126 results about "Monitoring oxygen" patented technology

Methods and apparatus for monitoring oxygen saturation levels in tissue are disclosed. According to one aspect of the present invention, a sensor arrangement for use in an optical imaging system includes a first source structure, a second source structure, and a detector arrangement. The first source structure provides a first beam of light and the second source structure provides a second beam of light. The detector arrangement includes detector structures that have centerpoints, and receives the first and second beams of light after the first and second beams of light are reflected off of an external surface. The detector arrangement is arranged to define a first axis that passes through the centerpoint of each detector structure, and a distance from a centerpoint of the first source structure to the first axis is not equal to a distance from a centerpoint of the second source structure to the first axis.

A sensor and system using the sensor for detecting an analyte, where the sensor includes an amorphous fluorinated polymer and a luminescent metal-ligand complex is provided. Sensor systems for monitoring oxygen in environments containing volatile organic solvents are also provided.

The present invention relates to compositions comprising a core and a hydrophobic coating material surrounding the core. The core comprises at least one oxygen-sensing particle. The present invention also relates to methods of detecting and monitoring oxygen in a sample using the microencapsulated oxygen-sensing particles.

Positioning of the distal end of a catheter at a desired location, for example, in the desired atrium of a patient's heart, can be determined or verified through measurement of blood gas values proximate to the distal end. In one embodiment, an oximeter is used to monitor oxygen saturation, for example, to distinguish between de-oxygenated venous blood and well-oxygenated arterial blood. Optical signals may be transmitted to the distal end of the catheter and received therefrom via optical fibers. Specifically, a catheter (300) has a number of optical fiber ends (308, 310 and 312) disposed at a distal end (304) thereof. A first fiber end (310) transmits the red and infrared optical signals. Fiber ends (308 and 312) are used for detecting reflected optical signals. The optical signals are then processed by a detector and an oximeter instrument to provide oxygen saturation readings that can indicate the position of the distal end of the catheter within the patient's heart or successful penetration of the interatrial septum.

The invention relates to a treatment quality management method of a breathing machine. The method comprises: step one, monitoring flowing speed and waveform information of a pipe of a breathing machine; step two, monitoring pressure and waveform information in the pipe of the breathing machine; step three, monitoring oxygen concentration information in an oxygen channel and/or breathing machine pipe; step four, monitoring oxygen flow information in the oxygen channel and sending the information to a cloud and a monitoring terminal; step five, monitoring blood oxygen saturation and pulse rate information in blood of a breathing machine user and sending the information to the cloud and the monitoring terminal; step six, monitoring CO2 pressure dividing information in alveolar of the breathing machine user or a CO2 waveform of an exhalation end in a breathing machine pipe line and sending the monitored information to the cloud and the monitoring terminal; and step seven, monitoring comparison of the terminal and a preset threshold value and determining whether treatment of the breathing machine is normal. With the method, the overall progress is improved based on real-time monitoring of feedback of equipment data and patient data.

The invention discloses an oxygen concentration detector, which belongs to the technical field of gas concentration detection. The invention aims to solve the problems that the prior oxygen detector based on spectrum technology has high cost due to using a single-mode diode laser and the output wavelength is sensitive to temperature change. An output end of a signal generator of the oxygen concentration detector is connected with an input end of a drive unit; an output end of the drive is connected with an input end of a tunable multimode diode laser; output light of the tunable multimode diode laser is transmitted by a collimating lens to form parallel light; the parallel light is split into transmitted light and reflected light through a spectroscope; the transmitted light passes through a sample cell, then is incident onto a first focusing lens for focusing and then incident onto a first photoelectric detector; the reflected light is taken as reference light and is incident onto a second photoelectric detector at last; two paths of light signals are converted into electric signals and then are input into a computer through an A/D converter; medium in the sample cell is oxygen to be tested; and the central wavelength of the tunable multimode diode laser is 760nm. The oxygen concentration detector is used for monitoring oxygen concentration.

Methods and apparatus are disclosed for measuring and mapping oxygen tension in a tissue and, in particular, permit direct non-invasive measurement of retinal tissue oxygen tension. In one aspect, the invention is directed to methods for determining oxygen tension in a target tissue sensitized with an oxygen sensitive probe by imaging the target tissue. In one embodiment, the invention provides a noninvasive method for monitoring oxygen tension in a chorioretinal tissue sensitized with an oxygen sensitive probe. In another aspect, apparatus is disclosed that can determine oxygen tension in tissue by quantifying a signal emitted by an oxygen sensitive probe within the three-dimensional map of a tissue to determine oxygen tension and provide a three-dimensional map of oxygen tension variations.

The invention relates to an intelligent vehicle-mounted safety device. The intelligent vehicle-mounted safety device comprises a temperature monitoring module, an oxygen monitoring module, a life detection module, a vehicle condition monitoring module, a communication module and a control module. The life detection module is used for detecting whether a life body is in a vehicle or not. The vehicle condition monitoring module is used for monitoring whether the vehicle is in a flameout state or not and whether there is anyone on a driving position or not. The temperature monitoring module is used for monitoring the temperature in the vehicle. The oxygen monitoring module monitors oxygen concentration in the vehicle. Under the situation that the vehicle is in flameout, no one in the driving position and the fact that it is detected that there is a life body in the vehicle, when the temperature and/or the oxygen concentration in the vehicle exceed the set safety range, the control module judges that someone is trapped in the vehicle and sends an alarm signal to a designated mobile number through the communication module. The intelligent vehicle-mounted safety device can accurately judge whether someone is trapped in the vehicle or not, the safety of trapped personnel can effectively guaranteed, meanwhile, rescue messages with positioning information of the vehicle can be automatically send, and timely rescue is facilitated.

The invention provides a method for exploiting a heavy oil reservoir by strengthening in-situ oil combustion. The method includes: arranging a vertical injection-production well pattern including an injection well and a production well in an exploiting area of the heavy oil reservoir; lighting oil layers by means of chemical ignition or electric ignition; continuously injecting air from the vertical injection well to maintain combustion; continuously exploiting through the production well; injecting 1-3m<3> of hydrogen peroxide slug 30-50% in mass concentration when every 100000-150000Nm<3> of air is injected in the injection well, and alternately injecting in this way; and closely monitoring oxygen content and temperature of gas produced by the production well, and timely adjusting slug injection parameters. Hydrogen peroxide rapidly decomposes at high temperature in the oil layers, so that a large amount of heat and oxygen is provided for oil layer combustion, strengthened combustion is achieved, heavy oil combustion rapidly and favorably crosses a low-heat area to enter a high-temperature combustion area, and continuous oil combustion exploiting is achieved.

The invention relates to the field of automobile manufacture, in particular to a child hypoxia protection device started by in-car impact for a passenger car. The child hypoxia protection device comprises a control system, an in-car oxygen monitoring system, a critical oxygen content alarm system and an emergency disposal system. When parking time exceeds 30 minutes and car doors and windows are closed tightly, an in-car impact control device is used for starting the child hypoxia protection device after receiving impact of a child in the car. The control system is used for making a comparison between monitored oxygen content and the critical oxygen content after receiving data on oxygen content monitored by the in-car oxygen monitoring system in a real-time manner. When the oxygen content in the car reaches or below the critical oxygen content, the critical oxygen content alarm system is started and the emergency disposal system is started as well. Therefore, life safety of the child locked in the car is effectively ensured.

A portable hand-held oxygen monitor for monitoring oxygen in a weld zone includes a user interface having an alphanumeric display and one or more user interface buttons. An audiovisual alarm includes an indicator light and an audio output device, the indicator light being separate and distinct from the alphanumeric display. The oxygen monitor implements an oxygen monitoring mode responsive to activation of one or more of the user interface buttons, wherein (1) a gas sample is obtained, (2) a digital gas sample oxygen level value is generated, and (3) the gas sample oxygen level value is compared to a stored oxygen level alarm value, and the audiovisual alarm is activated if the gas sample oxygen level value is less than the oxygen level alarm value. The activating includes illuminating the indicator light and generating sound from the audio output device to alert a monitor user that is safe to weld.

The invention provides a spectrum analyzing method of on-line detecting the particle size distribution of inclusions in the steel. On the nitrogen condition, make predischarge and formal spark discharge between the metal sample and electrode pair, make light split analysis on metal element and inclusion-monitor oxygen element, use data processor to make programming and calculating processing on the spectrum data to calculate the total strength of the inclusions, calculate out the contain of the inclusions in the sample according to the preset inclusion strength-content correcting curve, calculate out the particle size distribution of the inclusions according to the weight difference of the sample excited before and after, according to 10 measured results of the particle size distribution and by extremum statistical method, calculate the maximum particle size of the inclusions. It controls refining course according to the detecting result, thus remarkably reducing the rejection quantity caused by the inclusions and enhancing the steel quality. It is applied to analysis on the particle size distribution of the inclusions in the steel such as Al2O3, SiO2, MnO, CaO and MnS.

The invention discloses a pipeline monitoring system which solves the problem of difficulties in real-time monitoring of existing systems, inaccurate information acquisition, and high operation and maintenance costs. The system comprises resistance probes, temperature sensors, humidity sensors, potential sensors, a main control module and a power module; the resistance probes are installed on theinner and outer wall surfaces of the pipeline to monitor the long-term corrosion loss of the pipeline; the temperature sensors are evenly distributed along the circumference of the pipeline wall aboutthe axis of the pipe; the humidity sensors are evenly distributed around the pipeline wall along the pipe centerline for detecting pipeline corrosion risks; the potential sensors are evenly distributed around the pipeline wall along the pipeline center line to monitor oxygen absorption corrosion and external stray current corrosion on the outer wall of the pipeline; the main control module is used to obtain the data returned by the resistance probes, the temperature, humidity, and potential sensors and perform monitoring; the power module is used to supply power to the main control module. The pipeline monitoring system realized by the invention effectively solves the problem of real-time monitoring of pipeline corrosion conditions.

The invention provides a spectrum analyzing method of on-line detecting the number and content of inclusions in the steel. On the nitrogen condition, make predischarge and formal spark discharge between the metal sample and electrode pair, make lighting and light split analysis on the metal element and oxygen element, research and determine the critical value of metal element inclusion strength and that of inclusion-monitoring oxygen element strength, find out the abnormal pulse of metal element of each critical value of inclusion strength, and determine the number of the inclusions. By data processing and in comparison with the preset correcting curve of inclusion strength and content, determine and analyze the content of the inclusions in the sample. It can analyze the element content and fast analyze the content of inclusions in the sample, samples and detects the number and content of the inclusions in the refining procedure and controls the refining technique according to the detecting result, thus remarkably reducing the rejection quantity caused by the inclusions and enhancing the steel quality. It is applied to analysis on the number and content of the inclusions in the steel such as Al2O3, SiO2, MnO, CaO and MnS.

The invention provides a device for monitoring the oxygen state inside an automobile. Under the condition that an automobile control device judges whether the automobile stops or runs according to the automobile running speed value transmitted by an automobile speed detection device and an automobile air conditioner device is started according to a user construction, a gas concentration detection device can enter the starting state so as to detect the concentration of oxygen O2 inside the automobile and transmit the detected oxygen concentration value to the automobile control device; the automobile control device starts a warning information transmitting device when the oxygen concentration value received by the gas concentration detection device is lower than a set concentration threshold value so that the warning information transmitting device can transmit warning information and send reminding information to a remote user terminal in a wireless communication mode. The invention provides the device which can prevent or reduce safety accidents caused when people rest or sleep in the automobile while an air conditioner is turned on after the automobile is parked.

The invention relates to a breathing machine oxygen concentration control method. The breathing machine oxygen concentration control method comprises steps of obtaining the target oxygen flow velocity of a breathing machine, controlling the opening degree of a proportioning valve to be in a critical valve opening state, obtaining the monitored oxygen flow velocity on the opening degree, calculating a target current value based on the target oxygen flow velocity and the monitored oxygen flow velocity, adjusting the opening degree of the proportioning valve based on the target current value, obtaining the monitored oxygen flow velocity on the adjusted opening degree, determining whether the target oxygen flow velocity is consistent with the monitored oxygen flow velocity or not, calculating a target current value based on the target oxygen flow velocity and the monitored oxygen flow velocity when the target oxygen flow velocity is not consistent with the monitored oxygen flow velocity, otherwise, maintaining the opening degree of the proportioning valve. Under a non-constant pressure, the oxygen concentration can be controlled. In addition, the invention also provides a breathing machine oxygen concentration control device and system, by employing the breathing machine oxygen concentration control system without a pressure-reducing valve, the size and weight of the breathing machine oxygen concentration control device are reduced, and the breathing machine oxygen concentration control device and system are applied to breathing machines which are high in portability.

The invention discloses a system and method for monitoring oxygen at the furnace exit of a circulating fluidized bed boiler. The system comprises a coal feeding quantity detecting device used for detecting the quantity of coal entering the boiler from a furnace entrance, an air volume detecting device used for detecting the total air volume supplied to the boiler, a coal calorific value measuring device used for measuring the calorific value of the coal fed into the boiler, and a data processing device used for figuring out the oxygen at the furnace exit by utilization of the coal feeding quantity, the total air volume and the calorific value of the coal, so as to perform accurate and well dynamic monitoring on the oxygen at the furnace exit.