24results about How to "Short measuring cycle" patented technology

The invention relates to the technical field of three-dimensional measurement, in particular to a linear structured light bearing bush and gear three-dimensional measurement method and system, and the method comprises the following steps: 1, data collection: employing a CCD camera arranged on a measurement platform to shoot laser images containing laser line patterns from different angles; step 2, image processing: extracting feature points in the laser image by using a computer vision algorithm; and 3, three-dimensional reconstruction: based on the known CCD camera parameters and the position change of the feature points on the to-be-measured object, obtaining three-dimensional data of the to-be-measured object by using a space coordinate conversion technology. And step 4, error correction: carrying out error analysis on the obtained three-dimensional data. And step 5, result output: outputting final three-dimensional measurement data of the to-be-measured object based on the corrected result. Through the automatic and intelligent measurement means, the measurement period can be further shortened, and the production 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 discloses a mold size measuring device and method for vehicle lamp injection mold processing, and relates to the technical field of mold size measurement. The mold size measuring device and method for vehicle lamp injection mold machining comprises an image measuring instrument body used for measuring the size of a vehicle lamp groove formed in a mold body, an annular light source installed on the image measuring instrument body and used for illumination, a point light source and a displacement sensor. The image measuring instrument body is provided with an adjusting assembly used for changing the inclination angle of the mold body, and the adjusting assembly comprises a sliding column which is fixed to the top of the positioning rod to drive the inclination angle of the mold body to be changed, so that the light source irradiates the interior of the vehicle lamp groove from multiple directions. According to the invention, shadow areas generated by single-angle irradiation of the light source are reduced or eliminated, which is helpful for obtaining clearer and more complete images, thereby improving the accuracy of measurement results, and improving the measurement efficiency and precision.

The utility model belongs to the technical field of gas extraction, and discloses a visual drilling and methane parameter measuring device which comprises a measuring head, a methane sensor, a flow sensor, a pressure sensor, a temperature sensor, an image sensor, a signal processor, a power supply and an image display instrument. According to the visual drilling and methane parameter measuring device, real-time measurement of parameters such as methane concentration, flow, pressure and temperature in a drilling hole and a collecting pipe and visualization of the internal structure of the drilling hole can be achieved at the same time, and the efficiency and safety of gas extraction are improved.

The present invention discloses a device for accurately locating the position of the internal parts of a lock, which is used to detect each blade arranged in an array on the lock core inside the lock, including: a scale plate is arranged on one side or two opposite sides of a fixed seat, and a plurality of scale grooves are arranged in an array on the inner side of the scale plate; a detection piece is movably arranged in the fixed seat, and both ends of the detection piece extend out of the fixed seat, an elastic component is arranged in the detection piece, and the elastic component part protrudes from the surface of the detection piece and can be engaged with the scale groove, and a sensor is arranged on the part of the detection piece extending into the lock; one end of the bracket is movably arranged in the fixed seat, and the other end extends out of the fixed seat, and the length of the bracket extending out of the fixed seat can be adjusted, wherein the bracket and the sensor are arranged on the same side of the fixed seat. The device can accurately locate the position of the internal parts of the lock without disassembling the lock, and then detect through the sensor on the detection piece, which can greatly save measurement costs and shorten the measurement cycle.

The utility model relates to the technical field of atmospheric science detection equipment, in particular to a CCN counter airflow control system with a high-precision flow regulation function, which comprises a high-precision flow regulation valve, a cloud condensation nucleus counter, an optical particle counter, an air storage bottle and an exhaust bottle. Compared with the prior art, the device has the advantages that the condensation nucleus counter, the optical particle counter and the high-precision flow regulating valve are arranged, so that the air inlet flow can be quickly changed, different supersaturation degrees can be generated, the measurement period is shortened, meanwhile, the advanced flow regulating technology and the flow stabilizing device are adopted, the stability and the uniformity of airflow are ensured, and the measurement accuracy is improved. The control device is electrically connected with the flow sensor and the temperature and pressure compensation module, so that the control system can quickly change the air inlet flow, the response time is shortened to the second level, and compared with a traditional method, the measurement speed is greatly increased, and the cloud condensation nucleus number concentration measurement is more accurate; and more reliable data support is provided for atmospheric scientific research.

The present invention discloses a near-infrared diffuse coherent spectrum local cerebral blood flow speckle imaging device and a detection method thereof. The imaging device of the present invention comprises a light source module, an optical heterodyne detection module and an imaging acquisition module. The present invention is based on optical heterodyne detection technology and laser speckle imaging technology. The laser emitted by the laser is divided into two paths, namely, local oscillator light and excitation light, through an optical fiber beam splitter. The excitation light is transmitted to the surface of the local tissue of the brain of the biological being to be tested through a source optical fiber probe. Then, the probe optical fiber probe uses a multimode optical fiber to collect diffuse reflection signal light carrying local blood flow information. The optical fiber coupler and the local oscillator light are homodyne interfered to generate diffuse coherent light, and a laser speckle image is formed on the photosensitive surface of a CMOS camera. Finally, the near-infrared diffuse coherent spectrum speckle contrast analysis algorithm is used to extract the flow velocity characteristic value speckle contrast by computer processing, and the actual relative flow velocity of the local cerebral blood flow is reconstructed, so as to achieve the purpose of non-invasively and accurately detecting the local cerebral blood flow velocity and flow size.

The hydrogen ion online analyzer comprises a machine body, a separated cavity is formed in the machine body, a cabinet door used for sealing the cavity is arranged on the surface of the machine body, the cavity comprises an electrical part, a measuring part and a storage part, the electrical part comprises an electrical cavity, and a control module used for online control is arranged in the electrical cavity; the measuring part comprises a detection cavity, a detection pool for detecting hydrogen ions is fixedly mounted on the inner wall of the detection cavity, the detection pool is in communication connection with the control module, and the detection pool is connected with a titration structure for injection; the advanced digital communication technology is adopted, online monitoring and data transmission can be achieved, the measuring system further has the advantage of being intelligent, data can be automatically recorded, data changes can be monitored in real time, the measuring period is shortened, the timeliness of measured data is improved, and a control basis is provided for a liquid making and acid preparing controller.

The invention discloses a device and a method for correcting photosynthetic activity turbidity of planktonic algae, and belongs to the technical field of planktonic algae monitoring, the device comprises an excitation emission optical structure, a light source driving module, a signal detection module and a main control module; according to the method disclosed by the invention, the relative increment relation between the turbidity scattering of the water body and the initial fluorescence is constructed by measuring a 750 nm water body turbidity scattering and combined light-induced fluorescence dynamic curve, and the influence of the turbidity scattering of the water body on the photosynthetic activity detection of the floating algae is corrected by calculating the correlation coefficient of the turbidity scattering of the water body and substituting the correlation coefficient into a photosynthetic activity correction model. The device is simple in structure, short in measurement period and non-invasive, can be used for underwater in-situ detection of the photosynthetic activity of the floating algae in a turbid water body, and provides a new way for rapid and accurate measurement of the photosynthetic activity of the floating algae.

The utility model relates to the technical field of measuring tools for civil engineering, and discloses a multifunctional measuring tool for civil engineering, which comprises two first measuring rulers, and a mounting mechanism and a moving mechanism are arranged at the tops of the two first measuring rulers. The measuring tool can synchronously measure instruments in a construction site up, down, left and right at the same time, so that a constructor can effectively obtain more information about a measured object, and the overall accuracy of measurement is remarkably improved; the measuring tool is installed by adopting a plurality of detachable measuring rulers and has certain portability, so that the measuring rulers can be easily carried, the measuring period is shortened, and the measuring efficiency is improved; meanwhile, the measuring tool can carry out multi-angle measurement, so that measurement results under different visual angles can be better verified, possible errors can be found and corrected in time, the overall measurement precision is improved, and the measuring tool is suitable for different site construction environments.

Embodiments of the present application provide a fluid flow field analysis method, an analyzer and an analysis system. The method is applied to a fluid flow field analyzer, which includes a plurality of ultrasonic transducers for mounting outside a measuring pipeline, and the plurality of ultrasonic transducers are distributed along a circumference. The method comprises: controlling each ultrasonic transducer and at least one of the other ultrasonic transducers to form at least one ultrasonic transducer pair according to a scanning mode; acquiring propagation time and distance information between the ultrasonic transducer pairs corresponding to N ultrasonic transducer pairs; determining a fluid flow rate of a path where the ultrasonic transducer pair is located according to the propagation time and the distance information corresponding to the ultrasonic transducer pair for any one of the plurality of ultrasonic transducer pairs; and determining a cross-sectional flow rate trend according to the fluid flow rates of the paths where the N ultrasonic transducer pairs are located. The method can directly capture transient flow field changes so as to enable an operator to measure and analyze the flow field online.

The invention discloses a threshold voltage drift and recovery monitoring circuit for a gallium nitride power device under various electric stresses, and relates to the technical field of gallium nitride power device testing. The circuit comprises a power supply module, a driving chip, a switch tube S1, a switch tube S2, a gallium nitride device to be measured, a load resistor R1, a discharge diode D1, an energy storage capacitor C2 and a voltage monitoring unit, and through on-off combination of the driving module and the MOS tube S2, measurement of device threshold voltage drift and recovery after three stresses (gate stress, off-state drain stress and switch stress) can be realized. A resistive load method is adopted, triangular wave grid voltage is generated by means of an energy storage capacitor, drain-source voltage and grid-source voltage are synchronously monitored to achieve threshold voltage extraction, and a precise source table is not needed; rapid discharging is achieved through the discharging diode, and the mode switching efficiency is improved. The circuit has the advantages that the threshold voltage drift test of a device under three typical stresses when the device works in an actual converter can be simulated, in addition, compared with the traditional threshold voltage drift test, the circuit can also realize the recovery test after the threshold voltage drift of the device, and the test efficiency is improved. The method has great value for fully researching the threshold voltage drift recovery characteristic of the device under the typical working condition.

The invention provides an intelligent steering wheel force characteristic measuring device, and belongs to the technical field of aviation assembly, and the device specifically comprises a support which is fixedly installed on a longitudinal shaft of a steering wheel; the driving motor is mounted on the bracket; the two fixing frames are both connected with the output end of the driving motor, and the two fixing frames are detachably connected with a grab handle of the steering wheel; the angular displacement sensor is installed on the support, a rotating shaft of the angular displacement sensor is coaxially connected with an output shaft of the driving motor, and the deflection angle of the steering wheel is detected; the torque sensor is mounted on the output shaft of the driving motor and used for detecting the torque of the output shaft of the driving motor; the output shaft of the driving motor and the rotating shaft of the steering wheel are coaxially arranged, the driving motor drives the two fixing frames to rotate and then drives the steering wheel, and through the processing scheme of the application, the measurement period is shortened, and the measurement accuracy and the repetition precision are improved.

The invention discloses a method for monitoring a ghosting effect of an illumination system of a photoetching machine, which comprises the following steps: step 1, the illumination system comprises a lens and a measurement platform, and a light intensity uniformity sensor is arranged on the measurement platform; setting a lens area, a peripheral area and a central area on a moving plane of the measuring platform; light leakage of the peripheral area can generate a ghosting effect. Step 2, turning on the illumination system, moving the measurement platform to move the light intensity uniformity sensor to the central area, measuring the first light intensity of the central area, and obtaining a reference value according to the first light intensity; and step 3, moving the light intensity uniformity sensor to a selected position of the peripheral area, and measuring second light intensity at the selected position. And step 4, dividing the second light intensity by the reference value to form a first ratio, and taking the first ratio as a scattered light monitoring value of the ghost effect. According to the invention, the sensitivity can be improved, the monitoring range can be expanded, the measurement period can be shortened, repeated measurement can be realized, measurement errors can be effectively eliminated, and the accuracy is improved.

The invention relates to a wire-drawing die concentricity measuring device and method, and the device comprises a main frame structure, and a light source lens, an electromagnetic induction measuring platform and a measuring lens which are disposed on the main frame structure, and a to-be-measured wire-drawing die is disposed on the electromagnetic induction measuring platform. The electromagnetic induction measurement platform is used for bearing the wire-drawing die and measuring the position coordinate of the central point of the wire-drawing die jacket; the measuring lens, the electromagnetic induction measuring platform and the light source lens are sequentially arranged from high to low, the light source lens is used for emitting light spots, and the light spots enter the light source lens through a die hole of the wire drawing die located on the electromagnetic induction measuring platform. And the light source lens is used for amplifying the light spot and imaging in an image sensor on the measuring lens. The device has the advantages that the whole device is free of moving parts, the structural strength of the system is high, the measurement precision is guaranteed, and the cost is low.

The invention provides a three-dimensional multi-plane phased array radar. The radar comprises a control module and a plurality of phased array antenna plates. The plurality of phased-array antenna plates are located in different planes in the space and are used for transmitting radar waves to the filling medium and receiving reflection waves reflected by the surface of the filling medium so as to obtain measurement signals of different angle areas in the space where the filling medium is located. And the control module is used for receiving and processing a measurement signal transmitted by the phased-array antenna plate. The radar provided by the invention can realize large-angle radar scanning through simple mechanical connection.

The invention discloses an inner and outer contour measuring device, which relates to the technical field of measuring devices and comprises a cradle assembly, a Y-axis sliding table, an outer contour measuring assembly, a first Z-axis sliding table, an X-axis sliding table, an inner contour measuring assembly and a second Z-axis sliding table. The cradle assembly comprises a product clamping assembly, a cradle body, a cradle support and a cradle driving device. The Y-axis sliding table is used for driving the cradle base to slide in the Y-axis direction. The outer contour measuring assembly is used for measuring the outer contour of the product. The first Z-axis sliding table is used for driving the outer contour measuring assembly to slide in the Z-axis direction, and the X-axis sliding table is used for driving the first Z-axis sliding table to slide in the X-axis direction. The inner contour measuring assembly comprises a climbing needle sensor which is used for measuring the inner contour of the product. The second Z-axis sliding table is connected with the inner contour measuring assembly and used for driving the inner contour measuring assembly to slide in the Z-axis direction. According to the device, measurement of the inner contour and the outer contour is completed through one-time clamping, equipment replacement is avoided, and a structural basis is provided for subsequent data fusion.

The invention discloses a digital image related subset adaptive algorithm for cross-scale measurement, which comprises the following steps of: firstly, intercepting sub-region windows from small to large at the central position of a speckle image; and carrying out binaryzation on the intercepted sub-area window image, and projecting a pixel point of which the pixel value is 1 after binaryzation to an X axis and a Y axis. According to a calculation rule, calculating the variance of the projection of the pixel point on the X axis and the Y axis, and calculating the difference value of the two variances; and finding a position where the variance difference value has a minimum value and tends to zero for the first time, and adaptively outputting a subset of the position. According to the method, when a DIC system measures a test sample in a cross-scale manner and processes speckle images with different characteristics under different scales, subsets with proper sizes are selected in a self-adaptive manner, the influence of human factors is eliminated, and the calculation precision of a displacement field is ensured.

The invention discloses a corrosion sensor and an application method thereof, and belongs to the technical field of corrosion detection. The corrosion sensor comprises a power supply, a corrosion measuring element, a first wire, a giant magnetoresistance sensor, a magnetic ring, an operational amplifier, a second wire and a power amplifier, the power supply and the corrosion measuring element are connected through the first lead to form a first loop; the giant magnetoresistance sensor, the operational amplifier and the power amplifier are sequentially connected through the second wire to form a second loop; wherein the first wire penetrates through the magnetic ring, the second wire is wound on the magnetic ring by n circles, and the giant magnetoresistance sensor is arranged on the magnetic ring and used for detecting the change of a magnetic field in the magnetic ring. The corrosion sensor can be placed in any corrosive environment, is not limited by any condition, is very wide in application range, can measure the corrosion strength in the environment in real time, is very short in measurement period, and improves the measurement efficiency.

This invention discloses a device and method for measuring the water content and wet / dry density of water-saturated sediments, comprising: a control console with two sets of columns symmetrically fixedly connected to the top of the console; two lifting mechanisms; a clamp seat positioned between the two sets of lifting mechanisms; a measuring assembly including a base, an inner cylinder, and an outer cylinder, with a balance hole at the top of the inner cylinder and a water storage tank between the inner and outer cylinders, and a weighing unit installed at the bottom of the water storage tank; a drying system installed on top of the two sets of columns; and a control system for controlling the operation of the entire device. This invention features a compact overall structure, with the columns and lifting mechanisms providing stable support, ensuring safe and reliable operation, and meeting the measurement needs of various laboratory scenarios.

The present invention discloses an in-situ measurement method and application of thermal conductivity of coating materials based on transient heat transfer, and the field of thermal conductivity measurement of coating materials includes the following steps: S1, building a measurement platform; S11, drilling radial measurement holes in the workpiece to be measured, and arranging thermocouples; S12, placing the workpiece to be measured in an insulating cylinder, and arranging a heater and a thermal imager; S2, heating the coating material and the workpiece to be measured, and obtaining the temperature of the measuring point during the heating process, and collecting the surface temperature of the coating material at the same time; S3, calculating the thermal conductivity and average thermal conductivity of the coating material that changes with temperature. The present invention adopts the above-mentioned in-situ measurement method and application of thermal conductivity of coating materials based on transient heat transfer, and performs in-situ measurement of the surface temperature of the coating material based on the principle of transient heat transfer, so as to achieve one measurement, and obtain all thermal conductivity information of the coating material within the measurement temperature range, thereby greatly shortening the measurement cycle and reducing the measurement cost.

The invention discloses a high-precision delay measurement system, and the system comprises a light source which is used for generating a light pulse signal with repetition frequency; the pulse width stretcher is used for stretching the optical pulse signal in a time domain so as to form a linear chirp signal; the beam splitter is used for splitting the linear chirp signal into a first optical signal and a second optical signal; the Mach-Zehnder interferometer comprises a first interference arm and a second interference arm connected to the delay line to be measured, the first interference arm is used for enabling the first optical signal to pass through, and the second interference arm is used for enabling the second optical signal to pass through; the beam combiner is used for enabling the first optical signal and the second optical signal to interfere so as to combine the first optical signal and the second optical signal into an interference optical signal; the photoelectric detector is used for converting the interference light signal into a corresponding electric signal; the oscilloscope is used for collecting the time shift of the interference waveform of the electric signal; and calculating the delay of the delay line to be measured according to the collected time shift. According to the method, a brand new measurement mechanism is established, so that the inherent measurement precision stably reaches the femtosecond magnitude.

This invention discloses a haze testing method for anti-glare films, relating to the field of film testing technology, for detecting the internal and external haze of anti-glare films. The method uses a film layer testing structure comprising an anti-glare film layer and an auxiliary testing layer that can be directly adhered to the anti-glare film layer. The anti-glare film layer has an uneven anti-glare surface formed by anti-glare particles; the auxiliary testing layer has a flexible adhesive surface that can be directly adhered to the anti-glare surface, and is light-transmitting. The testing method provided by this invention simplifies the measurement steps and saves measurement time by selecting an auxiliary testing layer that can be directly adhered to the anti-glare film layer and whose refractive index matches it, thus forming a film layer testing structure for testing. Simultaneously, by controlling parameters such as the adhesion angle between the auxiliary testing layer and the anti-glare film layer, the adhesion quality can be effectively controlled, avoiding defects such as air bubbles on the adhesion surface.

The invention relates to the technical field of aero-engine blade detection, in particular to a device and method for detecting the step difference of upper and lower edge plates of a double-mounting-plate blade. The detection device comprises a bottom plate and a positioning plate, and the positioning plate is vertically arranged on the top surface of the bottom plate; a first supporting pin and a second supporting pin are arranged on the bottom plate and are respectively used for supporting an upper edge plate and a lower edge plate of the blade; a stop pin is inserted in the positioning plate and used for abutting against the tail end of the lower edge plate. When in use, the blade is placed on the detection device, so that the lower ends of an upper edge plate and a lower edge plate of the blade are respectively supported on the first supporting pin and the second supporting pin, and the side planes of the upper edge plate and the lower edge plate of the blade are respectively propped against the positioning plate; the tail end of the lower edge plate abuts against the outer cylindrical face of the stop pin. The values of the detected surfaces of the tops of the upper margin plate and the lower margin plate are read through meter reading, and the difference value of two times of meter reading is calculated, namely the real step difference of the upper margin plate and the lower margin plate of the blade.