82results about How to "Solve the error" patented technology

The invention relates to the field of graphic rendering, in particular to a high-efficiency graphic rendering system based on artificial intelligence core computing power, which comprises an intelligent task decoupling module for performing task decoupling on a graphic rendering task; the AI enhanced texture generation optimization module is used for learning a dynamic scene change rule to generate a texture map in real time, reducing calculation overhead in a repeated texture region by using a multiplexing algorithm, and performing super-resolution compensation on low-resolution textures by using a deep convolutional neural network; the AI driving illumination and shadow calculation module is used for predicting an illumination transmission path in a scene by using AI and reconstructing a dynamic shadow effect so as to realize high global illumination and shadow simulation; the task result synchronization module is used for synchronizing rendering data output by each subtask; according to the method, the high-quality texture map is dynamically generated, super-resolution compensation is carried out on the low-resolution texture, repeated calculation is avoided through a texture multiplexing algorithm, the calculation overhead is remarkably reduced, and the real-time rendering efficiency of a large-scale complex scene is improved.

The invention provides a sequence correction second-order cone global optimization method suitable for a radial power distribution network, and the method comprises the steps: introducing an auxiliary variable to decouple an original non-convex optimization problem in a power system, and enabling the original non-convex optimization problem to be equivalently converted into a bilevel programming problem; adopting a second-order cone relaxation technology to convexly solve an upper-layer planning problem and then carrying out centralized solution; decomposing the lower-layer planning problem into a plurality of quadratic planning sub-problems containing single non-convex quadratic constraint; the quadratic programming sub-problem is converted into a semi-definite programming sub-problem through Scher complement, and a strong dual gap is established through a standard S-process; and performing iterative calculation and sequence correction on the optimization result of the decoupled upper and lower layer planning problem according to an alternating direction multiplier method to ensure that the non-convex constraint is strictly established. According to the method, errors generated by convex relaxation are avoided, the reliability and global optimality of the result can be effectively ensured, and an accurate and reliable mathematical model is provided for the power distribution network with the high proportion of renewable energy sources.

The invention provides a water outlet head and a water outlet head mounting method. The water outlet head comprises an assembling seat, a switching assembly, a valve seat, a switch seat and a nut. The assembling base is fixedly arranged at a water outlet of the faucet in advance and provided with a mounting cavity. The switching assembly and the valve seat are sequentially installed in the installation cavity, the switching assembly is provided with a valve rod which is installed in a rotating mode and penetrates through the valve seat, the valve rod is sleeved with the switch seat, the switch seat is in butt joint with the valve seat, a limiting structure for limiting rotation flexibility is arranged between the switch seat and the valve rod, and the nut is locked at the end of the valve rod. The invention provides a water outlet head which solves the problems that when the installation position of a water outlet head is directly arranged on an existing faucet, forming is not easy, precision is poor after forming, and installation errors are large, and therefore a valve seat and a switch seat can be installed in a faucet water outlet in the wanted state or angle subsequently.

The invention relates to the electronic circuit manufacturing technology, and discloses automatic printing equipment for PCBA board processing and a printing technology thereof.The automatic printing equipment comprises a rack and conveying tables located on the two sides of the rack, a printing table and a printing table are arranged on the rack, the printing table and the two conveying tables are located on the same horizontal line, the printing table is located over the printing table, and the printing table is located above the printing table; a screen printing steel mesh and a solder paste dipping mechanism are arranged on the printing table, an identification probe is arranged at the bottom of the printing table in a sliding mode, a lifting mechanism is arranged in the rack and comprises a driving block, a jacking piece and a multi-stage air cylinder driving the driving block to slide, and a plurality of guide columns vertically penetrating through the bottom plate in a sliding mode are distributed at the bottom of the printing table. The supporting piece is connected to the bottom of the printing table, a conveying platform, a verification platform and a tin coating platform are sequentially arranged on the driving block in the sliding direction, the conveying platform and the verification platform are in transition connection through an inclined face, and the verification platform and the tin coating platform are in transition connection through an inclined face. The device has the effect of improving the production efficiency of the PCBA silk-screen solder paste.

This invention discloses a calibration unit for a constant velocity universal four-wheel alignment instrument with a hinged rod, belonging to the field of transportation technology. It includes a unit base, a drive motor mounted on one side of the unit base, a constant velocity rotating seat mounted above the unit base, a kingpin assembly mounted above the constant velocity rotating seat, half-shaft assemblies snapped onto both sides of the kingpin assembly, and angle adjustment assemblies sleeved above the kingpin assembly. Two angle adjustment assemblies are included, each comprising an angle adjustment base, an angle adjustment drive arm, an angle adjustment hinge plate, an angle adjustment kingpin sleeve, and an angle adjustment lever. The upper surface of the unit base is movably connected to the lower surface of the angle adjustment base. The inner side of the angle adjustment base is fitted to one end of the angle adjustment drive arm, and the other end of the angle adjustment drive arm is connected to the angle adjustment lever. The end of the angle adjustment lever away from the angle adjustment drive arm is connected to the angle adjustment hinge plate, and the inner side of the angle adjustment hinge plate is connected to the angle adjustment kingpin sleeve. This invention uses a constant velocity universal joint with a hinged rod, improving measurement accuracy.

The utility model provides a novel all-electric servo bending device. The device comprises a main rack; the sliding block is installed on the main machine frame in a sliding mode and used for bending a workpiece. The nut seat is mounted on the sliding block; the screw rod is in threaded connection with the nut column; the driving assembly is used for driving the lead screw to rotate so that the sliding block can move up and down. The limiting assembly is installed on the main machine frame through a support, and the driving assembly is installed on the driving assembly so that the lead screw can rotate stably. The driving assembly is directly connected with the lead screw, a synchronous wheel mechanism is omitted, the problems that the noise of the synchronous wheel mechanism is large and the positioning error is large are solved, a gap of a bearing in the limiting assembly is locked through the limiting assembly, and compared with a synchronous wheel mechanism adopted in the prior art, positioning is more accurate, and the problem that the precision of the bending angle of a workpiece is out of tolerance is solved; and the device has the characteristics of low noise, small repeated positioning error, simple and reliable mechanism and lower cost.

The invention discloses a high-speed heavy-load working condition bearing dynamic stiffness testing device and testing method, and relates to the field of bearing testing. The invention solves the problems that the existing bearing dynamic stiffness test technology and equipment only can load in a single direction, cannot simulate axial and radial composite loading, depends on contact transmission, is insufficient in heavy load bearing, lacks system vibration error suppression measures, and is poor in reliability. And the high-precision test requirement of the independent rolling bearing under the high-speed heavy-load composite working condition is difficult to meet. A shafting supporting module is arranged on the upper portion of a test bench support, a measuring module is located over the shafting supporting module, an axial loading module and a radial loading module apply axial force and radial force to a tested bearing respectively, and a driving module drives a supporting shaft and an inner ring of the tested bearing to rotate. Axial and radial composite loading under the high-speed heavy-load working condition can be achieved, axial and radial displacement can be monitored synchronously, system errors are reduced, and high-precision measurement of the dynamic stiffness of the bearing is achieved.

The invention discloses a finite element-near field dynamics tunnel large deformation calculation method considering creep deformation, and relates to the field of tunnel deformation calculation.The method comprises the steps that meshing is conducted on a research area of tunnel surrounding rock, and a finite element analysis area and a near field dynamics analysis area are determined; an overlapping region exists between the finite element analysis region and the near-field dynamics analysis region; determining near-field dynamic mass points according to the grids in the near-field dynamic area; performing finite element analysis on the complete finite element analysis area to obtain a tunnel surrounding rock deformation condition in the complete finite element analysis area; carrying out finite element analysis and near-field dynamics analysis on the overlapping region to obtain a tunnel surrounding rock deformation condition in the overlapping region; and performing near-field dynamics analysis considering a surrounding rock material creep phenomenon on the complete near-field dynamics analysis region to obtain a tunnel surrounding rock deformation condition in the complete near-field dynamics analysis region. The efficiency and accuracy of tunnel deformation calculation can be improved.

The invention relates to the technical field of special equipment for agricultural and sideline product processing, and discloses a sausage spacing self-optimizing energy-saving hanging rod system based on machine vision, which comprises a chassis and an electrical cabinet fixedly mounted at one end of the chassis, two upright posts are arranged on the top surface of the chassis, a top frame is arranged at the top ends of the two upright posts, and a conveying belt is arranged on the outer wall of the top frame; and a driving structure for driving the conveying belt is arranged on the electrical box. A two-stage correction structure of the sausage shaking assembly and the adjusting assembly is adopted, sausage preliminary returning is achieved through regular shaking of the sausage shaking assembly, accurate straightening is completed through the inertia effect by the adjusting assembly when sausage is not corrected in place, and the problem that the ends of sausages are hung mistakenly can be effectively solved through double correction; the sausage hanging device ensures that the joints of sausages are accurately hung at the preset positions of the hooks, so that the distance between the sausages after hanging meets the technological standard, the conditions of uneven heating and stacking extrusion caused by abnormal distance in subsequent processing are avoided, and the sausage processing yield is improved.

The utility model relates to the field of tunnel construction emergency, and discloses a tunnel construction emergency early warning system. According to the invention, through integration of an informatization technology and a mechanical device, the emergency response capability of a construction scene is significantly improved. According to the system, a multi-module linkage mechanism is adopted, the abnormal state in the hole can be sensed in real time, early warning can be triggered synchronously, and the problems of delay and information transmission errors existing in traditional manual early warning are effectively solved. When a sudden dangerous case occurs, the wireless communication and intelligent control module can quickly cover a hole opening, the interior of the hole and an adjacent tunnel with a signal, and it is ensured that an operator receives an evacuation instruction at the first time through multi-dimensional warning means such as sound and light, voice and traffic signals. Meanwhile, due to intervention of the fixing support and automatic equipment, the posture of the construction trolley can be stabilized, the safety risk of manual operation is avoided, and the probability of secondary disasters caused by instability of the equipment is reduced fundamentally.

This application discloses an alarm information extraction method, the method comprising: determining a first pattern string of sample multi-valued information elements of a sample alarm text; wherein the sample multi-valued information elements include key information items and value information items composed of multiple key-value pairs; the first pattern string is used to characterize the overall structure of the value information items in the sample multi-valued information elements; clustering the first pattern string to obtain a pattern set, and determining the set features of the pattern set; wherein the set features can identify the pattern set; generating a feature pattern library based on the set features of the pattern set and the first pattern string of the pattern set; and analyzing and processing the alarm text to be processed and the feature pattern library to obtain the target multi-valued information elements of the alarm text to be processed. This application also discloses an alarm information extraction device and a computer-readable storage medium.

A method for synchronous excitation of multiple exciters relates to the field of dynamic testing and vibration control technology for large civil structures. The method includes the following steps: after constructing a unified time reference based on satellite navigation signals and a rubidium atomic clock, excitation amplitude and phase parameters are obtained based on the target modal requirements, and these parameters are sent to all exciter slave stations; the exciter slave stations generate a reference trajectory based on the excitation amplitude and phase parameters, enabling the exciter motor shaft angle to follow the reference trajectory in real time and output the target excitation; the phase error is obtained based on the measured excitation phase value and the reference trajectory, and then the motor angular velocity of the exciter is corrected based on the phase error. This invention solves the problems of startup phase error and long-term frequency drift in master-slave triggering schemes, ensuring synchronous start-up of all exciters. Combined with dynamic correction of the exciter motor angular velocity, it suppresses phase drift during long-term operation, significantly improving the excitation efficiency of higher-order modes and the clarity of the response signal.

The invention discloses a method and device for recognizing a design drawing of the style and appearance of a countryside, terminal equipment and a storage medium, and the method comprises the steps: predicting a style type and a style score of the design drawing through a style recognition and scoring model, and calculating the style of the design drawing according to the predicted style type by referring to preset reference basic components and reference space design elements; and further calculating a basic component score and a spatial design element score of the design drawing, according to the style score, the basic component score and the spatial design element score, calculating a comprehensive score of the design drawing, according to the comprehensive score, judging whether the design drawing accords with the style design of the countryside overseas countryside or not, and determining a corresponding style type. According to the method, whether the design drawing is the style and appearance design drawing of the overseas countryside or not can be automatically identified, the specific style and type of the overseas countryside can be identified, the technical problems of large errors and time and labor consumption caused by dependence on manual identification of the design drawing in the prior art are solved, manpower is saved, and efficiency and accuracy are improved.

The invention relates to the technical field of BIM (Building Information Modeling) technology offset monitoring, in particular to a stay cable steel strand replacement offset monitoring method by utilizing a BIM technology, which comprises the following steps: marking a replaced stay cable on a cable-stayed bridge as a target stay cable, and acquiring displacement data of each monitoring point on the target stay cable and adjacent stay cables; obtaining the vibration interference degree of the target stay cable, and analyzing the displacement data accuracy of each monitoring point of the target stay cable; and according to the vibration interference degree and the displacement data accuracy of the target stay cable, the displacement data credibility of each monitoring point of the target stay cable is obtained, and the displacement data of each monitoring point of the target stay cable is screened based on the displacement data credibility, so that the deviation of the target stay cable is monitored in combination with a cable-stayed bridge BIM model. According to the invention, the monitoring precision of the replacement offset of the stay cable steel strand can be improved.

The utility model belongs to the technical field of radiation monitoring, and particularly relates to a placing rack for a radiation dosimeter in use, which comprises a support plate, a threaded table, a lifting table, a rotating seat, a sliding rod and the like, the threaded table is fixedly connected to the top end of the support plate, the lifting table is in threaded connection to the threaded table, the rotating seat is rotatably connected to the upper portion of the lifting table, and a placing groove is formed in the rotating seat. The multiple sliding rods are distributed with the center of the rotating base as the reference and slidably connected into the rotating base. Through the design of the rotating seat, rapid placement and positioning of the radiation dosimeter body are achieved, the stability of the radiation dosimeter body in the placement process is ensured by means of the synergistic effect of a sliding rod, a first spring and an arc-shaped clamping plate, and powerful support is provided for subsequent monitoring work; the problems of inconvenience and errors caused by the fact that the radiation dosimeter needs to be manually held by hand for monitoring for a long time are effectively solved.

The utility model provides a large-span combined-section bailey beam capable of accurately positioning, which belongs to the technical field of bailey trusses and comprises a bailey beam, a plurality of beam bodies and a plurality of beam bodies, the bailey beam comprises two chord members and two vertical rods, and the two vertical rods are welded at two ends of the two chord members to form a rectangular frame structure; the reinforcing frames are arranged between the two vertical rods and are sequentially arranged at intervals; the two positioning mechanisms are detachably arranged outside the vertical rod, and each positioning mechanism comprises two positioning pieces. The novel bailey truss has the advantages that the two detachable positioning mechanisms are arranged, the problems of difficulty and errors existing when a traditional bailey truss is used for welding and positioning a reinforcing frame are effectively solved, the positioning mechanisms can be rapidly mounted and dismounted through the opening design of the sliding frame, the locking structures abut against the side faces of the vertical rods through the locking rods, and the locking effect is good. It is ensured that the positioning mechanism is stable and reliable in the using process, the inclined supporting face on the positioning block provides a precise abutting position for the bent end of the reinforcing frame, and the positioning precision during welding is remarkably improved.

The invention discloses a method for transmitting data among different system devices, which comprises the following steps that: a TLV frame consists of a frame header, a tag, length data length, value data and CRC (Cyclic Redundancy Check) check and is represented by hexadecimal, a frame header 0xFD is added in front of each frame of data, a machine B judges whether the first byte of the received data is the frame header or not, data analysis is carried out, and the data is transmitted to the machine B; according to the method, the processing of the next normal message cannot be influenced by the previous error message, the problem that all the messages are wrong due to the error of one frame can be solved through a mechanism of adding the frame header, a CRC check value is added to the last of each frame of data, once the error of one frame of data occurs, the CRC check of a receiving party must be wrong, and the processing efficiency of the receiving party is improved. In this way, the next frame of data can be analyzed, the processing of frame header and tail CRC verification is added, the data length is accommodated and expanded to two bytes, the longest 65000 + byte data can be represented, and most of Internet of Things data interaction scenes can be covered.

This invention discloses a gap detection system, milling equipment, and detection method for drill pipe strings, belonging to the field of automated production in coal mine underground drilling equipment manufacturing. It includes a conformal gap detection mechanism comprising a cylinder. A connecting frame structure and a conformal roller structure are sequentially arranged at the bottom of the cylinder. A U-shaped mounting frame is arranged on the transverse front side of the conformal roller structure. The transmitting and receiving ends of a digital fiber optic sensor are respectively installed on the two outer side walls of the U-shaped mounting frame. The conformal gap detection mechanism incorporates a digital fiber optic sensor, enabling real-time monitoring of the gap width between drill pipe strings. It can automatically detect the gap difference between drill pipe strings of various specifications without manual intervention, solving the problems of low efficiency and large errors in traditional manual detection. Furthermore, the system boasts high detection accuracy and fast response speed, ensuring the accuracy and timeliness of gap deviation judgment.

The utility model belongs to the field of hydropower station detection, and particularly relates to an automatic annunciator for detecting water quantity in oil, which comprises an ARM, a digital temperature sensor, a capacitor, a clock circuit, an optical coupler I, a DA conversion circuit, a far-end receiving end, an optical coupler II, an alarm relay and an automatic control loop, the capacitor is connected with the clock circuit, the clock circuit is connected with the optical coupler I, and the optical coupler I is connected with the ARM through one path of I / O port; the digital temperature sensor is connected to the ARM through an I / O port; the capacitor and the digital temperature sensor are in contact with water-containing oil to be measured, a mathematical model is arranged in an ARM control program, the percentage of water in the oil is calculated through frequency, and the percentage of water in the oil is compensated through temperature. According to the utility model, the problem that the error of detecting the percentage of water in oil by a capacitance method is increased due to oil temperature rise is avoided.

The present invention discloses a forward vehicle distance detection method based on cascade SSD and monocular depth estimation, comprising the following steps: S1, obtaining forward vehicle training samples and depth estimation data sets; S2, building a backbone network; S3, building a target detection network; S4, building a depth estimation subnetwork; S5, training a forward vehicle distance detection network based on a cascade SSD network and monocular depth estimation; S6, selection and distance detection based on K-means clustering feature points. The present invention adopts an extended receptive field module based on dilated convolution to expand the receptive field, and combines an online feature selection strategy to improve the accuracy of small-scale vehicle target detection; in view of the problem of inaccurate vehicle positioning, a cascade SSD network is proposed, and the problem of feature misalignment caused by the anchor frame mechanism is alleviated by introducing deformable convolution; in view of the problem of inaccurate selection of monocular depth estimation feature points, a selection and ranging method based on K-means clustering feature points is proposed, which effectively solves the problem of large lateral and longitudinal ranging errors.

The utility model discloses an integrated touch control electronic watch and control panel's interactive device, including box body, control panel and press structure, the box body inside is formed with the accommodation cavity, and is equipped with with control panel opening and display window that is linked together with accommodation cavity, display window is used for touch control electronic watch to put into the accommodation cavity and show its display area, control panel is installed in the accommodation cavity through control panel opening, and is linked together with touch control electronic watch wireless, is used for receiving instruction and performing corresponding function operation, press structure is located in the box body, and its position corresponds to the watch button of touch control electronic watch in the accommodation cavity, is used for carrying out press operation to watch button, and this device has realized the convenient operation of touch control electronic watch under the accommodation state, has solved the problem that traditional storage box can not operate watch button.

The utility model relates to an adjustable battery test positioning mechanism, in particular to a positioning mechanism, which comprises a placing box, two moving grooves are respectively arranged on the left side surface and the right side surface of the inner wall of the placing box, and moving assemblies are arranged in the moving grooves. The left side face and the right side face of the inner wall of the containing box are slidably connected with the faces, away from each other, of the two connecting frames correspondingly, a servo motor b drives a screw rod b to rotate, the screw rod b rotates to drive a threaded sleeve b to move leftwards, the threaded sleeve b moves leftwards to drive the containing box to move leftwards, and a servo motor c drives a screw rod c to rotate. The screw rod c rotates to drive the threaded sleeve c, the movable frame a and the placing box to move backwards, the first positioning assembly and the second positioning assembly form a cross, fixed-point positioning is carried out on the battery in the placing box through cross positioning, and the problems that an existing device needs manual positioning, fixed-point testing cannot be carried out on the testing surface of the battery, and errors of the testing result occur are solved.

The application discloses a kind of based on deep separable convolution improved remote sensing image road extraction method and system, it is related to remote sensing image processing technical field.A kind of based on deep separable convolution improved remote sensing image road extraction system, including have: data acquisition module, tree crown shadow compensation module, model construction module, model training module, road extraction module, storage module and display module.The application is compensated by constructing tree crown translucent shadow compensation module, and the shadow attenuation priori graph generated based on radiation transmission physical model DART is fused with original image channel cascade, so that the model can understand the formation process of tree crown shadow from the physical mechanism level, effectively restore the occluded road information, solve the technical problems that traditional deep learning method lacks explicit modeling of translucent shadow, and it is difficult to distinguish real road dark area and shadow false dark area.

This invention discloses an artificial intelligence-based multi-path aggregation and cleaning system for unstructured data. The invention relates to the field of data processing technology and includes a control center. The control center is communicatively connected to a two-level adaptive AI extraction module, a two-layer key aggregation module, a stage state machine determination module, a visual conflict resolution module, and a full lifecycle management module. This invention employs a strong-weak key parallel multi-path aggregation strategy, effectively solving the data merging problem in scenarios where globally unique identifiers are missing. Through the synergistic effect of strong key precise matching and weak key semantic fuzzy matching, the probability of erroneous and missed aggregations is reduced. Simultaneously, combined with standardized processing such as field normalization and logical completion of missing values, as well as optimized design of dynamic thresholds and weight parameters, the accuracy, completeness, and format uniformity of large-scale unstructured data aggregation are improved, providing high-quality structured data support for downstream analytical applications and significantly enhancing the value of data reuse.

This application relates to a method, system, device, storage medium, and computer program for complex near-surface shallow velocity modeling. The method includes: acquiring preset shot-receiver surface elevation, shot line spacing, and receiver line spacing; smoothing the preset shot-receiver surface based on the shot line spacing and receiver line spacing to obtain a first updated surface at different smoothing scales; smoothing the acquired total static correction to obtain low-frequency static correction and high-frequency static correction; smoothing the first updated surface based on the low-frequency static correction and high-frequency static correction to obtain a first simulated surface; constructing an initial near-surface gradient model based on the first arrival time of each seismic trace, the preset shot-receiver surface elevation, and the first simulated surface, and performing iterative inversion using wave tomography to obtain a final velocity model; and using the final velocity model to perform velocity analysis on each seismic trace to obtain seismic data characteristics. This method improves the accuracy of near-surface velocity modeling and reduces near-surface velocity modeling errors.

The utility model relates to the technical field of deviation rectifying and guiding, in particular to a deviation rectifying and guiding machine suitable for a printing machine, which comprises a machine frame, four driving rollers which are horizontally distributed on the machine frame at intervals and are rotatably connected with the machine frame, and a deviation rectifying supporting roller which is rotatably connected with the machine frame is arranged between the two driving rollers in the middle position. A middle-position conveying belt is arranged between the two transmission rollers located at the two ends in a sleeved mode, two side-position conveying belts arranged on the front side and the rear side of the middle-position conveying belt respectively are arranged between the two transmission rollers located on one side of the deviation rectifying supporting roller in a sleeved mode, and deviation rectifying wheels are arranged on the front side and the rear side of the top of the deviation rectifying supporting roller. According to the paper deviation rectifying device, deviation rectifying can be conveniently carried out on paper from the two sides of the paper, abrasion to the printing position in the middle of the paper is reduced, meanwhile, deviation can be conveniently recognized, deviation rectifying can be automatically carried out, the paper deviation rectifying efficiency is improved, and the paper deviation rectifying device is suitable for popularization and application. And the problems of errors caused by manual deviation identification and deviation correction delay are solved.

The utility model belongs to civil construction equipment technical field especially relates to a civil construction support device, including base, the base is located in the side of wall, the other side of base is equipped with hinged member through welding, the hinged member is swingingly connected through connecting rod, the other side of hinged member swingingly installs support rod, the bottom of support rod swingingly installs on support base, the bottom fixed mounting of support base has rubber damping pad. This civil construction support device, hinged mechanism is combined with lock nut, spring pre -tensioning half -spherical pre -tightening spare through stud, realizes hinged ball ± 15 DEG rotation and mechanical self -locking, and the tensile force is more than 200kN, improves installation efficiency, and the support mechanism is with the structure of sleeve, realizes the regulation of ± 1mm accuracy with hydraulic cylinder and laser range finder, the bottom is designed to adapt to the inclined ground, hot-dip galvanizing and fluorocarbon coating prolong the life, solve the many problems of traditional device.

The application discloses a natural gas compressor selection method, comprising the following steps: selecting a basic data unit of the compressor; setting a natural gas component; setting ambient environment data; setting a compressor operation parameter input matching function to obtain a compressor type; testing the selected compressor type; and generating a selection report output according to the selected compressor type. The application also provides a natural gas compressor selection device. By setting the basic data unit, the gas component and the ambient environment data, the compressor is matched, and the performance of the compressor under different conditions is simulated, so that the basic selection of the compressor type is ensured, and the defects of the artificial calculation data, such as the lack of accuracy and errors, are solved.

The utility model belongs to the technical field of electrolytic aluminum production, and relates to a movable split type optical auxiliary positioning device for anode replacement operation in aluminum electrolysis production. The device comprises an optical positioning device and an anode scrap bottom height positioning device arranged below the optical positioning device, the optical positioning device comprises an upper sliding rail and an upper sliding block; the upper slide block is matched with the upper slide rail; a laser transmitter is fixedly arranged on the upper sliding block; the anode scrap bottom height positioning device comprises a movable base, a lower sliding rail, a right-angle caliper and a right-angle caliper height adjusting mechanism. According to the utility model, the problems of safety risk and large positioning error in the process of positioning the height of the marking line on the anode scrap guide rod can be effectively solved, and the precision of the loading height of a new anode is improved on the premise of ensuring the safety.

The utility model discloses a gas sensor packaging structure and a gas concentration detector, the gas sensor packaging structure comprises a packaging shell and a sealing plate; a detection cavity is formed in the packaging shell, an air inlet and an air outlet are formed in one side of the packaging shell, a glue filling groove is formed in the other side of the packaging shell, and a detection opening is formed in the bottom of the glue filling groove; the detection cavity is sequentially communicated with an air inlet channel, a detection channel and an air outlet channel, the air inlet channel is communicated with the air inlet, the detection channel is communicated with the detection port, and the air outlet channel is communicated with the air outlet; the sealing plate is arranged in the glue pouring groove, an induction assembly is fixed to the sealing plate, the induction assembly is arranged towards the detection opening, and the sealing plate covers the detection opening. The utility model can solve the problem of long-term stability of the sensor.