149results about "Transmissivity measurements" patented technology

The application discloses a portable water quality turbidity detection device, and aims at the problems of photosensitivity, existence of dark current, larger test error, higher use cost and sampling of weak voltage signal by the circuit in the existing portable water quality turbidity meter. The incident light generated by the light source generating circuit is evenly divided into two paths by a 1 / 2 splitter, and then is transmitted into standard water and measured water respectively. The current signals are converted into voltage signals by photoelectric detectors and current-voltage converters respectively, and are connected to the voltage control end of a high-precision voltage-controlled crystal oscillator through an alternative switch. The high-precision voltage-controlled crystal oscillator is used for frequency conversion, and then the standard water frequency and the measured water frequency are measured by a signal frequency measurement module. Then, the turbidity of the measured water is calculated by a data processing module, and is output to a display circuit for display. The application eliminates the influence of the dark current and is not easily affected by the external environment light, has higher precision, avoids the sampling circuit with higher use cost for sampling of weak voltage signals, and can obtain the turbidity of the measured water in real time.

A wastewater testing apparatus and a cleaning device. The wastewater testing apparatus includes: a housing provided therein with an accommodating cavity, where the housing is provided thereon with a water inlet, a water outlet, and a wire hole which are communicated with the accommodating cavity; a testing tub arranged in the accommodating cavity, where two ends of the testing tube are respectively communicated with the water inlet and the water outlet; and a testing assembly arranged in the accommodating cavity, where the testing assembly includes a transmitter, a receiver, a circuit board connected to the transmitter and the receiver, and a wire harness connected to the circuit board, the transmitter and the receiver are arranged opposite to each other on two sides of the testing tube, and the wire harness extends to the outside of the housing by means of the wire hole.

This application provides a data monitoring and analysis method and system for a plasma separator, applied in the field of medical data analysis technology. It monitors the real-time operating parameters of the plasma separator during whole blood processing and identifies abnormal states during the separation process based on the fluctuation characteristics of these parameters. Simultaneously, it acquires the red blood cell residue detection value of the plasma sample. Based on this, the representativeness of the red blood cell residue detection value is evaluated according to the abnormal state information, and a corresponding reliability index is determined. Finally, the detection value and the reliability index are combined to generate a quality assessment result for the current batch of plasma. This method deeply integrates the equipment operating status with the plasma quality detection results, effectively solving the problem in existing technologies where single sampling point detection results may lead to false negatives or false positives due to the inhomogeneity within the plasma batch, significantly improving the accuracy and reliability of plasma quality assessment.

The application relates to the technical field of atmospheric detection, and particularly provides a device and a method for measuring atmospheric transmittance, the device comprising a sensing and executing layer and a supporting layer, wherein the sensing and executing layer comprises a long-distance subsystem, a short-distance subsystem and a meteorological detection device; the distance between the long-distance subsystem and a measurement target is equal to a to-be-measured distance of the atmospheric transmittance; the distance between the long-distance subsystem and the measurement target is greater than the distance between the short-distance subsystem and the measurement target; the long-distance subsystem and the short-distance subsystem both comprise a multi-spectrum device; the multi-spectrum device of the long-distance subsystem collects a first multi-spectrum radiation image of the measurement target; at the same time, the multi-spectrum device of the short-distance subsystem collects a second multi-spectrum image of the measurement target; the atmospheric transmittance is calculated based on the radiation path difference of the first and second multi-spectrum radiation images; and the meteorological detection device is used for collecting meteorological data of a measurement environment, and the meteorological data is used for compensating for the environmental error of the atmospheric transmittance.

This invention relates to the field of household goods testing technology and discloses an automatic household goods testing instrument, including a housing. A replacement mechanism is located on the right side of the housing's interior. The replacement mechanism includes two turntables. The opposite sides of the two turntables are rotatably connected to the front and rear ends of the right side of the inner wall of the housing, respectively. A common connecting rod is fixedly connected between adjacent middle sections of the two turntables. Multiple gears are rotatably connected to the rear side of the front turntable. Friction rollers are fixedly connected to the rear ends of each gear, and the rear ends of each friction roller are rotatably connected to the front end of the rear turntable. The output of a servo motor drives the front turntable to rotate, ensuring that the gear of the friction roller for the target material aligns with and meshes with the gear. The drive motor starts, causing the friction roller to rotate and contact the sample for friction. This simulates various material friction contact scenarios as needed, and the test results closely resemble actual usage conditions.

The application relates to the field of container detection, in particular to a plastic medical container detection device. The plastic medical container detection device is characterized in that an upper cover and a lower cover form a closed space, a lamp body irradiates light on the medicine in the plastic medical container, a light sensor on the mounting rod is immersed in the medicine to detect the light penetrating through the plastic medical container, a first heater and a second heater are arranged to heat the plastic medical container and the medicine in the plastic medical container to a specified temperature, the light detection work of the plastic medical container is carried out at different temperatures and at multiple angles, and whether the temperature change has a great influence on the light shielding performance of the plastic medical container is observed. The technical problems that the existing light shielding performance detection device cannot simultaneously detect the plastic medical container at multiple angles and cannot simulate the detection work in combination with the environmental change are solved.

An ozone concentration measurement device (100) for measuring an ozone concentration of measurement target gas in a container (8) includes: a photoelectric sensor (4) in which a light emission section (2) for emitting light, a light reception section (3) for receiving the light, and a signal processing section (1) for transmitting a light emission signal to the light emission section (2) and receiving a light reception signal from the light reception section (3), are integrally formed; a light-emission optical fiber (5) which is connected to the light emission section (2) and introduces the light into the container; a light-reception optical fiber (6) which leads out the light having passed through inside of the container (8), to the light reception section (3); and a calculation section (9) which calculates the ozone concentration of the measurement target gas on the basis of the light reception signal from the signal processing section (1).

The application relates to the technical field of optical detection equipment, and discloses a device and a processing method for testing the laser damage threshold of a sample, which can quickly and accurately lock the spot size when damage occurs. The method comprises the following steps: converting a received laser signal that has passed through a measured sample into an electrical signal output by means of a photoelectric detection module; amplifying the electrical signal output by the photoelectric detection module by means of a signal amplification module; performing peak detection and smoothing processing on the voltage signal output by the signal amplification module by means of a peak detection module to obtain a voltage signal representing the peak intensity of laser; outputting a high-level signal when the voltage signal output by the peak detection module is higher than a reference voltage by means of a voltage comparator configured in a same direction comparison mode in a voltage comparison module; and cutting off the power supply circuit of the motor to lock the spot size corresponding to the moment of power mutation by means of a lock module comprising a MOS tube connected in series in a motor on-off control circuit when the voltage comparator outputs a high-level signal.

The present invention aims to provide a low-cost NDIR greenhouse gas monitoring device that combines a rotary multi-gas cell system and an NDIR sensor system for measuring nitrous oxide (N2O) gas at multiple locations in a short time. [Solution] The NDIR greenhouse gas monitoring device is characterized by comprising a rotary multiple gas cell system having two or more gas cells, gas cell holders that fix both ends of each gas cell, a central axis that serves as the axis of rotation of the gas cell holder, and a motor connected to the central axis that rotates the gas cell holder by rotating the central axis, and an NDIR sensor system having an NDIR light source unit, an NDIR detector unit, and a controller that controls the output of the motor that rotates the central axis in the rotary multiple gas cell system.

A method and apparatus for determining the optical density of a solution is disclosed. A flow cell 1 is provided (100) having at least three optical paths 4a, 4b, 4c, each having a predetermined path length l. Absorbance readings A of the solution are read (400) in the at least three optical paths 4a, 4b, 4c. For each pair of optical paths, a slope αc is calculated (500) by dividing the difference in absorbance readings ΔA by the difference in path length Δl. The calculated slopes αc are compared (600), and (a) if the calculated slopes αc are the same, the slopes are used to determine the optical density of the solution (700), or (b) if the calculated slopes αc are not the same, the steepest of the calculated slopes is used to determine the optical density of the solution (701a), or the calculated slopes that are in the range of 0.01 to 2 absorbance readings are used to determine the optical density of the solution (701b).

The application provides a knitted fabric missing yarn detection system and method based on multispectral imaging, wherein the detection method comprises the following steps: projecting ultraviolet and near-infrared band light on the knitted fabric; collecting a visible fluorescence image of the fabric under ultraviolet band irradiation and a near-infrared perspective image of the fabric under near-infrared band irradiation; extracting a spandex light-emitting skeleton in the visible fluorescence image, and performing primary missing yarn discrimination in combination with the background characteristics of cotton yarn in the near-infrared perspective image; extracting topological deformation parameters of cotton yarn loops in the near-infrared perspective image, identifying the current tension state of the fabric, and generating a threshold compensation coefficient; using the threshold compensation coefficient to dynamically adjust the light-emitting judgment reference threshold used for missing yarn discrimination; and using the adjusted reference threshold to check the primary missing yarn alarm and output the final detection result. The scheme effectively avoids the false judgment of normal yarns that are thinned under high tension as missing yarns.

This provides a protective cover suitable for optical gas sensors mounted on a circuit board. [Solution] A protective cover (20) having a box-shaped wall with one side open is provided to cover an optical gas sensor (10) which is mounted on a substrate (6) and comprises a housing body (11) having a cavity (13) into which the gas to be detected is introduced and gas intake ports (111, 112) communicating with the cavity, and a light source and a light receiving unit (4) arranged opposite each other on either side of the cavity, and the light receiving unit receives light emitted from the light source and detects the gas concentration in the cavity based on the detection signal, wherein an opening (21A) is formed in at least a part of the wall, a filter is provided in the opening, and at least a pair of locking pieces (22) are provided on the opening edge of the one side which are locked to a locking part (6a) provided on the substrate.

This invention discloses an alcohol detection chip and detection method based on a cascaded dual-ring resonator with dual-gradient curvature, belonging to the field of optical micro-nano sensing and integrated optics technology. This invention aims to solve the technical problems of low sensitivity, poor resolution, complex spectral analysis, and weak environmental adaptability in traditional micro-ring sensing devices, as well as the low detection accuracy of existing miniaturized equipment. The chip uses a silicon-based substrate and includes input and output waveguides, cascaded dual micro-rings, a coupling region, and two sets of miniature heating electrodes. The micro-rings employ dual-gradient waveguides with circular and Euler-circular curved structures for the inner and outer curves, respectively. The cascaded dual rings create a vernier effect, broadening the free spectral range. By adjusting the resonant wavelength through the heating electrodes, scanning detection is completed in the characteristic alcohol band around 1400nm, and high-precision alcohol measurement is achieved by combining transmission spectroscopy. This invention has a compact structure and low cost, and is suitable for rapid quantitative detection of alcohol in industrial monitoring, vehicle safety, food safety, and other scenarios.

This application relates to a detection system and method for liquid level identification. The detection system includes: a light-emitting end, a receiving end, a clamping and driving mechanism, and a control unit. The clamping and driving mechanism is used to clamp a container containing multiple layers of media and can drive the container through the detection optical path between the light-emitting end and the receiving end. The light-emitting end emits at least one detection light, the wavelength of which has different transmittance for different media in the multiple layers. The receiving end converts the received detection light into an electrical signal and outputs it to the control unit. The control unit receives the electrical signal and, based on the signal characteristics of the electrical signal, identifies the interfaces of the multiple layers of media within the container and the liquid level information at the bottom of the media. This method enables efficient and accurate non-contact identification of the interfaces of multiple layers of media.

The application discloses a reflective terahertz metasurface sensor, a biochemical detection system and application, and the sensor comprises a resonance unit with a preset period length, and the resonance unit comprises, from top to bottom, a first gold layer, a first chromium layer, a polyimide material layer, a second gold layer, a second chromium layer and a silicon dioxide material layer; wherein the width and length of the first gold layer have a preset ratio, the first gold layer and the second gold layer have a first preset thickness, and the polyimide material layer has a second preset thickness, and the application has the advantages of improved detection precision, effective differential detection of trace biochemical samples and the like.

The utility model relates to clothing detection technical field, and disclose a kind of clothing anti-UV performance detection light shield structure, including side plate, further include: placing plate, rotating connection on side plate by hinge, the detection cover that the clothing exposure is irradiated by ultraviolet on placing plate is installed;The utility model utilizes pressing plate and limits clothing to be pressed flat, and the anti-UV performance detection processing of clothing can be handled using detection equipment by detection cover, side plate and placing plate effectively block other light source (such as illuminating lamp, natural light etc.), avoid them and ultraviolet light source superposition, lead to detection equipment (such as ultraviolet spectrophotometer) reading inaccuracy, and can block the ultraviolet that has not been absorbed by clothing, avoid its direct irradiation to detection equipment or laboratory other area, reduce the risk of equipment due to long-term exposure to ultraviolet and ageing.

The invention relates to a system for determining cellular respiration and nutrient metabolism of living cells or tissues, the system comprising: a cell container configured to receive and maintain a biological sample; a gas volume in fluid communication with the cell container, the gas volume containing gaseous components produced by metabolic activity of the biological sample; an optical detection unit configured to detect a target gas species in the gas volume by wavelength-selective absorption spectroscopy, the optical detection unit being further configured to distinguish between different isotopic species of the target gas species, the optical detection unit comprising an illumination source and detector arrangement optically coupled to the optical detection unit and configured for measurement of absorption signals corresponding to different isotopes of the target gas species; and an electronic control and evaluation unit operatively connected to the optical detection unit, the electronic control and evaluation unit being configured to acquire and process absorption data, determine absolute values and / or temporal variations of the target gas species concentration and isotopic composition, and output respiration-related parameters of the biological sample. In this way, a system is provided that enables precise and efficient determination of carbon dioxide produced by living cells or tissues under physiological conditions.

This invention proposes a hydraulic component contamination tolerance testing device, comprising: a testing cylinder, a stirring assembly, and a sealing assembly. A testing tube is fixedly connected to the bottom of the testing cylinder. A light-emitting element and a photosensitive element are respectively arranged on both sides of the testing tube. The stirring assembly includes a hollow tube rotatably mounted on the top of the testing cylinder and a driving assembly for driving the hollow tube to rotate. Stirring blades are fixedly connected to the surface of the hollow tube, and scraper frames are fixedly connected to both sides of the hollow tube. The sealing assembly includes a connecting rod that movably penetrates the hollow tube and a lifting assembly for driving the connecting rod to rise and fall. A sealing plate is fixedly connected to the lower end of the connecting rod. This invention, by setting up the stirring assembly, ensures uniform distribution of contaminant particles in the oil, improving the reliability of the test results. The scraper frames clean the inner wall of the testing cylinder, preventing oil residue from affecting subsequent use.

The application discloses a kind of new material optical lens production appearance detection equipment, it is related to optical lens technical field, the present application, including base, the upper surface of the base is fixedly connected with support plate, the surface of the support plate is fixedly connected with detection table, the top of the support plate is fixedly connected with top frame, the inner surface of the top frame is rotatably connected with rotary frame, the lower portion of the rotary frame is provided with optical detector, the inboard of the rotary frame is provided with infrared emitter, by infrared emitter and optical detector cooperation, the transmittance of lens can be detected, guarantee the quality and utility of optical lens, rotary frame drives optical detector circumferential rotation, so that it can be moved to different directions of lens, transmittance detection is carried out to different angles, improve the comprehensiveness of detection, promote detection accuracy, sliding seat and limit plate drive infrared emitter rotation, expand its adjustment range, further improve the comprehensiveness of detection.

This invention discloses a method for fabricating an in-fiber microfluidic sensing structure based on a grapefruit-shaped microstructured optical fiber, belonging to the field of optical fiber sensing technology. The sensing structure consists of a micro / nano fiber structure (1) obtained by tapering and cutting a single-mode fiber, a grapefruit-shaped microstructured optical fiber (2), and a micro / nano fiber structure (3). The single-mode fiber is tapered by arc discharge on an LDS2.5 fiber microfabrication platform. After tapering, it is cut at the middle of the tapered waist to obtain two micro / nano fiber structures. Finally, the two ends of the grapefruit-shaped microstructured optical fiber are fused to the micro / nano fiber structures. Liquid samples can flow into the grapefruit-shaped microstructured optical fiber through the air holes on the fused end face, thereby avoiding the use of complex femtosecond laser drilling methods to construct the inlet and outlet ports, significantly reducing the fabrication cost and difficulty of the in-fiber microfluidic sensing structure. At the same time, the unique geometric structure of the grapefruit-shaped microstructured optical fiber can not only transmit optical signals, but also provide a natural channel for loading microfluidic samples, further simplifying biochemical analysis operations and realizing a miniaturized optofluidic platform.

The present application relates to a kind of silica gel light transmittance online detection calibration device and method, and it is related to the technical field of silica gel product production;Including bottom plate, support frame is set on bottom plate, and the length direction one end of support frame is provided with detection box one by support leg, and detection box one is provided with the individualized light transmittance detection of multiple silica gel particles in the first level detection equipment of quantity sample.It includes the load platform of horizontal setting in the inside of detection box one, and detection unit one for detecting silica gel is installed on the support frame above detection box one.The present application can solve the following problems in the process of the light transmittance detection of silica gel in prior art: by designing first level detection to provide high-precision reference, for calibrating the deviation of overall measurement;Second level detection is then quickly detected after a large number of particles are collected, for screening batch uniformity, by the data comparison fusion of two modes, the problem of low confidence or poor stability of single detection mode is solved.

There is a need for technology that can eliminate the influence of air bubbles from measurement results and accurately determine the level of cleanliness. [Solution] A cleaning device for cleaning containers, comprising: a storage section for accommodating containers; a nozzle for discharging cleaning liquid to containers accommodating the storage section; a drainage channel for draining the cleaning liquid discharged to the containers; a cleaning liquid measuring section for measuring the absorbance of the cleaning liquid drained from the drainage channel; and a control device, wherein the control device performs a first determination step of determining whether or not the cleaning liquid contains air bubbles based on the absorbance; and a second determination step of determining whether or not the cleaning liquid is clean based on the absorbance of the cleaning liquid that was determined not to contain air bubbles in the first determination step.

To improve work efficiency during manufacturing and maintain good sensitivity over the long term. [Solution] The infrared gas analyzer detector (20) comprises first to third infrared transmitting windows (21 to 23) that transmit infrared rays, a front gas chamber forming body (27) to which the infrared transmitting windows are joined to form first and second gas chambers (31, 32), and a sensor unit (60) housed in a containment space (62) communicating with each gas chamber to detect the concentration of the gas to be measured. The gas chamber forming body comprises a frame (81 to 83) to which the first to third infrared transmitting windows are joined, and a main body (34) that forms each gas chamber and to which the first to third frame (34) is joined. The infrared transmitting windows and the frame are joined at room temperature via metal layers (86, 88) formed in the joining regions of each.

Devices and methods for determining analytes in biological samples are disclosed. A device includes a motor to rotate a disc having one or more wells at a common radius. Each well contains one or more reagents and is configured to receive an aliquot of a fluid comprising one or more components of a biological sample. The device also includes one or more illumination sources and one or more detectors. During a detection period while the disc is spinning, each illumination source illuminates each well, and each detector detects one or more optical signals from each well and produces at least one reading for each well per revolution of the disc to facilitate determination of one or more analytes in the biological sample.

The application provides a light-shielding flexible copper-clad plate, a preparation method and application thereof. The light-shielding flexible copper-clad plate comprises a copper foil layer and a polyimide film layer, and further comprises a light-shielding adhesive layer arranged between the copper foil layer and the polyimide film layer. The light-shielding adhesive layer comprises a composite light-shielding filler, the composite light-shielding filler comprises modified flaky light-shielding pigment, carbon black and auxiliary filler, and the weight ratio of the modified flaky light-shielding pigment, the carbon black and the auxiliary filler is (3-6):(2-5):(1-3). The modified flaky light-shielding pigment comprises flaky light-shielding pigment and an inorganic oxide layer coated on the surface of the flaky light-shielding pigment. Based on a ternary composite light-shielding system, the combination of black pigment with a flaky structure and nanoscale carbon black is adopted, and the auxiliary filler is supplemented, so that a multi-dimensional light-shielding network is constructed, thereby realizing high optical density under a lower filler content and ensuring excellent light-shielding effect.

The present invention relates to an apparatus for measuring the flocculation threshold of colloidal media, particularly asphaltenes, by adding an aliphatic solvent, the apparatus comprising: - a measuring unit (10) operating by direct optical transmission and including a measuring chamber (101) for receiving the medium, a light emitter (12) for emitting a light beam entering the measuring chamber in an emission direction, and a photodetector (14) for directly receiving the light beam exiting the measuring chamber and transmitting a current when it receives luminous flux; - a control system comprising a system (17) for driving the light emitter configured to vary the luminous intensity of the emitted light beam between a minimum and a maximum value, and a measuring system (18) for measuring the current transmitted by the photodetector (14), the measuring system (18) comprising: a system configured to receive the current transmitted by the photodetector (14). The system includes a current-to-voltage converter (19) for transmitting voltage, the converter (19) comprising a controlled switch (190) configured to distribute current in a loop selected from at least two impedance loops (191, 192) having different impedances; a variable gain amplifier (20) configured to receive the voltage delivered by the current-to-voltage converter (19) and deliver a voltage equal to or proportional to the input voltage; an analog-to-digital converter (21) configured to receive the voltage delivered by the variable gain amplifier (20) and deliver a digital signal (S) representing the amount of current delivered by the optical receiver; and a management system (22) for a control system (16) configured to control the drive system (17), the switch (19), and the variable gain amplifier (20).

The present application relates to the technical field of catalyst impregnation, and discloses a catalyst excessive impregnation reminding device and a reminding method. The reminding device comprises a circulating pipeline, a detection piece and a reminding piece. The circulating pipeline is used for being connected to a catalyst impregnation equipment, so that an impregnation liquid flows in the circulating pipeline. The detection piece is used for detecting the turbidity degree of the impregnation liquid flowing in the circulating pipeline. When the detection piece detects that the turbidity degree of the impregnation liquid flowing in the circulating pipeline reaches a preset turbidity degree, the reminding piece sends an alarm signal. The reminding device provided by the present application sends an alarm signal when the detection piece detects that the turbidity degree of the impregnation liquid is greater than the preset turbidity degree, so as to remind the staff to perform corresponding operations, avoid the phenomenon of carrier excessive impregnation, and ensure that the performance of the catalyst meets the requirements.

The present application relates to the technical fields of fluid component detection, and discloses a kind of oilfield produced water multi-component online monitoring and characterization system, comprising: fluid flow unit, with contraction section, throat section and diffusion section, utilize flow field shear stress to realize oil droplet particle size homogenization;Polarized irradiation unit is used for projecting monochromatic linearly polarized light;Homotropic transmission detection unit and orthogonal scattering detection unit are used for collecting penetrating light intensity and orthogonal polarization scattering light intensity;Operation processing unit, according to orthogonal polarization scattering signal establishes anisotropic component compensation reference, and deducts the attenuation share generated by suspended solid from transmission signal, obtains oil phase concentration characteristic quantity, the present application utilizes the physical difference of different topography particle depolarization effect to establish component decoupling mechanism, eliminates parasitic interference of irregular suspended solid to oil phase optical response, ensures that oil phase characterization result has high stability.

This invention relates to a sensor for autonomously monitoring sulfur dioxide and carbon dioxide in ship exhaust substances in real time, and to a method for using the same. [Solution] The marine sulfur dioxide emission switching monitoring system 1 is equipped with an emission sampling device 10 that has a built-in power supply and requires little power to operate. The emission sampling device 10 employs highly sensitive and selective chemical sensing technology that can quantify sulfur dioxide and carbon dioxide. In addition to sulfur dioxide and carbon dioxide, relative humidity, temperature, and pressure sensors are used for monitoring exhaust gases. Filters are used to remove solid and liquid aerosolized components from the exhaust of marine engines.

A probe for ongoing liquid analysis, having at least one detector for measuring the spectral properties of the liquid, and a liquid-tight housing for receiving the at least one detector, wherein at least one window is arranged in a wall of the liquid-tight housing, through which the at least one detector detects spectral properties of the liquid, wherein the liquid-tight housing is connected to a flow channel through which the liquid flows. The flow channel is wound.