185results about How to "Improve measurement accuracy" patented technology

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 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 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.

This invention belongs to the field of time measurement technology and discloses a resource-saving short-chain time-to-digital converter and its conversion method. It utilizes a delay unit and conversion circuit to build a local oscillator, which flips the output state at fixed time intervals during a continuous high-level input signal. The time at which the local oscillator causes the level to flip is known. The time of the last flip is obtained using TDL and TDC, and the start and last flip times are obtained by recording the number of flips of the local oscillator. The resource-saving short-chain time-to-digital converter provided by this invention has good linearity, completely avoiding nonlinearity problems caused by inconsistent line lengths introduced across multiple resource blocks. The resource-saving short-chain time-to-digital converter has a simple and flexible structure, low resource consumption, and high utilization rate. It has good robustness and can be directly ported between different channels or even devices, and can correct temperature-induced drift online.

The utility model relates to building engineering technical field discloses building surveying height positioning auxiliary device, including wall, cylindrical pipe body and two hollow steel pipes, the outside of two hollow steel pipes is provided with distance adjusting mechanism, the bottom of distance adjusting mechanism is provided with clamping mechanism, distance adjusting mechanism is used for adjusting the distance of clamping mechanism, clamping mechanism is used for adapting different clamping object, distance adjusting mechanism includes two fixed plates, two fixed plates are fixedly connected in the outside rear side of two hollow steel pipes respectively. In the utility model, the threaded sleeve is moved along the thread groove by rotating the hand wheel, the connecting rod makes the two sides threaded sleeve synchronous movement, realizes accurate regulation clamping mechanism distance, ensures stable and no deviation when adjusting, makes clamping different surveying tool more convenient, provides reliable support effect for the stable installation and accurate positioning of the tool in building surveying.

The application provides a high-precision wave making method based on binocular imaging technology, and belongs to the technical field of ocean wave research. The application collects water surface images through a binocular imaging system and projects near-infrared speckle enhanced textures, adopts HDR imaging and adaptive exposure control to ensure image quality, uses a wave height regression model combined with variational optical flow deblurring and graph cut matching algorithm to obtain an accurate wave surface height field, establishes a double-layer game optimization model according to wave height deviation to calculate optimal wave making parameters, adjusts a wave making unit servo motor in real time through a multiple-input multiple-output PID controller, adopts cubic spline interpolation and S-curve acceleration and deceleration to realize smooth transition when switching waveforms, and forms a closed-loop feedback control cycle, so that the technical problem of insufficient wave height measurement accuracy in the closed-loop control of a wave maker is solved.

The application relates to the technical field of drilling equipment, and discloses an ultrasonic liquid level sensor test platform and a test correction method. The ultrasonic liquid level sensor test platform comprises a test frame and a control device. The test frame is sequentially provided with a water tank, an atomization generator and an ultrasonic liquid level sensor to be tested from bottom to top. The water tank is connected with a flow pump so as to adjust the liquid flow rate v in the water tank. The atomization generator is arranged in the water tank so as to adjust the water mist thickness d of the liquid level. The ultrasonic liquid level sensor is connected with the test frame through a lifting adjusting mechanism. The lifting adjusting mechanism is used for adjusting the liquid level distance h from the ultrasonic liquid level sensor to the liquid level. The flow pump, the atomization generator and the lifting adjusting mechanism are all signal-connected with the control device. The ultrasonic liquid level sensor can obtain correction values under different liquid level distances h and liquid level conditions, so as to compensate for the influence of the working environment on the measurement accuracy of the liquid level height.

This disclosure provides a pressure sensor and its fabrication method, belonging to the field of microelectronic component technology, aiming to improve the temperature stability of the pressure sensor. The pressure sensor includes: a substrate; at least one pair of capacitors located within the substrate, the capacitor pair including a first type of capacitor and a second type of capacitor; wherein, each capacitor includes a cavity, and a top electrode and a bottom electrode located on opposite sides of the cavity; a first protective layer located on the side of the top electrode of the at least one pair of capacitors away from the cavity; wherein, the first protective layer includes a first portion corresponding to the first type of capacitor and a second portion corresponding to the second type of capacitor, the thickness of the first portion being greater than the thickness of the second portion; and a support layer and an inter-film gap, the support layer being located on the side of the first protective layer closer to the first type of capacitor, and the inter-film gap being located between the support layer and the first type of capacitor.

The invention discloses a benchmark protection device, and relates to the technical field of benchmark protection, the benchmark protection device comprises a shell assembly, the shell assembly comprises a protection shell, the lower end of the protection shell is provided with a protection shell gasket, the upper end of the protection shell is provided with a cover plate, and a cover plate gasket is arranged between the protection shell and the cover plate; the opening and closing assembly comprises a connecting plate, a first rotating rod, a second rotating rod, a spring, a clamping piece, a pressing piece and a limiting piece; the box staff fixing assembly comprises a benchmark, a ball bearing and a box staff rotating bin. The beneficial effects of the invention are that through the cooperation of the cover plate and the opening and closing assembly, the protection shell is closed and opened, under the action of the clamping piece, the cover plate is ensured to be closed tightly, and the cover plate is kept open stably without affecting the measurement under the action of the internal force of the opening and closing assembly during opening; the benchmark is protected through the protective shell, the benchmark is prevented from being corroded and damaged by rainwater, dust and the like, durability of the benchmark can be better guaranteed, the telemeter rod fixing assembly is matched, a telemeter rod can be better fixed during measurement, manpower is saved, and meanwhile the measurement accuracy can be improved.

The utility model relates to the technical field of single crystal silicon rod detection, and provides a gantry type ground rail device for single crystal silicon rod detection, which comprises a ground rail mechanism, a gantry mechanism and a silicon rod rotating table, the ground rail mechanism comprises a base, a sliding rail and a sliding platform. Sliding rails are arranged on the two sides of the base respectively. A rack is arranged on the sliding rail; a sliding platform is arranged on each sliding rail; a servo motor is arranged on the sliding platform; gears are arranged at the output ends of the servo motors, and the gears are meshed with the corresponding racks; the gantry mechanism comprises a mounting plate and two gantry stand columns. The gantry stand columns are arranged on the corresponding sliding platforms, and a mounting plate is connected between the two gantry stand columns. The mounting plate is used for arranging a visual acquisition system; and the silicon rod rotating table is arranged on the base. According to the utility model, the measurement in a full-length range can be realized, and the stability of the visual acquisition system during automatic image data acquisition is ensured.

This utility model relates to the field of wall flatness testing technology, and discloses a wall flatness testing device, including a base and four universal wheels. A fixed housing is located at the center of the upper surface of the base. A lead screw moving device is located at the center of the interior of the fixed housing. A moving block is threadedly connected to the center of the outer side of the lead screw moving device. A lubrication device is located at the center of the upper surface of each fixed housing. A moving housing is located at the center of the front end face of each moving block. A toothed belt is located at the center of the rear inner wall of each moving housing. A moving rod is slidably connected inside a sliding groove. A transmission wheel is located at the center of the rear end face of the moving rod. A fixed block is located at the center of the front end face of the moving rod. A flatness testing instrument is located at the center of the fixed block. In this utility model, the lubrication device enables efficient movement of the flatness testing instrument and increases the motion accuracy and stability of the device, thereby improving the lubrication effect.

The utility model discloses a laser particle analyzer sample introduction mechanism, which comprises a sample introduction hopper, a feed inlet, a dispersion bin and a nozzle, the feed inlet is arranged at one end of the top of the sample introduction hopper, the dispersion bin is arranged at the bottom end of the sample introduction hopper, and second rotating shafts are arranged on two sides in the dispersion bin through supports. A blowing pipe is arranged on the second rotating shaft, nozzles are uniformly distributed on one side of the blowing pipe, a driving box is arranged on one side of each support, a second driving motor is arranged in each driving box, a driving gear is arranged at the output end of each second driving motor, one end of each second rotating shaft extends into the corresponding driving box, and the other end of each second rotating shaft extends into the corresponding driving box. And a driven gear engaged with the driving gear is arranged at one end of the second rotating shaft. The sample feeding hopper, the dispersion bin, the bracket, the second rotating shaft, the blowing pipe, the nozzle and the driving box are arranged, so that auxiliary airflow in different directions can be provided according to different samples, and the dispersion effect of the samples is optimized in a targeted manner.

This invention discloses a weak force sensor based on a teardrop-shaped micro / nano optical fiber and its fabrication method. The sensor comprises a biconical micro / nano optical fiber, a single-conical optical fiber, a quartz capillary tube, and a PDMS microsphere. The biconical micro / nano optical fiber is symmetrically bent, with the central waist region fiber forming a teardrop-shaped ring. The two ends of the teardrop-shaped micro / nano optical fiber ring are sequentially connected to portions of the waist region fiber, a transition region fiber, and a standard fiber. This invention utilizes the sensitive self-sensing capability of micro / nano optical fibers to achieve integrated signal input and output, greatly simplifying the measurement feedback mechanism of the sensing system and reducing overall cost. Furthermore, it is simple and intuitive to operate, reducing the technical requirements for operators. In terms of sensor fabrication, the main raw materials are standard optical fiber and quartz capillary tube, both of which are extremely low-cost. Therefore, this micro / nano optical fiber sensor exhibits significant cost-effectiveness.

The application discloses an aerosol correction method and system suitable for a hyperspectral resolution laser radar, and relates to the technical field of laser radar detection. Specifically, the method comprises the following steps: a first auxiliary detection channel and a second auxiliary detection channel specially added and containing iodine molecular absorption cells are used to filter out aerosol Mie scattering components in specific frequency laser echoes; pure first atmospheric temperature data is obtained based on data inversion of the auxiliary detection channels; atmospheric aerosol backscattering ratios are calculated in combination with reference channel data; the backscattering ratios are used to correct wind speed and temperature inversion models of the laser radar, and then corrected atmospheric wind speed and temperature data are obtained. The application aims to expand the minimum detection height of a hyperspectral resolution Rayleigh temperature and wind measurement laser radar by accurately quantifying and eliminating aerosol interference, and to realize high-precision synchronous measurement of wind speed and temperature in low-altitude and aerosol-rich areas.

The invention provides a material sample millimeter wave emissivity measuring system based on an integrating sphere, which belongs to the technical field of passive microwave / millimeter wave remote sensing and detection and comprises the integrating sphere, a radiation source, a to-be-measured sample table and a radiometer antenna or a whole machine, the radiation source is arranged on the inner side of the sphere wall of the integrating sphere; the to-be-tested sample table is arranged in the integrating sphere; a flange is arranged on the outer side of the ball wall of the integrating sphere, the radiometer antenna or the whole machine is arranged on the ball shell of the integrating sphere through the flange and is aligned with the to-be-tested sample table, and the readings of the radiometer at different angles are obtained by adjusting the position of the radiometer antenna or the whole machine on the ball shell of the integrating sphere, so that the emissivity of the material sample at different angles is calculated. The device and the method can be suitable for measuring millimeter wave band emissivity of material samples with different surface forms and different temperatures, the emissivity value of the material sample can be obtained without measuring the material temperature and the environmental radiation brightness temperature, and the device and the method are high in measurement accuracy, convenient to operate and high in practicability.

The utility model discloses a kind of precision length measuring tools, it is related to measuring tool technical field, including fixed seat, the right side fixed connection of fixed seat has main ruler, the cursor is set on main ruler, lubricating mechanism is arranged on cursor, the lubricating mechanism includes the storage box being set on cursor, spring tensioner and controller are fixedly connected in the lower end inner wall of storage box, recess is opened in the lower end of storage box, mobile plate is slidably connected in the inside of recess, by setting lubricating mechanism, when main ruler and cursor are used for a long time after instrument oil consumption, can be automatically sprayed quantitative instrument oil to the connecting place of two, without manually, it is very convenient, also can not cause instrument oil waste, guarantee the good use of measuring tool, avoid not timely correct addition instrument oil to lead to device wear and tear, greatly improve the service life of device and measurement accuracy.

The application relates to an intelligent safety monitoring method and system integrating multi-parameter health monitoring and emergency alarm positioning, a computer device and a storage medium. The method comprises the following steps: synchronously collecting PPG optical signals, piezoelectric pressure signals, motion posture signals and body surface temperature signals; dynamically calibrating a mapping relationship between pulse wave transmission time and blood pressure based on historical resting data, and calculating physiological parameters; extracting physiological and motion characteristics, inputting a lightweight AI model for real-time inference, and identifying the probability of a dangerous state; when the dangerous probability exceeds a threshold value and continuously exceeds a set time or an active trigger signal is received, starting local sound-light vibration alarm, satellite positioning and sending alarm information; if a false alarm cancellation operation is received, stopping the alarm and inputting the current parameters into the model for false alarm learning, otherwise repeating the alarm. The application realizes millisecond-level local danger identification and full-automatic emergency alarm, is not dependent on the cloud, and has high reliability.

The invention belongs to the technical field of material performance detection, and discloses a calibration device and method of a methylene blue standard solution for a machine-made sand MB value test, which can quickly judge the deviation degree of the concentration of the methylene blue solution, improve the accuracy of the concentration of the methylene blue solution and improve the accuracy of the MB value test. The stable property of the standard substance for calibration can ensure that the detection result of the engineering sand is accurate in a long time span, so that the engineering quality is ensured.

This utility model relates to the field of measuring the diameter of the wear groove of a wheel after lathe repair. Specifically, it relates to a measuring ruler for the diameter of the wear groove of a graphite-type cast steel urban rail vehicle wheel after lathe repair, comprising: a main ruler with graduation lines along its length; a fixed measuring claw, which is located at the left end of the main ruler and fixedly connected to it, and has a wear groove conforming measuring head on it, the shape of which matches the shape of the wear groove after lathe repair, and is used to fit into the wear groove after lathe repair; and a movable measuring claw auxiliary ruler, which is mounted on the main ruler via a frame, the frame having a first locking part for locking the movable measuring claw auxiliary ruler to the main ruler; the movable measuring claw auxiliary ruler also has a wear groove conforming measuring head on it. It can measure the inner diameter of the outer side of the rim of a graphite-type cast steel urban rail vehicle wheel and can improve the measurement accuracy.

A stereoscopic image scanning device comprises a linear scanning optical module, a planar scanning optical module, an image acquisition module, a motion platform and a control module. The linear scanning light module is used for projecting linear light to an object to be measured along an incident angle. The plane scanning light module is used for projecting plane light to an object to be measured along the same incident angle. The image capturing module is used for capturing the linear light or the planar light reflected by the object to be measured so as to obtain a first linear image or a planar image. The motion platform is used for controlling relative movement among the object to be detected, the linear scanning light module, the plane scanning light module and the image acquisition module so as to scan the object to be detected along a scanning direction.

The invention discloses a blood pressure detection device with a blood vessel positioning function and a blood vessel positioning method, and belongs to the technical field of medical detection equipment. The ultrasonic blood pressure detection cuff comprises a cuff body, an air bag and a Doppler blood flow detection module, the Doppler blood flow detection module comprises a position adjusting module and an ultrasonic sensor, the track direction of the position adjusting module is consistent with the winding direction of the cuff, and accurate positioning of the sensor can be achieved. Blood flow signals are detected through the Doppler ultrasonic technology, and the blood pressure can be measured more accurately in combination with the air bag pressurization and decompression process. The system can be widely applied to the scenes of family medical treatment, clinical diagnosis, ICU, operating rooms and the like.

This utility model discloses a novel column-type sensor, including a base plate and a sensor body. A balancing base is mounted on the top of the base plate, and the sensor body is mounted on the balancing base. A sensor sealing shell is mounted on the outer side of the middle part of the sensor body, and a protective outer cover is mounted on the outer side of the base plate. The protective outer cover has multiple through holes evenly spaced at the base plate. This utility model provides a double barrier between the sensor sealing shell and the protective outer cover, effectively preventing dust from entering the sensor and affecting measurement accuracy. The multiple through holes evenly spaced at the base plate allow for the dumping of dust without affecting weighing accuracy.