33results about How to "Achieving Control Accuracy" patented technology

The invention provides a personalized numerical value display method for a high-precision measuring instrument. A table format personalized display area of two rows and multiple columns is set; a first row is a unit display area used for displaying an ary and a unit of a measurement result; a second row is a digital display area used for displaying a measured numeric value. After measurement datais sent to an interface, the measurement data is first stored in an underlying code in a form of an initial state. At this time, the unit of the current measurement data is determined by via a measurement mode, an ary unit of the current data is determined according to the numeric value, and the numeric value is partitioned in such a way that one data group consists of three bits; the last two arefilled into a two-dimensional array of display data and drawn on a corresponding area of a display interface. Via the method, significant digit and precision control of the measured numeric value ina personalized display area can be realized, control of digits behind a decimal point of the numerical value can be achieved, control of display of the numeric value at a left part or a right part canbe realized, users are provided with a friendly and personalized digital display mode, and usage efficiency of the users is improved.

The invention discloses a two-shaft type two-gear electric car speed changer. The two-shaft type two-gear electric car speed changer comprises a motor, an input shaft assembly, an output shaft assembly and a differential assembly which are in transmission connection sequentially. The input shaft assembly comprises an input shaft, a first-gear driving gear, a second-gear synchronizer and a second-gear driving gear; the first-gear driving gear is fixed to the input shaft, and the second-gear synchronizer and the second-gear driving gear are made into a whole and then arranged on the input shaftin a sleeving mode; the output shaft assembly comprises an output shaft, a first-gear driven gear, a first-gear synchronizer and a second-gear driven gear; the output shaft is sleeved with the first-gear driven gear; and the first-gear synchronizer and the second-gear driven gear are both fixed to the output shaft. The invention further discloses an electric car comprising the two-shaft type two-gear electric car speed changer. The problems that an existing electric car is not provided with a speed changer or only provided with a single-gear speed changer, and has certain limitations on powerperformance, economical performance, climbing gradient and acceleration performance are solved.

The invention relates to an electric control method of a rheological testing device. A programmable computer controller is used as a controller. The method uses a digital intelligent servo system control the motion speed of a piston rod and a parametric control algorithm to collocate the speed ring parameter of the servo system at different operation speed sections of the piston rod. A temperature sensor and a special conversion module are used for detecting barrel temperature and transforming signals. Control programs including intelligent temperature control, digital intelligent servo and the like are defined with different circulating periods and stored in a user memory of the programmable computer controller according to task grades, so as to control and adjust the temperature of a barrel and the motion speed of the piston rod. The invention realizes the speed regulation ratios index of 1:20000 of the piston rod, obtains good dynamic and static indexes and integrates the precise detection technology and intelligent control algorithm, thereby realizing the control precision of plus or minus 0.1 DEG C of the temperatures of three sections of the barrel and realizing the cooperative control of a complex control object of the multifunctional rheological testing device.

The invention provides an omnidirectional wheel device, a robot and a control method of the device. The omnidirectional wheel device comprises a main shaft, a center wheel, multiple sub-wheels, sub-wheel fixing plates and conductive components. The center wheel and the sub-wheel fixing plates sleeve the main shaft and can rotate around the main shaft, and the center wheel is located between the two sub-wheel fixing plates; the sub-wheels are arranged on the outer circumference surface of the center wheel and connected between the two sub-wheel fixing plates; the conductive components are further arranged at the ends of the main shaft and located at the sides, away from the center wheel, of the sub-wheel fixing plates, and braking components are arranged at the sides, close to the conductive components, of the sub-wheels and coupled to the conductive components; the conductive components are configured to send control signals to the braking components of the designated sub-wheels; the braking components are configured to brake the sub-wheels which the braking components belong to when receiving the control signals sent by the conductive components. According to the omnidirectional wheel device, the corresponding sub-wheels are controlled to stop rotating by the braking components, and accordingly the precision of braking the sub-wheels is controlled.

The invention provides a network access system for a submerged arc furnace gas pipe network and a control method of the network access system. The submerged arc furnace gas pipe network comprises a gas main network and a plurality of gas branch pipes connected thereto; the network access system comprises a gas return bypass pipe, a release bypass pipe, a branch pipe cut-off valve, a return bypasscut-off valve, a release bypass cut-off valve, a flow totalizer, a pressure transmitter, and an oxygen content online analyzer that are installed on each gas branch pipe. The cut-off valves are arranged before a branch line enters a network, gas bypasses are arranged between the cut-off valves and oxygen content measurement points to ensure that gas can return through the bypasses after a branch line remote control valve is cut off and ensure that the gas in the branch pipes is always in a state of flow update, and gas parameter indexes can be monitored accurately in a real-time manner beforethe gas is fed into the network to ensure that the network access gas transporting operation is performed after network access conditions are met and ensure that the quality of the network access gasmeets the requirements for methanol production; and the quantity of the network access gas is accurately metered for economic calculation.

The invention provides a manipulator design method for installing a mill lining. A rolling pendulum device, a gripping device, other accessories and a first cylinder, a second cylinder, a third cylinder, a forth cylinder and a swinging cylinder fit to the accessories are designed in the manipulator, wherein the first cylinder has the rolling joint action in the rolling pendulum device, and the second cylinder has the joint action of back-and-forth movement; the third cylinder has the pitch joint action, and the forth cylinder has the gripping joint action in the gripping device; the swinging cylinder has the joint action of up-and-down swing; multiple displacements of the manipulator in space are achieved through these different joint actions, and the high-load drive of the manipulator is achieved through arranging these cylinders; the structure size of the manipulator is reduced. In the invention, the degree of mechanization and automation in the replacement of the mill lining is greatly improved, and the labor intensity is reduced; the replacement time of the lining is shortened, and potential safety hazards in manual operation are avoided.

The invention discloses a secondary reheating unit reheating steam temperature control method. The secondary reheating unit reheating steam temperature control method comprises a flue gas recirculation fan variable-frequency control method and a flue gas adjusting baffle opening degree control method; and a leading differential feedforward unit for the reheating steam temperature after water spraying and a feedforward unit for load changing are arranged in each control method, and meanwhile an overriding and locking control unit for special circumstances is arranged in each control circuit. According to the secondary reheating unit reheating steam temperature control method, the problems that the primary reheating steam temperature and the secondary reheating steam temperature of an ultra-supercritical secondary reheating unit intercouple with each other and are low in adjusting speed are solved, the total heat absorption capacity of a primary reheater and a secondary reheater is controlled through flue gas recirculation fan variable-frequency controllers separately, the primary reheating steam temperature and the secondary reheating steam temperature are controlled through reheater flue gas adjusting baffles, the control measures such as feedforward, overriding and locking are taken, the control precision and the response speed of the primary reheating steam temperature and the secondary reheating steam temperature of the ultra-supercritical secondary reheating unit are achieved, and meanwhile safe and stable running of the unit is guaranteed.

The invention relates to a lithium battery / battery pack measuring and protecting method based on a current subsection detecting technique, which realizes intelligent controls of electric quantity detection for batteries, charge and discharge control, overcurrent / overvoltage protection, short circuit protection, and the like, and adopts a micro-control unit (MCU) mode to realize precision measuring control and intelligent management. The MCU transmits battery sampling voltage and current data to an analog-to-digital converter (ADC) to carry out quantitative analysis; the quantitative data and optimization data prestored in the MCU are compared; and the minimus information is fed back to a switch controlled by an analog front end (AFE) module to precisely control parameters of charge and discharge current, voltage, and the like. The detection mode of the MCU for the charge and discharge current of the batteries adopts the subsection detecting technique, wherein the charge and discharge current of the batteries are converted into digital signals by a voltage-mode converting circuit and a current-mode comparator, and the digital signals are sent to a central processing unit (CPU) in the MCU to carry out analysis and battery control. The invention improves the measuring precision, reduces the cost of design and production of chips and reduces the power consumption of the chips.

A milling clamp for telescope lens barrels comprises a clamp body, a positioning device and a clamping device. The clamp body is formed by a bottom plate, a left side plate, a right side plate, a cover plate, a front side top plate and a rear side top plate in an enclosed mode. The center of the left side plate and the center of the right side plate are each provided with a hole. The positioning device comprises large end positioning device bodies and small end positioning device bodies which are arranged on the two telescope lens barrels symmetrically. A first part of the clamping device comprises inverted-Y-shaped supports symmetrically arranged in the middles of the front side and the rear side of the bottom plate, long threaded rods located at the inner sides of the inverted-Y-shaped supports and pressing blocks which are pressed on the inverted-Y-shaped supports, and the inner end and the outer end of each pressing block are installed on the corresponding long threaded rods in a sleeving mode. A second part of the clamping device comprises a main rod, an adjusting threaded rod, middle pressing blocks and a main adjusting nut, wherein the main rod is vertically installed in the center of the bottom plate, and the top of the main rod is provided with an inner threaded hole; the adjusting threaded rod is installed in the inner threaded hole in the top end of the main rod in a matched mode; the middle pressing blocks are sequentially installed on the adjusting threaded rod in a sleeving mode; the top end of the adjusting threaded rod is inserted in the cover plate. By means of the clamp, position control and accuracy control over outer machining surfaces of the telescope lens barrels can be achieved rapidly and accurately.

The invention discloses an air purification filtering material testing experimental system which comprises an air compressor, a silica gel drying pipe, a particle matter filter and an active carbon absorption filter which are connected together through a pipeline in sequence, wherein the input end of the air compressor is connected with an air intake pipeline; the output end of the active carbon absorption filter is connected with a first mass flow controller and a second mass flow controller respectively through pipelines; the output end of the first mass flow controller is connected with a humidity control unit through the pipeline; the output end of the second mass flow controller is connected with a pollutant generating unit through the pipeline; the output ends of the humidity control unit and the pollutant generating unit are respectively connected with an input port of a mixing bottle through the pipelines; and an output port of the mixing bottle is connected with a filtering material testing unit through the pipeline. With the adoption of the air purification filtering material testing experimental system, the switchover of single channel testing clamps of different specifications is realized, the synchronous measurement on a plurality of samples is also realized; and the control precision (of a testing working situation) which is provided by relevant internal standards can be realized.

The invention provides a sand conveying mixed discharge system and a control method, including a mixed discharge device. The structure of the mixed discharge device is: a feeding hopper is provided on the top of the tank body, and a main shaft is installed in the tank body through the feeding hopper vertically. The main shaft is connected with the driving device that drives it to rotate, and a booster impeller is arranged under the feed hopper, which is fixedly connected with the main shaft and rotates with the main shaft; there is a top opening in the middle of the top of the booster impeller, and the feed hopper The bottom of the booster impeller is connected to the top opening, the side wall of the booster impeller is provided with a side wall opening, and the top opening is connected to the side wall opening; a bearing seat is provided at the bottom of the main shaft, and a sealing device is provided between the end of the main shaft and the bearing seat. Through the structure of the booster impeller, the centrifugal force can be used to maintain the pressure in the tank, so that there is no need to set up an additional booster feed tank, which greatly simplifies the structure of the equipment, reduces the installation space of the equipment, and reduces the volume of the equipment.

The invention discloses an electromagnetic principle-based driving belt with an automatic sieving function and belongs to the field of material sorting and conveying. The driving belt is provided with a sieving plate, the front end of the sieving plate is lapped on the third sub-chain of a front chain from the front to the back, the rear end is in shaft connection with the first sub-chain of a rear chain from the front to the back and rotates around the first sub-chain of the rear chain from the front to the back, a permanent magnet is arranged at the bottom of the front end of the sieving plate, a repellent electromagnet and an attractive electromagnet are longitudinally arranged in the plane with a drive front gear and a driven front gear, and the polarities of the attractive electromagnet and repellent electromagnet are opposite. By means of the structure, the electromagnetic principle-based driving belt with the automatic sieving function realizes the integration and synchronous running of conveying and sieving, optimizes the material sieving streamline and is capable of directly sieving objects according to the object quality without additional equipment.

The invention relates to an electric control method of a rheological testing device. A programmable computer controller is used as a controller. The method uses a digital intelligent servo system control the motion speed of a piston rod and a parametric control algorithm to collocate the speed ring parameter of the servo system at different operation speed sections of the piston rod. A temperature sensor and a special conversion module are used for detecting barrel temperature and transforming signals. Control programs including intelligent temperature control, digital intelligent servo and the like are defined with different circulating periods and stored in a user memory of the programmable computer controller according to task grades, so as to control and adjust the temperature of a barrel and the motion speed of the piston rod. The invention realizes the speed regulation ratios index of 1:20000 of the piston rod, obtains good dynamic and static indexes and integrates the precise detection technology and intelligent control algorithm, thereby realizing the control precision of plus or minus 0.1 DEG C of the temperatures of three sections of the barrel and realizing the cooperative control of a complex control object of the multifunctional rheological testing device.

The invention discloses a 3D printer control system based on an ARM, and relates to the technical field of 3D printer tools. An upper computer is connected with a communication interface through a wire, the communication interface is installed on a communication port of an ARM microcontroller, the power supply end of the ARM microcontroller is connected with a power supply module through a wire, and the input end of the ARM controller is connected with a thermocouple temperature detector, a capacitive grating sensor, a smoke particle and flame sensor and a pulse thermal imaging sensor. The output end of the ARM controller is electrically connected with a heating bed (electric heating device), a stepping motor with a grating, a material extrusion motor (stepping extrusion motor) and a power supply detection sensor, the storage end of the ARM controller is electrically connected with a storage module, and a touch display screen is connected with the input and output end of the ARM controller through a data line. A radiator is mounted in the pulse thermal imaging sensor, and a protective frame is mounted on the outer side of the pulse thermal imaging sensor. According to the 3D printer control system, information detection and accurate control can be realized, safety and fault detection can be realized, the use is convenient, the operation is simple and convenient, and the time can be saved.