access network speed of the terminal device, and improving user network experiences.

The invention discloses a drive assembly detection device used for a gear and rack lifting mechanism, and belongs to the field of detection devices.The drive assembly detection device comprises a bottom plate, a rack assembly, a load simulation assembly, an installation support used for installing a to-be-detected drive assembly, and a gear assembly matched with the rack assembly.The installation support is installed on the bottom plate.The rack assembly is installed at the position, corresponding to the installation support, on the bottom plate in a slidable mode.The rack assembly is meshed with the gear assembly.During test installation, the to-be-detected drive assembly is installed on the installation support.The gear assembly is arranged on an output shaft of the to-be-detected drive assembly in a sleeving mode.The load simulation assembly comprises an oil cylinder, a support and a hydraulic system.The oil cylinder is communicated with the hydraulic system.A piston rod of the oil cylinder is connected with the rack assembly.An oil cylinder base of the oil cylinder is connected with the support.The functionality of the drive assembly of the gear and rack lifting mechanism can be detected.

The invention discloses a supported catalyst for diphenyl carbonate synthesis by reaction of phenylacetate and dimethyl carbonate and a preparation method thereof. The active components of the catalyst are molybdenum oxide and vanadium oxide, wherein the carrier of the catalyst is a molecular sieve, the charge capacity of the carrier is between 12.5 and 75 percent, and the ratio scope of the amounts of the molybdenum oxide and the vanadium oxide is (2.6:1)-(17:1). The catalyst has the characteristics of high catalytic activity, high selectivity, long service life and the like, and has high industrial application value.

The invention belongs to the technical field of heat exchange equipment, and particularly relates to a control method of an air conditioning system. The method aims at solving the problem that a way of determining an indoor temperature regulating demand by existing air conditioning equipment is inaccurate and thus, the initial opening degree of an electronic expansion value determined is not matched with an actual operating requirement of air conditioning equipment. In order to achieve the purpose, according to the control method of the air conditioning system, the room can be divided into the multiple areas, a room load is calculated based on the initial environment temperatures of the multiple areas, the load size of each area in the room is refined, and the room load value corresponding to the whole room is accurately calculated; the difference between the current temperature condition and the expected temperature condition of the room can be accurately determined on the basis of the difference between the room load value and the preset load value, and the determination accuracy of the temperature regulation requirement in the room is improved, so that the actual operation requirement of the air conditioning system can be more accurately obtained, and the initial opening degree of the electronic expansion valve is better matched with the actual operation requirement of the air conditioning system.

The invention relates to an LTE cell load evaluation method, especially to an FAHP- integrated learning based LTE cell load evaluation method. The method includes the following steps: (1) obtaining LTE cell original performance indexes, and calculating key performance indexes; (2) constructing an LTE cell load evaluation index system; (3) determining LTE cell load evaluation standards; (4) determining index weights of large, medium and small service cells by using a analytic hierarchy process; (5) determining evaluation classifications of learning samples by using a fuzzy comprehensive evaluation method and Kmeans clustering; and (6) generating an automatic evaluation model by using an integrated learning method. According to the method, the LTE cell load is automatically evaluated by using the integrated learning model, the accuracy is improved compared with that of a conventional machine learning algorithm, mobile operator network optimization departments can be guided to effectivelymonitor the LTE call load, and so labor and time costs are greatly reduced.

A honing processing technology for making uniform the load applied to honing grindstones by cooperating the reciprocal motion of the honing grindstones with the feeding and expanding motion at high precision by a specified relation. Servo motors are used as drive sources respectively for spindle reciprocal drive part and grindstone depth cutting part, and these two servo motors are mutually cooperated, and the feeding and expanding motion of the honing grindstones is controlled to be synchronized and tuned with the ascending and descending (reciprocal) motion of the honing tool so that the processing load applied to the honing grindstones may be averaged. Hence, without modifying the basis existing mechanical elements, the load applied to the honing grindstones may be averaged, and the honing process may be stabilized in precision and enhanced in precision.

The invention provides a scheduling method, device and system based on server resource consumption prediction. The method comprises the following steps of acquiring current resource information from each server; determining to-be-consumed resource information of the corresponding server according to running state information of a borne process; obtaining a predicted load of each server according to the current resource information and the to-be-consumed resource information of each server; and adopting a load balancing mode to schedule each server based on the predicted load of each server. Due to the fact that future consumable resources can be predicted, the servers can be scheduled according to the current and predicted loads of each server, and the technical problem that the schedulingloads are not completely balanced in the prior art is solved.

The invention provides a truck weighing system capable of being used in a movement state and a static state. The system is composed of a weighing terminal and four detection nodes, the detection nodes obtain the carrying capacity through an arrangement mechanism, the arrangement mechanism is composed of a left ferrule, a right ferrule, a metal plate and a strain sheet, the strain sheet is fixed on the metal plate, and the metal plate is connected with the right ferrule through a pull rod and a spring. A weighing method includes the following steps that 1, a coordinate system is established; 2, loads of the detection nodes are obtained; 3, the vehicle state is judged; 4, the acceleration of gravity is obtained; 5, an error vector is obtained through calculation; 6, the output angular velocity is corrected; 7, data updating is conducted on a quaternion differential equation; 8, the dip angle and other parameters of a truck are obtained; 9, the carrying capacity of the truck is calculated. According to the truck weighing system and method capable of being used in the movement state and the static state, accurate measurement of the carrying capacity is achieved, damage of a truck plate spring is avoided, the dip angle of the truck is used for obtaining the actual load of the truck, and the defect that in the past, the carrying capacity of a vehicle can not be accurately measured when the vehicle is in the movement state is overcome.

The invention relates to an intelligent photovoltaic energy storage scheduling analysis method and device, a server and a storage medium. The method comprises the steps: respectively installing monitoring equipment at monitoring points of a plurality of energy storage batteries forming a photovoltaic power station, and collecting the load fluctuation data of all energy storage batteries in real time through the detection equipment, through real-time monitoring of load fluctuation data of the energy storage batteries, achieving real-time dynamic scheduling control of each energy storage battery. The utilization rate of electric energy resources of the energy storage batteries is effectively improved, and optimal scheduling of each energy storage battery is realized. The situation that the load shows the load sudden change trend, the sudden change of the load needs to be collected and detected, and the sudden change of the load is integrally judged according to the collected data is emphatically considered, so that more accurate and efficient scheduling of the energy storage battery during the sudden change of the load is realized; therefore, the load of the energy storage battery with sudden load change is effectively improved, the service lifetime of the energy storage battery is prolonged, and the use safety of photovoltaic power generation equipment is improved.

The invention discloses a robot servo motor performance tester, and relates to the technical field of servo motor performance test. A measured motor is included, and provided with a rotating shaft, the measured motor is provided with a load motor in the side close to a rotating shaft, a torque and rotating speed sensor is arranged between the load motor and the measured motor, a first driver is arranged in one side of the load motor, a second driver is arranged in one side of the measured motor, a host computer is arranged between the first and second drivers, and first and second measurement-control instruments are arranged between the host computer and the torque and rotating speed sensor. Parameters of the measured servo motor and the load server motor can be collected and processed inone time, the test workload is reduced, and the parameters can be displayed and recorded by atlas and concrete numbers; and related parameters are collected by the measurement-control instruments anddrivers during test, and concentrated in the host computer for processing, test time is reduced, and the error rate is lower.

The invention relates to an operating mechanism load simulation device and an operating mechanism delivery test method. The operating mechanism load simulation device comprises a rack, a magneto-rheological damper fixed relative to the rack, and a control device connected with the magneto-rheological damper. The rack is used for fixing an operating mechanism to be tested, the magneto-rheological damper is used for being in transmission connection with the operating mechanism to be tested so as to simulate the load of the operating mechanism, and the control device is used for controlling the magnitude of current introduced into the magneto-rheological damper so as to simulate the switching-on and switching-off resistance of a circuit breaker connected with the operating mechanism to be tested. The operating mechanism delivery test method comprises the steps that the magneto-rheological damper is in transmission connection with the operating mechanism to be tested, and when the operating mechanism starts to be switched on and off, the magneto-rheological damper is powered on, and the magnitude of damping force generated by the magneto-rheological damper is changed by changing the magnitude of the introduced current in real time so as to simulate the load of the operating mechanism. The operating mechanism load simulation device can accurately simulate the load of the operating mechanism.

The invention provides a switching method, a base station and a terminal and belongs to the technical field of wireless communications. The switching method applied to a first base station comprises:a switching request sent by a second base station is received, wherein the switching request carries information of at least two beams of the first base station; layer 2 measurement is carried out onthe at least two beams to obtain a measurement result, and the measurement result comprises at least one of the following: beam granularity physical resource block PRB utilization rate distribution, the PRB utilization rate of a single data type of beam granularity and the total PRB utilization rate of the beam granularity; a switching response is sent to the second base station according to the measurement result, so that the second base station determines a target beam accessed by the terminal from the at least two beams according to the switching response. By means of the mode, the load ofthe obtained wave beam is accurate, the optimal wave beam can be selected for the terminal, and therefore the wave beam can provide enough service guarantee for the terminal.

The invention discloses a back-off mode design method for a data link random access protocol. The method comprises a channel load statistics module, a channel state judgment module, a binary backoff algorithm module and a priority-based backoff algorithm module. The channel load statistics module is used for calculating a channel load value by counting the number of data link pulse signals in a channel, the channel state judgment module is used for judging the current data link channel state, and the binary backoff algorithm module is used for executing a binary backoff algorithm for backoff.The priority-based backoff algorithm module is used for executing a priority-based backoff algorithm to carry out back-off. According to the technical scheme disclosed by the invention, the data linknetwork performance during channel congestion is improved, and the real-time performance of high-priority data link information sending is ensured.

The invention provides a non-contact power supply device capable of providing power in a non-contact manner and high in transmission efficiency, wherein the sending-side impedance is accurately adjusted by an impedance adjustment part (56) to be equal to both the load impedance of a lifting circuit used for driving the nozzle support part (43) of a currently installed element pickup head (32) to move up and down, and the load impedance of an electro-spinner with an R-axis servo motor (47) and used for driving the nozzle support part (43) to rotate. In this way, the transmission efficiency of the non-contact power supply for the element pickup head (32) is improved. In addition, since no impedance measuring circuit is adopted, the non-contact power supply device is low in cost and small in size.

The present invention provides a LED driving power supply flow measurement circuit and method. The flow measurement circuit comprises a current-limiting resistor, a flow measurement resistor, a comparator, a logic circuit, a driving circuit and a load. The flow measurement circuit also comprises a control circuit and a configuration resistor. One end of the current-limiting resistor and one end of the flow measurement resistor are connected with an input power supply, the other end of the current-limiting resistor is connected with one input end of the comparator and the fourth input end of the control circuit, the other end of the flow measurement resistor is connected with the other end of the comparator and the output end of the load, the output end of the comparator is connected with the input end of the control circuit through the logic circuit, the input end of the load is connected with the output end of the driving circuit, the first input end of the control circuit inputs control voltage signals, the third input end of the control circuit is connected with one end of the configuration resistor, and the output end of the control circuit is connected with the input end of the driving circuit. The flow measurement circuit can realize the accurate flow measurement feedback function, and is applied to different load applications so as to improve the universality of the flow measurement circuit and reduce the cost.

The invention discloses a cable-stayed bridge cable bent tower anchoring area prestressed reinforcement impact protection test device and method, and belongs to the technical field of cable-stayed bridge impact protection tests. The cable-stayed bridge cable bent tower anchoring area prestressed reinforcement impact protection test device comprises a loading device, a concrete model, tensioning mechanisms, a tensioning pedestal, a high-speed camera and an acquisition instrument; the tensioning pedestal is distributed on the side wall of a concrete model in a semi encircling form; the pluralityof tensioning mechanisms and the loading device are installed on the tensioning pedestal; extension lines of the multiple tensioning mechanisms are distributed vertically and horizontally and connected with the concrete model; the high-speed camera is arranged obliquely above the concrete model; and the high-speed camera, the tensioning mechanisms and the loading device are all electrically connected with the acquisition instrument. From the five aspects of protection effect, durability, construction difficulty, economic cost and structural appearance change degree, schemes of protection types are comprehensively compared with each other and selected, protection type selection of prestressed tendons is realized, and bridge engineering design accuracy and construction safety are ensured.

The invention discloses a method for preparing a medium-low temperature SCR denitration catalyst and the catalyst prepared by the method. The preparation method comprises the following steps: impregnating a catalyst base material into an introduced component impregnation liquid having a series concentration, heating the impregnated sample to detect the content of a target component, and drawing a relation curve of the concentration of the impregnation liquid and the content of the corresponding component; calculating the concentration of the impregnation liquid at the required content of the target component according to the relation curve; then, treating the base material by an impregnation method the same as that in the impregnation curve drawing stage; and finally, heating the catalyst to obtain a finished product. The method can be used for solving the conflict problem between the introduced component and the catalyst formula, treating a catalyst module, modifying an inactivated traditional catalyst into a medium-low temperature catalyst in a regenerating process, and is easy to operate and simple in equipment. The prepared catalyst has a good denitration activity at 250-420 DEG C, and has a SO2 oxidation rate less than 1 percent at high temperature. The method and the catalyst have a relatively high industrial application level.