32results about How to "Reliable measurement data" patented technology

The invention discloses a ground penetrating radar automatic calibration device which comprises a main frame of a cubic structure, a left side mask and a right side mask which are arranged on the two sides of the main frame respectively, a carrying table arranged in the main frame and used for carrying a radar antenna and a reflecting plate arranged at the top of the main frame, and the bottom measuring face of the radar antenna faces the reflecting plate. Lead screw lifting mechanisms used for lifting the carrying table are symmetrically arranged in the left side mask and the right side mask, four horizontal adjusting sliding rails are arranged on the carrying table in a cross structure, and each horizontal adjusting sliding rail is provided with a horizontal adjusting mechanism used for adjusting the level of the bottom measuring face of the radar antenna. A clamp mechanism guide rail is arranged in the area, located between every two adjacent horizontal adjusting sliding rails, of the carrying table, radar clamps are arranged on the clamp mechanism guide rails, and an antenna thickness equal-height measuring swing arm is arranged in the mask. According to the invention, clamping calibration of radar antennas of various different shapes can be realized, and the use state of the calibrated radar can be judged and evaluated more accurately.

The invention belongs to the field of spiral submerged arc welding pipe manufacturing, particularly relates to a spiral steel pipe blank size real-time detection device and a pipe blank size detection method, and aims to solve the problems of large workload, high adjustment difficulty and inaccurate measurement result caused by frequent disassembly and assembly in the lane changing and shape adjusting process. The device comprises a fixed base, a support, a stand column, a linear sliding table, an annular frame device and a laser distance measuring sensor. By adjusting the angles and the positions of the stand column and the linear sliding table, the circle center of the annular frame device coincides with the circle center of a pipe blank, and then the size of the pipe blank is measured through the laser distance measuring sensor. According to the invention, data measurement is timely, accurate and reliable, and defects of manual measurement can be effectively eliminated; compared with a traditional measuring device, the problems that the workload is large, the adjusting difficulty is high and the measuring result is inaccurate due to the fact that frequent disassembly and assembly are needed in the lane changing and shape adjusting process are solved.

The invention provides a Michelson interference vibration measurement system and a vibration test method, and relates to the technical field of interference vibration measurement, the system comprises a laser, a first spectroscope, a balance detector, a reflective mirror, a movable reflective mirror, an object placing table, a second spectroscope, a photoelectric detector, a camera, a light intensity sensor, a display screen and a demodulator; the laser beam is divided into reference light and measuring light through the first spectroscope; the reference light firstly passes through the balance detector, and phase modulation is carried out on the reference light; the modulated reference light is reflected on a reflective mirror to obtain first reflected light; the measuring light enters the object to be measured to obtain second reflected light; the reflected light forms frequency mixing light in the first spectroscope; the frequency-mixed light enters a second spectroscope to obtain first frequency-mixed light and second frequency-mixed light; the first frequency mixing light can irradiate on the light display screen to display light spots and light intensity values; the second frequency mixing light enters a photoelectric detector; and outputting the measured amplitude of the object to be measured. According to the invention, the vibration displacement of the object is accurately measured.

The invention discloses a system for realizing liquid level calibration of a low-temperature liquid nitrogen biological container through pressure difference. The system comprises a liquid nitrogen container, a nitrogen filling device, an initialization module, a pressure difference measurement module, a liquid level calculation module, a processing module, a communication interface and a display terminal, after the system is initialized, nitrogen with a fixed volume is filled into the liquid nitrogen container through the nitrogen filling device, and the air pressure difference after inflation is measured and recorded; after each inflation, calculating the difference value between the volume of the liquid nitrogen container and the air pressure difference, and organizing into a pressure difference change data set; based on the data set, the liquid level calculation module calculates the relation between the actual volume of the liquid nitrogen container and the liquid level height; the processing module receives the liquid level height information and performs abnormity verification; the communication interface and the display terminal realize visual display of liquid level height information including a real-time curve, an information set and an abnormal alarm; according to the system, the liquid level change in the liquid nitrogen container is indirectly deduced by controlling the volume of filled nitrogen and monitoring the air pressure difference change, and non-contact liquid level calibration is achieved.

The invention discloses a measuring device and method for correcting torsion errors of an inclinometer guide groove, and the device comprises a data collection mechanism, an inclinometer and an inclinometer guide groove torsion angle measuring mechanism which extends into the inclinometer and is connected with the data collection mechanism. A first guide groove, a second guide groove, a third guide groove and a fourth guide groove are sequentially formed in the inner wall of the inclinometer pipe in the circumferential direction at equal intervals. The method comprises the following steps of: 1, burying the inclinometer; 2, mounting a measuring device; 3, measuring the torsion angle of the inclinometer; 4, measuring the displacement of the inclinometer pipe; and 5, carrying out torsion correction calculation on the inclinometer guide groove. The measuring device formed by combining the angle sensor and the sliding guide wheel is matched with the pre-buried inclinometer pipe, the torsion angles of the four guide grooves in each measuring section in the inclinometer pipe can be obtained, the relative torsion deformation angle of each measuring point of the inclinometer pipe is obtained through torsion superposition calculation, displacement errors, measured by the inclinometer, in different directions are corrected, and the accuracy of the displacement errors is improved. The calculation method is scientific and reasonable, and can reflect the real deformation condition.

A laser arc alignment instrument for a fan-shaped section comprises a laser transmitter (1), a laser receiver B (3), a laser receiver A (2) and a computer, and is characterized in that the laser transmitter is provided with a mounting base, the laser transmitter is located at the top end of the mounting base, the laser receiver B is provided with a mounting rod, the laser receiver B is located at the top end of the mounting rod, the laser receiver A is provided with a connecting rod, and the connecting rod is connected with the computer. The laser receiver A is located at the top end of the connecting rod, the connecting rod is a vertical rod and arranged beside the laser receiver B. The computer is a tablet computer, and the tablet computer receives data sent by the laser receiver A and the laser receiver B through Bluetooth and conducts calculation in combination with pre-stored data. The laser arc alignment instrument for the fan-shaped section has the advantages that the laser arc alignment instrument is scientific and reasonable in configuration, high in component integration level, portable to carry, high in working efficiency, low in labor intensity and reliable in measurement data, and the measurement precision meets the requirement.

The application discloses a kind of glass flatness and non-contact laser scanning measurement system of thickness, it is related to glass detection technical field.The present application includes support roll conveying mechanism, light-emitting component, primary mirror, secondary mirror, light-shield steel belt and light image receiving module.Synchronous scanning is realized by servo motor driving primary mirror and light-shield steel belt, so that laser beam moves in the whole area of glass surface and is collected image signal by receiving module.When detecting flatness, light beam is vertically irradiated to glass;When detecting thickness, the light beam offset caused by glass refraction is used to calculate thickness by adjusting the inclination angle of primary mirror.The system uses light-shield shell and light-shield steel belt to isolate external light, improve signal-to-noise ratio and detection accuracy, realize glass flatness defect identification and thickness high-precision measurement.

The invention provides a bean product fermentation maturity determination method and system, and relates to the technical field of bean product fermentation maturity determination. Temperature, humidity, pH value and ammonia gas concentration of a bean product fermentation environment and concentration data of amino acid and short-chain fatty acid in a bean product are monitored in real time, and data preprocessing is performed; constructing a deep learning network, taking the concentrations of the internal amino acids and the short-chain fatty acids as labels for training, obtaining self-influence parameters of the bean products, performing linear regression by utilizing the preprocessed environmental data, calculating environmental influence parameters, and finally combining the self-influence parameters with the environmental influence parameters to obtain the bean products. And comparing the comprehensive judgment value with a set maturity threshold value so as to judge the fermentation maturity condition of the bean product.

The invention discloses a method for long-distance measurement using a laser tracker and a total station by using a parallel control network. The method uses the laser tracker and the total station for joint measurement, giving full play to the respective advantages of the two instruments, and can complete the measurement task of long-distance equipment without complicated adjustment calculations. In addition, the method has been verified by the parallel control network, making the measurement data more reliable and accurate.

The present invention relates to the field of digital measurement technology, and discloses a scanning system, a calibration device for the scanning system, and a calibration method. The scanning system includes a laser scanning head and a binocular tracker, wherein the laser scanning head is configured to detect the surface of a part to be measured placed in a tracking area; a plurality of binocular trackers are provided, the tracking fields of the plurality of binocular trackers are adjacent, and the sum of the tracking fields of the plurality of trackers covers the tracking area; the binocular trackers are configured to track the laser scanning head, and the coordinate information of the laser scanning head acquired by the plurality of binocular trackers is based on a tracking coordinate system. The present invention effectively increases the tracking area by providing a plurality of binocular trackers with adjacent tracking fields of view; the plurality of binocular trackers are based on a tracking coordinate system, and the accumulated error in coordinate conversion between the plurality of traditional binocular trackers is eliminated, and the conversion accuracy between the binocular trackers is effectively improved, which is conducive to ensuring the reliability of the measurement data.

The utility model discloses an excavator arm support symmetry degree detection device, which relates to the technical field of detection devices and comprises a detection table, a mounting groove is formed in the middle of the upper surface of the detection table, a clamping assembly is arranged in the mounting groove, and first sliding grooves are formed in the left side and the right side of the upper surface of the detection table. A detection assembly is arranged on the rear side of the upper surface of the detection table and comprises a portal frame, the bottom of the portal frame is slidably connected to the sliding rails in the first sliding grooves, a second sliding groove is formed in the bottom of the upper end of the portal frame, and a two-way lead screw is rotatably connected into the second sliding groove; the surfaces of the two ends of the bidirectional screw rod are in threaded connection with threaded seats, the bottoms of the two threaded seats are in rotary connection with extension rods, pressure sensors are fixedly installed in the bottoms of the extension rods, and detection probes are fixedly connected to the inner sides of the pressure sensors. According to the scheme, the precision is high, tiny size differences can be captured, and more accurate measurement results can be achieved.

The utility model relates to a pipe section type crude oil water content analyzer which comprises a concentric different-diameter connecting piece, the middle part of the concentric different-diameter connecting piece is a horizontal large-diameter measuring cavity, the left end and the right end of the concentric different-diameter connecting piece are respectively a left-end small-diameter channel and a right-end small-diameter channel, and the upper end of the large-diameter measuring cavity of the concentric different-diameter connecting piece is connected with an upper-end small-diameter channel; the upper end small-diameter channel, the left end small-diameter channel and the right end small-diameter channel are connected with a first flange, a second flange and a third flange respectively; a plurality of measuring probes are arranged in the large-diameter measuring cavity and connected with a processing system provided with an anti-explosion shell. According to the utility model, the measuring cavity is enlarged through reducing, so that the measuring cavity is not easy to block; the measuring probe sheath is fixed through the fixing bracket, which is stable and reliable; the plurality of measuring probes are arranged, so that the measuring precision is greatly improved; the built-in temperature sensor is used for temperature compensation and data correction, so that the measurement precision of the data is further improved; through the installation mode of the upper flange and / or the lower flange, the requirements of different working conditions are met.

The invention discloses a miniaturized logging equipment system which comprises a power amplification module, a driving module, a cylindrical electrode module, a first digital-to-analog conversion module, a second digital-to-analog conversion module, a first processor, a second processor and a communication module. The first processor is sequentially connected with the first digital-to-analog conversion module, the driving module and the cylindrical electrode module; the cylindrical electrode module is connected with the power amplification module; the cylindrical electrode module is connected with the second digital-to-analog conversion module, and the second digital-to-analog conversion module is sequentially connected with the second processor and the communication module; the miniaturized logging equipment system has the advantages of high measurement precision, high stability, reliable measurement data, portability, easiness in operation and the like, and compared with conventional field measurement equipment, the size is reduced by one tenth, and the adaptability is high; the method can be applied to scenes of scientific research, actual teaching and the like, and has wide significance in characterization and evaluation of complex cracks and research of oil and gas characteristics in domestic carbonate rocks.

The utility model relates to rail transit engineering technical field discloses a kind of subway laser chord measurement devices with scale mark, including rail, the top of the rail is slidably connected with laser emission device, the top of the rail is slidably connected with target, the top of the rail is slidably connected with moving target, the inside of the laser emission device is installed with height adjusting mechanism, the target includes lifting device, the bottom of the lifting device is fixedly connected with permanent magnet, the top of the lifting device is provided with grid scale board, the height adjusting mechanism includes rotating handle.In the utility model, the height of laser can be dynamically adjusted according to track settlement and local deformation, so that the laser reference line can be attached to the track measurement reference surface, thereby ensuring the accuracy and reliability of measurement data, providing data support for track maintenance operation, reducing the situation of maintenance not in place and reducing the safety hidden trouble of train operation.

This invention provides a wind tunnel test angle-of-attack adjustment device and its calculation method. The device includes an angle-of-attack mechanism, a suction mechanism, a front wind speed sensing component, and a rear wind speed sensing component. The suction mechanism includes a suction channel and a fan. Both the front and rear wind speed sensing components include a high-sensitivity sensor and a lifting drive component. The front wind speed sensing component also includes a low-sensitivity sensor, located downstream of the suction channel. The high-sensitivity and low-sensitivity sensors are connected to the fan and the lifting drive component via a control unit. The method includes selecting a working sensor based on the test angle of attack adjusted by the angle-of-attack mechanism; setting the target boundary layer thickness and the wind tunnel set flow rate; adjusting the real-time power of the fan; controlling the height of the working high-sensitivity sensor; and obtaining the flow rates of the high-sensitivity and low-sensitivity sensors; adjusting the real-time power of the fan based on the flow rates of the high-sensitivity and low-sensitivity sensors. This invention has advantages such as effectively controlling the boundary layer thickness and improving test accuracy.

The utility model relates to the technical field of sediment thickness detection, and discloses a detection device for sediment thickness in foundation construction, which comprises a connecting rod, two supporting columns are fixedly connected to two ends of the connecting rod, a supporting plate is fixedly connected to the outer sides of the supporting columns, and a motor is fixedly connected to the top of the supporting plate. The outer side of the motor is fixedly connected with a coil, one end of the coil is fixedly connected with a plumb bob, the outer side of the supporting column is fixedly connected with a plurality of sliding plates, and the tops of the sliding plates are fixedly connected with a plurality of supporting columns. According to the utility model, through cooperation of the threaded rod, the threaded plate, the sliding rod, the sliding plate and other structures, contraction and amplification of the device can be conveniently realized, orifices with different diameters can be measured, and compared with the conventional measuring device which can only measure a single orifice, the application range is too limited, the tool cost is increased, and the measurement precision is improved. The device can effectively solve the problems.

The utility model discloses a kind of track vehicle over sub-phase induction receiver height measuring equipment, it includes the fixed frame inserted on steel rail, the top of fixed frame is fixedly connected with longitudinal measuring scale, longitudinal measuring scale surface is slidably connected with transverse measuring scale, transverse measuring scale includes slider that is sleeved in longitudinal measuring scale, slider one side is fixedly connected with metal ruler, the bottom of metal ruler is fixedly connected with level gauge.The equipment can effectively improve the installation size of measuring track vehicle over sub-phase induction receiver, the height of induction receiver distance steel rail can be quickly measured using longitudinal measuring scale, the transverse distance of induction receiver distance steel rail can be quickly measured using transverse measuring scale, it is simple and convenient to use, longitudinal measuring scale surface is also installed with limit magnet, can be well positioned fixed to transverse measuring scale, effectively improve the stability when measuring, ensure that measurement data is accurate and reliable, provide more powerful guarantee for the safe operation of track vehicle.

The invention provides an aircraft part coordinate measurement data temperature compensation system, and the system comprises an environment temperature and humidity monitoring device which is used for measuring the temperature and humidity of a working environment, obtaining the temperature data of the surface of an aircraft part, carrying out the deviation calculation of the environment temperature and the surface temperature of the part, monitoring the constant-temperature state of the part, and outputting the temperature data of the surface of the aircraft part; when the part is in a constant-temperature state, a measurement data temperature compensation value is provided for measurement software; the part temperature monitoring device is used for measuring the surface temperature of the aircraft part; meanwhile, the invention further provides an aircraft part coordinate measurement data temperature compensation method.

The utility model discloses an all-in-one machine testing device, and relates to the technical field of all-in-one machine testing devices. The device comprises a working table, supporting legs are fixedly connected to the bottom of the working table, a supporting ring and a supporting column are fixedly connected to the top of the working table, a clamping plate and a limiting ring are arranged above the working table, a sliding rod is fixedly connected to the inner wall of the supporting ring, and a supporting lug is slidably connected to the outer surface of the sliding rod. According to the utility model, the pull rods are arranged, specifically, sheet articles for friction testing are placed on the surface of the bearing platform, the pull rods on the surface of the bearing platform are sequentially pulled, the first spring is stressed through the pull rods, and meanwhile, the clamping plate is fixed with the pull rods, so that the clamping plate upwards extrudes the second spring to apply acting force to the limiting block; the thin sheets are sequentially placed at the bottom of the clamping plate to be clamped and fixed with the bearing platform, so that the thin sheets are in a stable plane in a friction test project subsequently, wrinkles are avoided, and measured data are real and reliable.

The utility model discloses a device for rapidly measuring the slope ratio of a side slope, and solves the problems of complex operation and low efficiency of a traditional measuring mode. The device is composed of a square shell, a movable rod, a gravity ball, a transparent scale plate and an anchoring assembly. The shell is fixed to a slope through the anchoring assemblies at the four corners of the bottom, the movable rod drives the gravity ball to naturally droop, slope rate data can be directly read through the scale plate on the side wall, measurement only needs 1-2 minutes, and professional leveling calculation is not needed. The electromagnetic adsorption blocks on the inner side of the shell are matched with the buffer pads, gravity balls are adsorbed and fixed during transportation, and collision errors are reduced; and the release is accurate during measurement. An anchoring rod of the anchoring assembly is combined with a spring and a locking groove, and the fixing device can be stabilized in complex terrains. The device is simple in structure, convenient to operate and suitable for slope ratio measurement of geological and municipal engineering slopes.

The utility model provides a kind of space three-dimensional catheter measurement positioning clamping device, is equipped with magnetic base, fixed seat, space angle adjusting mechanism, strut and catheter positioning clamping mechanism;The magnetic base is placed on positioning platform, the fixed seat is sleeved on magnetic base, and space angle adjusting mechanism is equipped on fixed seat;The space angle adjusting mechanism includes chucking seat, compression sleeve, compression sleeve controller and universal ball support arm;The strut both ends are respectively equipped with universal ball support arm's support arm, catheter positioning clamping mechanism, and the joint of space three-dimensional catheter is positioned by catheter positioning clamping mechanism.The utility model can simulate the original machine assembly posture of space three-dimensional catheter, provide reliable measurement data for mathematical modeling, reach the purpose of ensuring that new catheter and original machine catheter shape and size are consistent.

The invention discloses a measuring device based on Valsalva action. The measuring device comprises an expiration pressure test meter, a test board, a plastic cup provided with a bandage, an air suction pipe provided with a first valve and a breather pipe provided with a second valve, the expiration pressure testing meter is vertically fixed on the testing table, a patient wears the cup through the bandage to seal the periphery of the mouth and the nose, the patient can breathe through an inner cavity of the cup, the left end of the breather pipe is communicated with the interior of the cup, and the right end of the breather pipe is communicated with an air inlet in the bottom of the expiration pressure testing meter. The lower end of the air suction pipe is communicated with the breather pipe between the cup and the second valve through a tee joint. The device can prevent air leakage, accurately measure inspiration amount, expiration pressure and maintenance time, improve measurement efficiency and provide accurate diagnosis basis for doctors.

The present invention belongs to the field of bearing performance testing equipment, specifically, a contact angle measuring device based on an angular contact ball bearing assembly line, including a base plate, an air-floating turntable component, a supporting stand, a lifting component, a moving seat, and a measuring component for measuring the contact angle. The present invention uses an air-floating turntable to rotate and drive the bearing to be tested to rotate at a uniform speed, which can reduce the influence of the driving component on the measurement result, thereby making the measurement data more real and reliable, and can eliminate the measurement interference caused by the rotary drive to the greatest extent; through the servo motor and the linear module drive, the moving seat can be accurately controlled to move up and down, and the guide slider combined with the linear module ensures that the vertical Z-direction motion has high linearity, so that the repeatability of the detection position is better; through the overall setting of the measuring component, the impact force of the contact between the measuring component and the bearing to be tested is small, the service life of the sensor is increased, and the vibration is small, thereby also reducing the detection error caused by vibration.

The utility model relates to the field of animal detection, in particular to an animal body length and weight measuring device which comprises a base, a restraining groove, a weight sensor and the like, the restraining groove is formed in the base and provided with a concave part for placing a corresponding animal to be measured in the body length direction, and the weight sensor is arranged in the concave part. The weight sensor is arranged below the restraining groove and located between the restraining groove and the base, scales extending in the length direction of the restraining groove are arranged on the base and / or the restraining groove, and the weight sensor is connected with a display module to display weight information. The body length and the body weight of an animal can be measured at the same time, the convenient measuring function is achieved, and the body state of the animal does not need to be adjusted in the measuring process; besides, the measuring device is provided with the transparent shielding part, and the user can adjust the area of the restraining groove covered by the transparent shielding part by opening the transparent shielding part, so that animals are effectively prevented from escaping or attacking a measurer, interference to animal samples and measuring results can be effectively reduced, and data are more accurate.

The invention discloses a geographic information area measuring device with an identification function, and relates to the technical field of area measurement, the geographic information area measuring device comprises a rotating table, an island table is arranged in the middle of the upper end of the rotating table, a rotating sliding groove is formed between the side wall of the island table and the inner wall of the upper end of the rotating table, and a fixing frame is arranged at the upper end of the island table; four groups of lug blocks are arranged on the side walls of the periphery of the upper end of the rotating table, the lower end of the fixing frame is fixedly connected with the four groups of lug blocks, two groups of side rotating sliding blocks are arranged in the middle of the side wall of the rotating table, a laser transmitter is arranged at the front end of one group of side rotating sliding blocks, and a reflecting plate is arranged at the front end of the other group of side rotating sliding blocks. The geographic information area measuring device with the identification function can automatically move to a specified point position, can automatically adjust the horizontal, height and angle states, carries out measurement through pulse laser, and is more efficient, convenient and rapid in the measurement process.

The utility model discloses a device for measuring heat radiation of an industrial torch. The device comprises a mounting seat and a heat radiation sensor, a first flange plate is arranged at the bottom of the thermal radiation sensor; the first flange plate is fixedly connected to the front side of the mounting seat through a bolt; a cavity is formed in the mounting seat; a first through hole communicated with the cavity is formed in the outer side wall of the mounting seat; and a second flange plate is arranged on the rear side of the mounting seat. The industrial torch thermal radiation value measuring device fills the blank of industrial torch thermal radiation value measuring devices at present in the industry, and is not influenced by combustion components, diffusion flow and natural environment change, so that the real-time thermal radiation value of a certain torch or multiple torches to the surrounding environment can be completely measured for a long time, the measured data is accurate and reliable, and the measurement efficiency is high. And a practical and reliable basis is provided for subsequent reasonable layout of the peripheral equipment house.

The utility model relates to the technical field of coal mining, in particular to a coal mining auxiliary tool based on accurate roadway tunneling. According to the technical scheme, the coal mining auxiliary tool based on accurate roadway tunneling comprises an inserting rod, a base, a laser ranging rod and a fixing column, the inserting rod is arranged at the bottom end of the base, the base is inserted and fixed into a roadway through the inserting rod, a groove is formed in the base, the fixing column is arranged in the groove, and the laser ranging rod is arranged in the fixing column. Laser ranging rulers are fixed on the fixing columns, through holes are formed in the bases and the fixing columns in a penetrating mode, lasers of the laser ranging rulers on the bases at the two ends on the same axis penetrate through the through hole in the base in the middle to ensure the tunneling direction, and meanwhile the tunneling distance is measured through the laser ranging rulers. According to the utility model, the working efficiency, the accuracy and the safety are improved, and meanwhile, the convenience and the stability are realized.

The present invention discloses a synchronous detection and processing method and system for gear shaft fault of a gearbox, wherein the method comprises: S1: a first detection device is set on the inner shaft of the gear, and a second detection device is set on the gear of the gearbox; S2: the first detection device is used to perform high-frequency sampling and acquisition on the inner shaft of the gear without cracks and the inner shaft of the gear with cracks, respectively, and multiple vibration levels are set; S3: the second detection device collects the second signal of the gearbox gear when it runs at different speeds in a wear-free state through high-frequency sampling, and sets the standard range of the second signal at different speeds; S4: during the operation of the gearbox gear, the first signal and the second signal are synchronously collected; S5: whether to alarm or stop the operation. The present invention synchronously detects gear shaft faults of the gearbox, and the two detections are mutually restricted and independent, which can discover and deal with potential safety hazards and avoid secondary injuries.

The invention provides a target locking method of a range finder, a control device, electronic equipment and a storage medium, and relates to the technical field of range finding. The method for locking the target by using the range finder comprises the following steps: measuring a target object at a measurement point by using the range finder to obtain a first measurement distance and a first measurement angle; controlling the range finder to deflect along a preset direction so as to change a real-time measurement angle of the range finder, and acquiring a second measurement distance measured by the range finder on the deflection path and a measurement angle corresponding to the second measurement distance; and comparing the second measurement angle with the first measurement angle, and if the second measurement angle is equal to the first measurement angle, representing that the position of the target object is locked. The target object can be accurately locked, the accuracy of the measurement result is ensured, and the probability of misjudgment is reduced.