108results about How to "Realize online detection" patented technology

The invention discloses a lithium battery health state assessment method and system, and the method comprises the steps: collecting the terminal voltage data and current data of a lithium battery at each moment in a discharge period in real time, so as to obtain a DC impedance estimation value at each moment; obtaining a discharge working condition of the lithium battery at each moment to screen a plurality of direct current impedance effective values, and constructing a plurality of direct current impedance value real-time sequences; calculating a direct-current impedance sequence estimation value of each direct-current impedance value real-time sequence; segmenting the plurality of direct-current impedance sequence estimated values and a preset discharge direct-current impedance data table according to the discharge working condition, and calculating a direct-current impedance average value and a direct-current impedance reference average value in each segment, and determining the health state of the lithium battery according to the DC impedance average value and the DC impedance reference average value, thereby realizing online evaluation of the health state of the lithium battery.

The invention discloses a crystallinity detection method and related equipment, and relates to the technical field related to crystallinity, the crystallinity detection method comprises the following steps: determining related parameters of laser ultrasonic detection equipment, and the laser ultrasonic detection equipment is used for detecting the crystallinity of a to-be-detected polymer; laser is emitted to the current detection position of the to-be-detected polymer according to the related parameters, an original ultrasonic signal corresponding to the current detection position is determined, and the original ultrasonic signal carries intrinsic information of the to-be-detected polymer; and based on the original ultrasonic signal and each ultrasonic detection parameter, determining fused effective data, and based on the fused effective data, determining the crystallinity of the polymer. According to the invention, on-line accurate detection of the crystallinity of the polymer is realized.

The invention relates to the technical field of rice quality detection, in particular to a head rice rate online detection method and system based on machine vision, and the method comprises the steps: obtaining an initial binary image of a rice image; intelligently screening a rice grain adhesion region in the initial binarized image by using a BP neural network to obtain a to-be-segmented binarized image; segmenting each rice grain adhesion region in the to-be-segmented binary image by using a multi-distance transformation watershed segmentation method to obtain a first segmentation result image; segmenting a rice grain adhesion area in the first segmentation result image by using an angle limitation concave point matching segmentation method to obtain a second segmentation result image as a final segmentation result image; and obtaining the length of each rice grain in the rice image on the basis of the obtained segmentation result image by using a minimum bounding rectangle method so as to calculate the head rice rate of the rice image. According to the method, the segmentation accuracy is improved, the segmentation method is high in applicability, and subsequent measurement of characteristic parameters of single-grain rice is facilitated.

The invention provides a monitoring system for preventing wall scraping of a stirring cylinder, which is arranged on the outer side of the stirring cylinder in a non-contact manner and comprises a magnetic field generation module for generating a magnetic field; the magnetic field detection module is used for sensing a dynamic magnetic field generated when the stirring rod cuts the magnetic field and generating an analog electric signal; the signal acquisition and processing module is used for acquiring the analog electric signal, processing the analog electric signal and generating a digital electric signal; and the operation detection module is used for acquiring the position of the stirring rod according to the digital electric signal so as to realize the wall scraping prevention detection of the stirring cylinder. On the basis of a magnetic induction mode, an existing stirring cylinder does not need to be changed at all, the structure is not damaged, on-site procedures are not affected, and non-contact online detection of the position of the stirring rod is achieved.

The invention relates to the technical field of sand core dip-coating, in particular to a sand core dip-coating detection method and system. The dip-coating detection method comprises the following steps: dip-coating a sand core, and moving the dip-coated sand core to a detection station; acquiring a sand core image, acquiring a marking initial position matched with the sand core according to the sand core image, and moving the detection head to the marking initial position; the detection head moves from one side of the sand core to the other side of the sand core along a straight line, so that the reference plate and the scribing plate perform scribing on the sand core coating; and obtaining a sand core image after scribing, obtaining the number of scribed lines on the coating according to the sand core image, judging whether the number of the scribed lines is equal to a set number or not, and further detecting whether the wet thickness of the coating meets the requirement or not. Wet state thickness detection is carried out after the sand core is dip-coated and before the sand core is dried, so that the timeliness is improved, and the problem of casting scrapping caused by the delay of detection after drying is avoided.

The invention discloses a simple detection device and method for a breather valve, and the device comprises a hollow blind plate, a first detection gas circuit, and a second detection gas circuit, the hollow blind plate is disposed between the breather valve and a communication pipeline, the hollow blind plate is communicated with the inner cavity of the breather valve, the first detection gas circuit is communicated with the hollow blind plate, and is used for introducing gas into the breather valve, and the second detection gas circuit is communicated with the hollow blind plate. Simulating an expiration state of a breather valve; the second detection gas circuit is communicated with the hollow blind plate so as to form negative pressure for the breather valve and simulate the inspiration state of the breather valve; the first detection gas path and the second detection gas path are both communicated with the hollow blind plate through the monitoring gas path and are both communicated with the gas source. The whole device is simple in structural design, convenient to operate and high in popularization value, whether the breather valve is in a normal state or not is determined through regular self-testing, meanwhile, online self-testing can be achieved, and daily safe operation of the oil tank is not affected.

The invention discloses a four-eccentric type blind plate rapid switching device which comprises a lower valve body assembly, an upper valve body assembly, a sliding plate assembly, a four-eccentric synchronous clamping mechanism, a center positioning sliding guide mechanism, a driving mechanism and a safety lock mechanism. The lower valve body assembly and the upper valve body assembly are basically the same in structure, a flange is arranged on one side and is in butt joint with an installed pipeline flange, the other side is a sealing face, and the face, with the sealing face, of the lower valve body assembly and the face, with the sealing face, of the upper valve body assembly are oppositely installed. The sliding plate assembly is located between the lower valve body assembly and the upper valve body assembly, a through hole is formed in the center of one section, and the other section is used for cutting off media. The four-eccentric synchronous clamping mechanism is used for clamping the lower valve body assembly and the upper valve body assembly; the center positioning sliding guide mechanism is located on the periphery of the sliding plate assembly and can guarantee that the working position of the sliding plate assembly is coaxially centered and limited. And the safety lock mechanism prevents misoperation. The invention has the advantages of simple operation, good sealing performance, rapid switching, small size and light weight.

The invention relates to the field of gear detection, in particular to a herringbone tooth centering detection method, which comprises the following steps of: selecting four measuring balls with consistent parameters, and measuring a herringbone tooth with an even number of teeth: respectively putting the two measuring balls into a first tooth groove of a left-handed tooth surface and a first tooth groove of a right-handed tooth surface, the other two measuring balls are respectively placed in the (m / 2) th tooth groove of the left-handed tooth surface and the right-handed tooth surface; connecting the central points of the two measuring balls on the same spiral tooth surface, and measuring an included angle between the connecting lines; the method comprises the following steps of: measuring a herringbone tooth with an odd number of teeth: respectively putting two measuring balls into first tooth grooves of a left-handed tooth surface and a right-handed tooth surface, respectively putting the other two measuring balls into (n + 1) / 2 tooth grooves of the left-handed tooth surface and the right-handed tooth surface, respectively connecting the central points of the two measuring balls positioned on the same-handed tooth surface, and measuring an included angle between the connecting lines; and if the measured included angle value is greater than the preset value, the herringbone teeth are not centered. By implementing the scheme, the detection cost of herringbone tooth centering detection is reduced, and the detection range is expanded.

The invention discloses an on-line detection device and method for surface defects of an automatic fiber placement laying layer, and belongs to the field of aeronautical manufacturing visual inspection, the automatic fiber placement laying layer surface defect detection device comprises a multi-line structure light source, an industrial camera and an illumination light field light source; the multi-line structure light source and the industrial camera point to the surface of the laying layer, and the multi-line structure light source is used for projecting a multi-line structure light field; the illumination light field light source is arranged above the surface of the paving layer and is used for projecting an illumination light field; the industrial camera is matched with the illumination light field light source and the multi-line structure light source to collect two-dimensional images and three-dimensional point cloud information of the surface of the laying layer. Compared with an existing method of independently using a laser contourgraph or a two-dimensional camera, the method has the advantages of simple structure, multiple types of information capable of being collected, low cost, multiple defect recognition types, high defect recognition accuracy, high applicability and the like.

A micro inductor online visual detection fixing device. It relates to the field of inductor production equipment. Including the shell, a plurality of shell is placed in sequence on the conveying belt, the top of the conveying belt is equipped with a visual detection mechanism, the middle part of the shell is equipped with a containing cavity, the containing cavity penetrates the shell along the vertical direction; The upper part of the containing cavity is equipped with an upper baffle, the lower part of the containing cavity is equipped with a lower baffle, the lower baffle and the upper baffle are both mesh plates, a gas pump is arranged between the lower baffle and the upper baffle, the gas inlet pipe of the gas pump is located in the containing cavity, and the gas outlet pipe of the gas pump is located outside the containing cavity; The upper baffle is used for placing inductor. The application can improve the inductor detection efficiency and accuracy.

The invention provides a metal additive manufacturing online detection method and system, and the method comprises the steps: S1, inputting part drawing information, setting process parameters required by a machine, and carrying out additive manufacturing; s2, collecting a laser ultrasonic signal in the additive manufacturing process, and converting the laser ultrasonic signal into an electric signal; and S3, the electric signals are classified, and the actual situation of additive manufacturing is judged according to the classification result. The machine learning method can be used for fully and reasonably processing the electric signals converted from the laser ultrasonic signals in the forming process, and online detection of additive manufacturing is achieved; the additive manufacturing efficiency and the forming quality can be further improved, the metal additive manufacturing cost can be effectively reduced, and a technical foundation is laid for wide application of metal additive manufacturing.

The invention discloses an all-quartz multi-component Raman signal online detection module based on multi-laser additive and subtractive manufacturing. The all-quartz multi-component Raman signal online detection module comprises a node-free negative curvature hollow-core optical fiber with side micropores, a multimode optical fiber, a single-mode optical fiber plated with a ceramic film, a semicircular micro-channel, a quartz slurry packaging layer and a quartz fixing base, a micro-scale micropore is processed on the side surface of a node-free negative-curvature hollow fiber by utilizing picosecond laser, a multimode fiber, the node-free negative-curvature hollow fiber with the side micropore and a single-mode fiber are welded into a whole, the single-mode fiber is ground into a slice by utilizing an optical fiber grinding technology, and a ceramic membrane is deposited on the end surface of the slice single-mode fiber. Picosecond laser is used for scanning the quartz fixing base layer by layer so as to process a semicircular micro-channel for placing the sensor, and CO2 laser is used for scanning, depositing and curing the quartz slurry packaging layer layer by layer so as to package the sensor. According to the invention, the to-be-detected substance is injected into the all-quartz sensor, so that on-line detection of multi-component Raman signals can be realized in high electromagnetic interference environments such as electric power and the like.

A full-automatic photovoltaic glass thickness online measuring device is provided with a support device, a driving mechanism, a sliding measuring device and a control and display system, and the sliding measuring device is connected with the driving mechanism, installed on the support device on a glass production line and connected with the control system. The thickness of each part of the glass plate can be detected on line, and the functions of synchronous display, recording and alarming on the display screens in the cold end control chamber and the hot end control chamber can be achieved.

The present invention discloses an automatic assembly line for guide rails of construction machinery, including a conveying system, wherein the conveying system is horizontally provided with a loading section conveyor, a guide rail rack assembly section conveyor, a guide rail rack end face detection section conveyor, a guide rail standard section splicing section conveyor and a standard section output section conveyor in sequence from one end to the other end, rack assembly stations are provided on both sides of the guide rail rack assembly section conveyor, a side line for rejecting unqualified products is provided on one side of the rack end face detection section conveyor, standard section splicing stations are provided on both sides of the guide rail standard section splicing section conveyor, a finished product side shifting mechanism is provided on one side of the standard section output section conveyor, and a stacking truss manipulator is provided on the upper end of the finished product side shifting mechanism. The advantages of the present invention compared with the prior art are: it realizes loading, positioning, pre-tightening, debugging, online detection, automatic unloading, meets the consistency of quality, and reduces the intensity of manual labor.

The invention relates to the technical field of track shoe detection devices, and discloses a track shoe flatness automatic detection device and method.The detection device comprises a roller way conveying mechanism, a positioning mechanism, a supporting mechanism, a detection mechanism, a lifting mechanism and a PLC control system.The top end of the supporting mechanism is fixedly connected with the positioning mechanism used for positioning a workpiece to be detected; a roller way conveying mechanism is arranged on the side edge of the positioning mechanism, the lifting mechanism used for adjusting the height of the detection mechanism is arranged above the positioning mechanism, and the detection mechanism used for detecting a workpiece to be detected is connected to the lower portion of the lifting mechanism. The PLC control system controls the roller way conveying mechanism, the positioning mechanism, the supporting mechanism, the detection mechanism and the lifting mechanism to work through electric signals, the device is simple in structure, online detection of the planeness of the plate surface of a track shoe workpiece with holes can be achieved, the step of carrying the workpiece during manual detection is omitted, the labor intensity of workers is reduced, the detection efficiency is high, and the detection precision is high. The accuracy is high.

The utility model provides a slurry testing system and relates to the technical field of detection devices. The device is suitable for being connected to a slurry tank and comprises a pump body, a detection module, a cleaning barrel and a waste barrel, the input end of the pump body is suitable for switching communication between the slurry tank and the cleaning barrel, the output end of the pump body is connected to the detection module, and the detection module is configured to be capable of detecting resistance of slurry; and the output end of the detection module is suitable for switching communication between the slurry tank and the waste barrel, so that the pump body and the detection module respectively form a detection loop and a cleaning loop with the slurry tank or the clean water barrel / waste barrel. Through the scheme of the embodiment, the functionality of the test system can be improved, and the electrical performance of the battery cell material slurry can be detected on line.

The utility model relates to the technical field of cleanliness detection, in particular to a device for detecting cleanliness on line based on an ultraviolet fluorescence method. The device for online detection of the cleanliness based on the ultraviolet fluorescence method comprises a measurement module; the measurement module comprises a light path module and a calibration module; the calibration module comprises a stepping motor, a standard sample bracket and a position detection sensor; the stepping motor is connected with the standard sample bracket and drives the standard sample bracket to rotate, and the standard sample bracket comprises a plurality of cleanliness sample bracket units and channels arranged among the cleanliness sample bracket units; and the position detection sensor is arranged on the standard sample bracket. The light path module carries out detection by adopting an ultraviolet fluorescence method, has high sensitivity to common pollutants such as oil stains and organic impurities on the metal plate strip, can accurately detect trace pollutants, and improves the precision of cleanliness detection.

A leak detection device for an aluminum foil sealed can comprises an upper turntable and a lower turntable. Seats are evenly arranged on the outer circumference of the upper turntable. A guide rail is arranged below the lower turntable. The guide rail is circular and has a high position section on the left side. A lifting shaft is passed through the circumference of the upper turntable and the lower turntable. A shoulder is provided at the lower end of the lifting shaft. A compression spring is sleeved on the lifting shaft and is located between the lower turntable and the shoulder. A roller is installed at the bottom of the lifting shaft. A lifting plate is fixed at the upper end of the lifting shaft. A pressure block is fixed at the end of the lifting plate. An air hole is processed in the middle of the pressure block. An elastic block is fixed at the lower part of the pressure block. A vacuum tube is fixed in the middle of the lifting plate. The upper part of the vacuum tube is connected with a vacuum shut-off valve. A composite vacuum gauge is installed on the vacuum tube. A connecting pipe connects the air hole with the vacuum tube. An electromagnetic valve is arranged on the connecting pipe. The leak detection device provided by the invention is ingeniously designed. It detects the change of vacuum degree in the vacuum tube by negative pressure. It has high detection efficiency and high detection accuracy. It realizes online detection and is very suitable for actual production of enterprises.

This invention provides an online detection method and system for the curing characteristics of epoxy molding compounds, belonging to the field of materials testing and analysis technology. The method includes: during the molding process, acquiring electrical response data of the epoxy molding compound within the mold cavity at at least two different excitation frequencies, and simultaneously acquiring equivalent temperature data of the mold cavity; calculating the complex impedance data corresponding to each excitation frequency based on the electrical response data, constructing a dielectric characteristic quantity to characterize the change in dielectric response of the epoxy molding compound, and performing temperature compensation processing on the dielectric characteristic quantity in conjunction with the equivalent temperature data of the mold cavity; based on the temperature-compensated dielectric characteristic quantity, obtaining online inversion information on the degree of curing change of the epoxy molding compound; based on the degree of curing change information, determining the gel determination time during the curing process of the epoxy molding compound, and outputting online detection results characterizing the curing state of the epoxy molding compound. This invention achieves real-time and stable detection of the curing process and gelation stage of epoxy molding compounds.

The invention discloses an ultrasonic detection system and method for a bushing lead. The system comprises a transmitting probe and a receiving probe, and the transmitting probe and the receiving probe are arranged on the outer side wall of a bushing; the fault detection main circuit is electrically connected with the transmitting probe and the receiving probe respectively; the upper computer is electrically connected with the fault detection main circuit and is used for controlling the fault detection main circuit to drive the transmitting probe to transmit an ultrasonic signal into the sleeve; the receiving probe receives and transmits an ultrasonic echo signal obtained after the ultrasonic signal is reflected in the sleeve; and the fault detection main circuit is used for processing the received ultrasonic echo signal into a time signal and then displaying the time signal through the upper computer. According to the invention, the detection time can be shortened, the online detection of the high-voltage bushing lead can be realized, the insulation fault can be accurately and timely found, and the reliable operation of the high-voltage bushing lead can be ensured.

The invention relates to the technical field of skid-mounted devices and automatic interlocking, in particular to a heavy oil high-temperature purification sewage multi-medium stage treatment device and a detection method, the heavy oil high-temperature purification sewage multi-medium stage treatment device comprises a silicon content detection instrument, a hardness detection instrument, a mineralization degree detection instrument, an oxygen content detection instrument, a chloride ion detection instrument, an oil content detection instrument and the like; according to the detection method, after a to-be-analyzed sample solution is subjected to primary cooling, the cooled sample solution is directly subjected to oil content and suspended matter detection in two paths, after the other path is subjected to three-stage filtration and secondary cooling, the other path is subjected to mineralization degree, oxygen and chloride ion detection in three paths, and the other path is subjected to silicon content and hardness detection after filtration. According to the stage treatment device, a five-section sample liquid pretreatment technology of two-stage water cooling and three-stage filter element filtering is adopted, sample liquid is shunted according to the detection requirements of different detection instruments, the problem that all components in the sample liquid interfere with one another is solved, the instrument detection accuracy is improved, and online detection of heavy oil high-temperature purification sewage is achieved.

The present invention relates to a flip test device, comprising a frame, a roller line is provided on one side of the frame along its length direction, a detection device is provided on the other side, a flip table is provided in the middle of the frame, which can be matched on the roller line and can be rotated to the top of the detection device, the roller line includes three groups of rollers arranged at intervals along the width direction of the frame, the flip table includes a loading plate, a positioning horizontal bar fixed on the loading plate, two flip support rods slidably connected to the bottom of the loading plate, and a driving mechanism connected to the flip support rods, any flip support rod can be placed in the gap between two adjacent groups of rollers when flipped to a horizontal position, and a moving mechanism connected to the loading plate is provided on the flip support rod. The present invention can realize online detection of water heaters, and mechanical operation is used to complete the flipping of water heaters and the inflation of air nozzles, which effectively reduces labor intensity and improves work efficiency, and has the advantages of simple operation, convenient use, and high degree of automation.

The present invention relates to an adsorption device capable of online monitoring. The adsorption device comprises an online mid-infrared spectrum detection system, a branch with a test sample pool is arranged on a material pipeline that needs to be monitored online, and an online mid-infrared spectrometer is used to detect the material in the sample pool. The adsorption device capable of online monitoring of the present invention can perform real-time online detection of the material concentration in the adsorption device.

The invention provides a bolt looseness detection method, system and device based on passive flow-induced random guided waves, and the method comprises the steps: enabling a plurality of sensors to be pasted on two flat plates which are connected through bolts, and collecting random guided wave signals which are transmitted in the plates and are caused by environmental noise; processing the acquired random guided wave signal by using a cross-correlation and band-pass filtering method; constructing an imaging equation by using the obtained cross-correlation function under different filtering frequencies; a to-be-imaged area containing all the bolts is divided into discrete grids, each node of the grids is assumed to be a scattering point of guided wave cross-plate propagation, pixel values needed by imaging are calculated through the extracted bolt tightness features, and imaging analysis of the tightness of the multi-bolt structure is achieved. The guided wave propagation model in the multi-bolt structure is provided, the propagation path and energy information of passive random guided waves are extracted, the multi-bolt tightness imaging method based on delay superposition is obtained, and online detection of the tightness of the multi-bolt structure is achieved.

The invention relates to the technical field of composite material production, in particular to a demolding cloth cover line accumulation detection method, device and equipment and a medium, and the method comprises the steps: obtaining a demolding cloth cover image, and converting the demolding cloth cover image into a grayscale image; enhancing the low-frequency part of the grayscale image by using the filtering vector to obtain an enhanced image; performing dynamic threshold segmentation on the enhanced image, and segmenting an area of which the gray value accords with a set threshold; performing morphological processing on the region, and segmenting a connected domain to obtain a region set; and judging whether a region of which the area size accords with an area threshold value exists in the region set, and if so, judging that a line accumulation region exists. According to the method, surface flaws caused by the defects in carbon plate production can be effectively avoided, the scheme can adapt to demolding cloth of different types and thicknesses through the dynamic threshold segmentation and morphological processing method, the applicability of the scheme is improved, online detection is achieved, and problems in the production process can be rapidly found and processed.

The invention discloses an organic liquid hydrogen storage online hydrogen content detection device and method. Comprising a detection box, a sealing cup is arranged in the detection box, a sample injection pipe is arranged on the detection box, a quantitative roller is arranged on the sample injection pipe, a plurality of quantitative grooves are formed in the quantitative roller, a temperature control assembly is arranged in the detection box, a weighing assembly is arranged below the sealing cup, a measuring pipe is arranged on the lower portion of the sealing cup, and a temperature control assembly is arranged on the measuring pipe. A refractometer is arranged in the detection box, and a transmission module is further arranged in the detection box. The method disclosed by the invention has the advantages that two groups of data are utilized to establish each stable standard curve at 25-30 DEG C, so that standard data can be checked at each temperature. And then the detection device is used for detecting the sample, the available hydrogen amount is obtained by comparing the standard curve at the corresponding temperature according to the detection temperature, the process of mutual correction at different temperatures is omitted, and errors generated in the process are erased, so that the detection data is more accurate.

The invention discloses an automatic purification device for high-temperature dust in a hearth and a working method of the automatic purification device, and belongs to the technical field of plate glass manufacturing. The device comprises a forming furnace, an annealing furnace, an automatic detection system and a purification and dust collection system, the furnace is positioned below the forming furnace; a plurality of first dust suction pipes are mounted in hearths of the forming furnace and the annealing furnace; the first dust suction pipe is connected with the purification and dust collection system through a connecting piece; the purification and dust collection system is connected and used for collecting hot air in the forming furnace and the annealing furnace and conveying the hot air subjected to filtering and dust removal into hearths of the forming furnace and the annealing furnace again through an air supply pipe; the automatic detection system is connected with the forming furnace or the annealing furnace and used for detecting the dust concentration in a hearth of the forming furnace or the annealing furnace and feeding the dust concentration back to the purification and dust collection system through the PLC control system. According to the invention, the concentration of tiny dust in the hearth can be detected on line, and the tiny dust in the hearth can be purified, so that the thermal adhesion defect of the glass surface is reduced.

The invention discloses a continuous flow ion chromatography combined system, which relates to the technical field of industrial water treatment, and comprises a total phosphorus content analysis continuous flow module and an inorganic phosphorus content analysis ion chromatography module, the total phosphorus content analysis continuous flow module is used for detecting the total phosphorus content and comprises a peristaltic pump, a mixed reaction coil, an ultraviolet digester, a first heating reaction tank, a second heating reaction tank and a flow detection tank, and the inorganic phosphorus content analysis ion chromatography module is used for detecting the inorganic phosphorus content and comprises a sample valve, a guard column, an ion chromatographic column, a suppressor and a detector. According to the continuous flow ion chromatography combined system, the total phosphorus content analysis continuous flow module and the inorganic phosphorus content analysis ion chromatography module work independently and do not interfere with each other, the total phosphate content, the organic phosphorus content and the inorganic phosphorus content in the phosphorus-containing scale inhibitor can be detected at the same time at a time, phosphorus-containing water treatment agent samples in the two modules cannot be subjected to cross contamination, and the detection accuracy is high. The interference of human factors on the detection result is reduced, and the accuracy is high.

The application discloses a screw rod part assembly section lead error detection structure and a detection method, the detection structure comprises an assembly plate, a screw rod, a wire rail, an extension structure mounting plate, a connecting plate, a plurality of elastic extension test structures, a pressure sensor and an eddy current sensor, the wire rail, the screw rod and the extension structure mounting plate are arranged in parallel on the assembly plate, the connecting plate is fixedly connected with a screw nut seat and is slidingly arranged on the wire rail, each elastic extension test structure comprises an extension block and a metal test piece, the extension block is slidingly arranged on the extension structure mounting plate, the metal test piece is arranged on the extension block, the pressure sensor is mounted on the connecting plate, and the eddy current sensor is mounted on the connecting plate and is arranged opposite to the metal test piece. The application can realize screw pitch error detection and lead error calculation of a machine tool in a part assembly stage, improve subsequent assembly process of the screw rod in the part assembly stage, improve assembly precision and assembly efficiency of the screw rod, and avoid the problem that it is difficult to adjust error out-of-tolerance found after whole machine assembly.

The invention discloses an online sludge detection system in a sludge treatment process, which comprises a sludge treatment tank, a sampling pipe, a sampling gate valve, a sampling pump, an online detector, a reflux gate valve, a reflux pipe, a data analysis module and a main control module, the input end of the sampling pipe is communicated with the sludge treatment tank, and the output end of the sampling pipe is communicated with the sludge treatment tank through the reflux pipe; a sampling gate valve is arranged on the sampling pipe, a backflow gate valve is arranged on the backflow pipe, a sampling pump and an online detector are sequentially arranged between the sampling gate valve and the backflow gate valve, the signal input end of the data analysis module is connected with the online detector, and the signal output end of the data analysis module is connected with the main control module. The signal control end of the master control module is connected with the sampling gate valve, the sampling pump and the backflow gate valve. The sludge in the sludge treatment tank can be detected on line, the detection precision is high, automatic treatment can be carried out according to the detection result, manual operation is not needed, the labor intensity of workers is reduced, the treatment efficiency is improved, and time and labor are saved.