149 results about "Ambient pressure" patented technology

The invention discloses a real-time monitoring and early warning method for the leakage state of a long-line type public facility, and relates to the technical field of monitoring and early warning of the leakage state of the long-line type public facility, and the method specifically comprises the following steps: analyzing environment dynamic response information stored in a central monitoring system; respectively generating a soil humidity change coefficient, an environment pressure response index and a temperature influence compensation coefficient; constructing a leakage risk assessment model for the generated soil humidity change coefficient, the environment pressure response index and the temperature influence compensation coefficient, and generating a leakage risk coefficient; and determining a preset leakage risk coefficient threshold value, comparing the determined leakage risk coefficient threshold value with the generated leakage risk coefficient, evaluating whether a leakage risk exists in the pipe gallery area close to the earth surface, and respectively generating a normal signal and an abnormal signal according to an evaluation result. According to the invention, the problem of underground pipe gallery leakage monitoring is solved, abnormal signals are accurately distinguished, and the monitoring accuracy and safety are improved.

A gas measuring device (100) and a gas measuring process measure a concentration of a target gas. A detector detection variable sensor (12.1) measures a detection variable (U10) of a detector, which detector detection variable correlates with the concentration of the target gas in a gas sample (Gp). A compensator detection variable sensor (12.2) measures a detection variable (U11) of a compensator, wherein this compensator detection variable correlates less with the target gas concentration. The gas measuring device can be operated in a pressure-compensating mode and / or in a humidity-compensating mode. In pressure-compensating mode, the influence of the ambient pressure on a measurement result is compensated as best as possible under the boundary condition that the influence of the ambient humidity remains sufficiently small. In humidity-compensating mode, the influence of the ambient humidity on a measurement result is compensated as best as possible under a corresponding boundary condition.

The invention discloses a low-power-consumption high-precision well deviation measuring system and an implementation method thereof, and relates to the field of oil well drilling detection, the system comprises an underground sensor module, a single-chip microcomputer microprocessor and an upper computer module, and the upper computer module is used for executing the following operations: according to the underground environment temperature and the underground environment pressure, calculating the underground environment temperature and the underground environment pressure; the borehole acceleration, the borehole geomagnetic field direction and the borehole angular velocity are compensated and calibrated, the real-time measured hole drift angle and the real-time measured azimuth angle are calculated to update the borehole measurement trajectory, and the borehole measurement trajectory is determined by calculating the trajectory deviation degree between the borehole measurement trajectory and the drilling operation design trajectory. Determining a target sensor sampling frequency matched with the trajectory deviation degree; the single-chip microcomputer microprocessor is used for adjusting the working frequency of the MEMS sensing unit according to the sampling frequency of the target sensor. Therefore, under the condition that the measurement precision is not sacrificed, the energy consumption of the well deviation measurement system can be greatly reduced, and the data reliability and long-term stability are improved.

The invention discloses a coal seam gas content determination method. The method comprises the following steps: collecting a coal sample and placing the coal sample in a coal sample closed desorption container for closed normal-pressure desorption; opening the corresponding branches based on the change of the gas flow; working condition flow data and corrected gas flow data in the standard state are determined based on the laminar flow sensors on the branches and measurement data of the environment temperature sensor and the environment pressure sensor, and then the loss amount is calculated; the coal sample crushing device crushes the coal sample, and the corresponding branch is opened again based on the change of the gas flow until the desorption work is stopped; based on measurement data of each sensor, the coal sample mass is calculated to finally determine the coal seam gas content. The parameters such as the temperature, the pressure and the pressure difference of fluid flowing through the laminar flow sensor are measured in real time, the flow in a standard state is obtained after calculation and correction, and the measured gas flow and volume data are more scientific and accurate through temperature and pressure compensation.

The present invention specifically relates to a correction control method for calculating the fuel injection amount at different altitudes of a port injection engine, a pressure correction control method for optimizing the fuel injection amount under different environmental pressures, a correction curve of the intake manifold pressure and the oil rail pressure difference is creatively introduced in the model calculation, and the correction value at different altitudes and different intake manifold pressures is accurately calibrated to ensure that the air-fuel ratio can be controlled at a theoretical optimal level at different altitudes. The present invention is based on a large amount of road test data, including measurements at different ambient temperatures and different altitudes. Through big data statistical cluster analysis, it is found that the key factor affecting the accurate calculation of the fuel amount of the port injection engine is the pressure difference between the oil rail pressure and the intake manifold. Through this method, on the one hand, the fuel economy at high altitudes can be reduced, while ensuring high power output in plateau environments.

The invention discloses an open-loop and closed-loop transition method and device for temperature control of a wafer rapid heating process, and the method comprises the steps: carrying out the initial heating of a wafer in an open-loop mode, and achieving an initial temperature baseline; then a low-temperature closed-loop PID control method is implemented, the temperature rise speed of each temperature measurement point is calculated and compared with a preset target temperature rise speed, and a PID control strategy is designed based on the temperature rise speed difference so that the heating rate can be adjusted, and the temperature rise speed can smoothly reach the target value; designing a PID reference curve to adjust the temperature of the outer ring of the wafer, and correcting the temperature of the outer ring of the wafer; and according to different wafer characteristics and ambient pressure changes, PID reference curves of open-loop and closed-loop transition stages are automatically adjusted. According to the method, the problem that the radiance of the wafer is reduced in the open-loop and closed-loop transition stage in the rapid wafer heating process is solved, the temperature value is corrected, the curve is designed to be smooth, the radiance of the wafer is more stable than that of an original process, and the method has certain universality.

The present disclosure provides a vertical furnace. The vertical furnace comprises a furnace tube, a storage device, a loading device, a wafer boat, a first carrying device, a second carrying device and a gas system. A furnace chamber used for heating a wafer is arranged in the furnace tube. The storage device is provided with a storage chamber and a carrying table located in the storage chamber, and the carrying table is used for carrying a wafer box. The loading device is used for loading a wafer box for storing a wafer to be heated. The wafer boat is used for moving a wafer to be heated between the furnace chamber and the loading device. The first carrying device is used for moving the wafer box between the carrying table and the loading device. And the second carrying device is used for moving the to-be-heated wafer between the loading device and the wafer boat. And the gas system comprises a gas inlet port and a gas outlet port which are arranged on the carrying table, and is used for introducing protective gas into the wafer box through the gas inlet port and discharging the gas from the wafer box through the gas outlet port so as to inject the protective gas of which the pressure is greater than the environmental pressure into the wafer box. Consequently, pollutants in the environment can be prevented from making contact with the wafer, and the interior of the wafer box is clean.

Methods, apparatuses, and systems for mechanically releasing a predetermined amount of supplemental oxygen to a user via a mechanical initiator are disclosed with the release of the amount of supplemental oxygen based on and in response to the combined factors of a user's determined oxygen consumption based on sensing a user's inhalation combined with determining the ambient pressure in the area of the user.

The invention discloses a pressure measurement purging switching device for a dust environment, and the device comprises an installation housing which is internally provided with a two-position three-way solenoid valve, a time relay, a selection switch, and a far-end wiring terminal. The two-position three-way electromagnetic valve is provided with a first connector used for being connected with a purging pipeline, a second connector used for being connected with a pressure measuring instrument, a third connector used for being connected with a pressure taking pipeline and a valve rod, and the valve rod moves in the two-position three-way electromagnetic valve so that the third connector can be communicated with the first connector or the second connector. And the two-position three-way electromagnetic valve is connected with a time relay or a far-end wiring terminal through a selective switch. A control system connected with a time relay or a far-end wiring terminal is used for switching interfaces communicated with the interior of the two-position three-way electromagnetic valve at regular time, so that the pressure tapping pipeline is purged at regular time, and stable operation of dust environment pressure detection is ensured.

The invention provides a gas-liquid hole cavity characteristic frequency checking method, device and equipment, and the method comprises the steps: predicting a shear oscillation frequency interval of a gas-liquid hole cavity according to the prediction range of the environment flow velocity outside the gas-liquid hole cavity; predicting a structural inherent frequency interval, a liquid cavity modal frequency interval, a gas cavity modal frequency interval and a sloshing frequency interval of the gas-liquid hole cavity by referring to a prediction range of a gas volume ratio in the gas-liquid hole cavity; the piston frequency interval of the gas-liquid hole cavity is predicted by referring to the prediction range of the gas volume ratio in the gas-liquid hole cavity and the prediction range of the environment pressure outside the gas-liquid hole cavity; and checking whether each of the structure inherent frequency interval, the liquid cavity modal frequency interval, the air cavity modal frequency interval, the sloshing frequency interval and the piston frequency interval meets the safety margin requirement relative to the shear oscillation frequency interval or not. According to the invention, the characteristic frequency of the gas-liquid pore cavity is checked, so that the problem of pore cavity resonance of a ship under common working conditions is avoided.

A separation station (1) comprising a plurality of separation units (34) for separating carbon dioxide and / or water vapor from ambient air, each separation unit (34) having at least one continuous sealing peripheral wall surrounding at least one cavity (24) in the circumferential direction, said at least one continuous sealing peripheral wall defining an upstream opening (35) and an opposite downstream opening (36), said cavity (24) preferably containing at least one gas adsorption structure (25) for adsorbing said at least one gaseous component under ambient pressure and / or ambient temperature conditions, said plurality of separation units (34) being arranged in at least one substantially vertical collector device wall structure (2) surrounding a single common separation station cavity (21) in the lateral direction, said separation station cavity (21) being covered and closed at the upper side by at least one cover unit (1) provided with at least one air propulsion device (10).

Described herein is a safety and support system for a fuel cell module comprising: a pressure-tight safety casing for enclosing the fuel cell module and for containing a fluid; a fuel supply system, arranged to transport fuel to the fuel cell module from an external source; an air supply system, arranged to transport air to the fuel cell module from an external source, an exhaust system, arranged to transport exhaust fluids from the fuel cell module out of the safety casing, and a casing atmosphere system comprising: an inlet into the safety casing having an inlet valve, an outlet from the safety casing having an outlet valve, means for evacuating the fluid from the safety casing through the outlet, and a pressure sensor, arranged for measuring a pressure of the fluid inside the safety casing, wherein the casing atmosphere system is arranged to maintain a below ambient pressure inside the safety casing. Also described herein is a method for preventing an explosive atmosphere inside a safety casing and a fuel cell system for marine applications.

The invention discloses a quick response reversing assembly applied to a portable air inflation device, relates to the technical field of air inflation devices, and aims at improving a ventilation pipe in the air exhaust action on the basis of the air suction / exhaust action of a piston pump, namely changing the communicating / blocking state in the ventilation pipe through the rotating action of a ventilation rotating ball on the basis of the ventilation rotating ball. On the basis, an improvement scheme about a single-pass ring pipe and a two-pass ring pipe is provided, arc-shaped sliding blocks are arranged in the two-pass ring pipe, when the ventilation rotating ball is switched to block the ventilation pipe, the first arc-shaped sliding block in the single-pass ring pipe accelerates the ventilation rotating ball to recover the blocking action with the high pressure difference as power, and the second arc-shaped sliding block in the two-pass ring pipe accelerates the ventilation rotating ball to block the ventilation pipe. Furthermore, the influence process on the environmental pressure in the dynamic bin when the arc-shaped sliding block I slides is utilized, and a rubber leather sheath arranged in the air vent is utilized to further accelerate plugging, so that the situation that the inflation efficiency is reduced due to high pressure difference is avoided in a high-reaction-capacity action mode; and secondly, the purpose of indirectly controlling the inflation / deflation action is achieved through the two-way ring pipe.

The present application relates to hydrogen leakage intelligent early warning technical field, a kind of intelligent early warning method and system based on hydrogen leakage dangerous degree in industrial production, method includes: in hydrogen leakage historical data set sequentially extracting hydrogen leakage historical data, using interval leakage concentration difference, leakage ambient temperature, leakage ambient humidity, leakage ambient pressure and target leakage concentration to train initial BP neural network, obtain target BP neural network, judge whether current hydrogen concentration is greater than first leakage concentration, if greater than, according to first leakage concentration and second leakage concentration calculate current leakage concentration difference, current leakage concentration difference, current ambient temperature, current ambient humidity and current ambient pressure are input into target BP neural network, obtain predicted leakage concentration, judge whether predicted leakage concentration is greater than early warning leakage concentration, if greater than, hydrogen leakage intelligent early warning is carried out.The present application can solve the problem that the monitoring precision is low and the monitoring effect is poor in the current hydrogen concentration monitoring.

The invention discloses a method and system for analyzing factors influencing radial expansion of flash jet flow of an oil injector, and relates to the field of oil injectors. Flash evaporation spraying images of the single-hole oil sprayer under different thermal working conditions are collected; the thermal working condition comprises injection temperature and environment pressure; obtaining a spraying width within a preset axial distance from a nozzle outlet according to the flash evaporation spraying image; establishing a nucleation rate model according to the injection temperature and the environment pressure; determining a nucleation rate index according to the nucleation rate model; taking the spray width as a measurement index of radial expansion, and establishing an incidence relation between the spray width and a nucleation rate index; according to the incidence relation, determining a factor influencing radial expansion: when the spray width is increased along with the increase of the nucleation rate index, the influence factor is the nucleation rate; when the spray width tends to be stable along with the increase of the nucleation rate index, the influence factor is heat energy required by vaporization.

A method and apparatus for performing post-exposure bake operations is described herein. After exposure of photoresist on a substrate, the substrate is heated during a baking process to facilitate protection of the resist. The baking process is performed in a vacuum environment at sub-atmospheric pressures. After baking at reduced pressure, the substrate is cooled. The cooling process is performed at sub-atmospheric pressures. Further development of the resist is performed at ambient pressures.

Systems, devices, and methods for a gas sensor comprising one or more optical cells; a processor having addressable memory, the processor configured to: detect gas from the one or more optical cells of the gas sensor, where the detected gas is one or more of: methane, carbon dioxide, hydrogen sulfide, water, ammonia, sulfur oxides, and nitrogen; record data corresponding to the detected gas, where the recorded data comprises at least one of: an ambient temperature from a temperature sensor, an ambient pressure from a pressure sensor, an aerial vehicle telemetry, and an aerial vehicle location from a global positioning system (GPS); and generate a map of atmospheric greenhouse gas concentration on a map based on the detected gas and the recorded data.

The invention relates to a pressure sensor (10) for measuring ambient pressure, comprising a first pressure measuring element (12) with a first cavity (16) and at least one first deflection element (20) spanning at least section by section over the first cavity (16) and deflectable in a normal direction (18) depending on the ambient pressure, a second pressure measuring element (14) with a second cavity (44) and at least one second deflection element (46) spanning at least section by section over the second cavity (44) and deflectable in the normal direction (18) depending on the ambient pressure, wherein the second deflection element (46) comprises the first pressure measuring element (12) and a peripheral deflection region (48) adjacent to the first pressure measuring element (12), wherein the second cavity (44) overlaps the first cavity (16) at least section by section with respect to the normal direction (18),wherein the first deflection element (20) has a smaller material thickness than the edge-side deflection area (48).

The embodiment of the invention provides a speed reducer used for underground driving and an underground tool assembly. The speed reducer comprises an input shaft, an output shaft and an output shaft, an output shaft; a gear train disposed between the input shaft and the output shaft and providing a first power transmission path having a first gear ratio and a second power transmission path having a second gear ratio greater than the first gear ratio; a pressure sensing part of the pressure driving assembly is exposed in the underground environment outside the speed reducer to sense the environment pressure, and the pressure driving assembly is configured to drive the speed reducer to rotate by means of force generated by the environment pressure when the environment pressure exceeds a preset pressure threshold value. The gear train is automatically switched from operating through the first power transmission path to operating through the second power transmission path.

Systems, devices, and methods for a gas sensor comprising one or more optical cells; a processor having addressable memory, the processor configured to: detect gas from the one or more optical cells of the gas sensor, where the detected gas is one or more of: methane, carbon dioxide, hydrogen sulfide, water, ammonia, sulfur oxides, and nitrogen; record data corresponding to the detected gas, where the recorded data comprises at least one of: an ambient temperature from a temperature sensor, an ambient pressure from a pressure sensor, an aerial vehicle telemetry, and an aerial vehicle location from a global positioning system (GPS); and generate a map of atmospheric greenhouse gas concentration on a map based on the detected gas and the recorded data.

The present invention discloses a stable powder supply method and device suitable for a variable cross-section powder storage section, which belongs to the field of fluidized powder conveying. The structure of the powder supply device of the present invention is basically the same as the existing structure, and the powder storage section has an irregular cross-section; a plurality of slide rails are arranged along the inner wall of the powder supply device; the flexible dense membrane is connected to the guide rail on the circumferential outer side and fixed at the end of the slide rail, that is, fixed at the end of the powder supply device; the powder supply gas enters the powder storage section from the powder supply gas inlet of the powder storage cover, and forms a small pressure difference inside the upstream of the powder storage section, pushing the slider to move; under the action of the pressure difference between the powder supply gas pressure of the powder storage section and the target environmental pressure, the flexible dense membrane moves downstream to push the powder; through the movement of the slider on the guide rail, it is ensured that the flexible dense membrane is always in contact with the powder body, and the slider, the flexible dense membrane and the powder move together. The present invention provides more space selection margin for the design of aircraft using powder engines.

The invention discloses a high-temperature-resistant, high-pressure-resistant and high-sulfur-resistant special shock-resistant pressure gauge, and relates to the technical field of pressure gauges. The device comprises a pressure measuring pipeline, a piston pressure column, a force sensing resistor, a stress top frame and a heat dissipation and self-cleaning device. And the piston pressure column is connected with the force sensing resistor and the stress top frame, so that pressure dual redundancy measurement is realized. The heat dissipation system comprises an inner side heat dissipation sheet, an outer heat dissipation sheet and a refrigeration secondary sheet, and the driving motor drives air flow to cool, so that the sensor is protected. And the self-cleaning function utilizes reverse airflow to remove dust, so that the maintenance cost is reduced. Isolation design prevents harsh environment from damaging electronic devices, and intelligent heat dissipation adjustment adapts to various working conditions. The problems that an existing pressure gauge is inaccurate in measurement, prone to damage and difficult to maintain are solved, and the pressure gauge is suitable for extreme environment pressure monitoring.

A safety negative pressure gas supply cylinder according to the present invention comprises a cylinder body, a pipeline structure, a first check valve, a second check valve, and an adsorbent. The cylinder body has an opening, and the space inside is used to store gas, and the gas forms a pressure lower than atmospheric pressure inside the cylinder body. The pipeline structure is disposed inside the cylinder body and communicates with the opening, and includes a first pipeline and a second pipeline. The first check valve is disposed in the first pipeline and has a first check valve opening pressure greater than atmospheric pressure. When the pressure of the external filling gas is greater than the opening pressure of the first check valve and the internal pressure, the external filling gas enters the cylinder body. The second check valve is disposed in the second pipeline and has a second check valve opening pressure. When the pressure of the gas inside the cylinder is greater than or equal to the opening pressure of the second check valve and the external ambient pressure, the stored gas flows out of the cylinder body. The adsorbent adsorbs and stores the gas.

A sensor apparatus may include a channel structure configured to couple with an external element and a fluid conduit, such that the channel structure may receive a fluid, at least partially drawn through the external element from an ambient environment, and direct the fluid through the fluid conduit. A sensor may generate sensor data indicating a flow rate of the fluid through the fluid conduit based on monitoring a variation in a pressure at a location in hydrodynamic contact with the fluid conduit and in relation to an ambient pressure of the ambient environment. The sensor apparatus may enable generation of improved topography information associated with flows of fluid drawn from the external element based on measuring a local pressure at the location in hydrodynamic contact with the fluid conduit and determining the ambient pressure based on monitoring the local pressure over time.

A gas pressure sensor 100 includes a squeeze-film damping structure 8 and a computing device. The squeeze-film damping structure 8 includes a first object 4 and a second object 10 capable of moving relative to the first object 4. A squeeze-film damping phenomenon occurs between the first object 4 and the second object 10. The computing device calculates an ambient pressure of the squeeze-film damping structure 8 from a thermal noise generated in the second object 10.

The invention relates to a method and a device (1) for in-situ determination of the tempering state of surfaces (3, 4, 5), wherein the degree of change of at least one surface (3, 4, 5) over time is determined under an applied electric field, and wherein the electric field between at least two surfaces (3, 4, 5) is regulated or controlled, and wherein the surfaces (3, 4, 5) are arranged in a common, gas-tight housing (2), with a gas pressure in the housing (2) lower than the ambient pressure of the housing (2). The determination of the tempering state takes place during the tempering process, and the tempering process is regulated or controlled and / or terminated according to the determined tempering state.

A vaporizer device may include a pressure sensor and an ambient pressure sensor. The pressure sensor may be configured to measure a first pressure in an air flow path in the vaporizer device. The ambient pressure sensor may be configured to measure a second pressure corresponding to an atmospheric pressure. The vaporizer device may further include a controller. The controller may be configured to transition the vaporizer device to a first standby mode when the first pressure is equal to or greater than the second pressure for a first threshold quantity of time. While the vaporizer device is in the first standby mode, the controller may be further configured to transition the vaporizer device to a second standby mode when the second pressure is a threshold quantity greater than the first pressure and no motion event is detected for a second threshold quantity of time.

The invention relates to a method and a device (1) for processing surfaces (3, 4, 5), wherein an electric field is applied between at least two surfaces (3, 4, 5) in a common gas-tight housing (2), at a gas pressure inside the housing (2) which is lower than the ambient pressure around the housing (2). The energy from the electric field supplied to each of the surfaces (3, 4, 5) is closed-loop or open-loop controlled.

The invention relates to a method for adsorption and desorption of carbon dioxide from gas streams, with heat recovery, comprising at least two chambers (12, 14) alternately configured for adsorption and desorption, containing an adsorption material (1), wherein for desorption the chamber (12, 14) is operated at a reduced pressure and a temperature higher than the ambient temperature, and for adsorption at a pressure higher than the ambient pressure and a temperature lower than the ambient temperature.

The invention provides a fuel injection quantity control method and device, a storage medium and electronic equipment. Vehicle operation information and a correction value of the fuel injection quantity of a fuel injector are obtained, and the vehicle operation information comprises the environment temperature, the environment pressure and the air inlet pressure; the correction value of the fuel injection quantity comprises a correction value of the fuel injection quantity in a first temperature range, a correction value of the fuel injection quantity in a second temperature range and a correction value of the fuel injection quantity in a first altitude range; under the condition that the air inlet pressure is larger than the air inlet pressure target value, if the air inlet pressure is larger than the air inlet pressure threshold value, the oil injection quantity of an oil injector is reduced to be within the preset range matched with the engine design power; and if the air inlet pressure is smaller than or equal to the air inlet pressure threshold value, the oil injection amount is adjusted to be within the corresponding range based on the environment pressure and the environment temperature, and the corresponding range is determined based on the corrected value of the oil injection amount. According to the scheme, the problem that it is difficult to guarantee that the engine power is within the design boundary range through the control strategy of the fuel injector fuel injection quantity is solved.