32results about How to "Simplify detection steps" patented technology

The invention provides a near infrared spectrum rapid evaluation method for the protein content of brown rice. The method comprises the following steps: acquiring optical signals of different varieties of brown rice under a near-infrared band and physicochemical indexes measured according to a traditional method, preprocessing the acquired optical signals by utilizing a smoothing (Savitzky-Golay) method, and constructing a brown rice protein content evaluation model based on machine learning and a characteristic band selection algorithm; effective prediction of the protein content of the brown rice is realized only through optical characteristic parameters. According to the method, the protein content of the brown rice can be predicted only by collecting the near infrared spectrum of the brown rice, and in food processing enterprises, the technology can remarkably improve the efficiency and stability of product quality monitoring, support real-time online detection and provide an efficient and rapid quality control scheme for the enterprises, so that the product consistency is improved, the waste of raw materials is reduced, and the production cost is reduced. The production benefit is improved.

The invention relates to the field of safety supervision, in particular to a food safety supervision system based on a cloud platform, and the system comprises a collection module which collects a contour diagram of a package and a morphological diagram of target food; the fitting degree analysis module is used for determining the contour coincidence degree and the edge distance according to the contour map and the form map, and determining whether the fitting degree of the target food and the package is qualified or not based on the contour coincidence degree and the edge distance; the shake risk analysis module is used for detecting the package with qualified fitting degree to obtain the deformation degree and the distribution condition of the package folds in the transportation process so as to determine whether the shake risk is qualified or not; the packaging material evaluation module is used for carrying out migration test on the package with the qualified shaking risk so as to evaluate the material safety of the package according to the migration condition of substances in the packaging material to the food; and the safety determination module determines that the target food in the package is safe food according to the fitting degree, the shaking risk and the material safety. And comprehensive guarantee is provided for food safety.

The invention discloses a clothes weight detection method of a washing machine and a related device. The method comprises the following steps: driving a driving motor of the washing machine to operate at a first speed based on a preset torque current, and obtaining a load torque of the driving motor at the first speed; performing zero clearing operation on the torque current to control the rotating speed of the driving motor to be reduced based on the first speed; in response to the condition that the speed reduction operation of the driving motor reaches a set condition, the speed variation and the time variation of the rotating speed of the driving motor are obtained; wherein the set condition comprises that the falling time from the first speed to the second speed or the rotating speed reaches a preset time threshold value; and obtaining the weight of the clothes in the washing machine based on the load torque, the speed variation and the time variation. The clothes weight detection efficiency and accuracy of the washing machine can be improved.

The present invention relates to the field of glue dispensing detection technology, and in particular to a real-time online detection method and detection system for glue hanging on a glue dispensing needle. The method includes: obtaining a step image and an end face image of a glue dispensing needle collected by a visual device; processing the step image based on an image processing algorithm to obtain the center coordinates of the needle step; mapping the center coordinates of the needle step to the needle end face image, and using the center coordinates of the needle step as the glue hanging detection positioning coordinates; calculating the outer circle radius of the needle end face, and then dividing the needle end face area on the needle end face image in combination with the glue hanging detection positioning coordinates; obtaining the width W of the glue hanging detection area, and obtaining the glue hanging detection area in combination with the center coordinates of the needle step and the outer circle radius of the needle end face; calculating the area of ​​the glue area in the glue hanging detection area, and comparing it with a preset value, and performing real-time online detection of glue hanging on the glue dispensing needle according to the comparison result, thereby simplifying the detection steps, improving the detection efficiency and accuracy, and achieving a high yield rate of glue dispensing products.

The utility model relates to the technical field of rotational molding oil tank production, in particular to an intelligent clamping device for rotational molding oil tank production, which comprises a bottom plate and an oil tank body, a clamping device is arranged at the top end of the bottom plate, a supporting block is fixedly connected to the top end of the bottom plate, and a baffle is fixedly connected to the side wall of the supporting block. The clamping device comprises a first telescopic air cylinder installed at the top end of the bottom plate, the top end of the first telescopic air cylinder is fixedly connected with a first installation block, a rotating motor is fixedly installed at the top end of the first installation block, the output end of the rotating motor is fixedly connected with a second installation block, and a second telescopic air cylinder is fixedly installed on the side wall of the second installation block. According to the intelligent clamping equipment for rotational molding oil tank production, the detection steps can be simplified, the detection efficiency can be improved, meanwhile, the effect of rapidly transferring the oil tank body can be achieved, the production efficiency of the oil tank body can be improved, and actual use is facilitated.

The application provides an optical detection system and a detection method, and relates to the field of optical detection. The system comprises a first detection mechanism, a second detection mechanism and a third detection mechanism cooperating with a moving mechanism. The first detection mechanism, the second detection mechanism and the third detection mechanism are distributed around a preset path and correspond to different detection positions respectively. The moving mechanism is configured to place a mask and drive the mask to move along the preset path. The first detection mechanism, the second detection mechanism and the third detection mechanism are respectively used for optical detection of the inner wall surface of a support frame, the front and back surfaces of a glass plate, the front surface of a protective film, the side end of the glass plate and the outer wall surface of the support frame. The application can continuously detect multiple regions of the mask, thereby simplifying the overall detection steps of the mask, improving the overall detection efficiency of the mask, and alleviating the problem of insufficient stability of the detection result caused by the influence of differences in clamping precision and environmental factors due to single-path multi-detection.

This invention discloses a method and kit for determining the full-length RHD and RHCE mRNA based on third-generation sequencing, belonging to the field of biotechnology. It addresses the limitations of existing technologies in determining the full-length RHD and RHCE mRNA, detecting low-level splice variants, and relatively quantifying transcripts. The method includes: mRNA extraction and cDNA reverse transcription; PCR amplification; third-generation sequencing library construction and sequencing; sequencing data filtering and quality control; and transcript expression analysis. The kit includes primers for simultaneously amplifying the full-length RHD and RHCE transcripts. This invention successfully utilizes long-chain single-molecule sequencing technology to sequence the full-length transcripts of the RHD and RHCE genes, detecting multiple transcripts of the RHD and RHCE genes in RhD-positive and Del-type samples, and enabling relative quantification of the expression levels of different transcripts, providing a new method for revealing the molecular mechanisms of Rh blood type variations. The simultaneous detection method of this invention can obtain results for two genes in one step, simplifying the experimental procedure and enriching the detection results.

The present invention provides a method for rapidly detecting bacterial, fungal and mycoplasma contamination during the culture of mesenchymal stem cells based on fluorescent quantitative PCR, and belongs to the technical field of microbial detection. A DNA-specific fragment for detecting bacteria, fungi and mycoplasma includes a DNA fragment with a nucleotide sequence such as that shown in SEQ ID NO:1 or a DNA fragment with a length of more than 50% cut off on the basis of SEQ ID NO:1. Based on the DNA-specific fragment, the present invention designs a universal primer for detecting bacteria, fungi and mycoplasma. qPCR detection using the universal primer can rapidly and specifically detect whether there is bacterial, fungal and mycoplasma contamination in mesenchymal stem cell preparations, and the method is simple and accurate, takes less time than conventional culture methods, and the results can be qualitatively analyzed.

The invention discloses a salmonella H: i epitope specific monoclonal antibody and application thereof, the salmonella H: i epitope specific monoclonal antibody is secreted by hybridoma cells with the preservation number of CCTCC NO: C202645, and the antibody has the advantages of high titer and strong specificity. According to the blocking ELISA detection kit constructed by the antibody and the detection method of the blocking ELISA detection kit, the antibody containing H: i antigen epitope salmonella in infected animal serum can be specifically detected, the antibody does not react with antibodies containing no H: i antigen epitope salmonella and non-salmonella, the sensitivity, specificity and stability are good, and the detection method is simple and convenient. And a new method is provided for direct serological detection of H: i antigen epitope-containing salmonella infection of mouse typhimurium, kafenkii and the like.

The invention provides a rapid detection method for non-pralazone illegally added in food, and belongs to the technical field of medicine detection. The method comprises the following steps: respectively carrying out secondary extraction on a food sample by adopting a strong polar extraction agent and a non-polar extraction agent to obtain extracted supernate; removing the non-polar extraction agent in the supernate by adopting a nitrogen blowing method; eluting the supernate subjected to nitrogen blowing treatment by adopting a strong polar solvent to prepare a to-be-detected solution; and sequentially adding the metal sol and the inorganic salt flocculant into the to-be-detected solution, uniformly mixing, and detecting by using a Raman spectrometer. The detection method provided by the invention has the advantages of high sensitivity, low detection limit and low cost, and can realize rapid detection of non-pralazone illegally added in food.

The utility model discloses a two-way measuring caliper which comprises a supporting rod and shells symmetrically arranged at the two ends of the supporting rod, push-pull rods, opening mechanisms and displacement sensors are arranged in the two shells, the opening mechanisms provide pushing force for the push-pull rods at the two ends to get close to each other, the two-way measuring caliper further comprises a plurality of sets of supporting arms arranged on the periphery of the supporting rod, and every two sets of supporting arms form one set. The outer ends of the two supporting arms in the same group are hinged to one sides of the inner ends of the two shells respectively, the inner ends of the two supporting arms are hinged and provided with rolling wheels, the inner wall of a well to be measured can push the rolling wheels to be close to the supporting rods so as to push the push-pull rods at the two ends to be away from each other, and the displacement sensors are used for detecting displacement data of the corresponding push-pull rods. By arranging the structure with the two symmetrical ends, the caliper can measure the diameter of a to-be-measured well in the process of going up to the well or going down to the well, and compared with a traditional caliper which can only measure the diameter in one direction, the working efficiency is improved, and the detection steps are simplified.

The invention belongs to the technical field of environmental pollution detection, and discloses a method and a system for detecting multiphase chlorinated hydrocarbon pollutants in soil and underground water, the method comprises the following protective cover: S1, arranging a multiphase chlorinated hydrocarbon pollutant concentration detection experiment device; s2, constructing a multiphase detection data analysis model; s3, carrying out a multiphase detection experiment; s4, detecting an actual sample; the system comprises a cloud server, a management terminal and at least one set of multiphase chlorinated hydrocarbon pollutant concentration detection experiment device. By improving the multiphase chlorohydrocarbon pollutant concentration detection experimental device and constructing the multiphase detection data analysis model, synchronous detection of the multiphase occurrence concentration of chlorohydrocarbon in soil and groundwater environments can be realized, and the soil chlorohydrocarbon pollution level can be evaluated more comprehensively; the method can be widely applied to identification of potential risks of soil pollution and accurate prevention and control of soil chlorinated hydrocarbon pollution.

The application discloses a detection method for detecting drug amount based on solid phase microextraction and real-time analysis mass spectrum, which comprises the following steps: preparing a solid phase microextraction head by using a coating material, preparing a standard sample to form a standard curve solution, detecting the standard curve solution by solid phase microextraction and real-time direct analysis mass spectrum, obtaining a mass spectrum diagram of the standard curve solution, and then obtaining a standard curve equation of the standard curve solution; obtaining a peak area value of a to-be-detected sample by solid phase microextraction and real-time direct analysis mass spectrum, and substituting the peak area value into the standard curve equation to obtain the concentration of corresponding drugs. By setting the method process, the detection steps of the application are obviously simplified, the constant volume, detection and calculation operations can be carried out on site according to actual needs, the operation mode and operation site are flexible, and the beneficial effect of improving the detection efficiency can be achieved.

The application discloses a probe card analyzer, and belongs to the field of semiconductor equipment, comprising a base, the base is provided with a turnover plate for mounting a probe card, the base is provided with a lifting mechanism for lifting the turnover plate and a rotating mechanism for rotating the turnover plate, the base is provided below the turnover plate with a detection mechanism, the detection mechanism comprises a sensor group for contacting the probe, the base is provided with an X-axis displacement mechanism, a Y-axis displacement mechanism and a Z-axis displacement mechanism for controlling the movement of the detection mechanism along a three-dimensional coordinate system, the detection mechanism is connected to the Z-axis displacement mechanism, the base is provided above the turnover plate with a first magnifying observation piece, and the base is provided with a position adjusting mechanism for sliding the first magnifying observation piece. The application has the effect of improving the detection efficiency of the probe.

This application relates to an ultrasonic welding quality inspection method, apparatus, device, and storage medium. The method includes acquiring information about the object to be welded; acquiring welding condition information based on the object information, wherein the object information includes the object material, hardness, and thickness; triggering a welding head power test command based on the welding condition information; acquiring the welding head power test result; triggering an ultrasonic wave generation command based on the welding head power test result; acquiring energy absorption information of the object to be welded; acquiring a welding quality value based on the energy absorption information; and triggering a parameter adjustment command for adjusting the output power based on the welding quality value. This application has the effect of accurately detecting the welding quality during the welding process and thereby adjusting the parameters of the welding machine in real time.

The present application relates to the technical field of anti-scaling detection, in particular to a kind of enamel steel plate anti-scaling detection device and detection method, including hydrogen permeation cell, hydrogen permeation cell includes left electrolytic cell and right electrolytic cell, and the left electrolytic cell and right electrolytic cell are all opened with permeation mouth, the left electrolytic cell and right electrolytic cell are all fixedly connected with clamp, sealing ring one is arranged on the clamp, and two clamps are used to clamp steel plate, the detection assembly is set on hydrogen permeation cell device in the present application, when two clamps are clamped steel plate, fill water in detection cell, at this time, pressure is applied to two sides of piston respectively, if sealing ring one is not sealed with steel plate at this time, bubble will be generated at sealing place, whether bubble is generated is observed to judge the sealing effect of the sealing ring one on both sides of steel plate, reduce the detection time, and other solutions do not need to be added to the left electrolytic cell and right electrolytic cell, thereby avoiding the cleaning step before subsequent test, facilitate the operation step, improve the detection rate of sealing property.

The invention discloses a cast-in-place concrete pile sediment thickness detection device, and relates to the field of pile foundation construction, the cast-in-place concrete pile sediment thickness detection device comprises a rack, a measuring rope, a measuring needle, a measuring cake, a winding and unwinding mechanism, a guide wheel, a limiting mechanism and a control mechanism; a cavity is formed in the measuring needle, the guide wheel is rotationally installed in the cavity through a rotating shaft, two first channels allowing the measuring rope to penetrate through are formed in the top end of the measuring needle, the cavity in the measuring needle is communicated with the outside through the channels, the measuring cake is arranged at the top end of the measuring needle, and a second channel allowing the measuring rope to penetrate through is formed in the measuring cake. According to the cast-in-place concrete pile sediment thickness detection device, the sediment thickness can be measured through one-time measurement by achieving synchronous falling and lifting of the measuring needle and the measuring disc, the detection steps are simplified, the detection efficiency is improved, the limiting mechanism is automatically switched to the limiting state when the measuring needle makes contact with the bottom of a cast-in-place pile hole, and the part, connected with the measuring disc, of the measuring rope is clamped; errors caused by multiple times of measurement are avoided, and the measurement precision is improved.

The invention discloses a front and back defect detection method for a ceramic substrate without flipping based on multi-roller transmission, which relates to the technical field of ceramic substrate surface defect detection, and comprises the following steps: obtaining the spacing and diameter of rollers used for transmission; selecting and setting a detection position from the gaps between the rollers; the front and back defect detection method for a ceramic substrate without flipping based on multi-roller transmission analyzes the change in the surface height of the ceramic substrate and the up and down fluctuation of the ceramic substrate caused by the contact or separation of the protrusions or depressions at the defective parts of the ceramic substrate with the rollers when the ceramic substrate moves on the multi-rollers by a laser interferometer, so as to determine the surface defects of the ceramic substrate when it is transported by the multi-rollers, so as to eliminate the influence of the up and down fluctuation of the ceramic substrate caused by the contact or separation of the protrusions or depressions at the defective parts of the ceramic substrate with the rollers during the analysis, so that the detection is suitable for multi-roller transmission.

The invention discloses a melamine hapten, an artificial antigen and an antibody as well as a preparation method and application thereof, and relates to the technical field of immunochemistry and food safety detection. The hapten is prepared from 2-chloro-4, 6-diamino-1, 3, 5-triazine and 8-amino caprylic acid through a reaction, the artificial antigen is prepared from the hapten, N, N '-dicyclohexylcarbodiimide (DCC) and N-hydroxysuccinimide (NHS), and the antibody is prepared from an animal immunized by the artificial antigen. The antigen and the antibody can be applied to preparation of a melamine colloidal gold immunochromatography test strip, and can be used for rapidly and sensitively detecting melamine residues in animal-derived food.

The invention discloses a clock frequency detection method, which comprises the following steps of: 1, preparing frequency detection, 11, determining the digit of a frequency division counter according to the frequency of a clock signal to be detected and the frequency of a working clock, the frequency of the clock signal after frequency division is required to be 1 / 2, 1 / 4 or 1 / 2 of other smaller even number of the frequency of the working clock; step 12, beating two beats on the rising edge of the work clock of the clock signal after frequency division to obtain a new frequency division signal; 2, calculating a counting threshold value of the zero clearing counter, and setting a counting value of the zero clearing counter according to the counting threshold value; 3, starting a detection counter to count; and step 4, detecting whether the new frequency division signal obtained in the step 1 loses frequency or not. According to the method provided by the invention, whether a clock signal with a certain frequency exists or not can be accurately detected under the condition of not using instruments and meters.

The invention relates to a method for evaluating a puree tissue structure and viscoelasticity based on light absorption and light scattering characteristics. The method comprises the following steps: acquiring light absorption and light scattering signals of apple puree in visible-near-infrared and short-wave near-infrared bands under different heat treatment conditions; after collected optical signals are preprocessed through standard normal transformation and a Savitzky-Golay smoothing method, an evaluation model of the apple puree tissue structure (particle area and particle perimeter) and the viscoelasticity (viscosity and viscoelasticity) is constructed based on a partial least square regression algorithm, and effective prediction of the apple puree tissue structure and the viscoelasticity is achieved only through optical characteristic parameters. According to the method, the tissue structure and viscoelasticity of the puree under different heat treatment parts can be evaluated only by acquiring light absorption and scattering signals of the puree, and technical support is provided for a puree processing enterprise to realize rapid, efficient and stable product texture quality monitoring.

The application relates to the technical field of traditional Chinese medicine detection, in particular to a thin-layer chromatography detection method of a traditional Chinese medicine preparation for treating mammary gland hyperplasia, which is a rannuclear mass-resolving tablet. The thin-layer chromatography detection method comprises extracting the rannuclear mass-resolving tablet by using dichloromethane to prepare filter residue and a first sample solution, which is used for comparison with angelica sinensis; extracting the filter residue by using n-butanol to prepare a second sample solution, which is used for comparison with epimedium; and extracting the rannuclear mass-resolving tablet by using methanol to prepare a third sample solution, which is used for comparison with astragalus and epimedium. The method simplifies operation steps, makes up for the defect that some medicines cannot be identified, enriches detection information, has strong speciality, is simple in operation, and has wide adaptability.

The invention relates to a probe, a primer pair, a kit and a detection method for beta-thalassemia gene detection. The detection probes are selected from one or more of P1 to P6 of which the sequences are as shown in SEQ ID NO. 9 to SEQ ID NO. 14. An amplified fragment of the detection primer pair can be specifically combined with a detection probe. The detection primer pair is selected from one or more of a primer pair 1, a primer pair 2, a primer pair 3, a primer pair 4 and a primer pair 4, wherein the sequences of the primer pair 1, the primer pair 2, the primer pair 3 and the primer pair 4 are shown as SEQ ID NO.1 to SEQ ID NO.8. According to the invention, the detection of eight mutation sites in the beta-thalassemia gene can be realized.

The present invention provides a sensor preparation method and a kidney disease marker detection method, wherein a kidney disease marker sensor for a specific kidney disease marker is formed by continuously introducing hydroxyl, amino, and aldehyde groups into a microchannel on the surface of a silicon nanowire field effect transistor biosensor to covalently connect probe molecules, and after the kidney disease marker is captured by the probe molecule, the kidney disease marker sensor applies a set voltage, and after the current is stable, the detection current is recorded, and according to the monitoring current of a kidney disease marker solution with a known set concentration and a kidney disease marker solution to be tested, it is determined whether the kidney disease marker is contained in the kidney disease marker solution to be tested and the kidney disease marker concentration is calculated. The detection steps are simplified and the detection accuracy is improved.

The invention provides an integrated multi-heavy metal detection microsensor which can be applied to the technical field of water quality detection sensors. The sensor comprises a substrate, a thin-layer detection cavity structure, N functionalized electrode pairs, a common counter electrode and a common reference electrode, and any one functionalized electrode pair, the common counter electrode and the common reference electrode form a four-electrode system; the thin-layer detection cavity structure comprises a groove, a sample inlet and a sample outlet; a cavity is formed between the groove and the substrate; a sample to be detected flows into the cavity from the sample inlet and flows out from the sample outlet; one end of the four-electrode system is located in the cavity. A plurality of four-electrode systems with micro-area pH regulation and control capability are prepared at different positions of the detection pool, so that the effect of presenting different pH solution environments in different micro-areas in the same detection pool is realized, and the simultaneous detection of the concentrations of various heavy metal pollutants in the same detection pool is realized.

The utility model relates to the technical field of automobile engineering, and discloses an automobile air conditioning system simulator which mainly comprises a pressure detection device, a refrigerant processing device, a filtering device, a switch valve and an oil bottle assembly. The pressure detection device dynamically monitors the pressure of the system, and the refrigerant processing device simulates the real working condition according to the refrigeration cycle principle, so that the refrigerant processed by the filling and recycling machine is subjected to a complete cycle process. The filter device maintains the purity of the refrigerant, and ensures that the test environment is close to reality. The switch valve controls refrigerant flow and flow direction, the oil bottle guarantees stable operation of the compressor, and the two cooperate to provide a stable basis for performance testing. According to the utility model, performance indexes such as recovery efficiency, filling precision and the like of the refrigerant filling and recovering machine can be comprehensively tested, the test cost of the refrigerant filling and recovering machine is reduced, and manpower, material resources and time costs are reduced.

The utility model discloses a cable insulation layer defect detection device, and particularly relates to the technical field of cable insulation detection, the cable insulation layer defect detection device comprises a box body, the inside of the box body is rotatably connected with a first roller and a second roller from left to right, and the height of the first roller is consistent with that of the second roller; a detection probe is connected to a position, close to the second roller, of the top surface of the inner wall of the box body; a shell is connected to the front side of the box body, a driving mechanism is arranged in the shell, two rollers in the box body are placed above a cable, a motor is started, a second gear is driven to rotate, then a first gear, a second shaft rod and a first roller on the outer side of the second shaft rod are driven to rotate, meanwhile, a first belt wheel is driven to rotate, and under the traction effect of a belt, the first belt wheel is driven to rotate. And the first shaft rod and the second roller on the other side are driven to rotate, so that the rollers on the two sides synchronously rotate, the whole device moves along the upper part of the cable, and meanwhile, the defect detection of the insulating layer of the cable is completed through the detection probe.

The invention discloses a test device and method for photoelectronic device preparation, and relates to the technical field of photoelectronic device optical tests.The test device comprises a plurality of photosensitive diodes installed in a test box, and further comprises a servo motor fixedly installed on the side wall of the test box, the output end of the servo motor is fixedly connected with a driving shaft, a connecting frame is fixedly mounted on the side wall of the driving shaft, and a plurality of mounting shafts are fixedly mounted on the connecting frame; comprising the following steps: S1, switching on a power supply of test equipment for photoelectronic device preparation, debugging a servo motor, observing whether the servo motor operates normally, and processing in time if abnormity is found; the detection device has the advantages that by utilizing the reciprocating swing action of the mounting block, the spectral response detection of the photosensitive diode and the sensitivity detection of different incident angles can be automatically and continuously completed, and the detection efficiency is greatly improved while the detection range is widened.

The application relates to a detection mechanism, method, device and system of a fuel evaporation system, wherein the detection mechanism of the fuel evaporation system comprises a carbon tank, a valve part and a vane pump which are communicated with the carbon tank respectively; the valve part is provided with an intake manifold communication port and a fuel tank communication port; the vane pump comprises an impeller and a rotating speed sensor which is used for detecting the rotating speed of the impeller. The detection mechanism of the fuel evaporation system can improve the leakage detection efficiency of the fuel evaporation system, simplify the overall structure and improve the detection accuracy.

The utility model belongs to spline connection detection technical field relates to a device for detecting spline connection disc end surface tooth symmetry, include: work piece placing base, tensioning cover mandrel, tensioning cover, detection reference column, detection block, tensioning cover mandrel rotation connects work piece placing base, tensioning cover is covered and is established on the outer circumference of tensioning cover mandrel, and tensioning cover outer cover is equipped with spline connection disc, the boss of detection block is matched with spline connection disc end surface tooth groove, the top of detection reference column is equipped with detection reference groove, the utility model discloses through detection block and leads out the detection interface of spline connection disc end surface tooth, provides the contrast basis of detection device through detection reference column and blocks detection block, and the symmetry error of spline connection disc end surface tooth can be detected through the contrast of before and after detection value, therefore the utility model can effectively eliminate the clearance between spline mandrel and spline connection disc, and the accuracy of detection has been improved.