94 results about "Turbidity Measurement" patented technology

The invention discloses a dual optical path type scattered water quality turbidity measurement apparatus. The water quality turbidity measurement apparatus comprises a signal processing unit and a measurement chamber, wherein a light source is arranged in the measurement chamber, the turbidity measurement apparatus is characterized in that a semi-reflecting translucent mirror is arranged below the light source, a collimating lens is arranged below the semi-reflecting translucent mirror, a first detector is arranged in the measurement chamber, the light source is received by the first detector after being reflected by the semi-reflecting translucent mirror and then is transmitted to the signal processing unit, the light source is irradiated into a detected water sample through the collimating lens after being subjected to transmission by the semi-reflecting translucent mirror; a converge lens and a second detector are arranged in a direction vertical to a parallel light, light rays, scattered by 90 DEG by the detected water sample, of the parallel light are received by the second detector trough the convergence lens and are transmitted to the signal processing unit, the convergence lens and the second detector are arranged in the detected water sample, the collimating lens is arranged above the detected water sample, and the signal processing unit is used for processing received signals so as to obtain a turbidity value of the detected sample. The turbidity measurement apparatus disclosed by the invention is simple in structure, small in volume and relatively high in measurement precision.

The invention discloses a non-invasive biomass online detection device used for shake-flask culture. The device comprises a master control unit, a shake flask capable of containing biological turbid liquid and a fixing sleeve covering the outer side of the shake flask. A detection probe is connected to the fixing sleeve on the outer side of the bottom of the shake flask. The detection probe comprises a substrate capable of being attached to the bottom of the shake flask, a light source, a photoelectric sensor and an acceleration sensor, wherein the light source, the photoelectric sensor and the acceleration sensor are arranged on the substrate. The light source can generate a light path obliquely irradiated into the shake flask. The photoelectric sensor is located below the light path and used for measuring scattering light generated after the light path is irradiated to the biological turbid liquid. The light source, the photoelectric sensor and the acceleration sensor are all connected with the master control unit. According to the non-invasive biomass online detection device, a turbidity measurement method is adopted for performing online detection on the concentration of bacterial liquid cultured in the shake flask through a back scattering light measurement technology, and the concentration of the biological turbid liquid in the shake flask can be detected under the condition that culture equipment is not broken. The non-invasive biomass online detection device is simple in structure, low in cost, and capable of effectively improving detection efficiency and precision and avoiding sample contamination.

A turbidity measurement system includes a sample assembly that contains a plurality of samples, a light source that illuminates the sample assembly, and a light detection system that includes a two-dimensional light-sensitive array. The light-sensitive array is simultaneously exposed to light transmitted through each of the samples in the sample assembly. The exposure is analyzed to determine a mean transmitted light intensity for each sample and to calculate a turbidity value for each sample based on its mean transmitted light intensity. Multiple exposures may be taken during a measurement period so as to obtain time-resolved turbidity measurements of the samples. The temperature of the samples may be varied during the measurement period so as to measure turbidity as a function of temperature.

A method for compensating for changes in output power or wavelength of an optical source with temperature. Many optical sources have power and/or wavelength variations with temperature which can be compensated by open- or closed-loop methods if a method of accurately measuring the optical source temperature is available. The voltage across a semiconductor junction varies with temperature. Measuring the optical source power or wavelength variation with temperature and tracking the voltage across the semiconductor junction provides a means for compensating an instrument for temperature induced optical output power or wavelength variations. An important field of application is optical density or turbidity measurements in cellular media.

The invention provides a sensor structure for measuring the turbidity, which comprises a transmitter and a receiver. The sensor characterized in that the transmitter is a light-emitting element 1 for dissipating ultraviolet and the receiver is a light-receiving element 2. The light-receiving element 2 is arranged to be at an opposite position with the light-emitting element 1 and the light-emitting element 1 is at a certain distance from the light-receiving element 2. The sensor is low in cost and small in the error of the measurement range, which can effectively perform the turbidity measurement. Meanwhile, the turbidity can also be measured during the movement of the sensor. Therefore, the sensor can be widely applied to the turbidity measurement for various fluids.

A method for determining the percent of a solid material dissolved into a liquid medium is disclosed. The method comprises the steps of combining the solid material and the liquid medium; determining the initial solid concentration (i); determining the dynamic solid concentration (d) using a light scattering technique; and calculating the percent dissolved material according to the formula: [(i-d)/i]x100. Methods for determining dissolution rate and particle size using turbidity measurements are also disclosed.

An appliance is disclosed for improving the accuracy of turbidity measurements. In an exemplary embodiment, the appliance includes a turbidity sensor and at least one processing device in communication with the turbidity sensor. The at least one processing device is configured to conduct a measurement of turbidity with the turbidity sensor exposed to air instead of water so as to provide a reference output from the turbidity sensor exposed to air; measure a turbidity of a fluid in the appliance during operation of the appliance with the turbidity sensor exposed to the fluid so as to provide a measurement output from the turbidity sensor exposed to the fluid; determine a temperature of the fluid; and apply an offset to the measurement output in order to provide an adjusted output, the adjusted output compensating for the difference in output of the turbidity sensor in water instead of air and for the temperature of the fluid.

The invention discloses a method for measuring potassium by the sodium tetraphenylborate turbidimetry and a masking agent which is used by the method. The masking agent is a water solution containing 0.01 to 0.04mol/l of Cu<2+>, 0.04 to 0.10mol/l of tartaric acid and 5 to 10mol/l of H<+>; the method for measuring the potassium by the sodium tetraphenylborate turbidimetry is that: the masking agent is used for masking ammonium ion and other interfering ions in liquid under test, basic EDTA disodium salt solution is further added to carry out the auxiliary masking, basic sodium tetraphenylborate water solution is finally added, and the turbidity measurement is immediately carried out after shaking the reaction solution well. The measurement method has the advantages of simple operation, rapid and accurate measurement and low cost; the linear range thereof meets the requirements of the rapid measurement, which is suitable for the application of grass roots and agriculture popularization departments; and the masking agent used does extremely small harm to the human body and the environment.

The invention belongs to the technical field of water treatment, and provides a high-precision high-accuracy turbidity measurement device and method. The high-precision high-accuracy turbidity measurement device comprises an LED light source unit, a prism set unit, a photoelectric signal receiving unit and a single chip microcomputer unit, which are sequentially connected; the single chip microcomputer unit is also connected with the LED light source unit; the single chip microcomputer unit transmits a pulse signal to the LED light source unit, and the LED light source unit generates a modulation light signal and then transmits the modulation light signal to the single chip microcomputer unit; the prism set unit receives the light signal and outputs scattering light in parallel with incident light; the photoelectric signal receiving unit converts the scattering light into an electric signal and transmits the electric signal to the single chip microcomputer unit; the single chip microcomputer unit performs temperature compensation, reference signal comparison and light intensity compensation processing on received numerical value information to obtain the turbidity value of a water body to be tested. The high-precision high-accuracy turbidity measurement device and method have the advantages that weak signals associated with a reference signal can be detected; signals unassociated with the reference signal are filtered, the influence of temperature and light intensity on turbidity measurement is reduced, and the precision and the accuracy of measurement are improved.

The invention discloses a multi-parameter water quality detection and rating system and a water quality rating method thereof. The system includes a data analysis module and several data acquisition modules; the data acquisition module includes an acquisition control unit, a solution temperature measurement unit, a solution pH measurement unit, a solution The turbidity measurement unit, the solution conductivity measurement unit, the power supply unit and the first communication unit; the data analysis module includes a data analysis control unit, a second communication unit, a display unit and a storage unit; the acquisition control unit is used to collect the collected solution temperature , pH, turbidity, and conductivity are sent to the second communication unit through the first communication unit; the data analysis unit is used to store the solution temperature, pH, turbidity, and conductivity received by the second communication unit into the storage unit for analysis. The water quality level of the solution, and the display unit is controlled to display the solution temperature, pH, turbidity, conductivity and water quality level. The invention has low cost, multiple parameters and high cost performance.

A turbidity measurement system with an improved thermal behavior is provided. A turbidity measurement system includes an analyzer and one or more turbidity sensors. Each turbidity sensor includes a source of illumination and a semiconductor-based illumination sensor. The dark current of the semiconductor-based illumination sensor is measured when no illumination is provided by the source. This measured dark current is then used to provide a dark current-compensated turbidity measurement.

The invention relates to the field of water quality detection and particularly relates to a turbidity measurement method and device. The measurement method comprises the following steps: irradiating a sample to be detected by using paralleled light; receiving actually-measured light intensity of transmission light and scattered light; calculating an attenuation coefficient on light by the sample to be detected; and according to the attenuation coefficient and the actually-measured light intensity of the transmission light vertical to the transmission direction of the paralleled light, calculating compensation light intensity so as to obtain the turbidity of the sample to be detected. The measurement device comprises a body and at least two light detectors; the body is provided with a containing cavity and is used for receiving the sample to be detected; a light source and each light detector are located at the peripheral edge of the containing cavity; and at least one light detector is arranged at each of parts of the body in the light transmission direction of the light source and the light transmission direction vertical to the light source. According to the turbidity measurement method and device, the compensation of absorption coefficients in a water sample is carried out on the scattered light by using the transmission light, and the turbidity measurement precision is improved; and meanwhile, a turbidity measurement range is relatively large, and the design and production are convenient.

The invention relates to an environment online monitor and a monitoring method thereof. A probe type water quality multi-parameter online monitor comprises a meter head controller, a transmission cable and a probe body; the probe body comprises a light source module, a detection module and a circulating sample chamber. The invention further discloses monitoring methods of the monitors manufactured according to any technical scheme. Due to the adoption of the technical scheme, three parameters of the chemical oxygen demand (COD), turbidity and chromaticity can be measured at the same time. Meanwhile, by means of accurate turbidity measurement, a final ultraviolet absorbing method COD measurement result is compensated for.

A washing machine control method and washing machine, said control method comprising: after wash water has been used for washing, performing a turbidity measurement to determine the turbidity value P of the wash water; according to the wash water turbidity value P, determining the number of flocculation cycles N of the wash water. According to the intake water amount L, the washing machine determines the number of base flocculation cycles N1 of the wash water; determining, according to the wash water turbidity value P, the number of variable flocculation cycles N2, to arrive at the number of flocculation cycles N=N1+N2 of the wash water. The washing machine comprises: a washing drum (2), a clothes-washing structure arranged inside the washing drum (2), and a flocculation processing unit arranged on the washing drum exterior; after water is flocculated in the flocculation container, said flocculation processing unit cleaning the flocculated water, producing clean water; discharging the water back into the washing drum (2) to be used once again by the washing machine for rinsing. The described method and device accurately control the number of washing machine flocculation cycles, improving efficiency in flocculation self-cleaning of the wash water.

The invention relates to a water environment online monitoring device, system and method. A COD and ammonia nitrogen multiparameter online monitoring device comprises an ultraviolet LED, an infrared LED and a visible LED which are arranged on one side of the X-axis direction of a digestion pool, and an ultraviolet photoelectric detector and a first visible infrared photoelectric detector which are arranged on the other side of the X-axis direction of the digestion pool, wherein the first visible infrared photoelectric detector acquires transmission light source signals emitted by the infrared LED and the visible LED. A second visible infrared photoelectric detector is arranged in the Y-axis direction of the digestion pool and acquires infrared scattering light source signals emitted by the infrared LED. The monitoring device, system and method are reliable. COD and ammonia nitrogen are monitored in the same water sample, and compensation of COD and ammonia nitrogen measured values is achieved through turbidity measurement.

The invention discloses a turbidity sensor and belongs to the technical field of measurement of liquid parameters. The turbidity sensor comprises a shell, a light source and a photoelectric receiving module, wherein the shell is a barrel-shaped shell with a planar bottom surface; the light source is arranged on the inner side of the side wall of the shell and close to the bottom surface of the shell and is capable of emitting parallel light to the bottom surface; an included angle formed between the parallel light and the bottom surface of the shell is 20 degrees; two transparent window mirrors, namely a first window mirror and a second window mirror, which are successively arranged along the light outgoing direction of the light source, are embedded into the bottom surface of the shell; the first window mirror is arranged at the intersection point between light emitted by the light source and the bottom surface of the shell; the photoelectric receiving module comprises two photoelectric detectors, namely a first photoelectric detector and a second photoelectric detector, which are arranged in the inner space of the shell and are used for detecting the density of light incoming from the first window mirror and the second window mirror and perpendicular to the parallel light emitted by the light source, respectively. The invention also discloses a turbidity measurement device. The turbidity sensor and the turbidity measurement device have the advantages of simple structural design, high accuracy and wide measurement range.

The invention discloses a device for absorbing transmission light during turbidity measurement. The device comprises a light inlet hole, a primary reflector, a secondary reflector, a light absorption trap and a fixing hole. The device is fixed to the plane perpendicular to transmission light penetrating through a sample through the fixing hole in a base plate. The transmission light irradiates on the primary reflector through the light inlet hole, and a 45-degree angle is formed between the transmission light and the primary reflector. After being reflected by the primary reflector, the transmission light irradiates on the secondary reflector, and a right angle is formed between the surface of the secondary reflector and the surface of the primary reflector. The transmission light is reflected by the secondary reflector into the light absorption trap in isolated space and then absorbed by the light absorption trap.

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 relates to a dynamic thermal mechanical analysis method for measuring the phase transition temperature of temperature-sensitive hydrogel. The method based on dynamic thermal mechanical analysis (DMA) carries out measurement by employing a penetration-mode probe to simulate a compression mode so as to obtain a curve representing changes of dynamic mechanical parameters with temperature, and thus, a storage modulus (E')-temperature (T) curve and a deformation (dL)-temperature (T) curve can be further obtained; and the phase transition temperature of the hydrogel can be determined according to the initial increasing temperature on the E' curve or the initial attenuation temperature of deformation on the dL curve. According to the invention, the method employs the DMA penetration-mode probe to test a cylindrical or block temperature-sensitive hydrogel sample within a proper temperature range (wherein phase transition temperature is +/- 30 DEG C) so as to obtain the dynamic mechanical temperature curves, so the phase transition temperature value of the hydrogel can be determined. The method provided by the invention overcomes the disadvantages of volatilization of moisture in the process of weighing and cracking and breakage of samples due to long-time soaking in a traditional temperature-variable weighing method, the disadvantage of proneness of a differential scanning calorimetry (DSC) curve to influence of water peaks in a traditional DSC method and the disadvantage of long equilibration time in a traditional ultraviolet (UV) turbidity measurement method. The method provided by the invention has the advantages of small usage amount of a desired sample, simple preparation, easy testing operation and simple and visual data, and is especially applicable to detection of temperature-sensitive hydrogel samples with fast water absorption rates.

The invention discloses a method for controlling flocculation processing water of a washing machine through turbidity measurement and the washing machine. The washing machine comprises a washing machine body and a water circulation processing system, wherein the water circulation processing system comprises a flocculation container used for performing flocculation processing on water discharged from the washing machine body; the flocculation container is provided with a turbidity detection device; whether the set condition is met or not is judged through detecting the turbidity of the water after the flocculation through flocculation agent putting in each time; and if the condition is not met, a measure of putting the set quantity of flocculation agents for realizing the flocculation processing on the water in different times is adopted until the set condition is met. The method of measuring the turbidity value is used for judging the putting of the flocculation agents; the method is simple; the putting quantity of the flocculation agents is precise; the defect of poor flocculation effect or even failure due to great error is avoided; the water circulation processing efficiency is improved; and the rinsing water is saved.

The invention discloses an underwater illumination lamp based on the transmission turbidity measurement principle, and discloses the underwater illumination lamp. The lamp comprises a lamp body, a lamp support, a reference infrared light source, an infrared filter, an infrared photoelectric sensor, a cable connector, an LED drive module, an LED lamp, a lampshade housing, a main circuit board, a signal detection processing module, a constant current source drive part, a power module, and a microcontroller. One end of the main circuit board is electrically connected with the signal detection processing module, and the other end of the main circuit board is electrically connected with the constant current source drive part. The LED drive module is electrically connected with the other end of the main circuit board. The infrared photoelectric sensor is electrically connected with an unoccupied end of the signal detection processing module. The reference infrared light source is electrically connected with an unoccupied end of the constant current source drive part. The lamp can automatically adjust the luminous flux, can enable the illuminance of a specific work surface in underwater illumination to be constant, and can improve the quality of underwater illumination. The invention also relates to a light adjustment method for the underwater illumination lamp based on the transmission turbidity measurement principle.

The invention discloses an infrared turbidity detection device which comprises a power module, an infrared light transmitting module, an infrared light receiving module, a signal amplification module, a control module and a display module, wherein the power module is used for outputting constant direct current (DC) voltage; the infrared light transmitting module is arranged above liquid to be detected, and the infrared light transmitted by the infrared light transmitting module is transmitted into the surface of the liquid to be detected in a way of vertical incidence; the infrared light receiving module is used for receiving the light scattered by the liquid to be detected; the signal amplification module is connected with the infrared light receiving module and the control module, and is used for amplifying the signals output by the infrared light receiving module and sending the signals into the control module; the control module is connected with the display module, and is used for receiving the signals of the signal amplification module and controlling the display module to display the information. After the technical scheme is adopted, the influence of chromaticity and background light to turbidity measurement can be eliminated; the infrared light receiving part adopts two-stage amplification, so that the measurement accuracy of the turbidity is improved.

The invention discloses underwater all-angle turbidity measurement equipment and a measurement method. The measurement equipment comprises a sealing cover, a cavity, a reflector ring, a light source, an ultrasonic transducer, a collimating lens group, a convex lens, a supporting seat, a pressing ring, a circuit board, a battery and a water sealing connector. The light source and the sensor are integrated in a small cavity and can be immersed in water after being sealed, so that the turbidity of surrounding water can be measured, and in-situ turbidity measurement is realized. According to the reflector ring, light scattered to each direction by a to-be-measured sample is reflected to the same direction, light intensity signals which can form various angles with incident light can be acquired by virtue of a light intensity sensor, the acquired information is comprehensive, and the turbidity is accurately measured. According to a weighted proportional method for data processing, a relationship between the light intensity and the turbidity can be accurately fitted, and the turbidity is accurately measured.

The invention provides a double-chamber flow cell turbidity measurement system and a control method thereof. The double-chamber flow cell turbidity measurement system adopts a double-chamber flow cell with a defoaming chamber and a measurement chamber, the defoaming chamber and the measurement chamber can operate separately, the double-chamber flow cell turbidity measurement system can effectively take measurement accuracy, timeliness and system miniaturization requirement into account, moreover, the double-chamber flow cell turbidity measurement system can have high adaptability to a measurement environment with great turbidity change and bubble content, and a new implementation scheme is provided for turbidity measurement systems; furthermore, the control flow of the measurement control method of the double-chamber flow cell turbidity measurement system disclosed by the invention is simple, and besides, while high measurement accuracy is ensured, the timeliness of system measurement is increased; in addition, the double-chamber flow cell turbidity measurement system disclosed by the invention also can implement self-cleaning control to clean the double-chamber flow cell in order to reduce the situation that the accuracy of turbidity measurement is affected by dirt deposited in the double-chamber flow cell, decrease the false detection rate and increase measurement accuracy.

The invention relates to the technical fields of medicine and biochemistry, in particular to a kit for measuring procalcitonin. The purpose of the present invention is to solve the problem of complex operation and low measurement accuracy in the detection process of fixed procalcitonin in the prior art. The double reagent used in the present invention firstly mixes the reagent R1 containing the anti-human rheumatism factor antibody with the sample , so that the rheumatoid factor antigen in the sample combines with the anti-human rheumatoid factor antibody in reagent R1 to form an antigen-antibody complex, so as to achieve the purpose of clearing the rheumatoid factor antigen; The reagent R2 is mixed with the above sample, and the procalcitonin antigen is specifically combined to form an insoluble polystyrene microsphere-antigen-polystyrene microsphere particle complex emulsion, which produces a certain turbidity, and at a certain wavelength The content of procalcitonin detected in the sample can be measured by performing turbidimetric determination. The invention has the advantages of high accuracy, no pollution, convenient operation and the like.