36 results about "Barograph" patented technology

Altimeters correct themselves by analysing pressure data to identify underlying climatic changes and modify sensed pressures accordingly to provide corrected altitude values. The detected underlying climatic changes are used to provide a barometer function independent of altitude changes.

An atmometer device comprises a porous evaporator member, a suction tube communicating water from a reservoir to the porous evaporator member, a sensor measuring a moisture characteristic of soil associated with a crop, a mechanism arranged for controllably varying a rate of evaporation of the water through the porous evaporator member responsive to the moisture characteristic measured by the sensor, and an indicator arranged to indicate water loss in the reservoir. By controlling rate of evaporation of the water through the porous evaporator member responsive to the measured moisture characteristic of the soil, the amount of water loss in the reservoir during the given time period more accurately reflects crop evapotranspiration.

The invention discloses a closed goaf mashgas three-dimensional seepage simulation device and a simulation method thereof, and belongs to the technical field of closed goaf mashgas seepage simulation. The device comprises a sealed box body, a permeability rate control system, a mashgas release system, a mashgas exhausting and mining system and a data acquisition system. The interior of the sealed box body adopts a high-rebound sponge for simulating a porous medium in a closed goaf; a cylinder array applies the pressure on the high-rebound sponge for controlling a distribution characteristic of the goaf permeability rate; methane is injected into different horizons of the sealed box body by the mashgas release system, to simulate different mashgas release sources; a steel slim tube is used for simulating a ground drilling well, and a wind speed sensor, a pipeline pressure sensor and a methane concentration sensor are adopted for monitoring the mashgas exhausting and mining amount and the mashgas exhausting and mining concentration of the simulated drilling well; a barograph and a methane concentration recorder are arranged for monitoring the gas pressure and the mashgas concentration of the interior of the simulated goaf. The device and the method can change a simulation scheme according to actual conditions, and have universal applicability.

The invention discloses an automatic stamping device for a guiding pipe assembly. The automatic stamping device comprises a support base, a controller, a stamping die, a stamping air cylinder, a guiding pipe connector feeding device, a guiding pipe connector conveying assembly, a guiding pipe feeding device, a guiding pipe positive and negative direction detecting and adjusting device and a guiding pipe rotating conveying assembly and further comprises a barometer used for detecting the barometric pressure in the stamping air cylinder, and a displacement sensor used for detecting the displacement distance of a push rod of the stamping air cylinder. The barometer and the displacement sensor are electrically connected with the controller. The automatic stamping device has the beneficial effects that the barometer used for detecting the barometric pressure in the stamping air cylinder and the displacement sensor used for detecting the displacement distance of the push rod of the stamping air cylinder are additionally arranged; the controller can determine that the guiding pipe assembly which is stamped to be qualified is obtained only under the condition that the received barometric pressure obtained through detection of the barometer and the received displacement value measured through the displacement sensor conform to set conditions; and an obtained product is unqualified in the condition that the barometric pressure value is too high or the barometric pressure value is too low or the displacement value is too high or the displacement value is too low.

A compact air pressure gauge assembly mountable to the valve stem of a inflatable tire or mountable through the rim of a wheel for continuous monitoring of the tire inflation pressure. The air pressure gauge assembly has a compact design to extend the valve stem or wheel rim relatively little to avoid curb contact and interference with the wheel balance. By positioning the air intake in a right angle with the opening for receiving a standard valve stem or by positioning the air intake straight across the opening for receiving the valve stem while the dial face is positioned in an right angle, the air intake is separated from the airtight chamber housing the sensing element. A diaphragm having a simple mechanical design is provided as sensing element. The diaphragm includes a membrane being connected with a pressure indicator that moves up and down according to the tire pressure. The compact air pressure gauge assembly is designed to withstand substantial impact and to seal the tire in case the gauge body is accidentally broken off or fractured. Furthermore, the compact air pressure gauge assembly is relatively inexpensive, reliable, and of little or no maintenance.

An air pressure gauge assembly mounted to the valve stem of a tire for continuous monitoring of the tire inflation pressure without interfering with the common function of a valve stem, and an air pressure gauge assembly permanently mounted to the rim of a wheel for continuous monitoring of the tire inflation pressure. The valve stem mountable, flow-through air pressure gauge assembly offers the convenience of being mounted to an existing valve stem and still allowing inflation or deflation of the tire therethrough while continuously displaying the air pressure. The air pressure gauge assembly mountable through the wheel rim of an inflatable tire allows the continuous monitoring of the air pressure without interfering with the operation of a tire valve stem and replacement of a tire or a valve stem. Both types of air pressure gauge assemblies are designed to withstand substantial impact and to seal the tire in case the gauge body is accidentally broken off or fractured. Both types of air pressure gauge assemblies include several variations of easy to read dial faces. Furthermore, both types of air pressure gauge assemblies are of compact design and relatively inexpensive, reliable, and of little or no maintenance.

A test device, which is used for measuring geomembrane bloating deformation mechanical properties for film mulch seepage proofing in the fields of water conservancy plain reservoirs, municipal refuse landfill fields and the like, is disclosed. The test device allows a geomembrane bloating deformation mechanical property test and can be used for testing air pressure in a container and burst pressure of a geomembrane, wherein the top height of geomembrane bloating deformation can be automatically measured through a laser ranging sensor, and further a stress-strain relationship curve of the geomembrane bloating deformation can be obtained. The geomembrane bloating deformation mechanical test device is composed of three parts: an bloating deformation apparatus, a pressurizing apparatus and a test and control system, wherein the bloating deformation apparatus includes a container under the membrane and a constraint flange above the membrane and is characterized in that a geomembrane sample is arranged between the container under the membrane and the constraint flange above the membrane, wherein the geomembrane is constrained by the flange annularly. The pressurizing apparatus is used for supplying compressed air source with a pneumatic pump and can be regulated. The test and control system is mainly used for measuring the air pressure in the container under the membrane by means of an air pressure meter and automatically measuring the top height of the geomembrane bloating deformation with the laser ranging sensor.

A test device, which is used for measuring geomembrane bloating deformation mechanical properties for film mulch seepage proofing in the fields of water conservancy plain reservoirs, municipal refuse landfill fields and the like, is disclosed. The test device allows a geomembrane bloating deformation mechanical property test and can be used for testing air pressure in a container and burst pressure of a geomembrane, wherein the top height of geomembrane bloating deformation can be automatically measured through an electronic ruler (such as a capacitive grating or an optical grating), and further a stress-strain relationship curve of the geomembrane bloating deformation can be obtained. The geomembrane bloating deformation mechanical test device is composed of three parts: an bloating deformation apparatus, a pressurizing apparatus and a test and control system, wherein the bloating deformation apparatus includes a container under the membrane and a constraint flange above the membrane and is characterized in that a geomembrane sample is arranged between the container under the membrane and the constraint flange above the membrane, wherein the geomembrane is constrained by the flange annularly. The pressurizing apparatus is used for supplying compressed air source with a pneumatic pump and can be regulated. The test and control system is mainly used for measuring the air pressure in the container under the membrane by means of an air pressure meter and automatically measuring the top height of the geomembrane bloating deformation with the electronic ruler (such as the capacitive grating or the optical grating).

The invention discloses an air pressure sensor protection structure, an air pressure gauge and an unmanned aerial vehicle (UAV). The air pressure sensor protection structure comprises a protective cover and a slow flow medium; the protective cover comprises a cover body and a plurality of spacer plates; the cover body is provided with at least two air inlet holes and is internally provided with acavity; the spacer plates are fixedly connected with the cover body; a cavity is divided into a pressure measuring cavity and a plurality of slow flow cavities by means of the spacer plates; the spacer plates are separately provided with an air flow channel. By means of the interaction between air flows entering the protective cover through the different air inlet holes and the multi-stage slow flow action of the slow flow cavity and the slow flow medium, the interference of the air flow changes on an air pressure sensor can be effectively reduced, so that the measurement accuracy of the air pressure sensor can be ensured.

The invention relates to an intelligent digital air pressure gauge based on an AVR single-chip microcomputer. The intelligent digital air pressure gauge is composed of an air pressure sensor 102, an amplifier 103, the AVR single-chip microcomputer 105, an A/D converter 104, a temperature sensor 107, a clock circuit 108, a communication circuit 109, an EEPROM memorizer 110, a keyboard 111, an LED digital displayer 112 and the like. The intelligent digital air pressure gauge is characterized in that under the influence of changes of temperature, a magnetic field and other complex environment factors, the AVR single-chip microcomputer is adopted, output signals of the pressure sensor are processed based on an intelligent optimization technology, temperature compensation of the pressure signals is achieved, and measurement precision of the digital air pressure gauge is improved. According to the intelligent digital air pressure gauge, the detection requirements of being easy to use, high in intelligence degree, high in measurement precision, small in size and convenient to carry are met.

The invention provides a method for verifying the welding quality of an MEMS microphone. The method comprises the following steps: fixing an airtight tool to the MEMS microphone, wherein the airtighttool comprises a piston and a push rod connected with the piston, the piston corresponds to a sound hole of the MEMS microphone, and the airtight tool is used for compressing the air in a package structure of the MEMS microphone; testing the air pressure in the package structure through a barometer module arranged in the package structure; judging the welding quality of the MEMS microphone according to an air pressure change value obtained by the test of the barometer module and a preset air pressure; if the air pressure change value obtained by the test of the barometer module is greater thanthe preset air pressure, indicating that the welding quality of the MEMS microphone is qualified; and if the air pressure change value obtained by the test of the barometer module is less than the preset air pressure, indicating that the welding quality of the MEMS microphone is unqualified. According to the method provided by the invention, the problems that welding cracks are generated and thatdelamination is difficult to find in the existing welding quality inspection methods can be solved.

The invention discloses a barograph. The barograph is an air pressure collection and storage system based on an STM32 microprocessor platform, realizes high-capacity data collection, and adopts a thin film switch to realize soft start operation of keys; and adopts an MS5803-01BA digital baroceptor to precisely sense air pressure change in a parachute system falling process, thereby obtaining a relation between altitude and time and a relation between falling speed and time.

A smartphone-operated air pressure meter and system includes an air pressure meter having a pair of input channels that are each connected to a pressure chamber and pressure sensor. A control unit is included with the pressure meter for receiving air pressure data and for transmitting the same. The system also includes an airflow balancing application that generates one or more application icons, and calculates airflow information. The airflow information can include the received pressure data alone, or pressure data that has been applied to a mathematical algorithm, along with environmental data.

The invention provides a coal mine underground roadway air pressure difference synchronous rapid determination method, which comprises the following steps: selecting a roadway air pressure measurementroute and measurement points according to a coal mine underground ventilation system, and numbering all measurement points; selecting two barometers; first measuring personnel carrying the first barometer to go to a measuring point i, and second measuring personnel carrying the second barometer to go to a measuring point i+1 from the measuring point i; measuring the air pressure value of the points after the first measuring personnel and the second measuring personnel reach the appointed measuring points; repeating the measurement until the measurement of all the measurement points is completed; and exporting measurement data of the first barometer and the second barometer, screening and marking data, and calculating to obtain an air pressure difference deltaP of adjacent measurement points in the roadway. Communication is carried out in a manner that measuring personnel drag the string, synchronous measurement of the air pressure difference of the underground roadway of the coal mineis realized, and the method has the beneficial effects of low input cost, simplicity and convenience in operation, high measuring speed and accurate measured data.

The invention discloses a civil defense equipment airtightness detection platform, comprising civil defense equipment, a pressure measurer, a flow meter and a pull bar; the civil defense equipment is connected with a platform through bolts to form a closed hyper-pressure chamber, ball valve I is connected to one side of the closed hyper-pressure chamber, ball valve II, ball valve III and ball valve IV are mounted sequentially on the other side of the closed hyper-pressure chamber, the flow meter is serially connected between the ball valve I and the closed hyper-pressure chamber, an end of the ball valve I is connected with an air compressor on the platform, an end of the ball valve II is connected with a barometer, an end of the ball valve III is connected with a thermometer, an end of the ball valve IV is connected with the pressure measurer, the pressure measurer comprises a micro-differential pressure transmitter and a computer, the computer is connected with the micro-differential pressure transmitter, and the pull bar is connected at one end with the civil defense equipment and connected at the other end with the platform.

The invention relates to a novel barometer. The novel barometer comprises a barometer body and is characterized in that the bottom of the barometer body is provided with a tumbler base made of rubber materials, the tumbler base has a very good buffering effect so that the barometer body can be prevented from bumping when placed by people, a power supply is arranged in the barometer body, a switch is arranged outside the barometer body, an electrical heating element is arranged in the upper surface layer of the barometer body, and the power supply is connected with the switch and the electrical heating element through wires. When the upper surface layer of the barometer body frosts in cold weather, the switch is turned on so that the electrical heating element can be used for heating the upper surface layer of the barometer body.

A barometer with multi-functions of measurement and depressurization has a body, an intake set, an exhaust set, a depressurizing set and a pressure meter. The intake set is mounted on a side of the body. The exhaust set and the depressurizing set are mounted on the body and aligning with the intake set. The pressure meter is mounted on a top surface of the body. The body has an inner channel communicating with the intake set, the exhaust set, the depressurizing set and the pressure meter. Thus, the functions of inflating, pressure measuring, depressurization and re-inflating can be accomplished by the barometer for eliminating the inconvenience of frequent installing and removing an inflation apparatus, a depressurization device and a pressure meter.