73 results about "Oxygen Measurement" patented technology

The invention discloses a method and a device for measuring the proportional oxygen concentration of a wood-based composite oxygen sensing material, and relates to the field of oxygen measurement. The technical problems that how to utilize wood to be compounded with metalloporphyrin, overcome the influence of excitation light source power on a test result and improve the anti-interference capability and stability of a sensor and the oxygen concentration test range in the prior art are solved. According to the invention, balsa wood is taken as a wood-based material, and metalloporphyrin Gd-HMME is embedded into the balsa wood, so that under the excitation of an ultraviolet laser, the ratio of a fluorescence signal to a phosphorescence signal of the wood-based composite material is taken as an optical parameter, and the oxygen concentration test is realized. The method is also suitable for the field of sensor preparation.

The invention relates to the technical field of biomedical engineering, and discloses a blood oxygen saturation degree detection method which comprises the following steps: S1, a multi-wavelength light source is utilized to irradiate a target area, and the light source comprises light with different wavelengths in a visible spectrum range; s2, collecting intensity information of light reflected or transmitted by the tissue; s3, constructing an oxyhemoglobin saturation model according to the received light intensity ratios under different wavelengths, and further provides an oxyhemoglobin saturation detection device which comprises a multi-wavelength light source module used for emitting light with different wavelengths in a visible spectrum range; and the optical sensor array is used for collecting the intensity information of the light reflected or transmitted by the skin tissue. By means of the multi-wavelength light source, machine learning optimization, personalized calibration and the environment sensing module, the accuracy and stability of blood oxygen measurement are remarkably improved, different individual differences and complex environment conditions can be adapted, and accurate blood oxygen saturation monitoring is ensured.

The invention relates to the technical field of blood oxygen monitoring and early warning, in particular to a blood oxygen saturation monitoring and early warning system and method based on an oximeter. The method comprises the following steps: determining physiological information in two states by analyzing historical bracelet data of a user in a motion state and a resting state, screening out a body part which is most suitable for detection of an oximeter based on a measurement position difference for data acquisition, then calculating a recovery speed of blood oxygen fluctuation of the user, simulating a blood oxygen fluctuation range according to the recovery speed, and calculating the recovery speed of the blood oxygen fluctuation of the user. Therefore, a reasonable interval of blood oxygen change is determined, finally, the interval serves as an early warning reference, an abnormal alarm is triggered when the real-time blood oxygen data exceed a set range, and accurate and dynamic blood oxygen monitoring and health management are achieved. According to the method, the blood oxygen measurement position is optimized by analyzing motion and resting data, a dynamic early warning interval is established in combination with a fluctuation rule, and accurate blood oxygen abnormity monitoring and early warning are achieved.

The invention belongs to the technical field of oxygen content detection and dynamic calibration, and particularly relates to a dynamic calibration method for the oxygen content in a boiler air and flue gas system. The method comprises the steps of multi-working-condition data acquisition and standardization processing, failure feature extraction and feature library establishment, reference oxygen calculation model construction, data driving model construction, anomaly detection and calibration, parameter self-updating and the like, and a calibration effect real-time evaluation link is newly added. The core of the method is that a mechanism + data dual-drive mode is adopted, a reference model is constructed on the basis of a zirconia sensor Nernst equation, an improved bidirectional LSTM network is fused to construct a data drive model, and an adaptive threshold algorithm and a multi-stage calibration strategy are combined to realize accurate recognition and dynamic calibration of abnormal signals. The method is adaptive to a complex flue gas environment and a variable load operation scene, the oxygen content measurement precision is remarkably improved, low-nitrogen combustion and environmental protection compliance are guaranteed, coal consumption and operation cost are reduced, and reliable data support is provided for intelligent power plant digital transformation.

The present invention relates to a breathing device (2) comprising: an air inlet (10) designed to supply ambient air to the breathing device (2); an oxygen inlet (8) designed to supply oxygen to the breathing device (2); a mixing section (34) designed to receive ambient air from the air inlet (10) and oxygen from the oxygen inlet (8), mix the ambient air and oxygen, and output oxygen-enriched air as a ventilation airflow into a ventilation airflow path (39); an oxygen regulating valve (30) disposed between the oxygen inlet (8) and the mixing section (34) and enabling regulation of the flow rate of oxygen entering the mixing section (34) from the oxygen inlet (8); and an integrated combined sensor (60) designed to measure the thermal conductivity, pressure, temperature, and humidity of the ventilation airflow downstream of the mixing section (34), and to determine the oxygen content of the ventilation airflow based on the measured pressure, measured temperature, and measured humidity, and to provide the oxygen content as a measurement result. The breathing device (2) also has a monitoring device (66) which is designed to: receive measurement results provided by oxygen measuring devices (32, 40a, 40b), ventilation gas pressure sensor (45), ventilation gas temperature sensor (42) and / or ventilation gas humidity sensor (43) and integrated combination sensor (60); compare the measurement result of the oxygen content in the ventilation flow received from the integrated combination sensor (60) with a predefined oxygen content in the ventilation flow; and control the oxygen regulating valve (30) to regulate the oxygen content in the ventilation flow if the measurement result of the oxygen content in the ventilation flow received from the integrated combination sensor (60) is different from the predefined oxygen content in the ventilation flow.

The utility model provides an underwater oxygen measuring device which comprises a first shell and a second shell, the first shell is in threaded fit with the second shell, a waterproof breathable film and an erecting platform are arranged in the first shell, the waterproof breathable film is arranged on one side of the first shell, and the erecting platform is arranged on the other side of the first shell. The erecting platform is arranged in the middle of the first shell, an oxygen measuring instrument is arranged on the erecting platform, a platform sealing gasket is arranged between the oxygen measuring instrument and the erecting platform, and a temperature sensor is arranged at one end of the oxygen measuring instrument; by adopting the spherical shell, stress is more balanced, water pressure can be effectively borne, and devices in the shell are protected; and the threads and the polytetrafluoroethylene sealing gasket are adopted, so that the sealing performance can be kept while the water pressure is effectively borne.

A wearable device with a blood oxygen measurement function, comprising: at least one light source, configured to emit light; an optical sensor, configured to sense an optical signal generated according to reflected light of the light; a pressure sensor, configured to sense a pressure provided by a user wearing the wearable device; a processing circuit, configured to calibrate the optical signal to generate a calibrated optical signal, and configured to compute a blood oxygen level according to the calibrated optical signal; and a pressure adjusting structure, configured to adjust an internal wearing space of the wearable device, wherein the pressure changes corresponding to the internal wearing space. A blood oxygen measurement method which the wearable device can use is also disclosed. Thereby the optical signal may be calibrated corresponding to the state of the wearable device. By this way, the blood oxygen measurement may be more accurate.

The utility model relates to a garbage incinerator oxygen supply device which comprises a blending assembly, an oxygen measuring sensor and a control system, the oxygen measuring sensor is electrically connected with the control system, the control system is electrically connected with the blending assembly, the oxygen measuring sensor comprises a shell, a filtering part and a detecting element, and the shell is provided with a detecting channel; the filtering part and the detection element are both located in the detection channel, the detection channel is provided with a detection opening, the detection opening is exposed to the outside of the garbage incinerator oxygen supply device, and the filtering part is located between the detection opening and the detection element; the garbage incinerator oxygen supply device comprises a moving part, a cleaning part and a driving assembly used for driving the moving part to move, the moving part is slidably connected to the shell in the direction from the detection element to the filtering part, the cleaning part is connected with the moving part, and the cleaning part is used for penetrating through filtering holes of the filtering part. The oxygen measurement sensor has the effect that an operator can conveniently clean the filtering part, so that the detection precision of the oxygen measurement sensor is improved.

An oxygen measurement device includes a catheter including a flexible hollow shaft, the flexible shaft having an open port configured to allow urine from a bladder to flow into the open port, and a urinary passage in communication with the open port configured to discharge the urine; and an oxygen sensor including an oxygen sensor main body capable of detecting oxygen in the urine, the oxygen sensor being disposed in the catheter and configured such that the oxygen sensor main body is in contact with the urine flowing in the urinary passage.

This invention provides an interventional guidewire device for measuring intravascular oxygen saturation, belonging to the field of interventional surgical medical device technology. The guidewire device includes a guidewire body, a first oxygen measurement unit, and a second oxygen measurement unit. The guidewire body has a filamentous structure with a distal end and a proximal end. The first oxygen measurement unit is positioned at a predetermined distance from the distal end of the guidewire body and is used to measure oxygenation data at the distal end of the thrombus. The second oxygen measurement unit is positioned proximal to the first oxygen measurement unit and spaced at a predetermined distance from it, and is used to measure oxygenation data at the proximal end of the thrombus. During operation, the distal end of the guidewire body passes through the thrombus, with the first oxygen measurement unit positioned at the distal end of the thrombus and the second oxygen measurement unit positioned at the proximal end of the thrombus to measure oxygenation data at both ends of the thrombus. This invention primarily addresses the technical problem in existing technologies where it is impossible to assess oxygenation levels at the proximal and posterior ends of the thrombus before mechanical thrombectomy.

The invention discloses a wearable device with a blood oxygen measuring function and a blood oxygen measuring method, and the wearable device comprises a light source which is used for emitting light; an optical sensor for sensing an optical signal generated according to a reflected light of the light; the pressure sensor is used for sensing the pressure provided by a user wearing the wearable device; a processing circuit for correcting the optical signal to generate a corrected optical signal and for calculating a blood oxygen level according to the corrected optical signal; the pressure adjusting structure is used for adjusting the internal wearing space of the wearable device, and the pressure is changed along with the change of the internal wearing space. Therefore, the optical signal can be adjusted corresponding to the state of the wearable device, so that the blood oxygen measurement is more accurate.

The invention discloses an optical dissolved oxygen measurement system and method, and belongs to the technical field of measurement of dissolved oxygen in a water body. The system comprises a front-end detection assembly and a circuit module. The front-end detection assembly comprises double sensitive membranes which are exposed to a to-be-detected water body and are adaptive to different concentrations; the double excitation light sources excite the corresponding sensitive films to generate fluorescence; the fluorescence receiving unit receives the fluorescence and converts the fluorescence into an electric signal; the reference light receiving unit is used for receiving scattered light of the double excitation light sources and converting the scattered light into electric signals; the temperature sensor is used for collecting water temperature. The circuit module comprises a variable light intensity driving unit for adjusting the excitation light intensity; the signal conditioning unit is used for carrying out amplification, filtering and analog-to-digital conversion on the electric signal; and the signal processing unit is used for inverting the dissolved oxygen concentration by controlling a sampling time sequence, shifting a sequence by 90 degrees, shifting phases, calculating a phase difference through a digital orthogonal phase-locking amplification algorithm and combining temperature compensation. The optical dissolved oxygen measurement system and method provided by the invention can realize high-precision stable measurement of dissolved oxygen in a wide concentration range.

The invention discloses a dissolved oxygen analysis instrument and an analysis method, and particularly relates to the field of oxygen measurement. Comprising a sub-region division step, a sub-region analyzer information acquisition step, a sub-region data standardization processing step, a sub-region analyzer comprehensive analysis step, a target region analyzer comprehensive analysis step, an analyzer comprehensive judgment step and an interactive feedback step. According to the method, the target area is comprehensively monitored in real time through accurate area division, and multi-dimensional information including dissolved oxygen concentration, temperature, instrument performance and the like is collected. Based on the data, a comprehensive evaluation model is constructed and is used for comprehensively measuring the overall performance of the dissolved oxygen analysis instrument. The method not only improves the monitoring fineness, but also promotes the evaluation of instrument efficiency from multiple dimensions, and effectively enhances the operation efficiency and quality of the dissolved oxygen analysis instrument.

The utility model relates to the field of oxygen measurement, and discloses an oxygen concentration measuring device with a filtering function, which comprises a filtering valve seat, a filter and an oxygen sensor, and the filtering valve seat is provided with an air inlet and a first airflow channel; an inlet of the filter is communicated with the air inlet; and an inlet of the oxygen sensor is communicated with an outlet of the filter through the first airflow channel. The device has the beneficial effects that the filter is arranged to filter moisture and other impurities in the reflow furnace, so that the filtered airflow enters the first airflow channel from the outlet of the filter and then enters the oxygen sensor from the first airflow channel for oxygen content detection; moisture and other impurities in the reflow furnace are prevented from entering the oxygen sensor, and the quality and the service life of the oxygen sensor are ensured.

The present application discloses an oxygen sensor, an oxygen measuring device and method for a petrochemical tank area, and belongs to the field of sealing measurement of petrochemical tank areas. It includes a shell and a U-shaped detection body; the U-shaped detection body includes a double-material beam and a single-material beam; there are at least two double-material beams, including a base beam and a film layer plated on the upper surface of the base beam, the base beam is made of a first material, and the film layer is made of a second material, and the thermal expansion coefficients of the first material and the second material are different; there are at least two single-material beams, which are made of a third material; the double-material beam and the single-material beam are alternately connected in sequence, and at least two double-material beams are arranged in parallel, and at least two single-material beams are arranged in parallel, and the head end and the tail end are both double-material beams, so that the single-material beam and the double-material beam form a U-shaped shape; the end of the double-material beam at the end that is away from the single-material beam is fixed in the shell; the shell is provided with an inlet and an outlet to allow gas to enter and exit. The present application has high sensitivity, a low detection limit, and a fast response speed.

The present invention discloses a portable blood oxygen analysis device for mobile health examination, relates to the field of blood oxygen analysis devices, and comprises a support unit, which is composed of a support airbag that can adapt to different arms and a support plate for supporting the support airbag; a blood oxygen analysis unit arranged at one end of the support unit; the present invention can not only compare the contents of deoxyhemoglobin and oxygenated hemoglobin detected under red light and infrared light of different wavelengths by switching the blood oxygen detection component, but also detect other hemoglobins, such as carboxyhemoglobin, so as to meet the user's demand for higher-precision blood oxygen measurement, and the coordinated use of the blood oxygen detection component and the adaptive component can not only make the elastic pad fit the detection finger more closely, but also limit the detection finger, which can effectively avoid inaccurate detection results caused by random movement of the finger, and further improve the detection accuracy.

The invention provides a blood oxygen simulation method and system, electronic equipment and a storage medium, and relates to the technical field of blood oxygen measurement, the blood oxygen simulation method comprises the following steps: acquiring an initial light signal of blood oxygen measurement equipment, and determining a light emitting time sequence parameter of the initial light signal; according to the light-emitting time sequence parameters, advance time quantum is set, and a synchronous trigger signal is generated at a time point of the advance time quantum before the starting time by taking the starting time of the blood oxygen measuring equipment at the next light signal receiving window as a reference; in response to the synchronous trigger signal, calling preset blood oxygen model data, and generating a driving current synchronous with the light-emitting time sequence parameter in real time; the light source assembly is driven through the driving current, and analog light pulses are emitted to the blood oxygen measuring equipment. Accurate mapping from an electric signal to an optical signal is achieved, and the overall accuracy of blood oxygen simulation is remarkably improved.

The present application relates to the technical field of dissolved hydrogen and oxygen measurement, and particularly relates to a multifunctional flow cell device suitable for a hydrogen and oxygen sensor and a use method, comprising: a flow cell, comprising a cell body, the cell body is further provided with a water inlet and a water outlet; a three-way valve, comprising a near-water part, a far-water part and a side connection part, the near-water part is connected with the water inlet, the far-water part is arranged between the near-water part and the side connection part, and the far-water part is used for connecting a sampling pipeline or a drainage pipeline; a cleaning agent pool, provided with a medicament pool and a waste liquid pool, the medicament pool is connected with the water outlet, and the waste liquid pool is connected with the water inlet; a variable-diameter quick connector; and a bidirectional water pump. The variable-diameter quick connector is arranged at the water inlet and the water outlet, the specification can be quickly replaced according to the site, the size mismatching problem of the pipeline of the traditional flow cell is solved, a backwashing flow path is constructed, the sensor membrane contamination and aging problems are effectively relieved, the service life of the sensor electrode is prolonged, the personnel exposure risk is reduced, and the equipment downtime is reduced.

The present invention discloses a method for intelligently determining the timing of temperature measurement and oxygen determination during the RH refining process of ultra-low carbon steel. The method specifically comprises the following steps: (1) during the RH treatment process of the molten steel, sequentially determining the temperature measurement and oxygen determination times of the molten steel at the time of entering the station, during decarburization, before the end of decarburization, after oxygen supplementation before the end of decarburization, after the end of deoxidation, and before RH air breaking; and (2) issuing a temperature measurement and oxygen determination prompt after the temperature measurement and oxygen determination times are reached. The present invention provides a method for determining the temperature measurement and oxygen determination times during RH refining of ultra-low carbon steel, quantitatively determining the timing of temperature measurement and oxygen determination during RH refining of ultra-low carbon steel, improving the level of on-site standardized operations, and enhancing the accuracy of molten steel temperature and composition control.

The invention relates to the technical field of gas concentration detection, and provides a paramagnetic principle-based oxygen concentration detection alarm device, which comprises a shell, a gas sampling module, a paramagnetic oxygen sensor module, a signal processing module, a main control module, a power supply module, a communication module and an alarm module, the paramagnetic oxygen sensor module comprises a detection shell and a paramagnetic oxygen measuring assembly arranged in the detection shell. According to the oxygen concentration detection and alarm device based on the paramagnetic principle, all the modules are integrated on one shell, so that the oxygen concentration detection and alarm device is compact in structure, high in function integration degree and smaller in size, and follow-up installation is facilitated; through the arrangement of the paramagnetic oxygen sensor module, the oxygen concentration detection alarm device is higher in detection precision, higher in environmental adaptability and stability and longer in service life, and the pain points that a traditional oxygen detection alarm is short in service life and the failure period is difficult to predict are improved.

The present application relates to the technical field of reactor, and particularly provides a liquid heavy metal purification device, aiming at solving the problems of inaccurate oxygen concentration measurement and slow regulation speed. For the purpose, the purification device comprises a container, a heat exchange assembly, an oxygen measurement and control assembly, a filter assembly, a driving pump and a warning assembly. The heat exchange assembly is arranged in a first area of the container and used for precipitating first impurities in the liquid heavy metal. The oxygen measurement and control assembly is arranged in a second area of the container and used for measuring and regulating the oxygen concentration. The filter assembly is arranged in a third area of the container. The driving pump is arranged in a fourth area of the container. The warning assembly is arranged on the driving pump and used for warning the impurity content according to the change of the content of second impurities in the liquid heavy metal. The purification device of the present application realizes accurate measurement and rapid regulation of the oxygen concentration by using the oxygen measurement and control assembly, and realizes impurity content warning according to the change of the solubility of the second impurities by using the warning assembly, thereby effectively ensuring the safe operation of the reactor.

The invention relates to an energy-saving and environment-friendly self-pumping type oxygen measuring probe for optimizing combustion of an industrial boiler, which comprises a zirconium oxide measuring element, a stainless steel protective cover, a ceramic thermal insulation layer, a ceramic electric heater, a temperature thermocouple and the like, one end of the zirconium oxide measuring element is closed, the other end of the zirconium oxide measuring element is of an open structure, a measuring electrode and a reference electrode are arranged at corresponding positions of the inner wall and the outer wall of the middle section of the zirconium oxide measuring element, a reference gas heat convection channel and a measured gas measuring channel are arranged in the measuring system, and when gases with different oxygen concentrations pass through the inner side and the outer side of the zirconium oxide measuring element, electromotive force is generated. The ceramic filter can prevent dust and impurities in the flue gas from scouring and corroding the measuring electrode and causing aging and falling of the measuring electrode, and also has a damping effect on the measured gas, so that the flow of the reference gas and the flow of the measured gas are relatively consistent, and the standard and the requirement of the zirconium oxide oxygen measurement technology on the gas flow are met.

The present invention belongs to the technical field of dissolved oxygen measurement, and discloses a calibration device for a dissolved oxygen analyzer used to measure dissolved oxygen in water bodies or liquids. The device includes an analyzer, a connecting line is arranged on one side of the analyzer, a detection probe is arranged at one end of the connecting line, a storage tank is arranged on one side of the analyzer and on the side of the connecting line, a fixing frame is arranged on the front side of the storage tank, a support block is fixedly installed at the top of one side of the fixing frame, one end of the connecting line is located at the bottom of the support block, a storage tank is arranged on the front side of the fixing frame, a placement seat is arranged at the bottom of the storage tank, and a connecting pipe is fixedly installed on one side of the storage tank. By supporting and fixing both the upper and lower ends of the detection probe, the stability of the detection probe is improved, and when adjusting the placement position and depth of the detection probe, the probe is not placed stably and shakes, which may lead to unstable detection signals and affect the measurement results, facilitating the improvement of the accuracy and precision of the calibration of the detection probe.

The invention discloses an oxygen concentration detection system and method, a storage medium and an electronic device, and relates to the technical field of smart home, the oxygen concentration detection system comprises an oxygen measurement bin, a first oxygen concentration detection sensor, a second oxygen concentration detection sensor and a processor; wherein a bottom air inlet of the oxygen measuring bin is communicated with an air outlet of the oxygen generator, the first oxygen concentration detection sensor and the second oxygen concentration detection sensor are both located in the oxygen measuring bin, and the distance between the first oxygen concentration detection sensor and the bottom air inlet of the oxygen measuring bin is smaller than a first preset threshold value; the distance between the second oxygen concentration detection sensor and the top air outlet of the oxygen measuring bin is smaller than a second preset threshold value; wherein the processor is connected with the first oxygen concentration detection sensor and the second oxygen concentration detection sensor and is used for determining the concentration of oxygen generated by the oxygen generator according to detection data of the first oxygen concentration detection sensor and detection data of the second oxygen concentration detection sensor.

A kind of calibration-free, maintenance-free zirconium oxide analyzer, including outer sleeve, fixed flange, zirconium oxide sensor, electric heater, temperature sensor, internal resistance test module, background potential test module, zirconium oxide analyzer out-of-tolerance test module and oxygen measurement calculation control module, fixed flange is sealingly fixed and installed at the end of outer sleeve, zirconium oxide sensor is coaxially arranged in outer sleeve and sealingly fixedly connected in the middle of inner end of fixed flange, electric heater is coaxially arranged between zirconium oxide sensor and outer sleeve and fixedly connected on the inner wall of outer sleeve end, temperature sensor is arranged in the inner end of zirconium oxide sensor.The present application can determine whether zirconium oxide analyzer is accurate in whole life cycle without calibration and maintenance, solve the problem that current zirconium oxide analyzer needs frequent calibration, reduce maintenance cost, and is maintenance-free in whole life cycle of zirconium oxide analyzer.

1. The name of the design product: heart rate and blood oxygen measurement dynamic graphical user interface of electronic device and its heart rate and blood oxygen measurement module. 2. The use of the design product: the design product is used in an electronic device. 3. The design points of the design product: the graphical user interface. 4. The picture or photo that best indicates the design points: design 1 front view. 5. Design 1 is designated as the basic design. 6. The use of the graphical user interface: the interface is mainly used for the interactive interface of heart rate and blood oxygen measurement; the local appearance of the interface is used for the heart rate and blood oxygen measurement module. Design 1 front view is an initial interface of the device detecting that the user measures heart rate and blood oxygen (such as the user correctly placing the sensing finger on the relevant sensor), and the interface changes from design 1 front view interface to design 1 interface change state diagram 1 after entering the heart rate and blood oxygen measurement state, and then changes dynamically and cyclically in design 1 interface change state diagram 1-18, and design 1 front view interface and design 1 interface change state diagram 1-18 are key frame interfaces in the change process. The human-computer interaction of designs 2-4 is the same as that of design 1. 7. Other circumstances that need to be explained: designs 1-2 of the design are local appearance designs, and the appearance shown in the yellow covered area in the view is not required to be protected. The designs 2 and 4 of the claimed design require protection of color.

The invention belongs to the technical field of dissolved oxygen measurement, and particularly relates to an online dissolved oxygen sensor assembly which comprises a sensor, a membrane head is mounted at the bottom of the sensor, a flushing device is arranged on one side of the sensor, and a detection assembly is arranged at the bottom of the sensor. The detection assembly comprises a sleeve arranged below the sensor and a chassis arranged on the bottom surface of the sleeve; an interception space is constructed through a sleeve and a base plate, liquid to be detected is intermittently intercepted around a membrane head, the contact time of the liquid and the membrane head is prolonged, dissolved oxygen is assisted to be fully diffused, and the detection accuracy is guaranteed; the inner pipe is driven to rotate, so that the nozzle rotates around the circumference of the film head for washing.

The present invention relates to an exhaust gas oxygen measurement device provided to measure oxygen in exhaust gas discharged from a semiconductor process and the like, and an exhaust gas oxygen measurement system having same. According to the present invention, the exhaust gas oxygen measurement system comprises an exhaust gas oxygen measurement device, and the exhaust gas oxygen measurement device comprises: a pipe connection body, which is provided on an exhaust pipe and has connection ports at both sides thereof; an oxygen measurement sensor, which is provided at a one-side connection port side of the pipe connection body so as to emit light, thereby measuring an oxygen concentration with reflected light; a reflection device provided at the other-side connection port side of the pipe connection body so as to reflect the light emitted from the oxygen measurement sensor; a protection member composed of a first protection member for protecting the oxygen measurement sensor from exhaust gas and a second protection member for protecting the reflection device; and an exhaust gas blocking member composed of a first blocking valve and a second blocking valve that are provided to open and close the connection ports at both sides.

The utility model relates to the technical field of blood oxygen measuring sensors, and provides a multifunctional fingernail type blood oxygen measuring sensor which comprises a first fingerstall and an adjusting structure. According to the utility model, the adjusting structure is arranged, a finger is placed in the placing groove, then the second fingerstall is pressed to enable the rack to slide downwards in the sliding groove, and the rack is in meshed connection with the gear, so that the gear is driven to enable the rotating shaft to rotate in the downward sliding process of the rack; the gear is driven to rotate, the gear limits the rack through teeth, it is guaranteed that the rack can stop and be fixed to a certain position, the device can be suitable for fingers of different thicknesses, meanwhile, the first fingerstall and the second fingerstall are connected through the connecting spring, and therefore the first fingerstall and the second fingerstall form a telescopic structure; therefore, the first fingerstall and the second fingerstall can be prevented from squeezing fingers to affect precision, practicability is achieved, and the multifunctionality of the fingernail type blood oxygen measuring sensor is improved.

A ventilation device for ventilating a patient with an air inlet; an oxygen inlet; a mixing area; an oxygen measuring device to determine the oxygen content of a ventilation gas stream; and / or a pressure sensor to determine the pressure of the ventilation gas stream; and / or a temperature sensor to determine the temperature of the ventilation gas stream; and / or a humidity sensor to determine the humidity in the ventilation gas stream; and with an integrated combination sensor to measure a thermal conductivity, a pressure, a temperature and a humidity of the ventilation gas stream, to determine an oxygen content of the ventilation gas stream from the measured thermal conductivity taking into account the pressure, the temperature and the humidity, and to make the oxygen content, the pressure, the temperature and the humidity thus determined available;and with a monitoring device which is designed to compare the measurement results provided by the oxygen measuring device, the pressure sensor, the temperature sensor, and / or the humidity sensor with the corresponding measurement results provided by the integrated combination sensor and to output an alarm signal if at least one of the measurement results differs by more than a predetermined maximum difference value from the corresponding measurement result of the integrated combination sensor.;