119 results about "High altitude environment" patented technology

The invention discloses an intelligent response method for an arc fault of a high-altitude switch cabinet, relates to the technical field of safety protection of power equipment in a high-altitude area, and aims to solve the problems that the arc time of the arc fault is prolonged, the pressure in the cabinet is sharply increased, a traditional disposable pressure relief device cannot be reset and is lack of insulation state evaluation, and the reliability is poor. The invention aims to provide a response method which combines optical signal and pressure double-criterion detection, resettable pressure relief, gas component analysis and intelligent decision so as to improve the safety and reliability of the switch cabinet.

The invention discloses a multi-target intelligent optimization method and system for blasting parameters of a strip mine in a high-altitude cold region. The method comprises the following steps: carrying out data acquisition to obtain a parameter data set; performing data preprocessing on the parameter data set to obtain a feature sample set; constructing an initial blasting parameter model based on a machine learning algorithm, and performing hyper-parameter optimization on the model to obtain a blasting parameter model; a multi-objective optimization function is constructed: based on the multi-objective optimization function and the blasting parameter model, solving is carried out in combination with environmental condition constraints, and a pareto optimal solution set is obtained; according to the pareto optimal solution set, a representative solution is selected, a visual scheme is generated, and blasting parameter optimization of the strip mine in the high-altitude cold region is completed. According to the method, temperature, oxygen and frozen soil constraint conditions of the high-cold and high-altitude environment are introduced, blasting safety, lumpiness uniformity and the explosive utilization rate are considered at the same time through multi-target collaborative optimization, the method can adapt to the extreme environment, meanwhile, the one-sidedness of single-target optimization is avoided, and the intelligent level of blasting design and implementation is greatly improved.

The invention discloses a high geological disaster chain risk quantitative assessment method adapted to a high-cold and high-altitude environment, and relates to the technical field of geological disaster monitoring and prevention and control, and the method comprises the following steps: S100, building an irradiation and reflection combined observation layer, collecting the dynamic intensity of direct light and reflected light, generating an exposure time sequence fingerprint baseline, and obtaining an exposure time sequence fingerprint baseline; and determining a critical threshold value of the direct light intensity according to the base line. The method comprises the following steps: constructing an irradiation and reflection combined observation layer to extract light intensity characteristics, and generating an exposure time sequence fingerprint baseline; a trigger point boundary is extracted by adopting coherent phase decomposition and anti-fact playback, and a continuous track is reconstructed; the overexposure risk is predicted based on the time-frequency score, and spectrum gating and polarization rotation are linked to regulate and control the exposure rhythm; and reverse phase traction and phase conjugate intervention are implemented in a steady-state window, so that boundary information is maintained and the risk identification precision is improved.

The invention provides a high-cold and high-altitude environment-oriented energy storage battery state monitoring method and system, and the method comprises the steps: innovatively constructing a multi-scale physical constraint framework: extracting multi-dimensional features through a cavity convolution network with a time sequence perception capability, and fusing the initial state physical information of a battery; embedding inherent physical law constraints of the battery into the characteristic space, wherein the inherent physical law constraints comprise forced charge conservation, health state one-way attenuation and temperature and pressure self-adaptive stability control; a special compensation mechanism is designed for an extreme environment, accurate state estimation is realized by dynamically correcting a low-temperature diffusion behavior, and lithium precipitation safety early warning triggered by multi-condition collaboration is established. A calibration-free training strategy is adopted, model optimization is completed only through a small amount of boundary data, and adaptability is enhanced and improved in combination with plateau environment data. And the method can be operated in a resource-limited embedded platform through lightweight processing. And under the working conditions of high and cold and low air pressure, the core industry problems of insufficient adaptability to extreme environments, misalignment of physical rules, limited hardware deployment and the like are effectively solved.

The invention discloses personal life support equipment in a high-altitude environment and a cooperative control method thereof, and relates to the technical field of personal life support equipment, and the equipment comprises a respiration sensor which is arranged on a mask and is used for detecting respiration frequency and phase; the blood oxygen and heart rate sensor is worn on the wrist of the user and used for detecting the blood oxygen saturation degree and the heart rate; the body temperature sensor is attached to the chest of the user and used for detecting the core body temperature; the automatic oxygen supply device is used for providing oxygen; the intelligent heating device comprises partition heating pieces attached to the chest and the four limbs of the user and is used for partition heating; the microcontroller unit is used for formulating an optimal life support strategy according to the sensor data and intelligently and cooperatively controlling the working states of the automatic oxygen supply device and the automatic heating device according to the optimal life support strategy; the sensor data comprises respiratory frequency and phase, oxyhemoglobin saturation, heart rate and core body temperature, and dynamic oxygen supply and body temperature adjustment can be cooperatively controlled.

The invention discloses a thermal management system for a hydrogen-oxygen-heat-power quadruple supply system for a high-cold and high-altitude area. The thermal management system comprises an input and production unit, a storage and processing unit, a power generation and heat recovery unit, a thermal management loop unit, a thermal management auxiliary system, an intelligent control unit and an energy output and application unit. Through precise design of the multi-temperature gradient heat management loop unit, under cooperation of the intelligent control unit, all energy generated in the system is recycled in a graded mode, distributed according to needs and recycled, finally, efficient output is achieved through the energy output and application unit, and the application bottleneck in the high-cold and high-altitude environment is thoroughly solved. The system solves the problems that the heat dissipation efficiency is suddenly reduced at a high altitude, low-temperature starting and operation are difficult, water resources are seriously wasted, and the comprehensive utilization efficiency of energy is low in an existing unified heat management system.

The invention discloses a health assessment method, system and device for high-altitude power transformation equipment and a storage medium. The method comprises the following steps: acquiring multi-source monitoring data of power transformation equipment, and extracting a parameter value of each key parameter from the monitoring data; inputting the parameter value of each key parameter into a pre-trained degradation degree evaluation model to obtain a degradation degree evaluation value of each key parameter; determining an initial health assessment value of the power transformation equipment based on each relevancy between each key parameter and the performance degradation of the power transformation equipment and each degradation degree assessment value; determining an influence coefficient based on the altitude value of the geographic position of the power transformation equipment; and determining a health assessment value of the power transformation equipment based on an initial health assessment value and the influence coefficient. The physical mechanism constraint fused with the degradation degree evaluation model enables the degradation degree evaluation value determined based on the degradation degree evaluation model to be closer to the actual situation of the high-altitude environment, and improves the accuracy of health evaluation of the high-altitude power transformation equipment.

The invention relates to a high-altitude extra-high voltage transformer partial discharge test interference identification and suppression method, and belongs to the technical field of high-altitude region electrical equipment insulation state detection. In order to solve the technical problems that interference signals and real discharge signals are difficult to distinguish and the signal-to-noise ratio is low in the partial discharge test of the extra-high voltage transformer in the high-altitude environment, the method combines instantaneous zero-crossing density analysis and wavelet packet multi-scale feature extraction; according to the method, a multi-dimensional criterion fusing energy features, zero-crossing features, time-domain shape features and altitude correction factors is constructed, an adaptive interference discrimination rule is established, a frequency domain and time domain combined suppression strategy is adopted, various interference signals are effectively identified and suppressed, meanwhile, waveform and amplitude information of real partial discharge pulses is reserved to the maximum extent, and the suppression precision is improved. Therefore, the signal-to-noise ratio and the reliability of a partial discharge measurement result are remarkably improved, and key technical support is provided for accurate evaluation of the insulation state of the high-altitude extra-high voltage transformer.

The invention belongs to the field of intelligent inspection of power equipment, and particularly relates to a transformer substation unmanned aerial vehicle dual-light inspection route planning method. According to the method, original laser point cloud of substation equipment is simplified, an equipment semantic lattice diagram containing high-altitude environment attributes and equipment semantic tags is constructed, dual-light inspection constraint parameters, namely infrared temperature precision and visible light resolution, are analyzed, and a semantic-environment dual-constraint initial route is generated; and flight and dual-light equipment parameters are dynamically adjusted in combination with a high-altitude environment, and routing inspection coverage completeness and data qualification are ensured through semantic weight driven dynamic obstacle avoidance and dual-light data quality closed-loop verification. According to the method, the route coverage is larger than or equal to 99%, the dual-light data qualification rate is larger than or equal to 95%, the redundant route mileage is reduced by 30%, the method is adaptive to a high-altitude transformer substation suspension type porcelain insulator and composite insulator dual-light inspection scene, and high-quality data support is provided for joint detection of insulator infrared thermal defects and visible light surface defects.

The invention belongs to the technical field of piston engines, and particularly relates to a variable-volume crankcase which is integrated with a deformable and automatically-recoverable device, a variable-volume cavity is formed in the crankcase through a deformable or slidable diaphragm, and particularly, an elastic reset element is arranged in the upper surface of the device, so that the variable-volume cavity is formed in the crankcase. It is ensured that the diaphragm can stably and regularly move and reset after deforming or sliding; power for deformation or sliding of the diaphragm comes from periodical extrusion of an engine crank to the diaphragm, by correctly matching a volume change curve of the crankcase with an air distribution phase, the volume of the crankcase is enlarged during air inlet, so that negative pressure in the crankcase is increased, the volume of the crankcase is reduced during scavenging, pressure in the crankcase is increased, and the service life of the crankcase is prolonged. The technical problems of insufficient air intake, low scavenging efficiency, power attenuation and the like of a two-stroke piston engine under the low air pressure condition are solved, and a feasible solution is provided for power improvement of a small aero-engine and power recovery in a high-altitude environment.

The invention belongs to the technical field of generator stator coil materials, and particularly relates to a method and a system for evaluating aging resistance of a generator stator coil in a high-altitude environment. The method is based on research on service characteristics and evolution laws of a generator stator coil in a high-altitude environment; the aging resistance of the generator stator coil is evaluated through the following indexes for the first time: testing the breakdown voltage of the stator coil, the concentration of volatile organic compounds detected under the thermo-oxidative aging condition, the heat conductivity coefficient, the specific surface area of solid substances, the porosity and the liquid adsorption performance. The evaluation method provided by the invention has the advantages of accuracy and rapidness, and has a good application prospect.

The application provides a sleep mask for simulating a plateau environment, comprising a mask body, a mounting seat arranged on the mask body, a total air passage arranged on the mounting seat and being in communication with the outside world, and a flow resistance adjusting mechanism for adjusting the flow resistance of breathing air in the total air passage, wherein the flow resistance adjusting mechanism comprises a ventilation port arranged on an end wall of the total air passage and a flow resistance adjusting piece for adjusting the size of the ventilation port. The sleep mask for simulating a plateau environment can be used for simulating the sleep of a person in a plateau area at different altitudes. The sleep mask for simulating a plateau environment can adjust the opening of the ventilation port by the flow resistance adjusting piece during sleep, adjust the air amount entering the total air passage per unit time, and further adjust the total oxygen content inhaled by the person in each breathing cycle, so as to achieve the technical purpose of simulating the sleep in a plateau area at different altitudes in a normal altitude area.

The invention belongs to the technical field of traditional Chinese medicine compositions, and particularly relates to plant essential oil for relieving altitude stress and a preparation method thereof. According to the method, Tibetan medicine plants serve as core raw materials, active ingredients of the Tibetan medicine plants are completely reserved through a low-temperature smashing technology, and then the high-purity Tibetan medicine plant essential oil is accurately extracted through a supercritical CO2 extraction technology; then, according to efficacy suitability, Tibetan medicine plant essential oil is scientifically compounded with various selected plant essential oil, finally, the compound plant essential oil capable of effectively relieving acute altitude stress is researched and developed, component activity and practical efficacy are both considered, and a natural relieving scheme is provided for body discomfort in the altitude environment.

The invention relates to the technical field of hydrogen-related testing, and discloses a hydrogen-related high-altitude environmental chamber system and a testing method thereof. An air conditioning system; the fresh air system provides fresh air with different humidity for the interior of the environment chamber body; the exhaust suction system simulates high-altitude low air pressure in the cabin body of the environmental cabin; the safety system is used for monitoring the oxygen concentration of the environmental chamber body and monitoring the hydrogen concentration of the environmental chamber body at multiple points; and the control system is used for connecting and controlling the air conditioning system, the fresh air system and the exhaust suction system to simulate the high-altitude temperature, humidity and low-pressure pressure, and is also used for receiving the oxygen concentration and the hydrogen concentration in real time and giving an alarm when any gas concentration is abnormal. According to the hydrogen-related high-altitude environmental chamber system and the testing method thereof, the temperature, humidity and low air pressure of high altitude can be simulated, the concentration of hydrogen and oxygen can be monitored in real time, multi-point accurate monitoring is performed on hydrogen, and automatic and timely treatment is performed when the concentration of hydrogen and oxygen is abnormal.

The invention discloses a protective coating suitable for rail transit in a high-altitude environment and a preparation method of the protective coating, and belongs to the technical field of functional materials, the coating adopts a unique five-layer composite structure design, and is prepared through precise layered coating and a specific curing process. The coating system has a synergistic effect, comprehensively overcomes multiple harsh factors such as high-altitude strong ultraviolet rays, geothermal water gushing, severe temperature change, sand wind erosion and corrosive media, and provides excellent weather resistance, impact resistance, long-acting corrosion resistance, firm adhesive force and electrical insulating property. The preparation process is high in controllability, the overall protection performance of the coating is remarkably superior to that of a traditional single-layer or three-layer coating, the service life of a vehicle in a high-altitude complex environment can be greatly prolonged, and the maintenance cost is reduced.

The application discloses a high-altitude environment laboratory safety protection system, which comprises a control room, a transition room and a high-altitude environment laboratory. The control room is communicated with the transition room through a first transition door and a third pipeline, and the transition room is communicated with the atmosphere environment through a first pipeline. The transition room is communicated with the high-altitude environment laboratory through a second transition door, a second pipeline and a fourth pipeline. A first control component and a second control component are respectively formed on the first pipeline and the second pipeline in the transition room. A three-way adjusting piece is used for connecting the first pipeline, the second pipeline and the transition room. A third control component is formed on the first pipeline in the control room. A fourth control component is formed on the fourth pipeline in the high-altitude environment laboratory. A first differential pressure sensor is formed in the control room or the transition room. A second differential pressure sensor is formed in the transition room or the high-altitude environment laboratory. The first transition door and the second transition door are in a mutually exclusive relationship. The application can avoid the health risks of the operating personnel when entering and leaving the high-altitude environment laboratory, and ensure the health and safety of the operating personnel.

The application provides a high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions and a preparation method and application thereof. The high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions is composed of mixed alcohols, pine oil, sulfur-nitrogen esters, diesel oil, xanthate and a surfactant. The high-efficiency foaming agent suitable for argillaceous porphyry copper ore in high-cold regions is simple in preparation method, does not produce intermediate products, has low irritation, is friendly to the environment, has low dosage of the medicament compared with traditional single foaming agent, has stable foam properties, and can also assist in collecting some chalcopyrite, molybdenite and other sulfide ores. Within the range of the component allocation, the foaming agent can fully exert the synergistic effect of each component. In a high-altitude environment (altitude >= 3500m), the foaming capacity and foaming rate of the foaming agent are obviously superior to those of traditional foaming agents.

The invention discloses a roller compacted concrete composition adaptive to a high altitude environment and a preparation method thereof, and the roller compacted concrete composition comprises the following components in parts by mass: 60-100 parts of cement, 65-75 parts of fine aggregate, 100-120 parts of coarse aggregate, 10-20 parts of zeolite powder, 1-5 parts of dopamine hydrochloride, 5-15 parts of activated fiber, 0.2-0.4 part of aminated polystyrene microspheres, and 0.1-0.5 part of a carbodiimide cross-linking agent. And 1-2 parts of a water reducing agent. The problems of insufficient early strength, later shrinkage cracking and poor freezing resistance of concrete in a high-altitude environment are solved, a composite system of polydopamine modified zeolite and activated fibers optimizes pore distribution and a stress transfer path, the balance of early strength, crack resistance and durability is realized, and the early strength, crack resistance and durability of the concrete are improved. And a reliable concrete solution is provided for high-cold and high-altitude engineering.

The embodiment of the present disclosure provides a battery heat preservation device and system suitable for high-altitude pipeline valve chamber, which comprises a shell, a temperature control layer arranged on the inner wall side of the shell, a first heat preservation layer arranged on the side of the temperature control layer away from the shell, and a first heat reflection layer arranged on the surface of the first heat preservation layer away from the temperature control layer. In the present application, the first heat reflection layer is arranged between the inner wall of the shell and the temperature control layer, between the temperature control layer and the first heat preservation layer, and on the surface of the first heat preservation layer away from the temperature control layer, which can meet the requirements of low-temperature resistance, fire prevention, water resistance and other characteristics in high-altitude environment. Since the first heat reflection layer can reflect heat, it can maximize the transfer of heat to the entire shell, which is suitable for the characteristics of the battery working in a low-temperature environment.

This invention discloses a machine learning model integrating oral microbiome and clinical features and its application in predicting sarcopenia at high altitudes. The method targets high-altitude populations residing at altitudes >3500 meters, collecting oral microbiome 16S rRNA sequencing data, clinical features, and lifestyle data. Core predictive factors are selected through adaptive preprocessing and elastic network regularized regression, and a classification model is constructed using logistic regression. To address the sample imbalance problem in high-altitude areas, this scheme introduces a synthetic balanced sampling strategy based on target distribution doubling; simultaneously, Platt Scaling is used for two-layer probability calibration, combined with a dynamic threshold optimization mechanism based on F1-Score to improve discrimination accuracy. This invention is the first to integrate oral microbiome shaped by the high-altitude environment (such as…)… Selenomonas , Veillonella (etc.) are incorporated into the predictive model. Experiments show that the model achieves an AUC of 0.868 on the independent test set and has advantages such as being completely non-invasive, low-cost, and highly interpretable. This invention provides an efficient early screening program for sarcopenia in resource-scarce high-altitude areas.

The utility model discloses a device for monitoring the alternating thermal aging effect of an atmosphere on a stator bar, and relates to the field of monitoring the insulating capacity of a generator stator bar. The simulation box is a sealed box body; the stator bar is installed in the simulation box. The atmosphere control module is used for controlling the oxygen concentration in the simulation box; the temperature control module is used for controlling the environment temperature in the simulation box; the macroscopic deformation monitoring module is used for acquiring macroscopic deformation of the stator bar; the internal stress monitoring module is used for acquiring internal stress of the stator bar; and the master controller is connected with each module. The generator stator bar insulation alternating thermal aging monitoring device can solve the problem that in the prior art, the full periodicity of a generator stator bar operating under the oxygen concentration condition of a high altitude environment cannot be effectively monitored under the insulation alternating thermal aging effect.

The invention relates to the technical field of water conservancy and hydropower engineering, and discloses a high-altitude gravity dam freeze-thaw cycle finite element simulation method which comprises the following steps: S1, establishing a gravity dam finite element discrete model; s2, constructing a pore water phase change physical model according to the global environment parameters; s3, establishing a full-coupling control equation set according to the ice saturation; and S4, solving the full-coupling control equation set through a multi-physics field coupling strategy, and obtaining field variable data. According to the method, accurate physical modeling of high-altitude environmental factors is realized, and the fidelity of a simulation result under a specific regional condition is greatly improved; a more complete multi-physical field coupling frame is constructed, and the internal mechanism of concrete performance degradation under the freezing and thawing effect is accurately captured; refined panoramic information of the internal state of the structure is provided, and the high-resolution data provides a scientific basis for deep understanding of a damage mechanism of the gravity dam, quantitative evaluation of the structure safety, prediction of the service life and formulation of a maintenance and reinforcement strategy.

The application provides a kind of energy storage battery state monitoring method and system for high-cold high-altitude environment, innovatively constructs multi-scale physical constraint framework: through the hollow convolution network with time sequence perception ability, multi-dimensional features are extracted, and the physical information of the initial state of the battery is fused;Embedding the inherent physical law constraint of the battery in the feature space, including forced charge conservation, health state one-way attenuation and temperature and pressure adaptive stability control;Design a special compensation mechanism for extreme environments, achieve accurate state estimation by dynamically correcting low-temperature diffusion behavior, and establish a multi-condition cooperative triggering lithium analysis safety warning. Adopting a calibration-free training strategy, only a small amount of boundary data is required to complete model optimization, combined with plateau environment data enhancement to improve adaptability. After light processing, it can run on a resource-limited embedded platform. In the high-cold low-pressure working condition, it effectively solves the core industry problems such as insufficient adaptability in extreme environment, inaccurate physical law and limited hardware deployment.

The present invention provides a high-energy liquid fuel suitable for use in high-altitude environments and a preparation method thereof, comprising the following components: 15-55wt% chain ether; 5-75wt% alkylene oxide; 10-40wt% organoaluminum compound. In the present invention, the organoaluminum compound can be well dissolved in the chain ether and the alkylene oxide, and can effectively improve the shelf life. It can be stored for a long time under air-tight conditions without sedimentation, aggregation or deterioration, and has good storage stability. Moreover, the organoaluminum compound has a lower detonation energy and a higher combustion energy, thereby ensuring the detonation temperature of the high-energy liquid fuel. Therefore, the high-energy liquid fuel provided by the present invention has a good balance between stability and combustion performance, can improve the combustion rate of the high-energy liquid fuel in plain areas, and better play the energy of the high-energy liquid fuel; can enhance the detonation effect in a high-altitude oxygen-deficient environment in high-altitude areas, and improve the detonation performance of the high-energy liquid fuel.

The present invention relates to the technical field of intelligent operation and maintenance of high-voltage electrical equipment, and in particular to an intelligent service system for remote operation and maintenance of high-voltage switchgear. It comprises the following parts: a data acquisition module: acquiring external gas density data, internal gas density data, ambient temperature data and internal temperature data of the circuit breaker in a high-altitude environment; a monitoring module: using the instantaneous change data of the external gas density data and the ambient temperature data as analysis data of the internal field strength of the circuit breaker; and optimizing the supply of accessories for the circuit breaker based on the analysis data. The present invention suppresses false alarms by decoupling environmental disturbances, optimizes the priority of accessory replacement based on three-dimensional field strength reconstruction, integrates multi-source data to calibrate the supply chain, and matches the supply cycle with the field strength degradation trend; combines the field strength deviation with the component correlation to generate a maintenance path, and constructs a closed-loop system from abnormality perception to precise scheduling, thereby improving the operation and maintenance efficiency and decision reliability of high-voltage equipment.

This utility model discloses a fresh air conditioning system for a high-altitude environment simulation laboratory, comprising: a fresh air unit with its fresh air duct connected to the side wall of the high-altitude environment simulation laboratory; a fresh air shut-off valve installed on the fresh air duct; and a pressure sensor arranged within the high-altitude environment simulation laboratory, which triggers an electrical signal when the pressure reaches different specified thresholds, causing the fresh air shut-off valve to perform shut-off or open operation. This utility model can provide a wide range of altitude adjustment and can also avoid the danger to personnel safety caused by sudden pressure changes in the altitude chamber.

This invention discloses a low-temperature charging and insulation device for unmanned aerial vehicles (UAVs) in high-altitude areas, belonging to the field of UAV charging and protection technology. The device includes a charging module, an insulation module, an environmental monitoring module, a control module, and a power supply module. The charging module provides adaptive charging services for the UAV battery, the insulation module provides low-temperature protection and temperature maintenance for both the battery and the charging module, the environmental monitoring module collects high-altitude environmental and device operating parameters, the control module dynamically adjusts the charging and insulation strategies based on these parameters, and the power supply module provides stable power. This invention achieves precise control of charging parameters and insulation temperature through the synergistic effect of PID control algorithms, fuzzy PID algorithms, and Kalman filtering algorithms, effectively solving the problems of low charging efficiency, easy damage, and poor insulation effect of UAV batteries in low-temperature, low-pressure, and strong interference environments at high altitudes, and is compatible with different UAV models.

The invention discloses an active-disturbance-rejection control method for a guided projectile in a high-altitude environment. The active-disturbance-rejection control method comprises the following steps: constructing an autopilot system equation; setting an extended state observer to estimate the disturbance of the autopilot system; setting an active-disturbance-rejection controller based on the disturbance estimation value, and outputting a control instruction through the active-disturbance-rejection controller; and the autopilot executes the received control instruction to control the attitude of the cannonball. According to the active-disturbance-rejection control method for the guided projectile in the high-altitude environment, input signals can be effectively controlled, and the stability and robustness of the system are effectively improved.

The invention belongs to the technical field of breathing machines, and particularly relates to an STM32-based first-aid breathing machine, a control system and a method.The mechanical air path structure of the first-aid breathing machine comprises a turbofan, a breathing pipeline, a mask, a collection module, a fan control module and a first-aid breathing machine master controller; the acquisition module comprises an atmospheric pressure sensor arranged at an air inlet of the turbofan, an air flow sensor arranged at an air outlet of the turbofan, and a differential pressure sensor and an air pressure sensor which are arranged at the tail end of the breathing pipeline, and all the sensors and the fan control module are electrically connected with the first-aid breathing machine main controller; the first-aid breathing machine control system comprises a double-ring PID ventilation control system, a man-machine interaction module electrically connected with the first-aid breathing machine master controller, and a power management module. According to the invention, a dual-ring PID air flow velocity control system is designed, an air pressure compensation mechanism and a dual-ring PID control technology are fused, and the problem that the air flow control precision of the first-aid breathing machine is reduced in a high-altitude environment is solved.

The invention discloses a motor train unit glass deformation measuring device and method for a high-altitude environment, and relates to the technical field of railway vehicles, and the device comprises a fixed support which is used for being fixedly connected with a motor train floor; the stay wire displacement sensor and the laser displacement sensor are arranged on the fixed bracket; the hardware module is used for converting analog signals obtained by monitoring of the stay wire displacement sensor and the laser displacement sensor into digital signals; the software module is used for receiving the digital signal converted by the hardware module and carrying out glass deformation analysis to obtain a glass displacement value; and the early warning information module is used for issuing early warning information when the glass displacement value is greater than a preset glass displacement threshold value. Based on the requirement of glass displacement measurement of the motor train unit in a high-altitude area, the difficulty in outer glass measurement is solved by utilizing the reflection characteristic of laser displacement, the relative displacement between the displacement sensor and the motor train is overcome through a special tool, the related limit value is analyzed and early warned in real time, and the actual requirement is met.