30results about How to "Concentration determination" patented technology

An air purification system is provided which includes measurement of a concentration of a target pollutant within the air. A gas sensor is used for sensing a concentration of the pollutant (although it will detect other pollutants as well due to cross-sensitivity). A filter is provided which selectively removes the target pollutant while having a significantly smaller effect in reducing other pollutants to which the sensor is cross-sensitive. A gas sensor response is obtained before filtering, a gas sensor response after filtering, and the sensitivity characteristics of the gas sensor to the pollutant are processed, thereby to determine a gas concentration of the pollutant in the air before filtering. In this way, the concentration measurement is better than a direct measurement with the gas sensor as a result of a low selectivity of the gas sensor.

A device for measuring the concentration of a slurry solution, according to an embodiment, comprises: a sensor unit including a first sensor for measuring conductivity of the solution, a second sensorfor measuring ultrasonic wave propagation velocity of the solution, and a third sensor for measuring light absorbance of the solution; and a concentration measurement unit for measuring the concentration of hydrogen peroxide and the concentration of slurry in the solution in real time by analyzing the conductivity, the ultrasonic wave propagation velocity, and the light absorbance inputted from the sensor unit.

The invention relates to a system (100) to determine concentrations of components of a multiphase fluid, the system (100) comprising: a first flowmeter (108) configured to receive a fluid flow and to generate one or more measurements of the fluid flow, the fluid flow including a first liquid and a second liquid, wherein the first and second liquids are immiscible; a separation vessel (114) configured to receive the fluid flow, and to at least partially separate the first liquid and the second liquid; a second flowmeter (106) configured to receive either the second liquid or a mixture of the first liquid and the second liquid, through a valve and to generate one or more measurements of either the second liquid or the mixture of the first liquid and the second liquid, wherein a proportion of the second liquid to the first liquid in the mixture is greater than a proportion of the second liquid to the first liquid in the fluid flow; a third flowmeter (110) configured to receive the first liquid and to generate one or more measurements of the first liquid ; and a data processing apparatus (124) operatively coupled to the first flowmeter (108), the second flowmeter (106), the third flowmeter (110), the data processing apparatus (124) configured to perform operations comprising: receiving the one or more measurements of the fluid flow from the first flowmeter (108); receiving the one or more measurements of the second liquid or the mixture of the first liquid and the second liquid from the second flowmeter (106); receiving the one or more measurements of the first liquid from the third flowmeter (110), and determining a concentration of the second liquid in the fluid flow.

The invention discloses a system for detecting the concentration of a solution based on an SPR sensor. The system comprises the SPR sensor, a broadband light source, a sample cell, a fiber optic spectrometer and a computer, the SPR sensor is arranged in the sample cell, the input end of the SPR sensor is provided with an input optical fiber, the output end of the SPR sensor is provided with an output optical fiber, the input optical fiber is connected with the broadband light source, the output optical fiber is connected with the fiber optic spectrometer, and the fiber optic spectrometer is connected with the computer through a data line, wherein the SPR sensor includes a detection optical fiber and an asymmetric metal film arranged on the detection optical fiber, the detection optical fiber includes a single-mode optical fiber and multimode fibers bilaterally symmetrically arranged at two ends of the single-mode optical fiber, and the two multimode optical fibers are connected with the single-mode optical fiber through welding.

The invention relates to a method for operating a washing machine (1) with a container (2), a drum (3) for receiving laundry (4), a drum (3) drive motor (5), a container (2) for An electrochemical sensor (9) and a control device (8) for measuring electrochemical signals related to the components of the aqueous liquid (7) in the container (2), (a) providing an aqueous liquid (7) containing detergent in the container (2); (b ) rotating the drum (3) according to a preset motion program; (c) ending the rotating motion of the drum (3) and making the aqueous liquid (7) containing detergent stable until the aqueous liquid (7) containing detergent is in a preset steady state; ( d) receiving and analyzing the electrochemical signal from the electrochemical sensor (9) by using the correlation between the electrochemical signal of the control device (8) and the detergent concentration, and measuring step (a) aqueous liquid (7) detergent concentration c ten . The invention relates to a washing machine (1) suitable for carrying out said method.

An automatic monitoring method and monitoring system for flue gas pollutants is to continuously and real-time track and measure pollutants in flue gas discharged from fixed pollution sources. When the measuring range is exceeded, through the control of the inlet of the sampling pipeline, the flue gas pollutants exceeding the measuring range can also be accurately detected, so that accurate and effective automatic monitoring data can be provided in a timely and complete manner.

An embodiment of the invention provides an optical fiber methane sensor for monitoring concentration change of methane gas. The optical fiber methane sensor comprises a port and a sensing element, wherein the sensing element comprises a single mode optical fiber, a multimode optical fiber, a sensing optical fiber, a methane sensitive film and a metallic reflection film, wherein the single mode optical fiber, the multimode optical fiber and the sensing optical fiber are sequentially connected, a coating layer of the sensing optical fiber is covered with the methane sensitive film, the metallic reflection film is located at one end of the sensing optical fiber, and the port is located at one end of the single mode optical fiber.

The invention relates to a method for detecting content of free hydrochloric acid in a titanium tetrachloride water solution. The method comprises the following steps: 1) pumping different volumes of TiCl4 into a certain amount of ultrapure water under protection of a cold water bath by virtue of a peristaltic pump, so as to obtain different concentration of TiCl4 water solutions; 2) neutralizing TiCl4 water solutions with a standard NaOH solution, so that the pH value of the titration end point is smaller than or equal to 0.1; and 3) calculating the content of free HCl in an original TiCl4 water solution according to the gross of the standard NaOH solutions and the final pH value of the solution. The detection method provided by the invention is high in maneuverability, rapid and accurate; meanwhile, the pH value of the titration end point is controlled to be smaller than or equal to 0.1; the detection interference generated by hydrolysis is avoided; the accuracy of the detection result is improved; and the relative deviation of the detection result is smaller than 4%.

The method and device for methane air mass interface identification and adjustable range laser remote measurement of methane concentration of the present invention relate to the field of gas detection and analysis, and are composed of an STM32 controller, a laser drive circuit, a laser temperature control circuit, a photoelectric detection circuit, and a phase-locked demodulation circuit. , three-dimensional space laser measurement tracker and built-in wind speed sensor, the STM32 controller is respectively connected with the laser drive circuit, laser temperature control circuit, phase-locked demodulation circuit and three-dimensional space laser measurement tracker circuit; the photoelectric detection circuit and phase-locked demodulation Circuit connection. The invention has fast measurement speed, response time of ms level, high measurement sensitivity, reaching ppm level, maximum detection distance of 100 meters, and one-time detection of 30 meters long range, which improves detection efficiency; The high dust and strong corrosive gas environment under test has no effect on the measurement results; and the remote detection function enables the detection of places that cannot be reached or are difficult to reach.

Background component concentration data representing the actual background composition of the sample gas is used to model the absorption spectroscopy measurement data obtained for the gas sample, and based on this modeling to correct the analysis of the absorption spectroscopy data (e.g. for structural disturbances and collisions). widening).

The invention discloses a Ce-based composite catalyst suitable for hydrogen sulfide catalytic reduction desulfurization and denitrification processes and a preparation method thereof. The composite catalyst is prepared from an Al2O3-TiO2 composite carrier and an active component CeO2 supported by the carrier. The preparation method comprises 1) preparing an Al2O3-TiO2 composite carrier, and 2) preparing the composite catalyst CeO2 / Al2O3-TiO2. The preparation method of the catalyst is simple and has industrial large-scale production feasibility. In a common industrial catalytic temperature section at 200 to 400 DEG C, good simultaneous removal of two ingredients is realized and the amount of the by-product NH3 is low. The Ce-based composite catalyst has a high economic value and promotion value. In the later period, a high conversion rate of the nitrogen oxides and sulfides is realized through the modified catalyst and reaction conditions.