119results about How to "Comprehensive measurement data" patented technology

The invention discloses a three-dimensional full-field deformation measurement method of a paddle. The method comprises the following steps of 1), designing and manufacturing an electronic speckle; 2), forming a camera set by means of multiple three-dimensional video units; 3) calibrating the inner diameter and the outer diameter of the camera set by means of a calibrating board with a coding mark point; 4) acquiring an image, realizing image grouping, and performing imaging matching on the grouped image; 5), performing three-dimensional analysis on the image which is matched in the step 4) by means of the inner parameter and the outer parameter of the camera set obtained in the step 3), and obtaining a three-dimensional point cloud of each paddle surface; and 6) based on the three-dimensional point cloud of each paddle surface obtained in the step 5), fitting the profile of the paddle, and obtaining three-dimensional full-field deformation of the paddle. The three-dimensional full-field deformation measurement method can be used for measuring anisotropic three-dimensional full-field dynamic deformation of the paddle and furthermore can be used for obtaining various movement parameters of the paddle. The three-dimensional full-field deformation measurement method has advantages of comprehensive measured data, high measurement accuracy, effective settlement for interference in complicated working conditions, and reliable data in paddle movement process.

The invention relates to a lithium battery SOH estimation and RUL prediction method based on an AST-LSTM neural network, and belongs to the field of lithium battery PHM. The method comprises the following steps: 1) collecting voltages, currents, temperatures and corresponding capacity values of multiple battery charging and discharging periods; 2) constructing a deep AST-LASTM model; and 3) carrying out lithium battery SOH estimation and RUL prediction on the basis of the AST-LSTM neural network. The battery capacity data can be obtained by only measuring voltage, current, temperature and timeof a lithium battery to be detected, the SOH and RUL of the lithium battery are estimated, the measurement process is simple, the error is low, and the precision is high.

The invention provides a catenary geometrical parameter dynamic detection method based on triangulation, and the method is applied to a vehicle-mounted pantograph catenary dynamic monitoring system or a hand-push type catenary patrol detection vehicle. The method comprises the following steps: 1) obtaining pixel coordinates (xPixel, yPixel) of a catenary in an image and angle change (xAngle, yAngle) of a detection device; 2) carrying out data processing: dividing the whole test range into N sections, and carrying out calibration on each section to enable each section to form a group of camera calibration parameters, judging and obtaining the calibration height section of each pixel coordinate according to the pixel coordinates obtained in the step 1), and obtaining stagger value and height value according to the camera calibration parameters of the height section; 3) carrying out data correction: through correction conversion, obtaining actual stagger value and height value of the catenary; and 4) carrying out slope calculation. The method, based on the triangulation principle, can effectively detect the height, stagger value, distance between two lines and slope of the catenary, thereby ensuring measurement accuracy in the whole range, and eliminating large-range error.

The invention discloses a wind power plant remote real-time monitoring system and method based on a wireless sensor network. The system comprises wireless sensor nodes, a base station, a monitoring center and a mobile monitoring device. The wireless sensor nodes are installed on a wind driven generator and are responsible for obtaining operation data of a wind power plant, wherein the operation data includes status data of the wind driven generator and meteorological data of the wind power plant. Each sensor node has a unique ID number address. The base station is responsible for two-way information interaction between the monitoring center and the wireless sensor nodes. The monitoring center collects measuring data of the wireless sensor network and analyzes, processes, stores and displays the data. The mobile monitoring device obtains various kinds of operation status information of the wind power plant at any time and any place through the wireless network. The system has the advantages of being small in size, easy to install and maintain, easy to expand and flexible in communication and facilitating monitoring, and can remotely monitor the wind power plant in real time.

The invention provides a laser radar calibration device and method, and belongs to the technical field of a laser radar system. The laser radar calibration device comprises reflection units, adjustment mechanisms and a control unit, the distances between the reflection units and a laser radar change continuously, the adjustment mechanisms are used to adjust the included angles between the reflection units and a laser beam respectively, and the control unit is in communication connection with the laser radar. In the calibration method, the laser radar emits the laser beam according to a presentmeasurement angle direction, and the laser beam irradiates the reflection units; and the included angles between the reflection units and the laser beam are adjusted, an error of a measurement distance relative to the practical distance is obtained, and calibration data of the laser radar is determined according to the error, the intensity of a laser signal and the practical distance. According to the laser radar calibration device and method, a lot of measurement data with continuous change can be obtained needless of moving the reflection units, the real condition can be simulated, and thecalibration efficiency and precision are improved effectively.

The invention discloses a foot type parameter measuring device and a measuring method. The device comprises a packaging box, a computer, a sole scanning testing platform, a plurality of cameras and a point light source with a grating. The sole scanning testing platform, the cameras and the point light source are respectively embedded in the packaging box. By the aid of actual integrating equipment, a plane scanner, the point light source and the two cameras are organically combined, so that the foot type parameter measuring device is formed, and a complete foot feature position, data information and a three-dimensional reconfigured foot model are directly provided.

The invention relates to the technical field of aerostat modal tests, in particular to an aerostat modal testing method and an aerostat modal testing system. The aerostat modal testing method at least comprises the steps of: lifting and suspending an aerostat in an enclosed space; respectively selecting a nose cone position and a nacelle position of the aerostat as excitation points; dividing the aerostat into a plurality of cross sections; arranging a plurality of sensors on each cross section; exciting the excitation points at the nose cone position and the nacelle position respectively; and acquiring an excitation signal and a vibration signal generated during the excitation process. The aerostat modal testing system at least comprises an exciter, sensors, an acquisition instrument and a computer. The aerostat modal testing method and the aerostat modal testing system are used for determining the inherent frequency and vibration mode of the aerostat so that the aerostat can avoid resonance during the design process, and making clear of the responding situations of the aerostat to different dynamic loads.

A multidimensional radial pressure measuring device of a underground sucker rod comprises two parts: underground assemblies and ground accessories; when the measuring device is used in underground measurement, the underground assemblies and the ground accessories are separated and independently work; the underground assemblies are used for adaptively adjusting the data sampling frequency according to the change speed of radial pressure and amplitude index control, and the ground accessories are used for analyzing and processing the radial force data of the sucker rod at the previous time period; when the measuring device is arranged on the ground to perform data analysis, the underground assemblies and the ground accessories are connected through a data communication interface (605) by using a serial line; and the underground measurement data is transferred from a large-capacity flash memory (604). The multidimensional radial pressure measuring device is regular in structure, small in size and capable of measuring the multidimensional radial pressure of the underground sucker rod in real time and satisfying the measurement requirements in narrow spaces and complex working conditions.

The invention discloses a rotation-type coil group applicable to magnetic induction tomography and an arrangement method thereof. The arrangement method comprises the following steps: a group of coils are arranged in an annular form by surrounding a tested object, one coil is an exciting coil, the other coils are measuring coils, alternating current is switched in the exciting coil, the magnetic field change caused by eddy induction inside the tested object can be detected by the measuring coils, and sufficient measurement data is obtained by the rotation mode for meeting the requirement of the magnetic induction tomography. The rotation modes of the coil group comprise an object rotation mode, a coil rotation mode and a double rotation mode. According to the invention, the number of coils is reduced by 50%, the coupling relation between the coils is simplified, and the measurement precision and stability of a detecting system can be favorably improved; with the rotation modes, measurement data same as that of a conventional magnetic induction tomography coil system can be obtained, and more measurement data can be obtained by controlling the rotation angle; and in addition, being matched with the improved tomography algorithm, the rotation-type coil group disclosed by the invention can achieve better imaging quality.

The invention relates to a soil vibration measuring method. The soil vibration measuring method comprises the steps of embedding a gravity sensor into the soil and sending data measured by the gravity sensor to an external information processing device by a signal sending device. The invention further relates to a soil detection device comprising a cylindrical body, wherein the cylindrical body is embedded into the soil; the gravity sensor and the signal sending device are arranged on the cylindrical body; the gravity sensor is electrically connected with the signal sending device; the gravity sensor is used for detecting the occurring vibration or movement and simultaneously converting the detected signal into data of the occurring vibration or movement; and the signal sending device is used for sending the data to the external information processing device. According to the soil vibration measuring method and the soil detection device, with the adoption of the gravity sensor, the measurement on the soil vibration is realized, and the early warning information and the data analysis can be provided effectively in advance; and meanwhile, as the gravity sensor is arranged on the soil detection device, not only is the early warning information provided, but also the function of the soil detection device can be further improved.

The invention discloses a polar region sea ice environmental data monitoring buoy and a polar region sea ice environmental data monitoring method. Atmospheric parameters of positions at different heights within 4 meters above an ice surface can be measured and include the air speeds, the air directions, the air temperatures, the air pressure and humidity of the positions at different heights; thecontent of seawater dissolved oxygen and chlorophyll of positions at different depths under the ice surface can be acquired as well; the on-ice snowfall and the ice and water interface distance are measured through overwater sonar and underwater sonar, and the change of the total thickness of an ice layer can be obtained; data are transmitted through an iridium satellite module, automatic remote real-time monitoring is achieved, and analysis reference is provided for the thermodynamic change process in the sea ice growth process; compared with other buoy devices, the buoy has the beneficial effects of being novel in structure and diverse in measured data; and the buoy and method can be used for automatic unmanned monitoring of south and north pole polar region sea ice.

The invention discloses a crane load identification, measurement and adjustment control method. The control method comprises the steps that load data of the crane are acquired, a load mass of the crane is calculated, if the load mass exceeds a preset load limit, a steel wire rope multiple is obtained, and a first load parameter and a second load parameter of the crane are calculated; a pressure value and a flow value of an outlet of the crane oil pump are acquired, and a load torque requirement is calculated; and torque control operation is executed according to the load mass, the steel wire rope multiple and the load torque requirement, and safety protection operation is executed according to the acquired magnitude of a strain signal epsilon value. According to the control method, the dynamic and static combined measurement is realized, so that the measurement data are more comprehensive, the precision is higher, corresponding safety protection measures can be made for different situations, major accidents are avoided, the control is simple, and the application range is wide.

The invention belongs to the technical field of measurement and testing, and relates to a sucker rod mechanical parameter measurement device. The sucker rod mechanical parameter measurement device is composed of a long connector cabin, a short connector, a dual-ring sealing piece, a stress concentration filtering piece and a micro electric measurement and control system, wherein the dual-ring sealing piece is arranged in a long connector cabin sealing groove in a sleeved mode, the micro electric measurement and control system is placed in the cavity of the long connector cabin sealing groove, strain gauges are attached around a wire hole in the outer wall of the long connector cabin in the peripheral direction in a surrounding mode, and accordingly a bridge circuit measuring axial force and bending moment is formed. The stress concentration filtering piece is connected with the long connector cabin in a sleeved mode, high temperature-resistant strain gauges are attached to the inner wall of the drum-shaped portion of the stress concentration filtering piece, and accordingly a radial-force bridge measurement circuit is formed. The sucker rod mechanical parameter measurement device is simple in structure and good in main technical index; the maximum withstand voltage is 40MPa, the radial pressure measuring range is between 4N and 100KN, the axial force ranges from 35N to 1200KN, and the torque ranges from 50N*M to 400N*M; the sucker rod mechanical parameter measurement device can stably work under the condition with the temperature lower than 130 DEG C, the vibration frequency smaller than 1000HZ and large amplitudes.

The invention discloses a displacement measuring method for the inner part of enclosing rock for tunnel inner face, comprising the following steps: 1) making external preparations for front hole measurement including the preparing of tilting measurement pipes, the fastening of measurement rings to the tilting measurement pipes, the detachably fastening of sliding type micrometer probes or sliding type settling instrument probes inside the tilting measurement pipes, the fixed connecting among the tilting measurement pipes, the installing of the bottom covers of the tilting measurement pipes and the preparing of grouting pipes; 2) drilling measurement holes through the use of a RPD-75SL-H2 multi-function drilling machine; 3) installing the tilting measurement pipes into the drilled holes wherein the diameters of the tilting measurement pipes are smaller than the diameters of the drilled holes; 4) injecting cement mortar into the silts among the tilting measurement pipes and the measurement holes so that the measurement rings are integrated with the ground layer as one; and 5) applying the sliding type micrometers to conduct the measurement on the internal longitudinal displacement at the inner part of the tunnel face; and applying the sliding type settling instrument to measure the settlement at the inner part of the tunnel face.

The invention discloses a rock mass quality classification and dynamic parameter estimation method based on a blasting vibration test. The rock mass quality classification and dynamic parameter estimation method comprises the following steps: distributing test points according to an ordinary blasting vibration test, acquiring the time of a wave P and a wave S for arriving each test point by virtue of a multi-channel data acquisition unit, and also calculating the propagation velocity of the wave P and the wave S between two test points by virtue of a time difference of the wave P and the wave S for arriving the test points and a distance between the test points to ensure that the rock mass quality between the two test points can be judged and a dynamic elastic modulus of a rock mass between the two test points can be calculated according to the propagation velocity. The rock mass quality classification and dynamic parameter estimation method disclosed by the invention is simple to operate, and can be taken as an effective supplement of conventional geological exploration so as to ensure that a lot of time and workload can be saved; and the rock mass quality classification and dynamic parameter estimation method is suitable for the geological exploration of underground cavities in a blasting excavation process, and is also suitable for the geological exploration of side slopes.

The invention provides a determining method for grooved filter stick feature parameters. A determining device used by the method comprises a workbench, an annular light source, a digital camera, a sample plate, and a computer with a built-in grooved filter stick feature parameter determining program. The determining program has the following functions: scaling sample images, recording groove number, displaying concentric circles, identifying groove depth data, calculating average groove depth, displaying normal, identifying groove width, calculating average groove width, calculating groove area and groove area ratio, and calculating standard deviation and variable coefficient of part of parameters. The determining method includes: computer calculating, computer synthesis, and displaying and outputting data through the computer. By increasing resolution of the digital camera and upgrading the computer program, automation level and determining precision are increased, groove width determining and groove area determining are added, comprehensive determining data is achieved, and convincing determining of grooved filter stick features is achieved.

The invention discloses an open channel section water flow online measuring device and a measurement and control method. The device comprises a measuring supporting frame, a measuring rod assembly is fixedly installed on the measuring supporting frame, a side rod assembly communicates with a signal processing control host 11, the measuring rod assembly comprises a measuring rod 8 and a measuring rod driving mechanism, and a set of sensors are arranged on the side rod 8. The measuring rod driving mechanism comprises a measuring rod lifting motor 10, an output shaft of the measuring rod lifting motor 10 is fixedly connected with a coded disc 4 and a shaft angle encoder 5, and the coded disc 4 is fixedly connected with the measuring rod 8. The technical problem to be solved by the invention is to provide the open channel section water flow online measurement device and the measurement and control method so as to solve the problems that the existing open channel flow measurement equipment realizes multi-vertical-line multi-measurement-point water flow real-time online measurement according to relevant national standards, and the measurement is inaccurate under the conditions of turbid water body, silted channel, sundries in the water body and the like. The problem of real-time online flow measurement of the open channel can be effectively solved.

The invention provides an apparatus for detecting the concentration of powder in the spiral conveying tube of a bilayer electrode array. The apparatus comprises a bilayer electrode array sensor, a data acquisition and control system and an image reconstruction computer, the bilayer electrode array sensor is arranged in a position close to a material outlet outside the spiral conveying tube, and is formed by a special circular tube with a low dielectric constant, the outer wall of the special circular tube is pasted with an electrode array, an electrode array is embedded to the inner wall of the special circular tube, and the two ends of the inner electrode array and the outer electrode array are respectively provided with two annular shielding electrodes. The arrangement mode of bilayer electrodes makes adjacent electrodes be isolated through the special circular tube to replace a spacing between original adjacent electrodes, so isolation is reliable, and arrangement is compact, thereby more or larger electrodes can be arranged by fully utilizing the perimeter of the spiral conveying tube in order to obtain more measurement data for carrying out capacitance chromatography imaging, or the detected capacitance is sensitive and reliable, and the quality and the resolution of a reconstructed image are improved. The circular tube directly sleeves outside the measured pipeline in the measurement process, so the detection is convenient.

The invention relates to a full-automatic intelligent turning system and a full-automatic intelligent turning method. The turning system comprises a sensor calibration system, a turning power system, a parallel sampling system, a phase identification system, a real-time display system, a data filtering system and a data processing system, wherein the sensor calibration system is connected with the turning power system; the turning power system is connected with the parallel sampling system; the parallel sampling system is connected with the phase identification system and the real-time display system respectively; the phase identification system is connected to the data processing system; and the data filtering system is arranged between the data processing system and the real-time display system. According to the turning method, a sensor is used for identifying the phase of a light band and measuring displacement, and an automatic turning mode of any turning angle and any point number is adopted, so that rich measured data is obtained, and a turning process is continuous. The system and the method are irrelevant to relationships among the turning point number, the phase and turning rotating speed, and are wide in application range and high in measurement accuracy and turning efficiency; the requirements of high-accuracy continuous turning of any point number can be met; and the measurement accuracy is remarkably improved.

The invention discloses a system for detecting the reliability of a converter valve cooling control device. The system comprises a detected device state signal monitoring device, a detected device control response monitoring device, a detected instrument sensor fault monitoring device, a detected key control element failure monitoring device, a central control and processing device, an industrial Ethernet communication device and a reliability detecting and analyzing background. Meanwhile, the invention further discloses a method for detecting the reliability through the system. The method includes the steps of collecting detection information, setting up a mathematic model, automatically calculating the concordance rate Cj, the speed rate Rk, the stability rate Sm and the availability rate Qn of detected redundant signals, and calculating the reliability Pi of the converter valve cooling control device according to the weight. The system has the advantages of being small in size and high in set-up speed, universality, reliability and the like, and safe and stable running of the converter valve cooling control device is ensured.

The invention relates to a measurement system and method for surface potential distribution of an insulating material in various environments and belongs to the field of testing of performance of theinsulating material. The invention provides a measurement system and method for surface potential distribution of an insulating material in various environments that can adapt to multiple atmospheresand can adjust environmental parameters. According to the system and the method in the invention, a corona charging system and a data acquisition system are connected with a sealing test cavity, the sealing test cavity is connected with the input end of a comprehensive detection unit through a wire hole, the output end of the comprehensive detection unit is connected with an upper computer, the upper computer is connected with the input end of the comprehensive control unit, and the output end of the comprehensive control unit is connected with the sealing test cavity through the wire hole. The system and the method are mainly used for measuring the surface potential distribution of the insulating material in various environments.

The invention discloses a narrow-band Internet of Things based multifunctional health measurement system and method and aims to better meet multifunctional measurement requirements of users and achieve convenience in measurement. The system comprises an intelligent mobile terminal, a cloud server and an offline measurement module. The offline measurement module comprises a narrow-band Internet of Things NB-IoT information transceiving unit, a CPU (central processing unit) and a measurement service module. The measurement service module comprises at least one of a body temperature measurement unit, an electrocardiography measurement unit, a heart rate and blood oxygen measurement unit, a height measurement unit, a weight measurement unit, a body composition measurement unit, a display unit and an audio play unit. The intelligent mobile terminal is used for communication with the cloud server. The cloud server is used for communication with the intelligent mobile terminal and the NB-IoT information transceiving unit and sends control instructions to each unit of the measurement service module through the NB-IoT information transceiving unit.

The invention relates to an experimental device for testing the point load strength of rock, in particular to a full-automatic rock point load test instrument. The full-automatic rock point load test instrument comprises a hydraulic jack, a movable hydraulic loading cone, a fixed loading cone, an electric hydraulic device and a measurement system, wherein a hydraulic cylinder of the hydraulic jack is communicated with the electric hydraulic device through a pressurization hydraulic pipe and a pressure-discharge hydraulic pipe; the movable hydraulic loading cone is fixed above a piston of the hydraulic jack; the fixed loading cone is fixed on a cross beam of a load bracket; the measurement system comprises an automatic measurement device, a liquid flow sensor and a hydraulic sensor; the liquid flow sensor and the hydraulic sensor are mounted in the pressurization hydraulic pipe in sequence. The full-automatic rock point load test instrument is improved in efficiency and safety, and realizes full-automatic load parameter measurement.

The invention provides a rod displacement sensor angular measurement clamp. A supporting plate is fixed to a frame body through screws, the frame body is composed of a support and a base plate, a round hole is formed in the middle of the supporting plate, three groove holes are evenly distributed in the periphery of the round hole, the positions of the groove holes are coordinated and consistent with three threaded holes in a rod displacement sensor, an index dial is fixedly connected with the upper portion of the supporting plate through bolts, a three-jaw gasket is arranged between the index dial and the supporting plate, three bolts of the three-jaw gasket fall into the three groove holes in the supporting plate respectively and are matched and connected with three long nuts, the rod displacement sensor is fixed to the supporting plate through the bolts and the long nuts, a circular boss on the upper end portion of the rod displacement sensor penetrates out of the middle round hole of the supporting plate and then is fixedly connected with a vernier through bolts, the vernier is used in cooperation with the index dial, and the position of the vernier and the position of the index dial are relatively fixed through a fastener. The rod displacement sensor angular measurement clamp solves the problem that the rotating angle of a rod displacement sensor pointer cannot be measured comprehensively and precisely.

The invention discloses an intelligent water measurement system used in canals and river channels. The system is flexible and convenient to operate, high in adaptability, accurate in measurement, capable of achieving daytime measurement, practical, reliable and convenient to install. Power is supplied according to the scheme that a 12 V large-capacity polymer lithium-ion battery and a solar panelare combined to charge, data can be displayed on site and can be copied by using a U disk on site, and a data management mode that remote transmission is conducted through a GPRS module can be adopted. In use, the system can remotely set parameters through a GPRS according different ditches, the number of sensors is flexibly set, the system is suitable for on-site or remote real-time measurement of water level, flow and water quantity of various farm irrigation canals or river channels, and the accurate real-time data is provided for agricultural irrigation water.

The invention provides an ammonia concentration distribution test device. The ammonia concentration distribution test device comprises an image shooting device, a controller, a laser device, a first glass block, a circular pipe, a second glass block and a gas guide pipe, wherein the first glass block is installed at one end of the circular pipe, and is provided with a through hole communicated with one end of the circular pipe; the second glass block is installed at the other end of the circular pipe; the gas guide pipe is connected with the exhaust port of the circular pipe; the laser deviceand the first glass block are located in the same plane, and the laser emitted by the laser device enters into the circular pipe through the first glass block; the image shooting device, the first glass block and the second glass block are located on the same axis and mutually parallel, and the image shooting device acquires the fluorescent images generated by ammonia due to the effect of laser; and the laser device and the controller are connected with the controller separately. The system device is capable of realizing visual and quantitative test for ammonia concentration distribution on the whole section of the front end of a catalyst in an SCR system simultaneously, has the advantages of being high in measurement accuracy and comprehensive in test range, and plays the role of guidanceon the optimal design for the SCR system and an exhaust pipeline.

A rotating distance measurement verification method includes: initializing; dividing high-precision distance sensing units T1, T3 and T5 as a first group and T2, T4 and T6 as a second group to obtain distances D1, D2 and D3 from a center position to a target as a first group of measured data; dividing high-precision distance sensing units T1, T2 and T3 as a third group and T4, T5 and T6 as a fourth group to obtain distances D4 and D5 from the center position to the target as a second group of measured data; after moving, acquiring distances D7, D8, D9, D10 and D11 from the center position to the target by similar means, and acquiring a calculated distance D6 according to a distance formula. By adoption of the rotating distance measurement verification method, pre-verification correction of a distance measurement verification device can be realized, and verification data can be provided for research and analysis, so that distance measurement precision can be effectively improved, and cost reduction and efficiency improvement are realized.

The invention discloses a rotary type distance measurement verification device and a method. The device includes high precision distance sensing units T1-T6 which are successively arranged on the sixvertexes of a regular hexagon framework with the side length of a. A distance measurement device is arranged in the central position of the regular hexagon framework; a target is arranged on an extension line, the extension line passing through the center of the regular hexagon and being perpendicular to the plane of the regular hexagon framework; the six sides of the regular hexagon framework areseparately provided with guide rails H1-H6; and a driving unit is used for driving the high precision distance sensing units T1-T6 to move along the guide rails H1-H6 arranged on the six sides of theregular hexagon framework in a clockwise direction. According to the technical scheme, the pre-verification and correction of the distance measurement verification device can be realized, and verification data for researches and analyses can be provided, and therefore, the precision of distance measurement can be effectively improved, the cost is reduced, and the efficiency is enhanced.

The invention discloses a two-stage air-suspending centrifugal air compressor comprehensive performance test-bed which comprises a primary air inlet end pipeline, a secondary discharge end pipeline, acooling air discharge pipeline and a cooling water circulation pipeline. The two-stage air-suspending centrifugal air compressor comprehensive performance test-bed provided by the invention has the beneficial effects that the performance test-bed is scientific and reasonable in structure design, and high in automation degree; and through a series of sensors arranged on the device, multiple data can be measured, and the measured data is comprehensive, so that the demand on the dependence test of performances of an air compressor can be met, the two-stage air-suspending centrifugal air compressor comprehensive performance test-bed is applicable to air supply performance tests, water cooling performance tests and air cooling performance tests of air compressors and air supply systems in multiple models and under multiple working conditions, the working efficiency and the accuracy are greatly improved, an ergonomic design is favorable, and the test and working environment is greatly improved.

The invention belongs to the field of laser range finding, and discloses a device for suppressing a speckle effect by using partial-wave surface shifting in triangular ranging point linear imaging. The device comprises a transmitting unit and a receiving unit, wherein the transmitting unit comprises a laser, a focusing lens group and a cylindrical lens. A measured object is disposed below the cylindrical lens. A one-dimensional glass sheet array and a receiving lens group in the receiving unit are disposed between a photoelectric image detector and the measured object, and the scattered lightemitted by the measured object is shifted by a partial-wave surface of the one-dimensional glass sheet array to form a plurality of linear focal spot images which are received by the photoelectric image detector. The one-dimensional glass sheet array is disposed between the photoelectric image detector and the measured object, so the device can perform the shifting of the scattered light emitted by the measured object to form the plurality of linear focal spot images, and the device performs the range finding through solving a mean value, effectively reduces the measurement uncertainty in laser range finding via an averaging method, does not sacrifice the lateral resolution of a measurement device, and is better in application prospect.