76results about How to "Improve measurement stability" patented technology

The invention relates to the technical field of nondestructive testing of constructional engineering, and discloses a laser measuring instrument for nondestructive testing of concrete cavities, which comprises a laser interference measuring assembly, a paraxial sound wave excitation assembly, coaxially arranged anti-interference equipment and a cooperative control processing system. The sound wave excitation assembly performs wide-area excitation on the concrete surface, and the laser interference measurement assembly receives returned light through a clean light path constructed by the anti-interference equipment. The cooperative control processing system establishes acousto-optic time-frequency association by using an adaptive control module, generates a phase compensation angle according to ranging data to eliminate phase lock loss caused by sound wave propagation delay, and monitors a spectral gradient to automatically trigger fixed-frequency locking to capture resonance response. And the signal analysis module uses the phase compensation correction signal, and outputs cavity features through dual data cleaning and thermodynamic diagram analysis. According to the invention, the problems of time-space synchronization and weak signal extraction of long-distance non-contact detection in a complex environment are effectively solved.

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.

The invention discloses a self-cleaning type gas ultrasonic flowmeter based on intelligent monitoring, and relates to the technical field of gas flow metering equipment. The flow meter comprises a flow meter body, a detection assembly, a filtering assembly and a built-in intelligent control module, and the intelligent control module carries a soft-pass algorithm system. The detection assembly comprises an ultrasonic sensor and a gas component analyzer, and the filtering assembly forms a filtering replacement mechanism through a first positioning plate, a second positioning plate, a rubidium magnet and a PTFE hydrophobic breathable film. The soft-pass algorithm system comprises dynamic calibration, multi-source data fusion, pollution grading early warning and life prediction algorithms, and can receive and process detection data, dynamically adjust detection parameters, monitor the state of a filter assembly and output early warning and life results. Software and hardware cooperation is realized through fusion of a hardware structure and a soft-pass algorithm, the measurement precision and stability are improved, the operation and maintenance cost is reduced, and the service life of equipment is prolonged.

The application relates to the technical field of semiconductors, and provides a micro health detection device. The device comprises a chip-level light source for emitting detection light; a photodiode module stacked above the chip-level light source and facing the light-emitting front surface of the chip-level light source, for receiving light signals transmitted or reflected by the detection light and converting the light signals into electric signals; and an analog front end module stacked above the photodiode module, for receiving the electric signals sent by the photodiode module and processing the electric signals. The device solves the problem of large size of the health detection device in the prior art, reduces the size of the health detection device, and makes the health detection device more suitable for wearable or portable health monitoring applications.

The invention relates to the technical field of measurement, in particular to a wheel type distance measuring device for road and bridge segmented construction and a distance measuring method thereof.The wheel type distance measuring device comprises a wheel, a handle and a counter, the counter is fixed to the handle, and the wheel is connected with the handle through an elastic assembly; the elastic assembly can adaptively adjust the distance between the wheel and the counter under the condition of an uneven road surface, the wheel and the counter are matched through the transmission assembly, and the transmission assembly can drive the counter to operate in the process that the wheel rotates and the elastic assembly stretches out and draws back; the brush is matched with the cleaning assembly, when the wheel rotates, the cleaning assembly drives the brush to brush the outer wall of the wheel in a reciprocating mode, the device is compact in overall structure and convenient and fast to operate, and the elastic buffering function, the stable transmission function and the automatic cleaning function are organically integrated; and the environmental adaptability and the working reliability of the wheel type distance measuring device in a road and bridge segmented construction scene are improved.

The application discloses a Φ-OTDR and MZ-Sagnac fusion system XPM crosstalk suppression method based on single-pulse period local symmetry pairing, and is suitable for a single-fiber composite sensing system which integrates a Φ-OTDR module and a MZ-Sagnac interference module in the same sensing optical fiber through a wavelength division multiplexing mode. The method of the application obtains a pulse trigger signal and an interference output signal of the Φ-OTDR, synchronously segments the interference output signal according to a pulse repetition period, determines a local time window and a center position of the local time window affected by XPM crosstalk in each single-pulse period, then performs a weighted pairing operation on equidistant sampling points on both sides of the center, obtains a local recovery signal and an XPM crosstalk estimation component, and corrects a contaminated signal by using the local recovery signal, so as to realize XPM crosstalk suppression, improve the phase demodulation precision, disturbance positioning ability and event identification reliability of the composite sensing system.

This utility model discloses an electronic working switch, a magnetic particle flaw detector starting circuit, and a magnetic particle flaw detector. The electronic working switch includes: a switch housing, a magnetic field sensor, a magnetic structure, and a magnetic shielding structure. The switch housing has an accommodating space for accommodating the magnetic shielding structure. The magnetic field sensor is disposed on the side wall of the switch housing, and the magnetic structure is disposed on the side wall and opposite to the magnetic field sensor. The magnetic shielding structure is slidably disposed in the accommodating space inside the switch housing to isolate the magnetic field between the magnetic structure and the magnetic field sensor. The electronic working switch in this application converts the positional change of the magnetic shielding structure relative to the magnetic field sensor into a change in the working signal output of the working switch, reducing wear and failure problems caused by mechanical contact and improving measurement accuracy and stability.

This utility model relates to the technical field of sensor probe holding devices, specifically a handheld magnetic ultrasonic probe, including an ultrasonic probe, a holding rod, an outer casing, a switch, an extension cable, and a spring. The outer casing is hinged to one end of the holding rod; one end of the spring is fixed to the lower top surface of the outer casing; a connecting top cover is fixed to the other end of the spring; a switch is fixed to the other end of the holding rod; an electromagnet is fixed to the bottom of the outer casing, and the switch is connected to the electromagnet via the extension cable; the ultrasonic probe is fixed to the bottom of the connecting top cover, and a magnetic shield is threadedly connected to the bottom of the connecting top cover. A signal line cover and a limiting post are threadedly connected to one side of the upper part of the magnetic shield. The ultrasonic probe's circuitry is connected to the measuring instrument via the signal line cover on one side. The electromagnet cover is attracted by the outer casing of the measuring box, thus receiving stable pressure from the ultrasonic probe. The spring inside the electromagnet cover compresses the ultrasonic probe, causing it to fit tightly against the outer casing of the measuring box, reducing the labor intensity of the operator.

The utility model relates to a kind of cylindrical part three-coordinate detection clamping devices, it contains mounting plate and bottom plate, mounting plate is fixed on bottom plate by bolt;Guide rail is fixed on bottom plate by bolt;Slider groove slides on guide rail;Cylindrical slider and slider groove are sliding slot cooperation;Positioning stand is nested in cylindrical slider by pin hole.The application has five parts positioning modules, and there are auxiliary positioning blocks with arc parts, part module, can clamp 1-5 cylindrical parts, parts are fixed in module, three coordinates establish positioning reference on fixed plate, five parts can be accurately positioned.It is independent individual by establishing sub-coordinate system to each part, and is evaluated separately;Save a lot of manpower, time and machine cost.

This invention discloses a rotating shaft health monitoring device and a rotating shaft system health assessment method. The rotating shaft health monitoring device includes: a two-dimensional cylindrical grating, etched on the non-working cylindrical surface of the rotating shaft and rotating with the shaft; a grating reading unit, fixed outside the two-dimensional cylindrical grating, used to collect the moiré fringe signal generated by the two-dimensional cylindrical grating rotating with the shaft, and decoupling tangential displacement, radial displacement, and axial displacement through a single grating reading unit based on the imaging scaling effect and grating line phase difference of the two-dimensional cylindrical grating; and a data processing unit, electrically connected to the grating reading unit, used to receive the moiré fringe signal and perform real-time processing. The rotating shaft system health assessment method is based on the rotating shaft health monitoring device. A single grating reading unit can simultaneously measure the displacement of three degrees of freedom: tangential, radial, and axial, covering all core health parameters of the rotating shaft; it realizes the direct measurement of the geometric deformation of the rotating shaft, and significantly advances the fault warning time.

The present application relates to the field of optical detection technology, and more particularly to a multi-probe centering detection method, which drives a standard spherical lens to rotate, and synchronously completes optical data acquisition by means of multiple independent detection light paths; respectively fitting the data collected by each channel to obtain the corresponding spherical center rotation track of each channel; relying on the spherical center track, solving the spherical center difference of each channel relative to the rotation reference axis, and repeatedly performing the calibration process to obtain the measurement standard deviation of each channel; replacing the measured lens and repeating the detection process to obtain the spherical center track and the spherical center difference; combining the measurement standard deviation of each channel, the consistency error of the measured spherical center difference and the track circle fitting residual error to calculate the fusion weight of each light path channel; based on the obtained weight, using the weighted least squares method to fuse the effective spherical center difference data and output the comprehensive spherical center difference of the measured lens. The present application adopts a multi-light path synchronous detection and data weighted fusion scheme, effectively suppresses the random error and system error of a single channel, and improves the overall measurement accuracy of the lens spherical center deviation.

This invention provides a superimposed 5-9 axis coordinate measuring machine, relating to the field of dimensional inspection equipment. The superimposed 5-9 axis coordinate measuring machine includes an X-axis measuring stage base, a Z-axis assembly, and a self-compensating Y-axis assembly. The self-compensating Y-axis assembly is mounted on the X-axis measuring stage base, and the Z-axis assembly is mounted on the self-compensating Y-axis assembly. The self-compensating Y-axis assembly is used to enable the Z-axis assembly to smoothly adjust its position along the Y-axis. A counterweight balancing component is installed at the lower end of the Z-axis assembly. This superimposed 5-9 axis coordinate measuring machine can handle large molds, housings, and wind power / aerospace structural components. The existing side head of the equipment performs point dimensional / geometric tolerance checks; another independent probe performs surface scanning. These functions are independent of each other, making it suitable for reverse engineering and full inspection of complex surfaces. Multiple independent probes are responsible for different areas, eliminating the need for frequent movement of the main spindle or turntable, reducing the number of axis linkages, and indirectly reducing the accumulation of errors in the superimposed axes.

The invention discloses a weak measurement-based sapphire low-temperature thermal expansion coefficient detection method and system, relates to the technical field of material thermophysical property precision measurement, belongs to the technical field of material thermophysical property precision measurement, and applies a weak measurement technology to low-temperature thermal expansion measurement of a sapphire block material. An interference light path containing a sapphire sample as an optical sensitive element is constructed, weak optical path difference (or phase change) caused by temperature change of sapphire is converted into observable significant shift in a spectral domain by utilizing a weak value amplification mechanism, and then the change of spectral characteristic wavelength along with temperature is measured; and in combination with the known sapphire refractive index temperature coefficient, the thermal expansion coefficient of the sapphire can be inverted with high precision. The device can realize non-contact and high-sensitivity measurement of the thermal expansion coefficient, has strong interference capability, and is suitable for precise measurement of the thermal expansion coefficient of sapphire and other transparent brittle materials in a full-temperature region from extremely low temperature to room temperature.

The invention discloses a line laser point cloud error compensation method and intelligent mobile equipment. The intelligent mobile equipment comprises a line laser module. The error compensation method is applied to the line laser module, and the line laser module comprises a line laser transmitter and a camera. The error compensation method comprises the following steps: step A, controlling a line laser transmitter to transmit laser rays to a calibration plate, and acquiring a laser image formed in the calibration plate through a camera; then executing the step B; step B, performing curve fitting by using the laser point cloud in the laser image to obtain a to-be-calibrated curve; then executing the step C; c, setting a target symmetry axis based on the extreme value of the curve to be calibrated, and controlling the curve to be calibrated to perform axial symmetry overturning by using the target symmetry axis to obtain a compensation curve; then executing the step D; and step D, performing compensation processing on the laser point cloud through the compensation curve so as to offset a measurement error existing in the laser image.

The utility model discloses a laser displacement sensor shell using a diffusion lens and a linear polarizer in a combined mode, and particularly relates to the field of photoelectric measurement. Comprising a lower shell, the upper cover of the lower shell is provided with a cover plate, the lower shell comprises a bottom plate, the surface of the bottom plate is vertically connected with a U-shaped first baffle, a second baffle is connected between the opening ends of the first baffle, and a first groove and a second groove are formed in the second baffle at intervals; the first groove is located at the receiving end of the laser displacement sensor. A first connecting plate is connected between the opening ends of the first grooves, and a first through hole matched with the first linear polarizer is formed in the first connecting plate; the second groove is located at the transmitting end of the laser displacement sensor; a second connecting plate is connected between the two inner side walls of the second groove, and two second through holes parallel to each other are formed in the second connecting plate. Through the shell, the laser displacement sensor body and each optical element can be integrally packaged.

The invention provides an optical fiber collimator, an MEMS optical acceleration sensor and a preparation method. The optical fiber collimator comprises a self-calibration coupling unit, a self-focusing collimation unit and a light beam steering adjusting unit. The self-calibration coupling unit is provided with an axial inner hole, and the self-focusing collimation unit and the light beam steering adjusting unit are both installed in the axial inner hole and are oppositely arranged. The first end face, facing the self-focusing collimation unit, of the light beam steering adjustment unit is not perpendicular to the axis of the axial inner hole. Light rays incident through the self-focusing collimation unit are reflected by the first end face to be turned and emitted out of the self-calibration coupling unit; the optical fiber collimator integrates the light beam steering and angle adjusting functions, after the system is installed, the direction of the emergent light beam can be optimized in real time by adjusting the light beam steering adjusting unit in the circumferential direction, and the installation difficulty is greatly reduced.

The invention discloses an embedded frameless torque servo motor, and relates to the technical field of frameless motors, the embedded frameless torque servo motor comprises an embedded frameless torque servo motor stator body, and the interior and the bottom of the embedded frameless torque servo motor stator body are respectively provided with a self-inspection early warning mechanism and a mounting mechanism; according to the invention, after the stator body of the embedded frameless torque servo motor is started, a controller can start an electric push rod, the electric push rod enables a mounting box to be close to a rotor body, and a detection separation blade is automatically attached to the inner wall of the stator of the motor and the outer wall of the rotor body, so that the consistency of measurement references is ensured; the gear ring and the mounting box are driven to rotate around the rotor body, so that the detection separation blade can detect the air gap around the whole rotor body, the detection range is ensured to cover the whole air gap area, local errors caused by fixed detection points are avoided, and the detection accuracy is improved.

The utility model relates to the technical field of rotational viscometers, and discloses a rotational viscometer convenient to position, the rotational viscometer comprises a positioning mechanism, a support assembly and a measuring assembly, and the positioning mechanism comprises a base and four piston tubes mounted at the bottom of the base. According to the rotational viscometer convenient to position, the rotational viscometer can be adsorbed and positioned on a contact surface through the arranged positioning mechanism, so that the influence caused by shaking is effectively reduced, the measurement precision and stability are improved, the operation is convenient and fast, and a user can conveniently move the rotational viscometer to a proper position; two first worms are respectively rotated to drive two lead screws to rotate through two first worm gears, so that two adjusting plates can move in the base, corresponding piston rods can be driven to move in piston pipes, suckers are adsorbed on a contact surface, and the adsorption positioning effect is realized; the height of the measuring assembly can be adjusted through the arranged support assembly, and finally the viscosity of the fluid can be measured through the arranged measuring assembly.

The invention discloses an automatic measuring device for measuring rotation precision of an inner ring and an outer ring of a small ball bearing, and belongs to the technical field of measurement. The automatic measuring device comprises a granite workbench, and an inner ring rotating part is embedded in the middle of the top of the granite workbench and can drive the inner ring of the measured bearing to rotate; a stand column and a top plate are arranged on one side of the inner ring rotating component, and a lifting component is arranged on the top plate to provide measurement load for a measured bearing. The aligning component is arranged at the lower end of the lifting component, so that interference errors during loading can be eliminated; an air tap and a turbine are arranged at the lower end of the aligning component and can drive the bearing outer ring to rotate; according to the invention, through comparative analysis of acquired data and a preset range, related parts are controlled to carry out remedy operation processing, the measurement stability is improved, the inner ring or the outer ring of the bearing can be respectively driven to precisely rotate on one instrument, the radial run-out and the axial run-out of the inner ring of the bearing can be indirectly and automatically measured, and the measurement accuracy is improved. And the radial run-out and the axial run-out of the bearing outer ring can be directly and automatically measured.

The utility model belongs to the technical field, and specifically relates to a die-casting end plate flatness measuring tool and measuring equipment. The die-casting end plate flatness measuring tool comprises a mounting seat, a base plate, a pressure sensor, a pressure sensor and a pressure sensor, the guide baffle and the limiting baffle are perpendicular to each other and are arranged on the bottom plate; the pressing device is arranged on the mounting seat and is used for pressing the to-be-tested product on the bottom plate; and the plurality of contact type displacement sensors are arranged on the bottom plate in a penetrating manner and are respectively used for acquiring Z-axis coordinate data of corresponding positions of the to-be-detected product. According to the die-casting end plate flatness measuring tool of the utility model, a product to be measured can be positioned through the guide baffle plate and the limiting baffle plate, the pressing device can press and fix the product to be measured, and the contact type displacement sensor can collect Z-axis coordinate data of a corresponding position of the product to be measured, so that the flatness of the product can be obtained. In other words, the die-casting end plate flatness measurement tool can replace a manual feeler gauge detection mode, and the measurement efficiency and stability are improved.

This invention belongs to the field of industrial vision measurement and discloses an intelligent measurement method and system for part dimensions based on natural language understanding and depth contour representation. It receives natural language measurement commands and transforms them into a structured measurement plan. Through a text-guided candidate target detection network, it locates candidate geometric targets corresponding to the measurement commands in the image to be measured, and determines a unique target instance through a semantic-geometric consistency screening mechanism. Based on the region of interest corresponding to the unique target instance, it performs continuous contour representation of the target through a contour reconstruction network with a continuous signed distance field, and analyzes the initial values ​​of geometric parameters through geometric parameter observation head regression. Based on the contour reconstruction results and the initial values ​​of geometric parameters, it calculates the pixel domain size and generates a report through zero-layer point set extraction and few-step geometric refinement. This invention forms a closed-loop link from natural language to visual instance to differentiable geometric refinement, which can reduce interaction costs and improve measurement accuracy and stability.

This invention discloses an indoor mid-to-long-range camera heart rate detection method and system with resistance to environmental interference. The host computer acquires one video stream from each camera to determine the video frame sequence of the current optimal viewing angle. Face detection, tracking, and ROI localization are performed on the video frame sequence to obtain the face ROI region for each video frame. Rigid motion noise filtering is applied to the video frame sequence to obtain an aligned frame sequence and a reference frame sequence. The face ROI region of each aligned frame is determined based on the face ROI region of the reference frame. The ROI signal is determined based on the face ROI region of the aligned frame, and non-rigid noise is filtered out to obtain a pulse wave signal. The heart rate value corresponding to the current sliding window is determined based on the pulse wave signal, and a corresponding quality score is determined. This, combined with a preset correspondence between distance and available focal length, allows for adaptive adjustment of the camera focal length. This invention exhibits high robustness, accuracy, and stability.

The utility model discloses a mechanical large-diameter thread outer diameter measuring device, which comprises a bottom plate, and two positioning sliding rods and two measuring sliding rods which are arranged on the bottom plate, and the two positioning sliding rods can move relatively along the upper surface of the bottom plate, so that the two positioning sliding rods are close to each other to radially clamp a boss of a workpiece to be measured. The two measuring sliding rods can move relatively along the upper surface of the bottom plate, so that the two measuring sliding rods are close to each other and respectively cling to two sides of a thread of a to-be-measured workpiece, scale marking lines are arranged on the upper surface of the bottom plate, and the lower ends of the measuring sliding rods are aligned with the scale marking lines. The length limit of an outer measuring claw of a vernier caliper is broken through, the large-diameter thread diameter measuring device is suitable for measuring the outer diameter of a large-diameter thread, the measurable thread diameter range is wide, the large-diameter thread diameter measuring device is particularly suitable for batch detection of a production line, personal errors are reduced through a positioning sliding rod and scale marks, the measuring precision and stability are improved, only three steps of fixing, pulling and reading are needed during operation, the single-time measuring time is short, and the efficiency is improved. The operation process is simplified, and stable fixation, automatic adaptation and rapid reading are achieved.

The application relates to a double-coaxial microstrip antenna sensing system for horizontal oil-water two-phase flow related velocity measurement, which comprises a test pipeline, a central insert and two coaxial microstrip antenna sensors fixed upstream and downstream of the test pipeline respectively and having the same structure, the coaxial microstrip antenna sensor comprises a receiving microstrip antenna close to the outside of the test pipeline and a transmitting microstrip antenna installed in the central insert, the receiving microstrip antenna comprises a receiving antenna ground plate, a receiving antenna radiation plate and a receiving antenna port, the receiving antenna ground plate and the receiving antenna radiation plate are coaxial, and the receiving antenna ground plate is located outside the receiving antenna radiation plate; the transmitting microstrip antenna comprises a transmitting antenna radiation plate, a transmitting antenna ground plate and a transmitting antenna port, the transmitting antenna ground plate and the receiving antenna radiation plate are coaxial, and the transmitting antenna ground plate is located inside the transmitting antenna radiation plate. The application can meet the high-precision flow velocity detection requirement under complex flow patterns.

The invention discloses a low-voltage large-current measuring device and method for an electric furnace transformer, and belongs to the technical field of transformer current measurement, and the device comprises a deformation installation assembly, an installation fixing assembly, a low-voltage large-current measuring assembly, a detachable fixing assembly, a locking assembly, and a threading assembly. The device is composed of the deformation installation assembly, the installation fixing assembly, the low-voltage large-current measurement assembly, the detachable fixing assembly and the locking assembly, and deformation can be adjusted according to the positions of all to-be-measured cables on the low-voltage large-current side of the electric furnace transformer for adaptive installation and adaptive installation of the low-voltage large-current measurement assembly. The device is suitable for scenes with complex distribution of positions of all to-be-measured cables on the low-voltage large-current side of the electric furnace transformer, can measure all cable currents at one time, and is time-saving and labor-saving.

This invention provides a system for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. This invention further provides a method for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. The system and method provided by this invention, based on central sample flow sampling, achieves efficient sampling of nanoparticles. Utilizing the high charging efficiency of a unipolar charging device for nanoparticles, the nanoparticles are charged and efficiently transported to the inlet of a nanoparticle size sieving device. Through a special aerodynamic design, the nanoparticles are efficiently transported through the electric field between the electrode plates to the particle number concentration and chemical composition detectors, demonstrating excellent application prospects.

This invention discloses a method for in-situ simultaneous and rapid determination of odor and greenhouse gases, belonging to the field of environmental monitoring technology. The method includes: acquiring multiple channels of target gases and simultaneously preprocessing them to generate homogeneous gas samples; using a main detection sensor group and an auxiliary compensation sensor group for parallel collaborative sensing processing to obtain current multi-source sensor data; establishing a dynamic compensation mapping model to characterize the measurement error of gas concentration; inputting the current multi-source sensor data and corresponding current environmental parameters into the dynamic compensation mapping model for calculation, and combining it with the current main detection raw reading to generate current target gas concentration data; associating and packaging multiple sets of current target gas concentration data to generate a synchronous data package and outputting it. By combining the collaborative sensing processing of main and auxiliary sensors with the dynamic compensation mapping model, the method can achieve simultaneous and accurate determination of odor and greenhouse gas concentrations under complex backgrounds.

This utility model relates to an automated spectral detection device for coated film layers, comprising a frame and a conveyor belt rotatably mounted on the frame via two rollers. A U-shaped frame is mounted on the frame, and a spectrometer is mounted on the U-shaped frame via a swing assembly. A drive assembly is mounted on the frame, and the drive assembly is connected to the swing assembly and rollers via a transmission structure and a linkage assembly. When the drive assembly is running, the swing assembly and rollers will run alternately to achieve mutual coordination between the conveyor belt and the spectrometer. Through its unique structural design, this utility model realizes the automated reciprocating swing of the spectrometer, which allows the spectrometer to automatically change its detection angle, effectively reducing the detection blind zone at the edge of the coating and improving the comprehensiveness and accuracy of the detection. At the same time, the linkage between the drive assembly, rollers, and swing assembly realizes the coordinated work of the conveyor belt and the spectrometer, improving the detection efficiency.

This invention discloses a stripe projection 3D imaging system based on a Micro-LED array. Its 3D information acquisition module consists of an integrated packaged Micro-LED driver board, a Micro-LED array, a micro-projection module, and a CCD camera. The 3D reconstruction module utilizes a computer. The micro-projection module is equipped with a plano-convex lens and a mechanical focusing damping structure, and is separately arranged in the front and rear optical paths of the Micro-LED array. The system's workflow is as follows: the driver board reads pre-stored stripe pattern data and timing-controls the Micro-LED array to output coded structured light stripes; the focusing structure adjusts the object distance in the optical path, focusing and scaling the stripes before projecting them onto the surface of the object being measured; the CCD camera simultaneously acquires a sequence of deformed images modulated by the object's shape and transmits it to the computer; the computer combines a multi-step phase-shifting algorithm and Gray code rules to complete phase calculation and unfolding, and, combined with a preset phase-height mapping relationship, reconstructs the 3D shape and point cloud data of the object being measured. This invention enables low-cost, miniaturized, and high-performance 3D shape measurement.

The utility model relates to the technical field of medical instruments, and discloses a drainage liquid real-time monitoring and early warning device based on a near infrared spectrum technology, which comprises a shell used for being fixed on a drainage tube and adopting a telescopic structure; the light source emitting module is arranged on the shell and used for emitting near-infrared light to the drainage liquid in the drainage tube; the photoelectric detection module is arranged on the shell, is opposite to the light source emitting module and is used for detecting an optical signal of the near-infrared light after passing through the drainage liquid; the relative distance between the light source emitting module and the photoelectric detection module is adjusted through a telescopic structure; and the control module is electrically connected with the light source emission module and the photoelectric detection module, and is used for receiving the light signal and triggering an early warning signal when the light signal is abnormal. The device can monitor the concentration and quality of liquid components in drainage liquid in real time, automatically monitor the state of the drainage liquid and automatically give an early warning when the drainage liquid is abnormal, so that the problem of careless omission caused by manual monitoring is avoided.