30results about How to "Achieve versatility" patented technology

The invention discloses an image uploading method which is applied to an image uploading system. The image uploading system comprises a server and at least one client. The method includes the following steps that S1, the clients upload images to the server by sending HTTP messages; S2, the server processes the images uploaded by the clients according to a preset image processing strategy and a limiting condition; S3, the server stores the processed images to an appointed directory. The invention further discloses the image uploading system and the corresponding server. By means of the image uploading method and system and the corresponding server, compatibility among mobile terminals of different systems and different types of browsers on the mobile terminals can be achieved, functional universality is fully considered, the user experience is improved, information sharing and interaction among users are achieved conveniently, the user number and the page view of application software and a website are increased, and the competition of similar products is improved.

The invention discloses a welding positioning tool for rotary shaft fixing plates of pneumatic sliding bin gates. The welding positioning tool comprises a fixing rod, an adjusting rod, a clamping device assembly and two positioning devices. The adjusting rod is connected to one end of the fixing rod, the clamping device assembly is disposed on the fixing rod and used for fixing a positioning tool on a middle beam of an automobile body framework, and the two positioning devices are respectively disposed on the adjusting rod and the outer end of the fixing rod and used for fixedly attaching a rotary shaft fixing plate on a vertical surface of a sheet beam of the automobile body framework. The welding positioning tool is simple in structure and convenient in use, and is applicable to welding rotary shaft positioning plates on automobile body frameworks with different structures, positioning precision during welding of the rotary shaft positioning plate is guaranteed, and production efficiency is improved.

The invention discloses a multifunctional device used for assembling and testing a driven-by-wire headset and belongs to the technical field of an electronic products assembling and testing device. The multifunctional device used for assembling and testing the driven-by-wire headset comprises a manipulation platform. A driven-by-wire placing area and a fair line groove are formed in the upper surface of the manipulation platform, and installation of a driven-by-wire component can be completed through the manipulation platform. Meanwhile, touch holes are formed in the driven-by-wire placing area, the touch holes correspond to top poles, and each top hole is provided with a touch end and a manipulation end. A primary base is arranged on the manipulation platform, the primary base is connected with a circuit board, and the circuit board is provided with a test probe connecting terminal. When a headset plug is inserted into the primary base, the manipulation end contacts the touch points of the driven-by-wire component by pressing the manipulation end of the pressing top poles, then signals are transmitted to an outside testing device through the testing probe connecting terminal of the circuit board, and testing of the driven-by-wire component is completed. The multifunctional device used for assembling and testing a driven-by-wire headset can achieve installation and test of a driven-by-wire component, achieve utility of tools in different stations and greatly improve production efficiency.

The invention relates to a universal automobile gauge signal converter and an automobile gauge signal conversion method. The converter acquires and calculates the rotating speed and the vehicle speed pulse of a transformed engine, and calculates and outputs the rotating speed pulse and the vehicle speed pulse that are matched with an original automobile gauge, so that the original automobile gauge can continue to accurately display the information of the rotating speed and the vehicle speed of the engine in real time. The converter comprises an MCU (microprogrammed control unit) internally provided with a data FLASH, a pulse acquisition circuit with adjustable filter frequency, a pulse output circuit and a communication serial port, wherein the pulse acquisition circuit with the adjustable filter frequency respectively acquires a rotating speed pulse signal of an engine rotating speed sensor and a vehicle speed pulse signal of a vehicle speed sensor, the MCU processes the signals and outputs the rotating speed pulse signal and the vehicle speed pulse signal through a pulse output circuit to a rotating speed gauge and a vehicle speed gauge of an instrument panel, meanwhile, the MCU further communicates with a PC machine through the communication serial port, wherein the pulse acquisition circuit is internally provided with an RC (remote control) low-pass filter circuit, and the RC low-pass filter circuit adopts a digital potentiometer with a fixed capacitance and an adjustable resistance.

The invention provides a multifunctional insulated holding pole allowing live replacement of a high-voltage drop-out fuse. The multifunctional insulated holding pole comprises an insulating rod and awire locker. The insulating rod comprises an upper rod and a lower rod. The upper rod and the lower rod are connected by a connecting member. The connecting member comprises a clamping member for fixing the insulating rod on a cross arm, an elastic member for realizing the elastic operation of the clamping member, and a limiting member for preventing the upper rod and the lower rod from being detached when the clamping member is loosened. The insulating rod further includes a foreign matter removing fire-spraying device used in the replacement of the wire locker. The foreign matter removing fire-spraying device includes a base, a control unit disposed in the base, an ignition mechanism and a spraying mechanism. The base is an aluminum alloy base. The base is provided with a mounting hole therein. The mounting hole is a threaded hole. The upper end of the upper rod or the lower end of the lower rod is provided with an external thread. The foreign matter removing fire-spraying device isfixed to the upper end of the upper rod or the lower end of the lower rod by the cooperation of the external thread and the threaded hole. The upper and lower rods are telescopically arranged to adjust the length of the insulating rod, thereby realizing the versatility of the insulated holding pole.

The invention provides an evolvable digital circuit and an evolution method thereof. The evolvable digital circuit comprises an evolvable combinational circuit, a boundary scanning module used as an interface, and a connecting unit. The output end of the evolvable combinational circuit is connected with the input end of a state register, and the connecting unit is a multiplex selector. One path of the multiplex selector is connected with the boundary scanning module and the other path is connected with the output end of the state register. When the path connected with the boundary scanning module is gated, an excitation vector applied by the boundary scanning module is input into the evolvable combinational circuit. When the path connected with the state register is gated, the output of the state register is fed back to the evolvable combinational circuit. The evolvable digital circuit is provided with a universal test interface to improve the universality of the evolvable digital circuit, and is further compatible with a sequence circuit and a combinational circuit.

The invention discloses a flight data publishing system, which comprises a flight operation management subsystem, a message service subsystem, an authentication and authorization subsystem, a serviceregistration center subsystem and a service gateway subsystem, wherein the flight operation management subsystem is responsible for flight data management and comprises a message routing module and aWebservice module, and the message routing module transmits the flight data to the message service subsystem; the message service subsystem comprises a plurality of message topics, the flight data arestored in a classification sequence, and each message topic publishes the stored flight data to each downstream system. According to the present invention, the active and passive high-timeliness, data consistency, stability and reliability data services are provided for flight data publish, so that a downstream system receiving end can efficiently, simply and backtrack messages.

The multifunctional TV set includes video channel, audio channel, signal processor, stream media controller (SMC), and digital printer connected to SMC. Being connected to the video channel, the audio channel, SMC in use for processing multifunctional digital data stream includes internal bus, controller connected to internal bus, USB interface, USB-OTG interface, audio/video decoder. Through the internal bus, the controller reads audio/video digital signals from USB interface, or USB-OTG interface; and decoded audio/video digital signals by audio/video decoder passing through are output through video channel and / or audio channel. Digital printer connected to USB-OTG interface can print out decoded audio/video digital signals. The invention discloses multifunctional TV set with printing function and better expandable capability.

The invention provides an unmanned aerial vehicle universal lithium battery pack full-life management device and a battery management method thereof. The management device comprises a battery jar andan unmanned aerial vehicle battery management module, wherein the battery jar is detachably mounted on the unmanned aerial vehicle battery management module; and the battery jar is internally equippedwith a lithium battery pack formed by a plurality of single lithium batteries arranged in a buckling manner. The lithium battery pack is connected with the positive electrode and the negative electrode of the battery jar through a control switch, and series-parallel connection of the single lithium batteries is achieved, so that the problems of poor compatibility of existing unmanned aerial vehicle batteries and integration of the battery management module and the battery are solved, and independent disassembly, replacement and assembly of the batteries and the management modules can be achieved; battery parameters are preset through a communication interface, so that the universality of the management module is improved; through arrangement of a storage chip and a clock chip, recordingand storage of state information of each battery in a full life circle are realized; and the SOC and SOH states of the battery can be well predicted, and the working reliability of the batteries during flight is improved.

The invention provides a stepping type automatic discharging device for packing fine dried noodles. The stepping type automatic discharging device for packing the fine dried noodles is characterized in that a left baffle and a right baffle are adjusted to needed packing specifications through a left sliding block and a right sliding block, and an air cylinder is controlled through a program to push a left bottom plate and a right bottom plate to designated spots. After the fine dried noodles of a small specification in an independent packing bag fall into the device, the air cylinder is controlled by the program to conduct automatic segmented discharging; after a set value is reached, the discharged fine dried noodles are pushed away by a pushing mechanism, and thus a discharging process is completed. The stepping type automatic discharging device is simple in structure, universality of existing equipment is achieved, equipment investment is lowered, production cost is saved, and production efficiency is greatly improved.

The invention relates to the field of building technology, and discloses a new type of steel bar bending device for building, which includes a control box, an engine is fixedly installed on the left side of the inner bottom wall of the control box, and the output shaft of the engine is fixedly connected with a first A pulley, a bearing is fixedly installed on the right side of the inner bottom wall of the control box, a rotating shaft is arranged inside the bearing, and a second pulley is fixedly installed on the end of the rotating shaft away from the bearing. The new type of building steel bar bending device inserts the steel bar into the first through hole and the second through hole, adjusts and fixes the steel bar with a threaded rod, drives the bracket to rotate in the chute through the engine, and drives the steel bar to follow the first through hole. The fixed plate moves towards the bending piece, so that the bending piece bends the steel bar. By using the engine, the angle of the bent steel bar can be adjusted, and multiple through holes can be put into the steel bar, which ensures the quality of the steel bar bending, thus achieving the goal of saving time and effort. Effect.

The invention relates to the technical field of decoration, and discloses a wall face smoothing device for decoration. The device comprises a machine body, a handheld main pipe and millstone fixed tothe handheld main pipe, the handheld main pipe is connected to the machine body, a lifting fixed base is arranged in the machine body, an abut-joint device is arranged in the fixed base, and comprisesan abut-joint block and a connecting spring, the connecting spring is connected to the fixed base, the abut-joint block is connected with the connecting spring, an opening is formed in one side of the fixed base, and the abut-joint block penetrates out of the opening and is in abut joint with the handheld main pipe. The device has the advantages that the fixed base lifts in the vertical directionto adjust the height of the abut-joint block, the abut-joint block is in abut joint to the side wall of the handheld main pipe under elastic extrusion of the connecting spring, millstone on the different heights can be stably in abut joint to the wall, the problem that when the high wall is ground, due to the fact that the hand cannot reach the high position, the millstone cannot be stably in abut joint to the wall is solved, and the uniform grinding of the wall on the different heights can be achieved.

The invention relates to a smart handle and a rowing machine. The smart handle includes a communication module, a sensor assembly and a control module. The sensor assembly is used for collecting tension information and motion information of a smart handle body and physiological information of a user; an input side of the control module is connected to the sensor assembly, an output side of the control module is connected to the communication module, and the tension information, the motion information and the physiological information of the user which are received from the sensor assembly aretransmitted through the communication module. According to the smart handle of the embodiment, the use experience of the user can be optimized.

The invention discloses a baseband signal processing device and vehicle-mounted empty opening monitoring equipment. The processing device comprises a baseband signal processing circuit which comprises a programmable array unit, a digital signal processing unit and a CPU unit. The programmable array unit is used for carrying out frequency conversion processing on radio-frequency signals to obtain synchronization timing signals. The digital signal processing unit is connected with the programmable array unit and is used for carrying out baseband protocol analysis on the synchronization timing signals to obtain initial baseband signals. The CPU unit is connected with the digital signal processing unit and is used for carrying out signal analysis distributing on the initial baseband signals to obtain target baseband signals. The universality of the baseband signal processing device is achieved, and the technical problem that in the prior art, a baseband signal processing device has no universality and cannot be compatible with other equipment is solved.

The invention discloses a non-polar port circuit, which is used for being connected with an external port including a positive terminal and a negative terminal. The non-polar port circuit comprises an internal port, an internal circuit module, a dual-path complementary single-pole double-throw switch and a switch control module; when the wireless port circuit is connected with the external port, a first terminal of the internal port electrically contacts one of the positive terminal and the negative terminal of the external port; a second terminal of the internal port electrically contacts with the other one of the positive terminal and the negative terminal of the external port; the internal circuit module is connected with the internal port through a first line and a second line; the dual-path complementary single-pole double-throw switch is used for achieving automatic line switching according to a control signal; the switch control module is used for generating the control signal according to detection signals of the first terminal and the second terminal of the internal port; the first line is connected to the positive terminal of the external port; and the second line is connected to the negative terminal of the external port, so that the internal circuit module obtains power supply voltage when the internal port is connected with the external port.

The invention discloses a system setting method and device for an intelligent alarm information management terminal and a medium, and the method comprises the steps: judging that an alarm parameter setting instruction comprises alarm information, and carrying out the alarm type setting according to the type of the alarm information; if it is judged that the alarm parameter setting instruction contains defence area information, carrying out defence area alarm setting according to different defence area information; and if it is judged that the alarm parameter setting instruction contains alarm host information, carrying out host selection setting according to the alarm host information. The system setting method and device have the technical effects that through alarm type setting, defense area alarm setting and host selection setting, the multifunctionality of the intelligent alarm information management terminal system setting is realized, meanwhile, the use requirements of a user on the system setting are met, the operation is simpler, the misoperation of configuration interface use is effectively avoided, and the occurrence of a system abnormal phenomenon caused by misoperation of a user is effectively avoided.

The invention discloses a drilling device for machining chemical accessories. The drilling device comprises a supporting transverse plate, a second rotating shaft and a telescopic buckle, wherein a first electric push rod is arranged on one side of the supporting transverse plate, the output end of the first electric push rod is provided with a first clamping plate, the side, far away from the first electric push rod, of the first clamping plate is uniformly provided with damping springs, the side, far away from the first electric push rod, of the supporting transverse plate is provided with athird electric push rod, and the side, far away from the third electric push rod, of the second clamping plate is uniformly provided with the damping springs. The first electric push rod is arrangedon one side of the supporting transverse plate, and the output end of the first electric push rod is provided with a first clamping plate, the side, far away from the first electric push rod, of the first clamping plate is uniformly provided with the damping springs, so that the tightening of the mold can be realized by the device, the mold is tightened while the mold is used, the damping can alsobe performed, and the phenomenon that the shocking is too strong when drilling the mold, the mold is damaged can be prevented.

The invention discloses an infrared imaging electric power facility fault detector and a detection method thereof; the infrared imaging electric power facility fault detector comprises an outer shelland a detection shell; the upper surface of the outer shell is hinged with a connecting shaft, the outer surface of the connecting shaft is fixedly connected with an electronic display screen, and thefront surface of the electronic display screen is fixedly connected with an infrared camera; and a through groove is formed in the front surface of the outer shell, and a pin shaft is hinged to the rear surface of the outer shell. Six built-in detachable and rechargeable detection shells are used for directionally installing a circuit pipeline to be detected, an aluminum sheet, a heat sensor anda thermistor are used for automatically adjusting an electric heating pipe, the heat distribution condition of the whole circuit pipeline is automatically adapted, the heat radiation distribution of the pipeline is visually recognized, and the normal condition of the pipeline can be intuitively judged; and the detection shell can adapt to circuit pipelines with different sizes and different modelsthrough the cooperation of calipers and springs, so that the requirements of universality and wide applicability are met.

The invention discloses a dental bent handpiece with an adjustable handpiece angle, which is characterized by comprising a handpiece assembly provided with a machine needle; the handpiece assembly is rotatably connected with the handle assembly in an included angle adjustable manner, and the handpiece assembly can be fixed at a preset position relative to the handle assembly; and the driving assembly is used for driving the machine needle to rotate. The machine head assembly is rotatably connected with the handle assembly, so that the angle of the machine head can be quickly switched according to front and rear teeth in the actual treatment process, and the treatment efficiency and the operation convenience of a doctor are improved; in addition, adaptation to different angles can be achieved through one dental bending machine, universality is achieved, and the production cost of dentist instruments is reduced.

The invention relates to a rapid adaptation method and system for an electric vehicle controller protocol, and the system comprises a controller, an instrument and a terminal, and the rapid adaptation method comprises the steps: enabling the instrument to recognize whether the received controller data is integrated services digital network data, and transmitting the recognized integrated services digital network data to the terminal; the terminal determines a unique analysis program of the integrated service digital network data in the terminal according to the identified message structure of the integrated service digital network data and the vehicle information of the electric vehicle to be adapted; and the terminal matches or updates the unique analysis program with the analysis program in the remote server, and transmits the updated analysis program to the instrument. The method can quickly adapt to various integrated service digital network controllers, so that the compatibility and universality of the liquid crystal instrument to different electric vehicle factory controllers are improved, and the updating process is safe and reliable.

The present invention discloses a computing apparatus, including: at least one general computing core circuit, an internal interface circuit, an external interface circuit, a cache coherence engine circuit, and a protocol conversion circuit. The computing apparatus is coupled to an internal apparatus by using the internal interface circuit, and is coupled to an external apparatus by using the external interface circuit. When working in a first mode, the cache coherence engine circuit implements cache coherence between the computing apparatus, the internal apparatus, and the external apparatus, and in this case, the computing apparatus is used as a node controller. When working in a second mode, the cache coherence engine circuit processes only cache coherence between the apparatus and the internal apparatus, and the external interface circuit is used as a network interface circuit. The present invention further discloses a node device and a server. By means of the foregoing manner, in the present invention, different working modes of the computing apparatus can be configured, so that different types of servers may be constituted by using apparatuses of a same type, thereby implementing flexible switching between different solutions.

The invention relates to an application server infrastructure configuration method and system. The system comprises an application server infrastructure instantiation module, a configuration information acquisition module, a service class configuration module and a service object initialization module. After the application server infrastructure is loaded, a configuration file is acquired through the application server infrastructure, the application server infrastructure is configured through the configuration file, and initialization of various services of the application server infrastructure is completed, so that the condition in the prior art that the design universality and system expandability can be reached through a code instantiation object and code setting of a corresponding relationship when the application server infrastructure is subjected to object loading is avoided. Furthermore, underlying codes of the infrastructure are all in an open-source manner, and the infrastructure can be conveniently understood and maintained by developers.

The invention relates to the field of petroleum seismic exploration, in particular to a method and a device for creating an earthquake big data storage application model, seismic data is cut into three parts, namely a file header, a data channel header and a data body, the data body is cut into data blocks according to requirements, and general file information is stored in a database; the data body is stored in a disk array, and data channel header information and index information are stored in a file system; the trace header keyword and the data body of the data information are separately stored, so that the flexibility of data calculation can be better reflected, the reading and writing times of the data are reduced, the index construction efficiency is greatly improved, the universality and the cross-platform type of seismic data format application are realized, a rapid and efficient index construction model is supported, and the dimension reduction storage of mass data is realized; distributed data reading and writing can be supported, and the feedback speed of the disk array in the data reading and writing process is greatly increased; by applying the local I/O cache, the data read-write efficiency is improved.

The invention discloses a testing machine for detecting dynamic friction torque of a turret seat ring, belongs to the technical field of turret seat ring tests, and aims to solve the problems of low efficiency, low intelligent degree, high physical output and inaccurate measurement in the prior art. The testing machine comprises a base support frame; a seat ring positioning and clamping device positioned above the base support frame; a torque driving device which is arranged on the base support frame and at least comprises a rotary driving device and a torque sensor, wherein an upper ring anda lower ring of the seat ring are driven by the rotary driving device to rotate relatively; a torque sensor which is arranged on a rotary shaft of the rotary driving device to obtain a seat ring driving torque; and a loading device which comprises a T-shaped sensor mounting support and a loading body. The downward loading force is applied to the T-shaped sensor mounting support through the loadingbody, and the T-shaped sensor mounting support is pushed by a bias driving device to horizontally slide relative to a base plate.

A multifunctional liquid detecting device comprises: a detector, a waterproof wire for receiving and transmitting image data transmitted by the detector, and a display for displaying the image data transmitted by the detector, wherein the detector comprises a casing and a detector inner machine; and the detector inner machine comprises a lens assembly that is placed outside the casing and fixedlyconnected to the casing through a pleat sleeve, a swing assembly that drives the lens assembly, and a control assembly that is electrically connected to the swing assembly. The multifunctional liquiddetecting device provided by the invention realizes the rotation of the lens assembly by automatically adjusting the swinging assembly, comprehensively photographs the environmental condition of the position where the detecting device is located, and can simultaneously detect the temperature, concentration and pH value of the water quality, thereby realizing the versatility of the detecting device, and improving the detection efficiency.

The invention discloses a refrigerator door body based on modularization, and relates to the technical field of refrigerators. The refrigerator door body comprises a door shell and a door lining whichare arranged side by side. An upper decorative strip and a lower decorative strip are arranged between the door shell and the door lining. The upper decoration strip and the lower decoration strip are arranged at the upper end and the lower end of the door shell correspondingly. A containing cavity used for being filled with foaming materials is formed among the door shell, the door lining, the upper decoration strip and the lower decoration strip. A pair of first connecting concave holes for mounting refrigerator door hinges is symmetrically formed in the two ends of the upper decoration strip. A handle structure is arranged on the upper decorative strip or the lower decorative strip. A pair of mounting grooves is symmetrically formed in the two ends of the lower decorative strip. Multiple second connecting concave holes for mounting the refrigerator door hinges are formed in one surfaces of the mounting grooves. According to the refrigerator door body based on modularization, on thebasis of modular design, the device is reasonable in structural design and convenient to install, the production cost is reduced, and the device has high market application value.

The invention discloses a push wheel mechanism of a spreading machine. The push wheel mechanism comprises push wheels (1), supporting seats (2), a rear push frame (3), a front balance weight (4) and a hydraulic cylinder (5), wherein the number of the push wheels is two, a rolling shaft (1.1) is arranged at each of two ends of each push wheel respectively and is fixedly connected with the supporting seats; the number of the supporting seats is four, and the four supporting seats are fixedly arranged on the rear push frame in two-two symmetry; the width of the rear push frame is equal to that of a frame cross beam (6), a traction hole is formed in the center of the front part of the rear push frame, the rear part of the rear push frame is in hinged connection with the front balance weight, and a hinging seat I (3.1) is arranged on the bottom surface of the rear push frame; the front balance weight is fixedly connected with the frame cross beam, and a hinging seat II (4.1) is arranged on the bottom surface of the front balance weight; the two ends of the hydraulic cylinder are in hinged connection with the hinging seat I and the hinging seat II respectively, and the hydraulic cylinder is connected with a hydraulic oil pump through a hydraulic pipeline and a valve bank. The push wheel mechanism of the spreading machine can relieve and absorb impact load of a material mover to the spreading machine, can adapt to the sizes of material movers of different model numbers, and can prevent a front panel of the spreading machine from being damaged.

The invention discloses a resonant column welding clamp. The resonant column welding clamp comprises a resonant column fixing device and a copper wire fixing device, wherein the resonant column fixing device and the copper wire fixing device are arranged on a base. The resonant column welding clamp is characterized in that the resonant column fixing device is used for locating resonant columns, and the locating distance of the resonant column fixing device can be adjusted; the copper wire fixing device is located on one side of the resonant column fixing device and can move in the axial direction and the radial direction of the resonant columns. According to the clamp, the resonant column fixing device adjustable in distance is used for adapting to the resonant columns of different length specifications, and the copper wire fixing device capable of being adjusted by moving horizontally or vertically is used for adjusting the position of copper wires so as to adapt to the resonant columns of different specifications. According to the clamp, the welding universality of the resonant columns of different type specifications is realized, the number of special clamps to be manufactured is reduced, and therefore the production cost is saved.

The invention provides a method and a system for drawing line locus applied in a VR scene. The method comprises: performing unified packaging on an underlying SDK of an operation device of a VR perception device; providing an input callback interface and operation information of the operation device to a business layer, the operation information including space coordinates and rotation angles; through a LineRender locus paintbrush established in a paintbrush manager of the business layer, after the operation information of the operation device is obtained, rendering the operation information to the VR scene, to generate a corresponding operation locus. Based on a Unity engine, a LineRender assembly, a particle system assembly, and a 2D picture assembly in the Unity engine are used, and cooperating with the operation device, a set of locus paintbrush assemblies under VR are formed. The method and the system provide related function support for external programs in a Unity plugin form, and can be rapidly integrated in a VR product which is developed by Unity, to provide corresponding function support.

The invention relates to the field of motor closed-loop test, in particular to a high-precision motor closed-loop test device used in the motor performance debugging stage. It includes a motor, a fixed support plate, a front locking screw, a flexible coupling, a rear locking screw, a displacement sensor, a slide rail, and a pressing plate. The high-precision motor closed-loop test tooling adopts a single support plate integrated with the displacement sensor support shell, which ensures the coaxial accuracy of the assembly. A window is opened on the side of the support shell to ensure the installation space; the double nuts are tightened to prevent the displacement sensor from rolling during high-speed rotation, ensuring the rigidity of the displacement sensor and the support shell; the chute on the support shell can ensure the installation of different types of motors , to achieve the versatility of closed-loop experimental device design.