CN109883918A - A kind of protective mask test macro and test method - Google Patents
A kind of protective mask test macro and test method Download PDFInfo
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- CN109883918A CN109883918A CN201910113688.7A CN201910113688A CN109883918A CN 109883918 A CN109883918 A CN 109883918A CN 201910113688 A CN201910113688 A CN 201910113688A CN 109883918 A CN109883918 A CN 109883918A
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Abstract
A kind of protective mask test macro and test method, belong to daily necessities protective performance the field of test technology.Test macro includes test chamber, the skull model being placed in test chamber, respiration simulator, aerosol generator and real time monitoring apparatus, setting laser particle counter I, laser particle counter II, temperature control device and temperature and humidity sensing device in the test chamber, gas chamber is set in the skull model, and the gas chamber is separately connected respiration simulator, laser particle counter II, oral environment gas sampler and nose environmental gas sampling pipe；The laser particle counter I is used to measure the particulate matter initial concentration in the test chamber；The laser particle counter II is used to measure the particle concentration after mask filtering；Temperature and humidity sensing device is used to measure the humidity and temperature in the test chamber；It is controlled by real time monitoring apparatus, tests the protective performance of mask to be measured.The present invention not only meets national standard, more can satisfy the diversified testing requirement of client.
Description
Technical field
The invention belongs to daily necessities protective performance the field of test technology, more particularly to a kind of environment in different temperature and humidity
In, protective mask test macro of the mask to the different diameter airborne particle filter effect in air.
Background technique
From 2014, haze weather is included in nature the condition of a disaster and is notified to by country, and wears mask for ordinary people
Most directly effective haze means when exactly going on a journey.In face of subsequent various dust-proof, the haze-proof mask matter occurred successively on the market
Irregular industry confusion is measured, country organizes to set up, issued " the daily protective mask technical specification of GB/T32610 ", bright
The really inspection specification of such protective mask, wherein just about " test method of particulate matter protection effect ".
This method generates the aerosol particle of a certain concentration and partial size by an aerosol generator, simulates particulate matter
(i.e. PM2.5) aerial suspended state, and passed through by mask using particulate matter detection means detecting with defined flow
The particle concentration situation of change of mask filtering front and back, evaluates protection of the mask to particulate matter with the percentage of concentration reduction levels
Effect.
Currently, having mature equipment on the market can satisfy the test request of this standard, but function is too single, mask
Practical service environment and standard requirements have differences: people walks about with mask, environment temperature locating for mask and humidity
It is not fixed and invariable, constant temperature and humidity is not met using practical；Similarly, the concentration of particulate matter is in different location also not phase
Together, aerosol generator particulate matter generates concentration and should can change in primary test；Temperature and humidity, the concentration of existing equipment are surveyed
Amount sample frequency is too low, and especially to make up above-mentioned two functional defect, lower sample frequency is unable to satisfy under dynamic change
Test need, this three problems are our product problems to be solved.
Summary of the invention
Current such particulate matter protection test instrument there are aiming at the problem that, the present invention provides a kind of protective mask test system
System, not only meets national standard, more can satisfy the diversified testing requirement of client.
The purpose of the present invention is achieved through the following technical solutions:
A kind of protective mask test macro of the present invention, including test chamber, the skull model being placed in test chamber, breathing mould
Quasi- device, aerosol generator and real time monitoring apparatus, the test chamber is interior to be arranged laser particle counter I, laser particle counter
Device II, temperature control device and temperature and humidity sensing device, the skull model is interior to be arranged gas chamber, and the gas chamber is separately connected breathing simulation
Device, laser particle counter II, oral environment gas sampler and nose environmental gas sampling pipe；The laser particle counter
I for measuring the particulate matter initial concentration in the test chamber；The laser particle counter II passes through mask mistake for measuring
Particle concentration after filter；Temperature and humidity sensing device is used to measure the humidity and temperature in the test chamber；
Real time monitoring apparatus is separately connected temperature and humidity sensing device, temperature control device, laser particle counter I, laser particle
Counter II, respiration simulator and aerosol generator simulate the breathing of people's normal life by real-time control respiration simulator
Frequency and inspiratory flow variation simulate the particulate matter suspended concentration in living environment by control colloidal sol generator, by warm and humid
The temperature and humidity in the test chamber of sensing device detection is spent, the starting and closing of temperature control device is controlled, tests the protection of mask to be measured
Performance.
Preferably, the temperature and humidity sensing device includes sensing rod for temperature I, sensing rod for temperature II, Cloth with wetness sensing function and the wet sink of sense, the sense
Wet stick I is parallel with sensing rod for temperature II to be placed on the test chamber side wall, and sensing rod for temperature II is located at the underface of sensing rod for temperature I, detection test
Cabin temperature feels the lower section that sensing rod for temperature II in the test chamber is arranged in wet sink, and the Cloth with wetness sensing function 5 is suspended on sensing rod for temperature II 4,
The bottom of Cloth with wetness sensing function 5 is placed in the wet sink 6 of sense, and sensing rod for temperature I and sensing rod for temperature II are separately connected real time monitoring apparatus and temperature and humidity control
Device processed is obtained by real time monitoring apparatus and shows actual temperature and humidity in the test chamber.
Preferably, the circulating fan for promoting air circulation flow in cabin, temperature in adjusting cabin are additionally provided in the test chamber
The uniformity of humidity.
Preferably, the laser particle counter I and laser particle counter II are arranged in the test chamber, laser
Corpuscular counter I detects the particulate matter initial concentration without mask filtering in the test chamber；Laser particle counter II detects
Particle concentration after being filtered by mask.
Preferably, the real time monitoring apparatus includes PLC and PC display, laser particle counter I, laser particle counter
The temperature-sensitive I and sensing rod for temperature II of device II and temperature and humidity sensing device are separately connected the signal input part of PLC, transmitting detection signal, PLC
It is separately connected heating device and refrigerating plant by temperature control modules, PLC flow-control module is separately connected respiration simulator
And aerosol generator, pass through the temperature of PC display display detection, hygrometer particle concentration.
Preferably, the temperature control device includes heating device, refrigerating plant and temperature and humidity controller, and the heating device is set
In in test chamber, temperature and humidity controller is separately connected the control switch of heating device and refrigerating plant, adjusts heating device and system
The watt level of device for cooling controls temperature and humidity up and down, stabilization by temperature and humidity controller.
Preferably, the refrigerating plant includes compressor and evaporator, and the outer board of test chamber is arranged in the compressor
Lower space, in test storehouse inner wall, low temperature refrigerant flows through evaporator for evaporator setting, and heat in test chamber 1 is taken away in evaporation, to
Cooling.
Preferably, the real time monitoring apparatus includes PLC, temperature control modules, humidity control module, flow-control module
With PC display, the sensing rod for temperature I3 and temperature-sensitive of laser particle counter I 8, laser particle counter II 9 and temperature and humidity sensing device
Stick II 4 is separately connected the signal input part of PLC, transmitting detection signal, and PLC output end is separately connected temperature control modules, humidity
Control module and flow-control module are separately connected heating device by temperature control modules and humidity control module and refrigeration fill
It sets, respiration simulator and aerosol generator is separately connected by flow-control module；Pass through the temperature of PC display display detection
Degree, hygrometer particle concentration.
The test method of protective mask test macro of the present invention, using the test method of setting control mode:
The setting value of input temp in PLC controller, humidity and ambient particle object concentration three, the current actual value of temperature is by sensing rod for temperature
I is directly measured, and after humidity measures temperature by sensing rod for temperature I and sensing rod for temperature II, is handled according to current actual temperature and the two temperature difference
It is calculated, the particle concentration in test chamber 1 is measured by laser particle counter I, is shown in temperature current on PC display
Degree, humidity, particle concentration actual value；Meanwhile it obtaining and switching temperature and humidity versus time curve.
The test method of protective mask test macro of the present invention, using the test method of formula control model, packet
Include following steps:
S1: the temperature and humidity and particle concentration atmosphere in test chamber 1 are built: presets the temperature of every section of program needs
Degree, humidity, particle concentration value, and successively execute, the PLC controller of real time monitoring apparatus passes through corresponding PID arithmetic, respectively
The preset value of temperature and humidity in test chamber, ambient particle object concentration is set；
S2: judging whether temperature reaches setting value, and thermal balance is completed in test chamber? when temperature is higher than preset value,
Temperature and humidity controller is through PID arithmetic, and to refrigerating plant output signal, refrigerating plant freezes, temperature decline in test chamber；Work as temperature
When lower than preset value, temperature and humidity controller exports heating signal to heating device, and heater heats, and temperature rises in test chamber；
Humidity, which is detected, by sensing rod for temperature I and sensing rod for temperature II reaches setting value? it is compared by temperature and humidity controller,
When humidity is lower than preset value, heating wire works in humidification sink, the water evaporation humidification in sink；When humidity is higher than preset value,
The evaporator refrigeration moisture absorption of refrigerating plant；
After humidity reaches preset value, the particle concentration that laser particle counter I, II senses feeds back to aerosol
Device, aerosol generator automatically control the throughput rate of itself, require the concentration that concentration meets setting in test chamber；
S3: under the temperature and humidity conditions of setting, PLC controller compares test chamber endoparticle object concentration and mask filtering automatically
Particle concentration value afterwards, and judge with this strainability of mask.
The invention has the benefit that
In terms of Temperature and Humidity Control of the present invention, temperature and humidity is adjustable in a very big range, and can realize can journey
Formula Discrete control；Aerosol generator generates granule density stepwise adjustable, this program can be acted on aforementioned temperature and humidity suite；
The Temperature Humidity Sensor and PM2.5 sensor of high sample frequency are selected, feedback faster, regulates and controls sensitiveer.
Detailed description of the invention
Fig. 1 is Temperature and Humidity Control partial schematic diagram of the invention.
Fig. 2 is particle concentration control section of the present invention schematic diagram.
Fig. 3 is real time monitoring apparatus schematic diagram of the present invention.
Fig. 4 is real time monitoring apparatus circuit diagram of the present invention.
Fig. 5 is temperature control device schematic diagram of the present invention.
Fig. 6 is test method schematic diagram of the invention.
In figure: 1. test chambers, 2. skull models, 3. sensing rod for temperature I, 4. sensing rod for temperature II, 5. Cloth with wetness sensing function, the 6. wet sinks of sense, 7.
Circulating fan, 8. laser particle counters I, 9. laser particle counters II, 10. respiration simulators, 11. gas chambers, 12. nose rings
Border gas sampler, 13. oral environment gas samplers, 14. respiration simulator pipes, 15. sucking gas samplers, 16. gas are molten
Glue generator, 17. compressors, 18. evaporators, 19. heater strips I, 20. heater strips II.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
Embodiment 1: mask protective test macro of the present invention is two-part organic by hardware configuration and software operation
Cooperation is to complete test purpose.Hardware components are as shown in Figure 1, a kind of protective mask test macro of the present invention, including test chamber
1, skull model 2, respiration simulator 10, aerosol generator 16 and the real time monitoring apparatus being placed in test chamber 1；
Wherein test chamber 1 is the fixed-site of the skull model 2, inside can build experimenter needs temperature and humidity with
And particle concentration atmosphere；
Laser particle counter I 8, laser particle counter II 9, heating device, refrigerating plant are set in the test chamber 1
And temperature and humidity sensing device, the skull model 2 is interior to be arranged gas chamber 11, and the gas chamber 11 is separately connected respiration simulator 10, swashs
Light particle counter II 9, oral environment gas sampler 13 and nose environmental gas sampling pipe 12；The laser particle counter
I 8 for measuring the particulate matter initial concentration in the test chamber；The laser particle counter II 9 passes through mask for measuring
Particle concentration after filtering；Temperature and humidity sensing device is used to measure the humidity and temperature in the test chamber；
Real time monitoring apparatus is separately connected temperature and humidity sensing device, heating device, refrigerating plant, laser particle counter I
8, laser particle counter II 9, respiration simulator 10 and aerosol generator 16 are simulated by real-time control respiration simulator 10
The respiratory rate and inspiratory flow of people's normal life change, and the particulate matter in living environment is simulated by control colloidal sol generator 16
Suspended concentration, the temperature and humidity in test chamber detected by temperature and humidity sensing device, control heating device and refrigerating plant open
Dynamic and closing, tests the protective performance of mask to be measured.
The temperature and humidity sensing device includes sensing rod for temperature I3, sensing rod for temperature II 4, Cloth with wetness sensing function 5 and the wet sink 6 of sense, and the sense is wet
On the stick I3 side wall for being placed in the test chamber 1 parallel with sensing rod for temperature II 4, vertical with bulkhead, sensing rod for temperature II 4 is located at sensing rod for temperature I3's
Underface detects the temperature in test chamber 1, feels the lower section that sensing rod for temperature II 4 in the test chamber 1 is arranged in wet sink 6, this example two
Person is suspended on sensing rod for temperature II 4 at a distance of about 5cm, the Cloth with wetness sensing function 5, and the bottom of Cloth with wetness sensing function 5 is placed in the wet sink 6 of sense, sensing rod for temperature I
It is separately connected real time monitoring apparatus with sensing rod for temperature II, sensing rod for temperature I3 and sensing rod for temperature II 4 are separately connected real time monitoring apparatus；Wherein:
Sensing rod for temperature I3 measures the current actual temperature in the test chamber 1, according to feel temperature difference that wet stick I3 and sensing rod for temperature II 4 measure and
Humidity is calculated in current actual temperature.
It is additionally provided with the circulating fan 7 for promoting air circulation flow in cabin in the test chamber 1, is driven by electric motor
It is rotated, and adjusts the uniformity of temperature and humidity in test chamber 1.
The laser particle counter I8 and laser particle counter II 9 are arranged in the test chamber 1, the laser
Corpuscular counter I8 detects the particulate matter initial concentration without mask filtering in the test chamber 1；For characterizing mask protection effect
Fruit；Particle concentration of the detection of laser particle counter II 9 after mask filtering；For characterizing mask filtering effect
Fruit.
As shown in Figure 3, Figure 4, the real time monitoring apparatus includes PLC, temperature control modules, humidity control module, flow
Control module and PC display, the sensing rod for temperature of laser particle counter I 8, laser particle counter II 9 and temperature and humidity sensing device
I3 and sensing rod for temperature II 4 are separately connected the signal input part of PLC, transmitting detection signal, and PLC output end is separately connected temperature control mould
Block, humidity control module and flow-control module are separately connected heating device by temperature control modules and humidity control module
And refrigerating plant, respiration simulator and aerosol generator are separately connected by flow-control module；It is shown by PC display
The temperature of detection, hygrometer particle concentration.
The PLC can also connect printer, print any point-in-time or the examining report of period.
As shown in figure 5, the temperature control device includes heating device, refrigerating plant and temperature and humidity controller, the heating dress
It is placed in test chamber and is arranged close to circulating fan 7, temperature and humidity controller is separately connected the control of heating device and refrigerating plant
Switch adjusts the unlatching and watt level of heating device and refrigerating plant.
The heating device is heater, and this example uses high-power heater strip I 19, the circulating fan in test chamber 1
Setting.
The refrigerating plant includes compressor 17 and evaporator 18, and the outer board lower part of test chamber is arranged in the compressor
Space, on test storehouse rear wall, low temperature refrigerant flows through evaporator for evaporator setting, and heat in test chamber 1 is taken away in evaporation, to
Cooling.
High hot-air is recycled in test chamber 1 to promote the temperature in test chamber 1, temperature controller control temperature and humidity rise,
Decline is stablized: wherein temperature controls: when actual temperature is higher than setting value, then temperature controller control refrigerating plant increases power, temperature
Decline；When actual temperature is lower than setting value, then temperature controller control heating device increases power, and temperature rises；Stabilization process is one
A dynamic equilibrium process, theoretically heating is consistent with the power of refrigeration to maintain；Humid control: when actual humidity is higher than
Setting value, then temperature controller control refrigerating plant increases power, and evaporator absorbs moisture, reduces the humidity value in test chamber 1；Work as reality
When border humidity is lower than setting value, (this example uses small heater strip II 20 to the heater being arranged outside test chamber, is placed under sink
Side) warming and humidifying sink, evaporates the steam in sink, plays humidifying effect.
The skull model 2 shares two, copies the adult and big little makings of children head respectively, for test adult and not
The mask that Adult Groups are worn.
Four gas passages that gas chamber 11 in the skull model 2 connects, wherein 12 mould of nose environmental gas sampling pipe
From nose when quasi- breathing；The simulation of oral environment gas sampler 13 uses mouth air-breathing；Head model corrugated hose 14 connects
Respiration simulator 10 is connect, the respiration simulator 10 can simulate the respiratory rate and inspiratory flow variation of people's normal life；It inhales
Enter gas sampler 15 and connects the laser particle counter II 9, particle concentration of the measurement after mask filtering；Gas is molten
Glue generator 16 can produce the oiliness or salt particulate matter of certain particle size range, and the circulating fan 7 is cooperated to simulate life cycle
Particulate matter suspension flow regime in border.
As shown in figure 4, protective mask test macro of the invention, the test method under formula control model, including
Following steps:
S1: presetting multistage temperature, humidity and granule density, while can set the retention time of every section of program, such as:
Program 1: 30 DEG C of temperature, humidity 60%RH, 10 μ g/m of concentration3, time 10min；
Program 2: temperature 50 C, humidity 60%RH, 14 μ g/m of concentration3, time 20min；
Program 3: temperature 50 C, humidity 50%RH, 20 μ g/m of concentration3, time 15min；
......
Free setting program section condition is needed according to test, nine Duan Chengxu can be set in highest；
When temperature is higher than preset value, the temperature control modules of PLC are through PID arithmetic, to refrigerating plant output signal, refrigeration
Device freezes, temperature decline in test chamber；When temperature is lower than preset value, PLC temperature control modules add heating device output
Thermal signal, heater heat, and temperature rises in test chamber；
S2: humidity is detected by sensing rod for temperature I and sensing rod for temperature II and reaches setting value? compared by temperature and humidity temperature controller
When being lower than preset value compared with, humidity, heating wire works in humidification sink, the water evaporation humidification in humidification sink；Humidity is higher than pre-
If when value, the evaporator refrigeration moisture absorption of refrigerating plant；
After humidity reaches preset value, the particle concentration that laser particle counter I, II senses feeds back to aerosol
Device, aerosol generator automatically control the throughput rate of itself, require the concentration that concentration meets setting in test chamber；
S3: under the temperature and humidity conditions of setting, PLC controller compares test chamber endoparticle object concentration and mask filtering automatically
Particle concentration value afterwards, and judge with this strainability of mask.
The present invention controls temperature and humidity up and down, stabilization, works as reality by heating system and refrigeration system organic coordination
Temperature is higher than setting value, then temperature controller controls refrigerating plant power increase, temperature decline；Actual temperature is lower than setting value, then warm
It controls device and controls heating device power increase, temperature rises；Stabilization process is a dynamic equilibrium process, theoretically heats and makes
Cold power can unanimously maintain；When actual humidity is higher than setting value, then temperature controller control refrigeration work consumption increases, and evaporator is inhaled
Hygroscopic gas reduces the humidity value in test chamber, and when humidity is lower than setting value, sink is evaporated in the small heater strip heating of humidification sink
Interior water evaporation, plays humidifying effect.
The present invention is in the test method under setting control mode: temperature and humidity and ring can be inputted in PLC controller interface
The current actual value of the setting value of border particle concentration three, temperature is directly measured by sensing rod for temperature I, and humidity is by sensing rod for temperature I and sense
After warm stick II measures temperature, it is calculated according to current actual temperature and the two temperature difference processing, the particulate matter in test chamber 1 is dense
Degree is measured by laser particle counter I, and is shown in temperature current on PC display, humidity, particle concentration actual value；
Meanwhile it is available and switch temperature and humidity with the change curve of time.
Formula control model test method of the invention, is to need to preset multistage temperature and humidity and granule density program,
And the retention time of every section of program, setting control mode is compared, at least one condition of every section of program is not identical, and the present invention presses
It is executed one by one according to the program of setting, which facilitates the mask filter effect under research varying environment；Its laser particle counter
Particle concentration after II filtering measured equally understands real-time display in main interface；The present invention may be selected to generate test report
It accuses, content includes necessary measured value, temperature and humidity curve, filter efficiency (%) etc., be may be selected especially in filter efficiency option
Sometime filter effect whole under point, certain a period of time even some program, this report can be saved with picture format,
Printer can also be directly connected to print.The formula control model, which compares setting control mode, can once set multiple groups item
Part, therefore the strainability of mask at different conditions can be studied, more saving testing time, inclined research use.
Claims (10)
1. a kind of protective mask test macro, including test chamber, the skull model being placed in test chamber, respiration simulator, gas
Colloidal sol generator and real time monitoring apparatus, it is characterised in that:
Setting laser particle counter I, laser particle counter II, temperature control device and temperature and humidity sensing dress in the test chamber
It sets, gas chamber is set in the skull model, the gas chamber is separately connected respiration simulator, laser particle counter II, oral area ring
Border gas sampler and nose environmental gas sampling pipe；The laser particle counter I is used to measure in the test chamber
Grain object initial concentration；The laser particle counter II is used to measure the particle concentration after mask filtering；Temperature and humidity
Sensing device is used to measure the humidity and temperature in the test chamber；
Real time monitoring apparatus is separately connected temperature and humidity sensing device, temperature control device, laser particle counter I, laser particle counter
Device II, respiration simulator and aerosol generator simulate the respiratory rate of people's normal life by real-time control respiration simulator
Change with inspiratory flow, the particulate matter suspended concentration in living environment is simulated by control colloidal sol generator, passes through temperature and humidity sense
The temperature and humidity in the test chamber of device detection is surveyed, the starting and closing of temperature control device is controlled, tests the protective performance of mask to be measured.
2. protective mask test macro according to claim 1, it is characterised in that: the temperature and humidity sensing device includes sense
Warm stick I, sensing rod for temperature II, Cloth with wetness sensing function and the wet sink of sense, the wet stick I of sense is parallel with sensing rod for temperature II to be placed in the test chamber side wall
On, sensing rod for temperature II is located at the underface of sensing rod for temperature I, detects test chamber temperature, feels wet sink and temperature-sensitive is arranged in the test chamber
The lower section of stick II, the Cloth with wetness sensing function 5 are suspended on sensing rod for temperature II 4, and the bottom of Cloth with wetness sensing function 5 is placed in the wet sink 6 of sense, sensing rod for temperature I
It is separately connected real time monitoring apparatus and temperature and humidity controller with sensing rod for temperature II, obtained by real time monitoring apparatus and shows the survey
Try the actual temperature and humidity in cabin.
3. protective mask test macro according to claim 1, it is characterised in that: be additionally provided with and promote in the test chamber
The circulating fan of air circulation flow in cabin, the uniformity of temperature and humidity in adjusting cabin.
4. protective mask test macro according to claim 1, it is characterised in that: the laser particle counter I and swash
Light particle counter II is arranged in the test chamber, and laser particle counter I is detected in the test chamber without mask mistake
The particulate matter initial concentration of filter；Particle concentration of the detection of laser particle counter II after mask filtering.
5. protective mask test macro according to claim 1, it is characterised in that: the real time monitoring apparatus includes PLC
With PC display, the temperature-sensitive I and sensing rod for temperature II of laser particle counter I, laser particle counter II and temperature and humidity sensing device
It is separately connected the signal input part of PLC, transmitting detection signal, PLC is separately connected heating device and system by temperature control modules
Device for cooling, PLC flow-control module are separately connected respiration simulator and aerosol generator, pass through the display detection of PC display
Temperature, hygrometer particle concentration.
6. protective mask test macro according to claim 1, it is characterised in that: the temperature control device includes heating dress
Set, refrigerating plant and temperature and humidity controller, the heating device are placed in test chamber, temperature and humidity controller be separately connected heating dress
The control switch with refrigerating plant is set, the watt level of heating device and refrigerating plant is adjusted, is controlled by temperature and humidity controller
Temperature and humidity up and down, stabilization.
7. protective mask test macro according to claim 1, it is characterised in that: the refrigerating plant include compressor and
The outer board lower space of test chamber is arranged in evaporator, the compressor, and evaporator setting is in test storehouse inner wall, low temperature refrigerant
Evaporator is flowed through, heat in test chamber 1 is taken away in evaporation, to cool down.
8. protective mask test macro according to claim 1, it is characterised in that: the real time monitoring apparatus include PLC,
Temperature control modules, humidity control module, flow-control module and PC display, laser particle counter I 8, laser particle meter
Number device II 9 and the sensing rod for temperature I3 and sensing rod for temperature II 4 of temperature and humidity sensing device are separately connected the signal input part of PLC, transmitting detection
Signal, PLC output end are separately connected temperature control modules, humidity control module and flow-control module, control mould by temperature
Block and humidity control module are separately connected heating device and refrigerating plant, are separately connected respiration simulator by flow-control module
And aerosol generator；Pass through the temperature of PC display display detection, hygrometer particle concentration.
9. the test method of protective mask test macro as described in claim 1, it is characterised in that: use setting control mode
Test method: in PLC controller input temp, humidity and ambient particle object concentration three setting value, temperature it is current
Actual value is directly measured by sensing rod for temperature I, after humidity measures temperature by sensing rod for temperature I and sensing rod for temperature II, according to current actual temperature
It is calculated with the processing of the two temperature difference, the particle concentration in test chamber 1 is measured by laser particle counter I, and it is aobvious to be shown in PC
Show temperature current on device, humidity, particle concentration actual value；Meanwhile it obtaining and switching temperature and humidity versus time curve.
10. the test method of protective mask test macro as described in claim 1, it is characterised in that: control mould using formula
The test method of formula, comprising the following steps:
S1: the temperature and humidity and particle concentration atmosphere in test chamber 1 are built: presets the temperature, wet of every section of program needs
Degree, particle concentration value, and successively execute, the PLC controller of real time monitoring apparatus passes through corresponding PID arithmetic, is respectively set
The preset value of temperature and humidity, ambient particle object concentration in test chamber；
S2: judging whether temperature reaches setting value, and thermal balance is completed in test chamber? it is warm and humid when temperature is higher than preset value
Controller is spent through PID arithmetic, and to refrigerating plant output signal, refrigerating plant freezes, temperature decline in test chamber；When temperature is lower than
When preset value, temperature and humidity controller exports heating signal to heating device, and heater heats, and temperature rises in test chamber；
Humidity, which is detected, by sensing rod for temperature I and sensing rod for temperature II reaches setting value? it is compared by temperature and humidity controller, humidity
When lower than preset value, heating wire works in humidification sink, the water evaporation humidification in sink；When humidity is higher than preset value, refrigeration
The evaporator refrigeration moisture absorption of device；
After humidity reaches preset value, the particle concentration that laser particle counter I, II senses feeds back to aerosol generator,
Aerosol generator automatically controls the throughput rate of itself, requires the concentration that concentration meets setting in test chamber；
S3: under the temperature and humidity conditions of setting, PLC controller compares test chamber endoparticle object concentration automatically and mask is filtered
Particle concentration value, and judge with this strainability of mask.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111272638A (en) * | 2020-03-29 | 2020-06-12 | 复旦大学 | Testing device and method for evaluating filtering efficiency of new coronavirus protective mask |
| CN112881257A (en) * | 2021-01-12 | 2021-06-01 | 尚志(北京)科技有限公司 | Mask design auxiliary test method adopting head die |
| CN113551848A (en) * | 2021-06-07 | 2021-10-26 | 中国船舶重工集团公司第七一八研究所 | Device and method for testing leakage amount of oxygen mask for airplane |
| CN113686757A (en) * | 2021-10-25 | 2021-11-23 | 南通朗迪机械科技有限公司 | Daily mask air permeability detection method and device |
| CN114002124A (en) * | 2021-11-01 | 2022-02-01 | 山东黄河三角洲纺织科技研究院有限公司 | Melt-blown fabric electrostatic attenuation processing device and test method |
| CN111272638B (en) * | 2020-03-29 | 2024-04-26 | 复旦大学 | Testing device and method for evaluating filtering efficiency of novel coronavirus protective mask |
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| CN113551848B (en) * | 2021-06-07 | 2022-12-02 | 中国船舶重工集团公司第七一八研究所 | Device and method for testing leakage amount of oxygen mask for airplane |
| CN113686757A (en) * | 2021-10-25 | 2021-11-23 | 南通朗迪机械科技有限公司 | Daily mask air permeability detection method and device |
| CN113686757B (en) * | 2021-10-25 | 2021-12-17 | 南通朗迪机械科技有限公司 | Daily mask air permeability detection method and device |
| CN114002124A (en) * | 2021-11-01 | 2022-02-01 | 山东黄河三角洲纺织科技研究院有限公司 | Melt-blown fabric electrostatic attenuation processing device and test method |
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