151results about How to "Meet measurement needs" patented technology

Provided are a communication method, a terminal device and a network device, the communication method comprising: a terminal device receiving first information sent by a network device, the first information comprising a synchronization signal broadcast channel block (SSB) measurement timing configuration (SMTC), the SMTC being used for detecting an on-demand SSB. Therefore, the terminal equipment can execute the measurement operation for the on-demand SSB by using the SMTC, and the measurement requirement of the on-demand SSB is met.

The utility model belongs to the field of spectrum confocal measurement, and particularly discloses a spectrum confocal measurement device which comprises an area array illumination assembly, a light splitting element, a dispersion objective lens assembly and a multi-CCD area array imaging assembly. The light splitting element transmits the surface incident light output by the area array illumination assembly to the dispersion objective lens assembly; the dispersion objective lens assembly disperses and unfolds light with different wavelengths in a plurality of wavebands in transmitted incident light, so that the light with different wavelengths is focused at different heights of an object to be measured at the same time, and reflected light with at least one waveband reflected by the surface of the object to be measured is received and emitted to the light splitting element; the light splitting element reflects the reflected light to the multi-CCD area array imaging assembly; the multi-CCD area array imaging assembly comprises a plurality of light splitting assemblies and a plurality of imaging assemblies, the plurality of light splitting assemblies divide reflected light into multiple paths of wave band light in different wavelength ranges, and the plurality of imaging assemblies receive the multiple paths of wave band light and carry out imaging. According to the utility model, wide-range, high-efficiency and high-precision detection can be realized.

The invention discloses a measurement configuration parameter determination method and device and a storage medium. The method is applied to network equipment. The network equipment is arranged on a satellite; the method comprises the following steps: determining K measurement configuration parameters associated with K sub-regions in a first region set to obtain a configuration parameter set; wherein the K sub-regions in the first region set are obtained by dividing a signal coverage region of the network equipment by the network equipment; k is an integer greater than or equal to 2; and sending at least one measurement configuration parameter in the configuration parameter set to a terminal device in communication connection with the network device, so that the terminal device executes cell measurement based on the at least one measurement configuration parameter.

The invention belongs to the field of acoustic speed measurement, and particularly relates to a combined cycle waste heat boiler inlet flue gas flow velocity acoustic monitoring system and method, and the system comprises a pneumatic sound source device which is used for generating a pneumatic sound wave signal and transmitting the pneumatic sound wave signal into a flue gas pipeline; the sensor system is used for collecting pneumatic sound wave signals sent by the pneumatic sound source device and obtaining downwind propagation sound wave signals and upwind propagation sound wave signals through the pneumatic sound wave signals; the pneumatic sound wave signal processing system is electrically connected with the sensor system and is used for calculating the gas flow rate on a corresponding path according to the downwind propagation sound wave signal and the upwind propagation sound wave signal collected by the sensor system and displaying a measurement result; the sensor system is provided with one transmitter and two receivers, the propagation velocities of sound in downstream and countercurrent can be obtained at the same time, the influence of sound velocity change on a time difference method is avoided by using the principle that the sound velocity is different in downstream and countercurrent conditions, and the requirement for measuring the outlet flow velocity of the gas turbine is met.

The invention discloses a part size detection method based on image recognition, which comprises the following steps of: generating a plurality of two-dimensional images with different shadow shapes, recognizing and extracting boundary information and shadow information of a part in the two-dimensional images to obtain the shadow information and normal direction of the part in the two-dimensional images, constructing a three-dimensional image of the part, and detecting the size of the part according to the three-dimensional image. Therefore, the accurate size information of the part can be accurately recognized, the part size measurement precision is improved, the measurement efficiency is further improved, the continuously changing measurement requirements are met, and meanwhile, the normal direction is obtained by recognizing and extracting the boundary information and shadow information of the part in the two-dimensional image, so that the measurement accuracy is improved. And the normal direction information forms a normal field of the part surface, the inclination degree and the shape change of the part surface are known, and the orientation and the concave-convex condition of the part surface are determined, so that the precision of subsequently constructing a part three-dimensional model is further improved, and the measurement efficiency is further improved.

The invention discloses a preparation method of a large-area decoupling type fiber grating sensor based on an island bridge structure, and the method comprises the steps: firstly carrying out the peripheral pre-stretching of an elastic substrate, and then bonding a plurality of carbon fiber composite sheets which are arranged in a matrix manner on the elastic substrate in a pre-stretching state, a fiber grating and a fiber grating wrapped by glass fiber are respectively bonded and fixed on the two rows of fiber positioning grooves of each row of carbon fiber clad sheets, each fiber grating is provided with a grating point in the groove of each carbon fiber clad sheet, and each groove of each carbon fiber clad sheet is filled and cured; finally, after the elastic substrate is pre-stretched and released, the top surface of the elastic substrate is covered with an elastic top sealing layer, and therefore the large-area decoupling type fiber grating sensor is formed. The large-area decoupling fiber grating sensor prepared by the invention can still obtain a high-precision measurement result when facing high mechanical stress and dynamic deformation.

The invention discloses a tire printing ink mark identification method and device and a medium, and the method comprises the steps: scanning an original image of a printing ink mark, and carrying out the preprocessing of the scanning image of the printing ink mark, so as to obtain a preprocessed mark image; the preprocessing comprises color model parameter adjustment, median filtering processing and binarization processing; fitting impression contours corresponding to all impression areas in the impression image, and generating an adjusted impression contour in response to a dragging operation of a user for the impression contours; taking all the adjusted impression contours as a whole, fitting a minimum circumscribed polygon corresponding to the impression contour whole, and automatically extracting impression geometric features; and in response to a selection operation of a user for the measurement points, determining a corresponding target measurement point, and based on the minimum circumscribed polygon, calculating the print length of the position where the target measurement point is located.

The utility model discloses a civil engineering measurement device for an engineering field, and belongs to the technical field of civil engineering measurement. Comprising a pedestal, a storage cylinder, a telescopic rod, a cylinder seat, supporting legs and a supporting disc, a surveying instrument is installed on the top face of the pedestal, and a plurality of holding rods are fixed to the outer side of the bottom of the storage cylinder and the outer side of the pedestal at intervals; a first locking bolt is arranged on the storage cylinder; the top of the telescopic rod is screwed to the inner side of the storage cylinder; the first locking bolt is screwed with the telescopic rod; a bolt section is fixed at the bottom of the telescopic rod; a through hole is formed in the center of the bottom of the cylinder seat; an inner clamping groove is formed in the inner side of the cylinder seat, and the holding rod and the storage cylinder pass through the inner clamping groove in a sliding manner; a plurality of hinge seats are fixed on the upper part of the peripheral cylinder seat at intervals, and outer clamping grooves are pressed on the lower parts of the hinge seats of the cylinder seat; the civil engineering measuring device used for the engineering field can provide various supporting measurement modes, meet various measurement requirements and improve the measurement efficiency.

The invention discloses an intermediate-frequency surface shape white light interference splicing measurement method based on polynomial filtering. The method comprises the following steps: carrying out white light interference splicing measurement on an X-ray plane mirror to obtain a group of interference measurement surface shape results with overlapped adjacent sub-aperture space positions; fitting the surface shape result of each sub-aperture by using a Legendre polynomial to obtain a polynomial coefficient under a preset order; fitting according to a polynomial coefficient to generate a fitting surface shape of a corresponding order, and subtracting the fitting surface shapes of all orders from the measurement result to obtain a group of surface shape results subjected to Legendre polynomial filtering; and splicing the filtered shape results according to a least square algorithm to obtain a final measurement result. The method aims at meeting the splicing measurement of sub-nanometer PV precision required by the intermediate-frequency surface shape error detection of the X-ray plane mirror, the least square optimization splicing method is used, the method is not limited by the low-frequency characteristic of the measurement error of the white light interferometer, and the precision and flexibility of the splicing measurement are improved.

The present invention relates to a method for accurately measuring the surface contour of a cabin section based on line laser. The steps are as follows: first, the equipment needs to be pre-processed before measurement, including the creation of a base coordinate system, global calibration, camera calibration, and calibration of the laser light plane; then the cabin section is dynamically measured, and during the measurement process, all light planes do not need to be adjusted in one plane. Image processing algorithms such as image enhancement, grayscale centroid method, and flood filling method are used to obtain the final center point of the light strip, and the three-dimensional point cloud of the light strip in the base coordinate system is obtained by using the principle of laser triangulation. The three-dimensional point cloud is "cut" along the Z-axis direction of the base coordinate system to obtain the cross-sectional point cloud data of any contour of the cabin section, and the cross-sectional point cloud data is processed to obtain a series of parameters such as the cabin section coaxiality. The method of the present invention overcomes the interference of factors such as reflection of ambient light and laser ghosting light, is simple to operate, has high measurement accuracy, and can realize rapid measurement and analysis of cabin sections.

The utility model provides a kind of wheel riser area deformation measurement equipment, belong to wheel processing technical field, including workbench, and the positioning part for positioning wheel is respectively provided with detection mechanism on workbench;Detection mechanism includes support column, rotating component, translation component and detection component, support column is vertically fixed in the upper end surface of workbench, rotating component is set to the top of support column, translation component is set to rotating component, detection component is installed on translation component;Positioning part includes positioning column, positioning column is vertically set to the upper end surface of workbench and located in the side of support column, positioning column is positioned in the below of detection component with the spoke surface of wheel upwards for wheel.This wheel riser area deformation measurement equipment provided by the utility model fundamentally solves the problem of poor adaptability of existing equipment, so that the equipment can meet the measurement needs of various specifications of wheel, with wide versatility and high flexibility.

The application provides a VISA library running method and device based on an ARM embedded platform, and relates to the technical field of testing and measurement, and comprises the following steps: initializing a layered architecture of a VISA library; the layered architecture of the VISA library comprises an application layer, an API interface layer, a core logic layer, a hardware abstraction layer and a driver layer; discovering and establishing a communication session connection with at least one measuring instrument; wherein a session attribute and a preset attribute associated with a data reading operation are included in a session structure body of the communication session; setting at least one preset attribute for the VISA library; sending at least one control command to a target measuring instrument; wherein the target measuring instrument comprises at least one; reading response data for the control command from the target measuring instrument based on the preset attribute and writing the response data into a buffer; and closing the communication session established with the at least one measuring instrument, so as to alleviate the technical problem that the VISA library is difficult to meet the requirements of an embedded application scenario in high performance.

The invention discloses a current measuring device with fA-level precision. The current measuring device comprises a current sense circuit unit, a pre-voltage amplifier unit, a precision ADC circuit unit, an isolation interface circuit unit and a high-stability reference circuit unit, and the high-stability reference circuit unit provides high-stability reference voltage for ADC conversion and analog circuit comparison; the low-noise power supply unit is used for providing a stable low-noise power supply for any other units; the LO signal interface unit is connected to a voltage source or an analog ground according to a measurement mode; and the HI signal interface unit is directly connected to the equipment to be tested and is used for measuring the current passing through the DUT. The current sensing resistor is a core component of a current sense circuit and generally has a very high resistance value so as to ensure that a voltage signal which is strong enough is generated when small current is measured, so that amplification processing of a post-stage circuit is facilitated, and the signal-to-noise ratio is improved.

The utility model provides an anchor cable drilling angle measuring device which comprises three measuring rods which are arranged side by side in parallel and are adjustable in length, a locking mechanism which is arranged on the measuring rods and is used for fixing the length of the measuring rods, and a plurality of positioning pieces which are arranged along the length direction of the measuring rods, the adjusting mechanism is connected to the end portion of the measuring rod and used for adjusting the diameter of the positioning piece, the protractor is arranged at the end portion of the adjusting mechanism in the axis direction of the measuring rod, and the plumb bob assembly is connected with the center point of the protractor. A stable system is formed among the measuring rod, the positioning piece and the drill hole, it can be ensured that the measuring device and the drill hole are in a coaxial state, measurement errors caused by shaking or deviation of the device are effectively prevented, the accuracy and reliability of measurement are improved, the protractor is used in cooperation with the plumb bob assembly, and the measuring accuracy and reliability are improved. The angle measurement is more visual and accurate, the operation is simple, and the measurement working efficiency is improved.

The utility model discloses a fast locking adjustable building measuring scale, and specifically relates to the measuring scale technology field, the fast locking adjustable building measuring scale comprises a first scale body, one side of the first scale body is fixedly provided with a connecting column, the surface of the connecting column is sleeved with a second scale body, two ends of the connecting column are fixedly provided with limiting discs, and one side of the second scale body is provided with a locking mechanism. The locking mechanism comprises an L-shaped fixing block fixedly arranged on one side of the second ruler body, a sliding groove is formed in the L-shaped fixing block, a cross-shaped sliding block is arranged in the sliding groove in a sliding mode, a fixing plate is fixedly arranged at the bottom of the cross-shaped sliding block, and a limiting rod is fixedly arranged in the fixing plate. According to the utility model, the angle between the first ruler body and the second ruler body can be flexibly adjusted to adapt to different measurement scenes, unlocking and locking can be rapidly realized, the angle stability during measurement is ensured, and the practicability and reliability of the measuring ruler in the aspect of length adjustment are enhanced.

The present invention relates to the technical field of flow detection, and specifically to a flow detection system and a maintenance method thereof. The flow detection system includes a mounting adapter, a rectifier box, an electromagnetic flowmeter and a water outlet elbow. The rectifier box is located on one side of the mounting adapter, and an opening is provided at the top thereof. A drainage pipeline is provided on one side thereof, and a functional sensor is integrated therein; the electromagnetic flowmeter is fixed on the drainage pipeline on one side of the rectifier box; the water outlet elbow is provided on one side of the electromagnetic flowmeter and away from the rectifier box, and the opening of the water outlet elbow is provided toward the top. The electromagnetic flowmeter has many advantages such as non-contact measurement, low requirements for the measured medium, wide measurement range, and high accuracy, and is widely used in various sewage flow measurement occasions. However, the electromagnetic flowmeter can only measure full pipe flow, and the sewage pipe is usually designed to be non-full pipe. By providing a water outlet elbow, the opening of the water outlet elbow is provided toward the top, so that the pipe is full of pipe flow, which meets the measurement requirements of the flow sensor.

The utility model discloses a portable dry shrinkage experimental device, which comprises a weight measuring device, a carrying disc, a supporting rod and a displacement measuring device, the displacement measuring device can slide in the axial direction of the supporting rod, the measuring requirements of experimental samples of different sizes can be met, meanwhile, all the components are movably connected and can be stored respectively after being detached, the storage space is reduced, the portability is improved, drying shrinkage measurement can be carried out in various environments, and the measuring efficiency is improved. The dial indicator can ensure the accuracy of experimental results and reduce errors; and the electronic weighing instrument capable of automatically weighing is adopted as the base, so that the process of repeatedly weighing the sample before and after each experiment is reduced, the experiment precision is improved, and the operation steps are simplified. The device is small and exquisite in structure and low in manufacturing cost, can meet experiment requirements under various conditions, and solves the problems that an existing laboratory contractimeter is large in size, high in price and not suitable for being repeatedly carried to meet the experiment requirements of various environments.

The utility model provides an external gate opening measuring device for a hydraulic hoist, which comprises a first fixed slide rail hoop, the first fixed slide rail hoop is fixedly connected with the front end of a cylinder body of the hydraulic hoist, and an external sliding opening device is selectively mounted on the first fixed slide rail hoop in a matched manner through a slide rail ring. A rope collecting device is installed at the front end of the external sliding opening device and fixedly connected with an extension rod through a steel wire rope, the bottom of the extension rod is installed on a second fixed sliding rail hoop in a sliding fit mode, and the second fixed sliding rail hoop is fixedly connected with the front end of a hydraulic hoist push-pull rod. The external opening degree measuring device has the advantages that the external opening degree measuring device can be longitudinally and transversely adjusted by adjusting the installation position, the problem of accurate measurement of the opening degree of the gate can be effectively solved, reliability is improved, and meanwhile due to the fact that the opening degree measuring device is external, maintenance time can be effectively shortened.

The utility model relates to municipal works pipe jacking construction technology field discloses a kind of folding linear pipe jacking line shape measuring devices, including clamping mechanism, folding ruler, adjustable target and the telescopic fixing mechanism for locking the included angle between clamping mechanism and folding ruler;The clamping mechanism is used to clamp the measuring device in the end of pipe wall two sides of construction pipe jacking;Folding ruler one end articulates clamping mechanism;Folding ruler is provided with recess along length direction, and folding ruler is divided into several short rulers, and short ruler is connected with hinge;Laser source and reflector are provided on the adjustable target, and adjustable target is embedded recess to form sliding connection;The telescopic fixing mechanism includes telescopic link and first fixed bolt.The utility model integrates clamping, extension, measurement, target and locking function in one, adapt to the narrow space limit of construction;The short ruler design of folding ruler meets different pipe diameter measurement demand;Telescopic link adjusts included angle, ensures that folding ruler is perpendicular to pipeline axis, reduces inclination error.

The present invention relates to the field of laser interferometer measurement technology, and discloses a large-length dynamic calibration device based on synchronous measurement of a laser interferometer, comprising a base, a support frame is arranged on the top of the base, a fixed block is fixedly connected to the top of the base and the bottom of the support frame, a docking block 1 is fixedly connected to one side of the fixed block, a docking block 2 is fixedly connected to one side of the fixed block, a rotating column is rotatably connected inside the docking block 2, a connecting rod is fixedly connected to the outer wall of the rotating column, one end of one connecting rod is rotatably connected to another connecting rod, a slider is rotatably connected inside the connecting rod, and a limiting block is arranged between the docking blocks 1. Through the cooperation between the docking block 1, the connecting rod and the limiting block and other components, an efficient double-layer shock-absorbing and buffering effect is achieved, so that the vibration energy is absorbed and dissipated layer by layer through the multi-stage buffer structure, which significantly reduces the impact of vibration on the internal structure and performance of the equipment.

The present invention relates to a compression deformation test device and method for refractory fiber products, the device comprising a fixed frame, a mobile frame, an oil hydraulic press, an upper ball seat, a force sensor, a support column, a lower ball seat, a sample loading platform and a displacement measuring device; the fixed frame is provided with a fixed top plate and a fixed bottom plate, and the mobile frame is provided with a mobile top plate and a mobile bottom plate; an oil hydraulic press, an upper ball seat and a force sensor are sequentially arranged between the fixed top plate and the mobile top plate from bottom to top; between the mobile bottom plate and the fixed top plate, a support column, a lower ball seat and a sample loading platform are sequentially arranged on the top of the mobile bottom plate from bottom to top; displacement measuring devices are respectively arranged on both sides of the mobile frame in the fixed frame, and the displacement measuring devices are 2 or 4, and are arranged with the sample loading center line as the symmetry axis. The present invention can accurately test the compression deformation characteristics of heat-insulating refractory products with large compression deformation characteristics, such as refractory fiber products, and provide reliable technical parameters for the furnace body design of industrial furnaces.

The invention discloses an aspheric optical element surface shape detection device and method, and belongs to the technical field of optical element detection. The detection device comprises a laser light source, a first beam splitter, double CGHs, two Twyman Green interference modules and a supporting table. The detection method comprises the steps of S1, stabilizing a light source; s2, adjusting a detection device; s3, phase shifting is carried out; s4, collecting an interferogram; s5, integrating the information; and S6, switching the element to be tested. The adjustable wavelength laser is used as a laser light source, and the measurement requirements of different materials can be met by adjusting the wavelength; the double CGHs capable of generating two different wavefronts at the same time are used for meeting the surface shape measurement requirement of an optical element composed of any two aspheric surfaces. According to the invention, a double-CGH and optical fiber simplified double-channel interference system design is used, the possibility of cross interference is reduced, the optical configuration and adjustment difficulty are simplified, the surface shape measurement requirements of various materials can be met, and high-precision, high-performance and universal surface shape measurement of an optical element formed by any two aspheric surfaces can be realized.

The utility model discloses a kind of self-calibration oil water content measuring devices, belong to oil-water mixed fluid measurement field, including flow computer, fluid inlet pipeline, fluid outlet pipeline, electric three-way valve and measuring assembly, the three interfaces of electric three-way valve are respectively communicated with fluid inlet pipeline, fluid outlet pipeline and measuring assembly, the measuring assembly includes respectively with electric three-way valve two interfaces intercommunication measuring tube one and measuring tube two, the measuring tube one outside is wound with electric heat tracing band, the top of measuring tube one and measuring tube two is respectively equipped with insertion rod type oil water content measuring instrument one and insertion rod type oil water content measuring instrument two, the measuring tube one and measuring tube two are communicated by connecting pipe one, one-way valve is equipped on the connecting pipe one, the measuring tube two is communicated with fluid outlet pipeline by connecting pipe two. The utility model has both sampling static measurement and continuous measurement, two kinds of modes can be carried out simultaneously, also can be carried out separately.

The utility model discloses a crack sensing sensor based on optical fiber sensing, and belongs to the technical field of civil structure health monitoring. The problems that the testing precision of an existing crack measuring device is extremely prone to being interfered by the surrounding environment, and the measuring precision is low are solved. The optical fiber grating sensor comprises a mounting shell, a cantilever beam and an optical fiber grating, the mounting shell is of a cavity structure with a fixed connecting end and a stretching movable end, and the fixed connecting end and the stretching movable end can slide relatively; the cantilever beam is of a long-strip-shaped structure with elastic deformation and resilience capacity, the cantilever beam is horizontally arranged in a cavity of the installation shell, the length direction of the cantilever beam is the same as the moving direction of the stretching movable end, the tip end of the cantilever beam is fixedly connected to the fixed connecting end, and the tail end of the cantilever beam abuts against the stretching movable end and is in a bent state. The fiber bragg grating is installed on the cantilever beam, and the length direction of the fiber bragg grating is consistent with the length direction of the cantilever beam. The device is mainly used for measuring cracks in the road surface and the roadbed.

The present invention belongs to the technical field of student equipment, and discloses a student test system and method for dynamic characteristics of a cantilever steel beam. The bracket is welded into a non-column vertical structure by steel, and a bottom plate is welded at the bottom and placed directly on the ground; a displacement test meter fixture includes a magnet and a folding bracket fixed on the magnet, and the folding bracket is provided with a fixing component for fixing the displacement test meter, and the displacement test meter fixture is directly adsorbed on the bracket by a magnet; the cantilever steel beam is clamped between the bracket and the clamping plate and reinforced and stabilized by high-strength bolts; the strain gauge is tightly attached to the cantilever steel beam by glue, and the vibration pickup is connected to the cantilever steel beam and connected to a dynamic data acquisition system through a wire; the displacement meter is directly fixed on the displacement meter fixture. The present invention connects the dynamic data acquisition system and the vibration pickup to a computer, which makes up for the shortcomings of the current cantilever steel beam experimental device in colleges and universities being simple in design and staying in a static state, and reduces the gap in engineering site experiments.

The invention discloses an underground bit pressure measuring device and method. In the device, a bit pressure measuring device body is vertically arranged; the parameter measuring module is arranged at the bottom end of the bit pressure measuring device body to measure underground bit pressure parameters, and the electromagnetic wireless transmission and emission module emits the underground bit pressure parameters and corrects emission parameters of the electromagnetic wireless transmission and emission module based on second temperature information. The electromagnetic wireless receiving module receives the transmitted underground bit pressure parameter and corrects the receiving parameter of the electromagnetic wireless receiving module based on the second temperature information, and the pair of clamping blocks get close to each other along with the sliding block so as to clamp the vertical bit pressure measuring device body and get away from each other so as to release clamping of the bit pressure measuring device body; the inserting rod is provided with surface threads in threaded connection with the threaded groove. The device ensures that the measuring device is vertically and downwards installed, and meanwhile signal interference caused by the severe drilling environment is avoided.

The utility model relates to photovoltaic equipment installation technical field discloses an auxiliary measuring tool for photovoltaic installation, including measuring scale, the upper surface of measuring scale is inlayed and is equipped with horizontal bubble disc, the bottom of measuring scale is equipped with three screw thread support legs of triangle distribution, the bottom of screw thread support leg outer surface is connected with internal thread support foot through screw thread adaptation, the middle part of measuring scale upper surface is printed with scale mark along its length direction. This auxiliary measuring tool for photovoltaic installation, through setting up the combination structure of horizontal bubble disc, three screw thread support legs of triangle distribution and internal thread support foot, can quickly adjust the horizontal state of the tool, and horizontal bubble disc can intuitively feedback the inclination, and the triangle distribution of three support legs has stable supporting property, and cooperates the internal thread support foot of screw thread adjustment, can flexibly adapt the installation ground of different flatness, ensures the horizontal accuracy of the measurement datum plane, and provides reliable foundation for subsequent length, angle measurement.

The application discloses a positron annihilation lifetime measurement device and method for thin film sample characterization, which is composed of a positron emitter, a positron detector and a gamma detector; a sample is placed between the positron emitter and the positron detector. The positron emitter contains a radioactive source and is responsible for detecting the positrons entering the sample, and the positron detector is responsible for detecting the positrons penetrating the sample. The gamma detector is responsible for detecting the 0.511 MeV gamma photons generated after the positrons are annihilated. The application can break through the limitation of measuring the sample thickness, is suitable for all types of positron radioactive sources, and sufficiently widens the experimental conditions; meanwhile, the non-contact measurement function can expand the application of the positron annihilation lifetime measurement method in the measurement of special samples and special environments.