266results about How to "Improve measurement accuracy" patented technology

The invention discloses a bolt pre-tightening force testing method based on an electromagnetic ultrasonic pre-tightening force measuring system, and the method comprises the steps: collecting the waveform data of transverse and longitudinal waves generated by an electromagnetic ultrasonic probe, and only processing the current frame echo data and historical accumulated data each time through a data averaging algorithm. The storage space only needs to store the historical accumulated data received by the electromagnetic ultrasonic probe once, so that the processing speed and the signal-to-noise ratio of the data are improved; and automatically identifying and calculating the wave peak sound time enveloped by the transverse and longitudinal wave echoes of the bolt through a peak value algorithm, fitting to obtain a calibration curve corresponding to the bolt of the model specification through the ratio of the transverse and longitudinal wave sound time to the bolt pre-tightening force corresponding to the time period, and measuring the pre-tightening force of other bolts of the same model specification by using the calibration curve. The method is easy and convenient to operate, effective transverse waves and longitudinal waves can be excited at the same time, and measurement precision and accuracy are high.

The utility model discloses an automobile electronic product waterproof performance detection device, which belongs to the technical field of waterproof performance detection devices, and comprises a detection device main body and a pressurization device, the top of the detection device main body is connected with two support plates, and the tops of the two support plates are provided with the same cooling mechanism; by arranging the sealing mechanism, the stroke groove, the base plate and the sealing ring, the sealing ring has a certain buffering distance when being extruded, irreversible deformation caused by excessive extrusion of the sealing ring is avoided, the service life of the sealing ring is prolonged, the sealing ring can be tightly attached to the sealing groove by arranging the first spring, and the sealing effect is improved. The air tightness of the mold and the measurement accuracy of the device are improved, the air bag is extruded through the connecting plate, the air bag blows out air, and therefore the temperature in the first mold can be rapidly reduced, the speed of recovering the normal temperature of the first mold is increased, the waiting time is shortened, and then the measurement efficiency is improved.

The invention provides an automatic gain control method and circuit of an ultrasonic flow metering device, and aims to improve the accuracy and stability of flow metering. According to the method, the gain is automatically adjusted by measuring the pulse width of an echo signal and comparing the pulse width with an expected value. The circuit comprises a transmitting circuit, an ultrasonic transducer, a variable gain amplifier, a variable threshold comparator, a zero-crossing comparator, a flight time measuring unit, a pulse width measuring unit, a time-to-digital converter and a calculation and control unit. According to the scheme, independent gain configuration of uplink and downlink flight time and a fine gain adjustment strategy based on echo amplitude change can be realized. In addition, by setting the allowable maximum pulse width change value, whether the measurement error is within a reasonable range can be automatically judged, and re-measurement can be carried out when necessary. According to the integrated design scheme, the flexibility and the response speed of measurement are improved, the signal processing flow is optimized, and an innovative solution is provided for ultrasonic flow metering.

The invention belongs to the technical field of ultrasonic Doppler blood flow imaging, and particularly relates to a three-dimensional ultrasonic vector Doppler imaging method based on a row-column addressing array. According to the method, three-dimensional ultrasonic vector Doppler imaging is realized by combining a high-frame-rate two-dimensional non-focused wave emission sequence and a row-column addressing array (RCA) of a least square multi-angle Doppler velocity estimator; the method specifically comprises the following steps: acquiring radio frequency data from each oblique non-focused wave emission, and then performing IQ demodulation, beam forming and clutter filtering; performing high-frame-rate multi-angle vector Doppler analysis and speed estimation on a result through RCA; and dual-wavelength anti-aliasing processing is carried out. According to the invention, the imaging speed of more than thousands of frames can be realized, the sensitivity to low-speed flow and the measurement accuracy to high-speed flow are obviously improved, and clinical environment experimental verification is carried out; the method is suitable for clinical application, especially for blood flow dynamic monitoring of large blood vessels, and important support can be provided for blood flow dynamic research and clinical diagnosis.

The invention relates to the technical field of ultrasonic thickness measurement, in particular to a sewage pipeline scale deposition thickness measurement method and system. The method comprises the following steps: firstly, obtaining all similar ultrasonic wave band groups among all ultrasonic wave signals at the same measuring point, and further screening out all stable wave band groups; symmetrically fusing the two ultrasonic signals of each group of preset measuring points to obtain confidence weights of fused ultrasonic signals of each group of preset measuring points under each frequency; and finally, evaluating the scale deposition thickness of the sewage pipeline based on all the fused ultrasonic signals and the corresponding confidence weights. According to the method, the stable ultrasonic wave section is determined through the similar fluctuation characteristics of the ultrasonic wave signals at the same angle and different frequencies, then the ultrasonic wave signals at the measuring points at the symmetrical angle are fused, the confidence coefficient is evaluated, and therefore the pipeline accumulated dirt thickness is accurately evaluated based on the confidence coefficient and the fused ultrasonic wave signals; the interference of other external factors on the ultrasonic signals is reduced, and the measurement accuracy of the pipeline scale deposition thickness is improved.

The invention provides a virtual power plant baseline load measurement and calculation method based on multi-dimensional factors, and the method specifically comprises the steps: screening load prediction correlation factors based on historical demand response information, and determining the correlation degree between each load prediction correlation factor and a load demand; setting a weight coefficient of each load prediction association factor based on the association degree, and constructing a prediction training data set according to the corresponding weight coefficient; an LSTM model is constructed, training is performed through the prediction training data set, model parameters are optimized through a sparrow optimization algorithm, and a baseline load measurement and calculation model is obtained; and calculating the baseline load of the virtual power plant in the target time period according to the baseline load measurement and calculation model. Baseline load prediction can be performed through the LSTM model, and parameter optimization is performed by using a sparrow optimization algorithm in the model training process so as to efficiently and accurately set LSTM network parameters, and at the same time, the measurement and calculation precision and the measurement and calculation efficiency of the baseline load are ensured.

The utility model provides a bearing sealing ring pulling-out device which comprises a base used for placing a bearing and a sealing ring and a pulling-out assembly arranged on the base, and the pulling-out assembly comprises a support fixedly arranged on the base and a dial gauge arranged on the support and used for displaying pulling-out force. The measuring end part of the dial gauge is provided with a pulling-out piece for pulling out, the pulling-out piece is arranged corresponding to the axis position of the bearing, the pulling-out piece is provided with a plurality of swingable hook parts, and the plurality of hook parts are circumferentially and uniformly distributed corresponding to the center of the bearing; the inner ring of the sealing ring arranged on the bearing can be positioned and pulled out through the plurality of hook parts, the tightness degree of the sealing ring is determined according to the pulling-out force, then the proper interference magnitude of the sealing ring is determined, and the swinging hook parts can adapt to the sealing rings of different sizes for measurement, so that the measurement accuracy is improved. The problem that normal use of the sealing ring and the bearing is affected by the magnitude of interference is prevented, and the stability and efficiency of measurement are improved through the device.

The invention belongs to the technical field of spacecraft navigation, and provides a pulsar TOA extraction method based on periodic coincidence optimal estimation. The method comprises five steps of dual-channel detection photon simulation, periodic coincidence analysis, coincidence time window optimization, TOA sequence generation and optimal TOA extraction analysis. The method comprises the following steps: constructing a threshold function by utilizing the periodic characteristics of pulsar signal photons, periodically sliding a time window to carry out coincidence processing, eliminating noise photons, and reserving the signal photons. And optimizing the coincidence time window to improve the noise rejection ratio to more than 90%, generating a TOA measurement sequence, and selecting the minimum TOA measurement value as the optimal estimation from the TOA measurement sequence. According to the method, the pulsar TOA measurement precision can be effectively improved, and especially in a short time and under a small detector area, the method has important significance for an X-ray pulsar navigation system to realize high-precision spacecraft autonomous navigation and positioning.

The invention discloses an impedance measurement method, an implantable medical device and an implantable medical system. The impedance measurement method comprises the following steps: determining an expected interval of a current value applied to an electrode contact combination according to an electrode identifier of an electrode and the currently measured electrode contact combination; releasing measurement voltage to the electrode contact combinations and collecting current values between the electrode contact combinations; when the current value is not in the current value expected interval, adjusting the measurement voltage according to the current value; and when the current value is in a current value expected interval, determining an impedance value between the currently measured electrode contact combination according to the measured voltage and the current value. The accuracy of an impedance measurement result can be improved.

The invention is suitable for the technical field of measurement, and provides a time interval measurement method and device, a time-to-digital converter and a medium, and the time interval measurement method comprises the steps: carrying out the delay processing of a received signal, and obtaining a plurality of delay signals; sampling the received signal at a first hopping edge and a second hopping edge of a sampling clock signal to obtain a first sampling moment; sampling the plurality of delay signals at a first hopping edge and a second hopping edge of a sampling clock signal to obtain a second sampling moment; and according to the first sampling moment and the second sampling moment, determining a receiving moment of the received signal, and obtaining a time interval between a transmitting moment of a transmitting signal and the receiving moment. According to the scheme, the measurement accuracy of the time interval is improved, and occupation of logic resources is reduced.

The invention relates to a hematocrit measurement method and device, and the method comprises the steps: applying an AC signal with a preset frequency to a to-be-measured blood sample, obtaining an impedance real part and an impedance imaginary part of the to-be-measured blood sample, substituting the ratio of the impedance real part to the impedance imaginary part into a preset linear equation, and obtaining the hematocrit of the to-be-measured blood, the method comprises the following steps: respectively applying alternating current signals with a preset frequency to a plurality of blood samples with different concentrations and different hematocrites to obtain impedances and phase angles of the plurality of blood samples under the preset frequency, and obtaining a ratio of an impedance real part to an impedance imaginary part of the plurality of blood samples under the preset frequency according to the impedances and phase angles of the plurality of blood samples under the preset frequency; according to the method, linear fitting is carried out on the ratio of the impedance real part to the impedance imaginary part of the plurality of blood samples under the preset frequency and the corresponding hematocrit, so that the linear correlation coefficient of the fitted linear equation can be effectively improved, and the measurement accuracy of the hematocrit can be effectively improved.

The invention relates to the technical field of live pig body size measurement, in particular to a non-contact pig body size estimation method and device based on a multi-position camera. The method comprises the following steps: firstly, acquiring back and side images of a pig through a multi-position camera, generating a standardized data set, then carrying out live pig attitude detection by utilizing an improved YOLOv11 model, screening out an image with an ideal attitude by introducing a deformable convolution and adaptive spatial feature fusion module, and carrying out real-time detection on the attitude of the live pig. Secondly, accurately positioning key point pixel coordinates related to the pig body size by using an HRNet key point positioning model, calibrating and correcting camera image distortion through internal and external parameters, calculating a conversion factor of pixels and actual size, and finally converting the pixel distance of the key points into actual body size data. According to the method, the multi-camera layout and the deep learning technology are combined, high-precision, automatic and stress-free pig body size measurement is realized in a complex breeding environment, and an efficient solution is provided for large-scale breeding and pig health management.

The utility model discloses a thermocouple measuring device, comprising a TC input module used for collecting thermocouple voltage and successively carrying out bias processing and signal filtering conditioning; the cold end compensation module is used for acquiring the RTD voltage of the cold end of the thermocouple on the field side; the ADC module is used for sending the RTD voltage and the thermocouple voltage to the MCU control unit; the MCU control unit is used for calculating the real voltage of the thermocouple and obtaining the actual temperature value of the thermocouple according to the real voltage; the isolation module is used for isolating signals of the field side and the control side; and the power supply module is used for supplying power to each module. According to the utility model, the isolation module and the TC input module are added, signals of a field end and a control end can be effectively isolated, the influence of ESD, surge and pulse on the device is effectively reduced, the design of an analog filter circuit, independent cold end measurement and the like is added, the external interference of the system is reduced, and the design of bias voltage is added to realize thermocouple short-line self-diagnosis. Through the design, the reliability and the measurement precision are improved.

The invention relates to a dry-type reactor fault monitoring method based on an interlayer current ratio, and the method comprises the following steps: 1, arranging a plurality of current sensors at a base of a dry-type reactor, and collecting the current value of each layer of the dry-type reactor; 2, the innermost layer current of the dry-type reactor serves as the reference, and the ratio K1 of each layer current to the innermost layer current is calculated; 3, the ratio K2 of the currents of the two adjacent layers of the dry-type reactor is calculated; 4, according to the change of K1 and K2, whether the dry-type reactor breaks down or not is judged, and the number of layers where the fault is located can be judged; the method has the advantages of being high in anti-interference performance, high in measurement accuracy, and capable of timely discovering operation faults and positioning fault encapsulation layers.

The invention provides a device and a method for measuring a near-wall aerodynamic coefficient of particles. The device comprises an airflow pipeline, a particle injection assembly and an electric field generation assembly. Wherein clean airflow with a stable flow direction is arranged in the airflow pipeline, the particle injection assembly is used for injecting charged particles into the airflow pipeline, the electric field generation assembly is used for forming a flow direction electric field and a vertical electric field in the airflow pipeline, and the flow direction electric field is used for providing electric field force opposite to the flow field for the charged particles in the airflow pipeline; a vertical electric field is used for providing electric field force in the direction opposite to the gravity for the charged particles in the airflow pipeline. By controlling the electric field intensity of the flow direction electric field and the vertical electric field, the charged particles can be kept static in the mainstream area and the near wall surface area respectively, and the aerodynamic coefficient of the charged particles in the near wall surface area is calculated based on the size of the charged particles and the position of the charged particles in the near wall surface area. According to the invention, the stress characteristics and stress rules of charged particles at different wall surface positions can be measured.

This invention discloses a downconversion fluorescence thermometry method based on bilinear mode, implemented using a hardware system. The hardware system includes a 280nm light-emitting diode, two convex lenses, and a Tb... 3+ :Cs2Na 0.9 Ag 0.1 The system comprises InCl6 temperature-sensing material, a grating spectrometer, an oscilloscope, a signal generator, a computer, and a thermostat. The specific implementation steps are: signal excitation and acquisition; temperature calibration; actual temperature measurement; and high measurement accuracy: VPR mode linear correlation coefficient R² ≥ 0.998, FL mode linear correlation coefficient R² ≥ 0.992, avoiding measurement errors introduced by the exponential bias or correction term of traditional FIR technology, thus fundamentally improving temperature measurement accuracy.

This invention provides a coating thickness measurement platform for chucks used in battery cells or wafers, which can actively avoid the suction hole positions of the chuck, thereby improving measurement efficiency and accuracy. It includes: a mounting base, including a worktable; a lifting platform; a three-dimensional drive module, including an X-axis drive module, a Y-axis drive module, and a Z-axis drive module; a film thickness measurement device, including a back plate, an incident light path assembly, and a reflected light path assembly, wherein the incident light path assembly and the reflected light path assembly are symmetrically arranged on both sides of the back plate about the central facade, and the thickness measurement points of the incident light path assembly and the reflected light path assembly are located below the film thickness measurement device; and an observation camera.

The application provides a measuring equipment monitoring device, a monitoring adjustment method, a thickness measurement method, a terminal and a medium, wherein the measuring equipment monitoring method comprises a repeatedly executed monitoring adjustment process; a single monitoring adjustment process comprises: measuring a reference wafer by a measuring equipment to obtain a monitoring data set; comparing the monitoring data set with a reference data set to obtain a difference condition; if the difference condition between the thickness monitoring data and the thickness reference data meets a thickness imbalance condition, performing alignment positioning adjustment on the measuring equipment; and if the difference condition between the warping monitoring data and the warping reference data meets a horizontal imbalance condition, performing horizontal adjustment on the measuring equipment. Through the repeatedly executed monitoring adjustment process, the state of the measuring equipment is monitored and maintained, the error of the measuring equipment is prevented from being too large, and the measurement accuracy of the measuring equipment is improved.

The utility model relates to the technical field of medical instruments, in particular to a portable leg circumference rapid measuring device which comprises a box body, a fixing block is fixedly connected to the outer surface of the box body, and a hinge shaft is arranged on the inner side wall of the fixing block. According to the portable leg circumference rapid measuring device, through the arrangement of the fixing block, the hinge shaft, the arc-shaped rod, the extension block, the rectangular clamping block and the connecting plate, during use, the hinge shaft limits the arc-shaped rod when the arc-shaped rod is rotated, meanwhile, the fixing block supports the hinge shaft, and when the arc-shaped rod is rotated to a certain position, the extension block enters the connecting plate, so that the arc-shaped rod is fixed; at the moment, a rectangular clamping block is clamped into a clamping groove in a connecting plate, the position of an arc-shaped rod is fixed, the two sides of the arc-shaped rod are closed, the device is convenient to hold and hang, the device is small and convenient, the portable effect is achieved, and the problems that a traditional leg circumference rapid measuring device occupies a large space and is inconvenient to carry, and consequently the device is limited are solved. And carrying is not convenient.

This application relates to the technical field of signal processing, and in particular to a signal processing method, apparatus, device, and medium for ultrasonic gas flow meters. The method involves acquiring an acoustic signal at a target flow point; determining the signal-to-noise ratio (SNR), peak salience, and waveform coherence of the acoustic signal; determining the signal quality index of the acoustic signal based on the SNR, peak salience, and waveform coherence; determining a reconstruction strategy for the acoustic signal based on the signal quality index and a preset decision range; reconstructing the acoustic signal according to the reconstruction strategy to obtain a reconstructed signal; and determining the propagation time based on the reconstructed signal to determine the gas flow rate at the target flow point. This method enhances the anti-interference performance of the time-of-flight ultrasonic gas flow meter signal waveform under complex operating conditions, improves the accuracy of propagation time measurement, and makes the measurement of gas flow rate more precise.

The utility model discloses a kind of elevator door opening and closing time and speed measuring device, including measurement terminal, speed measurement module and support. Measurement terminal includes shell, encoder socket and button trigger switch, encoder socket and button trigger switch are all set on shell, button trigger switch is used to press elevator door opening and closing button;Speed measurement module includes sucking disc, sucking disc lock catch, gyro wheel and rotary encoder, sucking disc lock catch is set on sucking disc, gyro wheel is coaxially connected with rotary encoder, and rotary encoder is electrically connected with encoder socket;Support is connected by multiple support arms one by one, the first end of support is movably connected with sucking disc, and the second end of support is provided with gyro wheel and rotary encoder. Can improve elevator door opening time, door closing time measurement accuracy, the running speed of car door in the process of elevator door opening and closing is continuously recorded by gyro wheel and rotary encoder. It is convenient to operate, and measurement precision is high, improve elevator installation debugging and detection efficiency.

The utility model discloses a novel device of quick determination biological incrustation soil expansion rate belongs to soil measuring equipment field. The device includes support assembly, measurement subassembly, soil body fixed assembly, water supply assembly, the soil body fixed assembly includes with water supply assembly connection's water tank, is placed in the water tank bottom's water -permeable stone, and the water -permeable stone is placed the sample to be measured, and the sample to be measured is connected bolt fixed on the water tank lateral wall, the measurement subassembly includes with support assembly connection's metal fixed disc, takes scale thin metal wire, circular ring's light waterproof metal sheet, the metal wire top is connected on the metal fixed disc or water tank lateral wall, and the metal wire bottom is conical needle structure, and it passes through waterproof metal sheet vertical or horizontal and inserts the soil body, and waterproof metal sheet is attached with the soil body surface. The device works, and the metal wire is buried into the soil sample vertically / horizontally, and the soil sample is saturated, and its expansion promotes waterproof sheet vertical displacement lifting / horizontal displacement, and the expansion rate is calculated according to the position change of sheet.

The invention discloses a remote pulse rate measurement system based on video images, and relates to the field of image communication technology. The remote pulse rate measurement system based on video images includes a video acquisition module, an image stabilization processing module, a motion correction algorithm module, and a real-time feedback and correction module. The acquisition module is used to acquire original image contrast, original sharpness, and original noise level parameters, capture continuous high-resolution video frames, and record the number of original video frames; the stabilized image processing module is used to analyze high-resolution video frames through a convolutional neural network model to predict pixel-level motion vectors, obtain predicted motion vectors, and obtain motion evaluation image stabilization evaluation values ​​through comprehensive analysis. Then, corresponding optimization measures are taken to solve the problem that motion artifacts caused by the head movement of the detected object or the movement of the camera affect the accuracy of pulse rate measurement.

The utility model relates to the technical field of semiconductor testing, and discloses a four-probe resistivity tester, which comprises a base and a support frame arranged on one side of the top of the base, a first driving piece is arranged on the top of one side of the support frame, and the first driving piece is connected with a detection module through a lifting connecting piece. The first driving part can drive the detection module to move in the Z-axis direction, a detection probe is arranged at the bottom of the detection module, a second driving part is arranged at the top of the base, a third driving part is arranged at the top of the second driving part, and a carrying table is arranged at the top of the third driving part. The second driving piece can drive the third driving piece and the carrying table to move in the Y-axis direction, and the third driving piece can drive the carrying table to rotate. Automatic alignment of the detection probe and the wafer is achieved, manual operation errors are avoided, the measurement accuracy is improved, meanwhile, an extrusion type fixing structure that the flexible clamping block is matched with the eccentric handle is adopted, rapid disassembly and assembly of the detection probe can be achieved, and later maintenance is facilitated.

The invention relates to the technical field of ampere meters, and discloses a micro-current detection ampere meter with an auxiliary calibration device, which comprises a supporting seat, and is characterized in that a moving mechanism is arranged at the top of the supporting seat, a second mounting plate is arranged at the top of the moving mechanism, and an ampere meter body is arranged at the top of the second mounting plate; positioning mechanisms are arranged on the two sides of the ampere meter body, and a moving mechanism is arranged on the top of the second mounting plate. According to the micro-current detection ammeter with the auxiliary calibration device, the ammeter body can be calibrated, the measurement error of the ammeter body can be reduced, the measurement accuracy of the ammeter is improved, the calibrated ammeter can respond to the current change more quickly and accurately, the working efficiency is improved, and the cost is reduced. Meanwhile, the purpose of moving the ampere meter body can be achieved, the ampere meter body can be used at different positions, and the limitation of the using position is reduced.

The embodiment of the invention discloses an automobile tire radius measurement method and device, electronic equipment and a storage medium. According to the scheme, in the moving process of the to-be-detected vehicle, continuous multiple frames of target images containing optical targets are collected, the optical targets are installed on tires of the to-be-detected vehicle, reference target images and observation target images are selected from the multiple frames of target images, and a pose transformation matrix between each observation target image and the reference target image is obtained through calculation; and performing decomposition processing on the pose transformation matrix to obtain a rotation matrix and a translation matrix, constructing a residual equation for determining the tire radius based on the rotation matrix and the translation matrix between each observation target image and the reference target image, and calculating the tire radius of the to-be-measured vehicle by minimizing a residual term of the residual equation. By measuring the target positions at multiple angles in the rolling process of the wheel, the center and radius of the circle are fitted, so that the measurement accuracy and efficiency of the tire radius are improved.

According to the liquid scale with the liquid entering from the bottom provided by the utility model, the liquid entering from the metering tank can avoid the phenomena of liquid splashing and bubble generation, and the overall height of the liquid scale can be reduced, so that the space occupied by equipment is reduced. The device comprises a liquid storage tank, a rack, a heating tank and a metering system, the liquid storage tank is located above the heating tank, the metering system comprises a metering tank, a weighing sensor, a liquid inlet pipe, a first control valve arranged on the liquid inlet pipe, a liquid outlet pipe and a second control valve arranged on the liquid outlet pipe, and the metering tank is installed below the liquid storage tank through the weighing sensor. A liquid outlet of the liquid storage tank is connected with a liquid inlet of the heating tank through a valve, the top of the heating tank and the top of the metering tank are respectively provided with a ventilation port, the liquid outlet of the heating tank is connected with a liquid inlet at the bottom of the metering tank through a first control valve, the top of the metering tank is higher than the bottom of the heating tank, and the bottom of the metering system is lower than the lowest liquid level of the heating tank.

The application provides a delay test system and method based on a Hall switch device, comprising: a magnetic field generation module containing a programmable current source and a coil to generate a precisely controlled magnetic field change; a temperature control module integrating a temperature sensor and a heating / cooling device to realize constant temperature or temperature scanning test; a signal acquisition module using a high-frequency sampling device to collect Hall device output signals; a data processing module using an embedded processor to realize automatic threshold detection and delay calculation; a general test interface using a test seat with replaceable probes to adapt to different packaged devices; a digital communication interface using an SPI or I2C interface to output test results; in the application, the main structures include a magnetic field generation module, a temperature control module, a signal acquisition module, a data processing module, a general test interface, a digital communication interface and a threshold calibration module, and these modules cooperate with each other to provide a solid foundation for precisely testing the delay characteristics of the Hall switch device.

The present invention discloses an original soil foundation pile diameter detection device, comprising a frame, a body sensor and a reel arranged in the frame for lifting the body sensor, a moving mechanism for driving the reel to move is arranged in the frame, a guide mechanism is arranged at the upper end of the body sensor, and a supporting mechanism for supporting the body sensor is arranged at the bottom of the frame; the measurement difficulty is reduced, and only one staff member is required to operate the device, and the device is set up in the pile diameter pit to be measured according to the steps, and the diameter and depth of the pile diameter pit can be measured by controlling the body to dive, and the image screen in the pile diameter pit can be viewed in real time, which reduces the difficulty of manual measurement by personnel, improves measurement accuracy, reduces safety risks, saves labor costs, and improves work efficiency. It fundamentally avoids the risk of manual drilling operations and avoids accidents in limited space operations.

The utility model discloses a tool for polishing the end face of an outer heat preservation layer of a cylindrical structure, and belongs to the technical field of precision machining. The device comprises a positioning sleeve, a polishing mechanism and a measuring mechanism, the positioning sleeve is fixedly arranged on a connecting cylinder in a sleeving mode, the peripheral face of the positioning sleeve corresponds to a cylinder body, the polishing mechanism and the measuring mechanism are rotatably arranged on the positioning sleeve in a replaceable and sleeving mode, the bottom of the polishing mechanism is a polishing face, and the measuring mechanism is arranged on the polishing face. The grinding face can rotate in the circumferential direction of the outer heat preservation layer to grind the top end face of the outer heat preservation layer, and the measuring end of the measuring mechanism can abut against the top end face of the outer heat preservation layer. The grinding tool integrates an outer thermal insulation layer end face grinding function and an end face height measuring function, can accurately grind the expansion portion of the end face of the outer thermal insulation layer of the cylindrical structure, can accurately measure the height of the end face of the outer thermal insulation layer, and has the advantages of being high in accuracy, high in efficiency, good in safety and the like.