26results about How to "Fast measurement" patented technology

The invention relates to a method for localizing an emitter (F) in a sample (S), the method comprising illuminating the sample (S) with a stationary circular excitation beam (E), acquiring fluorescent photons; and estimating the position of the emitter (F) in the sample (S) from the acquired fluorescent photons. The invention also relates to a device (1) for localizing an emitter (F) in a sample (S), the device comprising an illumination means (10), an acquisition means (20) and a processing means (30), and to a computer program comprising instructions for causing the device (1) to perform the method for localizing an emitter (F).

The application discloses a method for determining a modulation signal of optimal modulation depth of a reflective all-fiber current sensor, and amplitude U of a modulation signal corresponding to the optimal modulation depth H is determined by adjusting amplitude of a modulation signal of a phase modulator PM When the peak-to-peak value of the light power received by the photodetector is maximum and the number of extreme points in one period is 3, the amplitude U of the modulation signal corresponding to the modulation depth H = π rad is obtained PMπ Thus, the electro-optic modulation coefficient k of the phase modulator is determined AP When the optimal modulation depth H o = 1.84 rad, the amplitude of the modulation signal corresponding to the optimal modulation depth is U PMo The method realizes online measurement of the half-wave voltage of the phase modulator, determines the modulation signal corresponding to the optimal modulation depth through the theoretically optimal modulation depth, does not introduce additional devices, and is simple and convenient to operate; and the application is not limited to the reflective all-fiber current sensor, and is suitable for any interference optical path structure which needs to measure the half-wave voltage.

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 application discloses a kind of multi-stage coarse high-precision novel translational rotary platform photoelectric encoding measurement methods.The application relates to engineering surveying technology, precision machining and other fields, solve the problem that the measurement accuracy of existing photoelectric translational rotary encoder needs to be improved.Cameras are fixed on rotating or translating devices, and the encoding device of the encoder is fixed on a stationary frame.The encoding device of the encoder is composed of uniformly distributed encoding arrays and fine measurement spots.During the rotation or translation of the motion device, the camera captures the encoding array image and fine measurement spot image of the encoder.According to the encoding array image, the coarse-precision absolute position measurement value of the rotation angle is identified.According to the number of displacement pixels in the fine measurement spot image, the coarse-precision absolute position measurement value is subdivided to one-tenth of the total number of column pixels of the camera for measurement accuracy.According to the barycentric algorithm, the high-precision measurement value of the rotation angle or translation amount is calculated, which can significantly improve the photoelectric encoding measurement accuracy.

The application discloses a core body temperature measurement method, a core body temperature measurement system and a core body temperature measurement device, and belongs to the technical field of body temperature measurement. The method comprises the following steps: acquiring a heating side temperature, a skin side temperature, a skin side pressure and heating driving information within a preset time window after the start of active heating; calculating an interface thermal resistance between a heating probe and the skin of a target object according to the skin side pressure; calculating a human body side equivalent heat flow density based on a non-steady-state heat balance model according to the heating side temperature, the skin side temperature and the heating driving information; and determining a non-steady-state core body temperature of the target object according to the skin side temperature, the interface thermal resistance and the human body side equivalent heat flow density. The above scheme can quickly obtain the core body temperature without waiting for the probe and the skin to reach a steady-state heat balance, thereby improving the core body temperature measurement speed while ensuring the measurement accuracy of the core body temperature.

The invention discloses a TDI camera-based product detection method and system, and a medium. The method comprises the following steps: installing a line light source; the light intensity of the line light source is controlled to be in periodical light and shade stroboflash according to stripe distribution, so that stripe images meeting the phase shift method under the RGB three channels are obtained; analyzing stripe images under three channels of RGB, and calculating and obtaining original height data of all pixel positions under each channel of RGB based on phase deflection; traversing the original height data of all pixel positions so as to obtain final height data of the current pixel position through weighted averaging according to RGB channel weights corresponding to the current pixel position; according to the method, the TDI true color camera is used for collecting the three-channel fringe images, channel crosstalk and response inconsistent errors are restrained through a self-adaptive weighted average mechanism, high-speed measurement is guaranteed, meanwhile, the reconstruction precision and robustness of phase deflection are remarkably improved, and false data introduced by interpolation are avoided.

This invention discloses a three-degree-of-freedom autocollimation angle measurement device and method based on a crosshair reticle, comprising a probe system, a target mirror system, and a calculation system. The probe system emits a collimated beam containing crosshair image information into the target mirror system. The target mirror system separates the collimated beam containing crosshair image information into two reflected beams parallel to the optical axis, each reflecting beam containing crosshair image information. The probe system also receives the two reflected beams parallel to the optical axis and images the crosshair images corresponding to the two reflected beams. The calculation system calculates the pitch and yaw angles of the target based on the initial and current coordinates of the crosshair image corresponding to one reflected beam parallel to the optical axis, and calculates the roll angle of the target based on the initial and current tilt angles of the crosshair image corresponding to the other reflected beam parallel to the optical axis. This invention enables rapid and high-precision three-degree-of-freedom angle measurement of distant targets.

The utility model relates to the field of ultrasonic detection, in particular to an ultrasonic probe with a measuring and positioning device. The utility model aims to provide an ultrasonic probe with a measuring and positioning device so as to improve the measuring speed and the defect positioning accuracy. According to the technical scheme, the ultrasonic probe with the measuring and positioning device comprises a probe body and is characterized by further comprising a measuring tape and an impact firing pin, a tape box of the measuring tape is fixed with the probe body; and a tape band of the measuring tape is fixed with the impact firing pin.

The application relates to a distributed optical fiber sensing system and discloses a fast measurement BOTDA sensing device based on chaotic light polarization orthogonal detection, which comprises a narrow-line-width laser; signals output by the narrow-line-width laser are divided into two paths: one path is used as injection light to enter a chaotic light generation module to make the module output chaotic light with a wide spectrum, the chaotic light is used as detection light and sequentially connected with one end of a sensing optical fiber after passing through an optical isolator, an electro-optic modulator, a polarization maintaining optical fiber and an erbium-doped fiber amplifier; the other path is used as pump light and sequentially connected with the other end of the sensing optical fiber after passing through a semiconductor optical amplifier and a first circulator; after polarization orthogonal detection light is transmitted to the other end of the sensing optical fiber, the polarization orthogonal detection light is output through a first circulator output end and is coherently detected and data processed by a coherent detection module to obtain a Brillouin gain spectrum of the sensing optical fiber along a line. The application can realize Brillouin gain sweep-free measurement and improve the measurement speed.

The application discloses a network service quality prediction method and device, comprising the following steps: constructing a server distribution map according to a geographical position, searching for a core point by using a density clustering method; collecting QoS data of an edge cloud server corresponding to the core point, generating a language description set based on a Pre-Trained Transformer model; generating a characteristic word sequence of each edge cloud server based on the language description set and node characteristics, and generating a corresponding semantic embedding vector in a sliding window mode; constructing a graph structure based on the QoS data, and extracting features by using a graph convolutional neural network to obtain a topological feature vector; and splicing the topological feature vector and the semantic embedding vector, and predicting the network service quality of the edge cloud server by using a multilayer perceptron. The application integrates semantic information and space-time information to jointly complete the service quality prediction task, and improves the prediction accuracy.

This utility model relates to a camshaft angle measuring instrument. It includes a base plate, with a detection center and a follower center at each end of the base plate for abutting the camshaft. An encoder for detecting the rotation angle is mounted on the detection center, and a positioning component is provided between the detection center and the follower center. A limiting component is provided on one side of the base plate. This invention solves the technical problem that in the prior art, camshaft cam detection is generally done manually, measuring the angle of each cam on the camshaft. However, the camshaft has a large number of cams with varying angles, and each measurement requires rotating the camshaft, resulting in low efficiency and significantly impacting accuracy due to the frequent need to re-fix the camshaft after rotation.

The application discloses a ranging method, comprising: obtaining a mapping relationship between serial numbers of actual data boxes and serial numbers of preset data boxes, wherein each actual data box is mapped to at least one preset data box; obtaining ranging data, assigning storage space to the actual data boxes and storing the ranging data; determining a target data box and a serial number of the target data box according to data distribution of the ranging data in the actual data boxes; determining a target value of a preset data box corresponding to the target data box according to the mapping relationship between the serial numbers of the actual data boxes and the serial numbers of the preset data boxes and according to a preset algorithm; and determining a distance of a measured target according to the target value of the preset data box and a width of the preset data box. The application also provides a ranging system, which can reduce storage space.

The utility model relates to the technical field of water quality detection, and discloses a device for measuring manganese content in water, which comprises a mounting shell and a spectrophotometer main body, a photometer mounting port is arranged at the top of the mounting shell, and the spectrophotometer main body is arranged at the top of the photometer mounting port. According to the portable spectrophotometer disclosed by the utility model, the spectrophotometer mounting port is arranged, so that the installation of the spectrophotometer main body is facilitated, the spectrophotometer main body is a handheld portable spectrophotometer and is relatively convenient to carry, and an external water source is pressurized and pumped into the detection sample cup by the sample lead-in assembly; a sample in the detection sample cups is guided to the detection end of the spectrophotometer main body by the sample guide-out assembly, so that sampling and detection are completed, the plurality of detection sample cups can be used for sampling and storing water samples on different field sites respectively, the measurement efficiency is high, and the whole device is relatively small and relatively convenient to carry; and sampling and classified storage of field samples are facilitated, the measuring speed is high, and the measuring convenience is high.

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 utility model discloses a cast-in-place concrete floor thickness measuring device which comprises a base, the top of the base is fixedly connected with a base station, the outer side wall of the base station is in threaded connection with a lead screw, the outer end of the lead screw is fixedly connected with a knob, and the lead screw penetrates through the base station and is rotationally connected with a damping fin. The device comprises a base table, a measuring pipe is slidably connected in the base table in a penetrating mode, scale marks are arranged on the outer side wall of the measuring pipe, a movable rod is slidably connected in the measuring pipe, a sealing cover is rotatably connected to the top of the movable rod, a cone is fixedly connected to the bottom of the movable rod, sliding grooves are formed in the two sides of the cone, and movable plates are slidably connected in the sliding grooves. According to the utility model, the base station, the measuring pipe, the movable rod and the scale marks are matched with one another, and a constructor does not need to cooperate with a floor bottom supporting plate, so that the floor thickness measuring work can be operated by a single person, a large amount of time and manpower are saved, and the floor thickness measuring speed is improved.

The invention relates to an immunoassay kit, an immunoassay method and an immunoassay system. The kit comprises a reagent 1 and a reagent 2 which are the same in component, the total content of specific capture molecules in the reagent 1 is different from the total content of specific capture molecules in the reagent 2, and the specific capture molecules can be specifically combined with target molecules to be detected. According to the present invention, with the immunoassay method using the kit, the HOOK effect sample problem can be solved, the method is not limited by the detection range, the high-value sample concentration reaching the level of 106 ng / ml can be directly measured, and the repeatability is good.

The invention discloses a petal parameter analysis method based on machine vision. Relates to the field of image processing methods. A petal image is acquired through an image acquisition device, a petal area is automatically identified by using a deep learning detection algorithm, accurate segmentation is realized, and a binary image and a color image of petals are obtained. On the basis, morphological parameters of the petals are extracted, color changes of the petals are analyzed, and shape parameters of the petals are further analyzed in combination with a segmentation result. According to the method, diversified sample training is adopted, the accuracy of region detection and parameter extraction is improved, and automatic and quantitative analysis of petal morphology and color features is realized. The method has the advantages of high efficiency, accuracy, wide applicability and the like, and is suitable for the fields of flower breeding, quality evaluation and the like.

The application discloses a kind of urban space resilience measurement method and system based on rain flood process, belong to urban and rural planning technical field.The application considers the dynamic performance change that different function services expression is supported in actual extreme rain flood process city space, and the ability set of multiple city service functions under the analysis of urban space resilience is supported multiple space elements.By coupling the process and result measure of resilience, the measurement framework of the multi-functional service "process-result" coupling of urban space resilience is established, the direct measurement of process resilience under multiple extreme rainfall scenarios and the indirect measurement of result resilience based on process resilience coupling are unified, the quantitative measurement of urban space resilience is limited in the target domain range of specific disaster influence, so that the pertinence and operability of resilience measurement are stronger, and the accurate measurement of urban space resilience under rain flood scene is realized.

The utility model relates to the technical field of measuring equipment, in particular to a self-adaptive multifunctional chest circumference and abdominal circumference measuring mechanism for dairy cows, which comprises a bottom plate, a measuring mechanism and a binding mechanism, two ends of the top of the bottom plate are fixedly connected with support frames, and one end of the bottom plate is fixedly connected with a guide plate. According to the device, the measuring mechanism is arranged between the two limiting frames, the first motor is started to enable the movable shell to move to the proper position, the electric push rod is started to enable the connecting block and the guide base to make contact with the top of the dairy cow, and then the third motor and the second motors are started to enable the movable shell to move to the proper position. The flexible rule is completely attached to the chest or belly of the dairy cow, the camera is used for conveniently shooting the size of the wound flexible rule, the controller is used for conveniently watching the shooting content of the camera, the chest circumference or belly circumference of the dairy cow can be conveniently mastered, measurement of the chest circumference or belly circumference of the dairy cow is completed, operation is simpler and more convenient, and the working efficiency is improved. And the measurement speed of the chest circumference or the abdominal circumference of the dairy cow is improved.

This utility model relates to the field of microcrack detection technology and discloses a high-pressure vessel microcrack detection device based on time-series data aggregation analysis. The device includes a support ring with three connecting blocks extending outwards at equal intervals. Each connecting block has a support rod connected to its end. A telescopic rod is mounted on the support rod, and an adjustment knob is located between the telescopic rod and the support rod. A magnetic strip is connected to the lower end of the telescopic rod. A torque block is installed in a threaded hole, and a limit block is located at the lower end of the torque block. A spring connects the limit block and the support ring, and a cylindrical head is located at the lower end of the limit block. A probe is mounted on the cylindrical head, and a transmission line is connected to the probe. Through the combined use of the support ring, torque block, and specific fixing device, the detection personnel can accurately control the applied stress during the detection process, improving the accuracy of the measurement data, reducing the number of measurements, and accelerating the measurement speed.

The application provides a laser beam optical axis eccentricity and inclination testing method and device, wherein the method comprises: starting a target laser, making the outgoing beam along a laser output channel, and reaching a measuring mechanism, wherein the measuring mechanism is coaxially installed with the laser output channel; after a preset time length, collecting temperature change data at different positions of the measuring mechanism through a plurality of temperature sensors arranged at different positions of the measuring mechanism; and determining the eccentricity and the inclination angle of the outgoing beam based on all the temperature change data. The eccentricity of the beam is calculated through the different temperature rises of the measuring mechanism at different positions after the beam is deflected. The method can measure lasers of various types including Gaussian beams and uniform energy beams. For the eccentricity of a large-size laser beam, only the beam receiving structure needs to be replaced for measurement, and the method is universal. The method can directly test a high-power laser beam without filtering, and does not need to consider the error caused by wavefront deformation in the filtering process, and does not need complex optical path adjustment, and the measurement speed is fast.

The application discloses a free-form surface adaptive measurement device and method based on Fourier spot analysis, in particular to a free-form surface adaptive zero-position interferometer device for large surface shape deviation, and belongs to the field of optical detection. The device comprises a light source system, an adaptive compensation system, an interference system and a surface to be measured. The liquid crystal spatial light modulator is used for guiding aberration compensation of the adaptive element through analysis of Fourier transform spots of the system, and the dependence on an interference pattern is broken, so that the measurement range of the traditional adaptive interferometer is greatly expanded, and destructive modification of a traditional interferometer light path is not needed.

An analytical device for detecting multiple types of samples is disclosed. It can perform dry chemical analysis on a first type of sample using a first type of test strip and on a second type of sample using a second type of test strip. The device is configured with a first detection mode and a second detection mode. In the first detection mode, a transmission mechanism transmits the first type of test strip it carries in a first operating cycle. In the second detection mode, the transmission mechanism transmits the second type of test strip it carries in a second operating cycle. The first and second operating cycles are different. This analytical device is compatible with different types of samples and offers different detection modes for adaptation, thereby improving measurement speed.

The application relates to the technical field of semiconductor package detection, and relates to a chip size measurement method and system based on multi-station parallel cooperation, which comprises the following steps: confirming a DB (Die Bonding) product, obtaining a suction platform and a high-resolution camera, confirming a plurality of chip center coordinates based on a plurality of product images, confirming a to-be-detected chip based on the chip center coordinates and the to-be-detected DB product, performing thickness measurement on the to-be-detected chip to obtain a chip thickness measurement result, performing offset detection on the to-be-detected chip to obtain an X-axis offset amount, a Y-axis offset amount and a chip angle deviation, performing appearance detection on the to-be-detected chip to obtain a defect area proportion, combining the chip thickness measurement result, the X-axis offset amount, the Y-axis offset amount, the chip angle deviation and the defect area proportion to obtain chip size measurement data, and collecting the chip size measurement data to obtain a plurality of chip size measurement data, thereby completing chip size measurement. The application can improve the measurement speed of chip size measurement.

The application relates to an electromagnetic wave vector distribution measuring system based on laser ionized air. The design generates plasma by laser ionizing air, the generated plasma interacts with the electromagnetic wave to be measured, the spatial position of the laser ionized air is adjusted by using a light source control system, electromagnetic wave signals after the plasma at different positions interacts with the electromagnetic wave to be measured are received, and the measurement of the amplitude and phase distribution of the electromagnetic wave at any position in space is realized. The application can not only realize the rapid measurement of the spatial electromagnetic wave distribution, but also avoid the influence of other fixtures, measuring media and the like on the electromagnetic wave distribution at the measured position, so that the application is a kind of rapid, flexible and accurate measurement means.