WO2022130854A1 - Brake dust measurement device and brake dust measurement method - Google Patents
Brake dust measurement device and brake dust measurement method Download PDFInfo
- Publication number
- WO2022130854A1 WO2022130854A1 PCT/JP2021/041718 JP2021041718W WO2022130854A1 WO 2022130854 A1 WO2022130854 A1 WO 2022130854A1 JP 2021041718 W JP2021041718 W JP 2021041718W WO 2022130854 A1 WO2022130854 A1 WO 2022130854A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brake
- flow path
- brake dust
- sampling
- main flow
- Prior art date
Links
- 239000000428 dust Substances 0.000 title claims abstract description 124
- 238000005259 measurement Methods 0.000 title abstract description 20
- 238000000691 measurement method Methods 0.000 title description 2
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000005070 sampling Methods 0.000 claims description 89
- 238000000034 method Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 5
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000004308 accommodation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2208—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with impactors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
Definitions
- the present invention relates to a brake dust measuring device and a brake dust measuring method.
- Patent Document 1 As a conventional brake dust measuring device, as shown in Patent Document 1, the brake is operated while applying air to the brake set in the chamber, and the brake dust generated at this time is collected and, for example, the amount thereof is measured. There is something to measure. By accommodating the brake in the chamber in this way, it is possible to reduce the influence of the background due to the suspended particles existing in the room.
- a blower is installed on the side of the chamber, and the air is blown into the chamber from the blower. Brake dust could fall to the bottom of the chamber before it could mix with the air, causing measurement errors.
- restrictions are imposed on the installation location of the device in order to secure the installation space.
- Patent Document 2 the device shown in Patent Document 2 is known as a device for sending air into the chamber from above.
- Patent Document 2 the main purpose of applying air to the brake is cooling of the brake, and no specific configuration for applying undisturbed airflow to the brake has been examined.
- the main object of the present invention is to suppress the loss of brake dust by applying an undisturbed air flow to the brake, further reduce the measurement error, and further improve the measurement accuracy.
- the brake dust measuring device is a brake dust measuring device that measures brake dust generated from a brake, and is connected to a chamber accommodating the brake and the chamber to supply gas from the supply port to the brake.
- a supply duct that is connected to the chamber and discharges the brake dust that flows into the discharge port together with the gas, and a measurement mechanism that collects and measures the brake dust that flows through the discharge duct.
- the brake is arranged vertically below the supply port, and the discharge port is arranged vertically below the brake.
- the minimum diameter of the supply duct is smaller than the maximum diameter of the chamber, and the brake.
- the brake pad constituting the above is characterized in that it is housed inside the supply port when viewed from the vertical direction.
- the supply port, the brake, and the discharge port are arranged along the vertical direction, and the brake pad, which is the main generation point of the brake dust, is viewed from the vertical direction. Since it is housed inside the supply port, the flow velocity around the brake can be made uniform (constant), and the airflow that is as undisturbed as possible can be applied to the brake. As a result, the loss of generated brake dust can be suppressed, the measurement error can be further reduced, and the measurement accuracy can be further improved.
- the supply port is 70% or more of the diameter of the brake disc constituting the brake. In this case, since the wind can be blown over a wide range of the brake disc, it is possible to more reliably prevent the brake dust from remaining in the chamber.
- the supply duct has a tapered portion that gradually expands toward the supply port. With such a configuration, it is possible to apply undisturbed wind to the brakes. As a result, the brake dust is less likely to be scattered in the chamber, and as much brake dust as possible can be discharged from the chamber.
- the supply port may be an embodiment in which the supply port has a circular shape or a polygonal shape, and the diameter thereof or the diameter of the circumscribed circle thereof is 300 mm or more. In this case, it is possible to blow a wide range of brake discs, for example, against brakes of various sizes.
- the supply port can be changed to the optimum size according to the size of the brake or the brake pad or the brake disc constituting the brake.
- the adapter can change the diameter of the supply port within a range of 80 mm or more and 200 mm or less.
- the height position of the shaft member of the brake disc constituting the brake is higher than the height position of the center of the chamber. In this case, since the shaft member of the brake disc is closer to the supply port than the discharge port, the wind can be applied to the brake pads and the brake disc while maintaining the momentum, and all the brake dust can be removed from the chamber as much as possible. Can be discharged.
- the shaft member of the brake disc constituting the brake is contained inside the supply port and the discharge port when viewed from the vertical direction.
- a main flow meter provided on the downstream side of the point and a control device that controls the sampling flow rate, which is the flow rate of the sampling flow path, so that the flow rate is proportional to the main flow rate, which is the flow rate of the main flow path.
- the downstream end of the sampling flow path is connected between the sampling point in the main flow path and the main flow meter, and the sample gas collected in the sampling flow path is taken into the main flow path. It is preferably configured to return to. With such a configuration, the sampling flow rate is controlled so that the flow rate is proportional to the main flow rate, so that even if the main flow rate is changed, the amount of brake dust and the like can be measured accurately.
- the main flow path through which the sample gas containing the brake dust flows and the sampling point set in the main flow rate are connected to the above.
- a control device for controlling the sampling flow rate, which is the flow rate of the sampling flow path, is provided so that the flow rate is proportional to the main flow rate, which is the flow rate of the road, and the measuring mechanism is the main flow rate measured by the main flow meter. Is corrected by the sampling flow rate measured by the sampling flow meter.
- the brake dust measuring method is a brake dust measuring method using a brake dust measuring device for measuring brake dust generated from a brake, wherein the brake dust measuring device includes a chamber accommodating the brake.
- a supply duct connected to the chamber and supplying gas to the brake from the supply port, a discharge duct connected to the chamber and discharging the brake dust flowing into the discharge port together with the gas, and a discharge duct flowing through the discharge duct.
- a measuring mechanism for collecting and measuring brake dust is provided, the brake is arranged vertically below the supply port, and the discharge port is arranged vertically below the brake, and the minimum diameter of the supply duct is set.
- the brake pad which is smaller than the maximum diameter of the chamber and constitutes the brake, is arranged so as to fit inside the supply port when viewed from the vertical direction, and the brake dust is measured by the measuring mechanism.
- the method According to such a brake dust measuring method, the same operation and effect as the above-mentioned brake dust measuring device can be obtained.
- the flow velocity around the brake becomes uniform, the airflow with as little turbulence as possible can be applied to the brake, and the loss of the generated brake dust can be suppressed, and the measurement can be performed. It is possible to further reduce the error and further improve the measurement accuracy.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus which concerns on one Embodiment of this invention.
- the schematic diagram which shows the structure around the chamber of the same embodiment. The schematic diagram which shows the positional relationship between the supply port of the supply duct of the same embodiment, and the brake pad.
- the flowchart which shows the brake dust measurement method of the same embodiment. The schematic diagram which shows the structure around a chamber in another embodiment.
- the schematic diagram which shows the structure of the adapter in other embodiments.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
- the schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
- the brake dust measuring device 100 is for measuring, for example, the amount of brake dust generated by operating the brake Z and testing the performance of the brake Z.
- the brake Z alone is configured to operate by connecting it to the brake dynamo D.
- the brake dust measuring device 100 may be for running a test vehicle, which is a completed vehicle, on a chassis dynamometer to test the performance of the brake Z of the test vehicle.
- the brake dust measuring device 100 supplies gas to the chamber 10 accommodating the brake Z as a specimen connected to the brake dynamo D and the brake Z operating in the chamber 10. It includes a supply flow path L1, a main flow path L2 through which brake dust generated from the brake Z flows together with the gas, and a measuring mechanism 20 for collecting and measuring brake dust flowing through the main flow path L2.
- the chamber 10 has an internal space formed as an accommodation space 10s for accommodating the brake Z, and is, for example, a cylindrical one.
- the supply flow path L1 is formed by a supply duct 11 connected to a part of the upper wall (wall surface) of the chamber 10.
- the supply duct 11 has a supply port O1 communicating with the inside of the chamber 10, and supplies gas such as air into the chamber 10 through the supply port O1.
- the minimum diameter of the supply duct 11 is smaller than the maximum diameter of the chamber 10, and specifically, the supply duct 11 is smaller than the diameter of the accommodation space 10s of the chamber 10 (that is, the inner diameter of the chamber 10). It is a pipe. That is, the minimum diameter dimension of the supply duct 11 viewed from the vertical direction is smaller than the maximum diameter dimension of the chamber 10 viewed from the vertical direction. As a result, the supplied air hits the operating brake Z.
- the gas applied to the brake Z is not necessarily limited to air, and may be changed as appropriate. Further, as shown in FIG. 1, the supply flow path L1 may be provided with one or a plurality of rectifying plates X1 for rectifying air, for example, at a curved portion.
- the main flow path L2 is formed by a discharge duct 12 connected to the bottom wall of the chamber 10.
- the discharge duct 12 has a discharge port O2 communicating with the inside of the chamber 10, and discharges brake dust flowing into the discharge port O2 from the chamber 10 together with air.
- the discharged air containing the brake dust flows through the main flow path L2 as a sample gas.
- the main flow path L2 may be provided with one or a plurality of straightening vanes X2 for rectifying the sample gas, for example, at a curved portion.
- the measuring mechanism 20 collects a part of the sample gas flowing through the main flow path L2 and measures the brake dust contained in the collected sample gas. Specifically, sampling is performed from the main flow path L2.
- a sampling flow path L3 for collecting a part of the gas and a collection filter F provided in the sampling flow path L3 for collecting the brake dust in the sample gas are provided.
- the measuring mechanism 20 of this embodiment is configured to proportionally sample the sample gas.
- the measuring mechanism 20 has a main flow rate adjusting unit P1 for adjusting the flow rate of the sample gas drawn from the chamber 10 into the main flow path L2 (hereinafter referred to as the main flow rate), and the main flow rate L2 to the sampling flow path L3. It is provided with a sampling flow rate adjusting unit P2 for adjusting the flow rate of the sample gas to be drawn in (hereinafter referred to as sampling flow rate).
- the main flow rate adjusting unit P1 and the sampling flow rate adjusting unit P2 include a blower, a pump, and a mass flow controller.
- the measuring mechanism 20 is configured to control, for example, the rotation speed of the sampling pump, which is the sampling flow rate adjusting unit P2, so that the ratio of the sampling flow rate to the main flow rate becomes a predetermined diversion ratio.
- the main flow rate and the sampling flow rate here are mass flow rates.
- the measuring mechanism 20 may have a function as a brake dust amount calculation unit that calculates the total amount of brake dust by multiplying the brake dust amount by the diversion ratio between the main flow rate and the sampling flow rate.
- the above-mentioned supply port O1 of the supply duct 11, the brake Z in the chamber 10, and the discharge port O2 of the discharge duct 12 are provided. It is arranged along the vertical direction.
- the brake Z is arranged vertically below the supply port O1 and the discharge port O2 is arranged vertically below the brake Z. ing.
- the supply port O1 and the discharge port O2 are arranged so as to face each other in the vertical direction, and the brake Z is held between the supply port O1 and the discharge port O2.
- the brake dust measuring device 100 here includes a mounting jig 30 to which a brake Z is mounted and which holds the brake Z vertically below the supply port O1 in the chamber 10. There is.
- the brake pad Z1 constituting the brake Z is arranged so as to be accommodated inside the supply port O1 when viewed from the vertical direction. Then, each of the pair of brake pads Z1 is arranged so as to fit inside both the supply port O1 and the discharge port O2 when viewed from the vertical direction.
- the discharge port O2 is larger than the supply port O1, but the discharge port O2 may be smaller than the supply port O1. May be there.
- the height position Zh of the shaft member Z3 of the brake disc Z2 constituting the brake Z is above the height position 10h at the center of the chamber 10. That is, the mounting jig 30 of the present embodiment holds the brake Z so that the height position Zh of the shaft member Z3 of the brake disc Z2 is higher than the height position 10h of the center of the chamber 10. ..
- the shaft member Z3 of the brake disc Z2 is housed inside the supply port O1 and the discharge port O2 when viewed from the vertical direction.
- the shaft member Z3 of the brake disc Z2 does not necessarily have to be above the height position 10h at the center of the chamber 10, and may be located below the height position 10h.
- the supply duct 11 of the present embodiment has a cylindrical shape, and the supply port O1 thereof has a circular shape.
- the diameter D1 of the supply port O1 is 70% or more of the diameter D2 of the brake disc Z2, which is larger than the diameter D2 of the brake disc Z2, specifically 300 mm or more. be.
- the supply duct 11 of the present embodiment has a tapered shape in which the downstream end thereof gradually expands toward the supply port O1.
- the supply duct 11 in this embodiment includes a straight pipe portion 111 extending along the vertical direction and a tapered portion 112 gradually expanding from the straight pipe portion 111 toward the supply port O1.
- the taper portion 112 has an expansion angle ⁇ of less than 270 °.
- the expansion angle referred to here is an angle formed by the inner peripheral surface 111a of the straight pipe portion 111 and the inner peripheral surface 112a of the tapered portion 112.
- the brake Z is placed in the chamber 10. Specifically, the brake Z is attached to the mounting jig 30, and the brake pads Z1 constituting the brake Z are arranged so that the entire brake pad Z1 is accommodated inside the supply port O1 when viewed from the vertical direction (S1). At this time, in the present embodiment, the entire brake pad Z1 is set to fit inside the discharge port O2 when viewed from the vertical direction. Further, in the present embodiment, the shaft member Z3 of the brake disc Z2 is arranged so as to fit inside the supply port O1 and the discharge port O2 when viewed from the vertical direction.
- the amount of brake dust collected by the collection filter F the total mass of brake dust in one test, or the mass of brake dust per unit mileage is calculated from the amount of brake dust. (S4).
- the supply port O1 of the supply duct 11, the brake Z, and the discharge port O2 of the discharge duct 12 are arranged along the vertical direction, and moreover, the brake dust Since the brake pad Z1 which is the main generation point is housed inside the supply port O1 when viewed from the vertical direction, the flow velocity around the brake Z can be made uniform (constant), and the airflow is as undisturbed as possible. Can be applied to the brake Z. As a result, the loss of the generated brake dust can be suppressed, the measurement error can be reduced, and the measurement accuracy can be improved. Further, by the above-mentioned arrangement, as much as possible of the generated brake dust can be guided to the discharge port O2 without remaining in the chamber 10, so that the measurement error can be further reduced and the measurement accuracy can be further improved. I can plan.
- the diameter D1 of the supply port O1 is 70% or more of the diameter D2 of the brake disc Z2 constituting the brake Z, the wind can be blown over a wide range of the brake disc Z2, so that the brake dust is in the chamber 10. It is possible to more reliably suppress the residual.
- the supply duct 11 has a tapered portion 112 that gradually expands toward the supply port O1, an undisturbed wind can be applied to the brake Z. As a result, the brake dust is less likely to be scattered in the chamber 10, and as much brake dust as possible can be discharged from the chamber 10.
- the shaft member D3 of the brake disc Z2 is located above the discharge port O2. Also close to the supply port O1, the wind can be applied to the brake pads Z1 and the brake disc Z2 while maintaining the momentum, and all the brake dust can be discharged from the chamber 10 as much as possible.
- the present invention is not limited to the above embodiment.
- the supply duct 11 of the above embodiment was connected to the upper wall of the chamber 10, but as shown in FIG. 5, the supply duct 11 penetrates the upper wall of the chamber 10, and the supply port O1 is the chamber 10. It may be arranged inside.
- the tapered portion 112 having a tapered downstream end portion extends toward the supply port O1, but as shown in FIG. 6, the supply duct 11 does not necessarily have a tapered portion. It is not necessary to provide the 112, and the straight pipe portion 111 may extend to the supply port O1.
- the measuring device 100 may be arranged so that at least the brake pad Z1 is accommodated inside the supply port O1 when viewed from the vertical direction.
- the brake dust measuring device 100 may include a plurality of adapters 113 capable of changing the size of the supply port O1.
- these adapters 113 constitute the supply duct 11, and are detachable from, for example, the straight pipe portion 111.
- Examples of such an adapter include an adapter in which the diameter of the supply port O1 can be changed in the range of, for example, 80 mm or more and 200 mm or less. With such a configuration, the supply port O1 can be changed to an optimum size according to the size of the brake Z or the brake pad Z1 or the brake disc Z2 constituting the brake Z.
- the supply duct 11 has a cylindrical shape and the supply port O1 has a circular shape.
- the supply duct 11 has a cylindrical shape having a polygonal cross section such as a quadrangle. It may be.
- the supply port O1 may also have a polygonal shape, and the diameter of the circumscribed circle thereof may be 300 mm or more.
- the brake dust measuring device 100 includes a main as shown in FIG.
- the main flow meter FM1 provided in the flow path L2 and the sampling flow meter FM2 provided in the sampling flow path L3 may be further provided.
- the main flow meter FM1 is provided on the downstream side of the sampling point X, which is the connection point of the sampling flow path L2 in the main flow path L1, but may be provided on the upstream side of the sampling point X. good. Further, although the sampling flow meter FM2 is provided on the downstream side of the filter F in FIG. 8, it may be provided on the upstream side of the filter F.
- the brake dust measuring device 100 has a main flow rate so that the sampling flow rate measured by the sampling flow meter FM2 is proportional to the main flow rate measured by the main flow meter FM1.
- a control device C that controls one or both of the adjusting unit P1 and the sampling flow rate adjusting unit P2 may be provided. That is, the brake dust measuring device 100 has a flow rate of the main flow path L2 and a flow rate of the sampling flow path L3 so that the flow rate is proportional to the main flow rate, which is the flow rate of the main flow path L2, by the control device C.
- the sampling flow rate is set.
- the sampling flow rate is controlled so that the flow rate is proportional to the main flow rate, so even if the main flow rate is fluctuated, it is possible to accurately measure the amount of brake dust and the like.
- the downstream end portion of the sampling flow path L3 is connected to the downstream side of the sampling point in the main flow path L2, and the sampling flow path L3 It may be configured to return the sample gas collected in the main flow path L2 to the main flow path L2.
- the sampling flow rate can be more accurately set to the flow rate proportional to the main flow rate.
- the control device 20C corrects the main flow rate measured by the main flow meter FM1 with the sampling flow rate measured by the sampling flow meter FM2. Aspects are given. Specifically, the flow rate control unit 21 adds the sampling flow rate measured by the sampling flow meter FM2 to the main flow rate measured by the main flow meter FM1, and the main flow rate adjusting unit is based on the flow rate after the addition. It may be configured to control one or both of P1 and the sampling flow rate adjusting unit P2.
- the brake dust measuring device 100 includes a sampling bag for collecting sample gas in place of the collection filter F or in addition to the collection filter F, and measures various components contained in the collected sample gas.
- the component to be measured include a component such as hydrocarbon derived from brake dust and / or a component contained in the exhaust gas.
- the sampling bag SB may be provided, for example, on the downstream side of the sampling flow rate adjusting unit P2, or as shown in FIG. 10, it is provided in a second sampling flow path L4 separate from the sampling flow path L3. May be.
- the second sampling flow path L4 may be provided with a sampling pump P3 or the like as a second sampling flow rate adjusting unit.
- the sampling point of the second sampling flow path L4 may be upstream or downstream of the sampling point of the sampling flow path L3.
- the measurement of the sample gas collected in the sampling bag and the measurement of the brake dust may be performed at the same time or separately.
- the brake dust measuring device 100 may be configured to allow air to flow laterally (or substantially horizontally) in the chamber 10, and is shown in the figure.
- the air may be configured to flow in the chamber 10 in an oblique direction inclined with respect to each of the horizontal direction and the vertical direction.
- an air supply port O1 and an air discharge port O2 are provided on the side peripheral surface of the chamber 10 can be mentioned.
- the supply port O1 and the discharge port O2 may be arranged so as to face each other, or may be arranged so as to face each other.
- the brake dust amount calculation unit for calculating the amount of brake dust collected by the collection filter F has been described, but instead of the collection filter F or in addition to the collection filter F, dust is described.
- a DCS diffusion Changer Sensor
- a PN Particle Number measuring instrument may be provided in the sampling flow path L3 so as to exert a function as a dust collection unit and an analysis unit. good.
- the concept including at least one of the collection filter F, the brake dust amount calculation unit, the exhaust gas analyzer, the DCS, and the PN measuring instrument may be referred to as a brake dust analysis unit.
- the flow velocity around the brake becomes uniform, the airflow with as little turbulence as possible can be applied to the brake, and the loss of the generated brake dust can be suppressed, and the measurement can be performed. It is possible to further reduce the error and further improve the measurement accuracy.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
Description
これならば、ブレーキディスクの広範囲に風を当てることができるので、ブレーキダストがチャンバ内に残存してしまうことをより確実に抑えることができる。 It is preferable that the supply port is 70% or more of the diameter of the brake disc constituting the brake.
In this case, since the wind can be blown over a wide range of the brake disc, it is possible to more reliably prevent the brake dust from remaining in the chamber.
このような構成であれば、乱れのない風をブレーキに当てることができる。これにより、ブレーキダストはチャンバ内で散乱しにくく、ブレーキダストの可及的に全てをチャンバから排出させることができる。 It is preferable that the supply duct has a tapered portion that gradually expands toward the supply port.
With such a configuration, it is possible to apply undisturbed wind to the brakes. As a result, the brake dust is less likely to be scattered in the chamber, and as much brake dust as possible can be discharged from the chamber.
これならば、種々のサイズのブレーキに対して、例えばブレーキディスクの広範囲に風を当てることができる。 Further, as a more specific embodiment of the supply port, there may be an embodiment in which the supply port has a circular shape or a polygonal shape, and the diameter thereof or the diameter of the circumscribed circle thereof is 300 mm or more.
In this case, it is possible to blow a wide range of brake discs, for example, against brakes of various sizes.
これならば、ブレーキ或いはブレーキを構成するブレーキパットやブレーキディスクなどのサイズに応じて供給口を最適な大きさに変更することができる。 In order to make the measuring device compatible with brakes of various sizes, it is preferable to have an adapter capable of changing the size of the supply port.
In this case, the supply port can be changed to the optimum size according to the size of the brake or the brake pad or the brake disc constituting the brake.
これならば、ブレーキディスクの軸部材が、排出口よりも供給口に近いので、勢いを保ったまま風をブレーキパットやブレーキディスクに当てることができ、可及的に全てのブレーキダストをチャンバから排出することができる。 It is preferable that the height position of the shaft member of the brake disc constituting the brake is higher than the height position of the center of the chamber.
In this case, since the shaft member of the brake disc is closer to the supply port than the discharge port, the wind can be applied to the brake pads and the brake disc while maintaining the momentum, and all the brake dust can be removed from the chamber as much as possible. Can be discharged.
このような構成であれば、メイン流量に比例した流量となるようにサンプリング流量を制御するので、仮にメイン流量を変動させた場合でも、ブレーキダスト量などを精度よく測定することが可能となる。 A main flow path through which a sample gas containing the brake dust flows, a sampling flow rate connected to a sampling point set in the main flow path to collect a part of the sample gas, and the sampling in the main flow rate. A main flow meter provided on the downstream side of the point and a control device that controls the sampling flow rate, which is the flow rate of the sampling flow path, so that the flow rate is proportional to the main flow rate, which is the flow rate of the main flow path. The downstream end of the sampling flow path is connected between the sampling point in the main flow path and the main flow meter, and the sample gas collected in the sampling flow path is taken into the main flow path. It is preferably configured to return to.
With such a configuration, the sampling flow rate is controlled so that the flow rate is proportional to the main flow rate, so that even if the main flow rate is changed, the amount of brake dust and the like can be measured accurately.
このようなブレーキダスト測定方法によれば、上述したブレーキダスト測定装置と同様の作用効果を奏し得る。 Further, the brake dust measuring method according to the present invention is a brake dust measuring method using a brake dust measuring device for measuring brake dust generated from a brake, wherein the brake dust measuring device includes a chamber accommodating the brake. A supply duct connected to the chamber and supplying gas to the brake from the supply port, a discharge duct connected to the chamber and discharging the brake dust flowing into the discharge port together with the gas, and a discharge duct flowing through the discharge duct. A measuring mechanism for collecting and measuring brake dust is provided, the brake is arranged vertically below the supply port, and the discharge port is arranged vertically below the brake, and the minimum diameter of the supply duct is set. The brake pad, which is smaller than the maximum diameter of the chamber and constitutes the brake, is arranged so as to fit inside the supply port when viewed from the vertical direction, and the brake dust is measured by the measuring mechanism. The method.
According to such a brake dust measuring method, the same operation and effect as the above-mentioned brake dust measuring device can be obtained.
Z ・・・ブレーキ
Z1 ・・・ブレーキパッド
Z2 ・・・ブレーキディスク
Z3 ・・・軸部材
10 ・・・チャンバ
11 ・・・供給ダクト
O1 ・・・供給口
12 ・・・排出ダクト
O2 ・・・排出口
20 ・・・測定機構
D1 ・・・供給口の直径
D2 ・・・ブレーキディスクの直径
112・・・テーパ部
θ ・・・拡がり角度 100 ・ ・ ・ Brake dust measuring device Z ・ ・ ・ Brake Z1 ・ ・ ・ Brake pad Z2 ・ ・ ・ Brake disc Z3 ・ ・ ・
なお、ブレーキダスト測定装置100としては、完成車両たる試験車両をシャシダイナモメータ上で走行させて、その試験車両のブレーキZの性能を試験するためのものであっても良い。 As shown in FIG. 1, the brake
The brake
さらに、上述した配置により、発生したブレーキダストの可及的に全てを、チャンバ10内に残存させることなく、排出口O2に導くことができるので、測定誤差のさらなる低減並びに測定精度のさらなる向上を図れる。 According to the brake
Further, by the above-mentioned arrangement, as much as possible of the generated brake dust can be guided to the discharge port O2 without remaining in the
このような構成であれば、ブレーキZ或いはブレーキZを構成するブレーキパッドZ1やブレーキディスクZ2などのサイズに応じて供給口O1を最適な大きさに変更することができる。 Further, as shown in FIG. 7, the brake
With such a configuration, the supply port O1 can be changed to an optimum size according to the size of the brake Z or the brake pad Z1 or the brake disc Z2 constituting the brake Z.
また、サンプリング流量計FM2は、図8においては、フィルタFの下流側に設けられているが、フィルタFの上流側に設けられていても良い。 In FIG. 8, the main flow meter FM1 is provided on the downstream side of the sampling point X, which is the connection point of the sampling flow path L2 in the main flow path L1, but may be provided on the upstream side of the sampling point X. good.
Further, although the sampling flow meter FM2 is provided on the downstream side of the filter F in FIG. 8, it may be provided on the upstream side of the filter F.
すなわち、このブレーキダスト測定装置100は、制御装置Cによって、メイン流路L2の流量であるメイン流量に比例した流量となるように、メイン流路L2の流量と、サンプリング流路L3の流量であるサンプリング流量が設定される。 Then, as shown in FIG. 8, the brake
That is, the brake
これならば、採取したサンプルガスがメイン流路L2に戻された後の流量をメイン流量として計測することができるので、より精度良くサンプリング流量をメイン流量に比例した流量とすることができる。 Further, in the brake
In this case, since the flow rate after the collected sample gas is returned to the main flow path L2 can be measured as the main flow rate, the sampling flow rate can be more accurately set to the flow rate proportional to the main flow rate.
具体的には、流量制御部21が、メイン流量計FM1により計測されたメイン流量に、サンプリング流量計FM2により計測されたサンプリング流量を加算して、その加算後の流量に基づいてメイン流量調整部P1とサンプリング流量調整部P2との一方又は両方を制御するように構成されていても良い。 As another embodiment for accurately proportionalizing the sampling flow rate to the main flow rate, the control device 20C corrects the main flow rate measured by the main flow meter FM1 with the sampling flow rate measured by the sampling flow meter FM2. Aspects are given.
Specifically, the flow rate control unit 21 adds the sampling flow rate measured by the sampling flow meter FM2 to the main flow rate measured by the main flow meter FM1, and the main flow rate adjusting unit is based on the flow rate after the addition. It may be configured to control one or both of P1 and the sampling flow rate adjusting unit P2.
この場合、サンプリングバッグSBは、例えばサンプリング流量調整部P2の下流側に設けられていても良いし、図10に示すように、サンプリング流路L3とは別の第2のサンプリング流路L4に設けても良い。なお、図10に示す構成においては、第2のサンプリング流路L4には、第2のサンプリング流量調整部たるサンプリングポンプP3などが設けられていても良い。なお、第2のサンプリング流路L4のサンプリングポイントは、サンプリング流路L3のサンプリングポイントの上流であっても良いし、下流であっても良い。
このようにサンプリングバッグSBを備える構成において、サンプリングバッグに採取したサンプルガスの計測と、ブレーキダストの計測とは、同時に行われても良いし、別々に行われても良い。 Further, the brake
In this case, the sampling bag SB may be provided, for example, on the downstream side of the sampling flow rate adjusting unit P2, or as shown in FIG. 10, it is provided in a second sampling flow path L4 separate from the sampling flow path L3. May be. In the configuration shown in FIG. 10, the second sampling flow path L4 may be provided with a sampling pump P3 or the like as a second sampling flow rate adjusting unit. The sampling point of the second sampling flow path L4 may be upstream or downstream of the sampling point of the sampling flow path L3.
In the configuration including the sampling bag SB as described above, the measurement of the sample gas collected in the sampling bag and the measurement of the brake dust may be performed at the same time or separately.
具体的な実施態様としては、チャンバ10の側周面に空気の供給口O1及び排出口O2が設けられている態様を挙げることができる。なお、供給口O1及び排出口O2は、互いに対向するように配置されていても良いし、非対向な配置であっても良い。 Further, as shown in FIG. 11, the brake
As a specific embodiment, an embodiment in which an air supply port O1 and an air discharge port O2 are provided on the side peripheral surface of the
なお、捕集フィルタF、ブレーキダスト量算出部、排ガス分析装置、DCS、PN計測器の少なくとも1つを含む概念をブレーキダスト分析部と呼んでも良い。 Further, in the above embodiment, the brake dust amount calculation unit for calculating the amount of brake dust collected by the collection filter F has been described, but instead of the collection filter F or in addition to the collection filter F, dust is described. A DCS (Diffusion Changer Sensor) that functions as a collecting unit and an analysis unit may be installed in the sampling flow path L3 so that the collection and analysis of brake dust can be performed at the same time, for example. Similarly, instead of the collection filter F or in addition to the collection filter F, a PN (Particle Number) measuring instrument may be provided in the sampling flow path L3 so as to exert a function as a dust collection unit and an analysis unit. good.
The concept including at least one of the collection filter F, the brake dust amount calculation unit, the exhaust gas analyzer, the DCS, and the PN measuring instrument may be referred to as a brake dust analysis unit.
Claims (12)
- ブレーキから発生するブレーキダストを測定するブレーキダスト測定装置であって、
前記ブレーキを収容するチャンバと、
前記チャンバに接続されて、供給口からガスを前記ブレーキに供給する供給ダクトと、
前記チャンバに接続されて、排出口に流れ込むブレーキダストを前記ガスとともに排出する排出ダクトと、
前記排出ダクトを流れるブレーキダストを採取して測定する測定機構とを備え、
前記供給口の鉛直下方に前記ブレーキが配置されるとともに、前記ブレーキの鉛直下方に前記排出口が配置されており、
前記供給ダクトの最小の径は、前記チャンバの最大の径よりも小さく、
前記ブレーキを構成するブレーキパッドが、鉛直方向から視て前記供給口の内側に収まっている、ブレーキダスト測定装置。 A brake dust measuring device that measures brake dust generated from the brakes.
The chamber that houses the brake and
A supply duct connected to the chamber and supplying gas to the brake from the supply port,
A discharge duct connected to the chamber and discharging brake dust flowing into the discharge port together with the gas,
It is equipped with a measuring mechanism that collects and measures the brake dust flowing through the discharge duct.
The brake is arranged vertically below the supply port, and the discharge port is arranged vertically below the brake.
The minimum diameter of the supply duct is smaller than the maximum diameter of the chamber.
A brake dust measuring device in which a brake pad constituting the brake is housed inside the supply port when viewed from a vertical direction. - 前記供給口が、前記ブレーキを構成するブレーキディスクの径の70%以上である、請求項1記載のブレーキダスト測定装置。 The brake dust measuring device according to claim 1, wherein the supply port is 70% or more of the diameter of the brake disc constituting the brake.
- 前記供給ダクトが、前記供給口に向かって徐々に拡がるテーパ部を有する、請求項1又は2記載のブレーキダスト測定装置。 The brake dust measuring device according to claim 1 or 2, wherein the supply duct has a tapered portion that gradually expands toward the supply port.
- 前記テーパ部の拡がり角度が270°未満である、請求項3記載のブレーキダスト測定装置。 The brake dust measuring device according to claim 3, wherein the spread angle of the tapered portion is less than 270 °.
- 前記供給口が、円形状又は多角形状をなし、その直径又はその外接円の直径が、300mm以上である、請求項1乃至4のうち何れか一項に記載のブレーキダスト測定装置。 The brake dust measuring device according to any one of claims 1 to 4, wherein the supply port has a circular shape or a polygonal shape, and the diameter thereof or the diameter of the circumscribed circle thereof is 300 mm or more.
- 前記供給口の大きさを変更可能なアダプタを備えている、請求項1乃至5のうち何れか一項に記載のブレーキダスト測定装置。 The brake dust measuring device according to any one of claims 1 to 5, further comprising an adapter capable of changing the size of the supply port.
- 前記アダプタが、前記供給口の直径を80mm以上200mm以下の範囲で変更可能なものである、請求項6記載のブレーキダスト測定装置。 The brake dust measuring device according to claim 6, wherein the adapter can change the diameter of the supply port within a range of 80 mm or more and 200 mm or less.
- 前記ブレーキを構成するブレーキディスクの軸部材の高さ位置が、前記チャンバの中心の高さ位置よりも上方である、請求項1乃至7のうち何れか一項に記載のブレーキダスト測定装置。 The brake dust measuring device according to any one of claims 1 to 7, wherein the height position of the shaft member of the brake disc constituting the brake is higher than the height position of the center of the chamber.
- 前記ブレーキを構成するブレーキディスクの軸部材が、鉛直方向から視て前記供給口及び前記排出口の内側に収まっている、請求項1乃至8のうち何れか一項に記載のブレーキダスト測定装置。 The brake dust measuring device according to any one of claims 1 to 8, wherein the shaft member of the brake disc constituting the brake is housed inside the supply port and the discharge port when viewed from the vertical direction.
- 前記ブレーキダストを含むサンプルガスが流れるメイン流路と、
前記メイン流路に設定されたサンプリングポイントに接続されて、前記サンプルガスの一部を採取するサンプリング流路と、
前記メイン流路における前記サンプリングポイントよりも下流側に設けられたメイン流量計と、
前記メイン流路の流量であるメイン流量に比例した流量となるように、前記サンプリング流路の流量であるサンプリング流量を制御する制御装置とを備え、
前記サンプリング流路の下流側端部が、前記メイン流路における前記サンプリングポイントと前記メイン流量計との間に接続されており、前記サンプリング流路に採取した前記サンプルガスを前記メイン流路に戻すように構成されている、請求項1乃至9のうち何れか一項に記載のブレーキダスト測定装置。 The main flow path through which the sample gas containing the brake dust flows, and
A sampling flow path that is connected to a sampling point set in the main flow path and collects a part of the sample gas, and a sampling flow path.
A main flow meter provided on the downstream side of the sampling point in the main flow path, and
A control device for controlling the sampling flow rate, which is the flow rate of the sampling flow path, is provided so that the flow rate is proportional to the main flow rate, which is the flow rate of the main flow path.
The downstream end of the sampling flow path is connected between the sampling point in the main flow path and the main flow meter, and the sample gas collected in the sampling flow path is returned to the main flow path. The brake dust measuring device according to any one of claims 1 to 9, which is configured as described above. - 前記ブレーキダストを含むサンプルガスが流れるメイン流路と、
前記メイン流路に設定されたサンプリングポイントに接続されて、前記サンプルガスの一部を採取するサンプリング流路と、
前記メイン流路における前記サンプリングポイントよりも下流側に設けられたメイン流量計と、
前記サンプリング流路に設けられたサンプリング流量計と、
前記メイン流路の流量であるメイン流量に比例した流量となるように、前記サンプリング流路の流量であるサンプリング流量を制御する制御装置とを備え、
前記測定機構が、前記メイン流量計により計測されたメイン流量を、前記サンプリング流量計により計測されたサンプリング流量により補正する、請求項1乃至9のうち何れか一項に記載のブレーキダスト測定装置。 The main flow path through which the sample gas containing the brake dust flows, and
A sampling flow path that is connected to a sampling point set in the main flow path and collects a part of the sample gas, and a sampling flow path.
A main flow meter provided on the downstream side of the sampling point in the main flow path, and
A sampling flow meter provided in the sampling flow path and
A control device for controlling the sampling flow rate, which is the flow rate of the sampling flow path, is provided so that the flow rate is proportional to the main flow rate, which is the flow rate of the main flow path.
The brake dust measuring device according to any one of claims 1 to 9, wherein the measuring mechanism corrects the main flow rate measured by the main flow meter with the sampling flow rate measured by the sampling flow meter. - ブレーキから発生するブレーキダストを測定するブレーキダスト測定装置を用いたブレーキダスト測定方法であって、
前記ブレーキダスト測定装置が、
前記ブレーキを収容するチャンバと、
前記チャンバに接続されて、供給口からガスを前記ブレーキに供給する供給ダクトと、
前記チャンバに接続されて、排出口に流れ込むブレーキダストを前記ガスとともに排出する排出ダクトと、
前記排出ダクトを流れるブレーキダストを採取して測定する測定機構とを備え、
前記供給口の鉛直下方に前記ブレーキを配置するとともに、前記ブレーキの鉛直下方に前記排出口を配置し、
前記供給ダクトの最小の径は、前記チャンバの最大の径よりも小さく、
前記ブレーキを構成するブレーキパッドを、鉛直方向から視て前記供給口の内側に収まるように配置し、
前記測定機構によりブレーキダストを測定する、ブレーキダスト測定方法。 It is a brake dust measuring method using a brake dust measuring device that measures brake dust generated from a brake.
The brake dust measuring device
The chamber that houses the brake and
A supply duct connected to the chamber and supplying gas to the brake from the supply port,
A discharge duct connected to the chamber and discharging brake dust flowing into the discharge port together with the gas,
It is equipped with a measuring mechanism that collects and measures the brake dust flowing through the discharge duct.
The brake is arranged vertically below the supply port, and the discharge port is arranged vertically below the brake.
The minimum diameter of the supply duct is smaller than the maximum diameter of the chamber.
The brake pads constituting the brake are arranged so as to fit inside the supply port when viewed from the vertical direction.
A brake dust measuring method for measuring brake dust by the measuring mechanism.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112021006434.7T DE112021006434T5 (en) | 2020-12-14 | 2021-11-12 | BRAKE DUST MEASURING DEVICE AND BRAKE DUST MEASURING METHOD |
JP2022569779A JPWO2022130854A1 (en) | 2020-12-14 | 2021-11-12 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020206616 | 2020-12-14 | ||
JP2020-206616 | 2020-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022130854A1 true WO2022130854A1 (en) | 2022-06-23 |
Family
ID=82059707
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/041718 WO2022130854A1 (en) | 2020-12-14 | 2021-11-12 | Brake dust measurement device and brake dust measurement method |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPWO2022130854A1 (en) |
DE (1) | DE112021006434T5 (en) |
WO (1) | WO2022130854A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020166311A1 (en) * | 2001-05-09 | 2002-11-14 | Maricq Michel Matti | Brake dust collection assembly |
WO2019203281A1 (en) * | 2018-04-20 | 2019-10-24 | 曙ブレーキ工業株式会社 | Abrasive powder collection device, analysis system, abrasive powder collection method, and analysis method |
WO2019225591A1 (en) * | 2018-05-22 | 2019-11-28 | 株式会社堀場製作所 | Analysis system and analysis method |
JP2020046397A (en) * | 2018-09-21 | 2020-03-26 | 株式会社堀場製作所 | Brake testing system, brake testing method, and brake testing system program |
WO2020071510A1 (en) * | 2018-10-05 | 2020-04-09 | 曙ブレーキ工業株式会社 | Dust measurement device and dust measurement method |
JP2020520448A (en) * | 2017-05-02 | 2020-07-09 | ホリバ ヨーロッパ ゲーエムベーハー | Device for detecting and measuring brake dust |
-
2021
- 2021-11-12 JP JP2022569779A patent/JPWO2022130854A1/ja active Pending
- 2021-11-12 DE DE112021006434.7T patent/DE112021006434T5/en active Pending
- 2021-11-12 WO PCT/JP2021/041718 patent/WO2022130854A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20020166311A1 (en) * | 2001-05-09 | 2002-11-14 | Maricq Michel Matti | Brake dust collection assembly |
JP2020520448A (en) * | 2017-05-02 | 2020-07-09 | ホリバ ヨーロッパ ゲーエムベーハー | Device for detecting and measuring brake dust |
WO2019203281A1 (en) * | 2018-04-20 | 2019-10-24 | 曙ブレーキ工業株式会社 | Abrasive powder collection device, analysis system, abrasive powder collection method, and analysis method |
WO2019225591A1 (en) * | 2018-05-22 | 2019-11-28 | 株式会社堀場製作所 | Analysis system and analysis method |
JP2020046397A (en) * | 2018-09-21 | 2020-03-26 | 株式会社堀場製作所 | Brake testing system, brake testing method, and brake testing system program |
WO2020071510A1 (en) * | 2018-10-05 | 2020-04-09 | 曙ブレーキ工業株式会社 | Dust measurement device and dust measurement method |
Also Published As
Publication number | Publication date |
---|---|
JPWO2022130854A1 (en) | 2022-06-23 |
DE112021006434T5 (en) | 2023-11-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6720423B2 (en) | Device for detecting and measuring brake dust | |
US10428715B2 (en) | Exhaust gas analyzing system and pumping device | |
KR102002967B1 (en) | An exhaust gas continuous isokinetic sampling apparatus with a sectional area adjustment device attached to the suction nozzle | |
KR101881135B1 (en) | Dust sensor based on the light scattering | |
JP2006275983A (en) | Apparatus for testing filter | |
CN102590447A (en) | Method and equipment for calibrating dust-measuring instrument | |
US11408471B2 (en) | Wear debris collection device, analysis system, wear debris collection method, and analysis method | |
WO2022130854A1 (en) | Brake dust measurement device and brake dust measurement method | |
JPWO2019225443A1 (en) | Brake dust measurement system and brake dust measurement method | |
CN206832536U (en) | A kind of Apparatus for Dust Content in Stack | |
CN102221519B (en) | Direct-reading dust concentration detector | |
CN117705662B (en) | Method for calculating mass concentration of humidity-compensated particulate matter monitoring equipment | |
KR102146277B1 (en) | device for measuring dust by different particle size in chimney | |
WO2022130853A1 (en) | Brake dust measurement device, brake dust measurement method, and brake dust measurement program | |
CN114414449B (en) | Novel intelligent occupational health real-time detection device | |
CN112325952B (en) | Air flow measuring device flowing through rotary hole | |
KR102473058B1 (en) | Abrasion dust measurement system that measures abrasion dust in real and simulated driving | |
CN205538521U (en) | SCR denitration catalyst wearing and tearing strength character's test device | |
CN111257148B (en) | High-temperature solid particle erosion test device | |
CN111398101A (en) | System capable of measuring particulate matter | |
CN210221210U (en) | Vehicle-mounted sonic nozzle gas flow standard device | |
CN220019301U (en) | Standard substance transfer device of automatic monitoring equipment for particulate matters in ambient air | |
CN221007406U (en) | Ion concentration meter calibration device | |
CN210051669U (en) | Raise dust pollution on-line measuring device | |
CN216747281U (en) | Aerosol generating system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21906218 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022569779 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 112021006434 Country of ref document: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21906218 Country of ref document: EP Kind code of ref document: A1 |