CN102553119B - Device for testing concentration of gas extinguishing agent and testing method thereof - Google Patents

Device for testing concentration of gas extinguishing agent and testing method thereof Download PDF

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Publication number
CN102553119B
CN102553119B CN201110436998.6A CN201110436998A CN102553119B CN 102553119 B CN102553119 B CN 102553119B CN 201110436998 A CN201110436998 A CN 201110436998A CN 102553119 B CN102553119 B CN 102553119B
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China
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gas
extinguishing agent
module
flow
concentration
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Expired - Fee Related
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CN201110436998.6A
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Chinese (zh)
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CN102553119A (en
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赵建华
陈迎春
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University of Science and Technology of China USTC
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University of Science and Technology of China USTC
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Abstract

The invention discloses a device for testing concentration of a gas extinguishing agent and a testing method of the device. The invention is characterized in that a gas filter, a heating and temperature control module, a flow control module, a concentration test module, a data processing module and a serial port communication module are assembled in a case body; a gas inlet is formed at the front end of the case body and a vacuum pump is connected to the rear end of the case body; the communication with a computer is achieved through a serial port; and the gas extinguishing agent concentration data is transferred to the computer after data processing. The gaseous mixture of air and gas extinguishing agent is pumped into the testing device through the vacuum pump, treated by the gas filter to remove foreign substances and heated to a preset temperature by a gas heater and then flows into the concentration test module; after the concentration data is obtained based on the thermal film sensing principle, the gaseous mixture is discharged through the outlet of the vacuum pump; the concentration data is processed by the data processing module to obtain concentration values of the gas extinguishing agent; and the concentration curve of the gas extinguishing agent is recorded by the computer. The device and method can be widely applied to test concentrations of different types of gas extinguishing agents and provide a support for evaluating fire extinguishment performance of gas extinguishing systems.

Description

A kind of gas extinguishing agent concentration determination device and method of testing thereof
Technical field
The invention belongs to aircraft fire protection technical field, particularly relate to gas extinguishing agent concentration determination device and the method for testing thereof in aircraft fire protection field.
Background technology
Very high to the test request of agent concentration in aircraft fire protection field, external still adopt at present the seventies traditional differential pressure measurement Fa,Er China aspect the testing arrangement of aircraft extinction using gas agent concentration and method still in blank.Traditional differential pressure measurement method, utilize vavuum pump that the mixture of air extinguishing chemical is drawn in agent concentration testing arrangement, the mixture of air extinguishing chemical produces certain pressure reduction by cellular current limliting plug, adopt differential pressure pick-up to measure pressure reduction, and adopt oscillograph recording pressure difference data, calculate agent concentration data.There is following defect in traditional differential pressure measurement method:
Although 1. device is fairly simple, inconvenient operation;
2. cellular current limliting plug easily stops up;
3. adopt oscillograph to carry out reading, and calculate just and can obtain agent concentration data, lack computer data and process means.
Summary of the invention
The object of the invention is to: the predicament facing in aircraft gas extinguishing agent concentration determination field for overcoming China, the invention provides a kind of gas extinguishing agent concentration determination device and method of testing thereof, it is easy and simple to handle, and flow-control is accurate, and is directly outputed test result by computer.
The technical scheme that the present invention adopts is in order to achieve the above object: a kind of gas extinguishing agent concentration determination device, this device comprises: air inlet, pneumatic filter, heated for controlling temperature module, gas extinguishing agent concentration determination module, flow controller, data processing module, serial communication module, computer and vavuum pump, by being placed on a pneumatic filter in cabinet, heated for controlling temperature module, gas extinguishing agent concentration determination module, flow controller, data processing module and serial communication module form interconnective integral body, by serial ports, be connected with computer, and at cabinet rear end connection vavuum pump, after the impurity that the mist of air extinguishing chemical to be measured filters out existence through pneumatic filter, enter gas-heated chamber, by the heating-up temperature heating of setting, to guarantee that gas extinguishing agent fully gasifies and evenly mixes with air, the mist total flow flowing through in flow controller control system, and flow value is transferred to computer, what by gas extinguishing agent concentration determination module, detected is converted to gas extinguishing agent concentration value with the concentration dependent signal of gas extinguishing agent via data processing module, through serial communication module, be transferred to computer, and be recorded as concentration determination curve, mist is discharged test macro through vavuum pump, in gas extinguishing agent concentration determination module, add throttle orifice and bypass line, hotting mask sensing module is placed in bypass line, only allows micro-gas flow through the temperature-sensing diaphragm surface of hotting mask sensing module, and computer is by the heating-up temperature of heated for controlling temperature module display unit inside, wherein:
The mechanical part of device links together by gas piping, the flow process of gas is followed successively by: by air inlet, entered, through pneumatic filter, filter, at gas-heated heating indoor, after throttle orifice throttling, a part of tested gas enters bypass line, and tested gas detects after agent concentration information in by-pass line, again with main line on gas converge, through flow-control module and vavuum pump, discharge system;
The circuit part of device should meet respectively: power supply meets the instructions for use at each position, guarantee that the mist of inflow measurement pipeline reaches the temperature of testing requirement, extinction using gas agent concentration is detected and exports test signal, the total flow that makes to flow through device is constant on default numerical value, temperature information, concentration information and flow information are processed, realized the communication with computer.
A kind of gas extinguishing agent concentration determination method, the method filters out impurity by air to be measured and extinction using gas agent composition by pneumatic filter, heated for controlling temperature module by gas-heated to be measured to steady temperature, by the flow of the tested gas of flow-control module constant control, by gas extinguishing agent concentration determination module, obtain gas concentration information output digit signals, by serial communication module, signal is transferred to computer, computer is processed data signal by the data processing method of setting, and finally exports concentration determination result, gas extinguishing agent concentration determination principle is hotting mask sensing principle, it by adding throttle orifice in main line, force constant trace gas to flow to into bypass line, while flowing through the temperature-sensing diaphragm surface of installing in bypass line, between air-flow and temperature-sensing diaphragm, there is exchange heat, cause temperature-sensing diaphragm resistance change, in circuit, the corresponding signal of telecommunication also changes thereupon, export the signal of telecommunication of this variation, can obtain and the concentration dependent information of gas extinguishing agent, because this information is only relevant with the concentration of gas extinguishing agent with the flow of tested gas, in device under the constant condition of air flow rate, only relevant to the concentration of gas extinguishing agent, its physical principle is: the heat Q of exchange is relevant with specific heat capacity C and the mass M of gas, and M is when immobilize, the mist definite to kind, and specific heat capacity is determined by the concentration of mist, therefore the concentration information that the information obtaining is gas extinguishing agent.
The present invention's advantage is compared with prior art:
1, the calculation procedure that the present invention processes gas extinguishing agent concentration determination data, be built in data processing module, during test, the automatic read test data of testing arrangement, through program, automatically process, just can externally export the test result of extinction using gas agent concentration, and record on computers its curve.
2, the present invention guarantees that by pneumatic filter the tested mist that flows into testing arrangement is not containing impurity such as dust; Utilize heated for controlling temperature module to heat mist to be measured, it is mixed, guarantee the accuracy of test; By control system flow, make gas concentration test become possibility; Adopt hotting mask sensing principle test gas agent concentration, test quick and precisely; Use computer export test result, result is easily understood.
3, the present invention can be widely used in the test of all kinds of extinction using gas agent concentrations, it is applied and will promote the production of gas extinguishing agent concentration determination equipment, for verifying that the fire extinguishing effectiveness of gas extinguishing system provides the development of means of testing ,Wei China aircraft fire protection technology that technical support is provided.
Accompanying drawing explanation
Fig. 1 is this gas extinguishing agent concentration determination apparatus structure schematic diagram.
Fig. 2 is heated for controlling temperature and concentration determination modular structure schematic diagram.
Fig. 3 is circuit system theory diagram.
Fig. 4 is flow chart of data processing figure.
In figure: 1. air inlet, 2. pneumatic filter, 3. heated for controlling temperature module, 4. gas extinguishing agent concentration determination module, 5. flow controller, 6. data processing module, 7. serial communication module, 8. computer, 9. vavuum pump, 10. gas-heated chamber, 11. hygrosensors, 12. heaters, 13. temperature-adjusting circuits, 14. throttle orifices, 15. bypass lines, 16. hotting mask sensing modules.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment explanation the present invention.
The overall structure of device as shown in Figure 1, device comprises: air inlet 1, pneumatic filter 2, heated for controlling temperature module 3, gas extinguishing agent concentration determination module 4, flow controller 5, data processing module 6, serial communication module 7, computer 8 and vavuum pump 9, mechanical part links together by gas piping, and circuit design is powered and realizes information transmission for each electric position.Pneumatic filter 2, heated for controlling temperature module 3, gas extinguishing agent concentration determination module 4, flow controller 5, data processing module 6, serial communication module 7 are assembled in a cabinet, by pipeline, in rear end, connect vavuum pump 9, at serial communication module, 7 places arrange computer interface.The heat request that adds by heated for controlling temperature module 3 implement devices, completes concentration determination by gas extinguishing agent concentration determination module 4, and flow controller 5 is realized flow-control requirement, and data processing module 6 and serial communication module 7 are realized the communication with computer 8; Data are through preset data processing method, and the signal of telecommunication by 4 outputs of gas extinguishing agent concentration determination module, is converted to gas extinguishing agent concentration value and exports as test result.
The test module that in the present embodiment, gas extinguishing agent concentration determination module 4 adopts based on hotting mask sensing principle, the concrete structure of heated for controlling temperature module 3 and gas agent concentration test module 4 as shown in Figure 2.Heated for controlling temperature module 3 comprises gas-heated chamber 10, hygrosensor 11, heater 12 and temperature-adjusting circuit 13; By hygrosensor 11, detected the mist temperature that will enter concentration determination module 4, the temperature signal that temperature signal detects according to hygrosensor 11 through data processing module 6, judges and controls temperature-adjusting circuit 13 and whether heater 12 moves.Gas extinguishing agent concentration determination module 4 is comprised of throttle orifice 14, bypass line 15 and hotting mask sensing module 16; Effect due to throttle orifice 14, make minipool gas automatically flow into bypass line 15, hotting mask sensing module 16 obtains gas extinguishing agent concentration information, and it is transferred to data processing module 6, by serial communication module 7, be connected with computer 8 again, process and output test result.
As shown in Figure 3, power supply output is supplying temperature detector, temperature control circuit, heater, flow controller and the required burning voltage of hotting mask sensing module respectively for the schematic block circuit diagram of device; Hygrosensor detects gas temperature signal and converts data signal to and export to data processing module, and judging whether need to be to gas-heated, and instruction is sent to heater; The external output flow data signal of flow controller arrives data processing module, and by data processing module, is controlled the aperture of flow controller; The signal that hotting mask sensing module detects is converted to data signal, export to data processing module, data processing module all reaches setting numerical value (80 ℃ of temperature in judgement temperature and flow, flow 2L/min) under prerequisite, process this signal, and export to computer, computer recording gas extinguishing agent concentration determination curve.
Flow chart of data processing as shown in Figure 4, data processing module (MCU) will be realized four functions, first, the flow signal of reading flow amount controller 5 outputs, and judge that whether flow is the 2L/min arranging, and if not 2L/min, the aperture of flow automatic regulation controller, if 2L/min proceeds temperature judgement; Second, read the temperature information that hygrosensor 11 detects, judge the relation between 80 ℃ of itself and design temperatures, if temperature lower than 80 ℃, drives heater action until the temperature detecting reaches 80 ℃, if temperature reaches 80 ℃, carry out the 3rd function; The 3rd, the signal of telecommunication of hotting mask sensing module output is processed, calculate extinction using gas agent concentration; The 4th, output test result to computer.Computer, by the signal reading, by preset program, is recorded as gas extinguishing agent concentration determination curve.
During testing arrangement work, gas extinguishing agent to Known Species, start vavuum pump 9 by setting flow by the mist suction apparatus of itself and air, by the total gas flow rate flowing through in flow controller 5 setting devices, be 2L/min, mist first filters through pneumatic filter 2, by gas pipeline, enter gas-heated chamber 10, hygrosensor 11 is transferred to data processing module 6 by the temperature signal detecting, data processing module 6 is by 80 ℃ of the temperature controlled conditions pre-setting, mist in heating clamber is carried out to temperature control, in temperature and flow, all reach under the prerequisite imposing a condition, the signal that 4 tests of gas extinguishing agent concentration determination module are arrived, by data processing module 6, carry out data processing, obtain the concentration value of gas extinguishing agent to be determined, and this value is outputed to computer, the curve that shows gas extinguishing agent concentration changes with time in the user interface of computer.
The part that the present invention does not elaborate belongs to techniques well known.

Claims (2)

1. a gas extinguishing agent concentration determination device, this device comprises: air inlet (1), pneumatic filter (2), heated for controlling temperature module (3), gas extinguishing agent concentration determination module (4), flow controller (5), data processing module (6), serial communication module (7), computer (8) and vavuum pump (9), it is characterized in that: by being placed on a pneumatic filter (2) in cabinet, heated for controlling temperature module (3), gas extinguishing agent concentration determination module (4), flow controller (5), data processing module (6) and serial communication module (7) form interconnective integral body, by serial ports, be connected with computer (8), and at cabinet rear end connection vavuum pump (9), after the impurity that the mist of air extinguishing chemical to be measured filters out existence through pneumatic filter, enter gas-heated chamber (10), by the heating-up temperature heating of setting, to guarantee that gas extinguishing agent fully gasifies and evenly mixes with air, the mist total flow flowing through in flow controller (5) control system, and flow value is transferred to computer (8), what by gas extinguishing agent concentration determination module (4), detected is converted to gas extinguishing agent concentration value with the concentration dependent signal of gas extinguishing agent via data processing module (6), through serial communication module (7), be transferred to computer (8), and be recorded as concentration determination curve, mist is discharged test macro through vavuum pump (9), in gas extinguishing agent concentration determination module (4), add throttle orifice (14) and bypass line (15), testing element is placed in bypass line (15), only allow micro-gas flow element surface after tested, computer (8) is by the heating-up temperature of heated for controlling temperature module (3) display unit inside, wherein:
The mechanical part of device links together by gas piping, the flow process of gas is followed successively by: by air inlet (1), entered, through pneumatic filter (2), filter, heating in gas-heated chamber (10), after throttle orifice (14) throttling, a part of tested gas enters bypass line (15), and tested gas detects after agent concentration information in by-pass line, again with main line on gas converge, through flow controller (5) and vavuum pump (9) discharge system;
The circuit part of device should meet respectively: power supply meets the instructions for use at each position, the mist of guaranteeing to flow into bypass line (15) reaches the temperature of testing requirement, extinction using gas agent concentration is detected and exports test signal, the total flow that makes to flow through device is constant on default numerical value, temperature information, concentration information and flow information are processed, realized the communication with computer (8).
2. one kind is utilized the gas extinguishing agent concentration determination device described in claim 1 to carry out gas extinguishing agent concentration determination method, it is characterized in that: air to be measured and extinction using gas agent composition filter out impurity by pneumatic filter (2), heated for controlling temperature module (3) by gas-heated to be measured to steady temperature, by the flow of the tested gas of flow controller (5) constant control, by gas extinguishing agent concentration determination module (4), obtain gas concentration information output digit signals, by serial communication module (7), signal is transferred to computer (8), computer is processed data signal by the data processing method of setting, final output concentration determination result, the principle of gas extinguishing agent concentration determination is hotting mask sensing principle, it by adding throttle orifice (14) in main line, force constant trace gas to flow to into bypass line (15), while flowing through the hotting mask sensing module (16) of installing in bypass line, between temperature-sensing diaphragm in air-flow and hotting mask sensing module (16), there is exchange heat, cause temperature-sensing diaphragm resistance change, in circuit, the corresponding signal of telecommunication also changes thereupon, export the signal of telecommunication of this variation, can obtain and the concentration dependent information of gas extinguishing agent, because this information is only relevant with the concentration of gas extinguishing agent with the flow of tested gas, in device under the constant condition of air flow rate, only relevant to the concentration of gas extinguishing agent, its physical principle is: the heat Q of exchange is relevant with specific heat capacity C and the mass M of gas, and M is when immobilize, the mist definite to kind, and specific heat capacity is determined by the concentration of mist, therefore the concentration information that the information obtaining is gas extinguishing agent.
CN201110436998.6A 2011-12-22 2011-12-22 Device for testing concentration of gas extinguishing agent and testing method thereof Expired - Fee Related CN102553119B (en)

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CN103163046B (en) * 2013-03-06 2015-03-04 中国科学技术大学 Gaseous extinguishing agent concentration measure apparatus
CN103638620B (en) * 2013-12-04 2016-03-09 中国科学技术大学 The wet regulator performance testing equipment of aircraft fire suppression system filter
CN104897602A (en) * 2015-06-23 2015-09-09 中国航空工业集团公司西安飞机设计研究所 Extinguishant concentration measuring sensor signal demodulation circuit
CN109540747A (en) * 2018-11-12 2019-03-29 中国飞行试验研究院 A kind of aircraft power plant cabin agent concentration airborne measurement device
CN110844118A (en) * 2019-11-20 2020-02-28 中国民用航空总局第二研究所 Porous structure differential pressure test device and test method

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