106results about How to "Avoid inaccurate detection" patented technology

The invention discloses an elastic supporting device vibration strain monitoring method. A supporting body of an elastic supporting device comprises a bearing pedestal and a plurality of elastic cage strips which are distributed in the circumferential direction of the bearing pedestal, wherein one end of each elastic cage strip outwards extends in the radial direction of the supporting body to form an installation edge, and a gap is formed between the circumferential outer wall of the bearing pedestal and a machine box and filled with lubricating oil so as to form an extruded oil film damper. The method includes the steps that a strain gauge is attached to at least one elastic cage strip and connected to a vibration strain measuring instrument outside the machine box through a lead, and the vibration strain value of the strain gauge is detected through the vibration strain measuring instrument; whether the detected vibration strain value is larger than the preset vibration strain alarm threshold value or not is judged, and an alarm signal is generated if yes. By detecting the vibration strain value of the strain gauge, the vibration strain of the elastic supporting device is accurately detected, it is ensured that a journal of the bearing pedestal works within an extruded oil film linear area, an alarm is given once the vibration strain value exceeds the threshold value, and safe running performance of a rotor is improved.

The invention discloses a road deviation monitoring method. The method comprises the following steps: acquiring the driving state data of an automobile through a positioning module; comparing the driving state data with road data in a high-precision electronic map, and determining a road point optimally matched with a current position point in the driving road of the automobile; acquiring steering wheel angle data; determining the predication locus of the automobile through combining the internal and external steering ratio factor and the front and rear wheel base of the automobile according to the steering wheel angle data; predicating the predication position point of the automobile in the predication locus after driving a preset distance; determining a predication road point optimally matched with the predication position point in the road of the high-precision electronic map; and determining whether the automobile deviates from the road or not according to exceeding of a difference between a first deviation and a second deviation of a preset threshold or not. Compared with traditional technologies, the road deviation detection method adopting the above technical scheme is no longer dependent on an image visual technology in order to avoid light and other environment fluencies and improve the accuracy of detection and early warning.

The invention relates to a detection apparatus, in particular to a sewage sampling and detecting apparatus. The invention aims at solving the technical problem to provide a sewage sampling and detecting apparatus. In order to solve the technical problem, the invention provides a sewage sampling and detecting apparatus. The sewage sampling and detecting apparatus comprises wheels, test paper and a sampling apparatus and the like; the bottom of a bottom support is provided with the wheels, a top support and a moving apparatus are arranged at the inner bottom of the bottom support, the top support is arranged at the left side of the moving apparatus, the moving apparatus is connected with a fixed frame, the inner middle part of the fixed frame is provided with a separation plate, the test paper is arranged in the fixed frame at the rear side of the separation plate, and the sampling apparatus is arranged at the inner top of the top support. The sewage sampling and detecting apparatus has the effects that the sewage is uniformly dropped onto the test paper, the sponge can prevent the direct-flow sewage from being discharged onto the test paper to cause the inaccuracy in detection, the error is reduced, the neutralization proportion of an acid-alkali substance and the sewage can be determined, the up-to-standard emission of the sewage is facilitated, the apparatus is convenient to fix, and the fixed frame is convenient to remove and clean.

The invention discloses a method for detecting a moving target. The method comprises the following steps of (a), reading in a video frame, (b), preprocessing the video frame and enabling the video frame to become a gray level image frame, (c), judging whether the image frame is a first frame or not, if yes, building a GMM, and if not, carrying out the step (d), (d), processing the image frame, and obtaining characteristics of the moving target; (e), fusing the characteristics and obtaining image information of the moving object, (f), computing pixel points of the moving object to obtain the mass center of the moving object, and storing the position, in the frame, of the moving object, (g), comparing the mass center with a set threshold value, judging whether the mass center changes or not between two frames, if the mass center does not change, carrying out the step (i), and if the mass center changes, carrying out the step (h), (h), carrying out morphological processing and updating the GMM, (i) carrying out the morphological processing and not updating the GMM, (j) outputting the detection result of the current frame. The method can solve the problem that detection is not accurate when the moving object keeps static for a long time or when the moving object moves slowly, and is particularly suitable for detecting moving objects under the sea.

The invention discloses an auxiliary device for brain examination in the neurology department. The device comprises a base, a U-shaped neck pillow and a mandible clamping rotation mechanism, wherein the mandible clamping rotation mechanism comprises a supporting part, an arc-shaped clamping part and a rotating part, the arc-shaped clamping part comprises a clamping fixing plate and a first arc-shaped clamping plate and a second arc-shaped clamping plate which are adapted to the human mandible, the clamping fixing plate is provided with a rack, the rotating part comprises a second telescopic part and a rotation driving part, the rotation driving part is arranged on the base through a slide rail, the rotation driving part is provided with a tooth groove, and the rack is meshed with the toothgroove. The auxiliary device for the brain examination in the neurology department has the advantage that the first arc-shaped clamping plate and the second arc-shaped clamping plate which are adapted to the human mandible are arranged, thereby avoiding the problems that the fixation is inconvenient due to injuries and the like and the head detection is inaccurate due to the fact that the clamping device covers a part of the head which are caused by the fact the face or temple of a patient is directly fixed in the prior art.

The invention relates to a data processing technology, and discloses a data exception detection method, which comprises the following steps of: obtaining a standard training data set containing missing data and an exception detection model framework containing a variational lower limit function; adjusting the variational lower limit function by utilizing the missing data to obtain an optimized variational lower limit function; training an anomaly detection model framework by utilizing the standard training data set to obtain an anomaly detection model; detecting the to-be-detected data set byusing the anomaly detection model and obtaining a reconstruction probability of the to-be-detected data; and if the target to-be-detected data of which the reconstruction probability is greater than or equal to the reconstruction threshold exists, determining that the target to-be-detected data is abnormal data. The invention further provides the data exception detection device, electronic equipment and a computer readable storage medium. In addition, the invention also relates to a blockchain technology, and the standard training data set can be obtained from the nodes of the blockchain. According to the invention, the efficiency and accuracy of KPI anomaly detection can be improved.

The invention relates to a sampling module and an outdoor water quality monitoring device thereof. The sampling module comprises a sampling support, which is fixedly arranged on the top surface of a second partition plate and located between a first partition plate and the second partition plate. A water diversion ring is fixed in the sampling support; a drainage groove is formed in the inner sideof the water diversion ring, and the inner side of the water diversion ring is provided with a switching disc in a sealed and circumference manner. A first drainage channel and a second drainage channel are formed in the inner side of the switching disc; one end of the second drainage channel communicates with the top of the first drainage channel; the other end of the second drainage channel runs through the switching disc; the first drainage channel and the switching disc are coaxial, and the bottom of the first drainage channel and the top of a water conduit are assembled in a circumferentially-rotating and sealed mode; the water conduit is internally of a hollow drainage inner pipe; the bottom of the drainage inner pipe communicates with one end of a drainage pipe and one end of a water inlet pipe; the other end of the drainage pipe is led out of a housing and is lower than the lowest positions of the bottom plate and the drainage inner pipe; the other end of the water inlet pipeis sequentially communicated with a first one-way valve and a water pump and then, communicated with a water inlet head; and one side of the water inlet head is communicated with the water inlet pipe.

The invention relates to the technical field of chip testing, in particular to chip test equipment based on double integrating spheres and a test method. The equipment comprising an automatic supply device, an automatic alignment device, a test device and a storage device which are sequentially arranged along a chip transmission direction; the test device comprises a rotating disc, which is provided with at least two test stations which are oppositely arranged; a driving structure, which is arranged on one side of the rotating disc and comprises a support, a driving piece connected with the support and a sliding rail connected with the support in a sliding mode, wherein two mounting stations are arranged on the support side by side; a first integrating sphere and a second integrating sphere, which are arranged on the two mounting stations respectively, wherein the first integrating sphere or the second integrating sphere is aligned with the test station between the two mounting stations under the action of the driving piece, and the testable maximum power of the first integrating sphere and the testable maximum power of the second integrating sphere are different. According to the chip test equipment based on the double integrating spheres and the test method, chips with different powers and wavelengths can be measured at the same time, and the test efficiency is high.

The invention discloses a test box special for pre-assembled quick connectors and cables. The test box comprises a shell which comprises a box body and a box cover, a power source joint, a cable socket, an indicating lamp, a cable triphase joint and a conversion switch are arranged on the box cover, the power source joint is coupled with an outside power source, the cable socket and the cable triphase joint are both used for inserting connection with a to-be-tested cable, the power source joint comprises a null line joint coupled with an outside null line and a live line joint coupled with an outside live line, and the indicating lamp, the cable triphase joint, the cable socket and the conversion switch are mutually connected serially between the null line joint and the live line joint. By arranging the indicating lamp, the cable triphase joint, the cable socket and the conversion switch on the box cover, parts can be provided for cable testing effectively; compared with the prior art of adopting a mode of testing through a multimeter, the test box has the advantage of being simpler and more accurate.

The invention discloses a method for detecting dimethyl trisulfide in beer. The method comprises the following steps of 1, an apparatus connection process, 2, an apparatus parameter arrangement process, 3, a standard curve drawing process comprising preparing dimethyl trisulfide having a concentration of 99% into a standard solution having a concentration of 5mg / L, adding 40 microliters of the standard solution, 80 microliters of the standard solution, 120 microliters of the standard solution, 160 microliters of the standard solution, 200 microliters of the standard solution and 240 microliters of the standard solution respectively into 40mL of beer, putting the beer with the standard solution on a sample disk of a purge-trap automatic sampler, carrying out detection by an apparatus, and drawing a standard curve with concentration values as horizontal coordinates and peak areas as vertical coordinates, and 4, a beer sample detection process comprising putting 40ml of a beer sample to be detected into a container having an appropriate volume, adding 0.5ml of a chemical defoamer (diluted with water according to a ratio of the chemical defoamer to water of 1: 5), uniformly mixing, putting the beer sample on the sample disk of the purge-trap automatic sampler, carrying out detection analysis by the apparatus, and calculating dimethyl trisulfide content of the beer sample according to the standard curve. The method realizes detection of dimethyl trisulfide in beer and further promotes the improvement of beer quality.

The invention discloses a terminal mobility state detection device and method, and the device and the method are used for solving the problem that the judgment of an existing terminal mobility state detection method on the mobility state of a user terminal is inaccurate under a heterogeneous network. The device comprises a timing lead recorder, a timing lead variable calculator and a mobility state judging device. The method comprises the following steps that (1) a broadcast message of a community is received; (2) the timing lead is recorded; (3) the variable of the timing lead within the current recording cycle is calculated; (4) the mobility state of the terminal is judged; and (5) switching parameters are set. According to the terminal mobility state detection device and method, the mobility state of the terminal can be detected accurately and quickly, so that the switching is executed more timely, and the purpose of reducing the switching failure rate is achieved.

The invention relates to a text detection method and device, a computer device and a storage medium. The method comprises the steps of obtaining a to-be-detected picture; extracting picture features of the to-be-detected picture based on different scales; determining character related information of each character in the to-be-detected picture corresponding to each scale according to the picture characteristics of each scale; and integrating the character related information corresponding to each scale to obtain a character detection result of each character in the to-be-detected picture. According to the method, character detection is realized by extracting picture features from different scales, and the method can adapt to characters of different scales in a natural scene, so that the problem of inaccurate text detection caused by inconsistency of picture sizes and the like is avoided.

The invention discloses a bottleneck defect detecting method and a detecting device. The bottleneck defect detecting method comprises following steps: a reflective light ring formed by a bottleneck is subjected to accurate positioning; after accurate positioning, real-time cutting of the reflective light ring in to a plurality of small areas is carried out; it is determined that whether the white pixel value of each small area is in a small area white pixel value threshold range, if the white pixel value of a small area is in the small area white pixel value threshold range, the small area is qualified, otherwise, the small area is unqualified; it is determined that whether all the small areas are qualified small areas, if all the small areas are qualified small areas, the bottleneck is qualified, otherwise the bottleneck is unqualified. The detecting device comprises a light emission unit, a camera, and a processing unit; light emitted by the light emission unit irradiates the bottleneck so as to obtain the reflective light ring; the camera is used for capturing the reflective light ring; and the processing unit is used for evaluating the reflective light ring and determining that whether the bottleneck is qualified. The bottleneck defect detecting method and the detecting device are used for processing the reflective light ring of the bottleneck; bottleneck defect detection is realized; detection speed is large; and accuracy is high.

The invention discloses a cleaning mechanism and an outdoor water quality monitoring device thereof. The cleaning mechanism comprises a sweeping motor and a sweeping brush. The sweeping motor is mounted on a first partition plate, the sweeping output shaft of the sweeping motor penetrates the first partition plate and then is fixedly assembled with a first gear, the first gear and a second gear are in meshing transmission, the second gear is fixed to a sweeping cylinder in a sleeving mode, the other end of the sweeping cylinder penetrates a second partition plate, a third partition plate and abottom plate and then can be circumferentially and rotationally assembled with a supporting plate, and the sweeping cylinder further sleeves a guide cylinder and can circumferentially rotate relativeto the guide cylinder; the sweeping cylinder is in circumferential rotation and sealed assembly with the first partition plate and the second partition plate, and reciprocating threads are arranged on the portion, located between the third partition plate and the supporting plate, of the sweeping cylinder; the reciprocating threads and reciprocating protrusions are clamped and assembled in a sliding mode, and the reciprocating protrusions are arranged on the inner side of a magnet ring; the magnet ring is fixed to the top face of a scrubbing ring, countless first bristles are fixed to the outer wall of the scrubbing ring, and the first bristles can be tightly attached to the outer walls of probes.

The invention provides a flow detection device, a flow control system and a flow detection method, belongs to the technical field of semiconductor process manufacturing. The device and the system canat least partially solve the problems that an existing flow detection device is inaccurate in gas flow detection and slow in response. According to the flow detection device, the device is used for detecting flow in a gas channel. The gas channel comprises an upstream channel and a downstream channel which are connected with each other. A throat is formed at the joint of the upstream channel and the downstream channel. The cross sectional area of the throat is smaller than that of any one of the upstream channel and the downstream channel. The flow detection device comprises a first pressure test unit used for measuring a first pressure value of the upstream channel; a second pressure testing unit, used for measuring a second pressure value of the downstream channel; and a flow calculationunit, respectively connected with the first pressure test unit and the second pressure test unit so as to obtain a corrected flow value according to the first pressure value and the second pressure value.

The invention relates to the technical field of robot detection, in particular to a simple robot precision detecting device and method. The device comprises a fixing base and a load block which is used for being installed at the tail end of a robot. The fixing base is provided with an X-axis dial indicator, a Y-axis dial indicator and a Z-axis dial indicator, wherein the axis of the measuring head of the X-axis dial indicator, the axis of the measuring head of the Y-axis dial indicator and the axis of the measuring head of the Z-axis dial indicator are perpendicular to one another; when the robot drives the load block to move to the fixing base, the load block separately abuts against the measuring head of the X-axis dial indicator, the measuring head of the Y-axis dial indicator and the measuring head of the Z-axis dial indicator. The simple robot accuracy detecting device and method have the advantages that the load block is driven by the robot to move to the fixing base, the three faces, perpendicular to one another, of the load block abut against the three dial indicators respectively, readings of the dial indicators are taken, the moving precision of the arms of the robot is detected through multimetering, the structure is simple, the operation is convenient, and the cost is low.

The invention relates to a formaldehyde detection method. The method comprises the following steps of acquiring a first detection value provided by a first sensor, wherein the first sensor is used fordetecting the formaldehyde content in air; acquiring a second detection value provided by a second sensor, wherein the second sensor is used for detecting the non-formaldehyde interference gas content in the air; and judging a threshold interval where the second detection value is located, and obtaining a formaldehyde detection result according to the threshold interval, the second detection value and the first detection value. According to the threshold interval, the second detection value and the first detection value, the formaldehyde detection result is obtained, so that the detection result is more accurate and the problem that detection is inaccurate due to the fact that the first detection value is directly adopted as the formaldehyde detection result is effectively avoided. The invention further relates to a formaldehyde detection device and an air purifier.

The invention discloses a device for detecting repair compressive strength of a CIPP pipeline. The device comprises a connecting block, wherein a supporting box is fixed on the connecting block; a baffle is fixed in the supporting box; springs are arranged on both sides of the baffle; a sliding block is arranged at one end of the springs; a roller wheel is rotatably arranged at the end of the sliding block; an installation box is fixed at one end of the supporting box; a servo motor is fixed in the installation box; a first bevel gear is fixed on an output shaft of the servo motor; a second bevel gear is in transmission connection with the first bevel gear; a first screw rod is in transmission connection with the second bevel gear; a first transmission nut is in transmission connection with the first screw rod; a first connection frame is in transmission connection with the first transmission nut; a first top block is fixed at the end of the first connecting frame; a pressure sensor isarranged between the first top block and the first connecting frame; a supporting mechanism is arranged at one end of the installation box. By adopting the structure, the detection of the compressivestrength is realized, the structure is simple, and the operation is easy.

The invention relates to the field of bottle blank manufacturing producing, in particular to a bottle body imaging device used for bottle blank detection. The device comprises a transmission mechanism, a detecting mechanism and an output mechanism; the detecting mechanism comprises a rotating assembly, a clamping assembly and a detecting assembly, the clamping assembly comprises a limiting part and clamping parts, in the process that the clamping parts are driven by the rotating assembly to move, guide downward moving is limited through the limiting part, meanwhile, air bags on the lower endsof the clamping parts are driven to stretch into bottle blanks, the air bags clamp the bottle blanks in an inflation expansion manner and then carry out transferring, through an imaging part, the airbags serve as bottom colors, the bottle blanks are subjected to photographing detection, through the output mechanism, the detected bottle blanks are subjected to quality good and inferior-quality product corresponding output, the air bags extend into the bottle blanks for fixing in an expansion manner, meanwhile, the air bags serve as light reflecting plates, plane single-layer imaging detectionis achieved, meanwhile, automatic rotation in the bottle blank transferring process is combined, and the technical problem that in the prior art, the detection efficiency is low is solved.

The invention discloses an on-load voltage regulating oil quality online monitoring apparatus, which comprises a sampling pipe, a sampling pump, a detection chamber, an oil product sensor, a wirelessmodule and a processor, wherein the sampling pipe comprises a support pipe and a stretching sampling hose arranged in the support pipe, the side surface of the support pipe is provided with a plurality of first oil inlet hole arranged at equal intervals, both ends of the end of the stretching sampling hose are provided with second oil inlet holes, the top portion of the stretching sampling hose issealed by a plunger, the sampling pump injects to-be-detected voltage regulating oil into the detection chamber through the stretching sampling hose, the oil product sensor is arranged in the detection chamber, the oil is discharged out of the detection chamber through an oil discharge port, and the oil product sensor, the wireless module and the sampling pump are respectively connected to the processor. According to the present invention, with the on-load voltage regulating oil quality online monitoring apparatus, the voltage regulating oils at the multiple positions are sampled during the detecting so as to improve the accuracy of the detection.

The invention discloses a forced oil lubricated high-speed rolling bearing test bench. The forced oil lubricated high-speed rolling bearing test bench is composed of a base, a filter, an oil pump, an oil tank, oil pipes, tee interfaces, a motor, a coupling, a rotation shaft, flat keys, positioning shaft sleeves, bearings, a loading bearing, a test bearing, oil spray rings, bearing block lower parts, bearing block upper parts, a loading bearing block, snap rings, a round nut, bearing end covers, felt collar oil seals, a threaded loading rod, a bracket, a washer, a fastening bolt and the like. According to the forced oil lubricated high-speed rolling bearing test bench, a structure according to which two pairs of bearings are arranged side by side to support the rotation shaft is adopted; the oil pump is adopted to provide lubricating oil for the high-speed rolling bearing test bench; the filter is adopted to purify the lubricating oil; and therefore, the high-speed and stable operation of the test bench can be realized; and the cooling cyclic utilization of the lubricating oil is realized, so that the lubrication performance of the lubricating oil can be improved. Compared with an existing bearing test bench device, the device of the invention has the advantages of reliable performance in high-speed operation, convenient disassembly and simple and convenient operation, and is especially suitable for high-speed rolling bearing tests and other conditions where bearings generate a lot of heat.

The invention discloses a shifting wheel positioning device. A detecting assembly is arranged on one side of a shifting wheel which is provided with multiple detection points matched with the detection assembly. The detection points are annularly distributed on the shifting wheel and correspond to shifting wheel grooves in a one-to-one mode. A flexible assembly is arranged on one side of the shifting wheel which is provided with a positioning assembly. When the detecting assembly detects the preset detection points, the flexible assembly extends out to be matched with the positioning assembly to position the shifting wheel. The invention further discloses an intermittent filling device for a filling machine. The intermittent filling device comprises the shifting wheel and a filling assembly. The shifting wheel is provided with the shifting wheel positioning device which is used for positioning the shifting wheel to enable the filling assembly to carry out filling. The shifting wheel positioning device and the intermittent filling device for the filling machine have the advantages of being simple in structure, easy and convenient to operate, precise in positioning and the like.

The invention discloses a waste incineration power generation boiler flue gas pollutant monitoring device in the technical field of flue gas pollutant monitoring, and the device comprises a smoke exhaust pipeline, a mounting ring is arranged at the top of the smoke exhaust pipeline, a protection top is fixedly connected to the top of the mounting ring, and the front side of the smoke exhaust pipeline communicates with a detection channel. The front side of the detection channel extends to the outer side of the smoke exhaust pipeline. According to the invention, the detection probe is sent into the smoke exhaust pipeline by using a mounting block and a mounting plate, the inclined surface at the rear end of the mounting plate acts on the inclined surface at the bottom end of the first sealing plate, and the bottom of the first sealing plate slides on the upper surface of the mounting plate, so that the situation that smoke enters the exhaust pipeline in the process of pushing the detection probe into the smoke exhaust pipeline and the detection is inaccurate is prevented, and then, when the mounting plate is completely pushed into the smoke exhaust pipeline, a stop block can abut against the front side face of a second sealing plate, smoke is prevented from escaping in the detection process, and the accuracy of smoke detection by the detection probe is improved.

The invention discloses a loading force measuring device for a slope model experiment and a loading fixing method of the loading force measuring device. The loading force measuring device comprises a bracket, wherein the bracket comprises a smooth rod and a threaded rod which are mutually parallel; the bottom end of the smooth rod is fixedly arranged on a base; a horizontal plate is arranged between the top ends of the smooth rod and the threaded rod; scales are arranged on the horizontal plate; the bottom end of the threaded rod is connected with the base through a second rolling bearing; the top end of the threaded rod penetrates through the horizontal plate; a rotating disk is arranged at the top end of the threaded rod; a first rolling bearing is arranged in the position where the top end of the threaded rod penetrates through the horizontal plate; an adjusting platform is arranged on the smooth rod and the threaded rod; the adjusting platform can move in the vertical direction. Through the adoption of the structure, prestressed anchorage is carried out according to practical construction work, and the stress change of an anchor rope is measured in real time, so that stability of experimental data is guaranteed, and the anchoring effect of practical construction site and the stability condition of the slope can be accurately judged with high precision.

The invention relates to the technical field of component detection, in particular to a method of detecting zinc and selenium contents in zinc-selenium tea; by subjecting zinc-selenium tea to enclosed carbonization, dissipation of selenium and zinc in the zinc-selenium tea is effectively avoided; after the zinc-selenium tea is cooled to normal temperature, zinc-selenium vapor formed during the carbonization process is charged into a closed space, zinc and selenium in the zinc-selenium tea are never lost, and zinc and selenium detection accuracy for zinc-selenium tea is improved; in conjunction with stepwise establishment of standard curves, the standard curves are combined; a linear equation curve under the standard combined solution in the presence of zinc and selenium is established; liquid material to be detected is prepared into a liquid to be detected; changes in current in the liquid to be detected are then detected; zinc-selenium combination of the liquid to be tested is acquired in conjunction with a picture drawn in conjunction with the standard cures, detection difficulty is lowered, and detection accuracy is improved.

The invention provides a special circuit board bending resistance testing machine, which relates to the field of circuit board testing. The special circuit board bending resistance testing machine comprises a supporting table and an upper frame, the lower end of the upper frame is fixedly connected with the upper surface of the supporting table, a material table is arranged between the upper frame and the supporting table, the right side face of the material table is fixedly connected with a discharging box, the bottom face of the material table is fixedly connected with four supporting telescopic rods, and the lower end of the supporting telescopic rod is fixedly connected with the upper surface of the supporting table. According to the special circuit board bending resistance testing machine, through the arrangement of the pressing plate, the cavity, the pressure spring and the inclined plate, if the circuit board is not broken, the pressing plate is U-shaped, so that the unbroken circuit board can be stably supported upwards, and if the pressing plate is pressed downwards to break the circuit board, the supporting columns cannot stably support the circuit board, the circuit boards fall on the supporting table, and the circuit boards meeting the conditions are separated from the circuit boards not meeting the conditions.

The invention provides a magnetic suspension compressor. The magnetic suspension compressor comprises a motor main shaft (13), a first impeller (6), a backflow device (4) and an axial displacement sensor (7), wherein the first impeller (6) is installed in the backflow device (4) and arranged outside the motor main shaft (13) in a sleeving manner; the axial displacement sensor (7) is fixedly arranged relative to the backflow device (4); one side, facing the axial displacement sensor (7), of the first impeller (6) is provided with an axial detection surface (602); and the axial displacement sensor (7) can detect the axial displacement of the first impeller (6) through the axial detection surface (602). According to the magnetic suspension compressor provided by the invention, the axial position of the impeller can be directly detected, so that the control precision of a system is improved.

The invention discloses a roller gap self-learning deviation correcting method and device, and relates to the technical field of steel rolling. The method is applied to a multi-rack continuous rollingprocess, and comprises the following steps that when a current roll of strip steel passes through a last rack of a multi-rack continuous rolling machine, current rolling data of each rack in the multi-rack continuous rolling machine are acquired; on the basis of the current rolling data and a mark position of recalculated rolling force of each rack, actual rolling force of each rack is determined; a current value of a self-learning coefficient of each rack is obtained; whether the current values of the self-learning coefficients are within a preset range or not is judged, if the current values of the self-learning coefficients are within the preset range, an updated self-learning coefficient value is obtained based on the current values of the self-learning coefficients and old values ofthe self-learning coefficients; and according to the updated self-learning coefficient value, the multi-rack continuous rolling machine is controlled to carry out rolling on a next roll of strip steel. According to the roller gap self-learning deviation correcting method, the problem that roller gap setting at an abnormal situation is not accurate can be solved, and the roller gap setting precision is improved, so that the strip steel rolling quality is improved.