35 results about "Respiratory simulator" patented technology

A system and method of delivering CO₂ in a respiration closed-loop control system to a respiratory simulator includes (a) providing a CO₂ supply to a respiratory simulator having a piston/cylinder arrangement; (b) providing flow control hardware between the CO₂ supply and the piston/cylinder arrangement; (c) generating a first control signal representative of a predefined amount of CO₂; and (d) providing the predefined amount of CO₂ into the piston/cylinder arrangement. Thereafter, either (i) an end-tidal carbon dioxide partial pressure (EtCO₂) value is determined based on an amount of CO₂ emptied from the piston/cylinder arrangement during an exhalation phase of the respiratory simulator or (ii) an EtCO₂ value is calculated via an equation. A second control signal is generated that is representative of a tidal volume and a breathing frequency representative of a physiological response to the EtCO₂ value to effect corresponding movement of the piston in a next inhalation and exhalation phase.

The invention provides a measuring device for a breathing mask and a measuring method thereof. The measuring device for the breathing mask comprises a standard human head, a breathing simulator and a leakage detector. A to-be-detected breathing mask is worn onto the standard human head. The breathing simulator provides simulated respiratory air for a human body to the standard human head. The leakage detector is used for detecting the sealing capacity of the breathing mask. The breathing simulator comprises an eccentric crankpin circle and a cylinder. The eccentric crankpin circle drives the stroke of the cylinder and the cylinder therefore generates simulated respiratory air for a human body and transmits the simulated respiratory air to the standard human head.

The invention relates to a mask particulate matter filtration efficiency and respiratory resistance detecting device. The device comprises a self-purification detecting chamber, a respiratory resistance detecting module, an aerosol module, an upstream photometer, a downstream photometer, a sinusoid respiratory simulator and a control module; the respiratory resistance detecting module, the aerosol module, the upstream photometer, the downstream photometer and the sinusoid respiratory simulator are communicated with the self-purification detecting chamber, and the control module controls operation of the overall device and comprises a filtration efficiency detecting control module, a respiratory resistance detecting control module, an aerosol concentration control module and a human sinusoid respiratory simulating control module. According to the scheme, a national head model and a respirator for simulating the human respiratory sinusoid are arranged, and aerosol with the specific concentration is controlled by the control module to be automatically generated; meanwhile, the two paths of high-precision photometers are adopted for sampling and detecting, and an original sodium flame detecting mode with the high equipment risk is abandoned; accordingly, the personal safety of experimenters is better guaranteed, the structure is simple, the cost is low, the intelligent degree is high, the detection precision and the operating efficiency are greatly improved, and the high application and popularization value is achieved.

The invention discloses a protective effect test chamber and a test method of a mask, aiming to provide a protective effect test device for a mask with convenient operation, good simulation effect and fast test evaluation. The closed compartment of the window is equipped with a headform breathing simulator in the closed compartment, a first dust sensor is arranged outside the exhalation port of the headform breathing simulator, and a first dust sensor is arranged inside the exhalation port of the headform breathing simulator. There is a second dust sensor, and the first dust sensor and the second dust sensor are respectively connected to the dust concentration meter arranged outside the closed chamber; The exhaust pipe imitates the test environment gas; the test method includes installing samples, starting the test, collecting data, calculating and processing, and printing the test results; the invention is used for the protective effect test of the mask.

A breathing simulator for use in an evaluation test of respirators is provided, the breathing simulator being able to simulate larger respirations, undergoing a change neither in cycle nor in the amount of ventilation even in a test of respirators having a high pressure drop, able to easily generate not only such regular waveforms as a sine wave, a rectangular wave and a triangular wave but also respiration waveforms of workers and arbitrarily created waveforms as air waveforms, being reduced in size and power consumption, and easy to maintenance. The breathing simulator comprises plural air cylinders (1) for generating an air waveform, a single electric cylinder (2) for actuating the air cylinders, a servo controller (3) for controlling the operation of the electric cylinder, an input/output unit (4) for recording an analog input from the exterior and reproducing the recorded data at an arbitrary magnification, a PC (5) for creating an arbitrary waveform, and a waveform generator 6 for outputting the created waveform.

A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.

The invention discloses a breathing simulator for calibrating a spirometer. The breathing simulator comprises an axially arranged cylinder body which has a sleeve structure with two axially open ends; a front end cover which is used for covering one open end of the cylinder body and is provided with a gas outlet; a rear end cover which is used for covering the other end of the cylinder body and is provided with gas vents; a piston which is movably arranged inside the cylinder body and the internal space of the cylinder body is divided into a left air chamber and a right air chamber by the piston in the axial direction; a screw which is axially arranged, wherein one end of the screw passes through the rear end cover and is connected with the piston; a stop block which is installed outside the cylinder body and is provided with a screwed hole coaxially with the screw, wherein the screw and the screwed hole are connected in a screw-thread fit mode; and a servo driving mechanism which is used for driving the screw to move axially. The additionally installed gas vents on the rear end cover allow the piston to move back and forth with less force. The screw is adopted for driving the piston to move so that transmission is more accurate and calibration precision is effectively increased. The stop block is connected with the screw in a screw-thread fit mode so that the screw is effectively guided and the screw is prevented from inclining.

The invention relates to the technical field of mask detection, and specifically relates a synchronous real-time testing method for mask protection effect and load respiratory resistance. The mask protection effect and load respiratory resistance under different particulate conditions can be detected. Through the technical scheme, the method comprises the following steps: (1) wearing a mask on a head die inside a testing cabin through manpower; (2) using a particulate generating module to generate salt particulates or oil particulates with different particulate size distributions and concentrations to be fed inside the testing cabin, and simulating a polluted air environment; (3) using a respiratory simulator, so that human body respiration is stimulated by the head die; (4) under the state of stimulated respiration, collecting the data of particulate concentrations and load respiratory resistances inside and outside the mask by a data receiving and processing module; and (5) processing collected data by the data receiving and processing module, contrasting with a standard value, if the standard value is exceeded, regarding the mask to be unqualified, and stopping a test; and if the standard value is not exceeded, regarding the mask to be qualified, and generating the performance curve diagram of the mask by the data receiving and processing module.

A breath simulator for supplying a breath test analyzer with a sample effluent of ethyl alcohol that controls headspace and adjacent effluent passageway temperature.

The invention discloses an individual dustproof respirator efficiency test experiment device and method, and relates to the technical field of pneumoconiosis prevention and treatment. The experiment device comprises two animal experiment cavities, a connecting pipe and a humanoid respiration simulator, wherein the two animal experiment chambers are a first experiment chamber and a second experiment chamber respectively, and a dust production system is arranged in the first experiment chamber; an individual dustproof respirator filter material is arranged in the connecting pipe and used for filtering dusty airflow flowing through the connecting pipe. The influence of dust on the lung health of a mouse and the dustproof effect of an individual dustproof respirator can be displayed more accurately and visually; experimental results are presented by comparing lung anatomy and pathological sections of the mouse, so that strong visual impact is caused to people, and a greater warning effectis achieved; and meanwhile, in the experiment process, according to the fact that the respiration of the human body is more similar to sinusoidal circulation flow, the accurate simulation of the respiration of the worker during operation is realized by utilizing the humanoid respiration simulator technology, and the experiment result is more accurate.

A protective facial mask test system and a test method belong to the technical field of test on protective performance of daily necessities. The test system comprises a test compartment, a head modelplaced in the test compartment, a respiration simulator, an aerosol generator and a real-time monitoring device, a laser particle counter I, a laser particle counter II, a temperature control device and a temperature and humidity sensing device are arranged in the test compartment, an air chamber is arranged in the head model, the air chamber is respectively connected with the respiration simulator, the laser particle counter II, an oral environment gas sampling tube and a nasal environment gas sampling tube; the laser particle counter I is used for measuring initial concentration of particulate matters in the test compartment; the laser particle counter II is used for measuring concentration of particulate matters after being filtered by a facial mask; the temperature and humidity sensingdevice is used for measuring humidity and temperature in the test compartment; and by virtue of control of the real-time monitoring device, the protective performance of a to-be-tested facial mask istested. The test system not only meets national standards but also can meet diversified test requirements of customers.

The invention discloses a test method for the protective effect of a children's mouth mask. The test method comprises the following steps: 1) wearing the children's mouth mask on a children's simulated head mould which can be divided into a series of stimulated head moulds for different ages, wherein each dimension is 80%-95% of the corresponding dimension of a standard adult head mould, and the series of stimulated head moulds comprises a stimulated head mould for a low-age group, a stimulated head mould for a high-age group and at least one stimulated head mould for a middle-age group, wherein the low-age group is more than or equal to three years old, and the high-age group is less than or equal to 14 years; 2) testing the protective effect, at the series of the stimulated head moulds,of the mouth mask by utilizing a test bin, a breathing stimulator and an aerosol concentration monitoring device; and 3) combining protective effect data measured on the series of stimulated head moulds of the mouth mask, and taking the minimum value of the protective effect as the protective effect of the sample. The test method performs protective effect test on the series of the stimulated headmoulds for children of different age groups, can solve the problem that the protective effect of the children's mouth mask cannot be tested, and is high in accuracy of detected results.

The invention relates to the field of medical instruments and in particular to a respiration simulator for cardiopulmonary exercise testing. The cardiopulmonary exercise testing is gradually popularized in China, and mainly used for the fields of rehabilitation medicine and sports medicine, and capable of providing clinic guide of quantifiable data for preoperative evaluation, postoperative rehabilitation, athletic training and the like, and providing a quantifiable data reference foundation for a clinicist. Because human body inhaled and expired gas components, gas concentration and gas flowrates of a person are not consistent in conditions of different time, environments and statuses, and initial conditions are difficult to be reproduced, cardiopulmonary indexes measured every time aredifferent, and reproducibility and consistency of a measuring result are poor, so further research of the cardiopulmonary exercise testing is hindered. In order to overcome deficiency of the prior art, the respiration simulator for the cardiopulmonary exercise testing is provided, and capable of relatively steadily simulating the human body inhaled and expired gas components, the gas concentrationand the gas flow rates.

The invention relates to the field of personal software testing, and provides a method for testing the data processing accuracy of a pulmonary function detector. The method comprises the following steps: S1, reading a breath wave curve; S2, carrying out data processing on the breath wave curve by adopting a data processing module of the to-be-tested pulmonary function detector, thus obtaining measured values of pulmonary function parameters; and S3, comparing the measured values of the pulmonary function parameters with the standard values of the pulmonary function parameters, thus determining the data processing accuracy of the pulmonary function detector, wherein the standard values of the pulmonary function parameters are the pulmonary function parameter values of the breath wave curve. For the testing method provided by the invention, the flow data of a standard tested person or the breathing simulator does not need to be collected, so that the errors during the data collection process are avoided, the comparison result of the measured values of pulmonary function parameters and the standard values of the pulmonary function parameters directly reflects the data processing accuracy of the pulmonary function detector, and thus the judging precision for the data processing accuracy of the pulmonary function detector is improved.

The invention relates to a multi-point detection system and method for the tightness of a mask. The system comprises a respiration simulator, an aerosol generator, aerosol concentration detection devices, a test bin and a head mold for testing; a plurality of particulate matter collection points are arranged on the head mold for testing, and each particulate matter collection point corresponds to one aerosol concentration detection device; after the mask is put into the test bin and worn on the head mold for testing, human respiration is simulated through the respiration simulator, the background concentration of particulate matter entering the testing mask is recorded, then the aerosol generator is started, and when the concentration of the particulate matter in the bin reaches a preset value, the concentration of a first test medium in the test mask corresponding to each particulate matter collection point and the concentration of a second test medium in the test bin are detected through the aerosol concentration detection device corresponding to each particulate matter collection point; and the corresponding tightness according to the background concentration of the particulate matters entering the test mask and the first test medium concentration and the second test medium concentration of each particulate matter collection point aredetermined.

A haptic respiration simulator includes: a pump unit; an accumulator for reducing noise originating from a pumping action of the pump, the accumulator being in fluid communication with an outlet of the pump; and a pump suspension system for reducing noise originating from operation of the pump, including: a tubular casing for receiving the pump unit at an inside thereof, the tubular casing having a substantially closed circumferential wall that prevents at least a part of the sound waves resulting from operation of the pump to transfer outside the tubular casing; an inner suspension for suspending the pump with respect to the tubular casing, the inner suspension being positioned between the pump and the tubular casing; a pair of end caps for sealing the tubular casing, and an outer suspension for suspending the tubular casing with respect to a housing.

A device for determining delivery of an aerosol stream has a collector having a filter for collecting aerosol particles in the aerosol stream, a first fluid connection point connectable to an aerosol generator, and a second fluid connection point connectable to a breathing simulator for simulating tidal breathing, at least one measurement volume for an interaction of at least one light beam with the aerosol particles passing through the measurement volume, at least one optical measurement unit for generating at least one optical measurement signal depending on the interaction of the at least one light beam with the aerosol particles passing the measurement volume, and at least one evaluation unit for determining the aerosol delivery of the aerosol stream from the at least one optical measurement signal. A method determines an absorption and/or adsorption of a liquid on aerosol particles.

A mask obstruction evaluation system comprises a wind tunnel cover body, a mask carrier, a breathing simulator, a pressure difference sensor, a draught fan and a dust feeding device. The wind tunnel cover body comprises the relative air inlet and the exhaust outlet, the mask carrier is arranged in the wind tunnel cover body and is used to install a mask. The breathing simulator is connected with the mask carrier to provide an airflow to pass the mask repeatedly, the pressure difference sensor is connected with the mask carrier to detect the breathing impedance in the mask. The draught fan is connected with the air inlet, and the dust feeding device is arranged in the air inlet to provide the dust to the wind tunnel cover body.

The invention discloses a respiration simulator. The respiration simulator comprises a base, wherein an air inlet and an air outlet are formed in the base, a respiration cavity is formed in the base,a piston assembly is arranged in the respiration cavity, a driving mechanism is arranged on the upper portion of the respiration cavity, and the driving mechanism drives the piston assembly to move upand down so that air can be exhaled into the respiration cavity from the air inlet and exhaled out from the air outlet. According to the breathing simulator, breathing is simulated in the mode that the piston is driven by the screw, the structure is simple, the respiration simulator is convenient to use, and production cost is low; and the water tank is arranged in the breathing simulator base, so the exhaled air carries water and is closer to the real breathing condition of the human body.

A respiratory metabolic simulator is disclosed. The respiratory metabolic simulator includes a catalytic carbon dioxide generator having a first inlet adapted for receiving a fuel and a second inlet adapted for receiving a gas; a breathing simulator; and a controller; wherein an exhaust of the catalytic carbon dioxide generator combines with an exhaust of the breathing simulator; and wherein the controller is configured to vary at least one of the fuel and the gas provided to the catalytic carbon dioxide generator such that the combined exhausts emulate human exhalation.

The invention discloses a respiratory protection testing machine. The respiratory protection testing machine comprises a dry vacuum pump, an observation bin, a dust generating roller, a mixed jet device, a diffusion fan, a first head mold, a second head mold, a displayer and a controller. The dust generating roller, the mixed jet device, the diffusion fan, the first head mold and the second head mold are all arranged in the observation bin; the dry vacuum pump and the dust generating roller are both connected with the mixed jet device through pipes, and the diffusion fan is arranged in the emitting direction of the mixed jet device; the first head mold and the second head mold are connected with breathing simulators through throat pipes, and a mask or a protective mask is worn on the firsthead mold; the display and the respiration simulators are electrically connected with the controller. According to the invention, the field operation environment can be simulated, and a contrast experiment is carried out to fully illustrate the necessity and importance of wearing a mask or a protective mask, so the protection consciousness of personnel is improved.

The invention relates to the technical field of mask equipment, and discloses a simulated wearing pretreatment machine, which comprises a rack and a head mold. A heating and humidifying cabin is arranged in the rack and is connected with an expiration pipe of the head mold through a pipeline; the respiration simulator comprises a servo motor, a transmission mechanism and a respiration simulator air cavity, the output end of the servo motor is connected with the transmission mechanism, the transmission mechanism is connected with the respiration simulator air cavity, the respiration simulator air cavity is connected with an air suction pipe of the head mold, and the respiration simulator air cavity is connected with the heating and humidifying cabin through a pipeline; and the main board iselectrically connected with the heating and humidifying cabin and the respiration simulator. The simulated wearing pretreatment machine provided by the invention is more stable in operation and moreaccurate to realize the simulated wearing pretreatment of the mask.