680 results about "Oxygen sensor" patented technology

The invention provides a multi-source data fusion modeling method and system in an aeration process, and is applied to the field of intelligent aeration control in sewage treatment. The method comprises the steps that multi-source time sequence data such as dissolved oxygen, turbidity, flow, temperature, power and pool bottom pressure pulsation signals are collected, dissolved oxygen response lag is calculated through cross-correlation analysis with power change as the reference, time sequence alignment is carried out, and a dissolved oxygen reference interval is predicted by utilizing calibration data in combination with a physical constraint LSTM model; performing spectral analysis on the pressure pulsation signal to extract a gas-liquid coupling characteristic value, and generating a cooperative regulation instruction of the frequency of the blower and the rotating speed of the stirrer based on the information; by means of the scheme, control oscillation caused by lag of the dissolved oxygen sensor can be effectively overcome, online monitoring of bubble form distribution is achieved, the gas-liquid mass transfer efficiency is improved, invalid aeration is avoided, and system energy consumption is remarkably reduced on the premise that stable effluent quality is guaranteed.

The invention provides a method for solving signal drift of an oxygen sensor in a high-temperature and high-pressure environment, which comprises the following steps: collecting acid-base gas concentration data and zirconium oxide material surface state information in the high-temperature and high-pressure environment, and classifying erosion sensitivity degrees by adopting a support vector machine algorithm to obtain an initial response characteristic deviation value; a neural network model is adopted to process the determined potential signal drift trend and oxygen content detection historical data, a simulation response characteristic curve is generated, and a quantitative mapping relation of the pH value change to erosion sensitivity is obtained; refining the correlation between the determined long-term monitoring reliability index and the pH value change by adopting a neural network model, generating a dynamic response characteristic prediction sequence, and obtaining a signal drift suppression threshold set; and through fusion of the obtained signal drift suppression threshold set and the oxygen content detection real-time signal, if it is judged that erosion sensitivity is aggravated in a prediction sequence, a compensation model is activated to update and circulate, and optimized sensor stable output is obtained.

The invention relates to the field of dies, in particular to a front oxygen sensor support stamping die structure which comprises a fixed die and a movable die, and a punching mechanism, a bending mechanism, a rim charge cutting mechanism and a discharging mechanism are sequentially arranged between the fixed die and the movable die in the conveying direction of a material belt. The punching mechanism is used for punching various holes in different shapes and positions in a material belt, the rim charge cutting mechanism is used for accurately cutting off rim charges, the bending mechanism is used for gradually bending the material belt of a plane structure into the shape of a product, and the discharging mechanism is used for conveying the machined product out of a die. The wear rate of the contact surface of the mold is reduced.

A method of using a fire suppression system includes maintaining an inert atmosphere in a chamber; enclosing a pyrophoric workpiece in the chamber; sensing a chamber temperature within the chamber with a temperature sensor; sensing a chamber oxygen concentration within the chamber with an oxygen sensor; comparing the chamber temperature to a predetermined temperature and comparing the chamber oxygen concentration to a predetermined oxygen concentration; dispensing an antipyrophoric material onto the workpiece within the chamber if the chamber temperature meets or exceeds the predetermined temperature or if the chamber oxygen concentration meets or exceeds the predetermined oxygen concentration.

The embodiment of the invention provides a continuous blood oxygen monitoring system in extracorporeal circulation and a control method thereof. The continuous blood oxygen monitoring system comprises a vein sensor, an artery sensor, a blood flow sensor, an oxygen sensor, a carbon dioxide sensor, a controller and a display, the vein sensor monitors the vein blood oxygen saturation degree; the artery sensor monitors arterial oxygen saturation and hematocrit; the blood flow sensor monitors the blood flow of the artery pipeline; the oxygen sensor monitors the oxygen concentration of the oxygenator; the carbon dioxide sensor monitors the carbon dioxide concentration of the oxygenator; the display provides an interaction control, responds to a trigger operation acting on the interaction control, sends an interaction instruction to the controller, and updates information displayed in an interaction interface according to the control of the controller; the controller receives the interaction instruction and executes processing corresponding to the interaction instruction; the processing includes controlling display information of the display; the display information comprises information corresponding to the monitoring parameters. The scheme ensures the safety and effectiveness of the treatment process.

The invention discloses a local space oxygen enrichment control system and method based on an oxygen selective permeable membrane, belongs to the technical field of air purification, environment control and membrane separation, and aims to solve the problems that the indoor oxygen concentration cannot be actively and efficiently increased and compact integration is difficult in the prior art. The system integrates an outdoor fresh air fan, a switching valve, an oxygen enrichment membrane device, an air pump, an indoor air return and supply fan, a gas monitoring control unit, an outdoor exhaust fan and the like, and a control unit dynamically regulates and controls a switching valve passage, the rotating speed of each fan and start and stop of the air pump according to the difference between oxygen sensor data and preset target oxygen concentration; air selectively passes through the oxygen-enriched membrane device to generate oxygen-enriched air or is fed into a room through a bypass air path, and the indoor oxygen concentration is actively stabilized at 21%-26%. The system is suitable for local spaces such as residences and offices, active oxygen enrichment and environment control can be achieved, the air quality is improved, and meanwhile low energy consumption, safety and comfort are taken into account.

A system may include a flow valve coupled to a gas inlet of a landfill gas system and a pump coupled to the flow valve and configured to draw gas from the landfill gas system via the gas inlet. The system may further include an oxygen sensor comprising at least one laser configured to detect oxygen concentration in the gas, a carbon dioxide sensor comprising at least one infrared light source configured to detect carbon dioxide concentration in the gas, and / or one or more chemical sensors configured to sense concentrations of a respective one or more chemicals in the gas. A microprocessor may determine sensed data including at least the oxygen concentration, the carbon dioxide concentration, concentrations of the one or more chemicals, the static pressure, the atmospheric pressure, and / or a differential pressure, and communicate the sensed data to a mobile control device.

The invention discloses an auxiliary device for hydrogen production by water electrolysis, which relates to the technical field of hydrogen production by water electrolysis and is characterized by comprising a base frame, a water inlet pretreatment unit, an electrolysis unit, a gas-liquid separation and gas monitoring module and an intelligent operation regulation and control unit. The inlet water pretreatment unit is used for deeply purifying a water source through a multi-stage filtering device to produce deionized water meeting the electrolysis requirement; the electrolysis unit electrolyzes the purified water into a gas-liquid mixture of hydrogen, oxygen and water vapor; the gas-liquid separation and gas monitoring module adopts a vertical separation structure and a secondary separation system, and is combined with a hydrogen side oxygen sensor and an oxygen side hydrogen sensor to realize efficient gas-liquid separation and real-time gas purity monitoring; the intelligent operation regulation and control unit dynamically regulates electrolysis parameters and gas pipeline states based on monitoring data, and automatic closed-loop control is achieved. The device has the advantages of thorough water purification, high gas purity, safe and reliable operation, intelligent control and the like.

The invention discloses an oxygen sensor error compensation method and system based on physical information constraint. The method comprises the steps that the output voltage U of a TDLAS oxygen sensor and the temperature T and pressure P of the environment where the TDLAS oxygen sensor is located are obtained; a pre-trained oxygen sensor error compensation network model constrained by physical information based on three monotonic relations of temperature T, pressure P, output voltage U and oxygen concentration C is input to obtain the oxygen concentration C after error compensation, and the oxygen sensor error compensation network model is pre-trained to learn the input temperature T, pressure P and output voltage U; and the mapping relation between the output oxygen concentration C after error compensation. The invention aims to realize nonlinear error compensation with good generalization ability and robustness for the TDLAS oxygen sensor so as to overcome the influence of temperature drift, aging effect and the like of the TDLAS oxygen sensor and improve the measurement accuracy of the TDLAS oxygen sensor in a complex environment.

The invention provides a vehicle control method and system, a vehicle and a storage medium, and the method comprises the steps that when the temperature of a downstream switch oxygen sensor is smaller than the dew point temperature, an engine control unit determines the target maximum allowable rotating speed and the target maximum allowable torque of an engine according to the water temperature of the engine, a working condition coordination request is sent to the hybrid power control unit; and the hybrid power control unit controls the engine and the motor to enter a series connection mode according to the working condition coordination request, and controls the maximum allowable rotating speed of the engine to be smaller than or equal to the target maximum allowable rotating speed and the maximum allowable torque of the engine to be smaller than or equal to the target maximum allowable torque. Therefore, the actual rotating speed of the engine does not exceed the target maximum allowable rotating speed, and the actual torque of the engine does not exceed the target maximum allowable torque. The temperature of the engine in the combustion process can be reduced, generation of harmful substances in originally discharged waste gas is reduced, and therefore the emission performance of the vehicle is improved to a certain degree.

The invention belongs to the technical field of granary access control, and particularly relates to an intelligent granary access control system which comprises an environment sensing module, an identity recognition module, a processing control module and an execution and feedback module. The environment sensing module is used for collecting environment parameter data at the entrance of the granary in real time and comprises a phosphine sensor, an oxygen sensor and a carbon dioxide sensor; according to the invention, by fusing the technical characteristics of the hydrogen phosphide sensor, the oxygen sensor and the carbon dioxide sensor, the environmental safety is comprehensively evaluated, and compared with the dependence of a single sensor, the accuracy and reliability of environmental state judgment are remarkably improved, and the occurrence of false alarms and missing alarms is effectively prevented. Due to the fact that a control logic process of'absolute priority of environmental safety 'is adopted, the technical characteristic ensures that personnel safety is put at the first place under any condition, which is a core guarantee of high safety of the system, and the effect of the system is directly reflected as protection of life safety.

The invention relates to the field of electrochemical signal processing, and particularly discloses a wearable detection circuit for an electrochemical oxygen sensor, comprising: a transimpedance amplification module comprising an analog switch S1 and at least two feedback resistors with different resistance values, the feedback resistors being connected in parallel, the analog switch S1 being connected in series with the feedback resistors, the control circuit is used for controlling a feedback resistor connected to the circuit and outputting a first voltage signal; the active low-pass filtering module is used for filtering the first voltage signal and filtering thermal noise, power frequency interference and motion artifact noise to obtain a second voltage signal; the temperature calibration module is used for collecting temperature information; the microcontroller is used for providing driving voltage for the transimpedance amplification module and the active low-pass filtering module and receiving the temperature information and the second voltage signal; the microcontroller is used for receiving the second voltage signal and comparing the second voltage signal with a preset value. The technical scheme of the invention is high in precision and low in power consumption, and can reduce environmental interference.

The invention relates to the technical field of engines, and provides a liquid ammonia engine mechanism and a control method and system. The liquid ammonia engine structure comprises a liquid ammonia supply structure which is communicated with the inlet end of a high-pressure ammonia rail through a pipeline; the high-pressure ammonia rail is connected with the cooling structure, and liquid ammonia in the high-pressure ammonia rail exchanges heat with cooling liquid of the cooling structure for cooling; a liquid ammonia temperature sensor is also arranged on the high-pressure ammonia rail; the outlet end of the high-pressure ammonia rail is communicated with the high-pressure liquid ammonia nozzle through a pipeline; the high-pressure liquid ammonia nozzle atomizes high-pressure liquid ammonia into tiny liquid drops and then sprays the tiny liquid drops into the combustion chamber; a cylinder pressure sensor is arranged at the top of the combustion chamber; an oxygen sensor is arranged on the exhaust pipeline; the system further comprises an ECU module. The ECU module carries out dynamic decision making through a preset sub-working-condition control strategy on the basis of the operation working condition of an engine and obtained monitoring data. The problem that the actual injection amount is reduced due to the liquid-gas entrainment phenomenon in the liquid ammonia conveying process is solved.

The invention relates to the technical field of ocean observation, in particular to a hydrate reservoir information in-situ monitoring device. Comprising a monitoring box body; a metal grating plate is arranged at the bottom of the monitoring box body, and hydrate reservoir sediments can enter the monitoring box body through grating holes in the metal grating plate; a dissolved oxygen sensor, a pH sensor, a Raman probe rod and a resistivity probe rod are sequentially arranged in the monitoring box body from top to bottom, and a water tank camera is arranged on the side wall of the monitoring box body; a plurality of annular electrodes are arranged on the resistivity feeler lever in the circumferential direction of the feeler lever at intervals, and each annular electrode is connected with an annular electrode distance adjusting mechanism and an annular electrode aperture adjusting mechanism. And in-situ monitoring of the hydrate reservoir can be realized.

The invention relates to the technical field of rubber materials, and discloses fluororubber for a high-temperature oxygen sensor and a processing technology of the fluororubber. The processing technology comprises the following steps: S1, preparing fluorinated modified methyl vinyl silicone rubber from methyl vinyl silicone rubber and 1H, 1H, 2H, 2H-perfluorodecanethiol; s2, preparing glycerol modified silicone rubber from methyl vinyl silicone rubber and 1-thioglycerol; taking glycerol modified silicone rubber, adding into a mixed solvent of tetrahydrofuran and water, uniformly stirring, adding urea, heating, dropwise adding phosphoric acid, carrying out heat preservation reaction, removing the solvent, and drying to obtain phosphate modified methyl vinyl silicone rubber; and S3, adding the broken fluororubber, the fluorinated modified methyl vinyl silicone rubber and the phosphate modified methyl vinyl silicone rubber into an open mill, uniformly mixing, adding the composite filler and magnesium oxide, mixing, adding the vulcanizing agent and the assistant crosslinking agent, uniformly mixing, and vulcanizing to obtain the fluororubber for the high-temperature oxygen sensor.

The application relates to a lead-free oxygen sensor, comprising: a housing; the electrode assembly comprises a working electrode, a reference electrode and a counter electrode which are arranged in sequence; the air inlet channel is used for providing a channel for external oxygen to enter the accommodating cavity to be in contact with the working electrode; the first gas outlet channel is used for providing a channel for transmitting oxygen generated by the electrode to the outside; the second gas outlet channel is used for providing a channel for transmitting oxygen generated by the electrode to the outside; wherein the first air outlet channel is provided with a first oxygen permeation membrane, and the second air outlet channel is provided with a second oxygen permeation membrane; the air permeability of the first oxygen permeable membrane is greater than that of the second oxygen permeable membrane. The internal oxygen concentration is maintained by controlling the oxygen outlet speed of the first gas outlet channel and the second gas outlet channel, so that the internal gas pressure balance is ensured while the side reaction is inhibited and the current is balanced, and the oxygen generated by the counter electrode does not permeate into the working electrode to influence the test; therefore, a larger linear test range can be realized in an actual test.

The utility model relates to the field of analyzer verification, and discloses a trace oxygen analyzer verification device which comprises an analyzer body, a display screen fixedly connected to the surface of the analyzer body, a connecting box fixed to the top of the analyzer body, and an air outlet end fixed to the top of the analyzer body. An air exhaust mechanism for exhausting air from the connecting box is arranged at the top of the analyzer body, an oxygen sensor is fixed at the top in the connecting box, an air inlet end is fixed on the outer side wall of the analyzer body, and a second connecting pipe is arranged at one end of the air inlet end. The inside of the connecting box is subjected to air extraction treatment through the air extraction mechanism, and part of air contained in the analyzer body is extracted by matching with the air outlet end, so that the influence of residual air in the analyzer body on the detection result of the oxygen content is avoided, and the practicability of the device is improved; the joint of the air inlet end and the second connecting pipe is sealed twice, so that external air is prevented from entering the analyzer body, and the accuracy of a detection result is improved.

To provide a dissolved oxygen consumption measuring device capable of efficiently measuring dissolved oxygen consumption of a number of samples and being easily downsized.SOLUTION: A dissolved oxygen consumption measuring device 1 includes: a container 2; a sample liquid supply channel 7 that supplies a sample liquid; an air supply channel 8 that supplies an aeration air; a supply nozzle 10 that supplies a fluid selectively supplied from the sample liquid supply channel 7 and the air supply channel 8 into the container 2; and a dissolved oxygen sensor 4 that detects a dissolved oxygen concentration of the sample liquid supplied to the container 2.SELECTED DRAWING: Figure 1

According to various embodiments, a sensing device for measuring oxygen concentration cycles in breath is disclosed. The sensing device includes a laser configured to emit light at an A-band of oxygen, a lens configured to collimate the light, and a multi-pass cell configured to contain a replaceable sample cell. The light passes through the multi-pass cell and is attenuated by oxygen in the sample cell. The sensing device further includes a photodetector configurated to convert the attenuated light into an electrical signal, and a lock-in amplifier or an equivalent processing circuit configured to determine oxygen concentration from the electrical signal.

The utility model discloses a biomass gas combustion system capable of accurately controlling combustion. The system comprises a biomass gas burner, a biomass gas pipeline connected with the burner, an air blower, an air supply pipeline connected with the air blower and the burner, a tar collecting device in a hearth of the biomass boiler, an oxygen sensor arranged on a smoke exhaust pipeline of the boiler, a controller based on a PLC (Programmable Logic Controller) system, and an air blower frequency converter. Gas component, flow, temperature and pressure measuring devices are arranged on the biomass gas pipeline, and flow and temperature measuring devices are arranged on the air supply pipeline. The controller calculates the oxygen amount needed by biomass gas combustion and the oxygen amount provided by the air blower according to data fed back by the measuring device, and controls the air blower frequency converter to adjust the air amount of the air blower under correction of data fed back by the oxygen sensor on the boiler smoke exhaust pipeline, so that combustion is accurately controlled under the condition of partial load of the boiler, and the combustion efficiency is improved. The combustion efficiency is improved, and the pollutant emission is reduced.

A silencer 20 includes an external shell member 31 having a silencer chamber SP defined therein and an internal pipe 51 disposed in the silencer chamber SP. The external shell member 31 has an external shell opening 60 formed in a peripheral wall thereof, and the internal pipe 51 has a pipe opening 68 is formed in a peripheral wall thereof. The internal pipe 51 includes a cylindrical projection 69 protruding radially outwards from the peripheral wall of the internal pipe 51. The projection 69 is provided along the circumference of the pipe opening 68 about the axis of the pipe opening 68. An oxygen sensor 64 is positioned so as to plug the pipe opening 68. The silencer 20 includes a cap 72 that covers the external shell opening 66. The cap 72 is joined to a portion of the external shell member 31 around the external shell opening 66 and to the projection 69 of the internal pipe 51. An outer radius dimension d1 of the projection 69 is set smaller than an inner radius dimension d2 of the external shell member 31.

The utility model discloses a grain situation insect gas pipeline air tightness automatic diagnosis system, which comprises an in-bin gas path system and an insect gas detection system, the in-bin gas path system comprises a plurality of gas path channels, and each gas path channel comprises an in-bin gas collecting pipe, an in-bin pipe outlet device, a control ball valve and a gas pipe connector, the in-bin gas collecting pipe, the in-bin pipe outlet device, the control ball valve and the gas pipe connector are connected in sequence; the insect gas detection system comprises an insect detection channel and a gas detection channel, the in-bin gas path system is connected with the insect detection channel and the gas detection channel through a first T-shaped tee joint, and the insect detection channel comprises an insect detection ball valve, an insect detection counting module, an insect collection bottle and a large air pump; the gas measuring channel comprises a gas measuring solenoid valve, a first filter, a replacement solenoid valve, a second filter, a one-way throttle valve, a carbon dioxide sensor, an oxygen sensor, a phosphine sensor, a diagnosis solenoid valve and a small gas pump. According to the utility model, the functions of real-time detection of gas in the granary, pest detection, counting, statistics and early warning, gas path pressure detection, gas tightness diagnosis and the like can be realized.

The utility model discloses a pump chamber layer structure of a ceramic chip, the ceramic chip and a nitrogen oxygen sensor, and relates to the technical field of sensors, the pump chamber layer structure comprises a gas inlet buffer chamber, a main pump chamber, an auxiliary pump chamber and a measuring pump chamber are sequentially arranged at the rear end of the gas inlet buffer chamber, and the gas inlet buffer chamber is of an arc-shaped structure; the ceramic chip comprises the pump chamber layer structure. The nitrogen-oxygen sensor comprises the ceramic chip. A gas inlet buffer chamber in the pump chamber layer structure is arranged to be of an arc-shaped structure, the phenomenon of turbulent flow after tail gas enters the ceramic chip can be effectively avoided, the stability of the tail gas after the tail gas enters the ceramic chip is improved, and then the testing precision of the ceramic chip is improved. The outer surface of the ceramic chip containing the pump cavity layer structure is in an arc-shaped outline, and the main pump cavity, the auxiliary pump cavity, the measuring cavity and the motor are all in arc-shaped outline design, so that stress concentration during normal work can be eliminated and reduced, and the service life of the ceramic chip is prolonged.

The utility model relates to the technical field of oxygen sensors, and discloses an oxygen sensor with an electronic valve. The oxygen sensor with the electronic valve comprises an outer protective shell, a sensor body and a transparent front cover, the sensor body is arranged in the outer protective shell, a stepped hole which is communicated with the interior of the outer protective shell and matched with the transparent front cover is formed in the front side of the outer protective shell, and an assembly shell is fixedly connected to the rear side of the outer protective shell; the device has the advantages that the transparent front cover on the front side of the outer protective shell can be rapidly detached or installed, elastic sealing is achieved between the transparent front cover and the outer protective shell, vibration cannot affect the sealing performance, and the problems that the transparent cover is fixedly connected to the front side of the outer protective shell of the device and used for observing the running state of the sensor, and when the sensor breaks down, the sensor cannot be damaged are solved. The problems that a transparent cover fixed to the front side of an outer protective shell is inconvenient to take down, and sealant is injected into the outer protective shell, so that the sensor is difficult to maintain and only can be replaced, and the cost is increased are solved.

The invention discloses an electrochemical oxygen sensor and a diaphragm material selection method and a detection result intelligent compensation method thereof. The electrochemical oxygen sensor comprises a shell, a measuring cavity is formed in the shell, a pressure adjusting cavity is formed in the position, below the measuring cavity, of the shell, and a buffer diaphragm is arranged between the pressure adjusting cavity and the measuring cavity; a barrier film is arranged between the pressure adjusting cavity and the outer part of the shell, so that the detection accuracy of the electrochemical oxygen sensor under a pressure change environment condition is improved; the buffer diaphragm is preferably made of polytetrafluoroethylene; a detected oxygen signal value is corrected according to a high-precision temperature measurement result after temperature sensing and intelligent compensation in combination with a preset temperature-compensation coefficient corresponding algorithm, the technical problems that traditional temperature compensation depends on a hardware circuit and is low in precision and poor in adaptability are solved, and the high-precision and intelligent temperature compensation effect is achieved.

One embodiment includes a respirator system that corrects oxygen sensor measurements, such as measurements derived from an oxygen sensor in a mixing chamber of an indirect calorimeter or oxygen consumption (VO2) monitoring device. In one example, an embodiment determines an inhaled oxygen fraction drift provided by a respirator and corrects a VO2 determination made by the system using a change or rate of change in the inhaled oxygen fraction over time.

The invention relates to a liquid metal oxygen sensor reference electrode system and method with both precision and safety, which can provide stable oxygen partial pressure when a probe works normally and actively prevent harmful substances from leaking when the probe is damaged, so that the measurement precision of a liquid metal oxygen sensor is ensured, and the safety and the reliability are improved at the same time. Comprising a sensor, a gas micro-flow controller, a reference gas cylinder, an inert gas cylinder, a gas fan and a waste gas treatment system, the sensor is connected with a signal measuring instrument through a cable; the sensor is connected with a reference gas cylinder and an inert gas cylinder through a gas supply pipeline; the sensor is sequentially connected with a back pressure valve, a pressure measuring instrument, a gas component measuring instrument, a gas fan, a check valve and a waste gas treatment system through an exhaust pipeline. The long-term measurement accuracy and stability can be improved, and the system misoperation probability is reduced; meanwhile, the safety of the reference electrode powder is ensured.

The utility model discloses an oxygen sensor chip forming machine convenient for corner cutting, which comprises an operation table, the operation table is directly arranged on the ground, and clamping mechanisms are symmetrically arranged on the left side and the right side above the operation table. The clamping mechanism comprises a chip body, a clamping plate, a first push rod, a moving block, a fixing groove, a second push rod, a rotating rod and a motor. According to the oxygen sensor chip forming machine convenient for corner cutting, the clamping mechanism is arranged, so that a chip is automatically and firmly clamped during punching, it is ensured that position deviation cannot occur in the chip punching process, meanwhile, the corner cutting mechanism is arranged, and the chip can be conveniently cut through the corner cutting mechanism. Compared with the prior art, the corner of the chip is cut before the chip is punched, so that the corner of the chip becomes flat, the chip production precision can be greatly improved, in addition, the automatic material taking mechanism is arranged, after the chip is punched, manual material taking is not needed, and manpower is greatly saved.

The application discloses a dishwasher and a control method thereof. The dishwasher comprises a dishwasher body with an inner cavity, a spray arm assembly arranged in the inner cavity, and a booster pump arranged on a water inlet pipeline of the spray arm assembly. The dishwasher further comprises an oxygen sensor arranged in the inner cavity and a visual sensor arranged in the inner cavity and used for acquiring the state of the oxygen sensor. The water pressure, the water flow and the rotating speed of the exhaust fan of the spray arm assembly are controlled by detecting the state of the oxygen sensor through the visual sensor, so that the situation that the liquid column sprayed by the spray arm assembly directly sprays to the oxygen sensor or the situation that the bubbles generated by the cleaning liquid are blocked in the detection port of the oxygen sensor are reduced during the cleaning process, the humidity detection effect of the oxygen sensor is effectively improved, the cleaning degree in the dishwasher is improved, and the dishwasher has the advantages of simple structure and convenient use.

The present application relates to the technical field of medical monitoring, and discloses a portable blood oxygen signal OSA intelligent detection system, which comprises the following steps: collecting a pulse wave signal through a blood oxygen sensor, generating an amplitude difference sequence and a period difference sequence in parallel, analyzing the rhythm synchronism of the two, and determining a respiratory effort event when a real-time relationship index deviates from a reference value. The present application captures the pulse wave timing-amplitude decoupling phenomenon, realizes direct sensing of the specific mode process of the invalid respiratory effort signal, avoids the traditional lag monitoring mode which relies on blood oxygen decline, has the inherent ability to distinguish physiological fluctuations from the specific mode struggle of the signal, and provides a new solution for early screening of mild and moderate OSA.