130 results about "Field calibration" patented technology

The invention discloses a portable light intensity verification device, and belongs to the technical field of environment and meteorological monitoring. The portable light intensity verification device comprises a voltage-stabilized power supply, a light source and a shading sealing cover, and the voltage-stabilized power supply is connected with the light source through an electric wire, supplies power to the light source and controls the light intensity of the light source; the light source is a group of LED lamp beads, the shading sealing cover is made of a hot good conductor, a plurality of open holes are formed in the shading sealing cover, and the LED lamp beads are fixedly arranged on the inner wall of the shading sealing cover through the open holes. A heat dissipation assembly can be further arranged to promote heat dissipation of the shading sealing cover. In the process of measuring the photolysis rate of the gas in the atmosphere by a spectroscopic method, the optical receiving head is covered by the shading sealing cover provided with the LED lamp beads, and the spectrograph is subjected to simple, rapid and reliable field calibration or verification, so that the verification work can be carried out without a standard optical platform, and the characteristics of accuracy, convenience and the like are achieved.

The invention discloses a portable microphone on-site calibration device and method, and solves the problems of high shutdown cost, long period, high risk, large environmental difference and the like caused by the fact that a microphone needs to be sent to an inspection laboratory for calibration in the prior art. The device comprises a sound calibrator module and an integrated control circuit module, the sound calibrator module is composed of a sound production unit, a reference microphone unit and a coupling cavity structure, and a microphone to be tested and a reference microphone form a closed air cavity through a coupling cavity to receive the same sound pressure signal; the control circuit module drives the signal generator to generate a calibration sound signal through the MCU controller, synchronously collects output voltage signals of the reference microphone and the microphone to be tested, and calculates the sensitivity of the microphone to be tested by combining environmental parameter correction of the temperature and air pressure sensor. According to the invention, plug and calibration are realized, operation is convenient, battery power supply is supported, and the device is suitable for field calibration in a complex environment, and has traceability, stability and environmental adaptability.

The invention provides an atmospheric particulate water-soluble ion analysis instrument calibration system and calibration method, and belongs to the technical field of atmospheric particulate measurement. The system comprises an atmospheric environment simulation measurement device and a portable calibration device. The atmospheric environment simulation measurement device simulates actual environmental conditions through an aerosol mixing cabin in a thermotank, and is equipped with various sensors to monitor temperature, air pressure and humidity. The portable calibration device is internally provided with an aerosol generator, a constant-speed diverter, a particle sensor and the like, and an aerosol sample can be generated on site for calibration. The calibration method comprises two parts of constructing a standard parameter database and performing field calibration, and the calibration precision is ensured by comparing a measured value of the particulate matter sensor with a particle size spectrum. According to the calibration system and the calibration method for the atmospheric particulate water-soluble ion analysis instrument, the problems that traditional calibration equipment is large in size and cannot be calibrated on site are solved, and reliable technical support is provided for on-site calibration of the atmospheric particulate water-soluble ion analysis instrument.

The invention discloses a field calibration method and system for an active defense device of a converter transformer. The field calibration method comprises the following steps: determining a calibration loop wiring mode, a test process and a calibration item qualification criterion for performing different types of performance calibration on the active defense device of the converter transformer; for any type of performance verification, determining a verification loop based on the verification loop wiring mode, and testing based on the test process to obtain test data; and for any type of performance verification, determining a verification result based on the test data and the corresponding verification item qualification criterion. Synchronous verification of the built-in ultrahigh-frequency channel, the built-in acoustic channel and the high-frequency channel is achieved, the response characteristics of the sensor under the composite working condition can be comprehensively reflected, the method is closer to the actual operation environment, and the accuracy and reliability of evaluation are remarkably improved; the test process is standardized, and the evaluation result repeatability is high; the test cost and complexity are reduced, and the test efficiency is improved.

The invention provides a testing device and a testing method for postprocessor temperature field calibration, and belongs to the technical field of internal combustion engine postprocessing, and the method comprises the following steps: installing the testing device, fixing a plurality of thermocouple probes on a base, and enabling the end surfaces of the thermocouple probes to extend to a specified measurement area of a diesel particle filter; triggering and starting a regeneration process of the diesel particulate filter under a target working condition, and synchronously collecting temperature data from the thermocouple probe in real time; calculating the maximum temperature gradient in the diesel particulate filter based on the temperature data; and comparing the maximum temperature gradient with a preset safety threshold, and adjusting a regeneration control strategy according to a comparison result. According to the invention, the test efficiency, the data accuracy and the economical efficiency are obviously improved.

The invention discloses an alternating current system residual current monitoring device operation verification device and method, and belongs to the technical field of residual current monitoring device verification, the verification device comprises a verification control unit, at least one verification unit and at least one verification CT; the verification control unit sends a control instruction to each verification unit according to the expected current of the to-be-verified residual current monitoring device so as to control the verification unit to output the current, and the current output port of each verification unit is short-circuited through the corresponding configured current output wire so that the current output by the verification unit flows through the current output wire. Meanwhile, a current output wire is wound around a current monitoring CT corresponding to the verification unit, so that the current monitoring CT can measure the real-time disturbance current and the output current of the circuit at the same time; and each verification unit measures the real-time disturbance current of the circuit through the correspondingly configured verification CT. The device can be used for operation field calibration, test acceptance and the like of the residual current monitoring device.

The application discloses a steel mill converter management and statistics system and method. The system comprises a production process monitoring module, a converter operation performance module, a production history tracing module, a converter stock material module and a data processing updating module. The production process monitoring module is used for monitoring and filling important data in the converter production process. The converter operation performance module is used for collecting various signal data and manually filling data in the converter production process. The production history tracing module is used for automatically and regularly counting the converter operation performance according to a set statistical method. The converter stock material module is used for setting the identification logic of part signals. The data processing updating module is used for regularly updating the data by combining the signal identification algorithm and the manual field calibration, supporting the query and screening based on the user selection, and providing the data export and backup functions. The application automatically collects, manually fills and automatically counts the related data in the converter production process of the steel mill, greatly saves the time and labor cost of data management, and improves the data management efficiency.

The application provides an array programmable temperature field calibration device and method, belonging to the technical field of temperature measurement and calibration. The device comprises a system control unit, a plurality of temperature control units, a bidirectional temperature control module and a composite heat insulation structure. The system control unit is used to generate control instructions corresponding to a target two-dimensional temperature distribution pattern, and a graphical interface is provided for users to set the pattern. The plurality of temperature control units are arranged in an array to form a radiation surface, and each temperature control unit receives independent control instructions. The bidirectional temperature control module is integrated in each temperature control unit, and is used to independently adjust the temperature of the radiation surface of the unit according to the received control instructions. The composite heat insulation structure is arranged between adjacent temperature control units, and is used to suppress the thermal cross talk between the units. The application can flexibly and efficiently generate a high-precision programmable two-dimensional temperature field, which is used for comprehensive calibration of non-contact temperature sensors.

The invention relates to the technical field of electromagnetic environment effect testing, and discloses a phased array multifunctional electromagnetic environment effect testing system and a calibration method thereof.The system comprises an active array plane, a comprehensive processing extension set, a comprehensive frequency source extension set, an external feed source combination, a superheterodyne receiver and a digital acquisition extension set; wherein the active array plane is provided with a plurality of minimum sub-arrays, each minimum sub-array is composed of at least one active channel and a corresponding radiation antenna unit, and each minimum sub-array is used for receiving one excitation signal to complete power amplification and radiation synthesis; and the path number of the independent excitation signals generated by the comprehensive frequency source extension set corresponds to the number of the minimum subarrays. The calibration method comprises darkroom plane near-field calibration, external feed source combination calibration and active array plane calibration before working. The system and the method provided by the invention have the advantages of relatively strong accurate construction capability of a complex electromagnetic environment, extremely high test flexibility, multi-beam coordination and high-precision full-link calibration, and stable and reliable operation.

The present application relates to electromagnetic environment effect test technical field, disclose a kind of phased array multifunctional electromagnetic environment effect test system and its calibration method, system includes active array surface and comprehensive processing extension, comprehensive frequency source extension, external feed source combination, superheterodyne receiver and digital acquisition extension;Wherein: active array surface has dry minimum subarray, each minimum subarray is formed by at least one active channel and corresponding radiating antenna unit, each minimum subarray is used to receive one way excitation signal to complete power amplification and radiate synthesis;And the number of independent excitation signal generated by comprehensive frequency source extension corresponds with the number of minimum subarray.The calibration method includes darkroom planar near-field calibration, external feed source combination calibration and active array surface calibration before work.The system and method of the present application have strong accurate construction ability of complex electromagnetic environment, extremely high test flexibility, multi-beam coordination and high-precision full-link calibration, stable and reliable operation.

The invention provides an image bright field correction method and device for a laser plasma accelerator, electronic equipment and a storage medium, and relates to the technical field of X-ray imaging. The method comprises the following steps: acquiring dark fields and initial X-ray beam spot images of an X-ray bright field calibration detector and an X-ray imaging detector to obtain coordinates of an initial X-ray beam spot center; under the condition that the imaging sample is moved in, a real-time unprocessed X-ray beam spot image obtained by the X-ray bright field calibration detector and a real-time unprocessed projection image obtained by the X-ray imaging detector are obtained, so that a real-time beam spot image and a real-time imaging image are obtained, and coordinates of a real-time X-ray beam spot center are obtained; according to the coordinate difference between the real-time X-ray beam spot center and the initial X-ray beam spot center, the X-ray beam spot center is obtained, and a final real-time projection image is obtained. According to the invention, the accuracy of bright field correction is improved by measuring the X-ray beam spot in real time and combining geometric space mapping and coordinate transformation.

The invention discloses an on-site zero setting method and device for a force sensor, and belongs to the technical field of industrial control. The invention provides a force sensor field zeroing method, aiming at solving the technical problems that the operation is time-consuming, the process is complicated and the zeroing precision is low because the existing force sensor field zeroing depends on a hardware manual knob resistor. Firstly, an ADC module collects an initial output voltage value of a force sensor Wheatstone bridge and transmits the initial output voltage value to a control module; the control module calculates a difference value delta V with a target zero value and judges a preset interval to which the delta V belongs; the corresponding DAC adjustment step length is matched according to the interval; controlling the DAC module to output an adjusting voltage to a bridge compensation end; the steps of sampling, judging and adjusting are executed circularly until delta V is smaller than or equal to 0.0001 V, and zero setting is completed; and finally, the final adjustment voltage of the DAC is stored in the storage module. Software control replaces traditional hardware manual operation, equipment disassembly and assembly are not needed, zero setting time consumption is shortened, operation complexity is reduced, zero setting precision is improved through adaptive step length and closed-loop control, and the method is suitable for field calibration of force sensors in scenes of electronic weighing instruments, industrial control, material testing machines and the like.

The application provides a field calibration system for calibrating a laser tracker, and belongs to the technical field of laser measurement. The field calibration system comprises a truss reference device, a plurality of target ball seats and a plurality of connecting rods. Two adjacent target ball seats are fixedly connected by a connecting rod, so that the plurality of target ball seats form a truss structure through the plurality of connecting rods. A target ball is configured to be selectively fixed to any one of the plurality of target ball seats. The laser tracker is configured to measure a plurality of spatial position data of the target ball in a base coordinate system when the target ball is fixed to the plurality of target ball seats. The base coordinate system is established with the base of the laser tracker as the origin. A parameter calibration device is in communication connection with the laser tracker and is configured to determine a measurement distance value between two adjacent target ball seats based on the plurality of spatial position data, and calibrate the laser tracker based on the standard length of the plurality of connecting rods and the plurality of measurement distance values.

The invention discloses a calibration-free soil dry density in-situ measurement method, and belongs to the technical field of soil physical property detection in geotechnical engineering and agricultural engineering. The method comprises the following steps: firstly, acquiring a volume dielectric constant epsilon and an environment temperature of soil in situ, and acquiring a mass water content omega of the soil in situ; secondly, determining physical parameters of the soil, wherein the physical parameters comprise a soil particle dielectric constant, a soil particle relative density and a water dielectric constant determined according to the temperature T; and finally, substituting the volume dielectric constant, the mass water content omega and the physical parameters of the soil into a calculation model constructed on the basis of a soil solid-liquid-gas three-phase mixed medium theory, and solving to obtain the dry density of the soil. According to the method, a calculation model is constructed based on physical characteristics of a soil solid-liquid-gas three-phase mixed medium, parameters which can be directly measured are obtained in situ, and the dry density is directly solved after the parameters are substituted into the model, so that tedious steps of field calibration in a traditional method are avoided, and in-situ, rapid and calibration-free measurement of the dry density of the soil is realized.

The invention discloses a field calibration device for an airborne navigation system, and belongs to the field of navigation system calibration. The device comprises a positioning and orienting system, a movable three-axis turntable and a portable industrial control all-in-one machine, the positioning and orientation system comprises a gyro north seeker, a laser tracker, a satellite receiver, an RTK data radio assembly, an antenna, a control acquisition box, a battery box, a tripod, a power cable, a gyro north seeker signal output cable, a laser tracker signal output cable, an antenna signal output cable and an acquisition signal output cable; the movable three-axis rotary table comprises an inner shaft table top, an inner code disc, a middle code disc, an outer code disc, an outer motor, an outer slip ring, an inner shaft worm and gear shaft system, a middle shaft worm and gear shaft system, a north guide mirror, a base, an electric control box, a main shaft driver, a power supply and a roller, the given angular position is realized by controlling the rotary table to rotate, and the given angular speed is realized by controlling the rotation angular rate; the attitude angle is given by controlling three axes of the rotary table and is used for attitude calibration of an airborne navigation system.

The invention discloses a seismic signal acquisition equipment frequency response parameter inversion method, device and system, and relates to the technical field of geophysical exploration. The method is executed by computer equipment in a frequency response parameter inversion system of the seismic signal acquisition equipment, and after seismic wave field response signals synchronously acquired by target node equipment and standard node equipment are received, preprocessing and transfer function estimation are sequentially carried out to obtain a relative transfer function of the equipment; secondly, optimizing model parameters of the frequency response mathematical model of the target node equipment by adopting a nonlinear optimization algorithm to obtain optimal model parameters for minimizing the target function, and finally, importing the optimal model parameters into the mathematical model to obtain an inversion calibration result of the frequency response parameters of the target node equipment. Therefore, the method is not only suitable for field calibration and periodic performance evaluation of equipment, but also suitable for centralized management of large-scale node equipment, and provides powerful technical support for seismic data quality control.

The utility model relates to the technical field of earthquake monitoring, and discloses an earthquake monitoring station field calibration device comprising a supporting seat; the rotating disc is rotationally connected to the supporting seat, and a pointer is arranged on the rotating disc; the supporting seat is located on the peripheral side of the rotating disc and provided with a dial, the dial is provided with scale marks, and the pointer points to the scale marks; the north seeker is mounted on the rotating disc, the north seeking direction of the north seeker is the same as the direction of the pointer, and the north seeker and the pointer rotate synchronously. According to the utility model, the north seeker is arranged on the rotating disk, the north seeker can determine the true north direction value of an attached carrier by measuring the rotation angular velocity of the earth, the process is not interfered and influenced by an external magnetic field or other environments, the north seeker and the pointer synchronously rotate, and when the orientation direction of the pointer is true north direction, the north seeker and the pointer are in real north direction. A seismometer may be mounted in this direction. Therefore, the installation precision of the seismometer is improved, manual operation errors are reduced, and the precision of earthquake monitoring and early warning is improved.

The invention relates to the technical field of intelligent medical building and traffic planning, in particular to a method for building a three-dimensional parking building in a hospital based on instant modeling and analogue simulation analysis, and solves the problem that a traditional planning method mainly depends on manual investigation and static capacity estimation. In order to solve the problems of backward data acquisition, single analysis dimension, decision dependence on subjective experience and insufficient prediction and evaluation ability in the prior art, the method comprises the following steps: S1, constructing a binocular depth camera operation environment, configuring ORB-SLAM, YOLOv8 and Byterack algorithms, and carrying out simulation test and field calibration; s2, field space properties are investigated on site, the EMR of a patient, namely electronic case data of the patient, is acquired and analyzed, main traffic flow lines of the patient are visualized, and high-frequency nodes and traffic paths are determined. According to the method, the defects of data lag, high subjectivity and the like of a traditional planning method are overcome, a whole-process quantitative decision from data acquisition, simulation modeling to scheme generation is realized, and the hospital traffic efficiency and the medical treatment quality are remarkably improved.

The invention provides a multi-channel ink spraying device and method.The device comprises an ink spraying system, an ink blocking system, an air source system and a control system, and the ink spraying system comprises an air brush, a plurality of material containers used for containing different materials and a first driving mechanism used for driving the material containers to move relative to the air brush; the ink blocking system comprises an ink blocking piece arranged on the ink outlet path of the material container and a second driving mechanism used for driving the ink blocking piece to move, and an opening for selectively opening or closing the ink outlet path of any material container is formed in the ink blocking piece; the air source system is used for providing atomized airflow for the air brush; and the control system is used for cooperatively controlling the first driving mechanism, the second driving mechanism and the air source system so as to suck the materials from the selected material containers according to a preset sequence and spray the materials. The problems that ink switching is inconvenient and spraying precision is insufficient in an agricultural field calibration method in the prior art can be solved, and automatic switching and accurate spraying of multi-channel ink are achieved.

The application discloses a portable switch cabinet dehumidification and temperature and humidity rapid field calibration device and method, which comprises a portable temperature and humidity environment cavity, a calibration installation unit, a standard reference unit, an air flow circulation unit and an intelligent control unit; the intelligent control unit is provided with a self-checking module, a data acquisition module, a calibration judgment module and a calibration locking module; the self-checking module determines an abnormal reference sensor through data comparison logic; the data acquisition module synchronously acquires data and constructs a sliding window data set; the calibration judgment module calculates space uniformity indexes and time stability indexes, compares the space uniformity indexes and the time stability indexes with space uniformity threshold values and time drift threshold values, and judges the environment stability; the calibration locking module calculates an environment reference true value, calculates errors of sensors to be calibrated, and generates a calibration report; the application reduces the volume and weight of the calibration equipment, reduces the deviation caused by local air flow disturbance in the calibration chamber, automatically judges the calibration environment, and improves the calibration quality.

The invention discloses a method for observing the thickness of a plunger-bushing lubricating oil film of a hydraulic rock drill. The observation method comprises the following steps: preparing equipment for observing the thickness of the plunger-bushing lubricating oil film; field-of-view calibration: placing a graduated scale on the focal plane to calibrate the size of the field-of-view of the camera; searching a movable contact area to ensure that the microscope can capture clear interference fringes; parameters of a high-speed camera and a laser source are set, and it is ensured that the contact area can be shot within the set exposure time; and starting a motor, continuously collecting photos under a set working condition, and screening out the photos of the contact area. According to the observation method, non-contact, dynamic and high-precision observation and prediction of the oil film thickness can be realized.

The application discloses a kind of methods and systems for non-destructive corrosion evaluation of typical grounding body, wherein the method comprises: carrying out field calibration scanning on reference grounding body with known health state, obtaining dielectric constant and health reference amplitude;Data acquisition is carried out on the grounding body to be measured using ground penetrating radar system, and original GPR data is obtained;Based on the dielectric constant, data processing and analysis are carried out on the original GPR data, and the spatial coordinates of the grounding body to be measured at each scanning position are located from the original GPR data;Based on the spatial coordinates of the grounding body to be measured, the real reflection amplitude of the grounding body to be measured is extracted;Based on the health reference amplitude and the real reflection amplitude, the corrosion state of the grounding body to be measured is determined.The significant effect is: effectively overcome the detection uncertainty problem caused by the complexity and non-uniformity of soil medium;Realize the quantitative evaluation and accurate positioning of the corrosion state of the grounding body.

The utility model provides an engineering measurement field calibration and check device, which relates to the technical field of engineering field calibration and check and comprises a calibrator and a base. The edge of the upper surface of the rotating seat is fixedly provided with a plurality of threaded plates which are distributed in an annular array about the center axis of the base, the calibrator is arranged on the upper surface of the rotating seat, the threaded plates are distributed on the periphery of the calibrator, and a gear ring drives the rotating seat to rotate by shifting a gear; the rotating seat can drive the calibrator to rotate and adjust at any angle, the friction plate can descend to be in contact with the upper surface of the rubber ring by rotating the screw rod after the angle of the rotating seat is adjusted, the angle of the rotating seat is fixed by utilizing the friction force between the friction plate and the rubber ring, and the angle of the calibrator is fixed.

This invention discloses a portable on-site calibration device and method for wind sensors. The calibration device includes an execution unit, which, from bottom to top, comprises a base, a stepper motor gear compartment, and a ring angle encoder. A fixing bracket is provided on the side of the gear compartment. A wind speed generating unit includes a horizontally continuous chamber with an air outlet at the rear end. Inside the chamber, a fan module and a honeycomb panel are arranged sequentially along the wind speed direction. The honeycomb panel has uniformly arranged, closely spaced horizontal through holes with an equivalent diameter of 4-8 mm. This invention's wind speed generating unit uses only a combination of a fan module and a honeycomb panel to output a low-speed, uniform wind field. It is compact, low-cost, and has a fully open structure. Combined with an angle scale, angle stop bar, and electromagnet, it can automatically complete the wind direction sensor calibration process.

The invention provides a non-contact river channel video flow measurement system and device based on a smart phone, belongs to the technical field of river channel flow velocity measurement in water resource monitoring, and aims to solve the problems that traditional contact flow measurement is high in cost and complex in operation, and mobile phone video flow measurement has perspective distortion and is difficult in floater identification. The system comprises a video acquisition module, a field calibration module, a video preprocessing module, a target identification and tracking module, a flow velocity calculation module, a front-end interaction module and a cloud service module. The device is composed of an intelligent mobile phone integrated with a front-end module and a cloud server for deploying a core algorithm. Non-contact flow measurement is completed through module cooperation, the cost is low, operation is convenient, precision is high, scene adaptability is high, and effective technical support is provided for water resource monitoring.

The present application relates to the technical field of non-contact three-dimensional measurement, and particularly relates to a line structured light plane field calibration method based on a two-dimensional target. The present application uses all feature points on the extracted line structured light strip center line and a plane normal vector fitted by a camera optical center to cross multiply with a normal vector of a camera plane where the two-dimensional calibration target is located to obtain a direction vector of an intersection line. Then, the feature points on the line structured light strip center line and the normal vector of the plane where the target is located are used to obtain a direction vector of an intersection line again by moving or rotating the calibration target at the same position once. After obtaining the direction vectors of the two intersection lines, the normal vector of the target line structured light plane is obtained by cross multiplication. Thus, the calibration is completed. The present application solves the problems of less calibration points, the need for multiple movements of the two-dimensional target and large calculation amount when using a traditional two-dimensional target to calibrate a light plane.

A wide-range current transformer field calibration system and a self-checking method thereof, the field calibration system comprising a self-checking circuit and a CPU, the self-checking circuit comprising n groups of tap switches of a primary winding and n groups of tap switches of a secondary winding; a voltage input of a voltage regulating power supply is zero, the CPU controls the n groups of tap switches of the primary winding and the n groups of tap switches of the secondary winding to be closed or opened, a transformation ratio of a standard voltage transformer is consistent with a calibration transformation ratio of a tested current transformer; the CPU controls the voltage regulating power supply to make a current output by a current riser rise to 10% of a rated current of the standard current transformer, and performs self-checking on the field calibration system, if a current percentage value output by an error calibration device rises with a voltage rise of the voltage regulating power supply, and a display value is 0.1%, 1%, 5% or 10%, the self-checking is qualified; otherwise, the self-checking is unqualified. The present application solves problems of many field calibration test devices, complex wiring and difficult guarantee of accuracy.

This invention provides a method for calibrating gust flow fields based on a dynamic pressure sensor probe. Using the dynamic pressure sensor probe, the pressure data under no-wind conditions is averaged and then subtracted from the incoming static pressure to obtain the zero-point pressure. Then, the wind speed control system is activated, and after the wind speed stabilizes, the collected pressure is subtracted from the zero-point pressure to obtain the gust field pressure value. The gust field pressure is then averaged to obtain the gust field atmospheric pressure value at each point. The gust direction angle is obtained by substituting the measured pressure data into the calibration fitting formula, based on the incoming wind speed. Finally, the gust amplitude is obtained by combining the wind direction angle and the incoming wind speed. This method uses simple probe equipment, has low requirements for the measurement environment, is not easily damaged, and can obtain the incoming velocity and gust amplitude in real time. It can also provide the direction angle of the velocity after disturbance by the gust generator.

The application discloses a kind of PCCP pipeline peripheral soil density detection device and detection method, belong to major water network engineering construction and safety field.A kind of PCCP pipeline peripheral soil density detection device and detection method, including the following steps, PCCP pipeline soil collection area demarcation, PCCP pipeline peripheral soil is overall sampling, field calibration processing of soil sample, elastic wave tomography processing of soil sample and using calibration curve formula calculation PCCP pipeline peripheral soil density value, PCCP pipeline soil collection area demarcation specific operation flow is as follows: measurement release line gives pipeline longitudinal axis position, mark at the position of distance axis one times pipeline diameter, as subsequent soil collection drilling point.In existing pipeline soil density detection, the soil sample in specific area of pipeline periphery cannot be collected in all directions under the premise of ensuring volume, and the original soil is directly measured for density in the later stage, with poor measurement accuracy.

The invention discloses a field calibration device and method for an underwater spectrum sensor, and the method comprises the steps: preparing standard solutions with various concentrations, including pure water solutions; measuring the standard incident light intensity and each standard emergent light intensity in each standard solution, and obtaining each standard absorbance according to the standard incident light intensity and each standard emergent light intensity; respectively placing the test containers containing the standard solutions in test grooves to measure standard test incident light intensity and each standard test emergent light intensity, and obtaining each standard test absorbance according to the standard test incident light intensity and each standard test emergent light intensity; obtaining a first function relationship according to each standard absorbance and each standard test absorbance; placing the test container containing the standard solution in a field test tank to measure the field test incident light intensity and each field test emergent light intensity, and obtaining each field test absorbance according to the field test incident light intensity and each field test emergent light intensity; obtaining corresponding standard absorbance according to the field test absorbance and the first function relation; and a calibration function is obtained according to the concentration of each standard solution on site and the corresponding standard absorbance, so that the efficiency and accuracy of on-site calibration of the sensor are improved.