CN104730039B - Indoor visibility meter calibration system - Google Patents
Indoor visibility meter calibration system Download PDFInfo
- Publication number
- CN104730039B CN104730039B CN201510058255.8A CN201510058255A CN104730039B CN 104730039 B CN104730039 B CN 104730039B CN 201510058255 A CN201510058255 A CN 201510058255A CN 104730039 B CN104730039 B CN 104730039B
- Authority
- CN
- China
- Prior art keywords
- atmospheric environment
- environment simulation
- simulation cabin
- calibration system
- visibility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analysing Materials By Optical Means (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention relates to an indoor visibility meter calibration system.A gas aerosol generator positioned in an equipment room is arranged outside an atmospheric environment simulation cabin and is connected to the inside of the atmospheric environment simulation cabin through an underground pipeline, a gas supply circulating system positioned in a gas supply system mounting room is arranged at one end part of the atmospheric environment simulation cabin, a super clean room and a wind shower are arranged at the other end of the atmospheric environment simulation cabin, the calibration system is arranged in the atmospheric environment simulation cabin, an external display system and a control system are arranged in the super clean room, and one end of the atmospheric environment simulation cabin is provided with a gas inlet and the other end is provided with a gas inlet. The indoor visibility meter calibration system realizes approximate real simulation based on atmospheric environment, and tests the error of the tested visibility meter by measuring and comparing the transmittance of a plurality of points of equipment to be tested under different visibility conditions.
Description
Technical Field
The invention relates to a visibility detection device, in particular to an indoor visibility meter calibration system.
Background
Visibility is one of important meteorological factors for ensuring flight safety, and is an important basis for judging whether an airport is opened or closed, an airplane takes off or lands, and visual flight or instrument flight is adopted. The accurate measurement of visibility has important practical value and research significance.
At present, the large and medium airports in China almost all use the MITRAS atmospheric transmission instrument and the FD12P type forward scattering instrument which are produced by VaISALA corporation in Finland, the purchase price of the equipment is very expensive, and the maintenance, the maintenance and the upgrading cost of the later equipment are huge because the equipment does not have own intellectual property. Even so, the breadth of our country is broad, airports are numerous, the difference between the atmospheric environment and the atmospheric components is huge, different atmospheric components have huge influence on the extinction coefficient or the atmospheric transmittance, the difference of the extinction coefficient or the atmospheric transmittance directly influences the precision of the visibility measuring instrument, and the algorithm and software related to the extinction coefficient inversion visibility are mastered abroad, so that the accuracy and reliability difference of the current foreign instruments purchased by people at present are large, and great difficulty is brought to the practical business application of civil aviation.
The accuracy and the measurement error of the visibility meter are important indexes of the visibility measuring instrument, and the real visibility of the atmosphere is influenced by factors such as optical characteristics of a target, background characteristics of the target, the uniformity degree of the atmosphere, human visual physiology and the like. The visibility measuring instrument can be influenced by mirror surface pollution, photoelectric detector temperature drift, circuit parameter discreteness, light source stability, light source monochromaticity, system working time and device aging in different degrees in the using process, and the measuring accuracy and reliability can not meet the requirements of actual use. At present, visibility instrument manufacturers in various countries in the world adopt own relative reference standards to evaluate the precision of products respectively, and no uniform inspection standard exists. The civil aviation airport in China lacks laboratory calibration equipment for regularly calibrating and calibrating visibility measuring instruments.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an indoor visibility meter calibration system which can realize approximate real simulation based on atmospheric environment and test the error of a tested visibility meter by measuring and comparing the transmittance of a plurality of points of equipment to be tested under different visibility conditions.
The technical problem to be solved by the invention is realized by the following technical scheme:
an indoor visibility meter calibration system which is characterized in that: mainly by atmospheric environment simulation cabin, the equipment room, the aerosol takes place the system, air feed circulation system, air feed system installation room, ultra-clean room, the wind leaching rooms, calibration system, external display system, control system constitutes, the outside in atmospheric environment simulation cabin sets up the aerosol generator that is located the equipment room, aerosol generator is connected to inside the atmospheric environment simulation cabin through underground piping transportation, the air feed circulation system who is located the air feed system installation room in an end installation in atmospheric environment simulation cabin, set up ultra-clean room and wind leaching rooms at the other end in atmospheric environment simulation cabin, set up calibration system in atmospheric environment simulation cabin, install external display system in ultra-clean room, control system, atmospheric environment simulation cabin one end is provided with the air inlet, the other end is provided with the gas outlet.
The calibration system is a mobile variable baseline calibration system, and the mobile variable baseline calibration system is composed of a sliding track, a laser emission unit, a sliding platform, a platform driving mechanism, a receiving end mounting plate and a control box, wherein the laser emission unit and the sliding platform are installed on the sliding track, the receiving end mounting plate and the control box are installed on the sliding platform, the sliding platform is provided with the platform driving mechanism, a power box and a PLC control unit are installed in the control box, a photoelectric receiving probe of a visibility meter is installed on the receiving end mounting plate, the photoelectric receiving probe is connected to the PLC control unit through a signal transmission line, and the PLC control unit comprises a wireless communication module.
And the platform driving mechanism is composed of a servo motor, a transmission mechanism and a coupling, the servo motor is arranged on the upper surface of the sliding platform, an output shaft of the servo motor extends into the lower part of the sliding platform and controls the roller at the bottom of the sliding platform to move through the transmission mechanism and the coupling, and the servo motor is powered by a power box in the control box.
And the servo motor is connected with and installed with a rotary encoder, the rotary encoder is connected with the PLC control unit, a group of induction sheets are installed on the sliding track at intervals, and a sensor is installed on the sliding platform.
The atmospheric environment simulation cabin is a cabin body with a square cross section, the height of the cross section is 1-1.5m, the width is 1.5-2m, the length is 55-65m, the atmospheric environment simulation cabin is of a frame structure and comprises an installation frame and toughened glass, the installation frame comprises a stand column and a cross beam, and the side wall of the atmospheric environment simulation cabin is made of laminated toughened glass.
Moreover, a background brightness meter is arranged in the cabin body.
And a group of fans are installed in the cabin body.
The invention has the advantages and beneficial effects that:
1. the indoor visibility meter calibration system can simulate a real atmospheric environment, measure the transmittance in real time, measure the visibility corresponding to the transmittance, display the background brightness, be provided with a data interface, transmit the measured data to an external computer, display the data comparison between the calibration system and a to-be-measured meter, and transmit the measurement result obtained by the control system to an external display system interface for display.
2. The indoor visibility meter calibration system is a movable variable baseline calibration system, multipoint receiving light energy at a point which is not separated by 1m from 0m to 50m is measured by a fixed point method, the visibility value can be calculated, the device performs measurement calibration by averaging the lengths of the multipoint baselines, and the averaged sampling points are scattered according to the mathematical principle, so that the more accurate the calculated value is, and the accuracy of visibility measurement is improved.
3. The indoor visibility meter calibration system realizes approximate real simulation based on atmospheric environment, and tests the error of the tested visibility meter by measuring and comparing the transmittance of a plurality of points of equipment to be tested under different visibility conditions.
Drawings
FIG. 1 is a schematic structural view (perspective view) of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic cross-sectional view of FIG. 1;
FIG. 4 is a schematic structural diagram (perspective view) of the mobile variable baseline calibration system of the present invention;
FIG. 5 is a schematic structural diagram of the mobile variable baseline calibration system of the present invention;
FIG. 6 is a schematic structural view of a slide rail according to the present invention;
fig. 7 is a block diagram of the control system of the present invention.
Description of reference numerals:
1-an air supply system installation room, 2-an equipment room, 3-an atmospheric environment simulation cabin, 4-an air shower, 5-an ultra-clean room, 6-an air filtering device, 7-an air inlet, 8-an air mixing chamber, 9-an aerosol spray port, 10-a turbulent fan, 11 air outlets, 12 air filtering devices, 13-a sliding track, 14-a control box, 15-a photoelectric receiving probe, 16-a receiving end installation plate, 17-a sliding platform, 18-a first servo motor, 19-a horizontal moving seat, 20-a roller, 21-a coupler, 22-a second servo motor, 23-an induction sheet and 24-a sensor.
Detailed Description
The present invention will be further described by the following specific examples, which are only illustrative and not limitative, and the scope of the present invention is not limited thereby.
The utility model provides an indoor visibility meter calibration system, it is main by atmospheric environment simulation cabin 3, equipment room 2, the aerosol takes place the system, air supply circulation system, air supply system installation room 1, ultra-clean room 5, the wind leaching rooms 4, calibration system, the external display system, control system constitutes, outside in atmospheric environment simulation cabin sets up the aerosol generator that is located the equipment room, aerosol generator is connected to inside the atmospheric environment simulation cabin through underground piping transport, the air supply circulation system who is located the air supply system installation room is installed to a tip in atmospheric environment simulation cabin, set up ultra-clean room and wind leaching rooms at the other end in atmospheric environment simulation cabin, set up calibration system in the atmospheric environment simulation cabin, install the external display system in ultra-clean room, control system, atmospheric simulation environment cabin one end is provided with the air inlet, the other end is provided with the gas outlet. A smoke generating device can be arranged in the equipment room.
The atmospheric environment simulation cabin is a cabin body with a square cross section, the height of the cross section is 1-1.5m, the width is 1.5-2m, the length is 55-65m, the atmospheric environment simulation cabin is of a frame structure and comprises an installation frame and toughened glass, the installation frame comprises a stand column and a cross beam, and the side wall of the atmospheric environment simulation cabin is made of laminated toughened glass. The surface is coated with fluorocarbon (blue), the side wall is made of laminated toughened glass (the thickness is 6+6mm), the total area is 239.6m2, visible and near-infrared wave bands can be transmitted, the transmittance of the visible wave band is more than 90%, and the transmittance of the infrared wave band (780 nm-1000 nm) is more than 70%. The attachment is performed using a fixed fluke. A background luminance meter is arranged in the cabin body. A row of fans are arranged at the top in the cabin body.
Three openable access doors with the width of 0.8 meter are arranged in the atmospheric environment simulation cabin, are respectively positioned at the positions of 3m, 38.2m and 52.76m of the simulation cabin and are used for entering debugging equipment in the cabin body. The door frame and the door lock are made of aluminum alloy materials, the door body is made of laminated toughened glass (the thickness is 6+6mm), and the door has three functions of opening the door. The simulation cabin body has certain strength and can resist certain impact force, and damage caused by objects or strong wind or earthquake is prevented. Basic wind pressure: 0.50KN per square meter, basic snow pressure: 0.40 KN/square meter.
The air inlet 7 of the atmospheric environment simulation cabin is provided with a middle high efficiency air filtering device 6, and the air outlet 11 of the atmospheric environment simulation cabin is provided with a middle high efficiency air filtering device 12.
Air inlet pipelines of an air supply circulating system are arranged on two sides of a cabin body of the atmospheric environment simulation cabin at intervals, aerosol spray ports 9 are arranged on the ground below the interior of the cabin body and staggered with the air inlet pipelines on the two sides, aerosol spray ports are all provided with aerosol control valves, and the air inlet control valves are arranged on the air inlet pipelines. The aerosol flows into the middle part of the atmospheric environment simulation cabin, and the gas generated by the aerosol generating equipment is mixed by the gas mixing chamber 8 by using the air compressor device and then is input into the middle part of the atmospheric environment simulation cabin through the underground pipeline.
10 turbulent fans 10 are arranged in the simulation cabin for continuous blowing so as to ensure that aerosol in the air in the cabin is uniformly mixed as much as possible. The preparation time for uniformly mixing the air flow in the cabin is less than 30 minutes (the difference of readings is less than 5 mu g/m3 when the dust meter is used for three-point test before, in and after the simulation cabin). Working parameter 3m of air compressor equipment3And in min, the air inlet is provided with a rainproof shutter and a medium-high efficiency filter. The compressed gas three-dimensional nozzle is connected with a DN32 galvanized steel pipe by using a reducing bell mouth, and the working parameter of the nozzle device is 0.1m 3/min. The internal compressed air pipeline is coated with antirust paint by using a DN50 galvanized steel pipeline and a DN30 galvanized optical pipeline. All the air flow pipelines are controlled by electromagnetic valves, and can be opened and closed remotely, so that various circulating working modes can be realized conveniently.
On the premise of ensuring uniform mixing of aerosol in the cabin, the controllable range of the wind speed in the cabin is 0-5 m/s, and the wind speed of 5m/s is used for removing internal air and drying the cabin after water spraying and cleaning. The exhaust port is provided with a rainproof shutter, a high-efficiency filter and an electric adjusting air valve.
The side end of the atmosphere simulation cabin is tightly connected with a clean room 5. An external display system and a control system are installed in the ultra-clean room. The ultra-clean room adopts a fixed structure, and has the length of 6m, the width of 4m and the height of 3 m. The air shower is internally provided with an air shower chamber, and the air shower chamber is 1.4m long, 1m wide and 2.1m high. The purification efficiency is more than or equal to 0.3 μm of dust, the outlet air speed is more than or equal to 25m/s, the circulating air quantity is 2500m3/h, and N is 0.75 kw. An air conditioning system is arranged in the monitoring machine room.
The monitoring machine room is used for placing a control PLC, an industrial personal computer and a system state display of the whole system. The overall working state of the system can be monitored in the monitoring room. The arrangement and wiring arrangement of the devices in the monitoring machine room are shown in the drawings.
The equipment room is provided with a camera for monitoring the working state of the aerosol equipment; one atmosphere simulation cabin is arranged outside the cabin, the lens faces the cabin, and the cabin environment, the working state and the working environment are monitored.
The motion of the trolley is driven by a servo motor, the motor is controlled by a PLC, and the attenuation of the transmittance of 532nm laser per meter under the condition of 2km visibility is about 0.14 percent through calculation. The variation rate is in the order of thousandth, and if the measured distance is finer, a large measurement error is caused. Therefore, 1 meter interval measurement is preliminarily planned. The accurate positioning of the trolley position is realized by adopting a sensor and an induction sheet,
the calibration system is a movable variable baseline calibration system which is composed of a sliding track 13, a laser emission unit (omitted in the figure), a sliding platform 17, a platform driving mechanism, a receiving end mounting plate 16 and a control box 14, wherein the laser emission unit and the sliding platform are installed on the sliding track, the receiving end mounting plate and the control box are installed on the sliding platform, the power supply box and the PLC control unit are installed in the control box, a photoelectric receiving probe 15 of a visibility meter is installed on the receiving end mounting plate, and the photoelectric receiving probe is connected to the PLC control unit through a signal transmission line. The PLC control unit comprises a wireless communication module.
The platform driving mechanism is composed of a longitudinal first servo motor 18, a transmission mechanism and a coupler 21, the first servo motor is installed on the upper surface of the sliding platform, an output shaft of the first servo motor extends into the lower portion of the sliding platform and controls the roller 20 at the bottom of the sliding platform to move through the transmission mechanism and the coupler, and the first servo motor is powered by a power box in the control box. The first servo motor is connected with and installed with a rotary encoder, and the rotary encoder is connected with the PLC control unit to realize the moving accuracy along the direction of the sliding track. The receiving end mounting plate is mounted on the slide platform by a horizontal movement mount 19 which is driven by a horizontally mounted second servo motor 22 through a lead screw drive system to achieve horizontal fine adjustment. And a second servo motor which is horizontally arranged is connected with a rotary encoder which is connected with the PLC control unit. So as to realize the accurate adjustment of the horizontal position of the receiving end mounting plate.
The first servo motor is connected with a rotary encoder, the rotary encoder is connected with the PLC control unit, a group of induction sheets 23 are further installed on the sliding track at intervals, and a sensor 24 is installed on the sliding platform. The induction sheet is made of a permanent magnetic material, and the sensor is a proximity magnetic inductor.
The communication system is arranged on the trolley, so that stable and effective transmission of signals is guaranteed, and the transmission requirement of the measured data of the trolley can be met. The 50-meter travel path is long, and high-precision up-down, left-right invariance is required, so that communication on the trolley is realized in a wireless mode, and power of each device is realized in a battery mode. And in the aspect of wireless communication, a wireless network card is selected to be accessed into the fanless computer to realize the connection of the experimental data and the computer in the operating room. The method is characterized in that a small-sized fanless computer controls a phase-locked amplifier, a chopper, the motion control of a trolley, the wireless network connection and data transmission, the data processing, the operation of an application program and the like, a wireless network card adopts TP-LINK,
the whole system adopts a control mode with PLC as the main part and industrial PC as the auxiliary part.
The control system and the display thereof are placed in an ultra-clean room, and the control system can complete the following functions:
the aerosol generation mixing and discharge are controlled, and the aerosol discharge type, discharge amount and discharge speed can be accurately controlled. The control trolley can move freely on the slide rail, and the moving distance can be accurately controlled.
And controlling a cleaning drainage system to clean the system.
The display of the control software includes:
visibility and RVR of the instrument to be tested, and transmittance given by the manufacturer of the instrument to be tested.
The calibration system measures visibility and RVR, and calibrates the transmittance of the measurement point of the system.
Comparing RVR, visibility and transmittance errors of the instrument to be measured and the calibration system, and integrating measurement curves of various visibility.
The type of the injected aerosol, the amount and the injection speed of the injected aerosol and the uniformity of the injected aerosol in the current cabin body.
The transmittance can be measured in real time, the visibility corresponding to the transmittance can be measured, the background brightness is displayed, and meanwhile, the data interface is equipped, so that the measured data can be transmitted to an external computer. And the data comparison between the calibration system and the instrument to be tested can be displayed. The measurement results obtained by the control system can be transmitted to an external display system interface for displaying.
The working principle and the method of the indoor visibility meter calibration system are as follows:
1. consistency calibration
The method includes the steps that three calibration instruments are arranged in a cabin body and are respectively marked as an instrument to be tested 1, an instrument to be tested 2 and an instrument to be tested 3, and aerosol is injected into the cabin body. Due to the low visibility condition with the calibrated visibility below 1000m, the visibility is divided into 6 parts: 0 m-100 m, 100 m-250 m, 250 m-400 m, 400 m-650 m, 650 m-800 m,800 m-1000 m;
⑵ opening the instrument 1 to be tested, stopping injecting gas when the visibility of the instrument 1 to be tested is 800-1000 m, and measuring the visibility display value of the instrument 1 to be tested at the moment as V1；
⑶ turning off the instrument 1 to be tested, turning on the instrument 2 to be tested, and measuring the visibility display value of the instrument 2 to be tested at the moment as V2；
⑷ turning off the instrument 2 to be tested, turning on the instrument 3 to be tested, and measuring the visibility display value of the instrument 3 to be tested at the moment as V3；
Fifthly, according to the consistency measurement formula, obtaining:
ΔV1＝V1-Vm(2)
ΔV2＝V2-Vm(3)
ΔV3＝V3-Vm(4)
following the requirements of civil aviation organization for visibility errors, Δ V1′,ΔV2′,ΔV3' need less than 10%.
2. Accuracy calibration
The first scheme is as follows:
the method includes the steps of placing a calibrated instrument in a cabin body, and injecting aerosol into the cabin body. Due to the low visibility condition with the calibrated visibility below 1000m, the visibility is divided into 6 parts: 0 m-100 m, 100 m-250 m, 250 m-400 m, 400 m-650 m, 650 m-800 m,800 m-1000 m.
Secondly, when the visibility of the instrument to be calibrated shows 800-1000 m, the injection of gas is stopped, and the MOR value measured by the visibility instrument to be calibrated by the instrument manufacturer reversely deduces the optical transmittance T at 24m, 26m, 29m, 32m, 35m, 39m, 43m, 48m and 53m (see Table 1). The MOR values measured were normalized to the 1min average.
Thirdly, an instrument to be measured is closed, the 532nmLD light source emitter is used as an emission source, the optical transmittance T' at the positions of 24m, 26m, 29m, 32m, 35m, 39m, 43m, 48m and 53m is measured by an accurate light intensity measuring device through a slidable track, the inverted value of an instrument manufacturer is compared with the measured value of an experiment according to the standard specified by the experiment platform, and all the points are required to meet the formula
Wherein T' represents the transmittance value of accurate calibration, and T represents the transmittance reversely deduced by the instrument to be measured.
Fourthly, injecting gas into the cabin until the concentration is 650-800 m, repeating the process of 1-3, and so on to obtain the comparison results of the visibility of the to-be-measured instrument and the calibration device in a plurality of atmospheric visibility (0-100 m, 100-250 m, 250-400 m, 400-650 m, 650-800 m, 800-1000 m), as shown in table 2.
TABLE 1 transmittance results table for the device under test
| 24m | 26m | 29m | 32m | 35m | 39m | 43m | 48m | 53m | |
| 0m～100m | |||||||||
| 100m～250m | |||||||||
| 250m～400m | |||||||||
| 400m～650m | |||||||||
| 650m～800m | |||||||||
| 800m～1000m |
T in the table 1 has 54 points, which correspond to 54 points of T', and when all the T satisfy the formula 8, the visibility meter meets the requirement of the calibration test.
Scheme II: visibility calibration of sliding track of atmosphere simulation cabin
The method includes the steps of placing a calibrated instrument in a cabin body, and injecting aerosol into the cabin body. Due to the low visibility condition with the calibrated visibility below 1000m, the visibility is divided into 6 parts: 0 m-100 m, 100 m-250 m, 250 m-400 m, 400 m-650 m, 650 m-800 m,800 m-1000 m.
⑵ when the visibility of the instrument to be calibrated is 800-1000 m, reading the visibility value V' of the instrument to be calibrated, using 532nmLD light source emitter as emission source, and measuring the distance L with an accurate light intensity measuring device via a slidable track1,L2,…,Li,…,LN(wherein L1≤L2≤…≤LN) Optical transmittance T of1,T2,…,Ti,…,TNCalculating the extinction coefficient sigma from the transmittancei：
Carrying out weighted average on a plurality of extinction coefficients to calculate the most accurate extinction coefficient
Finally, calculating the visibility value of the calibration system:
thirdly, injecting gas into the cabin body until the concentration is 650-800 m, repeating the process of 1-2, and so on to obtain the comparison result of the visibility of a plurality of instruments to be measured with atmospheric visibility (0-100 m, 100-250 m, 250-400 m, 400-650 m, 650-800 m, 800-1000 m) and the visibility of the calibration device, as shown in table 2.
TABLE 2 visibility comparison table for instrument to be measured and calibration device
| 0m～100m | 100m～250m | 250m～400m | 400m～650m | |
| To-be-tested instrumentDevice for cleaning the skin | ||||
| Calibration system | ||||
| 650m～800m | 800m～1000m | |||
| Instrument to be tested | ||||
| Calibration system |
It is required that the error must be less than 10% under each condition.
The third scheme is as follows:
the method includes the steps of placing a calibrated instrument in a cabin body, and injecting aerosol into the cabin body. Due to the low visibility condition with the calibrated visibility below 1000m, the visibility is divided into 6 parts: 0 m-100 m, 100 m-250 m, 250 m-400 m, 400 m-650 m, 650 m-800 m,800 m-1000 m.
⑵ when the visibility of the instrument to be calibrated is 800-1000 m, reading the visibility value V' of the instrument to be calibrated, using 532nmLD light source emitter as emission source, and measuring the distance L with an accurate light intensity measuring device via a slidable track1,L2,…,Li,…,LN(wherein L1≤L2≤…≤LN) Optical transmittance T of1,T2,…,Ti,…,TNCalculating the extinction coefficient sigma from the transmittancei：
Then N visibility values are calculated:
calculating N relative error values of a plurality of visibility of the instrument to be measured and the calibration system under the visibility:
thirdly, injecting gas into the cabin body until the concentration is 650-800 m, repeating the process of 1-2, and so on to obtain the comparison result of the visibility of the to-be-measured instrument and the calibration device in a plurality of atmospheric visibility (0-100 m, 100-250 m, 250-400 m, 400-650 m, 650-800 m, 800-1000 m), as shown in table 3.
TABLE 3 visibility comparison table for instrument to be measured and calibration device
In table 3, 60% (calculated from an atmospheric air projector 30m baseline) of values less than 10% are required for each row.
And the scheme is as follows: fixed point projector calibration
And a fixed projection rate calibration device is arranged beside the sliding track to calculate the visibility value.
The method includes the steps of placing a calibrated instrument in a cabin body, and injecting aerosol into the cabin body. Due to the low visibility condition with the calibrated visibility below 1000m, the visibility is divided into 6 parts: 0 m-100 m, 100 m-250 m, 250 m-400 m, 400 m-650 m, 650 m-800 m,800 m-1000 m.
Secondly, when the visibility of the instrument to be calibrated is 800-1000 m, reading the visibility value V' of the instrument to be calibrated, using a 532nmLD light source emitter as an emission source, measuring the transmittance T of the fixed point calibration system of 30m, directly calculating the visibility V of the calibration system through the transmittance, and calculating the error delta representing the calibration visibility instrument and the calibration system.
Thirdly, injecting gas into the cabin body until the concentration is 650-800 m, repeating the process of 1-2, and so on to obtain the comparison results of the visibility of a plurality of instruments to be measured with atmospheric visibility (0-100 m, 100-250 m, 250-400 m, 400-650 m, 650-800 m, 800-1000 m) and the visibility of the calibration device, as shown in table 4.
Table 4 visibility comparison table for instrument to be measured and calibration device
| Level of visibility | Δ |
| 0m～100m | |
| 100m～250m | |
| 250m～400m | |
| 400m～650m | |
| 650m～800 | |
| 800m～1000m |
It is desirable that each Δ be less than 10%.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (7)
1. An indoor visibility meter calibration system which is characterized in that: the device comprises an atmospheric environment simulation cabin, an equipment room, an aerosol generating system, an air supply circulating system, an air supply system installation room, an ultra-clean room, a calibration system, an external display system and a control system, wherein the aerosol generator positioned in the equipment room is arranged outside the atmospheric environment simulation cabin, the aerosol generator is connected to the inside of the atmospheric environment simulation cabin through an underground pipeline in a conveying way, the air supply circulating system positioned in the air supply system installation room is installed at one end part of the atmospheric environment simulation cabin, the ultra-clean room is arranged at the other end of the atmospheric environment simulation cabin, the calibration system is arranged in the atmospheric environment simulation cabin, the external display system and the control system are installed in the ultra-clean room, one end of the atmospheric environment simulation cabin is provided with an air inlet, and the other;
the calibration system is a movable variable baseline calibration system which comprises a sliding track, a laser emission unit, a sliding platform, a platform driving mechanism, a receiving end mounting plate and a control box, wherein the laser emission unit and the sliding platform are installed on the sliding track, the receiving end mounting plate and the control box are installed on the sliding platform, the sliding platform is provided with the platform driving mechanism, a power box and a PLC control unit are installed in the control box, a photoelectric receiving probe of a visibility meter is installed on the receiving end mounting plate, the photoelectric receiving probe is connected to the PLC control unit through a signal transmission line, and the PLC control unit comprises a wireless communication module.
2. The indoor visibility meter calibration system according to claim 1, characterized in that: 2-4 air showers are arranged at intervals in the atmospheric environment simulation cabin, and an air shower is arranged in the ultra-clean room.
3. The indoor visibility meter calibration system according to claim 1, characterized in that: the platform driving mechanism is composed of a first servo motor, a transmission mechanism and a coupler, the first servo motor is installed on the upper surface of the sliding platform, an output shaft of the first servo motor extends into the lower portion of the sliding platform and controls the roller at the bottom of the sliding platform to move through the transmission mechanism and the coupler, and the first servo motor is powered by a power box in the control box.
4. The indoor visibility meter calibration system according to claim 3, characterized in that: the first servo motor is connected with and provided with a rotary encoder, the rotary encoder is connected with the PLC control unit, a group of induction sheets are further installed on the sliding track at intervals, and a sensor is installed on the sliding platform.
5. The indoor visibility meter calibration system according to claim 1, characterized in that: the atmospheric environment simulation cabin is a cabin body with a square cross section, the height of the cross section is 1-1.5m, the width is 1.5-2m, the length is 55-65m, the atmospheric environment simulation cabin is of a frame structure and comprises an installation frame and toughened glass, the installation frame comprises a stand column and a cross beam, and the side wall of the atmospheric environment simulation cabin is made of laminated toughened glass.
6. The indoor visibility meter calibration system according to claim 5, wherein: a background luminance meter is arranged in the cabin body.
7. The indoor visibility meter calibration system according to claim 5, wherein: a group of fans are installed in the cabin body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510058255.8A CN104730039B (en) | 2015-02-05 | 2015-02-05 | Indoor visibility meter calibration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510058255.8A CN104730039B (en) | 2015-02-05 | 2015-02-05 | Indoor visibility meter calibration system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104730039A CN104730039A (en) | 2015-06-24 |
| CN104730039B true CN104730039B (en) | 2020-09-11 |
Family
ID=53454135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510058255.8A Active CN104730039B (en) | 2015-02-05 | 2015-02-05 | Indoor visibility meter calibration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104730039B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110888386B (en) * | 2019-11-07 | 2022-11-25 | 中国船舶重工集团公司第七一九研究所 | Large-traffic aerosol sample control system based on PLC |
| CN113588505A (en) * | 2021-07-27 | 2021-11-02 | 中国气象局上海物资管理处 | Shelter system and method combined with visibility environment simulation test |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0693032B2 (en) * | 1989-05-10 | 1994-11-16 | 三菱電機株式会社 | Visibility meter calibration device |
| CN101972724B (en) * | 2010-09-19 | 2013-03-13 | 交通运输部公路科学研究所 | Weather laboratory fog simulation system |
| CN104198443B (en) * | 2014-09-02 | 2016-08-24 | 四川鼎林信息技术有限公司 | The visibility Calibration System Calibration Method to product machine |
| CN104301717B (en) * | 2014-10-23 | 2017-04-26 | 广州市光机电技术研究院 | System for testing anti-fog function of video device |
| CN104777527B (en) * | 2015-04-20 | 2018-09-28 | 深圳大舜激光技术有限公司 | A kind of visibility caliberating device |
-
2015
- 2015-02-05 CN CN201510058255.8A patent/CN104730039B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104730039A (en) | 2015-06-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ohba et al. | Study on airflow characteristics inside and outside a cross-ventilation model, and ventilation flow rates using wind tunnel experiments | |
| CN104198344A (en) | Airflow-fog drop-dust three-phase medium coupling sedimentation experimental device and method | |
| CN104713852A (en) | Controllable visibility atmosphere simulation system | |
| ITFI20100208A1 (en) | METHOD FOR QUANTIFYING A FLOW OF GAS FUGITIVE BY MEANS OF VERTICAL CONCENTRATION MEASUREMENTS | |
| CN104730039B (en) | Indoor visibility meter calibration system | |
| CN104132903B (en) | A kind of soil moisture content measuring system and use its measuring method | |
| CN204405287U (en) | A kind of opening single flow icing tunnel of economical and efficient | |
| CN105242185A (en) | 66kV manual icing snow climate test apparatus | |
| Su et al. | Experimental investigation of turbulent fluctuation characteristics observed at a moving point under crossflows | |
| CN204142609U (en) | The experimental provision of distinguished and admirable-droplet-dust three-phase medium coupling settlement | |
| CN104500124A (en) | City tunnel ventilation test device and manufacturing method thereof | |
| Tai et al. | Visibility measurement in an atmospheric environment simulation chamber | |
| CN104713854B (en) | Movable visibility calibration system and calibration method | |
| CN108001709A (en) | A kind of aircraft secondary power systems air inlet measuring device | |
| CN109164023B (en) | Industrial tail gas particulate matter concentration on-line monitoring device | |
| CN209543728U (en) | Weather simulation laboratory with air control structure | |
| CN116842872A (en) | Numerical simulation evaluation method for pedestrian height wind environment around large-span roof | |
| CN201926546U (en) | On-site verification device for SF6-O2 leakage monitoring and warning device | |
| CN113551787B (en) | Simulation device for evaluating influence of atmosphere on active remote sensing detection mode | |
| WO2023004933A1 (en) | All-weather road surface reflection characteristic detection apparatus and method | |
| CN106018257B (en) | A kind of soil drifting erodable test method | |
| CN104713853B (en) | Variable-strength movable visibility calibration system and calibration method | |
| CN213041472U (en) | Device for generating large-scale high-speed wind tunnel PIV tracer particles and remotely controlling flow | |
| CN105784315B (en) | The variable wind erosion in-situ measurement device of fluidised form | |
| Roberts et al. | Wind-tunnel studies of roughness effects in gas dispersion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Meng Inventor after: Jiang Lihui Inventor after: Tai Hongda Inventor after: Xiong Xinglong Inventor before: Jiang Lihui Inventor before: Li Meng Inventor before: Tai Hongda Inventor before: Xiong Xinglong |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |