253results about How to "Realize detection" patented technology

The utility model provides a PCB circuit board fixing and detecting tool, which comprises a fixing mechanism for fixing a PCB circuit board body and a detecting device arranged above the PCB circuit board body, the fixing mechanism comprises two rotating rods which are parallel to each other and transversely arranged, an elastic assembly arranged on the side face of the side, close to the other rotating rod, of one rotating rod, and two conveying belts which are arranged on the rotating rods in parallel and connected with the elastic assembly, and the conveying direction of the conveying belts is parallel to the length direction of the rotating rods. The driving assembly is arranged on the rotating rods and controls the conveying directions of the adjacent conveying faces of the two conveying belts to be the same, the two vertical rods are arranged in the vertical direction, and the top ends of the vertical rods are rotationally connected with the middles of the side faces of the sides, away from each other, of the two rotating rods correspondingly; the rotating assembly is arranged at the top end of the vertical rod and controls the two rotating rods to rotate around the middle position; according to the utility model, the PCB circuit board can be conveniently and comprehensively detected, and the detection efficiency of the PCB circuit board is improved.

The invention relates to a method and a device for detecting short-circuit resistance in a battery on line, and the method comprises the steps: applying two constant-current pulses with different amplitudes to the battery when the battery is in a working state; acquiring at least two groups of dynamic response data; calculating the equivalent ohmic internal resistance of the battery according to the dynamic response data; respectively obtaining voltage difference models corresponding to the two constant current pulses according to the current working state of the battery; and calculating the internal short-circuit resistance of the battery in the current working state based on a voltage difference model and the equivalent ohmic internal resistance. The method has the advantages that the two constant-current pulses with different amplitudes are applied to the battery, then the dynamic response data of the battery are collected to obtain the voltage difference model corresponding to the constant-current pulses, the internal short-circuit resistance of the battery in the current working state is calculated through the voltage difference model and the equivalent ohmic internal resistance, internal short-circuit resistance detection is achieved, and the accuracy is high.

This invention provides a method, device, electronic device, and storage medium for detecting illegal dog walking incidents. The method fully utilizes the characteristics of the leash, designs a leash detection model to detect inclined target leashes, and designs a human-dog-leash relationship judgment model to detect the interaction between the human and the leash and / or the interaction between the leash and the dog. Thus, the detection results of illegal dog walking incidents determined based on the interaction between the human and the leash and / or the interaction between the leash and the dog are more accurate. In addition, the entire process is completed automatically and has good intelligence.

The application discloses a kind of storage module detection circuit, method, device and medium, it is related to storage module detection technical field.The circuit includes: data communication module;Data analysis and verification module are electrically connected with data communication module;Interface control module is electrically connected with data communication module and data analysis and verification module respectively;Data communication module is used to receive the data packet sent by host, and the data packet meeting protocol is sent to data analysis and verification module;Data analysis and verification module are used to analyze data packet, obtain analysis result;Interface control module is used to carry out read operation or write operation to storage module according to analysis result, receive the response result of storage module;Data analysis and verification module are used to check response result, obtain verification result, and send verification result to data communication module;Data communication module is also used to send verification result to host.The circuit can realize detection and result feedback to storage module by simple command.

The application discloses an electrochemical sensor and a preparation method and application thereof. The electrochemical sensor comprises a three-electrode system composed of a working electrode, a reference electrode and a counter electrode, wherein the working electrode is composed of a base electrode, a molybdenum disulfide nanoparticle modification layer and a polyethylene dioxythiophene layer; the molybdenum disulfide nanoparticles are loaded on the surface of the base electrode through a drop coating method, and the polyethylene dioxythiophene is in-situ loaded on the surface of the molybdenum disulfide nanoparticle modification layer through an electro-polymerization reaction. The electrochemical sensor can be used for detecting lead ions in water bodies, has the advantages of simple preparation, stable performance, suitability for an acidic medium and the like, and is suitable for practical application and popularization.

The utility model discloses a visual PIN needle detection equipment, including test board, the fixture seat of setting on test board and the CCD subassembly of setting on the fixture seat top, the CCD subassembly includes the coaxial light source, telecentric lens and CCD camera who sets gradually in vertical direction away from fixture seat, and CCD camera, telecentric lens and coaxial light source are on the same axis, and the light shield of setting the back and two side masks of test board is provided with on test board, and the connecting interface is provided with on test board, and the fixture seat includes the base and the positioning fixture of detachable setting on the base, and the positioning fixture is used for positioning installation detected component, and the support plate for supporting base is provided with on test board, and the sensor is provided with on the both sides of positioning fixture of support plate. The utility model discloses reasonable in structure design, and through the visual configuration of CCD camera + telecentric lens + coaxial light source, can realize to PIN needle and carry out detection, and thoroughly solved the problem that PIN needle is easy to wear in other detection mode among existing.

The application relates to the technical field of basket catheter, in particular to a basket catheter system and a basket catheter calibration method. The basket catheter system comprises a basket catheter, an operating handle, a tube body and a basket electrode assembly, the basket electrode assembly comprises a spline, a proximal end fixing seat and a distal end fixing seat, and the basket catheter system further comprises a proximal end position sensor and a distal end position sensor arranged on the proximal end fixing seat and the distal end fixing seat respectively; the basket catheter system further comprises a processing device, the proximal end position sensor and the distal end position sensor are connected with the basket catheter, and the processing device is used for obtaining a contact force of the basket electrode assembly and target tissue according to a proximal-distal end spacing change amount, a corresponding relationship between a known axial force value of the basket electrode assembly and the proximal-distal end spacing change amount and a contact angle of the basket electrode assembly and the target tissue. The application mainly solves the technical problem of how to detect the contact force of the basket catheter and the target tissue.

This invention discloses a UAV inspection method and system for bridge bearings. The method includes: planning a strip-shaped flight path and constructing a coarse 3D point cloud model of the bridge; then planning a scanning flight path around the bridge's outer envelope to collect fine point clouds of bridge components; firstly, using a small amount of labeled data combined with pseudo-label generation and knowledge distillation to complete lightweight training of the PointNet model; then, strengthening structural association features through a contextual attention mechanism and generating virtual points using an occlusion region feature completion method to complete the occluded region and obtain a complete bearing point set; finally, extracting bearing geometric parameters by weighted noise point removal, iteratively fitting bounding boxes, and smoothing; planning a flight path based on the bearing's location to collect the bearing's surface image; then performing image cleaning and enhancement processing, and finally identifying surface defects using image recognition methods to generate an inspection report. Comprehensive technical support is provided.

The invention relates to the technical field of bridge construction equipment, in particular to a detection device for detecting bridge construction pavement flatness, which comprises a fixed plate, a lifting box, a detection mechanism and a lifting mechanism, a plurality of mounting grooves are formed in the lifting box; the detection mechanism comprises a signal conversion structure and a lifting trigger mechanism, the signal conversion structure comprises a touch screen and a touch pen, a pen point of the touch pen abuts against the touch screen, the lifting trigger mechanism comprises a cover plate, a lifting rod, a motion conversion structure and a reset structure, and the lifting rod perpendicularly penetrates through the cover plate and is movably connected with the cover plate. The motion conversion structure is used for converting vertical motion of the lifting rod into rotation of the touch pen around the lifting rod, and the reset structure is used for providing downward thrust for the lifting rod; the lifting mechanism is used for adjusting the height of the lifting box; according to the invention, the lifting box, the detection mechanism and the lifting mechanism are arranged, so that error loss of signal transmission in an indirect detection mode is avoided, and the accuracy of signal detection is greatly improved.

This invention discloses a comprehensive performance testing system for an electronic expansion valve. One end of an electric proportional valve is connected to the outlet of a gas storage tank via a booster pump, and the other end is sequentially connected to valve 1, a first pressure sensor, valve 3, valve 6, a second pressure sensor, a stepping solenoid valve, valve 8, and a first flow meter. One end of valve 2 is connected between valve 1 and the first pressure sensor, and the other end is left unconnected. One end of valve 5 is connected to the connection point of valve 3 and the first pressure sensor, and the other end is connected to one end of valve 4. The other end of valve 4 is connected to the connection point of valve 6 and the second pressure sensor. One end of valve 7 is connected between the first pressure sensor and the stepping solenoid valve, and the other end is left unconnected. One end of valve 9 is connected between the stepping solenoid valve and valve 8, and the other end is connected to the second flow meter. The inlet and outlet of the electronic expansion valve under test are connected between valve 3 and valve 6, and between valve 5 and valve 4, respectively.

The utility model discloses a laser rangefinder for lifting a table board, which comprises a shell and a laser ranging module arranged in the shell, the shell is provided with a probe hole for laser to penetrate through, the shell is also provided with a notch part, the inner side of the notch part comprises a first reference surface and a second reference surface which extend in different directions, and the first reference surface and the second reference surface are arranged on the shell. The extension direction of the first reference surface is perpendicular to the extension direction of the probe hole. According to the lifting table, the ground clearance of the lifting table board can be accurately measured through the laser range finder, whether the lifting table board is inclined or not can be conveniently judged, and the laser range finder can be rapidly positioned on the lifting table board so that measurement can be conveniently conducted. In addition, the utility model further discloses an electric lifting table provided with the laser range finder.

The utility model discloses a fruit and vegetable pesticide residue detector, which relates to the technical field of pesticide residue detection and comprises a detector main body, a display screen is mounted at the top of the detector main body, a bearing column is fixedly connected to the inner wall of the detector main body, a rotating component is arranged in the bearing column, and a bearing component is arranged above the bearing column. A glass test tube is arranged on the outer side of the bearing column, and a spectrophotometer is fixedly mounted on the outer surface of the bearing column. The bearing and limiting effects of the glass test tube can be achieved through the bearing assembly, intermittent rotation of the bearing assembly and the glass test tube can be achieved through the rotating assembly, and detection of a sample in the glass test tube can be achieved through the spectrophotometer and the detector; the rotating assembly, the bearing assembly, the glass test tube, the spectrophotometer and the detector are matched for use, so that samples in the glass test tube can be continuously and rapidly detected, and the detection efficiency of the samples is improved.

This invention discloses a battery cover welding quality inspection device and method, including a tracked conveyor. Positioning devices are respectively installed on both sides of the tracked conveyor, and a first linear drive device is installed on the top of the tracked conveyor. A suction cup is connected to the bottom output shaft of the first linear drive device. A displacement platform is installed below the track of the tracked conveyor, and both positioning devices are fixed to the top of the displacement platform. Compared with the prior art, this invention, by setting up a displacement platform, allows the battery to move synchronously to the right along with the track during the inspection process. After inspection, the battery is completely removed from the inspection station, and the battery to be inspected on the left can directly enter the inspection without waiting for the inspection station to be emptied, effectively reducing process waiting time and improving the inspection efficiency of battery cover welding quality.

The rocker assembly comprises a mounting seat, a rocker and a first capacitance detection assembly, the rocker is movably arranged on the mounting seat, and the first capacitance detection assembly comprises a dielectric plate, a first detection polar plate, a second detection polar plate and a compensation polar plate. The first detection polar plate, the second detection polar plate and the compensation polar plate are respectively fixed relative to the position of the mounting seat, the first detection polar plate and the second detection polar plate are arranged at intervals and form a detection capacitor, the dielectric plate is arranged between the first detection polar plate and the second detection polar plate, and the dielectric plate is linked with the rocker to be driven to move relative to the detection capacitor; the compensation polar plate and the first detection polar plate are arranged at an interval and form a compensation capacitor, the relative movement of the dielectric plate and the detection capacitor can cause the capacitance value change of the detection capacitor, and the compensation capacitor can be used for detecting the influence of environmental factors such as temperature and humidity on the capacitance value, so that the detection of the detection capacitor can be compensated. The motion detection precision of the rocker is ensured.

The utility model relates to detection frock technical field provides a kind of reinforcement cage annular reinforcement detection device, including support frame and positioning rod, at least three support rods are equipped in support frame upper end, support rod extends along horizontal direction, each support rod is distributed in radial shape, the axis of each support rod meets in a point;Positioning rod is equipped in support rod, positioning rod is equipped with at least two groups, each of each positioning rod in each group and each support rod one-to-one correspondence, each positioning rod on each support rod is spaced distribution along the axis direction of support rod, the position of each positioning rod on support rod is adjustable along the axis direction of support rod.Such, according to the target diameter of annular reinforcement to be detected, the position of positioning rod is adjusted, so that one group of positioning rod is located on the circumference with target diameter, the detection of the annular reinforcement of one target diameter can be realized.Moreover, different groups of positioning rods can correspond to different target diameters to realize the diameter detection of annular reinforcement of different target diameters.

The invention relates to the technical field of Korla bergamot pear detection, and discloses a Korla bergamot pear organic acid content nondestructive detection method, which comprises: collecting a bergamot pear sample with consistent maturity, no damage and complete surface layer; the surface is wiped with absolute ethyl alcohol and then naturally air-dried, only the surface layer is subjected to vacuum freeze drying and smashing, and the integrity of a main body is reserved; according to the method, ICP-MS, HT-IRMS and GC-MS / EMIS are combined with an HS-HPME extraction technology, multi-dimensional detection of mineral elements, isotope contents and ratios and volatile components is carried out, and an isotope and element characteristic database and a regional characteristic volatile substance fingerprint spectrum are constructed; analyzing and screening characteristic indexes through orthogonal partial least squares, and eliminating interference factors; and establishing a linear discrimination model, forming an organic acid content detection and origin identification integrated technical system, and optimizing detection parameters. According to the method, rapid and nondestructive testing and source area traceability are realized, and reliable technical support is provided for quality evaluation of the Korla bergamot pears.

The application discloses a fan fault detection board and a fan fault detection device. The fan fault detection board comprises a detection unit, a control unit, a state feedback unit, a current limiting unit, a main power input interface, a main power output interface, a fan input interface, a fan output interface, a feedback power input interface, a feedback power output interface, a state feedback power interface and a state feedback output interface. The application can feed back the running state of the fan to the upper computer through the state feedback output interface, for example, normal working of the fan or fault of the fan, so that the detection of the fan fault is realized.

This utility model provides an anti-tilting constant force spring bracket, relating to the field of constant force spring brackets. It includes a housing and a load-bearing plate. The upper end of the housing is connected to the load-bearing plate via a hanging rod. A protective shell is provided on the upper side of the housing. A lifting plate and a main spring are located inside the housing. An adjustment assembly is provided inside the housing, including an adjustment plate slidably connected inside the housing. A pressure sensor is installed between the upper side of the adjustment plate and the lifting plate. An adjustment threaded rod is rotatably connected to the lower side of the adjustment plate. A fixing hole, a guide groove, and a storage groove are provided on the upper side of the load-bearing plate. The guide groove is located outside the storage groove, and the fixing hole is located outside the guide groove. A fixing clamp is provided at the bottom of the storage groove, and a movable clamp is slidably connected to the upper side of the fixing clamp. This utility model provides two different methods for fixing the load and achieves accurate adjustment of the main spring preload based on the weight of the load and the pressure sensor.

The utility model provides a crystal oscillator air tightness detection device comprising a detection box, the top of the detection box is fixedly provided with a mounting rack, the mounting rack is fixedly provided with a placing mechanism, and the bottom of the placing mechanism is fixedly provided with a clamp used for placing a crystal oscillator; an extrusion mechanism is arranged in the detection box, in the process that the clamp is driven into the detection box by the placement mechanism and the extrusion mechanism is driven to operate, the extrusion mechanism extrudes liquid in the detection box into the crystal oscillator, and the liquid in the detection box is extruded into the crystal oscillator through the extrusion mechanism; by means of the infiltration capacity of liquid to gaps of the crystal oscillator under the pressure effect, the tiny gaps of the crystal oscillator and the potential air tightness problem can be effectively detected, gas in the crystal oscillator can be squeezed out to form bubbles after the liquid is poured, and whether the air tightness of the crystal oscillator is intact or not can be visually and accurately judged by observing the generation condition of the bubbles.

This application provides a method, apparatus, and electronic device for adhesive path detection. The method first determines the adhesive path control for detection. The adhesive path control includes a center line and at least three detection line groups. Each detection line group includes two detection lines, with the center line located between these two detection lines. The interval between the two second detection lines in the second detection line group is greater than the interval between the two first detection lines in the first detection line group, and the interval between the two third detection lines in the third detection line group is greater than the interval between the two second detection lines. The adhesive path control is drawn on a template image including the template adhesive path, with the center line located at the center of the template adhesive path. The edge of the template adhesive path is located between the second and third detection lines, with the third detection line located outside the template adhesive path. The adhesive path control in the template image is mapped to the image to be tested. Based on the positional relationship between the adhesive path to be tested and the adhesive path control, it is determined whether there are adhesive path defects in the adhesive path to be tested, thus meeting the requirements of adhesive path detection.

The application discloses a kind of ultrasonic testing devices for boiler turbine, belong to boiler turbine detection device technical field.It includes cross rail, the cross rail quantity is two, and U-shaped guide frame is jointly slidably installed, and ultrasonic detector is fixed on the U-shaped guide frame by screw, by the horizontal movement of U-shaped guide frame on cross rail, the circumferential motion of slide along arc gear rack and the angle adjustment of flaw detection mechanism, the detection of boiler turbine multidirectional, multi-angle can be realized, expands detection range, can effectively detect the area that traditional method is difficult to reach, flaw detection probe is self-adapting closely attached to the surface of detection component, improve detection precision, operator can easily realize horizontal movement, rotation and angle adjustment operation by controller, simple and convenient, improve detection efficiency, and accurate transmission mechanism and control mode can ensure the accuracy and stability of detection device in movement process, further improve the reliability of detection result.

A multi-channel microfluidic label-free pathogen detection system and method with internal reference correction is disclosed, relating to the field of pathogen detection. The method includes: acquiring the initial interference spectrum of each functional detection region before the reaction; injecting the sample to be tested and distributing it to multiple parallel microfluidic channels according to a preset flow path; specific binding of the target pathogen to the aptamer to form an aptamer-pathogen complex layer; acquiring the post-reaction interference spectrum of each functional detection region, comparing the post-reaction interference spectrum with the initial interference spectrum before the reaction, and calculating the change in optical path difference of each functional detection region; calculating the target detection signal and comparing it with a standard curve to obtain the concentration of the target pathogen in the sample. This invention achieves continuous, accurate, and repeatable spectral acquisition of multiple functional detection regions, without the need for nucleic acid amplification or labeling, realizing multi-channel parallel, automated acquisition, internal reference correction, and quantitative analysis of pathogen concentration, thus improving the accuracy and reliability of the detection results.

This invention discloses a method and system for detecting abrupt temperature changes in lake water. The method includes: acquiring daily time-series data of lake water temperature and calculating the diurnal temperature variation range to obtain a maximum temperature rise sequence and a maximum temperature fall sequence; calculating the quantile thresholds corresponding to the maximum temperature rise and maximum temperature fall sequences to obtain a temperature rise threshold sequence and a temperature fall threshold sequence; and detecting two types of abrupt temperature change events—cold-to-warm and hot-to-cold—based on these sequences, calculating the frequency, duration, intensity, and speed of occurrence of each event, thereby achieving the detection of abrupt temperature changes in lake water. This invention can characterize the rapid change process of lake water temperature on a daily scale, enabling systematic detection and multi-dimensional feature quantification of abrupt temperature changes in lake water. As a method and system for detecting abrupt temperature changes in lake water, this invention can be widely applied in the field of water body monitoring technology.

The application relates to the technical field of liquid metering, in particular to a liquid detection device for an underground storage tank. The device comprises a shell, a placing chamber arranged in the shell, a wire through hole arranged on the shell and communicating with the placing chamber and the outside of the shell. A wire wheel is arranged on the shell, and a wire is wound around the wire wheel. A sensor assembly is arranged on the wire. A coding wheel group is arranged on the shell and used for guiding the wire. A detection unit for detecting the length of the wire is arranged on the coding wheel group. A control assembly comprises a driving unit, a measurement setting unit and a control unit. The driving unit is controlled by the depth position parameter set by the measurement setting unit and the length of the wire detected by the detection unit, so that the wire is lowered to a corresponding depth. The control assembly cooperates with each component to automatically control the wire to be lowered to a set depth, realize the detection of liquid at different depths, and greatly reduce the labor cost and improve the detection efficiency without manual sampling.

This invention discloses an intelligent edge-rolling device for steel door panels, applicable to the field of steel door panel edge rolling. It includes a limiting component comprising a first rotating shaft and a second rotating shaft. The first rotating shaft has two sets of threads with opposite directions. Each set of threads on the first rotating shaft is threaded with a baffle. An arc plate is installed on the same side of each baffle. A support plate is installed on the side of each baffle away from the arc plate. Three mounting slots are provided on the support plate. A square frame is installed on the side of the support plate away from the baffle. The central area of ​​the square frame is hollow. A movable frame 1 is installed on the upper half of the square frame, and a movable frame 2 is installed on the lower half. The structure of the second rotating shaft is the same as that of the first rotating shaft, and the second rotating shaft passes through the square frame. The two sets of square frames are respectively connected to the threads of the second rotating shaft with different directions of rotation. This invention features high-efficiency detection during panel edge rolling.

This invention provides a rapid colorimetric reagent for the detection of manganese and iron ions. The reagent consists of carbon dots, a 3,3′,5,5′-tetramethylbenzidine solution, and a phosphate buffer solution. The reagent itself is a brown, transparent solution. When manganese ions are added to the 3,3′,5,5′-tetramethylbenzidine solution and phosphate buffer solution, it turns blue (visible to the naked eye) upon irradiation with a 365 nm UV lamp; upon contact with iron ions in the 3,3′,5,5′-tetramethylbenzidine solution, it turns dark green (visible to the naked eye). This reagent exhibits an extremely low detection limit and good selectivity. The detection process does not require complex analytical equipment, enabling rapid trace detection of manganese and iron ions. The reagent is simple to prepare, overcoming the shortcomings of cumbersome and expensive synthesis of manganese and iron ion detection probe molecules, and providing effective technical support for trace detection in food safety.

The invention relates to the technical field of audio signal processing, and provides an audio noise reduction result detection method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining a first time-frequency feature data pair corresponding to homologous double-channel audio data; performing time sequence alignment on the first time-frequency characteristic data pair to obtain a second time-frequency characteristic data pair after time sequence alignment; generating audio input data based on the second time-frequency characteristic data pair; inputting the audio input data into a deep learning model, outputting a first quality parameter through a regression head of the deep learning model, and outputting text diagnosis information through a generation head of the deep learning model; and based on the first quality parameter and the text diagnosis information, determining a detection result of noise reduction of the audio data. According to the embodiment of the invention, the method achieves the detection of the audio noise reduction result under the condition of no clean reference audio, and improves the detection universality of the audio noise reduction result and the interpretability of the detection result.

The utility model provides a wafer cassette internal pollution detection device, and relates to the wafer cassette detection device field, the wafer cassette internal pollution detection device comprises a pedestal, the upper end of the pedestal is connected with a side plate, the upper side of the pedestal is provided with a detection rack, the inner side of the side plate is slidingly connected with a detection assembly, the detection rack comprises a fixed rack, the inner side wall of the fixed rack is provided with a limiting strip, and the limiting strip is connected with the detection assembly. A groove plate is arranged on the upper side of the fixing frame, a measuring plate is slidably inserted into the upper end of the groove plate, a limiting plate is arranged at the top of the measuring plate, the detection assembly comprises a lifting plate, the outer end of the lifting plate is connected with a mounting plate, and a dust detector is mounted on the upper side of the mounting plate. And the outer end of the dust detector is connected with a detection probe through a wire. According to the utility model, pollution detection can be conveniently carried out on the surface of the slot on the inner side of the wafer box, and meanwhile, the appearance of the wafer box can be conveniently detected.

The invention relates to the technical field of machining, in particular to automobile part pipe textile fabric detection equipment which comprises a detection box, a feeding inlet is formed in one side of the detection box, a discharging outlet is formed in the other side of the detection box, a detection probe is arranged in the detection box and faces a pipe fitting, and the detection probe is arranged in the detection box. A detector is arranged on the upper side of the detection box and is used for acquiring and comparing signals of the detection probes. The detection probe can be used for detecting the pipe fitting, the detector obtains a signal of the detection probe and compares the signal with a set normal textile fabric image, and whether the textile fabric has flaws or not can be judged, so that the function of detecting the textile fabric of the automobile accessory pipe is realized, and the pipe fitting conveniently enters and exits from the detection box through the feeding port and the discharging port.

This utility model discloses an auxiliary tool for detecting internal blind holes, including an inner lever, an outer lever, a tension spring, and a support frame. The inner and outer levers are arranged in an X-shape, and the rear parts of the inner and outer levers are hinged together by a movable pin, which is mounted on the support frame. A tension spring is located at the front of the support frame, with its two ends fixedly mounted at the front ends of the inner and outer levers, respectively. A drive mechanism for driving the inner and outer levers to open outwards is located at the rear of the support frame. This utility model utilizes the principle of synchronous lever extension and retraction, employing a push rod to support the synchronous extension and retraction of the levers. When the detection head contacts the inner wall of the internal blind hole, the position of the push rod is locked, realizing the detection of the internal blind hole. It mainly solves the problem that current standard inspection tools cannot detect the diameter of internal blind holes, and has the advantages of simple structure and convenient operation.