CN106353030A - Reference atmospheric pressure based micro-overpressure detection method and detection device - Google Patents
Reference atmospheric pressure based micro-overpressure detection method and detection device Download PDFInfo
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Abstract
The invention relates to a reference atmospheric pressure based micro-overpressure detection method. A differential pressure transmitter compares a received reference cabin pressure with the atmospheric pressure and outputs and displays a reference micro-overpressure difference value in real time; a data processor receives an atmospheric absolute pressure signal, a cabin absolute pressure signal and the reference micro-overpressure difference value, compares the atmospheric absolute pressure signal with the cabin absolute pressure signal, outputs and displays an absolute reference micro-overpressure difference value in real time, comparatively analyzes the reference micro-overpressure difference value and the absolute reference micro-overpressure difference value, and corrects the atmospheric absolute pressure signal in real time as a reference atmospheric pressure digital signal; each micropressure detector compares received cabin pressure with the reference atmospheric pressure, outputs and displays a micro-overpressure value of each cabin, outputs respective pressure difference values to an upper computer and alarms when the micro-overpressure value of each cabin exceeds high- and low-pressure alarming set values. The reference atmospheric pressure based micro-overpressure detection method has advantages of structural reasonability, convenience in operation and improvement of accuracy in overpressure detection of cabins.
Description
Technical field
The present invention relates to a kind of micro- superpressure detection method based on atmospheric reference pressure and its detection means, belong to micro- superpressure detection technique field.
Background technology
In some specific sealing spaces, as specific sealing space environment such as highly ultra-clean medicament compartment, the aseptic operating room of anti-virus entrance, ship storehouses, toxic and harmful for making outdoor cannot be introduced into interior, so interior must be made to remain the relatively outdoor ultra-miniature pressure exceeding below 800pa, make indoor occupant in the case of bearing slight pressure, still can be normally carried out work and life.For on the locular wall of this these sealing space, blow vent is installed, and on blow vent or breather, automatic ultra-micropressure pressure limiting adjusting valves are installed, when indoor pressure exceedes the minute-pressure of setting, automatically open up valve, automatically reduced pressure, or periodically room air is changed, to keep office work personnel energy long-term work and life, and when outdoor has harmful dusty gass, then need quick closedown blow vent.
It is that pressure to each cabin is measured in real time, minute-pressure difference detecting instrument for measuring cabin pressure would generally be installed in each cabin, one sampling end of minute-pressure difference detecting instrument is connected with the trachea being arranged on in emergency chamber, the pressure in each cabin of real-time reception as high-voltage signal, and another sampling end of minute-pressure difference detecting instrument is connected with atmospheric pressure pipeline, and the other end of this atmospheric pressure pipeline is disposed in the outdoor and communicates with air, using the real-time atmospheric pressure of collection cabin exterior and as low-voltage signal, minute-pressure difference detecting instrument receives cabin pressure and atmospheric pressure and shows micro- superpressure value after being contrasted.And mainly adopt metal tubes currently used for the atmospheric pressure outside using cabin, when having multiple cabin, it is at corresponding minute-pressure difference detecting instrument metal tubes being connected in each detection cabin, atmospheric pressure is inputted to the thief hatch of each minute-pressure difference detecting instrument, due to each cabin is introduced atmospheric pressure into using metal road pipe, therefore exist that pipeline length, pad be many, constructional difficulties, easily leakage, the phenomenons such as condensed water, blocking can be produced in pipeline, and directly affect the accuracy of each cabin micro- superpressure detection.Secondly as the difference such as the front and back position in cabin, height, need for metal road pipe to cause different positions and height, the atmospheric pressure change therefore being gathered is larger, also directly affect the accuracy of cabin micro- superpressure detection.It is also at present that barometric pressure sensor is set in cabin exterior, gather atmospheric pressure by barometric pressure sensor and deliver in the pressure difference detector in each cabin, to detect the pressure condition in cabin.Although the problems such as this structure can solve constructional difficulties, but pressure transducer is generally arranged at cabin exterior, it is subject to blast in the process of moving, the environmental change such as humidity and temperature affects, and the height and position difference that pressure transducer is placed, the atmospheric pressure that collection will be produced is different, therefore above-mentioned factor all can cause the atmospheric pressure fluctuation gathering larger, and itself pressure change of ultra-miniature pressure is relatively small, the scope of the detection pressure therefore being exceeded due to atmospheric pressure fluctuation, the accuracy of each cabin micro- superpressure detection can be affected, so not being suitable for micro-pressure-difference detection place.
Content of the invention
It is an object of the invention to provide a kind of rational in infrastructure, easy construction, improve the micro- superpressure detection method based on atmospheric reference pressure of accuracy and its detection means of cabin micro- superpressure detection.
The present invention is that the technical scheme reaching above-mentioned purpose is: a kind of micro- superpressure detection method based on atmospheric reference pressure it is characterised in that: carry out according to the following steps,
(1), there is a benchmark cabin and the benchmark sampling tube communicating with benchmark cabin, there is an atmosphere air sample tube communicating with air, benchmark sampling tube and atmosphere air sample tube connect two thief hatch of differential pressure transmitter, differential pressure transmitter is compared to the benchmark cabin pressure receiving and atmospheric pressure, export in real time and display benchmark micro- superpressure difference, and the signal input part of Bap Sens Barometric Absolute Pressure Sensor is communicated with atmosphere air sample tube, BAP Barometric Absolute Pressure signal is processed into the atmospheric pressure of collection, the signal input part of cabin absolute pressure transducer is communicated with benchmark sampling tube, cabin absolute pressure signal is processed into the benchmark cabin pressure of collection；
(2), data processor receives BAP Barometric Absolute Pressure signal and cabin absolute pressure signal, process is compared to BAP Barometric Absolute Pressure signal and cabin absolute pressure signal, export in real time and display absolute standard micro- superpressure difference, data processor receives benchmark micro- superpressure difference of benchmark differential pressure transmitter, analysis is compared to benchmark micro- superpressure difference and absolute standard micro- superpressure difference, BAP Barometric Absolute Pressure signal is revised in real time, revised BAP Barometric Absolute Pressure signal is supplied to each cabin as reference atmospheric pressure digital signal；
(3), the digital signal of reference atmospheric pressure is connected with the communication of each minute-pressure detector by data processor in real time by wired or wireless way, the each trachea that communicate corresponding with respective cabin connects the thief hatch of each self-corresponding minute-pressure detector, after each minute-pressure detector is to the cabin pressure receiving and reference atmospheric pressure contrast, export and show micro- superpressure value in each cabin in real time, respective pressure difference is exported to host computer, when each cabin micro- superpressure value exceedes high-low pressure alarm setting value, corresponding minute-pressure detector sends police instruction.
Wherein: the atmosphere pressure signal gathering after a/d conversion process, is exported barometric absolute pressure digital signal to data processor by described Bap Sens Barometric Absolute Pressure Sensor.
The benchmark cabin pressure signals gathering after a/d conversion, are exported absolute standard cabin pressure digital signal to data processor by described cabin absolute pressure transducer.
The detection means based on micro- superpressure detection method of atmospheric reference pressure for the present invention it is characterised in that: include the multiple tracheas that communicate corresponding with respective cabin and the atmosphere air sample tube that cabin exterior communicates and atmospheric reference minute-pressure data collection processor and multiple minute-pressure detector corresponding with each cabin；
Described atmospheric reference minute-pressure data collection processor includes data processor, benchmark cabin, differential pressure transmitter and cabin absolute pressure transducer and Bap Sens Barometric Absolute Pressure Sensor, the benchmark sampling tube being communicated with benchmark cabin is installed in benchmark cabin, one input of the input of cabin absolute pressure transducer and differential pressure transmitter is connected with benchmark sampling tube and communicates, another input of the input of Bap Sens Barometric Absolute Pressure Sensor and differential pressure transmitter is connected with atmosphere air sample tube and communicates, differential pressure transmitter is used for benchmark cabin pressure is compared with atmospheric pressure, output and display benchmark micro- superpressure difference；The described outfan of cabin absolute pressure transducer, the outfan of Bap Sens Barometric Absolute Pressure Sensor and differential pressure transmitter outfan are connected with data processor, data processor is used for receiving BAP Barometric Absolute Pressure signal and cabin absolute pressure signal is compared process, exports in real time and display absolute standard micro- superpressure difference, again analysis is compared to benchmark micro- superpressure difference and absolute standard micro- superpressure difference, exports as reference atmospheric pressure digital signal after BAP Barometric Absolute Pressure signal is revised in real time；Described data processor outfan is passed through data wire or wireless communication module and is connected with the communication of each minute-pressure detector, phase breather corresponding with respective cabin is connected with the thief hatch of each self-corresponding minute-pressure detector, each minute-pressure detector is used for each self-corresponding cabin pressure and atmospheric reference pressure are contrasted, and exports and show micro- superpressure value in each cabin in real time.
Wherein: atmosphere air sample tube air inlet port is provided with air manostat, benchmark sampling tube is provided with benchmark cabin manostat in air inlet port, and the air inlet port of trachea is provided with cabin manostat.
The present invention is provided with a benchmark cabin and the benchmark sampling tube communicating with benchmark cabin and an atmosphere air sample tube communicating with air，Deliver in gas benchmark minute-pressure data collection processor and differential pressure transmitter by benchmark cabin pressure and atmospheric pressure and by respective pipeline，By differential pressure transmitter, benchmark cabin pressure and atmospheric pressure are compared，Export in real time and display benchmark micro- superpressure difference，Bap Sens Barometric Absolute Pressure Sensor and cabin absolute pressure transducer are communicated with atmospheric pressure and benchmark cabin pressure simultaneously，So BAP Barometric Absolute Pressure signal and cabin absolute pressure signal are processed into the atmospheric pressure and benchmark cabin pressure of collection，Process is compared to BAP Barometric Absolute Pressure signal and cabin absolute pressure signal by data processor、Show in real time and output absolute standard micro- superpressure difference，Analysis is compared to benchmark micro- superpressure difference and absolute standard micro- superpressure difference by data processor，BAP Barometric Absolute Pressure signal is revised in real time，Revised BAP Barometric Absolute Pressure signal is supplied to each cabin as reference atmospheric pressure digital signal.The present invention only needs to cause at differential pressure transmitter using an atmosphere air sample tube, and just can solve protoatmosphere sampling tube needs to cause at each minute-pressure detector, causes constructional difficulties and the atmospheric pressure inaccurate problem of sampling.The present invention is by being revised in real time to BAP Barometric Absolute Pressure signal, and the reference atmospheric pressure as each minute-pressure detector, the low-voltage signal that each minute-pressure detector input can be kept is consistent, solve interference effect during collection atmospheric pressure, can export and show micro- superpressure value in each cabin accurately, in real time.
Brief description
Below in conjunction with the accompanying drawings embodiments of the invention are described in further detail.
Fig. 1 is the theory structure schematic diagram of micro- superpressure detection means of atmospheric reference pressure of the present invention.
Fig. 2 is the theory structure schematic diagram of atmospheric reference minute-pressure data collection processor of the present invention.
Wherein: 1 benchmark cabin manostat, 2 benchmark sampling tubes, 3 atmospheric reference minute-pressure data collection processors, 3-1 cabin absolute pressure transducer, 3-2 Bap Sens Barometric Absolute Pressure Sensor, 3-3 data processor, 3-4 differential pressure transmitter, 4 air manostat, 5 atmosphere air sample tubes, 6 data wires, 7 minute-pressure detectors, 8 cabin manostat, 9 tracheas, 10 host computers.
Specific embodiment
Micro- superpressure detection method based on atmospheric reference pressure of the present invention, as shown in Fig. 1,2, sequentially includes the following steps:
(1), there is a benchmark cabin and the benchmark sampling tube 2 communicating with benchmark cabin, there is an atmosphere air sample tube communicating with air 5, benchmark sampling tube 2 and atmosphere air sample tube 5 connect two thief hatch of differential pressure transmitter 3-4, differential pressure transmitter 3-4 is compared to the benchmark cabin pressure receiving and atmospheric pressure, export in real time and display benchmark micro- superpressure difference, the present invention adopted differential pressure transmitter 3-4 is existing technology differential pressure transmitter, and an outfan of differential pressure transmitter 3-4 exports micro- for benchmark superpressure difference to data processor 3-3, micro- for benchmark superpressure difference is changed into and can be exported to host computer 10 with the standard current signal of reaction pressure difference 4-20ma simultaneously, as super Auto-control of Micro-pressure case or centralized displaying screen etc..
See Fig. 1, shown in 2, the signal input part of Bap Sens Barometric Absolute Pressure Sensor 3-2 of the present invention is communicated with atmosphere air sample tube 5, BAP Barometric Absolute Pressure signal is processed into the atmospheric pressure of collection, the signal input part of cabin absolute pressure transducer 3-1 is communicated with benchmark sampling tube 2, cabin absolute pressure signal is processed into the benchmark cabin pressure of collection, Bap Sens Barometric Absolute Pressure Sensor 3-2 of the present invention is by the atmosphere pressure signal gathering after a/d conversion process, export barometric absolute pressure digital signal to data processor 3-3, same cabin absolute pressure transducer 3-1 is by the benchmark cabin pressure signals gathering after a/d modular converter, export absolute standard cabin pressure digital signal to data processor 3-3.
(2)、Data processor 3-3 receives BAP Barometric Absolute Pressure signal and cabin absolute pressure signal，Process is compared to BAP Barometric Absolute Pressure signal and cabin absolute pressure signal，Export in real time and display absolute standard micro- superpressure difference，Show absolute standard micro- superpressure difference on the spot，Data processor 3-3 receives benchmark micro- superpressure difference of benchmark differential pressure transmitter 3-4，Analysis is compared to benchmark micro- superpressure difference and absolute standard micro- superpressure difference，BAP Barometric Absolute Pressure signal is revised in real time，The data processor 3-3 of the present invention is compared to the difference of benchmark micro- superpressure difference and absolute standard micro- superpressure difference、Analysis，The reason to judge difference，As when two pressure differences exceed ± 10pa，In real time absolute standard micro- superpressure difference is modified，Then again BAP Barometric Absolute Pressure signal is revised in real time according to the absolute standard revised micro- superpressure difference，Or directly according to the elimination difference data of inner setting, BAP Barometric Absolute Pressure signal is revised in real time，Revised BAP Barometric Absolute Pressure signal is supplied to each cabin as reference atmospheric pressure digital signal.
(3)、The digital signal of reference atmospheric pressure is communicated with each minute-pressure detector 7 by wired or wireless way and is connected by data processor 3-3 in real time，Reference atmospheric pressure digital signal can be reached and as low-voltage signal by each minute-pressure detector 7 using data wire or wireless communication module，This minute-pressure detector 7 is existing minute-pressure detector，The each trachea 9 that communicate corresponding with respective cabin is connected on the thief hatch of corresponding minute-pressure detector 7，I.e. each trachea 9 is connected to the high pressure thief hatch of corresponding minute-pressure detector 7，To gather to high-voltage signal micro- in emergency chamber，After each minute-pressure detector 7 is to the cabin pressure receiving and reference atmospheric pressure contrast，Export and show micro- superpressure value in each cabin in real time，Respective pressure difference is exported to host computer 10，When each cabin micro- superpressure value exceedes high-low pressure alarm setting value，Corresponding minute-pressure detector 7 sends police instruction，When micro- superpressure value is less than 150pa or is higher than 800pa，Police instruction is sent by alarm，Micro- superpressure is changed into and can be exported to host computer 10 with the standard current signal of reaction pressure difference 4-20ma by the present invention each minute-pressure detector 7，Host computer 10 can be super Auto-control of Micro-pressure case or centralized displaying screen etc.，Realize the micro- over pressure in each cabin is accurately measured.
As shown in Fig. 1,2, the detection means based on micro- superpressure of atmospheric reference pressure for the present invention, including the multiple tracheas 9 that communicate corresponding with respective cabin and the atmosphere air sample tube 5 that cabin exterior communicates and atmospheric reference minute-pressure data collection processor 3 and multiple minute-pressure detector 7 corresponding with each cabin.
As shown in Figure 2, the atmospheric reference minute-pressure data collection processor 3 of the present invention includes data processor 3-3, benchmark cabin, differential pressure transmitter 3-4 and cabin absolute pressure transducer 3-1 and Bap Sens Barometric Absolute Pressure Sensor 3-2, the benchmark sampling tube 2 being communicated with benchmark cabin is installed in benchmark cabin, by benchmark sampling tube 2, the pressure in benchmark cabin is reached in differential pressure transmitter 3-4, the present invention can be using any one cabin as benchmark cabin, therefore only need to guide at differential pressure transmitter 3-4 by an atmosphere air sample tube 5, convenient construction is installed.See Fig. 1、Shown in 2，One input of the input of cabin absolute pressure transducer 3-1 of the present invention and differential pressure transmitter 3-4 is connected with benchmark sampling tube 2 and communicates，Another input of the input of Bap Sens Barometric Absolute Pressure Sensor 3-2 and differential pressure transmitter 3-4 is connected with atmosphere air sample tube 5 and communicates，Differential pressure transmitter 3-4 is used for benchmark cabin pressure is compared with atmospheric pressure、Output and display benchmark micro- superpressure difference，Benchmark micro- superpressure difference can be shown on the spot，And the outfan of cabin absolute pressure transducer 3-1、The outfan of Bap Sens Barometric Absolute Pressure Sensor 3-2 and differential pressure transmitter 3-4 outfan are connected with data processor 3-3，The absolute cabin pressure signals of benchmark and BAP Barometric Absolute Pressure signal are processed into the benchmark cabin pressure receiving and atmospheric pressure by cabin absolute pressure transducer 3-1 and Bap Sens Barometric Absolute Pressure Sensor 3-2，After a/d modular converter，Obtain benchmark absolute cabin pressure digital signal and BAP Barometric Absolute Pressure digital signal，Data processor 3-3 is used for receiving BAP Barometric Absolute Pressure signal and cabin absolute pressure signal is compared process、Export in real time and display absolute standard micro- superpressure difference，Show absolute standard micro- superpressure difference on the spot，Data processor 3-3 is compared analysis to benchmark micro- superpressure difference and absolute standard micro- superpressure difference again，After BAP Barometric Absolute Pressure signal is revised in real time、Output is as reference atmospheric pressure digital signal.The data processor 3-3 of the present invention is after to benchmark, micro- superpressure difference is compared, analyzes with the difference of absolute standard micro- superpressure difference, the reason judge difference, in real time absolute standard micro- superpressure difference is modified, then again BAP Barometric Absolute Pressure signal is revised in real time according to the absolute standard revised micro- superpressure difference, or directly according to the elimination difference data of inner setting, BAP Barometric Absolute Pressure signal is revised in real time, the data processor 3-3 of the present invention adopts existing industrial computer or other processor.
As shown in Fig. 1,2, data processor 3-3 outfan of the present invention is passed through data wire 6 or wireless communication module and is connected with the communication of each minute-pressure detector 7, there is provided a unified low-voltage signal to each minute-pressure detector 7, the trachea 9 communicating with each cabin connects the thief hatch of each self-corresponding minute-pressure detector 7, the high-voltage signal in respective cabin is provided to each minute-pressure detector 7, each minute-pressure detector 7 is used for each self-corresponding cabin pressure and atmospheric reference pressure are contrasted, and exports and show micro- superpressure value in each cabin in real time.Pressure differential is changed into and can be exported to host computer 10 with the standard current signal of reaction pressure difference 4-20ma by the present invention each minute-pressure detector 7, the minute-pressure detector 7 of the present invention carries alarm, or be connected with alarm, after micro- superpressure value exceeds the micro- superpressure value setting, police instruction is sent by alarm.
As shown in Fig. 1,2, the data processor 3-3 of the present invention, differential pressure transmitter 3-4 and each minute-pressure detector 7 provide required running voltage by power module.
As shown in Fig. 1,2, the present invention is when gathering pressure, the fluctuation of pressure can be reduced, atmosphere air sample tube 5 is provided with air manostat 4 in air inlet port, benchmark sampling tube 2 is provided with benchmark cabin manostat 1 in air inlet port, and trachea 9 is provided with cabin manostat 8 in air inlet port, to gather metastable pressure, improve the accuracy of detection.
Claims (5)
1. a kind of micro- superpressure detection method based on atmospheric reference pressure it is characterised in that: carry out according to the following steps,
(1), be there is a benchmark cabin and the benchmark sampling tube (2) being communicated with benchmark cabin, there is one and communicate with air
Atmosphere air sample tube (5), connect differential pressure transmitter (3-4) two adopt for benchmark sampling tube (2) and atmosphere air sample tube (5)
Sample mouth, differential pressure transmitter (3-4) is compared to the benchmark cabin pressure receiving and atmospheric pressure, exports in real time and show
Benchmark micro- superpressure difference, and the signal input part of Bap Sens Barometric Absolute Pressure Sensor (3-2) communicated with atmosphere air sample tube (5),
BAP Barometric Absolute Pressure signal, the signal input part of cabin absolute pressure transducer (3-1) are processed into the atmospheric pressure of collection
Communicate with benchmark sampling tube (2), cabin absolute pressure signal is processed into the benchmark cabin pressure of collection；
(2), data processor (3-3) receives BAP Barometric Absolute Pressure signal and cabin absolute pressure signal, absolute to air
Pressure signal and cabin absolute pressure signal are compared process, export in real time and display absolute standard micro- superpressure difference, data
Processor (3-3) receives benchmark micro- superpressure difference of benchmark differential pressure transmitter (3-4), to benchmark micro- superpressure difference with definitely
Benchmark micro- superpressure difference is compared analysis, and BAP Barometric Absolute Pressure signal is revised in real time, will be absolute for revised air
Pressure signal is supplied to each cabin as reference atmospheric pressure digital signal；
(3), data processor (3-3) in real time by the digital signal of reference atmospheric pressure pass through wired or wireless way with each
Minute-pressure detector (7) communication connects, and each trachea (9) that communicate corresponding with respective cabin connects each self-corresponding minute-pressure detector
(7) thief hatch, after each minute-pressure detector (7) is to the cabin pressure receiving and reference atmospheric pressure contrast, defeated in real time
Go out and show micro- superpressure value in each cabin, respective pressure difference is exported to host computer (10), when each cabin micro- superpressure value surpasses
During too high low pressure alarming setting value, corresponding minute-pressure detector (7) sends police instruction.
2. the micro- superpressure detection method based on atmospheric reference pressure according to claim 1 it is characterised in that: described
Bap Sens Barometric Absolute Pressure Sensor (3-2) by gather atmosphere pressure signal after a/d conversion process, to data processor (3-3)
Output barometric absolute pressure digital signal.
3. the micro- superpressure detection method based on atmospheric reference pressure according to claim 1 it is characterised in that: described
After the benchmark cabin pressure signals gathering are changed by cabin absolute pressure transducer (3-1) through a/d, to data processor (3-3)
Output absolute standard cabin pressure digital signal.
4. the detection means of the micro- superpressure detection method based on atmospheric reference pressure according to claim 1, its feature
Be: include atmosphere air sample tube (5) that the multiple tracheas (9) that communicate corresponding with respective cabin are communicated with cabin exterior with
And atmospheric reference minute-pressure data collection processor (3) and multiple minute-pressure detector (7) corresponding with each cabin；
Described atmospheric reference minute-pressure data collection processor (3) includes data processor (3-3), benchmark cabin, differential pressure
Transmitter (3-4) and cabin absolute pressure transducer (3-1) and Bap Sens Barometric Absolute Pressure Sensor (3-2), benchmark cabin
The benchmark sampling tube (2) being communicated with benchmark cabin, the input of cabin absolute pressure transducer (3-1) and difference are inside installed
One input of pressure transmitter (3-4) is connected with benchmark sampling tube (2) and communicates, Bap Sens Barometric Absolute Pressure Sensor (3-2)
Input and another input of differential pressure transmitter (3-4) be connected with atmosphere air sample tube (5) and communicate, differential pressure transmitter
(3-4) it is used for benchmark cabin pressure is compared with atmospheric pressure, exports and shows benchmark micro- superpressure difference；Described cabin
The outfan of absolute pressure transducer (3-1), the outfan of Bap Sens Barometric Absolute Pressure Sensor (3-2) and differential pressure transmitter
(3-4) outfan is connected with data processor (3-3), and data processor (3-3) is used for receiving BAP Barometric Absolute Pressure letter
Number and cabin absolute pressure signal be compared processs, in real time output and show absolute standard micro- superpressure difference, more micro- to benchmark
Superpressure difference and absolute standard micro- superpressure difference are compared analysis, export after BAP Barometric Absolute Pressure signal is revised in real time
As reference atmospheric pressure digital signal；Described data processor (3-3) outfan passes through data wire (6) or channel radio
News module and each minute-pressure detector (7) communication is connected, phase breather (9) corresponding with respective cabin and each self-corresponding minute-pressure
The thief hatch of detector (7) is connected, and each minute-pressure detector (7) is used for each self-corresponding cabin pressure and atmospheric reference
Pressure is contrasted, and exports and show micro- superpressure value in each cabin in real time.
5. the detection means of the micro- superpressure detection method based on atmospheric reference pressure according to claim 4, its feature
It is: described atmosphere air sample tube (5) air inlet port is provided with air manostat (4), and benchmark sampling tube (2) is in air inlet
Port is provided with benchmark cabin manostat (1), and the air inlet port of trachea (9) is provided with cabin manostat (8).
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