53results about How to "Accuracy is easy to control" patented technology

The invention relates to a power line carrier-based intelligent networking control system and method. The system comprises nodes (103 and 104), which are connected to a charging line of a power line for transceiving control commands and data on the power line through the power line carrier, wherein the first node (104) of the nodes (103 and 104) is the root node of the network needing to be organized, the first node (104), as a parent node, is used for broadcasting networking signals on the power line through the power line carrier, the second nodes (103 and 104) which receive the networking signals and meet the scheduled communication quality standards join the network as child nodes of the first node (104), the first node (104) allocates network configuration information to the second nodes, the first node (104) is used for forming a routing table according to the allocated network configuration information, and the network configuration information of all the nodes of the network is recorded in the routing table.

The invention relates to a three-dimensional endoscopic measuring unit and a method based on the grating projection, comprising an optical fiber image guide, an amplitude-type transmission grating, a collimating lens, a semiconductor laser light source, a micro CCD sensor array, a transmission line, an image capture card and a computer. The three-dimensional endoscopic measuring unit is characterized in that: the computer comprises a corresponding image processing and three-dimensional profile calculation and reconfiguration software; the amplitude-type transmission grating is projected on the measured surface during endoscopic observation; the grating fringe is modulated by the measured surface, so as to generate deformation; the deformation grating fringe is collected through a CCD imaging system; and the three-dimensional profile information of the measured target is obtained through computer image processing and a three-dimensional profile reconstruction algorithm. The three-dimensional endoscopic measuring unit has the advantages of being able to obtain the three-dimensional profile information of the endoscopic object with fast measurement, higher measuring accuracy and simple way.

A pair of soldering pliers comprises a power element, a driving mechanism, an electrode installing seat, an electrode, a clamping head installing seat and a clamping head, wherein the driving mechanism is connected with the power element; the electrode installing seat is driven by the driving mechanism to perform motion; the electrode is installed on the electrode installing seat and driven by the electrode installing seat to perform closing work or achieve an open state; the clamping head installing seat is connected with the driving mechanism, driven by the driving mechanism to perform motion and arranged corresponding to the electrode installing seat; and the clamping head is installed on the clamping head installing seat and driven by the clamping head installing seat to perform closing or opening motion. By enabling the electrode installing seat and the clamping head installing seat which are corresponding to each other to be simultaneously arranged on the driving mechanism, the electrode and the clamping head are correspondingly arranged on the same pair of soldering pliers, an integrated structure is formed, integral driving and control can be performed through the power element, the problems that the distance between a traditional pair of soldering pliers and a clamp for clamping a workpiece is far and installing positioning and the like caused by separated arrangement of the soldering pliers and the clamp are inconvenient to control and operate are solved, and uniform driving is performed through the driving mechanism so as to perform uniform control and facilitate control and automatic operation.

The invention discloses a control method and device of a heat pump unit. The method comprises the following steps: acquiring an outdoor ambient temperature; determining a frequency regulating parameter according to the outdoor ambient temperature, wherein the frequency regulating parameter is used for regulating and correcting compressor running frequency; utilizing the frequency regulating parameter and the compressor running frequency determined at the last moment to calculate compressor running frequency at the current moment; and controlling a compressor work according to the compressor running frequency at the current moment. The control accuracy of the compressor running frequency is better, and the control precision of indoor ambient temperature is higher.

The invention relates to an accurate measurement fed-batch device for a fermentation tank and a fed-batch method for a high-concentration solution. The fed-batch device comprises the fermentation tank, a membrane filter, a measuring pump, a fed-batch tank, valves and an electronic monitoring system. A fed-batch tube valve, a filter rear valve, the membrane filter, a measuring pump liquid outlet valve, the measuring pump, a measuring pump liquid inlet valve and the fed-batch tank are connected in sequence through a pipeline from the fermentation tank; an exhaust steam valve is connected onto one side of the fermentation tank of the measuring pump liquid outlet valve by a pipeline; one end of a steam valve is connected onto one side of the filter rear valve of the fed-batch tube valve through a pipeline; the other end of the steam valve is connected with a steam pipeline S; and another exhaust steam valve is connected onto one side of the fermentation tank of the fed-batch tube valve through a pipeline. A fed-batch material is a low-water activity high-concentration solution, and bacteria in fed-batch liquid are removed by filtration by a membrane filtration method without steam sterilization. According to indicative indexes in the fermentation process, such as fermentation time, pH, foam height and fermentation respiratory quotient, accurate measurement fed-batch feed supplement is performed through the electronic monitoring system. The control precision of feed supplement amount reaches 1 percent or less. The accurate measurement fed-batch device is suitable for different-scale fermentation tanks for experiments and production.

The invention relates to an extreme event prediction method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring historical electrical parameters of a power system in a first historical time period; obtaining the Gibbs measure of the historical electrical parameters; inputting the Gibbs measure into a pre-trained event prediction model to obtain prediction information output by the event prediction model, the prediction information being used for indicating whether an extreme event will occur in the power system at a target future moment after the first historical time period, wherein the event prediction model comprises a plurality of neural network layers constructed based on an XGBoost algorithm and an extended convolutional network used for linking the neural network layers. By adopting the method, the extreme event can be predicted.

The invention discloses an offline cleaning method for an immersion type ultrofiltration membrane stack. According to the offline cleaning method, the ultrofiltration membrane stack is subjected to offline cleaning through acid cleaning, alkali cleaning and back washing, and a pipeline system of an online membrane pool can be simplified; ultrasonic treatment is adopted in the cleaning process, and the cleaning effect is good; the cleaning process of the ultrofiltration membrane stack is automatically completed through a controller, a mechanical arm and an ultrasonic unit, the control accuracy of the cleaning process is good, and the cleaning efficiency is high.

The invention discloses a pre-buried latticed column verticality measurement construction method, and belongs to the technical field of building-construction. The steps of the pre-buried latticed column verticality measurement method includes that: pre-buried latticed columns are processed, a biaxial inclinometer is chosen, a sensor is calibrated, the inclinometer is assembled, a position is chosen for installation of the inclinometer, the pre-buried latticed columns and the inclinometer are installed and placed, biaxial inclination angles of the pre-buried latticed columns are measured and adjusted, after concrete pouring is finished, the inclinometer is detached, and the like. According to the pre-buried latticed column verticality measurement method, due to the facts that the inclinometer is arranged on the pre-buried latticed columns, in the construction process of the pre-buried latticed columns, angle ranges are regulated timely to enable the angle ranges to be within designed ranges according to the perpendicular angel changing displayed on a displayer, and then the pre-buried latticed columns are fixed, the accuracy and perpendicularity degree of the locating of the pre-buried latticed columns and the direction of the pre-buried latticed columns are convenient to control, and therefore the pre-buried latticed column verticality measurement method is applicable for construction of basements with large excavation depths, safety of building foundation pits, surrounding roads and pipelines is guaranteed, overall project construction progress is accelerated at the same time, project manufacture cost is saved, and economic benefit is improved.

The invention discloses a horizontal type numerical control boring-milling machine comprising a machine body, a big upright post, a slide block, a fixed sleeve and a gear box, wherein the fixed sleeve and the gear box are installed on the slide block, the gear box is connected with a motor and is connected with a tail cylinder simultaneously, the inside of the fixed sleeve is provided with a sleeve barrel, the insides of the sleeve barrel and the tail cylinder are provided with boring bars, and the motor drives the boring bars and the sleeve barrel to run simultaneously by driving a speed reduction gear in the gear box; and the tail ends of the boring bars are fixed on a round slide block positioned in the tail cylinder, and the round slide block is driven by a lead screw so as to control the boring bars to carry out axial motions. The invention has the beneficial effects that independent design for the horizontal type numerical control boring-milling machine is realized as a whole; compared with the existing horizontal type boring-milling machine, the structure layout of the product is simple and reasonable, parts adopt a structure which is easy to manufacture, and the manufacturing cost is saved; and simultaneously, the design scheme can reasonably control the precision and has more extensive market prospect in comparison with similar domestic and foreign products.

The present invention discloses an optocoupler current detection circuit. The optocoupler current detection circuit comprises a current detection unit, an optocoupler negative feedback unit and a reverse amplification unit; the input end of the current detection unit is adopted as the input end of the optocoupler current detection circuit; the output end of the reverse amplification unit is adopted as the output end of the optocoupler current detection circuit; and the current detection unit, the optocoupler negative feedback unit and the reverse amplification unit are connected with one another sequentially. According to the optocoupler current detection circuit provided by the technical schemes of the invention, an optocoupler is adopted in the current detection unit, so that the application of a high-resistance resistor is avoided, and therefore, the accuracy of the detection of the circuit will not be affected by the instability of the high-resistance resistor when the circuit is used under high-temperature high-humidity harsh environments; and an optocoupler can be adopted to constitute the negative feedback circuit so as to play the role of automatic adjustment, and detection results can be stable and balanced.

A high-speed data compared latch with auto-adjustment of offset, includes input pair transistors P, input pair transistors N, a compared latch module, an input control module, an output control module and a offset logic control module, the offset logic control module creates two control signals that regulate the number of input pair transistors P and input pair transistors N respectively according to reset signal RESET and the latched output of the compared latch module, and achieve self correcting of offset through regulating the number of the input pair transistors P and the input pair transistors N. The present invention is a feedback mechanism, automatically trimming the number of differential input pair to achieve the trimming differential pair operating point and the threshold voltage, eliminate the process variation, and latch on more precise control match the differential input pair transistors of the high-speed data compared latch in receiver accurately.

The invention relates to a pressure vessel simulation analysis method. The pressure vessel simulation analysis method comprises the steps of acquiring objective parameters of existing pressure vessels; establishing a key value comparison table; using a CAD (Computer Aided Design) tool to import parameter data correlated with structural dimension to form a wire-frame model; using a CAE (Computer Aided Engineering) tool to import the wire-frame model; enabling the wire-frame model to form a solid model through the CAE tool; determining the meshing of the solid model by using the CAE tool according to the parameter data correlated with the structural dimension in the complete parameter data, and applying load to an analysis model based on meshes according to physical attribute parameters in the complete parameter data; using the CAE tool to optimize result data and outputting the result data to the key value comparison table; backing-up the original parameter values through the key value comparison table and updating the original parameter values of corresponding key value items. By adopting the pressure vessel simulation analysis method, the modeling and data operation efficiency of finite element analysis is improved. The invention additionally provides a lossless parameter transmission device.

The invention discloses a vertical prefabricating construction method of a cooling tower herringbone column.The method sequentially includes following processes: flattening and hardening a prefabricating yard; setting up a scaffold; mounting a formwork base; making rebars; binding the rebars; making a formwork; mounting the formwork; pouring concrete; demounting the formwork; maintaining the concrete.By using the method, prefabricating can be advanced, and construction period is shortened; the formwork can be quickly circulated and is convenient to mount, and progress is accelerated; number of formworks needing to be purchased is small, cost is saved, and the method is economical and applicable; a rebar cage is vertically mounted, so that accuracy of a position is easy to control and quality of the herringbone column is guaranteed.The method has the advantages of attractive appearance, saving of materials, high construction speed and good economic benefit.

The invention belongs to the technical field of flexible circuit boards, and particularly relates to a manufacturing process of a hollow flexible circuit board of a new energy vehicle. The manufacturing process of the hollow flexible circuit board of the new energy vehicle comprises the following steps: 1) forming a circuit on a copper foil of a copper foil plate of a base film; 2) printing ink onthe copper foil and the base film; 3) etching a hollow rudiment on the base film by using laser etching, and the copper is not exposed at the hollow rudiment after the laser etching; and 4) etching the location of the hollow rudiment with an etching solution. The efficiency of the hollow forming is high, the precision is high, and the using performance of the flexible circuit board is improved.

The invention relates to electric-energy-storage high-precision air conditioning equipment using a low-grade heat source heat pump. The equipment comprises a low-grade heat source, an adsorption-type heat pump, a heat energy storage device and an air conditioning system. The heat energy storage device comprises a heat-electricity conversion device and an electric energy storage device. The air conditioning system is a compression-type air conditioning system. The low-grade heat source is converted into a high-temperature heat source through the adsorption-type heat pump, then the high-temperature heat source is converted into electric energy through the heat-electricity conversion device, the electric energy is supplied to the air conditioning system and excessive electric energy is stored in the electric energy storage device for future use. The electric-energy-storage high-precision air conditioning equipment using the low-grade heat source heat pump has the advantages that since the heat energy is converted into the electric energy through the heat-electricity conversion device and then the electric energy is stored, the electric energy density is improved and the occupied space is saved; since the electric energy is used for driving the ordinary compression-type air conditioning system, the precise control of an air conditioner is easy to realize and the use requirements of places which have higher requirements on the air conditioner can be met.

The invention relates to a control method and system for automatic flushing of a closestool and an intelligent closestool. The control method comprises the following steps of 1, powering the closestool; 2, detecting whether a human body sits or not through a first detection module, and detecting the physical property of liquid in the closestool through a second detection module; 3, when the firstdetection module does not detect that the human body sits on the seat and the second detection module detects that the physical attribute changes according with the condition, controlling the closestool to execute flushing, and returning the process to the step 2 after flushing is finished; and when it is not detected that the physical attributes change in accordance with the condition, repeatingthe step 2. The system comprises a sitting sensing module, a TDS detection module and a flushing control module. According to the control method for automatic flushing of the closestool, the use experience of the closestool can be improved, manual touch and pressing are not needed, sitting induction and physical properties for detecting the liquid level in the closestool are combined, accurate control is achieved, and use by a user is facilitated.

The invention provides an underwater proportional triggering device for a sand taking device, which belongs to the technical field of an auxiliary device of the sand taking device. A bracket portion comprises a bracket II; a power portion comprises a rotatable pulley, a floating ball that can pass through a suspension rod and moves along the suspension rod, a traction rope connecting the floatingball and the outer wall of the pulley, a scroll spring mounting shaft that extends from a first end of the pulley into the pulley without rotation with the pulley, a scroll spring and a right angle reducer; a proportioned portion includes a shaft I, a gear A, a gear C, a shaft II, a pin fixing wheel, a gear D, a gear B, a compression spring and a pin shaft; and a triggering portion includes a mounting bracket, a four-bar mechanism rod II, a four-bar mechanism rod III, a four-bar mechanism rod IV, a first connecting member, a second connecting member, a torsion spring, a pressing rod and a drawstring. The device realizes mechanical automation, reduces the work intensity of the staff, and shortens the measurement time. The control accuracy is only related to the machining accuracy of the parts, which avoids the control accuracy being affected by the temperature drift and zero drift of the electronic components.

The invention relates to a quantitative filling device. The quantitative filling device is provided with two or more than two circulation pipelines to connect a liquid inlet pipe and a liquid outlet pipe, all the pipelines converge to a same filling valve for filling so that the filling flow is increased, the filling efficiency is improved, multilevel control is achieved, the cost is reduced, and the control is convenient.

The invention discloses a control method and control device of a terminal device, and a terminal device. The method includes the following steps that: an action operation instruction initiated by a user through the terminal device is monitored; control content corresponding to the monitored action operation instruction is determined according to a preset corresponding relation between the action operation instruction and the control content, wherein the corresponding relation goes into effect when a communication connection is established between the terminal device and a head-mounted display device; and the terminal device is controlled according to the control content. When the user uses the head-mounted display device to watch multimedia information played in the terminal device and cannot sense the visual operation interface of the terminal device, based on the preset corresponding relation between the action operation instruction and the control content, the action operation instruction initiated by the user through the terminal device is identified, and therefore, the action operation instruction identification precision of the terminal device can be effectively enhanced, and the accuracy of control on the terminal device can be greatly improved.

The invention discloses an elevator traction machine brake precision control system and method. The system comprises an upper computer. The upper computer comprises an automatic voltage regulator current state detection module, a frequency converter current state detection module, an encoder pulse number state detection module, an automatic voltage regulator control module, an encoder pulse number monitoring module, a frequency converter output state detection module and an automatic voltage regulator stop control module. A frequency converter, an automatic voltage regulator, a traction machine, a brake and an encoder are controlled by the upper computer. The elevator traction machine brake precision control system and method have the advantages that the cost is low, the reliability is high, operation is convenient, and the structure is simple. The brake control precision is improved on the traction machine achieving complete machine installation directly on the existing production conditions, no other tool equipment needs to be specially designed for carrying out precision machining on the brake, installation and debugging are easy, and the system and method can be widely applied to brake production.

The invention relates to a servo valve automatic centering device and method, and belongs to the technical field of servo valves. The problems that in the prior art, the servo valve manual centering efficiency is low, and precision is not high are solved. The servo valve automatic centering device comprises an installing base, a servo unit, a connecting rod unit, a detection unit and a control unit. A servo valve body of the servo valve is detachably installed on the installing base. The servo unit is connected with a receiver of the servo valve through the connecting rod unit, and the receiver can move relative to the servo valve body. The detection unit is used for detecting the air pressure value of two airflow channel air outlets of the receiver in real time and transmitting the testedair pressure data to the control unit in real time. The control unit controls the servo unit to adjust the position of the receiver according to the air pressure data tested in real time. The servo unit is controlled to adjust the position of the receiver, manual adjustment is not needed in the whole process, the process is automatic and controllable, and the centering efficiency and precision can be effectively improved.

The invention relates to a garment edge folding hot press forming device and method, and the garment edge folding hot press forming device comprises a hot press forming mechanism and an edge folding positioning mechanism; the edge folding positioning mechanism comprises a positioning long strip, one long edge side of the positioning long strip is connected with a pressing plate, the lower surface of the pressing plate is flush with the lower surface of the positioning long strip, a support is arranged on the machine table, the pressing plate is hinged to the support, and the machine table is further provided with a supporting table used for supporting the pressing plate. The positioning long strip comprises an upper long plate and a lower long plate, and the two sides of the upper long plate and the lower long plate in the width direction are connected; a partition cavity is formed between the upper long plate and the lower long plate, a conveying belt connected end to end is wound around the upper long plate in the length direction, the outer surface of the conveying belt is covered with a fixing belt, the two side edges of the fixing belt in the width direction are fixed to the conveying belt, and long holes extending in the width direction of the fixing belt are evenly formed in the middle of the fixing belt in the length direction. The garment edge folding hot press forming difficulty can be reduced, and the forming precision can be improved.