46 results about "Carbon dioxide monitor" patented technology

The invention relates to a soil carbon dioxide concentration monitoring device and method. The soil carbon dioxide concentration monitoring device comprises drill bits, carbon dioxide concentration probes, temperature and humidity probes, a power supply module and a data acquisition unit. The drill bits drill out drill holes for burying the carbon dioxide concentration probes and the temperature and humidity probes respectively in soil. The data acquisition unit is connected with the carbon dioxide concentration probes and the temperature and humidity probes through data lines, and the monitoring data of the carbon dioxide concentration probes and the temperature and humidity probes are preserved. The power supply module is connected with the carbon dioxide concentration probes, the temperature and humidity probes and the data acquisition unit through wires. The soil carbon dioxide concentration monitoring device and method have the advantages that monitoring data are accurate and stable, disturbance to soil is lowered to the minimum, the soil carbon dioxide concentration of a certain depth can be monitored, the probes are protected, influences on monitoring of continuous rainfall are avoided, the soil carbon dioxide concentration monitoring device can conduct soil monitoring continuously in tropical regions and subtropical regions for a long time, a display meter is added, power is supplied through batteries, the soil carbon dioxide concentration can be fast measured outdoors, and the soil carbon dioxide concentration monitoring device has the advantages of being quick in response, high in accuracy, free of reagent supply and the like.

Provided is a device to facilitate carbon dioxide sampling in the exhalation breath of a person comprising a single nasal prong (10) insertable into a nostril of the person having a first lumen (20) which allows gas passage from the nostril to the surrounding external air, a second lumen (34) located within the first lumen (20). A tube (40) is connected at a first end (42) to an end of the second lumen (34) that is further from the nostril and connectable at a second end (44) to a carbon dioxide monitoring device (50). The carbon dioxide monitoring device (50) detects the level of carbon dioxide in the portion of the person's exhalation that passes through the second lumen (34). The portion of the person's exhalation that passes through the first lumen (20) is dispersed in the surrounding air.

The invention relates to an air passage block and an end-expiratory carbon dioxide monitoring module manufactured by adopting the same. In the invention, an air outlet chamber communicated with a vacuum pump component and an air inlet chamber communicated with a carbon dioxide concentration measurement component are arranged in an air passage block body; the air outlet chamber is provided with anair hole communicated with the outside by two parts, the air inlet chamber is provided with an inner side air hole communicated with the outside by two parts respectively and an outer side air hole communicated with the outside by one part, and the outer side of the outer side air hole is also provided with a blind hole which is communicated with the outside by two parts and is not communicated with the air inlet chamber; and a connecting pipe used for generating pressure drop is arranged between the air outlet chamber and the air inlet chamber. As complicated pipeline connection is omitted, the pressure and the flow rate loss of gas expired by a patient is reduced when being transmitted in the monitoring module, and the measurement of carbon dioxide expired by the patient is more accurate. By arranging the connecting pipe used for generating pressure drop, a pressure difference is provided to measure the flow rate, and the whole structure and the installation are simplified. A pressure difference sensor adopts the connection of a flexible PCB plate and a main PCB plate, which obviously saves the space; the vibration damping performance of the vacuum pump component is reliable.

The invention discloses a highway engineering atmospheric-environment carbon-dioxide monitoring method. The method is characterized in that a carbon-dioxide monitoring device is employed for highway engineering atmospheric-environment carbon-dioxide monitoring; The device comprises an air collection port (1), an air inlet (2), a carbon-dioxide equipment box (3), a light receiving element (4), a first air exhausting port (5), a first fan motor (6), a first air exhausting pipeline (7), a second air exhausting pipeline (8), a second fan motor (9), a second air exhausting port (10), an infrared illuminating element (11), an absorbing plate (12), a first air exhausting passage (13), a second air exhausting passage (14), a data collection storage system and a power supply system; and the first air exhausting pipeline (7) has an automatic filtering function. The method can realize a self-cleaning function of equipment under a condition of heavy carbon-dioxide pollution. Independent measurement of carbon-dioxide concentration can be carried out, and vehicle-mounted-mobile-type measurement of the carbon-dioxide concentration can also be carried out.

A portable tidal capnogram recording device of the present invention relates to the field of medical equipment and physiological signal monitoring, comprising a circuit board equipped with a microprocessor, a power management module electrically connected to the circuit board, and a carbon dioxide monitoring module connected to the circuit board , the carbon dioxide monitoring module includes a breathing mouthpiece, an airway connected to the airway of the breathing mouthpiece, a monitoring unit connected to one end of the airway, and an air suction pump connected to the monitoring unit through a rubber hose. The air suction pump communicates with the power management module through a microcontroller It is electrically connected, and by adjusting the suction flow of the air pump, the carbon dioxide detector can be easily applied to different groups of people for monitoring; by setting the temperature detection monitoring module and the heating module, it can effectively prevent water vapor condensation and further improve the accuracy of concentration detection sex.