54 results about "Carbon Dioxide Measurement" patented technology

The invention discloses a large-range carbon dioxide monitoring system based on a wireless sensor network, which comprises a monitoring server. The monitoring server is connected with a plurality of carbon dioxide monitoring devices at different positions in an atmospheric environment in a wireless mode; the carbon dioxide monitoring devices comprise power modules, microprocessors, carbon dioxidemonitoring sensors connected with the microprocessors, and wireless radio frequency transceiver modules; the power modules supply power to the whole carbon dioxide monitoring devices; the carbon dioxide monitoring devices are mutually connected and communicate through the respective wireless radio frequency transceiver module. The invention carries out large-range unified monitoring on the content of carbon dioxide in complex environments and places through the multi-hop mechanism of the wireless sensor network, improves the accuracy of carbon dioxide measurement by utilizing a parsing algorithm, overcomes the problem of high difficulty of real-time accurate large-range carbon dioxide monitoring and is suitable for various large-range complex environments.

A nasal cannula which comprises a face piece comprising first and second nares which each communicate with a respective nostril of a patient. A septum divides the face piece into first and second flow paths such that the first flow path communicates with the first nare and the second flow path communicates with the second nare. A leading end of the first nare is configured to form a fluid barrier within a first nostril and facilitate only supplying an insufflation gas, via the first flow path, to the patient and prevent exhausting any of exhaust gas, of the patient, through the first nostril of the patient. A leading end of the second nare is configured to facilitate collecting some of the exhaust gas, from the patient, via the second flow path as well as exhausting a remainder of the exhaust gas out through a second nostril of the patient.

The invention relates to the technical field of measurement, control and calibration of facility production carbon dioxide and discloses a system and a method suitable for measurement, control and calibration of carbon dioxide in a greenhouse environment. The system comprises a wireless carbon dioxide measuring device (16) and a wireless control device (18). The wireless carbon dioxide measuring device (16) is used for collecting fertilization concentration of carbon dioxide in a greenhouse, photosynthetically active radiation values, air temperature and humidity data and storing air fertilizer standard values of different crops at different growth periods so as to serve as a decision basis for carbon dioxide concentration fertilizing time and fertilizing amount. The wireless control device (18) is used for obtaining the data and the standard values from the wireless carbon dioxide measuring device (16) and controlling instructions to perform carbon dioxide fertilization control. The wireless carbon dioxide measuring device (16) adopts calibration methods including gas concentration change rate tracking, outdoor gas concentration, temperature and humidity compensation and the like to perform carbon dioxide calibration. The system and the method can achieve measurement, control and calibration of carbon dioxide in the greenhouse environment.

The present invention relates to a carbon dioxide measuring device, and more particularly, to a carbon dioxide measuring device in which a reference electrode signal transfer pattern is formed on one side of a heating unit to connect an electromotive lead wire for measuring carbon dioxide concentration to the outside of a portion at which the heating unit contacts a carbon dioxide sensor to thereby prevent generation of a gap, and a problem that a sealant is diffused into the reference electrode to have an effect on electromotive force is prevented to thereby increase durability and accuracy and also increase reliability of measurement of carbon dioxide concentration.

The invention discloses a three-dimensional simulation culture system for stem cells, and belongs to the technical field of biology. The invention solves the problems of complex operation, low efficiency, small yield and poor quality in an existing in-vitro culture of stem cells. The three-dimensional simulation culture system for the stem cells comprises a stem cell nest, a heart region first peristaltic pump, a lung region, a kidney region, a spleen region, a stomach region, a liver region, a first fluid pressure gauge, a first pressure regulating valve, a liquid level meter, a three-way valve, a first control valve, a temperature regulator, a thermometer, an oxygen/carbon dioxide measuring instrument, a PH measuring instrument, a nutritional ingredient measuring instrument, a second control valve, a second peristaltic pump, a third peristaltic pump, a urea/uric acid/inorganic salt measuring instrument, a fourth peristaltic pump, a third control valve, a second fluid pressure gauge,a second pressure regulating valve, a fourth control valve, a fifth control valve, a fifth peristaltic pump, a sixth control valve, a gas permeable membrane, a dialysis membrane, a central control platform, a cloud data center and an electromagnetic field. According to the three-dimensional simulation culture system for the stem cells, the stem cells with higher quality and quantity can be cultured, the stability is good, and the treatment effect of the stem cells is improved.

Quantitative colorimetric carbon dioxide measurement and measurement systems and methods are disclosed. The methods can include methods for calibrating a chemical colorimetric indicator used in the quantitative colorimetric carbon dioxide measurement system. Apparatuses are disclosed including a cartridge comprising a chemical colorimetric indicator that is configured to removably engage with a quantitative colorimetric measurement system. Cartridges containing a sealed container comprising a reference gas with a known concentration of carbon dioxide are also disclosed. Systems and methods for humidifying the chemical colorimetric indicator are also provided. Methods for using the systems are also disclosed including providing a breathing therapy to a patient or user.

A breath parameter measuring device is described which takes into account breathing patterns which historically have been incompatible with accurate measurements. In particular, during fast breathing patterns, the sensor performing the measurement may not be able to respond quickly enough to provide the true reading. The disclosure may be useful for example in the case of neonatal breath carbon dioxide measurements.

The invention discloses a ventilated safety elevator for smart cities, comprising a car, an active fan, an active air intake pipe, a dynamic air intake pipe, a purification channel, an air purification device, an air outlet channel, an exhaust port, an anion generator, carbon dioxide The measuring instrument, the installation window, the U-shaped support frame, the lower beam, the permanent magnet, the first through hole, the second through hole, and the upper surface of the U-shaped support frame are uniformly provided with a plurality of shock absorbing mechanisms, and the top of the shock absorbing mechanism is provided with The movable car bottom is provided with a door-shaped connecting bracket between the second through holes. The invention is simple and reasonable in structure, quick and convenient to use, improves the comfort of passengers, improves the quality of the air entering the car, and increases the safety of the elevator ride; the cushioning airbag avoids the contact and friction between the car and the well wall, When driving, the airbag can play a certain buffering role, and the safety factor is greatly improved.

A CO₂ sensor includes: a sensing portion operable to change in color in accordance with a CO₂ partial pressure in expiration from at least one of nares and a mouth of a living body; and a mounting member adapted to hold the sensing portion at a position where the expiration from the at least one of the nares and the mouth impinges on the sensing portion.

The invention discloses a detection method for quickly measuring components of coarse coal gas and a related device, and mainly solves the problems of nonlinearity of carbon dioxide measurement, high TCD detection limit, high cost of multi-chromatographic column measurement system, long detection duration and the like of the conventional gas chromatographic analysis technology for the coarse coal gas. The device for quickly measuring the components of the coarse coal gas mainly comprises a purifying device, a chromatographic column separation device, a conversion device, a detector and a data processing unit. The purifying device is used for performing dust removal, desulfurization and dehydration on the coarse coal gas; the chromatographic column separation device is used for separating all the gas components; the conversion device is used for converting carbon dioxide and carbon monoxide; the detector and the data processing unit are used for realizing qualification and quantification. According to the detection method for quickly measuring the components of the coarse coal gas, multi-chromatogram combined calculation is carried out by taking methane as a bridge, so that the contents of all the components can be obtained by one step. The detection method and the device have the advantages of low equipment cost, short detection period, high measurement precision and wide application range.

The invention provides a carbon dioxide measurement kit. The carbon dioxide measurement kit mainly comprises the following components: 50 to 200mM of a buffer solution, 10 to 50% of a stabilizer, 0.1 to 5% of a surface active agent, 0.1 to 5g/L of a preservative, 1 to 20mM of a reaction accelerator, 2 to 10mM of 3-acetylpyridine adenine dinucleotide (reduction type), 5 to 50g/L of phosphoenolpyruvic acid, 50 to 500U/L of phosphoenolpyruvate carboxylase, and 1 to 3KU/L of malate dehydrogenase; a recycling system of 3-acetylpyridine adenine dinucleotide (reduction type) comprises (1) 2 to 20g/L of glucose substrate, (2) 100 to 2,000U/L of corresponding glucose dehydrogenase, and (3) 1 to 5mM of 3-acetylpyridine adenine dinucleotide. The carbon dioxide measurement kit is convenient to use and simple to operate; the components participating in coupling reaction are extra added, so that no pollution caused by endogenous and allogenic substances are introduced; the rate of the recycling system is below the main reaction rate, thus the main reaction cannot be interfered; the carbon dioxide measurement kit is high in stability and can be used for a long time.

The invention discloses a greenhouse carbon dioxide concentration monitoring system based on a computer, which is characterized by comprising a carbon dioxide concentration sensor, a temperature sensor, a numerical value processing unit, a light sensor and a control unit, wherein the temperature sensor is connected with the first input end of the numerical value processing unit; the output end of the carbon dioxide concentration sensor is connected with the second input end of the numerical value processing unit; the output end of the numerical value processing unit is connected with the first input end of the control unit; the output end of the light sensor is connected with the second input end of the control unit; and according to data of the light sensor, the control unit controls a carbon dioxide cylinder to output a flow and carries out concentration overload alarming. A carbon dioxide concentration compensation and temperature relationship curve is acquired, and according to the acquired carbon dioxide measurement concentration and the carbon dioxide compensation value, an equivalent carbon dioxide concentration is acquired; and finally, according to the carbon dioxide concentration and the light information, the output flow of the carbon dioxide cylinder is controlled, and the purpose of precisely controlling the carbon dioxide in the greenhouse is achieved.

A method (200) for measuring a patient's expired CO₂ level in a non-invasive ventilator system (100) while maintaining a positive inspiratory pressure. The method includes the steps of: receiving (220), by the non-invasive ventilator system, a signal comprising an instruction to obtain a CO₂ measurement from a patient; lowering (230), by the non-invasive ventilator system in response to the signal, the expiratory positive airway pressure from a first, higher level to a second, lower level for a first time period comprising one or more breaths; obtaining (240), by a CO₂ sensor (160), a CO₂ measurement during the first time period; and returning (250), after the first time period, the expiratory positive airway pressure to the first, higher level.

The invention relates to the measurement field of carbon dioxide, in particular to a fluorinated aromatic hydrocarbon polymer capillary tube gas-permeable membrane sample cell which comprises (1) a sleeve, (2) a fluorinated aromatic hydrocarbon polymer capillary tube, (3) a first sample inlet tube and a second sample inlet tube, (4) a first optical liquid coupling device and a second optical liquid coupling device as well as (5) a first tracer agent tube and a second tracer agent tube, wherein the left and the right sides of the sleeve are respectively provided with an injection hole and a discharge hole; the length of the fluorinated aromatic hydrocarbon polymer capillary tube is longer than that of the sleeve; the capillary tube is inserted into the sleeve from the left end, and is inserted out of the sleeve from the right end; the first sample inlet tube is connected with the injection hole of the sleeve, and the second sample inlet tube is connected with the discharge hole of the sleeve; the first optical liquid coupling device is provided with a three-end joint, and the second optical liquid coupling device is also provided with a three-end joint; and the first tracer agent tube is connected with a second joint of the first optical liquid coupling device, and the second tracer agent tube is connected with a second joint of the second optical liquid coupling device. Compared with the prior art, the invention has high sensing sensitivity and large dynamic range, and is very suitable for researching and developing a CO2 partial pressure field measuring instrument with high accuracy, rapid response and low power consumption.

The invention discloses a CO2 concentration detection method with main-flow-type water vapor influence reduction, wherein a three-channel pyroelectric sensor is employed and includes a CO2 measurement channel, a reference channel and a water vapor measurement channel. The method comprises the following steps: determining peak values and valley values of all terminals according to data collected in the three channels; extracting voltage peak values of the water vapor measurement channel and the reference channel, calibrating a wave form formed by subtracting the two voltage peak values to obtain the voltage peak values corresponding to different water vapor concentrations; extracting the voltage peak values of the CO2 measurement channel and the reference channel, calibrating the wave form by subtracting the two voltage peak values to obtain the voltage peak values corresponding to different CO2 concentrations with the water vapor influence; obtaining a fitted curve of the voltage peak values corresponding to different CO2 concentrations without the water vapor influence; and performing real-time measurement. The method can increase measurement precision of CO2.

The invention relates to a portable Beidou environment detector which is composed of an antenna module, an information processing board, a PM2.5 module, a formaldehyde module, a carbon dioxide module,a display and control unit, a power module, and a battery module. Compared with the prior art, the portable Beidou environment detector has the advantages of high positioning accuracy, high accuracyof PM2.5, formaldehyde and carbon dioxide measurement, timing service, and the like, and can be widely applied to indoor and outdoor environment detection, outdoor navigation and fields needing time unification.

The invention provides a blood flow velocity calculation method and device, terminal equipment and a storage medium. The blood flow velocity calculation method and device, the terminal equipment and the storage medium are applicable to the technical field of computers. The blood flow velocity calculation method includes the steps that measurement values of end-expiratory carbon dioxide of a sampleto be measured at each time are acquired; coordinates of each preset position of blood vessels are acquired according to a preset vascular geometric model of the sample to be measured; according to the measurement values of the end-expiratory carbon dioxide at each time, a preset dynamic model, a preset physiological model of the sample to be measured and coordinates of the positions of blood vessel outlets, boundary conditions of each time are calculated; and the boundary conditions of each time and the coordinates of each preset position of the blood vessels are input into the dynamic modelto calculate the blood flow velocity of each preset position of the blood vessel at each time. According to the blood flow velocity calculation method and the device, the terminal equipment and the storage medium, the physiological model of blood flow is combined with the geometric model of blood flow to calculate the blood flow velocity, and the accuracy of the calculation results is ensured.

The invention discloses an oxygen mask with a carbon dioxide diagram monitoring port, and relates to the technical field of the oxygen mask. The oxygen mask with the carbon dioxide diagram monitoring port comprises a mask body. The left and right sides of the mask body are opened with connecting holes. Two sides of the mask body are connected with elastic belts by the connecting holes. The middle part of the outer wall of the mask body is connected with an oxygen hose locking head. The outer wall of the oxygen hose locking head is connected with an oxygen conveying pipe. The outer circle of the oxygen hose locking head is uniformly opened with air holes. The bottom of the outer wall of the mask body is connected with a carbon dioxide detecting port. The outer wall of the carbon dioxide detecting port is connected with a carbon dioxide conveying pipe. The left end of the mask body is covered by a rubber soft cushion. The oxygen mask with the carbon dioxide diagram monitoring port is capable of, through a carbon dioxide measurer, measuring the content of the carbon dioxide in the mask body and displaying in a display unit, and sending an alarm by an audible and visual alarm while the data of the carbon dioxide content exceeds the preset value. The humanization is better.

A medical breathing carbon dioxide detection system comprises light source and an air chamber, the air chamber is used for gas (to be measured) to pass through, and the light source is used for illuminating the air chamber to form an optical path. And further comprises a chopping wheel disk, a motor, a detector and a processor, the chopping wheel disk is provided with a plurality of measurement windows, one of which is used for encapsulating the standard gas with known concentration, the motor is used for driving the chopping wheel disk which is arranged on the optical path, the single opticalpath is divided into a plurality of measurement channels; the detector is used for acquiring the signal on the measurement channels and sending the signal to the processor for processing; the processor is also used for controlling the light source. Due to a plurality of measurement channels require only one detector, the cost is reduced, when performing zero point correction, the standard gas with known concentration is accorded with without the introduction of external air as the zero reference point, the impact of the zero deviation caused by external zero reference gas on the measurementis avoided, the operation free of zero correction function is realized, and the stability of the measurement is improved.

A capnograph device (10) includes a carbon dioxide measurement component (20) and an electronic processor (30) programmed to generate a capnogram (40) comprising carbon dioxide level sample values measured as a function of time. End-tidal carbon dioxide (etC02) is determined from the capnogram, and an etC02 parameter quality index (etC02 PQI) (44) is computed using one or more quantitative capnogram waveform metrics computed from the capnogram. A respiration rate (RR) value is also determined from the capnogram, and a RR PQI (46) computed using the RR value and the etC02 PQI. A respiratory well-being index (RWI) (50) may be computed from the etC02 and RR values and the etC02 and RR PQI values. In some embodiments the one or more capnogram waveform metrics are computed from a capnogram histogram generated from the capnogram.