47 results about "Nephelometer" patented technology

The invention discloses a method for detecting a concentration of nano particles in solution by a nephelometry, which comprises the following steps of: a first step of preparing standard dispersed solution and carrying out ultrasonic dispersion to form uniform standard dispersed solution for later use; a second step of drawing a calibration curve between the concentration of the nano particles and the turbidity, calculating to obtain a standard curvilinear equation, and returning to the first step to restart if the linearity r of the calibration curve is lower than 0.999; and a third step of measuring the concentration of the nano particles in a sample to be measured, placing the sample to be measured into an ultrasonic water bath to carry out ultrasonic dispersion, taking and moving uniformly dispersed solution to be measured into a cuvette cell of a turbidity meter, measuring to obtain a turbidity value of the solution to be measured on a nephelometer by taking a liquid solvent difficult to volatilize as a blank reference, and obtaining the corresponding concentration value of the nano particles according to the calibration curvilinear equation obtained in the second step. The method has the characteristics of strong pertinence, simple, visual and rapid analysis method, capability of field analysis, high precision and accuracy and the like and also serves for enterprises which produce and apply nano materials.

Provided are turbidometers and fluorometers having a unique form-factor to accommodate a number of optical components in a confined geometry. This provides the ability to compensate for change in light intensity from an optical source even in a closed-loop manner. The ability to package reference and signal detectors, along with a relatively large diameter LED light source in a confined geometry is particularly suited for applications requiring small-diameter sensors, such as multi-parameter sonde devices having a total diameter that is in the sub-two inch range.

The invention discloses an automatic continuous multi-stage dilution device for a bacterial suspension and a real-time counting method, and relates to the technical field of microbiological inspection. The device comprises a nephelometer, a vacuum degree sensor, a pipeline cutting piece, an air channel sealing piece and a liquid channel opening piece which are arranged in a closed cavity, wherein a negative pressure pump is connected with the closed cavity through an air channel switch; an air filter is connected with the closed cavity through an air inlet valve; a microcontroller is electrically connected with electrical appliance parts to form an integrated mechanical and electronic device; a liquid inlet pipe of a dilution card is inserted into a bacterial liquid pipe and is arranged in the closed cavity; the nephelometer is used for measuring the initial concentration of the bacterial suspension; the negative pressure pump performs vacuumizing to form negative pressure in the closed cavity and the dilution card, air is sucked, the bacterial suspension automatically enters a dilution pipe and is gradually diluted, a correction curve is established for real-time counting, a result is displayed on a touch screen, and the whole working flow is controlled to operate in a fully-automatic manner through the microcontroller. According to the device and the method, the bacterial suspension can be continuously and automatically diluted and counted in real time. The device and the method are intelligent, quick and convenient, and are applicable to microbiological inspection for food, drugs, hygiene series and the like.

A system is described that provides for the measurement and control of proppant concentration in a liquefied gas fluid stream utilizing a non-nuclear optical detection device such as a near-infrared (NIR), visible (Vis), and ultraviolet (UV) photometer / nephelometer to be used in the fracture treatment of subterranean hydrocarbon formations.

Provided are an optical cavity enhanced turbidimeter and a turbidity measure method. After casting a pulse beam or a beam having a steep intensity gradient into an optical cavity, the turbidity of the inside region of the optical cavity can be calculated using an attenuation rate of an output beam from the optical cavity.

Provided are an optical cavity enhanced turbidimeter and a turbidity measure method. After casting a pulse beam or a beam having a steep intensity gradient into an optical cavity, the turbidity of the inside region of the optical cavity can be calculated using an attenuation rate of an output beam from the optical cavity.

A nephelometer for detecting the concentration of particulates in a sample aerosol is provided with a branched flow path with a sample aerosol input, a clean gas input and an output leading to an optical sensor unit. At least one of the inputs has periodic variable flow so that a concentration-modulated gas stream is supplied to the optical sensor unit. The detector output of the sensor unit is processed in synchrony with the concentration modulation to filter out DC components, such as 1 / f noise and parasitic instrument noise.

The invention discloses the online measuring the oil concentration of the sewage and its equipment. The method adopts the ultrasonic emulsification oil-water mixture and uses the optical nephelo method to test the oil concentration. The equipment comprises the measuring section vertically put on the sewage pipeline, the ultrasonic oscillator set at the input and the output ends of the measuring section; three pairs of white gem windows transmitting beams set at the outside pipe wall, and the windows arrange in 120 Deg angle mutually; three groups of photoelectric converters are set corresponding to the windows; connect the industrial controller with a displayer through the signal receiver and the amplifier. When the sewage flows through the test section, the ultrasonic oscillator emulsificates the sewage and mixes it evenly; the testing beam is the violet beam with fixed wavelength; the photoelectric converter converses the optical signal into the electric signal and the optical nephelometer calculates the oil concentration of the sewage.

The invention is applicable to the field of liquor measurement, and provides a turbidity measuring method. The method includes measuring a refraction parameter of liquor through lighting emission of a light source, and converting the refraction parameter into an electric signal; measuring a scattering parameter under irradiation, and converting the scattering parameter into an electric signal; computing the electric signals converted from the refraction parameter and the scattering parameter by a PLC (programmable logic controller) to obtain a turbidity value of the liquor; displaying the turbidity value. The turbidity measuring method has the advantages that the strengths of transmitting light and scattering light both emitted to water sample beams are measured at the same time through transmitting light and scattering light comparative measurement, and the turbidity is measured according to the strength ratio of the transmitting light to the scattering light, so that influences of aging of the light source on measurement accuracy are eliminated, the advantages of an individual transmitting method or scattering method are inherited, an ascending turbidity measurement range is provided, and measurement adaptability and accuracy can be improved effectively.

The invention discloses a measuring system and measuring method of aerosol scattering and moisture absorbing growth factors. The measuring system comprises a drying pipe, a first nephelometer, a second nephelometer, a humidification pipe, a first three-way valve, a second three-way valve, a first two-way valve, a second two-way valve, a first water bath, a second water bath and a computer. According to the measuring system, an outer-layer casing pipe and an inner-layer semipermeable membrane pipe are adopted to form the humidification pipe, water in the humidification pipe and the water baths form a closed cycle, the water temperature is controlled by the water baths, and the highest relative humidity of a humidified aerosol sample can reach 95%; the two water baths are adopted to participate in humidification efficiency controlling, when the system runs, the working modes of the two water baths are staggered and are the heating mode and the refrigerating mode respectively, and therefore the time resolution can be increased by one time; in addition, in the whole circle period, the system is always in a relative humidity increasing period, and therefore effective data outputting is guaranteed.

Provided are turbidometers and fluorometers having a unique form-factor to accommodate a number of optical components in a confined geometry. This provides the ability to compensate for change in light intensity from an optical source even in a closed-loop manner. The ability to package reference and signal detectors, along with a relatively large diameter LED light source in a confined geometry is particularly suited for applications requiring small-diameter sensors, such as multi-parameter sonde devices having a total diameter that is in the sub-two inch range.

The invention discloses a user-based demarcating method and a sample collecting system of a water nephelometer, effectively solving the technical difficulty that the prior water turbidness numerical value deviates from the water aerosol concentration numerical value. The user-based demarcating method is characterized in that a specific water sample in a water body from a preset user of a nephelometer is taken as standard liquid for demarcating the nephelometer; the collected specific water sample is divided into an A part and a B part, and because the aerosol concentration of the water sample A and the water sample B is equal, when the aerosol concentration of the water sample B is detected by the sample collecting system and a collecting device, the water sample A becomes the standard liquid with known aerosol concentration. The water sample A is put in the electronic nephelometer to be demarcated, and the ratio of the scattered light intensity and incident light intensity or the transmitted light intensity and the incident light intensity of the electronic nephelometer is measured, is converted into digital numbers equivalent to the aerosol concentration of the water sample A, and is conveniently and accurately displayed on a display screen of the nephelometer.

The invention discloses a method for detecting blood chyle degree, determining the chyle degree of blood sample, judging if the blood can be used for clinic according to the result. It uses standard nephelometer card and pipe, the blood chyle degree can be detected through judging the definition of the image on card, the chyle degree is divided into light, middle and heavy chyle, provides gist for clinic blood.

The invention discloses a method of obtaining a spectrum distribution of aerosol particles based on an integrating nephelometer. The method comprises measuring a total scattering coefficient of the aerosol at 7-170 DEG and a backscattering coefficient of the aerosol at 90-170 DEG through the integrating nephelometer, obtaining calculated values of the total scattering coefficient and the backscattering coefficient of corresponding angle ranges based on an assumption that the spectrum distribution of aerosol particles is two lognormal distribution superimpositions and a Mie scattering theory, and analyzing relative deviations of the measured values and the calculated values. A spectrum distribution with a minimum relative deviation is the spectrum distribution of the aerosol particles.

The invention discloses a safe on-line laser optical fiber turbidometer which comprises an electric signal processing unit, a photoelectric device and a water-entry probe, wherein, all electric elements of the turbidometer are distributed in the electric signal processing unit, all photoelectric elements are distributed in the photoelectric device, all the optical elements are distributed in the water-entry probe; the water-entry probe comprises an emitting optical fiber and a receiving optical fiber; the emitting optical fiber and the receiving optical fiber are on the same plane; the scattering light measurement principle (namely the monotony relation that the optical intensity of the scattering light is increased with the turbidity of the liquid) is adopted; by separating the electric elements and the optical elements of the turbidometer to measure the turbidity of the liquid, the direction contact of the electric elements and the measured liquid is avoided, and the practicability, the safety and the accuracy of the product are improved.

The invention belongs to the technical field of water body turbidity measurement and discloses an infrared image pick-up-based water body turbidity measurement device, an infrared image pick-up-based water body turbidity measurement image acquisition system and an infrared image pick-up-based water body turbidity measurement method. According to the infrared image pick-up-based water body turbidity measurement method, an infrared camera is used to acquire the images of transmitted light and scattered light which are generated after light passes through a turbidity solution, the RGB data of the images are obtained through image processing, and the RGB data are transformed from an RGB space to a Lab color space; the Lab values of the images are obtained; and the relations of a series of turbidities and the values of R, G, B, L, a and b corresponding to the turbidities are fitted under scattering, transmission and ratio modes, so that a relational expression of turbidity values and corresponding color components can be obtained and can be applied to the turbidity measurement of an actual water sample. Compared with a commercial ordinary turbidity meter, the method disclosed by the invention has higher accuracy in the measurement of a standard solution; the result of the method is consistent with the result of the turbidity meter in the measurement of a specific water sample; the feasibility of the method is verified; and the method can accurately measure water body turbidities ranging from 0 to 1000 NTU.

The invention provides a method and device for obtaining extinction coefficients of aerosol. The method includes the steps that a laser pulse is emitted into the atmosphere through a lidar, and the power of backscattered light after the laser pulse is scattered by the atmosphere is obtained after receiving and measuring; atmospheric correction parameters at one or more preset positions are obtained through an atmospheric integrating nephelometer; a relational expression between the extinction coefficients of the aerosol and backscattering coefficients is obtained according to the atmospheric correction parameters; and the power of the backscattered light and the relational expression between the extinction coefficients of the aerosol and the backscattering coefficients are substituted intoa lidar equation, and the extinction coefficients of the aerosol at the preset positions are calculated. According to the method and device for obtaining the extinction coefficients of the aerosol, the extinction coefficients of the aerosol can be calculated accurately.

A semi-circular LED array that is comprised of independent high intensity LED components and which in combination, will emit a focused single wavelength of highly accurate and precise frequency, in accordance with the Lambertian principle. The resultant combined light source can then be used in combination with an integrating nephelometer, for purposes of precise ambient air quality monitoring. The entire LED array and housing chamber can be easily interchanged to facilitate separate and different wavelength light sources, as required. The user can, when desired, easily remove the entire LED array, and replace with another LED array of different total wavelength capability. Thus a considerably more versatile and accurate light source is provided for use in nephelometry, that can be automatically adjusted via discrete circuitry to provide a precise and accurate specific wavelength light source, which removes any requirement for external light filters, and which provides significantly increased long life and significantly reduced maintenance requirements. The overall effect is a very stable Light Source which produces a fixed wavelength of light with a distribution that is Lambertian.

The invention relates to an automatic control system and method of sludge age in biological nitrogen and phosphorus removal. The automatic control system mainly comprises a field instrument, a data transmission unit, a data collecting and processing unit and a field actuating mechanism, wherein the field instrument comprises an influent flowmeter, an aeration tank sludge concentration meter, a refluence sludge concentration meter, a residual sludge flowmeter, a residual sludge concentration meter and an effluent nephelometer; the data transmission unit is a wireless AP (Access Point) module of a 485 interface; the data collecting and processing unit is an embedded processing system; and the actuating mechanism is a remote I / O (Input / Output) controlled actuator unit. The automatic sludge age control system adopts the main principle that related parameters in the detection system, such as aeration tank sludge concentration, residual sludge discharge flow, effluent suspended solid concentration, and the like are calculated through the control unit and compared with target sludge age; and the practical sludge age is adjusted to be in a set sludge age range through controlling the sludge discharge size of a sewage treatment system so as to simultaneously meet nitrification and phosphorus removal. The sludge age in the system can be controlled in the formula shown in the specification. The invention can fully and automatically control the sludge age, be simple, practical and worthy of wide popularization.

The invention discloses a method for establishing pathogenic bacterium fingerprint by using Terahertz waves. The method comprises the following concrete steps: subjecting a to-be-detected bacterial strain to enrichment culture, carrying out cleaning with normal saline and collection and adjusting turbidity of a bacterial liquid to 0.5 McFarland (MCF) by using a bacterial nephelometer or turbidity meter; and then carrying out detection under the conditions that Terahertz frequency is 0.2 to 3 THz, wavelength is 100 to 1500 mu m, average wavelength is 300 mu m, nitrogen is used for flushing, ambient humidity is less than 5%, and ambient temperature is 22 DEG C. The method is simple and fast, can detect liquid samples and is capable of identifying the variety of the to-be-detected bacterial strain according to the established fingerprint.

The invention discloses an aerosol phase function observing system and an observing method thereof. The aerosol phase function observing system comprises a laser emission unit, a light trap, a turbidimeter, a scattered signal receiver and a computer. The turbidimeter is installed below a laser beam, and aerosol hemisphere backscattering coefficient is obtained through measurement. The scattered signal receiver is installed beside the laser beam and at the same height of the laser beam. By combining a signal obtained by a CCD camera and the aerosol hemisphere backscattering coefficient measured by the turbidimeter, aerosol phase function is obtained. Different angles of scattering information can be obtained at the same time, and the influence of aerosol scattering performance changing with time on results is avoided. The observing system is simple and effective, is low-cost, provides a new technical means for observation of aerosol phase function, and provides supports for remote sensing observations of inversion of aerosol optical properties related instruments.

A nephelometer for detecting the concentration of particulates in a sample aerosol is provided with a branched flow path with a sample aerosol input, a clean gas input and an output leading to an optical sensor unit. At least one of the inputs has periodic variable flow so that a concentration-modulated gas stream is supplied to the optical sensor unit. The detector output of the sensor unit is processed in synchrony with the concentration modulation to filter out DC components, such as 1 / f noise and parasitic instrument noise.

The invention discloses a turbidimeter and liquid analysis equipment. The turbidimeter comprises a shell, a transparent container, a sample absorption pipe, a luminous unit, at least one first photoelectric conversion unit, at least one second photoelectric conversion unit and a processing unit, wherein sealed space is formed in the shell; the transparent container is arranged in the sealed space; one end of the sample absorption pipe is connected with the transparent container, and the other end of the sample absorption pipe extends out of the shell; the luminous unit is arranged in the sealed space and can emit light to the transparent container; the at least one first photoelectric conversion unit and the at least one second photoelectric conversion unit are arranged in the sealed space; the at least one first photoelectric conversion unit receives directly emitted light emitted by the luminous unit and converts the received directly emitted light into a first electric signal; the at least one second photoelectric conversion unit receives scattered light which is emitted by the luminous unit, penetrates through the transparent container and is scattered, and converts the received scattered light into a second electric signal; the processing unit calculates the turbidity of measured liquid according to the first electric signal and the second electric signal. Due to the mode, the turbidimeter can quickly detect the turbidity of the liquid.

The invention refers to a nephelometric turbidimeter (10) for measuring a turbidity of a liquid sample (49) in a sample cuvette (40). The turbidimeter (10) comprises: a measurement light source (20) for emitting an axial parallel light beam (60) directed to the cuvette (40), a scattering light detector (30) arranged to receive scattered light (66) coming not-axially from the cuvette (40), and a switchable diffuser (50) with an optical diffuser body (52) and a diffuser actuator (54) for moving the diffuser body (52, 52') between a parking position in which the diffuser body (52) does not interfere with the emitted light beam (60) and a test position between the light source (20) and the cuvette (40) in which the diffuser body (52') interferes with the emitted light beam (60) to generate diffuse test light (63) entering the cuvette (40).

A nephelometric turbidimeter vial arrangement includes a vial and a separate vial cap. The vial comprises a transparent cylindrical vial body configured to enclose a vial interior, a bottom inlet window, and a top vial opening configured to be circular. The separate vial cap comprises a light trap cavity. The separate vial cap is configured to close the top vial opening. The light trap cavity comprises an inner surface which comprises a light absorbing surface. The light trap cavity is configured to be open to the vial interior.

The invention discloses a measuring system and measuring method of aerosol scattering and moisture absorbing growth factors. The measuring system comprises a drying pipe, a first nephelometer, a second nephelometer, a humidification pipe, a first three-way valve, a second three-way valve, a first two-way valve, a second two-way valve, a first water bath, a second water bath and a computer. According to the measuring system, an outer-layer casing pipe and an inner-layer semipermeable membrane pipe are adopted to form the humidification pipe, water in the humidification pipe and the water baths form a closed cycle, the water temperature is controlled by the water baths, and the highest relative humidity of a humidified aerosol sample can reach 95%; the two water baths are adopted to participate in humidification efficiency controlling, when the system runs, the working modes of the two water baths are staggered and are the heating mode and the refrigerating mode respectively, and therefore the time resolution can be increased by one time; in addition, in the whole circle period, the system is always in a relative humidity increasing period, and therefore effective data outputting is guaranteed.

The invention provides a quick-response high-precision light scattering turbidimeter measuring device. The device comprises a flexible cavity, a shading film layer covering the inner wall of the flexible cavity, a supporting structure arranged at the top of the flexible cavity, a vent hole formed in the bottom of the flexible cavity, a supporting plate arranged at the bottom of the flexible cavity, and a light scattering turbidimeter arranged on the supporting plate of the flexible cavity. When measurement is started, air in the cavity is emptied through the vent hole, then aerosol to be measured is injected, and the particle characteristics of the aerosol are measured through the light scattering turbidimeter. Measurement is conducted in the closed cavity, the particle size measurement range is wide, and compared with a rigid cavity which is difficult to exhaust, the flexible cavity can exhaust air through the volume change, the cavity machining cost is reduced, a large amount of gasis saved and the gas exchange speed is increased, and the measurement efficiency is improved. In addition, the flexible volume is expanded conveniently, diffuse scattering of the cavity wall is reduced due to the large volume and the signal-to-noise ratio of measurement is improved.

The invention discloses a measuring apparatus for the sewage turbidity including the turbidity sensor, the detection circuit connected with the turbidity sensor and the current measuring circuit of the sewage treating electric engine connected with the detection circuit which the communication interface of the CPU is connected with the epigynous machine or the far-end monitoring system by the series interface module. The invention can measure the electronic engine working data and the sewage measuring data at a same time; also it can transfer in a far distance and has the revising function.

A nephelometer that measures turbidity of low volume suspensions using measurements of light transmitted through and / or scattered by the sample. The sample suspension is placed in a tiered cuvette adapted to facilitate measuring the turbidity of low volume samples. The lower portion of the cuvette has smaller dimensions, in horizontal cross section, than the top portion. Both lower and upper portions have angled surfaces. The lower, smaller portion of the cuvette is interrogated by the nephelometer.

The invention relates to a combined detection agent for measuring the content of rapidly available potassium in soil, and belongs to the technical field of analysis and detection. The combined detection agent for measuring the content of the rapidly available potassium in the soil comprises potassium detection powder and detection masking liquid. During use, the content of the rapidly available potassium in the soil is measured by adopting a portable spectrophotometer or a nephelometer or a visible turbidimetric method only by adding the potassium detection powder and the detection masking liquid into a measurement sample solution. Compared with the prior art, the combined detection agent for measuring the content of the rapidly available potassium in the soil, disclosed by the invention,has the advantages that the preparation method is simple, and the detection agent is stable and reliable in performance, convenient to carry and use and suitable for quick measurement of the content of the rapidly available potassium in the soil.