807 results about "Carbon dioxide sensor" patented technology

A capnograph which performs an analysis of the breath waveforms measured by the carbon dioxide sensor, interprets the results of this analysis, and outputs to the operator diagnostic information about the respiratory status of the patient, or about the adequacy of the breathing support provided to the patient. The instrument compares a number of parameters characteristic of the waveforms of the patient's breath with an internal library of the values of those parameters expected from normal waveforms stored in its memory. These parameters may either relate to specific features of the waveform in the time domain, or may characterize spectral components of the waveform in the frequency domain. The capnographic waveform analysis may be combined with further non-invasive measurements in order to provide an indication of the deviation of the value of EtCO₂ from PaCO₂.

A fuel control system for a gas turbine engine that includes a primary fuel circuit, a fuel tuning circuit, a plurality of combustors connected to the fuel tuning circuit, oxygen and carbon dioxide sensors in the exhaust stream and a feedback control loop operatively connected to the fuel tuning circuit and to the oxygen and carbon monoxide sensors which serve to control the precise amount of fuel and air being fed to each one of the plurality of combustors in the engine. A parallel array of control valves in a tuning fuel circuit connect to corresponding ones of the plurality of combustors in the gas turbine engine. The fuel control system thereby “fine tunes” the amount of fuel and air being fed to each combustor using data regarding the detected oxygen and carbon monoxide concentrations in the exhaust gas as provided through a feedback control loop.

An emergency life support system including a patient ventilator for mechanical breathing assistance; a capnograph to monitor CO₂ for ventilation effectiveness; a pulse oximeter for measuring blood stream oxygen saturation; a carbon dioxide sensor; an electrocardiograph (ECG) to monitor cardiac performance; an infusion pump; and alarms and a data recorder. The preferred embodiment uses an oxygen generator to deliver oxygen, to generate electric power to run the ventilation system, and to warm IV fluids and resuscitated air. The generator has electronically controlled valves and a modified valve system that offers the ability to select the oxygen concentration in the air delivered to the patient.

A capnometer adaptor includes a nanostructure sensor configured to selectively respond to a gaseous constituent of exhaled breath, such as to carbon dioxide. The sensor may be provided as a compact and solid-state device, and may be adapted for a variety of respiratory monitoring applications.

A carbon oxide sensor having high sensitivity capable of reduction of influence of humidity is provided. A detection electrode and a counter electrode are provided on one side of an electrolyte, respectively. The detection electrode contains a metal oxide and a metal carbonate including plural components. The metal carbonate preferably contains a first component of alkali metal carbonate and a second component of at least one element selected from the group consisting of alkali earth metal carbonate, transition metal carbonate, zinc carbonate, cadmium carbonate, indium carbonate, lead carbonate and bismuth carbonate. Specifically, it is preferable to contain the first component including Li2CO3 and the second component including at least one element selected from the group consisting of BaCO3, CaCO3 and SrCO3.

The invention discloses an intelligent household control system, which includes a central control host computer and a user terminal, wherein the central control host computer is electrically connected with a camera, an infrared detector, a temperature and humidity sensor, an indoor floating sensor, an outdoor floating sensor, a carbon dioxide sensor, a brightness detector and a plurality of actuating mechanisms, wherein the user terminal in the intelligent household control system is communicated with the central control host computer through a home gateway, the home gateway serving as the core part of the intelligent household control system is integrated into an independent control software, and the user can achieve the real-time monitoring image through the camera by adopting the user terminal and utilizing the wired/ wireless Internet network or the wireless mobile network as the information medium, so as to know the operation states of the appliances at any time to remotely control the appliances in the system and automatically manage all the things in the house.

Improved carbon dioxide sensors are disclosed which are less sensitive to the moisture content of the environment and which are substantially insensitive to oxygen levels under normal working conditions. The CO₂ sensor comprises a pH indicator and long-lived reference luminophore and a porous sol-gel matrix. Combined CO₂ and O₂sensors are also described. Further disclose are methods of printing sensor onto substrates.

The invention discloses a big data analysis based intelligent greenhouse control system and method. The system includes an air temperature and humidity sensor, a light intensity sensor, a carbon dioxide sensor, a soil temperature and humidity sensor, an equipment driving module, a CC2530, a ZigBee/WiFi gateway, a cloud server and a network camera; the air temperature and humidity sensor, the light intensity sensor, the carbon dioxide sensor and the soil temperature and humidity sensor are used for collecting the environment information of a greenhouse; the equipment driving module is used for adjusting the environment parameters of the greenhouse; the network camera is used for collecting the growth pictures of crops in the greenhouse; the CC2530 sends a control instruction to the equipment driving module; the equipment driving module transmits the control instruction to a ventilating fan, a sprinkling irrigation facility and a light supplementary lamp/light shading curtain, so that the environment parameters in the greenhouse can be adjusted; and the cloud server determines the growth demands of the crops according to the collected crop growth pictures, an information processing decision system and a convolutional neural network model. Through the growth environment demands of the planted crops analyzed based on big data and equipment that can automatically control and adjust the environment parameters according to the growth environment demands of the crops, manpower costs can be greatly saved, and the output of the crops can be enhanced.

The present invention relates to indoor air quality control equipment by utilizing ventilation system and its method. Its control equipment includes ventilation system and air purifier. Said ventilation system can be used for sucking outdoor air and discharging indoor air to implement indoor ventilation, and the air purifier can utilize filter system to raise indoor air quality. Its control method utilizes the devices of carbon dioxide sensor, dust sensor and gas sensor, etc. and adopts the measures of detecting carbon dioxide concentration and detecting indoor air pollution extent, etc. Besides, it also provides the concrete steps of said control method.

The invention discloses a control method of a vehicle-mounted air conditioner and the vehicle-mounted air conditioner. The method includes the steps that a compartment is divided into a plurality of areas, a temperature sensor, a carbon dioxide sensor and a fan are installed in each area, and an external temperature sensor is installed in the position, away from a heat source, of the exterior of the compartment; after a vehicle is started, the air conditioner is started and the operating mode is determined according to the vehicle exterior environmental temperature detected by the external temperature sensor; the air speed gears of the fans in the corresponding areas are adjusted according to the carbon dioxide concentrations, detected by the carbon dioxide sensors, of all the areas; the set temperature is adjusted according to the current operating mode and the air speed gears of the fans in all the areas; and when the temperature sensor detects that the temperatures of multiple areas reach the set temperature, the air conditioner starts the shutdown mode, and the fans are kept at the current air speed gear. According to the control method of the vehicle-mounted air conditioner and the vehicle-mounted air conditioner, interior temperature and exterior temperature of the compartment are identified through the sensors, and the operating modes of the air conditioner are selected automatically; the number of passengers of different areas is judged based on the carbon dioxide concentrations in the vehicle, the air outlet volume is adjusted according to the areas, the requirements of passengers for cooling and heating are met anytime, and accordingly the comfort is improved.

The invention discloses an in-car retention early warning adjusting system and method. The in-car retention early warning adjusting system comprises a detecting part, a control treatment part and an executing part. The in-car retention early warning adjusting system is characterized in that the detecting part is installed at a roof lamp and comprises a temperature sensor, a carbon dioxide sensor, a radar wave sensor and a sound sensor; an exploring port of the radar wave sensor is perpendicular to the ground, the exploring angle is adjusted to be in the mode that within a radar wave detecting range, radar waves do not transmit out of car windows while the radar waves cover seats; the sound sensor is internally provided with a capacitive electret microphone sensitive to sound, and the control treatment part comprises a single chip microcomputer, signal filter magnifying modules and an adjusting button; the single chip microcomputer is connected with the sensors of the detecting part one by one through the signal filter magnifying modules, and after signals detected by the sensors of the detecting part and signals input by the adjusting button are processed, grading control is conducted on the executing part. The in-car retention early warning adjusting system has the characteristics that the structure is simple, in-car retention organisms can be effectively stored, and the in-car environment comfort is intelligently adjusted and controlled.

A fire detector and method for generating an alarm signal in response to a fire uses an NDIR CO₂ sensor to generate a detector signal based upon a 15μ absorption band of CO₂ and generates an alarm signal when a signal processor receives the detector signal and a preselected criterion is met that is indicative of the onset of a fire based upon an analysis of the detector signal using a detection algorithm that relies upon a trending pattern of the detector signal such as recognizing a substantial drop in the detector signal strength. The NDIR CO₂ sensor can also generate a reference detector signal based upon a 9.0μ neutral band with a FWHM=0.5μ while the signal processor utilizes a detection algorithm that is based upon a synchronized output signal representative of CO₂ concentration to generate an alarm signal when a preselected criterion indicative of the onset of a fire is met.

The invention discloses an indoor air quality intelligent control system, which comprises a fresh air unit, a circulation unit and a mixing unit, wherein the fresh air unit is provided with a first fresh air fan, an auxiliary heater, a fresh air filter and a second fresh air fan, the circulation unit is provided with a circulation air filter and a circulation fan, the mixing unit is used for realizing the mixing of outdoor fresh air and indoor circulation air, electromagnetic purification modules are respectively arranged in the fresh air filter and the circulation air filter, all modules are respectively connected onto a driving circuit, the driving circuit is connected with a main controller, and an air quality sensor, a temperature and humidity sensor, a PM2.5 sensor, a carbon dioxide sensor, a press key input circuit and an LCD (liquid crystal display) display circuit are respectively connected onto the main controller. The indoor air quality intelligent control system has the effects that the regulation and control of the outdoor fresh air and the indoor circulation air are integrated, the structure of the system is simple and novel, the arrangement is compact, the installation is convenient, the treatment on the indoor air can be realized, the air quality can be ensured according to requirements, the harm to human bodies caused by outdoor pollution can be reduced, and the energy consumption is reduced.

The invention discloses a sensor group indoor air monitoring system, and belongs to the field of air monitoring. The indoor air monitoring system comprises a central processing unit, wherein the input end of the central processing unit is electrically connected with a data acquisition unit and a body controller through serial port lines; the input end of the data acquisition unit is electrically connected with a converter; the input end of the converter is electrically connected with the output ends of a carbon monoxide sensor, a formaldehyde sensor, a carbon dioxide sensor, a nitrogen dioxide sensor, a VOC (volatile organic compound) sensor, a temperature sensor and a humidity sensor respectively; and the output end of the central processing unit is electrically connected with a controller, an alarm and a video terminal through serial port lines respectively. The indoor air monitoring system uses multiple sensors to simultaneously detect multiple air data; the air quality is precisely displayed through the video terminal, and a user is reminded of paying attention to pollutant overdischarge in time through the alarm; a mobile terminal can realize remote control and monitoring; and manual calibration can be performed through a calibrator in case of inaccurate sensor measurement, thereby ensuring that the result is more accurate.