20 results about "Nephelometer" patented technology

The invention discloses a water turbidity detection method and device, and aims to solve the problems that a photoelectric sensor of an existing portable water turbidity meter is usually made of a semiconductor material, has photosensitivity, has dark current, is sensitive to external environment light and has large test errors. Respectively recording the output frequencies f0 and f1 of the high-precision QCM sensor when the light beam passes through the standard water body of the standard sample tube and the water body to be detected of the detected sample tube and then irradiates the high-precision QCM sensor, then converting the output frequencies f0 and f1 into corresponding illumination intensities I1 and I2, and finally obtaining a turbidity value S according to a turbidity value calculation formula. The sampled QCM sensor does not generate dark current and is not easily influenced by external environment light, so that the problem that the detection precision is influenced due to the fact that a photoelectric sensor based on a PN junction is sensitive to the external environment light is solved. The frequency (time) is a physical quantity with the highest test precision at present, and the method has higher precision.

Provided is a turbidity meter including a main body, a fluid container which is formed inside the main body and in which a fluid is accommodatable, a fluid inlet pipe which is connected to the fluid container and via which the fluid is supplied to the fluid container, a fluid outlet pipe which is connected to the fluid container and via which the fluid is discharged from the fluid container to the outside, a wave source configured to irradiate waves toward the fluid container, a detector configured to detect a laser speckle at every time point set in advance, the laser speckle being generated due to multiple scattering of the irradiated waves in the fluid, and a controller configured to estimate the presence or absence of impurities in the fluid in real-time by using the detected laser speckle.

The invention discloses an optical titration end point judgment method, which comprises the following steps: detecting the turbidity of different water sources by using a turbidity detector to obtain N * I data groups related to actual absorbance, water source turbidity and incident light wavelength; constructing a prediction model for predicting absorbance compensation in the titration process based on turbidity; collecting a to-be-detected water source, detecting the turbidity of the to-be-detected water source by using the turbidity detector, and calculating the absorbance of the to-be-detected water source under the incident light conditions of different titration moments and different wavelengths; outputting absorbance compensation under the condition of incident light with different wavelengths, and correcting the absorbance of the water source to be detected; and drawing an absorbance-titrant volume relation curve under different wavelength conditions, and taking an average value of jump points in the absorbance-titrant volume relation curve to obtain a titration end point when the water source to be detected is subjected to water quality detection. The problem that a single-wavelength optical signal is susceptible to turbidity interference is solved, and the defects that traditional titration inflection point detection is sensitive to noise and has judgment errors are overcome.

A control apparatus includes a controller configured to measure turbidity based on received light waveforms of light received through a liquid to be measured, acquire waveform data indicating a received light waveform of light received when the measured turbidity rises above a threshold, execute, using the acquired waveform data as input, an identification process for identifying a type of substance mixed in the liquid to be measured to thereby acquire an identification result of the type of substance, and determine the type of substance with reference to the acquired identification result.

1. The name of the design product: low-range turbidity analyzer (I). 2. The use of the design product: for water turbidity monitoring in scenarios such as waterworks, municipal pipelines, industrial processes, etc. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention provides a surface scattering type turbidimeter and a turbidity measuring method, which change the position relation between the light irradiation position of the liquid surface and a light receiving element to improve the accuracy of turbidity measurement. The measurement tank stores a liquid to be measured. The light source emits light to the liquid surface of the liquid to be measured stored in the measuring tank. The light receiving element receives scattered light generated in the measurement tank by light from the light source. The changing mechanism changes the irradiation position of the light from the light source on the liquid surface and the relative position of the component of the light receiving element with respect to the traveling direction of the light, said component being horizontal to the liquid surface. The turbidity value calculation unit calculates the turbidity value of the liquid to be measured on the basis of the scattered light received by the light receiving element.

An inexpensive, yet accurate particle matter (e.g., PM) detector is described that combines the features of two different optical particle sensors with a modeling tool to provide a comprehensive, effective air quality measurement instrument (e.g., sensing instrument). The modeling tool enables the use of a combination low cost optical particle sensors, such as a nephelometer and an optical particle counter to determine the amounts of unhealthy particles that are present in air. The sensing instrument determines the total mass loading at specific size breakpoints, such as PM1, PM2.5, and PM10. In some embodiments, the sensing instrument may include gas sensors so that the particular gaseous pollutants can be identified and measured. In some embodiments, the sensing instrument may further include one or more of a humidity sensor, a temperature sensor, and a pressure sensor.

The utility model provides a turbidimeter based on a fisheye lens, and belongs to the technical field of turbidimeters. A measuring assembly and a debugging seat are sequentially inserted in an equipment box from front to back, and a battery, a gray scale plate, a calculation scale and a debugging rod are inserted in one side of the debugging seat. The device is reasonable in structure, the detection hydraulic machine drives the detection hydraulic rod to ascend and descend, the detection motor drives the detection shaft to rotate, the detection hydraulic machine and the detection motor enable the detection assembly to adjust the height and the direction, adjustment is carried out in different environments, and the influence of environmental stray light on measurement results is further reduced. The fisheye lens is used for collecting images and the camera is used for imaging, the images are transmitted into the turbidimeter and the detector for detection through the wire, and the characteristic that the energy and polarization state of the incident light are changed due to interaction of the aerosol particles and the incident light is called as the scattering characteristic of the aerosol particles. And the research and detection results of the scattering characteristics can promote the fields of weather observation and the like.

The utility model discloses a water quality on-line monitoring comprehensive device, which belongs to the technical field of water resource monitoring and monitors related water quality state data information in a water body in real time through an electrochemical sensor, a glass electrode pH sensor, a photometer, an ion chromatograph, a light scattering turbidimeter and a time recorder, the related water quality state data information comprises the dissolved oxygen concentration, the pH value, the chloride concentration, the nitrate concentration, the turbidity and the ammonia nitrogen density in the actually measured water body; related water quality state data information in the water body is monitored in real time, timely and accurate monitoring feedback can be provided, continuous mastering of the environment state is ensured through the real-time performance, and emergencies are effectively prevented; the preprocessing process enables data to be more standardized, and higher accuracy and reliability are provided for subsequent water quality state analysis and prediction.

To provide a surface-scattering type turbidimeter and turbidity measuring method that improve the accuracy of turbidity measurement by changing the positional relationship between the light irradiation position on the liquid surface and the light-receiving element.SOLUTION: A measurement tank stores the liquid to be measured. A light source irradiates the surface of the liquid stored in the measurement tank with light. A light-receiving element receives scattered light generated in the measurement tank by the light emitted from the light source. A changing mechanism changes the relative position, with respect to the horizontal component of the light traveling direction at the liquid surface, between the irradiation position of the light from the light source on the liquid surface and the light-receiving element. A turbidity value calculation unit calculates the turbidity value of the liquid to be measured on the basis of the scattered light received by the light-receiving element.SELECTED DRAWING: Figure 1

This invention discloses a method for determining the endpoint of optical titration, comprising: using a turbidity detector to detect the turbidity of different water sources, and obtaining... N × I This study uses a dataset of actual absorbance, water source turbidity, and incident light wavelength. A predictive model based on absorbance compensation during the turbidity-predictive titration process is constructed. Water samples are collected from the test water source, and its turbidity is detected using a turbidity meter. The absorbance of the test water source under different titration times and incident light wavelengths is calculated. Absorbance compensation under different wavelengths of incident light is output to correct the absorbance of the test water source. Absorbance-titer volume relationship curves under different wavelengths are plotted, and the average value of the jump points in the absorbance-titer volume relationship curves is taken to obtain the titration endpoint for water quality testing. This method solves the problem of single-wavelength optical signals being easily interfered with by turbidity and avoids the defects of traditional titration inflection point detection, such as sensitivity to noise and judgment errors.

The invention provides a water quality turbidity measuring device and method, and belongs to the field of water quality detection.The measuring device comprises an umbilical tube, a camera, an artificial light source and a shade guide and is used for measuring turbidity and correcting color cast of an underwater image based on the white balance theory after the transmissivity is calculated. The measuring method comprises the following steps: the measuring device acquires a reference image and an underwater image, and respectively calculates the average brightness of a white block area; and calculating the water turbidity based on the average brightness of the white block area. The device disclosed by the invention does not need to use an additional turbidimeter, is adaptive to various navigation equipment and use scenes, and realizes efficient and convenient measurement of the water turbidity.

The utility model relates to the technical field of alum flower concentration on -line monitoring, especially based on ultrasonic's alum flower concentration on -line monitoring equipment, including sedimentation tank, the top of sedimentation tank and along four edges all are fixed with side board, the top of side board located in front and back two sides all are installed with fixed support, the top of fixed support located in front side installs the slide rail that extends along the length direction, the outside slide of slide rail is connected with sliding seat, in the utility model, both sides of the sedimentation tank are provided with fixed stand, under the action of positive and negative motor drive rotating screw and screw sleeve thread cooperation, make the folding support move down, guarantee that the contact sensing probe is in the pool, the contact sensing probe adopts turbidimeter probe, emits infrared light to pass through the water body, detects alum flower suspended particle concentration through 90 degree scattering angle, the structure of having and not having contact combination can greatly improve the monitoring effect of alum flower concentration.

The invention provides a solution turbidity calculation method, a solution turbidity detection system and a solution turbidity detection device, and belongs to the technical field of solution turbidity detection. The solution turbidity calculation method comprises the following steps: calculating solution concentration according to infrared incident light intensity and infrared transmitted light intensity of infrared light of a solution to be detected; according to the solution concentration and each color of the to-be-detected solution, calculating each corresponding color concentration component; calculating a total color concentration according to each color concentration component; and calculating the turbidity of the solution according to the total color concentration, the light intensity of the infrared incident light and the light intensity of the infrared transmitted light. According to the solution turbidity calculation method, the detection system and the turbidity detection device, the turbidity detection accuracy can be improved.

Systems and methods are provided for using an additively manufactured vehicle, such as an UUV, with additively manufactured modules. The vehicle may be configurable such that additively manufactured modules or components may be detachably connected to the vehicle by hand, without the use of tools. Such modules may include connectors adapted to securely attach additional modules that may be detached by hand, without the use of tools. The additively manufactured modules may include ball bearings for rotating modules such as propellers and thrusters, and clips or tabs for detachable connection. The modules may include optical components for communications between a swarm of unmanned vehicles. Such optical modules for underwater vehicles may utilize nephelometry and / or turbidimetry to improve communications parameters based on scattered light measurements.

The application discloses a solubility and solid content measuring device, system and method based on online turbidity, the measuring device comprises a stirrer, a container for containing a to-be-measured substance and a coupled measuring device configured to simultaneously measure the turbidity and temperature of the to-be-measured substance, the stirrer is configured to stir the to-be-measured substance, the coupled measuring device comprises a turbidimeter and a temperature detector, the turbidimeter comprises a probe shell made of a heat-conducting material, and the temperature detector is arranged on the inner wall of the probe shell; the stirring axis of the stirrer is configured to be arranged perpendicularly to the liquid surface of the to-be-measured substance, the turbidimeter is arranged at a certain angle with the stirrer, the probe shell of the turbidimeter is provided with a glass window for emitting light and receiving light, and the glass window is arranged on the probe shell away from the stirrer. The application can reduce the influence of the stirrer and external light on turbidity determination, and improve the measurement accuracy and measurement efficiency of solubility and solid content.

A measurement tank stores a liquid to be measured. A light source emits light to a liquid surface of the liquid to be measured stored in the measurement tank. A light receiving element receives scattered light generated at the measurement tank from the light from the light source. A change mechanism changes a relative position in relation to a component horizontal to the liquid surface in a direction of travel of the light, the relative position being between: an irradiation position where the light from the light source is emitted to on the liquid surface; and the light receiving element. A turbidity value calculation unit calculates a turbidity value of the liquid to be measured, on the basis of the scattered light received by the light receiving element.

The invention discloses an aerosol liquid water content inversion method and system. By coupling the Mie scattering theory and the immune evolution algorithm, the accurate inversion of the moisture absorption growth factor of the aerosol particle size is realized by utilizing hourly observation data of a turbidimeter, a black carbon instrument and an environmental particulate matter analyzer and simultaneous secondary atmospheric visibility, relative humidity and nitrogen dioxide monitoring data; and then an aerosol liquid water content calculation model with clear physical significance is established. The method effectively overcomes the limitations that a traditional thermodynamic model ignores organic components, a chemical component method is limited in applicability and an instrument direct measurement method is high in cost, complex in operation and the like, and has the outstanding advantages of being rigorous in theoretical basis, high in universality, low in parameter sensitivity and the like. The implementation of the invention provides a reliable technical means for the research on the moisture absorption characteristic of the aerosol in the haze weather process, and lays a foundation for the subsequent in-depth research of the aerosol moisture absorption haze-causing mechanism.

The application relates to an antibody turbidity detection method, device, system, computer equipment, storage medium and computer program product, real-time acquisition of a transmission signal and a scattering signal after a light source irradiates a turbidimetric measurement container, the turbidimetric measurement container stores a to-be-measured liquid; a turbidity calculation function of the to-be-measured liquid is determined according to the transmission signal; and antibody turbidity of the to-be-measured liquid is determined according to the turbidity calculation function and the latest scattering signal. In the whole process, the turbidity interval is preliminarily estimated based on the transmission signal, the appropriate turbidity calculation function is determined, and then the turbidity calculation function and the scattering signal are used to detect the antibody turbidity, which can overcome the defect that the antibody turbidity is too high to cause false negatives, and accurate antibody turbidity detection is realized.

A method for determining airborne concentrations of an ensemble of particulate matter below the size fraction 2.5 μm in aerodynamic diameter (PM2.5). The method is to be composed of a sharp cut PM2.5 cyclone, optical sensor capable of producing scattering coefficients dependent on particle size, temperature and humidity sensors for adapting to changes in the environment, and a processing system for applying logic-based algorithm to convert raw sensor values into PM concentrations. The optical sensor is a dual wavelength integrating nephelometer capable of yielding particle characteristic scattering coefficients at two wavelengths. The particle scattering ratios between two wavelengths are used in conjunction with temperature and humidity in the method's algorithm to reduce particle growth bias and to ultimately yield PM2.5 concentrations.