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This invention discloses a primer and probe set, a kit, and their applications for detecting Staphylococcus aureus L based on real-time fluorescence MIRA technology. The primer and probe set consists of single-stranded DNA sequences 1-3. Based on the aforementioned primer and probe set, this invention establishes and optimizes a real-time fluorescence MIRA detection method for Staphylococcus aureus L. Furthermore, the optimized real-time fluorescence MIRA method is innovatively combined with a simplified nucleic acid extraction method and a portable fluorescence detection device, significantly reducing extraction and time costs while enabling rapid on-site detection of the virus, making it particularly suitable for grassroots units and remote areas. In addition, the real-time fluorescence MIRA detection method for Staphylococcus aureus L established in this invention has advantages such as high specificity, high sensitivity, and simple operation. Moreover, the detection process does not require opening the lid, effectively avoiding aerosol contamination, providing an effective technical means for the differential diagnosis and rapid detection of Staphylococcus aureus L.

The invention discloses a glass bottle defect detection method, which belongs to the technical field of defect detection, and comprises the following steps: labeling defect areas for all images and adding corresponding defect labels to obtain a first preprocessed image with the defect areas and the defect labels; respectively adopting corresponding pre-training models for a first pre-processed image in the bottle body image library, a first pre-processed image in the bottle opening image library and a first pre-processed image in the bottle bottom image library, taking the first pre-processed images as input, and outputting a predicted defect area and a predicted defect label, incremental learning is carried out on the corresponding pre-training models, and detection models corresponding to the bottle body, the bottle opening and the bottle bottom are obtained respectively; and respectively inputting the newly obtained images into the corresponding detection models to obtain corresponding defect labels, defect areas and confidence coefficients. The glass bottle defect detection method solves the problem that at present, different parts need to be detected at different times, and rapid detection of the glass bottle is difficult to achieve.

The invention discloses a pleiotropic InDel molecular marker related to soybean yield, quality and agronomic traits and application, and relates to the technical field of molecular detection. Whole genome association analysis finds that a specific number of TC repetitive sequences exist in a specific region of a No.19 chromosome of soybean and are remarkably related to the characters of soybean yield, quality, plant height, leaf type and flowering time, and an InDel molecular marker is developed based on the TC repetitive sequences. By utilizing the InDel molecular marker, the genotype of a target site can be quickly and accurately detected, and soybean materials with different genetic backgrounds can be distinguished, so that soybean varieties with excellent agronomic traits such as yield, quality related traits, plant height and flowering time can be effectively screened in an auxiliary manner. According to the method, the breeding selection accuracy and efficiency are remarkably improved, and a powerful tool is provided for accelerating the soybean genetic improvement process.

The invention discloses a power battery pack health state monitoring system, and relates to the field of battery pack health state monitoring, and the system comprises a vehicle information input module which is used for receiving vehicle unique identification information inputted by a user; the standard data acquisition module is used for acquiring historical operation and charging and discharging data corresponding to the unique identification information of the vehicle from a cloud data source; the data fusion and feature construction module is used for constructing a battery state evaluation feature set; the battery health assessment module is used for constructing a battery pack health state assessment model and outputting a battery health state assessment result; the safety risk grading module is used for carrying out grading evaluation on the potential safety risk of the vehicle battery; and the report generation and display module is used for generating a structured detection report. The method has the advantages that the full life cycle of the power battery pack from real-time health state accurate evaluation to future safety risk grading early warning is realized, and intelligent monitoring can be explained.

This invention provides a CRISPR / Cas12a fluorescence detection method for FocTR4 based on magnetic bead-ssDNA-HRP probes, belonging to the field of nucleic acid detection technology. This invention involves isothermal amplification of the FocTR4 target sequence using RPA primers; then, a magnetic bead-ssDNA-HRP probe is prepared; and the Cas12a / crRNA complex, RPA amplification product, and probe are co-incubated. The activated Cas12a cleaves the probe, releasing HRP. After magnetic separation, a colorimetric solution containing OPD is added, and the presence and concentration of FocTR4 are determined by detecting the fluorescence signal. This invention combines the high efficiency of CRISPR / Cas12a cleavage with the high sensitivity and strong specificity of RPA technology, achieving highly sensitive and specific detection of FocTR4, with a linear detection range of 10. 2 ~10 7 With a detection limit as low as 70 CFU / mL, it can quickly and accurately detect Foc TR4 in soil samples, enabling rapid on-site detection and providing reliable technical support for the early diagnosis and control of banana wilt disease.

The application relates to a human blood volume in-vitro calculation method based on a magnetic tracer, and relates to the fields of biomedical engineering and quantum sensing technology.The method comprises the following steps: obtaining blood samples of a subject before and after the subject is introduced with a known mass magnetic tracer as baseline blood samples and to-be-detected blood samples; performing homogenization pretreatment on the blood samples to prevent red blood cell sedimentation; collecting baseline magnetic signals and mixed magnetic signals by using high-sensitivity magnetic sensors, and obtaining net magnetic signals through differential operation; substituting the net magnetic signals into a homologous matrix standard curve to inversely calculate the tracer concentration; and calculating the blood volume according to the dilution law.The application adopts the magnetic tracer to replace the radioactive isotope, and combines the quantum magnetic sensing technology, so that the application has the advantages of no radioactivity, high safety, portability of equipment, low cost, repeatable measurement and the like, and is suitable for bed-side rapid detection of the blood volume.

Embodiments of the present application provide a network traffic detection method, device, storage medium and program product, the method comprising: performing semantic coding processing on network traffic data to obtain a first feature vector, the network traffic data comprising payload data; performing redundant feature screening and feature dimension reduction processing on the first feature vector to obtain a feature subset of the first feature vector; obtaining a local correlation feature matrix and a multi-scale feature matrix of the feature subset, wherein the local correlation feature matrix is used to represent the correlation between local features of the feature subset, and the multi-scale feature matrix is used to represent the correlation between local features of the feature subset at different scales; performing fusion processing on the local correlation feature matrix and the multi-scale feature matrix to obtain a fused feature matrix, and determining the category of the network traffic data according to the fused feature matrix.

The invention provides an automatic transfer system for tobacco primary processing and unpacking, the automatic transfer system for tobacco primary processing and unpacking comprises a process planning module, an equipment execution module and an operation monitoring module, the process planning module is used for obtaining a box skin transfer process of a tobacco primary processing and unpacking link and generating a corresponding unpacking operation instruction; the equipment execution module is used for responding to the unpacking operation instruction and carrying out unpacking transfer work according to the unpacking operation instruction; and the operation monitoring module is used for monitoring the instruction issuing state of the process planning module and the operation running state of the equipment execution module, and visually displaying the instruction issuing state and the operation running state. Through cooperative linkage of the three modules, full-process automation of box skin and lining paper collection and the like in the tobacco primary processing unpacking link is achieved, manual operation is effectively replaced, the situation that in the prior art, an AGV is only used as a pure transfer tool is changed, and the overall automation degree and operation efficiency are greatly improved.

The application provides a VR detection lens, which comprises, in sequence from an object side to an imaging surface along an optical axis, an aperture, a first lens group with positive refractive power, a second lens group with negative refractive power, and a third lens group with positive refractive power; the lens satisfies the following conditions: 0.8<=|f20 / f|<=1.5, 33<=|f30 / f|<=40, and 4.0<=|f40 / f|<=5.0, wherein f is the focal length of the detection lens, f20 is the focal length of the first lens group, f30 is the focal length of the second lens group, and f40 is the focal length of the third lens group. The application has higher resolution and a larger field of view, can well simulate human eye observation, and realizes batch rapid detection of VR products.

The present application relates to a kind of modular molten salt loading and storage system, including vertical support structure rack, normal temperature electrical equipment group and high temperature molten salt equipment group are physically separated by isolation fence and integrated in it;High temperature molten salt equipment group includes molten salt storage tank and molten salt pipeline connected with molten salt storage tank;Molten salt pipeline includes molten salt loading pipe, molten salt loading pipe has upward inclination relative to horizontal plane, to realize the self-weight backflow of molten salt;The middle section of molten salt loading pipe is connected with molten salt isolation valve, and molten salt isolation valve and normal temperature electrical equipment group are cooperated to realize the on-off control of molten salt loading pipe.The present application effectively avoids the thermal influence of high temperature environment on normal temperature electrical equipment by isolation fence, and the integrated design of overall modularization integrates the core equipment of molten salt loading and storage into one, discards the traditional dispersed equipment arrangement and installation mode, greatly simplifies the field construction process, reduces installation period, also makes the debugging, maintenance and overhaul of system more convenient.

The invention relates to the technical field of manufacturing and processing of marine turbochargers, in particular to a method and a device for processing a ring thrust bearing of a marine supercharger, which are characterized in that after a set of preparation process including rough turning, heat treatment, semi-finish turning and inner hole accurate grinding is adopted, a special taper mandrel for grinding is used for clamping the bearing, and the bearing is clamped by a conical mandrel for grinding; the taper mandrel for grinding has the precise taper of 1: 5000, high surface quality and rigid design matched with the length of a bearing, accurate grinding of all outer circles and end faces is completed through one-time clamping of double tips of a numerical control grinding machine, and online detection is achieved in cooperation with a special auxiliary detection tool. The problem that the form and position precision is difficult to guarantee due to clamping deformation and repeated positioning errors in traditional machining is effectively solved, and therefore high-precision (such as roundness, coaxiality and parallelism are in the micron level), low-deformation, efficient and stable machining is achieved at the same time in the manufacturing process of the large thin-wall annular thrust bearing.

This invention provides a pretreatment method for detecting metribuzin in soil and broad beans using liquid chromatography-mass spectrometry (LC-MS / MS). The method includes: weighing 10.0 g of soil into a 50.0 ml centrifuge tube, adding 10.0 ml of acetonitrile, vortexing for 3.0 min, adding 3.0 g of NaCl, vortexing for 1.0 min, centrifuging at 5000 rpm for 5.0 min, taking 1.5 ml of the supernatant and adding it to a 2.5 ml centrifuge tube containing 25.0 mg PSA, 25.0 mg C18, and 100 mg anhydrous MgSO4, vortexing for 1.0 min, centrifuging at 8000 rpm for 3.0 min, aspirating the supernatant with a 5.0 ml syringe, filtering through a membrane, and transferring to a 2.5 ml brown sample bottle. This invention is applicable to the detection of metribuzin residues in broad beans, a specialty crop grown in high-altitude regions.

The utility model discloses an automobile torsion bar strength simple detection device comprising a pedestal, two parallel guide rails are arranged on the pedestal, one end of each guide rail is provided with a slide block, the other end of each guide rail is provided with a fixed block, a rotating shaft parallel to the guide rails in the fixed block is communicated with two sides of the fixed block, and one end of the front end of the rotating shaft located at the inner side of the fixed block is provided with a rotating disc. A mounting groove is formed in the axis position of the other side of the rotary disc, a mounting block is arranged in the mounting groove, and a fixing groove is formed in the mounting block. The beneficial effects of the utility model are that the utility model provides a simple and convenient automobile torsion bar strength detection device, through adopting a simple, convenient and rapid detection technology, the time of torsion bar strength detection is greatly shortened, compared with a traditional manual loading experiment, the novel device can realize timely and rapid detection, the detection period is reduced, and the detection efficiency is improved. The production efficiency is improved, and the rapid production line detection requirement is met.

The application discloses a Chinese pear psylla MIRA-CRISPR / Cas12a detection kit and method, and belongs to the technical field of rapid detection of pest resistance. In view of the target resistance mutation (GluCl gene V267I site) of Chinese pear psylla to abamectin, the application first combines the CRISPR / Cas12a system with the MIRA isothermal amplification technology, and establishes a visual detection system with high specificity and high sensitivity. The kit comprises MIRA amplification primers, specific crRNA, Cas12a protease and a fluorescent reporter probe. During detection, only a single head of pear psylla sample is needed, after rapid DNA extraction, MIRA amplification and CRISPR cutting reaction are carried out under the condition of constant temperature of 37 DEG C, the total time consumption is not more than 1 hour, and the result is directly visually judged by a portable blue light lamp (green fluorescence is displayed for a positive sample). The application is simple in operation, does not need large instruments, and the result is intuitive, so that real-time monitoring of the abamectin resistance of Chinese pear psylla in the field can be realized, and technical support is provided for scientific rotation of drugs and precise prevention and control.

The application relates to the technical field of new energy vehicles and vehicle detection equipment, and discloses a portable device for heavy truck axle housing liquid level measurement, which is suitable for electric drive axle and traditional drive axle. The device comprises a shell support structure, an electronic control assembly, a posture adjusting execution mechanism, a quick locking connection mechanism and a liquid level measurement assembly; the shell support structure is used for supporting the device and stretching and retracting the measurement assembly; the electronic control assembly is used for power supply, control and result display; the posture adjusting execution mechanism is used for adjusting the posture of the measurement assembly to keep it vertical; the quick locking connection mechanism is used for quickly fixing the device and the oil filling hole of the axle housing; and the liquid level measurement assembly realizes liquid level detection by cooperating a magnetic float and a Hall sensor. The application takes into account the application requirements of the electric drive axle and the traditional drive axle, and can especially meet the requirements of the electric drive axle on liquid level detection precision and reliability.

The present application belongs to the field of metal ion concentration detection, and particularly relates to a method for detecting the concentration of vanadium ions in the negative electrolyte of a vanadium battery by two-step potentiometric titration. In view of the problems of inaccurate measurement results, large errors and complicated operation of the negative electrolyte of the vanadium battery, the present application detects the concentration of vanadium ions in the negative electrolyte of the vanadium battery by two-step potentiometric titration. In the first step, the negative electrolyte is added to a solution containing excess pentavalent vanadium and sulfuric acid, and the pentavalent vanadium ions oxidize the divalent and trivalent vanadium ions in the solution into tetravalent vanadium ions, and at the same time, part of the pentavalent vanadium ions are reduced into tetravalent vanadium ions. Subsequently, the concentration of tetravalent vanadium ions in the solution is titrated with potassium permanganate to solve the problem of exposure of divalent vanadium ions to oxidation. In the second step, the concentration of vanadium ions in the negative electrolyte is directly titrated with potassium permanganate. The results prove that the present application has small detection result deviation, high precision and accuracy, and the instrument is light and portable, and is suitable for real-time monitoring of energy storage power stations.

According to the rapid testing method for the discoloration of the copper ion wall coating, the defects that in an existing discoloration test, the discoloration test period of the copper ion wall coating is long, and the discoloration is slow can be overcome, the discoloration of copper ions can be more obvious by arranging different test matrix partitions on a gypsum board and combining new special test putty, and the discoloration of the copper ions can be more uniform. Meanwhile, the oven heating drying is added, the reaction speed can be increased, and the test period is shortened. In addition, the equal transverse division parts are added in the optimization scheme, so that the color change condition of the copper ion wall coating on different base materials can be tested synchronously.

The application belongs to the technical field of transformer fault identification and maintenance, and particularly relates to an integrated online monitoring system based on early diagnosis of power station transformer faults; a UAV stabilizes flight to the position of power equipment through a UAV flight stabilization module to perform video shooting, and the video is transmitted to a deep learning power equipment fault identification platform in real time; the deep learning power equipment fault identification platform analyzes and processes the transmitted video, and in combination with the data of the power equipment sensor, judges the fault cause of the power equipment, and transmits the judgment result data to a fault maintenance unit; the fault maintenance unit checks and maintains in combination with the transmitted judgment result data; a terminal data display screen displays the running data of the power equipment in real time; a power equipment independent database retains and updates the running data of the power equipment; not only is the UAV introduced to form unique flight for the power equipment, but also a new identification technology is introduced for the fault of the power equipment as an auxiliary means.

This utility model discloses a titanium rod flatness detection platform, relating to the field of titanium rod detection technology. The utility model includes a workbench, with a titanium rod body mounted on top of the workbench. A detection mechanism is mounted on the surface of the titanium rod body, comprising an airbag disposed on the surface of the titanium rod body, an annular fixing ring fixedly connected to the surface of the airbag, and a detection tube connected to the front side of the airbag. By combining an airbag with a pressure sensor, this utility model enables real-time and continuous detection of the flatness of the titanium rod surface, avoiding the inefficiency of traditional point-by-point measurement methods, significantly improving detection efficiency and automation. Through the cooperation of a motor, threaded rod, and threaded sleeve in the moving mechanism, the detection mechanism moves smoothly and at a uniform speed along the titanium rod axis, ensuring the continuity and consistency of data acquisition and improving the accuracy and reliability of the detection results.

The embodiment of the application provides a subway track gauge vehicle for rapid measurement in a complex environment, which comprises a track trolley, a support, a left first width indicating rod, a right first width indicating rod and a top width indicating rod, the track trolley comprises a trolley body and a trolley wheel, and the track trolley can walk along a track of a to-be-detected section; the support is detachably installed above the trolley body; the left first width indicating rod is detachably fixedly connected with the support, and the left first width indicating rod is arranged on the left side of the advancing direction of the track trolley in the direction of the height of the track trolley; the right first width indicating rod is detachably fixedly connected with the support, and the right first width indicating rod is arranged on the right side of the advancing direction of the track trolley in the direction of the height of the track trolley; and the top width indicating rod is arranged in the width direction of the track trolley, and the top width indicating rod is detachably fixedly connected with the support. The subway track gauge vehicle for rapid measurement in a complex environment provided by the embodiment can quickly and conveniently detect whether there is an intrusion problem of a subway track along-line equipment.

The invention discloses a primer and a kit for rapidly detecting yersinia rouxii through RPA-CRISPR / Cas12a and application of the primer and the kit, and relates to the technical field of disease prevention and control in aquaculture. The invention aims to solve the problems that the existing detection method is time-consuming and labor-consuming, is easy to cause pollution and needs to be matched with professional detection equipment. According to the present invention, the RPA amplification primer is composed of a forward primer yrp1-RPA-F2 and a reverse primer yrp1-RPA-R2, the crRNA is yrp1-crRNA-R1, and the kit for rapid detection of yersinia rouxii contains the RPA amplification primer and the crRNA. The method for rapidly detecting yersinia rouxii comprises a fluorescence method and a test paper method. The method disclosed by the invention has the advantages of good inclusiveness, strong specificity, high sensitivity and the like, detection is carried out based on the RPA primer and the crRNA, and the obtained RPA product is detected by using a lateral flow chromatography test strip and fluorescence, so that the purpose of portable visual rapid detection on site or in a breeding base is achieved, and the method is suitable for large-scale popularization and application. The method has very high clinical application value in the aspects of early discovery of diseases, epidemiological investigation and comprehensive prevention and control.

The invention provides an MOF-on-MOF composite material, an aptamer probe as well as a preparation method and application of the aptamer probe. The MOF-on-MOF composite material comprises an HKUST-1 material, the surface of the HKUST-1 material is coated with a Cu-BDC nanosheet; the synthesized HKUST-1 (at) Cu-BDC / Apt aptamer probe can specifically recognize AFB1, the aptamer probe can directly capture the AFB1 and adsorb the AFB1 to active sites on the surface of a material to reduce the nano-enzyme activity of the AFB1, so that quantitative colorimetric detection of the AFB1 is realized, and the aptamer probe has low detection limit, wide detection range, good selectivity and anti-interference performance on the AFB1 and can be used for detecting the AFB1. The AFB1 in a food sample can be rapidly, sensitively and selectively detected. In addition, the composite material has an adsorption effect and high catalytic activity on fungaltoxin, and AFB1 can be efficiently removed through the adsorption effect and the catalytic action.

The application provides a glass lifter testing device, which comprises a testing table, a host positioning detection assembly, a lifting arm positioning detection assembly and a self-locking force testing assembly.The testing table comprises a support frame and a table plate.The host positioning detection assembly comprises a host positioning seat and a first pressing mechanism.The host positioning seat is fixed with a positioning disc at the top and is fixed with a first distance sensor at the bottom.The first pressing mechanism is arranged on the side of the host positioning seat and comprises a pressing head.The lifting arm positioning detection assembly comprises a first positioning seat and a second positioning seat.The self-locking force testing assembly comprises a horizontal moving mechanism.The moving block of the horizontal moving mechanism is connected with a pushing block.The pushing block is fixed with a torque sensor.The torque sensor is fixed with a pushing plate.The pushing plate corresponds to a bracket on the lifting arm.The testing device can quickly detect the glass lifter in different position areas of the bracket, ensure that each component is assembled in place and the reliability of the self-locking force of the bracket.

This invention provides a gene related to loquat flowering. SVP1 This invention relates to the field of molecular biology, specifically to a tightly linked SNP marker and its applications. The nucleotide sequence of this SNP marker is shown in SEQ ID NO.1. A genotype of C at the locus corresponds to a spring-flowering phenotype in loquat, while a genotype of G corresponds to an autumn-flowering phenotype. The invention also provides specific primers (SEQ ID NO.2 and SEQ ID NO.3) for detecting this SNP marker, a kit containing these primers, and a screening method for detecting loquat flowering time using this marker. By extracting loquat DNA and performing PCR amplification and sequencing analysis, the flowering period of loquat can be quickly and accurately determined. The SNP marker of this invention is highly linked to loquat flowering time, providing an effective tool for marker-assisted selection breeding of loquat at different flowering periods. This significantly improves breeding efficiency, shortens the breeding cycle, and is of great significance for extending the loquat fruit supply period and optimizing the industrial structure.

This invention provides a method for determining the metallic iron content in steel slag, comprising the following steps: 1) selecting a representative steel slag sample from the steel slag to be tested, and ball milling the representative steel slag sample to form a sieve material that can pass through a 0.08 mm mesh sieve or a first magnetically separated material that can be attracted by a magnet; 2) further separating the sieve material by magnetic attraction to form a second magnetically separated material and tailings; 3) measuring the density ρ of the tailings. 尾渣 The first magnetic separator and the second magnetic separator are mixed to form a total magnetic separator, and the density ρ of the total magnetic separator is measured. 磁选物 ;4) According to ρ 尾渣 ρ 磁选物 The percentage of metallic iron in a representative steel slag sample is obtained by measuring the mass of a representative steel slag sample and the mass of the total magnetically separated material. This determination method is simple, convenient, and highly accurate, providing a precise basis for evaluating the recycling value and economic added value of steel slag.

The invention relates to a rapid detection method for cadmium residual quantity in aquatic products based on magnetic qualitative separation and polarized light distinguishing and quantifying. The method comprises the following steps: coupling a biotinylated cadmium monoclonal antibody through streptavidin magnetic microspheres, and specifically enriching trace cadmium in the aquatic product digestive juice to form a magnetic compound; a muller matrix microscope is used for collecting a polarization microscopic image of a compound, and a deep learning model (such as RESNET34) is combined to carry out binary classification and particle counting on the image, so that rapid and high-sensitivity quantitative detection of cadmium can be realized. The method is easy and convenient to operate, the target object magnetic separation time is within 2 min, the particle distinguishing accuracy rate is higher than 84%, the quantitative correlation Rreaches 0.9 or above, and the method is suitable for rapid monitoring of trace cadmium (several micrograms / L) in aquatic products.

The application discloses a comprehensive distribution box for smart grid, and relates to the technical field of distribution boxes.The comprehensive distribution box for smart grid comprises a main body, an adjusting assembly is clamped in the inner cavity of the main body, and the adjusting assembly is adjusted synchronously along with the wiring channel demand; a splicing assembly is assembled at the end of the adjusting assembly, and the splicing assembly is used for lengthening or width adjusting of the wiring channel.The comprehensive distribution box for smart grid can accurately adjust the width of the wiring channel according to actual demand through the adjusting mechanism, can ensure that the space can be fully utilized under various environments, and can avoid unnecessary waste; the size of the wiring channel can be accurately controlled by adjusting the end of the line, space waste can be avoided, and the wiring layout can be optimized; meanwhile, the end of the wiring channel is adjusted, the channel width can be quickly expanded or reduced according to the change of the load, and the comprehensive distribution box for smart grid is suitable for different scenes.

The application discloses an active intrusion prevention method, relates to the technical field of system network security, and aims to solve the problems of low detection precision and detection lag of existing network abnormal intrusion, and comprises the following steps: obtaining preprocessed network data; performing multi-dimensional traffic data analysis on the network data to obtain the network data labeled with network state credibility measurement results and various sub-dimension measurement labels; calculating the labeled network data through a machine learning classification algorithm to obtain characteristic behavior classification of the network data; and performing suspicious node detection through fine-grained real-time measurement according to the classification results and updating a security strategy. The application further discloses an active intrusion prevention device. The application can quickly analyze network intrusion through multi-dimensional analysis of network data and machine learning.

The utility model relates to water quality monitoring technical field, concretely is a kind of external water quality on-line monitoring device applied to anaerobic fermentation.The device includes water quality extraction device, water quality detection box and BOD sensor, one end of back liquid pipe and liquid suction pipe respectively into biogas slurry tank, the other end of liquid suction pipe is connected with the liquid inlet of peristaltic pump, the liquid outlet of peristaltic pump is connected with the liquid inlet of water quality detection box, the liquid outlet of water quality detection box is connected with the liquid inlet of BOD sensor, the liquid outlet of BOD sensor is connected with the other end of back liquid pipe;The one end pipe orifice side of liquid suction pipe into biogas slurry tank is fixed with weight, the one end of fine wire into biogas slurry tank is connected with weight, the other end of fine wire is wound on the roller of water quality extraction device.The utility model can control the liquid of different depths to be measured to be extracted, can also detect multiple parameters simultaneously, and can also be continuously monitored for a long time.