A calibration device and an atmospheric black carbon monitoring device having the same

Abstract

This invention discloses a calibration device and an atmospheric black carbon monitoring device incorporating the device, relating to the technical field of black carbon monitoring equipment. It includes a calibration disk and a drive structure for moving the calibration disk. The calibration disk has at least two calibration through-holes, and calibration plates are installed in all but one of the calibration through-holes. This invention achieves normal operation of atmospheric black carbon monitoring equipment for black carbon concentration monitoring and calibration by having one calibration through-hole without a calibration plate, the remaining calibration through-holes installed with calibration plates, and the calibration disk driven by the drive device. This allows the calibration through-holes on the calibration disk to sequentially pass through the connection between the sampling chamber and the vacuum chamber, enabling normal use of the atmospheric black carbon monitoring equipment for black carbon concentration monitoring and calibration. It has the advantages of simple structure and reliable operation.

Description

Technical Field

[0001] This invention relates to the field of black carbon monitoring equipment technology, specifically to a calibration device and an atmospheric black carbon monitoring device having the device. Background Technology

[0002] Black carbon aerosol pollution, formed from black carbon particles in the atmosphere, poses a threat to global climate, agricultural production, buildings, and even human health. These nanoscale black carbon particles can not only diffuse through the atmosphere, causing respiratory diseases, but also enter water and soil environments through atmospheric dry and wet deposition, thus affecting the migration and transformation of pollutants in water and soil. Black carbon aerosols have a complex physicochemical morphology: physically, they are generally in the form of submicron particles with strong light absorption; chemically, they are generally insoluble in polar and nonpolar solvents and remain stable when heated to 350-400 degrees Celsius in air or oxygen; structurally, they exhibit a disordered, locally formed graphite ring-like microcrystalline morphology. Black carbon aerosols can only be measured by light absorption or photothermal desorption-oxidation methods. Through certain experimental techniques, the equivalence between black carbon (BC) and elemental carbon can be established.

[0003] In the existing technology, the standard "Special Specification for Observation of Black Carbon in Aerosols - Optical Attenuation Method" (QX / T-2020-58) provides a method for detecting black carbon aerosols using the optical attenuation method. Specifically, it utilizes the strong light absorption property of black carbon to collect particulate matter in the atmosphere onto a filter membrane, and then detects the optical attenuation caused by the transmission of monochromatic light to the sample, thereby realizing the measurement of the mass concentration of black carbon in the atmosphere. This method has the advantages of simple measurement equipment structure, reliable operation, convenient maintenance, and suitability for long-term continuous measurement.

[0004] However, existing technologies still have significant shortcomings. For example, existing technologies collect light attenuation signals and measure the mass concentration of atmospheric black carbon through relevant calculation equations. However, the instruments are unstable during operation, and the attenuation of light after passing through different parts of the same filter paper tape is not the same. This has an adverse effect on the subsequent measurement of atmospheric black carbon mass concentration by substituting it into relevant calculation equations, resulting in poor accuracy of atmospheric black carbon mass concentration measurement results. Summary of the Invention

[0005] The purpose of this invention is to provide a calibration device and an atmospheric black carbon monitoring device having the device, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A calibration device, comprising:

[0008] The calibration disk, which is movably clamped between the sampling chamber and the vacuum chamber, has not less than two calibration through holes, and calibration plates are installed in all calibration through holes except for one calibration through hole.

[0009] The driving mechanism, installed on the sampling chamber or vacuum chamber, drives the calibration disk to move, so that the calibration through hole on the calibration disk passes sequentially through the connection between the sampling chamber and the vacuum chamber.

[0010] Preferably, the calibration disk of the disc structure has at least three calibration through holes evenly distributed in a ring on it, and the light attenuation is different after the light shines through different calibration plates. The driving mechanism includes a drive rod driven by a drive motor and equipped with gear teeth, and the calibration disk has gear teeth that mesh with the drive rod.

[0011] Preferably, a plug rod with an elastic clip is fixedly connected to the center of the calibration disk, and the sampling chamber is provided with a plug groove for the plug rod to be rotated and inserted. The plug groove includes two locking grooves that lock the elastic clip, and the two locking grooves are spaced apart along the direction close to the calibration disk.

[0012] Preferably, the calibration disk is fixedly connected to an elastic push block that is sleeved outside the plug rod, and the elastic push block has a cavity inside, and the calibration disk has an air delivery groove that connects the cavity and the inner wall of the calibration through hole with the calibration plate.

[0013] Preferably, a first gas limiting unit is provided between the cavity and the air delivery slot, which can only allow the cavity to deliver air to the air delivery slot, and a second gas limiting unit is installed on the side wall of the elastic push block, which can only deliver air to the cavity.

[0014] Preferably, the cavity and the air delivery slot are connected by a connecting slot, and the first air limiting unit includes a first air baffle and a first limiting slide rod. The L-shaped first limiting slide rod includes a horizontal bar fixed on the inner wall of the connecting slot and a vertical bar extending into the cavity, and the first air baffle is slidably sleeved on the vertical bar and cooperates to block the cavity.

[0015] Preferably, the second air limiting unit includes a vent pipe fixedly inserted into the cavity, a second air baffle plate located in the cavity, and a second limiting slide rod. The L-shaped second limiting slide rod includes a vertical rod fixed on the vent pipe and a horizontal rod parallel to the axis of the vent pipe and extending in a direction away from the vent pipe. The second air baffle plate is slidably sleeved on the horizontal rod and cooperates to block the vent pipe. A slide rod baffle plate is fixedly connected to the end of the horizontal rod away from the vent pipe.

[0016] Preferably, the calibration disk has a positioning through hole, and a positioning optical coupler transmitter and a positioning optical coupler receiver are fixedly installed on the sampling chamber and the vacuum chamber, respectively. The driving device is equipped with an indicator light that is connected to the positioning optical coupler receiver. The calibration disk blocks the transmission of optical signals between the positioning optical coupler transmitter and the positioning optical coupler receiver. When the calibration disk moves to the calibration through hole without the calibration plate, which connects the sampling chamber and the vacuum chamber, the optical signal between the positioning optical coupler transmitter and the positioning optical coupler receiver is transmitted through the positioning through hole.

[0017] Preferably, the end face of the calibration plate near the sampling chamber and the vacuum chamber is fixedly connected with an elastic pad, and the elastic pad has a through hole aligned with the through hole on the calibration plate.

[0018] An atmospheric black carbon monitoring device includes the aforementioned calibration device, a sampling mechanism consisting of a sampling chamber, a filter paper tape and a vacuum chamber, and a detection mechanism for detecting black carbon concentration.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The calibration device of the present invention and the atmospheric black carbon monitoring device having the device are configured such that calibration plates are not installed in one calibration through hole, calibration plates are installed in the other calibration through holes, and the calibration disk is driven by a driving device to move, so that each calibration through hole on the calibration disk passes through the connection between the sampling chamber and the vacuum chamber in sequence, so as to realize the normal use of atmospheric black carbon monitoring equipment for black carbon concentration monitoring and calibration of atmospheric black carbon monitoring equipment. It has the advantages of simple structure and reliable operation. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the calibration disk of the present invention;

[0022] Figure 2 This is a top view of the calibration disk of the present invention;

[0023] Figure 3 This is a top view cross-sectional diagram of the calibration disk of the present invention;

[0024] Figure 4 This is a schematic diagram of the calibration disk being held between the sampling chamber and the vacuum chamber in this invention;

[0025] Figure 5 for Figure 4 A schematic diagram showing the flexible card head engaged in a card slot.

[0026] Figure 6 This is a schematic diagram showing the state in which the elastic card head is engaged with another card slot in this invention;

[0027] Figure 7 This is a schematic diagram showing the state in which the first baffle plate blocks the cavity when the cavity is drawing air in according to the present invention;

[0028] Figure 8 This is a schematic diagram showing the state in which the second baffle plate blocks the vent pipe during cavity exhaust in this invention.

[0029] In the diagram: 1. Calibration plate, 101. Calibration through hole, 102. Gas supply groove, 103. Connecting groove, 104. Positioning through hole, 2. Calibration plate, 3. Drive rod, 4. Drive motor, 5. Connecting rod, 6. Elastic clamp, 7. Connecting groove, 71. Clamping groove, 8. Elastic push block, 81. Cavity, 9. First baffle plate, 10. First limiting slide bar, 11. Vent pipe, 12. Second baffle plate, 13. Second limiting slide bar, 131. Slide bar baffle, 14. Positioning optocoupler transmitter, 15. Positioning optocoupler receiver, 16. Elastic pad, 17. Sampling chamber, 18. Filter paper tape, 19. Vacuum chamber. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-8 The present invention provides a technical solution:

[0032] A calibration device includes a calibration disk 1, which is movably clamped between a sampling chamber 17 and a vacuum chamber 19. A filter paper strip 18 is also disposed between the sampling chamber 17 and the vacuum chamber 19. The calibration disk 1 can be clamped between the sampling chamber 17 and the filter paper strip 18, or between the filter paper strip 18 and the vacuum chamber 19. The calibration disk 1 has at least two calibration through holes 101, and calibration pieces 2 are installed in all but one of the calibration through holes 101. The calibration pieces 2 are of model SJOT1. The light attenuation glass plate of 4566998856 is used to make the calibration plate 2 simulate the light attenuation phenomenon after the light passes through black carbon. Specifically, the light attenuation after the light passes through the calibration plate 2 and the blank filter paper tape 18 is equivalent to the light attenuation after the light passes through the filter paper tape 18 with a certain concentration of black carbon. For example, the light attenuation after the light passes through the calibration plate 2 with a calibration value of 10% and the blank filter paper tape 18 is equivalent to the light attenuation after the light passes through the filter paper tape 18 with a concentration of 10% black carbon.

[0033] The drive mechanism, installed on the sampling chamber 17 or vacuum chamber 19, drives the calibration disk 1 to move. When the atmospheric black carbon monitoring equipment monitors the concentration of black carbon, the drive mechanism drives the calibration disk 1 to move, so that the calibration through hole 101 without calibration plate 2 on the calibration disk 1 is aligned and connected with the air outlet of the sampling chamber 17 and the air inlet of the vacuum chamber 19, so that air passes through the air outlet of the sampling chamber 17, the calibration through hole 101 without calibration plate 2, the filter paper tape 18 and the air inlet of the vacuum chamber 19 in sequence (or air passes through the air outlet of the sampling chamber 17, the filter paper tape 18, the calibration through hole 101 without calibration plate 2 and the air inlet of the vacuum chamber 19 in sequence).

[0034] When calibrating the atmospheric black carbon monitoring equipment, the air input to the sampling chamber 17 is stopped. The filter paper tape 18 slides under external force, allowing a new blank paper tape to move to the connection point between the sampling chamber 17 and the vacuum chamber 19. The drive mechanism continues to drive the calibration disk 1, aligning the calibration through-hole 101 with the calibration plate 2 with the air outlet of the sampling chamber 17 and the air inlet of the vacuum chamber 19. Light is then sequentially passed through the air outlet of the sampling chamber 17, the calibration through-hole 101 with the calibration plate 2, the filter paper tape 18, and the air inlet of the vacuum chamber 19 (or the light sequentially passes through the air outlet of the sampling chamber 17, the filter paper tape 18, the calibration through-hole 101 with the calibration plate 2, and the air inlet of the vacuum chamber 19). The light sensor located in the vacuum chamber 19 receives the attenuated light signal and, by substituting it into the equation, obtains the simulated value of the black carbon concentration. The simulated value of black carbon concentration is compared with the calibration value of calibration piece 2. If they are the same, it means that the atmospheric black carbon monitoring equipment is operating normally and does not need calibration. If they are different, it means that there is an error in the measurement of the atmospheric black carbon monitoring equipment. Subsequently, by changing the parameters of the calculation equation, the simulated value of black carbon concentration obtained by calculation is made to be the same as the calibration value of calibration piece 2, thus completing the calibration. By not installing calibration piece 2 in one calibration through hole 101, installing calibration pieces in the other calibration through holes 101, and then driving the calibration disk to move by the drive device, the various calibration through holes 101 on the calibration disk 1 are sequentially set to cooperate at the connection between the sampling chamber and the vacuum chamber. This realizes the normal use of atmospheric black carbon monitoring equipment for black carbon concentration monitoring and calibration of atmospheric black carbon monitoring equipment. It has the advantages of simple structure and reliable operation.

[0035] As one implementation, the calibration disk 1 with a disc structure has four calibration through holes 101 evenly distributed in a ring. One calibration through hole 101 is not equipped with a calibration plate 2, while the other three calibration through holes 101 are equipped with calibration plates 2 of different light attenuation levels. Specifically, the calibration values ​​of the three calibration plates 2 are 10%, 50%, and 90%, respectively. The driving mechanism includes a drive rod 3 with gear teeth that is driven to rotate by a drive motor 4. The calibration disk 1 is equipped with gear teeth that mesh with the drive rod 3. The drive motor 4 drives the drive rod 3 to rotate, and the drive rod 3 drives the calibration disk 1 to rotate together through the meshing of the gear teeth, so that each calibration through hole 101 on the calibration disk 1 passes through the connection between the sampling chamber and the vacuum chamber in sequence.

[0036] A plug rod 5 with a flexible locking head 6 is fixedly connected to the center of the calibration disk 1. The sampling chamber 17 has a plug slot 7 for the plug rod 5 to be rotatably inserted into. The plug slot 7 includes two locking slots 71 that hold the flexible locking head 6, and the two locking slots 71 are spaced apart along the direction close to the calibration disk 1. Through the cooperation of the flexible locking head 6 and the locking slots 71, the plug rod 5 is rotatably connected inside the plug slot 7, thereby allowing the calibration disk 1 to be rotatably connected to the sampling chamber 17. When the atmospheric black carbon monitoring equipment monitors black carbon concentration, the flexible locking head 6 is inserted into the locking slot 71 furthest from the calibration disk 1. To ensure airtightness between the devices and prevent gas leakage from adversely affecting black carbon concentration monitoring, the calibration disc 1 is pressed against the sampling chamber 17. When calibrating the atmospheric black carbon monitoring equipment, the sampling chamber 17 and the filter paper strip 18 are separated, and the elastic clip 6 is inserted into the clip groove 71 near the calibration disc 1, so that the calibration disc 1 is away from the sampling chamber 17, making it easier to rotate the calibration disc 1. After the calibration disc 1 has been rotated, the elastic clip 6 is inserted into the clip groove 71 away from the calibration disc 1, and the sampling chamber 17 and the filter paper strip 18 are pressed together again to perform calibration.

[0037] Furthermore, the calibration disk 1 has a positioning through hole 104, and the sampling chamber 17 and the vacuum chamber 19 are respectively fixedly installed with a positioning optical coupler transmitter 14 and a positioning optical coupler receiver 15. The drive device is equipped with an indicator light connected to the positioning optical coupler receiver 15. When the calibration through hole 101 without the calibration piece 2 has not moved to the connection between the sampling chamber 17 and the vacuum chamber 19, the positioning through hole 104 deviates from the positioning optical coupler transmitter 14 and the positioning optical coupler receiver 15, causing the calibration disk 1 to block the light signal transmission between the positioning optical coupler transmitter 14 and the positioning optical coupler receiver 15. The indicator light does not illuminate, indicating to the operator that the calibration through hole 101 without the calibration piece 2 has not moved to the connection between the sampling chamber 17 and the vacuum chamber 19, and the black carbon concentration monitoring operation cannot be performed. When the calibration through-hole 101 with calibration plate 2 moves to the connection between sampling chamber 17 and vacuum chamber 19, the positioning through-hole 104 aligns with the positioning optocoupler transmitter 14 and the positioning optocoupler receiver 15. The optical signal between the positioning optocoupler transmitter 14 and the positioning optocoupler receiver 15 is transmitted through the positioning through-hole 104, and the indicator light illuminates, prompting the staff that the calibration through-hole 101 without calibration plate 2 has moved to the connection between sampling chamber 17 and vacuum chamber 19, and black carbon concentration monitoring can be performed. Through the coordinated setting of positioning through-hole 104, positioning optocoupler transmitter 14 and positioning optocoupler receiver 15, the staff can know whether the calibration through-hole 101 without calibration plate 2 has moved to the connection between sampling chamber 17 and vacuum chamber 19, which facilitates the normal operation of the black carbon concentration monitoring equipment.

[0038] Furthermore, elastic pads 16 are fixedly connected to the end faces of the calibration disk 1 near the sampling chamber 17 and the vacuum chamber 19. The setting of elastic pads 16 improves the airtightness when the calibration disk 1 is connected to the sampling chamber 17 and the filter paper tape 18. The elastic pads 16 have through holes that are aligned with the calibration through holes 101 and the positioning through holes 104 on the calibration disk 1, so that the elastic pads 16 do not hinder the normal operation of the calibration disk 1.

[0039] Furthermore, an elastic push block 8 is fixedly connected to the calibration disk 1, which is sleeved on the plug rod 5. The end of the elastic push block 8 away from the calibration disk 1 is movably pressed against the sampling chamber 17. The plug rod 5 provides a limiting guide for the elastic deformation process of the elastic push block 8, thereby improving the stability of the elastic deformation process of the elastic push block 8. In this embodiment, the elastic pad 16 is provided with a through hole for the elastic push block 8 to pass through. The elastic push block 8 is provided with a cavity 81 inside. The calibration disk 1 is provided with an air supply groove 102 that connects the cavity 81 and the inner wall of the calibration through hole 101 with the calibration piece 2. During the clamping process when the calibration disk 1 moves towards the sampling chamber 17, the elastic push block 8 is compressed, so that the air in the cavity 81 is sprayed into the calibration through hole 101 with the calibration piece 2 through the air supply groove 102. The air entering the calibration through hole 101 with the calibration piece 2 blows and removes dust from the calibration piece 2, thereby removing the dust adhering to the calibration piece 2 due to exposure to the external environment and improving the subsequent calibration accuracy.

[0040] Furthermore, a first gas limiting unit is provided between the cavity 81 and the air delivery groove 102, which can only allow air to be delivered from the cavity 81 to the air delivery groove 102. A second gas limiting unit is installed on the side wall of the elastic push block 8, which can only allow air to be delivered to the cavity 81. This allows the cavity 81 to expand and draw in air from the outside when the calibration plate 1 is away from the sampling chamber 17, and the cavity 81 to compress and blow air into the calibration through hole 101 with the calibration plate 2 when the calibration plate 1 is close to the sampling chamber 17. Compared with the method of only using the air delivery groove 102 that connects the cavity 81 and the inner wall of the calibration through hole 101 with the calibration plate 2 on the calibration plate 1, this avoids the problem that dust is drawn into the air delivery groove 102 when the cavity 81 expands, which would cause the dust-laden air to be blown into the calibration through hole 101 again when the cavity 81 is compressed in the future, thus adversely affecting the blowing and dust removal of the calibration plate 2. Both the first gas limiting unit and the second gas limiting unit can be one-way valves that restrict the one-way flow of fluid.

[0041] Specifically, the cavity 81 and the air supply slot 102 are connected by a connecting slot 103. The connecting slot 103 has an opening on the end face of the calibration plate 1, and the inner diameter of the connecting slot 103 is larger than the size of the connection point of the cavity 81 near the connecting slot 103, and the inner diameter of the connecting slot 103 is larger than the size of the connection point of the air supply slot 102 near the connecting slot 103. The first air limiting unit includes a first air baffle 9 and a first limiting slide rod 10. The size of the first air baffle 9 is smaller than the inner diameter of the connecting slot 103 but larger than the size of the connection point of the cavity 81 near the connecting slot 103. (L-shaped) The first limiting slide bar 10 includes a horizontal bar fixed on the inner wall of the connecting groove 103 and a vertical bar extending into the cavity 81. The vertical bar limits and guides the sliding process of the first baffle plate 9. When the cavity 81 expands and generates negative pressure, the first baffle plate 9 slides towards the cavity 81 under the suction of negative pressure and blocks the cavity 81. When the cavity 81 is compressed and generates positive pressure, the first baffle plate 9 slides away from the cavity 81 under the push of positive pressure and no longer blocks the cavity 81, so that the air in the cavity 81 enters the air delivery groove 102 through the connecting groove 103.

[0042] The second air-limiting unit includes a vent pipe 11 fixedly inserted into the cavity 81, a second air-blocking plate 12 located within the cavity 81, and a second limiting slide rod 13. The L-shaped second limiting slide rod 13 includes a vertical rod fixed to the vent pipe 11 and a horizontal rod parallel to the axis of the vent pipe 11 and extending away from the vent pipe 11. The horizontal rod limits and guides the sliding process of the second air-blocking plate 12. When the cavity 81 expands and generates negative pressure, the second air-blocking plate 12 slides away from the vent pipe 11 under the suction of negative pressure and leaves the vent pipe 11, allowing outside air to pass through. Under the negative pressure adsorption of cavity 81, the air enters cavity 81. When cavity 81 is compressed to generate positive pressure, the second baffle plate 12 slides towards the vent pipe 11 under the push of positive pressure and blocks the vent pipe 11, so that the air in cavity 81 cannot be discharged out through the vent pipe 11. The end of the crossbar away from the vent pipe 11 is fixedly connected to the sliding baffle plate 131. The sliding baffle plate 131 limits the sliding stroke of the second baffle plate 12 to prevent the second baffle plate 12 from falling off the crossbar. The first baffle plate 9 and the second baffle plate 12 are both lightweight hard plastic thin plates.

[0043] An atmospheric black carbon monitoring device includes the above-mentioned calibration device, and also includes a sampling mechanism consisting of a sampling chamber 17, a filter paper strip 18 and a vacuum chamber 19, and a detection mechanism for detecting black carbon concentration. The calibration disk 1 is rotated and clamped between the sampling chamber 17 and the filter paper strip 18.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calibration device, characterized in that, include: The calibration disk is movably clamped between the sampling chamber and the vacuum chamber. The calibration disk has at least two calibration through holes, and calibration plates are installed in all calibration through holes except for one calibration through hole. A drive mechanism is installed on the sampling chamber or vacuum chamber. The drive mechanism drives the calibration disk to move, and the calibration through hole on the calibration disk passes through the connection between the sampling chamber and the vacuum chamber in sequence. A plug rod with an elastic clip is fixedly connected to the center of the calibration disk, and the sampling chamber is provided with a plug groove for the plug rod to be rotated and inserted. The plug groove includes two locking grooves that lock the elastic clip, and the two locking grooves are spaced apart along the direction close to the calibration disk. The calibration disk is fixedly connected to an elastic push block that is sleeved outside the plug rod, and the elastic push block has a cavity inside, and the calibration disk has an air delivery groove that connects the cavity and the inner wall of the calibration through hole with calibration plate. A first gas limiting unit is provided between the cavity and the air delivery slot, which can only allow the cavity to deliver air to the air delivery slot, and a second gas limiting unit is installed on the side wall of the elastic push block, which can only deliver air to the cavity. The cavity and the air delivery slot are connected by a connecting slot, and the first air limiting unit includes a first air baffle and a first limiting slide rod. The L-shaped first limiting slide rod includes a horizontal bar fixed on the inner wall of the connecting slot and a vertical bar extending into the cavity. The first air baffle is slidably sleeved on the vertical bar and cooperates to block the cavity. The second air limiting unit includes a vent pipe fixedly inserted into the cavity, a second air baffle plate located in the cavity, and a second limiting slide rod. The L-shaped second limiting slide rod includes a vertical rod fixed on the vent pipe and a horizontal rod parallel to the axis of the vent pipe and extending away from the vent pipe. The second air baffle plate is slidably sleeved on the horizontal rod and cooperates to block the vent pipe. A slide rod baffle plate is fixedly connected to the end of the horizontal rod away from the vent pipe.

2. The calibration device according to claim 1, characterized in that: The calibration disk of the disc structure has at least three calibration through holes evenly distributed in a ring on it, and the light attenuation is different after the light shines through different calibration plates. The driving mechanism includes a drive rod driven by a drive motor and equipped with gear teeth, and the calibration disk has gear teeth that mesh with the drive rod.

3. The calibration device according to claim 1, characterized in that: The calibration disk has a positioning through hole, and a positioning optical coupler transmitter and a positioning optical coupler receiver are fixedly installed on the sampling chamber and the vacuum chamber, respectively. The drive mechanism is equipped with an indicator light that is connected to the signal of the positioning optical coupler receiver. The calibration disk blocks the transmission of optical signal between the positioning optical coupler transmitter and the positioning optical coupler receiver. When the calibration disk moves to the calibration through hole without the calibration plate, which connects the sampling chamber and the vacuum chamber, the optical signal between the positioning optical coupler transmitter and the positioning optical coupler receiver is transmitted through the positioning through hole.

4. The calibration apparatus according to any one of claims 1-3, characterized in that: The end face of the calibration plate near the sampling chamber and the vacuum chamber is fixedly connected with an elastic pad, and the elastic pad has a through hole aligned with the through hole on the calibration plate.

5. An atmospheric black carbon monitoring device, characterized in that: The calibration device according to claim 4 further includes a sampling mechanism consisting of a sampling chamber, a filter paper tape and a vacuum chamber, and a detection mechanism for detecting black carbon concentration.

Images