74results about How to "Stable detection" patented technology

The invention relates to the technical field of visual inspection, in particular to a stamping part defect detection method based on vision, which comprises the following steps: S1, shooting setting; s2, synchronizing video streams; s3, acquiring a part bounding box and a hole position bounding box; s4, associating part bounding boxes belonging to the same stamping part among the frame part images, and associating hole position bounding boxes belonging to the same screw hole position; s5, correspondingly associating the bounding boxes of the target parts belonging to the same stamping part in the part image; s6, when a hole position boundary frame matched with the view angle template image of the corresponding view angle exists in any target detection image under any view angle, determining that a screw hole position exists; and when the matched hole position boundary frame is not found in the target detection image under the corresponding visual angle in the visual angle template images of all the visual angles, the screw hole position is missing. The stamping part defect detection device can be used for defect detection of stamping parts in the conveying process, the consistency of detection results is improved, and the detection efficiency is improved.

This utility model discloses a battery testing cabinet, which includes a cabinet frame and a series of components. The cabinet frame is divided into two parts: a battery receiving chamber and a battery testing chamber. The battery receiving chamber is equipped with multiple horizontal partitions and ventilation grids for storing batteries that have completed testing and improving heat dissipation. The battery testing chamber is equipped with a placement plate, an adjustment slot, a clamping plate, and an electrical connection assembly. The battery charge is detected by controlling the up-and-down movement of the electrical connection assembly through a lifting cylinder. The electrical connection assembly adopts a return spring design to provide buffer protection and avoid damage to the battery or equipment from rigid contact. This application can improve testing efficiency, enhance versatility and safety, and is suitable for battery testing needs in various scenarios.

The utility model discloses a rotation precision detection tool for a bearing, which belongs to the technical field of mechanical bearing detection, and comprises an operation table, a fixed column, a rotating shaft, a rotating disc, a lifting plate, a lifting disc, a bearing, a rotation detection assembly and an auxiliary detection assembly, the auxiliary detection assembly is arranged on the upper portion of the operation table, an air cylinder is fixedly installed on the upper portion of the lifting plate, an L-shaped installation plate is arranged on the upper portion of the lifting plate in a sliding mode, a rack is fixedly installed outside the L-shaped installation plate, the rack is meshed with the gear, and the movable end of the air cylinder is fixedly connected with the outer surface of the L-shaped installation plate. According to the bearing detection device, the bearing can be mechanically detected, meanwhile, detection is conducted in a mechanical mode, the number of turns of rotation each time can be the same, detection is more accurate, and therefore the problem that the force of rotation each time cannot be kept consistent due to the fact that manual work cannot be achieved is solved.

The present application relates to compressor online detection technical field, provide a kind of compressor online detection equipment and compressor online detection method.The compressor online detection equipment includes: stabilized power supply, with the compressor to be measured is connected;Suction stabilized component is connected in the suction pipeline of the compressor to be measured, for adjusting the suction pressure of the compressor to be measured;Exhaust stabilized component is connected in the exhaust pipeline of the compressor to be measured, for adjusting the exhaust pressure of the compressor to be measured, so that the compressor to be measured has exhaust pressure constant load operating phase;And acquisition device, with the compressor to be measured is connected, for acquiring the operating parameter of the compressor to be measured in the load operating phase.The present application can realize the flexible, stable, accurate detection of the operating parameter of the compressor to be measured, meet the test demand of the compressor to be measured.

The invention discloses a double-top-electrode 4H-SiC position detector and a preparation method and application thereof. The double-top-electrode 4H-SiC position detector comprises a 4H-SiC substrate, a first electrode, a second electrode and a third electrode, the first and second top electrodes are arranged on the silicon surface of the substrate and are separated from each other; the bottom electrode is arranged on the carbon surface of the substrate. According to the detector, high-precision linear detection of the incident light position is realized in a single 4H-SiC material system by using a discrete double-top-electrode structure, and the problem that a traditional single-electrode structure cannot perform position sensing is solved; meanwhile, the problem of a heterogeneous material interface is fundamentally avoided through the full 4H-SiC-based monolithic structure, so that the long-term stability and reliability in extreme environments such as high temperature and intense radiation are remarkably improved by virtue of the excellent wide-band gap characteristic of the 4H-SiC material and the intrinsic stability of the structure while the high position detection precision is maintained; the problem that an existing position detector with a complex structure is insufficient in environment tolerance is solved.

The present application relates to the technical field of image processing, and more particularly to a pancreatic cancer and breast cancer early image diagnosis method based on multi-modal contrast learning, step 1: obtaining multiple time-phase multi-modal images of the pancreas and breast of a subject in a unified spatial reference system to form a basic data set; step 2: based on the basic data set, alternately encoding the lesion candidate area mask and the peripheral ring domain mask to obtain an encoded feature vector; step 3: aligning the organ identification as the key according to the time-phase block index, and filling in the encoded feature vector of the missing time-phase block according to the set rule; jointly determining the intra-organ results of the two organs according to the set priority, and outputting the overall result. The present application can improve the sensitivity and specificity of early lesion detection, and enhance the diagnostic robustness and clinical application value while maintaining interpretability and traceability.

This invention provides a method and application for the efficient determination of functional components in Acer truncatum leaves, relating to the field of plant functional component detection technology. The method includes the following steps: (1) two ultrasonic-assisted extractions using 70% methanol, followed by merging the extracts; (2) detection using high-performance liquid chromatography-tandem mass spectrometry. This invention achieves simultaneous, accurate, rapid, and stable detection of multifunctional components in Acer truncatum leaves.

This utility model relates to the field of railway track inspection technology, specifically disclosing a railway track fastener inspection instrument, including a housing. A quick-locking mechanism is provided at the bottom of the housing, comprising two docking blocks. An electromagnetic impedance detector body is housed within the inner cavity of the housing. The tops of the two docking blocks are fixedly connected to the bottom of the electromagnetic impedance detector body. Slots adapted to the docking blocks are provided on both sides of the bottom of the inner cavity of the housing. This utility model enables convenient installation and secure fixing of the electromagnetic impedance detector body, effectively reducing the impact of vibration or collision during transportation and use, thereby improving the durability of the equipment and the reliability of the inspection data. It also provides good fixing for the connecting wires, further ensuring the stable operation of the inspection process.

The utility model relates to stable contact wire rod detection equipment, which comprises a conduction detector, an electric box fixed at the lower end of the conduction detector and a detection port fixed on the side surface of the electric box, can realize high-efficiency detection of wire rods through the well-designed detection port, and utilizes a magnetic suction structure to detect that a power supply cannot be conducted when a wire rod interface is not completely inserted. According to the novel wire rod detection equipment, the magnetic attraction structure is arranged, detection inaccuracy caused by poor contact is prevented, meanwhile, the magnetic attraction structure can rapidly exit from the structure of the detected wire rod after detection is completed, efficient detection is achieved, efficient, safe and stable detection of the wire rod can be achieved, and it is ensured that the produced wire rod meets the standard.

This invention belongs to the field of electrochemiluminescence materials technology, and discloses a gold-silver nanocluster, its preparation method, and its application in the electrochemiluminescence-electrochemical dual-mode detection of chloramphenicol. The preparation method involves adding a silver source solution to a gold source solution, then adding an alkaline thiol β-cyclodextrin solution to obtain a mixed solution. Sodium bicarbonate is added to adjust the pH to 8.2-8.4, followed by incubation to obtain a crude product of gold-silver nanoclusters. The crude product is then purified by centrifugation and dialyzed to obtain the gold-silver nanoclusters. Furthermore, this invention uses these gold-silver nanoclusters as an ECL luminescent material to construct a sensor and applies it to the quantitative detection of chloramphenicol. This sensor innovatively achieves synergistic detection of ECL and DPV dual signals, with mutually verifiable detection results, exhibiting high sensitivity, excellent selectivity, good stability, and excellent repeatability.

The invention relates to a battery charge state detection method and device, equipment and a program product. The method comprises the following steps: updating a forgetting factor of a measurement noise covariance matrix of a state space model according to a comparison result of an actual error of a prediction circuit parameter measurement value and a theoretical error of the prediction circuit parameter measurement value to obtain an updated measurement noise covariance matrix, and performing positive qualitative correction on the updated measurement noise covariance matrix to obtain an updated state space model, and converting the actual circuit parameter measurement value into the target charge state of the battery at the target moment through the updated state space model. By adopting the method, the detection precision and robustness of the state of charge of the battery in a complex scene can be improved.

The application discloses a mycoplasma hyopneumoniae protein quantification and vaccine quality evaluation method, and belongs to the technical field of protein detection and vaccine quality control. In order to develop and produce high-quality mycoplasma hyopneumoniae vaccine products, high-quality and high-yield mycoplasma hyopneumoniae bacterial liquid needs to be cultured and produced, quality monitoring needs to be performed on the cultured and produced mycoplasma hyopneumoniae bacterial liquid sample, and a mycoplasma hyopneumoniae BCA protein quantification detection method needs to be established to guide the culture and production of the mycoplasma hyopneumoniae bacterial liquid. Therefore, the application determines optimal ultrasonic parameters and antigen treatment modes through a series of optimizations, and the method is repeatedly verified. The results show that the optimized method has good stability, short time consumption, and small sample consumption, and can be used for rapid detection of the protein content of the mycoplasma hyopneumoniae bacterial liquid in a laboratory. The antigen content detected by the method can also be used as a functional index for evaluating the preparation of the vaccine.

The application belongs to the technical field of biological probes, and relates to a PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe and a preparation method thereof. The PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe comprises a core, a covalent organic framework and a PD-L1 antibody, the core comprises a superparamagnetic nanoparticle, the covalent organic framework is coated on the surface of the core, and the PD-L1 antibody is combined on the surface of the covalent organic framework. The PD-L1 guided specific targeted CTC detection combined with tumor boundary distinguishing biological probe prepared by the application can be transported into the body across the membrane, smoothly enter a PD-L1 positive malignant tumor lesion, and perform Raman imaging to microscopically distinguish the tumor boundary.

The application relates to the technical field of visual detection, and discloses a visual detection device for surface defects of injection-molded products, which comprises a fixing frame and a rectangular plastic shell and further comprises a turnover mechanism arranged on the fixing frame, wherein the turnover mechanism comprises a plurality of pushing assemblies, each of the pushing assemblies comprises a rectangular groove arranged in a U-shaped plate, and a limiting spring is fixedly installed on the top inner wall of each of the rectangular grooves. The friction force generated between the rubber semicircular block and the back surface of the rectangular plastic shell can continuously drive the rubber semicircular block to turn over, so that the original bottom surface of the rectangular plastic shell is turned over to the upper side, and the corresponding rubber semicircular block is separated from the rectangular plastic shell. In the process, the intelligent visual detector and the side visual detector can visually detect the original bottom surface and the back surface of the rectangular plastic shell, so that the comprehensive visual detection of the rectangular plastic shell is realized, the defects existing on the rectangular plastic shell can be avoided from being undetected, and the detection quality is improved.

This invention discloses a highly sensitive detection device and method for immersion-type ultrasonic signal detection in liquids. The invention provides a circular diaphragm with concentric corrugations and a center-thinned structure, and uses this diaphragm as a reflective surface of an optical interference cavity to construct a highly sensitive detection device for immersion-type ultrasonic signal detection in liquids. The diaphragm, used to sense ultrasonic signals, has identical concentric corrugations and a center-thinned structure on both sides, enabling the diaphragm to achieve higher mechanical sensitivity without significantly reducing its natural frequency. The concentric corrugations effectively release initial residual stress introduced during processing and packaging, reducing surface warping and baseline drift. Simultaneously, a replaceable acoustic membrane is constructed in front of the diaphragm, achieving high sound transmission and anti-contamination under long-term immersion in liquid conditions. This detection device can be directly placed in the liquid for detection, improving the sensitivity of ultrasonic signal detection while maintaining a wide frequency range, preventing contamination of the detection element, and ensuring the long-term stability of the detection device.

The utility model discloses a kind of fiber product and polycrystal membrane automation detection device, including horizontal moving mechanism, the bottom of horizontal moving mechanism is fixedly arranged with connecting plate, horizontal moving mechanism is used to drive connecting plate horizontal to and fro movement, the bottom middle position of connecting plate is fixedly arranged electric push rod, the bottom of electric push rod is fixedly arranged with transverse plate, the below of transverse plate is provided with detector, the bottom of transverse plate is fixedly arranged with mounting mechanism, and mounting mechanism is used to fix detector;Mounting mechanism includes mounting block, and mounting block is fixedly arranged at the bottom of transverse plate, mounting groove is opened in the bottom of mounting block, detector is clamped in mounting groove, the utility model solves the detection method of the existing fiber product and polycrystal membrane is manually held detection device and contact with it, then manually moves detection device to detect fiber product and polycrystal membrane, manually held detection device moves poor stability, and the problem that manual holding is more labor-consuming.

The utility model discloses a oil cylinder inner diameter detector, including frame body, the frame body is U type setting, the frame body both sides all are established and are passed through the groove, the sliding connection of through -going groove has the sliding block, the common display disc of being equipped with between two sliding blocks, display disc lower extreme is equipped with connecting rod, the connecting rod lower extreme is equipped with contact head, is equipped with the bellows between contact head and connecting rod, the both ends of frame body all are equipped with the fixed knot that is used for fixing it, frame body upper end is equipped with the moving mechanism that is used for moving display disc. The utility model discloses make the convex board outer wall extrusion fixed frame, make display disc and contact head all move down, make contact head and the detection place contact, thereby realize the stable detection to the oil cylinder inner diameter, avoid appearing the stability shortage, cause the influence to the detection result.

The utility model discloses a portable multi-depth water temperature rapid detection sensor belongs to environmental monitoring technical field, and its technical scheme main points include controller, the front side of controller is provided with telescopic component, the front side of telescopic component is provided with the detection component of adjustable type, telescopic component includes the support frame of fixed connection in the outside of controller, the inboard sliding connection of support frame has telescopic support, the top of support frame is provided with the limit sliding slot, can solve the portable multi-depth water temperature rapid detection sensor of existing portable multi-depth water temperature rapid detection sensor usually lacks adjustable length adjusting function, is inconvenient according to the detection distance flexible adjustment equipment length of stretching out, thereby needing operator to move position frequently or unable to send the detector accurately to the target water body, influence detection efficiency, and lack multi-depth adjustment detection structure, difficult fast, accurately control water temperature detector and stay detection in different depth, influence the problem of the flexibility of detection.

The application provides a sliding pin gap detection mechanism for a steam turbine inner bearing seat, which comprises a bearing seat and a high-pressure cylinder shell connected to one side of the bearing seat, wherein a vertical pin is arranged on the side surface of the bearing seat close to the high-pressure cylinder shell, a pin slot is arranged on the side of the high-pressure cylinder shell close to the bearing seat for the vertical pin to pass through, and a detection device is arranged in the slot body of the pin slot; the detection device comprises a mounting slot arranged at the end of the pin slot away from the bearing seat, and a pressure-resistant shell arranged in the slot body of the mounting slot; an infrared distance measuring sensor is arranged on the shell body of the pressure-resistant shell, and a stabilizing assembly is arranged on both sides of the infrared distance measuring sensor in the pressure-resistant shell. When the high-pressure cylinder shell expands, the infrared distance measuring sensor is clamped, the relative shaking of the infrared distance measuring sensor is reduced, and the infrared distance measuring sensor is stably detected.

This invention discloses a classroom scene object detection method based on multi-scale feature enhancement and semantic alignment, implemented according to the following steps: Step 1, obtain a classroom scene object detection dataset; Step 2, improve the YOLOv11 one-stage object detection network to obtain a student classroom scene object detection model; Step 3, train the student classroom scene object detection model using the classroom scene object detection dataset obtained in Step 1 to obtain a trained student classroom scene object detection model; Step 4, input the student classroom scene image to be detected into the trained student classroom scene object detection model for detection. This invention solves the problem in existing technologies where insufficient feature extraction and feature fusion mechanisms make it difficult to meet the accuracy requirements of actual classroom scene object detection.

The utility model discloses a water pump bearing friction torque detection instrument which comprises a support and a servo motor, a loading cylinder is arranged on the support, and the output end of the loading cylinder is connected with a fixing tool used for fixing an outer ring of a water pump bearing. A loading air cylinder is arranged on the support, a positioning tool used for fixing a water pump bearing mandrel is rotationally arranged on the support and located below the loading air cylinder, a torque sensor is connected to an output shaft of the servo motor, the torque sensor is in transmission connection with the positioning tool through a connecting module, and an output shaft of the loading air cylinder and an output shaft of the servo motor are coaxially arranged. The torque measuring device is simple in structure and closer to actual working conditions, and torque measurement of the water pump bearing assembly under different loads is achieved.

This invention proposes a method for detecting land parcel changes, comprising: S1, performing edge pixel detection to obtain edge pixels of cultivated land parcels; S2, filtering redundant edge pixels from the obtained cultivated land parcel edge pixels; and S3, detecting land parcel changes. This invention also proposes a corresponding land parcel change detection system. It solves the problem of how to quickly and accurately detect changes in cultivated land parcels, particularly by eliminating the heavy reliance on large-scale cultivated land parcel mapping at different times.

The invention discloses a multiple qPCR (quantitative polymerase chain reaction) detection composition, method and kit for detecting various DNA / RNA (deoxyribonucleic acid / ribonucleic acid) viruses, and aims to detect various human DNA / RNA viruses possibly existing in biological products, compare and analyze through database analysis, find virus genome conserved sequences, design primers and probes with higher specificity and detect most subtypes of the viruses. A plurality of pairs of probe primers are designed for a virus conserved region, the primer probes with good specificity and high sensitivity are finally screened, the virus content of 2 * 10 < 7 > copies / [mu] L to 20 copies / [mu] L can be accurately quantified, and the sensitivity of most viruses can reach 2-10 copies / [mu] L. By repeatedly screening and optimizing a reaction system, including the concentrations of the primers and the probes, the detection method can be used for stably detecting various DNA / RNA viruses under the condition of fewer nucleic acid samples, is simple to operate and has higher sensitivity.

The invention discloses a low-crosstalk long-distance sensing integrated device and a very-low-frequency sensing method, and relates to the technical field of fusion of optical fiber sensing and optical fiber communication. The device comprises a laser, a coupler, a communication modulation device, a sensing modulation device, an optical fiber transmission and relay link, a communication receiving device, a sensing receiving device and a signal processing device. The communication modulation device adopts digital subcarrier multiplexing and reserves a guard interval in a frequency spectrum center, and residual carrier filtering is combined to reduce the inductance crosstalk; the sensing modulation device realizes high-extinction-ratio pulses through a cascade light modulator, and the signal-to-noise ratio is improved. The optical fiber link adopts a bidirectional amplification relay module to synchronously amplify forward and backward signals so as to realize ultra-long distance transmission. The signal processing device carries out high-density sampling and space-time dimension fusion on the sensing beat frequency signals, and very low frequency vibration information is effectively extracted. According to the invention, common-light-source, low-crosstalk, long-distance, very-low-frequency and high-sensitivity integrated transmission and detection of communication and sensing signals are realized.

The utility model relates to the field of pressure sensing, and discloses a flexible pressure sensor for breath detection. The sensor comprises a first protective layer, a first electrode layer, a conical pressure-sensitive array, a flexible substrate, a second electrode layer and a second protective layer. The conical pressure-sensitive array consists of conical microstructures and is positioned between the first electrode layer and the flexible substrate; the second electrode layer is located on the lower side of the flexible substrate; the first and second protection layers are respectively arranged on the upper and lower sides of the first and second electrode layers. When the sensor is subjected to laryngeal respiratory pressure, the conical pressure-sensitive array deforms, the contact area between the conical pressure-sensitive array and the electrodes is rapidly increased, the resistance is rapidly reduced, the pressure is converted into a resistance signal, and stable detection of respiratory signals is achieved by measuring the resistance value of the sensor through the piezoresistive effect. The system has the characteristics of high response speed, high sensitivity and strong stability, and provides a wide application prospect for wearable equipment and health detection.

This utility model discloses a fixed base for a tapping torque testing machine, relating to the technical field of tapping testing equipment. It includes a testing machine body with an L-shaped base. A longitudinal adjustment component is mounted on the vertical section of the L-shaped base, and a transverse adjustment component is mounted on the longitudinal adjustment component. A support seat is connected to the transverse adjustment component, and a fixed seat and a connecting block are fixed on the support seat. A first adjusting screw is screwed onto the connecting block, and a clamping plate is rotatably connected to the end of the first adjusting screw near the fixed seat via a bearing. In this utility model, the clamping plate can be moved by the first adjusting screw, allowing for the clamping of test pieces of different sizes in conjunction with the fixed seat, eliminating the need to replace special fixtures. The longitudinal adjustment component can drive the test piece to move axially along the L-shaped base, and the transverse adjustment component can drive the test piece to move laterally, facilitating longitudinal and transverse position calibration, making operation convenient and reducing equipment costs.

The invention relates to the technical field of motor temperature detection, and discloses a permanent magnet synchronous motor temperature detection method based on double-model fusion, which comprises the following steps: step 1, acquiring an operation signal of a permanent magnet synchronous motor; step 2, establishing a resistance observer model according to the operation signal, and calculating a resistance model temperature T; 3, establishing a motor heat balance temperature model according to the operation signal, and estimating a winding temperature T; and 4, fusing the double models, and slowly converging the temperature T of the thermal model to the temperature T of the resistance model by using a small gain kf. According to the invention, by setting two detection models and fusing the two models, the problems of high cost and low detection precision during motor temperature detection in the prior art are solved.

The invention relates to the technical field of hydrogen measurement, and discloses an experiment method and device for optimizing an optical fiber hydrogen measurement sensor, and the method comprises the following steps: connecting an optical fiber hydrogen sensor and an MOS hydrogen sensor in a closed gas sensitive test cavity, and setting control programs of a gas inlet valve and a gas outlet valve; controlling the valve to introduce hydrogen into the gas-sensitive test cavity to form a preset dynamic concentration curve; the intracavity hydrogen concentration CFOS (t) measured by the optical fiber hydrogen sensor and the intracavity hydrogen concentration CMOS (t) measured by the MOS hydrogen sensor are obtained; based on the combination of extended Kalman filtering and a recursive least square method, the collected signals are processed, and the dynamic response and sensitivity factors of the optical fiber hydrogen sensor are adaptively corrected; according to the experimental method and device for optimizing the optical fiber hydrogen measuring sensor, it can be ensured that the sensor can still keep correct measurement in the constantly changing environment.

An endoscope auxiliary device for pipeline detection, comprising a mounting frame and a plurality of support structures connected to the mounting frame, each of the support structures comprising two cross arranged support rods, the mounting frame being length adjustable, and each end of the mounting frame being provided with a fastening structure for fixing the endoscope; the fastening structure comprising a plurality of fasteners forming a ring structure, the fasteners being provided with first adjusting members for adjusting the position of the fasteners; compared with the prior art, the endoscope is fixed by the fastening structure, so that the endoscope is more stable when moving in the pipeline and detecting, and the shaking of the endoscope is avoided to affect the detection structure, and at the same time, the fastening structure comprises a plurality of fasteners, the endoscope is fixed around by the fasteners, and the position of the corresponding fasteners is adjusted by the first adjusting members, so that the fixation of endoscopes of different sizes and shapes is satisfied.

The utility model relates to air filter performance detection technical field, concretely is a kind of air filter performance detection device, including detection chamber, smoke generation platform is arranged in the detection chamber, the one-way intercommunication pipe of breathability is arranged at the top of detection chamber, one side of the detection chamber is provided with side plate, air inlet is arranged on the side plate, the blowing assembly in the detection chamber is installed in air inlet side, the bottom end outside of side plate is provided with supporting plate, clamping assembly for abutting tightly air filter to be measured is arranged on the both sides of air inlet, the utility model can be positioned installation by each component cooperation to different specifications air filter, realizes the stable detection to filter filter performance, improves the adaptability and detection efficiency of device to different specifications filter.