WO2022130854A1 - Brake dust measurement device and brake dust measurement method - Google Patents

Brake dust measurement device and brake dust measurement method Download PDF

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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
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WIPO (PCT)
Prior art keywords
brake
flow path
brake dust
sampling
main flow
Prior art date
Application number
PCT/JP2021/041718
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French (fr)
Japanese (ja)
Inventor
喜則 大槻
ジョエル ダンツァー
ドミトロ ルガビィ
Original Assignee
株式会社堀場製作所
ホリバ ヨーロッパ ゲーエムベーハー
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Application filed by 株式会社堀場製作所, ホリバ ヨーロッパ ゲーエムベーハー filed Critical 株式会社堀場製作所
Priority to JP2022569779A priority Critical patent/JPWO2022130854A1/ja
Priority to DE112021006434.7T priority patent/DE112021006434T5/en
Publication of WO2022130854A1 publication Critical patent/WO2022130854A1/en

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    • 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.

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Abstract

A brake dust measurement device (100) for measuring brake dust generated from a brake (Z) is provided with: a chamber (10) that houses the brake (Z); a supply duct (11) that is connected to the chamber (10) and supplies gas through a supply port (O1) to the brake (Z); a discharge duct (12) that is connected to the chamber (10) and discharges, together with gas, brake dust flowing into a discharge port (O2); and a measurement mechanism that collects and measures the brake dust flowing through the discharge duct (12). The brake (Z) is disposed vertically below the supply port (O1), and the discharge port (O2) is disposed vertically below the brake (Z). The minimum diameter of the supply duct (11) is less than the maximum diameter of the chamber (10). A brake pad (Z1) constituting the brake (Z) is located within the supply port (O1) when viewed in the vertical direction.

Description

ブレーキダスト測定装置及びブレーキダスト測定方法Brake dust measuring device and brake dust measuring method
　本発明は、ブレーキダスト測定装置及びブレーキダスト測定方法に関するものである。 The present invention relates to a brake dust measuring device and a brake dust measuring method.
　従来のブレーキダスト測定装置としては、特許文献１に示すように、チャンバ内にセットしたブレーキに空気を当てながら該ブレーキを動作させ、この際に発生したブレーキダストを採取して例えばその量などを測定するものがある。このように、ブレーキをチャンバに収容させることにより、室内に存在する浮遊粒子によるバックグラウンドの影響を低減させることができる。 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.
　具体的にこの特許文献１の装置は、チャンバの側方に送風機を設置し、この送風機からチャンバ内に送風するものであるが、このように側方から送風する構成であると、ブレーキダストと空気とが混ざり合う前にブレーキダストがチャンバの底面に落ちてしまい、測定誤差を引き起こす場合があった。また、送風機をチャンバの側方の近傍に設置する必要があるため、その設置スペースを確保するべく、装置の設置場所にも制約が課される。 Specifically, in the device of Patent Document 1, 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. In addition, since it is necessary to install the blower in the vicinity of the side of the chamber, restrictions are imposed on the installation location of the device in order to secure the installation space.
　これに対して、上方から空気をチャンバ内に送り込むものとしては、特許文献２に示す装置が知られている。 On the other hand, the device shown in Patent Document 2 is known as a device for sending air into the chamber from above.
　しかしながら、このように上方から空気を送り込むようにしても、ブレーキに当てる気流が乱れたり、ブレーキ周辺における流速が不均一になると、発生したブレーキダストが周囲に飛散してチャンバ内に残存してしまい、ブレーキダストの排出総量や濃度等を正しく計測することができなかった。なお、特許文献２においては、ブレーキに空気を当てる主目的がブレーキの冷却であり、乱れのない気流をブレーキに当てるための具体的な構成については何ら検討されていない。 However, even if air is sent from above in this way, if the airflow applied to the brake is disturbed or the flow velocity around the brake becomes uneven, the generated brake dust will scatter around and remain in the chamber. , The total amount and concentration of brake dust could not be measured correctly. In 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.
特開２０１９－１９０９０１号公報Japanese Unexamined Patent Publication No. 2019-190901 特表２０２０－５２０４４８号公報Special Table 2020-520448
　そこで、本発明は、乱れのない気流をブレーキに当てられるようにしてブレーキダストの損失を抑え、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ることをその主たる課題とするものである。 Therefore, 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.
　すなわち本発明に係るブレーキダスト測定装置は、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ことを特徴とするものである。 That is, the brake dust measuring device according to the present invention 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.
　このように構成されたブレーキダスト測定装置によれば、供給口、ブレーキ、及び排出口が鉛直方向に沿って配置されており、しかもブレーキダストの主たる発生箇所であるブレーキパッドが、鉛直方向から視て供給口の内側に収まっているので、ブレーキ周辺の流速を均一（一定）にすることができ、可及的に乱れのない気流をブレーキに当てることができる。これにより、発生したブレーキダストの損失を抑えることができ、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 dust measuring device configured in this way, 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.
　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％以上であることが好ましい。
　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.
　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ことが好ましい。
　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.
　より具体的な態様としては、前記テーパ部の拡がり角度が２７０°未満である態様を挙げることができる。 As a more specific embodiment, an embodiment in which the expansion angle of the tapered portion is less than 270 ° can be mentioned.
　また、前記供給口のより具体的な態様としては、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以上である態様を挙げることができる。
　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.
　種々のサイズのブレーキに対応できる測定装置とするためには、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ことが好ましい。
　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.
　より具体的には、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ことが好ましい。 More specifically, it is preferable that 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ことが好ましい。
　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.
　上述した作用効果をより顕著に発揮させるためには、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ことが好ましい。 In order to exert the above-mentioned action and effect more remarkably, it is preferable that 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.
　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ことが好ましい。
　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.
　また、サンプリング流量をメイン流量により精度良く比例させるための別の態様としては、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態様を挙げることができる。 Further, as another embodiment for accurately proportionalizing the sampling flow rate to the main flow rate, 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 sampling flow path for collecting a part of the sample gas, a main flow meter provided on the downstream side of the sampling point in the main flow path, a sampling flow meter provided in the sampling flow path, and the main flow rate. 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.
　また、本発明に係るブレーキダスト測定方法は、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ことを特徴とする方法である。
　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.
　このように構成した本発明によれば、ブレーキ周辺の流速が均一になり、可及的に乱れのない気流をブレーキに当てることができ、発生したブレーキダストの損失を抑えることが可能となり、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 present invention configured in this way, 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.
本発明の一実施形態に係るブレーキダスト測定装置の全体構成を示す模式図。The schematic diagram which shows the whole structure of the brake dust measuring apparatus which concerns on one Embodiment of this invention. 同実施形態のチャンバ周辺の構成を示す模式図。The schematic diagram which shows the structure around the chamber of the same embodiment. 同実施形態の供給ダクトの供給口とブレーキパッドとの位置関係を示す模式図。The schematic diagram which shows the positional relationship between the supply port of the supply duct of the same embodiment, and the brake pad. 同実施形態のブレーキダスト測定方法を示すフローチャート図。The flowchart which shows the brake dust measurement method of the same embodiment. その他の実施形態におけるチャンバ周辺の構成を示す模式図。The schematic diagram which shows the structure around a chamber in another embodiment. その他の実施形態におけるチャンバ周辺の構成を示す模式図。The schematic diagram which shows the structure around a chamber in another embodiment. その他の実施形態におけるアダプタの構成を示す模式図。The schematic diagram which shows the structure of the adapter in other embodiments. その他の実施形態におけるブレーキダスト測定装置の全体構成を示す模式図。The schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments. その他の実施形態におけるブレーキダスト測定装置の全体構成を示す模式図。The schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments. その他の実施形態におけるブレーキダスト測定装置の全体構成を示す模式図。The schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments. その他の実施形態におけるブレーキダスト測定装置の全体構成を示す模式図。The schematic diagram which shows the whole structure of the brake dust measuring apparatus in other embodiments.
１００・・・ブレーキダスト測定装置
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 ・ ・ ・ Shaft member 10 ・ ・ ・ Chamber 11 ・ ・ ・ Supply duct O1 ・ ・ ・ Supply port 12 ・・ ・ Discharge duct O2 ・ ・ ・ Discharge port 20 ・ ・ ・ Measurement mechanism D1 ・ ・ ・ Supply port diameter D2 ・ ・ ・ Brake disc diameter 112 ・ ・ ・ Tapered part θ ・ ・ ・ Expansion angle
　本実施形態に係るブレーキダスト測定装置１００は、図１に示すように、ブレーキＺを動作させることにより発生するブレーキダストの例えば量を測定して、そのブレーキＺの性能を試験するためのものであり、ここではブレーキＺ単体をブレーキダイナモＤに接続して動作するように構成されている。
　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 dust measuring device 100 according to the present embodiment is for measuring, for example, the amount of brake dust generated by operating the brake Z and testing the performance of the brake Z. Here, 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.
　具体的にこのブレーキダスト測定装置１００は、図１に示すように、ブレーキダイナモＤに接続された供試体たるブレーキＺを収容するチャンバ１０と、チャンバ１０内で動作するブレーキＺにガスを供給する供給流路Ｌ１と、そのガスとともにブレーキＺから発生したブレーキダストが流れるメイン流路Ｌ２と、メイン流路Ｌ２を流れるブレーキダストを採取して測定する測定機構２０とを備えている。 Specifically, as shown in FIG. 1, 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.
　チャンバ１０は、内部空間がブレーキＺを収容するための収容空間１０ｓとして形成されており、例えば筒状のものである。 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.
　供給流路Ｌ１は、図１及び図２に示すように、チャンバ１０の上壁（壁面）の一部に接続された供給ダクト１１により形成されている。この供給ダクト１１は、チャンバ１０内に連通する供給口Ｏ１を有し、この供給口Ｏ１を介して例えば空気等のガスをチャンバ１０内に供給するものである。ここで、供給ダクト１１の最小の径は、チャンバ１０の最大の径よりも小さく、具体的にこの供給ダクト１１は、チャンバ１０の収容空間１０ｓの径（すなわち、チャンバ１０の内径）よりも細い配管である。つまり、鉛直方向から視た供給ダクト１１の最小の径寸法が、鉛直方向から視たチャンバ１０の最大の径寸法よりも小さい。これにより、供給された空気は、動作中のブレーキＺに当たる。なお、ブレーキＺに当てるガスは必ずしも空気に限るものではなく、適宜変更して構わない。また、供給流路Ｌ１には、図１に示すように、例えば曲がり箇所に空気を整流するための１又は複数の整流板Ｘ１が設けられていても良い。 As shown in FIGS. 1 and 2, 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. Here, 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.
　メイン流路Ｌ２は、図１及び図２に示すように、チャンバ１０の底壁に接続された排出ダクト１２により形成されている。この排出ダクト１２は、チャンバ１０内に連通する排出口Ｏ２を有し、この排出口Ｏ２に流れ込むブレーキダストを空気とともにチャンバ１０から排出するものである。これにより、排出されたブレーキダストを含む空気はサンプルガスとしてメイン流路Ｌ２を流れることになる。また、メイン流路Ｌ２には、図１に示すように、例えば曲がり箇所にサンプルガスを整流するための１又は複数の整流板Ｘ２が設けられていても良い。 As shown in FIGS. 1 and 2, 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. As a result, the discharged air containing the brake dust flows through the main flow path L2 as a sample gas. Further, as shown in FIG. 1, 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.
　測定機構２０は、メイン流路Ｌ２を流れるサンプルガスの一部を採取して、その採取されたサンプルガスに含まれるブレーキダストを測定するものであり、具体的には、メイン流路Ｌ２からサンプリングガスの一部を採取するサンプリング流路Ｌ３と、サンプリング流路Ｌ３に設けられて、サンプルガス中のブレーキダストを捕集する捕集部たる捕集フィルタＦとを備える。 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.
　この実施形態の測定機構２０は、サンプルガスを比例サンプリングするように構成されている。具体的に測定機構２０は、チャンバ１０からメイン流路Ｌ２に引き込むサンプルガスの流量（以下、メイン流量という）を調整するためのメイン流量調整部Ｐ１と、メイン流路Ｌ２からサンプリング流路Ｌ３に引き込むサンプルガスの流量（以下、サンプリング流量という）を調整するためのサンプリング流量調整部Ｐ２とを備えている。なお、メイン流量調整部Ｐ１やサンプリング流量調整部Ｐ２としては、例えばブロワやポンプやマスフローコントローラなどを挙げることができる。 The measuring mechanism 20 of this embodiment is configured to proportionally sample the sample gas. Specifically, 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). Examples of 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.
　そして、この測定機構２０は、メイン流量に対するサンプリング流量の比率が所定の分流比となるように、サンプリング流量調整部Ｐ２たるサンプリングポンプの例えば回転数等を制御するように構成されている。なお、ここでのメイン流量及びサンプリング流量は質量流量である。 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.
　上述した構成により、例えば捕集後の捕集フィルタＦの重さから捕集前の捕集フィルタＦの重さを差し引くことで、捕集フィルタＦに捕集されたブレーキダスト量を得ることができる。また、測定機構２０としては、このブレーキダスト量に、メイン流量とサンプリング流量との分流比を乗じることでブレーキダストの総量を算出するブレーキダスト量算出部としての機能を備えていても良い。 With the above configuration, for example, by subtracting the weight of the collection filter F before collection from the weight of the collection filter F after collection, the amount of brake dust collected by the collection filter F can be obtained. can. Further, 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.
　然して、本実施形態のブレーキダスト測定装置１００は、図２及び図３に示すように、上述した供給ダクト１１の供給口Ｏ１、チャンバ１０内のブレーキＺ、及び、排出ダクト１２の排出口Ｏ２が鉛直方向に沿って配置されている。 Therefore, in the brake dust measuring device 100 of the present embodiment, as shown in FIGS. 2 and 3, 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.
　より具体的に説明すると、図２に示すように、このブレーキダスト測定装置１００において、供給口Ｏ１の鉛直下方にブレーキＺが配置されるとともに、このブレーキＺの鉛直下方に排出口Ｏ２が配置されている。言い換えれば、供給口Ｏ１及び排出口Ｏ２は鉛直方向において対向配置されており、これらの供給口Ｏ１及び排出口Ｏ２の間にブレーキＺが保持される。 More specifically, as shown in FIG. 2, in the brake dust measuring device 100, the brake Z is arranged vertically below the supply port O1 and the discharge port O2 is arranged vertically below the brake Z. ing. In other words, 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.
　なお、ここでのブレーキダスト測定装置１００は、図３に示すように、ブレーキＺが取り付けられ、そのブレーキＺをチャンバ１０内において、供給口Ｏ１の鉛直下方に保持する取付け治具３０を備えている。 As shown in FIG. 3, 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.
　ブレーキＺがこのように配置された状態において、図３に示すように、このブレーキＺを構成するブレーキパッドＺ１は、鉛直方向から視て供給口Ｏ１の内側に収まるように配置されており、ここでは一対のブレーキパッドＺ１それぞれが、鉛直方向から視て供給口Ｏ１及び排出口Ｏ２の双方の内側に収まるように配置されている。なお、この実施形態では、供給口Ｏ１よりも排出口Ｏ２の方が大きい態様を示してあるが、供給口Ｏ１よりも排出口Ｏ２の方が小さくても良いし、これらが互いに等しい大きさであっても良い。 In the state where the brake Z is arranged in this way, as shown in FIG. 3, 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. In this embodiment, 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.
　また、この配置において、図２に示すように、ブレーキＺを構成するブレーキディスクＺ２の軸部材Ｚ３の高さ位置Ｚｈが、チャンバ１０の中心の高さ位置１０ｈよりも上方にある。すなわち、本実施形態の取付け治具３０は、ブレーキディスクＺ２の軸部材Ｚ３の高さ位置Ｚｈがチャンバ１０の中心の高さ位置１０ｈよりも上方になるように、ブレーキＺを保持するものである。この配置において、ブレーキディスクＺ２の軸部材Ｚ３は、図３に示すように、鉛直方向から視て、供給口Ｏ１及び排出口Ｏ２の内側に収まっている。ただし、ブレーキディスクＺ２の軸部材Ｚ３は、必ずしもチャンバ１０の中心の高さ位置１０ｈよりも上方にある必要はなく、この高さ位置１０ｈよりも下方に位置していても良い。 Further, in this arrangement, as shown in FIG. 2, 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. .. In this arrangement, as shown in FIG. 3, 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. However, 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.
　ここで、本実施形態の供給ダクト１１は円筒状をなし、その供給口Ｏ１は円形状である。そして、図２に示すように、この供給口Ｏ１の直径Ｄ１は、ブレーキディスクＺ２の直径Ｄ２の７０％以上であり、ここではブレーキディスクＺ２の直径Ｄ２よりも大きく、具体的には３００ｍｍ以上である。 Here, the supply duct 11 of the present embodiment has a cylindrical shape, and the supply port O1 thereof has a circular shape. As shown in FIG. 2, 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.
　さらに、本実施形態の供給ダクト１１は、図２に示すように、その下流側端部が供給口Ｏ１に向かって徐々に拡がるテーパ状をなす。具体的には、この実施形態における供給ダクト１１は、鉛直方向に沿って延びる直管部１１１と、直管部１１１から供給口Ｏ１に向かって徐々に拡がるテーパ部１１２とを備えている。そして、テーパ部１１２は、その拡がり角度θが２７０°未満である。なお、ここでいう拡がり角度とは、直管部１１１の内周面１１１ａとテーパ部１１２の内周面１１２ａとのなす角度である。 Further, as shown in FIG. 2, 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. Specifically, 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 θ 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.
　次に、本実施形態のブレーキダスト測定装置１００によるブレーキダスト測定方法について、図４にフローチャートを参照しながら説明する。 Next, the brake dust measuring method by the brake dust measuring device 100 of the present embodiment will be described with reference to the flowchart in FIG.
　まず、ブレーキＺをチャンバ１０内に配置させる。具体的には、ブレーキＺを取付け治具３０に取り付けて、ブレーキＺを構成するブレーキパッドＺ１を、その全体が鉛直方向から視て供給口Ｏ１の内側に収まるように配置する（Ｓ１）。この際、本実施形態では、ブレーキパッドＺ１の全体が、鉛直方向から視て排出口Ｏ２の内側にも収まるようにする。また、本実施形態では、ブレーキディスクＺ２の軸部材Ｚ３が、鉛直方向から視て供給口Ｏ１及び排出口Ｏ２の内側に収まるように配置されている。 First, 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.
　次に、チャンバ１０内でブレーキＺを動作させながら、このブレーキＺに供給流路Ｌ１から空気を供給し、メイン流量調整部Ｐ１を稼働させることにより、ブレーキＺから発生したブレーキダストを含むサンプルガスをメイン流路Ｌ２に流す（Ｓ２）。 Next, while operating the brake Z in the chamber 10, air is supplied to the brake Z from the supply flow path L1 to operate the main flow rate adjusting unit P1, so that the sample gas containing the brake dust generated from the brake Z is operated. Is flowed through the main flow path L2 (S2).
　そして、メイン流路Ｌ２を流れるサンプルガスの一部をサンプリング流路Ｌ３に採取する（Ｓ３）。これにより、サンプルガスに含まれるブレーキダストが捕集フィルタＦにより捕集される。 Then, a part of the sample gas flowing through the main flow path L2 is collected in the sampling flow path L3 (S3). As a result, the brake dust contained in the sample gas is collected by the collection filter F.
　その後、例えば、捕集フィルタＦにより捕集されたブレーキダスト量や、そのブレーキダスト量から例えば１回の試験におけるブレーキダストの総質量、或いは、単位走行距離当たりのブレーキダストの質量などを算出する（Ｓ４）。 After that, for example, 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).
　このように構成されたブレーキダスト測定装置１００によれば、供給ダクト１１の供給口Ｏ１、ブレーキＺ、及び、排出ダクト１２の排出口Ｏ２が鉛直方向に沿って配置されており、しかもブレーキダストの主たる発生箇所であるブレーキパッドＺ１が、鉛直方向から視て供給口Ｏ１の内側に収まっているので、ブレーキＺ周辺の流速を均一（一定）にすることができ、可及的に乱れのない気流をブレーキＺに当てることができる。これにより、発生したブレーキダストの損失を抑えることができ、測定誤差の低減並びに測定精度の向上を図れる。
　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 dust measuring device 100 configured in this way, 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.
　また、供給口Ｏ１の直径Ｄ１が、ブレーキＺを構成するブレーキディスクＺ２の直径Ｄ２の７０％以上であるので、ブレーキディスクＺ２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１０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。 Further, since 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.
　さらに、供給ダクト１１が供給口Ｏ１に向かって徐々に拡がるテーパ部１１２を有するので、乱れのない風をブレーキＺ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１０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１０から排出させることができる。 Further, since 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.
　そのうえ、ブレーキＺを構成するブレーキディスクＺ２の軸部材Ｚ３の高さ位置Ｚｈが、チャンバ１０の中心の高さ位置１０ｈよりも上方であるので、ブレーキディスクＺ２の軸部材Ｄ３が、排出口Ｏ２よりも供給口Ｏ１に近く、勢いを保ったまま風をブレーキパッドＺ１やブレーキディスクＺ２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１０から排出することができる。 Moreover, since the height position Zh of the shaft member Z3 of the brake disc Z2 constituting the brake Z is above the height position 10h of the center of 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.
　なお、本発明は前記実施形態に限られるものではない。 The present invention is not limited to the above embodiment.
　例えば、前記実施形態の供給ダクト１１は、チャンバ１０の上壁に接続されていたが、図５に示すように、供給ダクト１１がチャンバ１０の上壁を貫通し、供給口Ｏ１がチャンバ１０の内部に配置されていても良い。 For example, 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.
　また、前記実施形態の供給ダクト１１は、下流側端部がテーパ状をなすテーパ部１１２が供給口Ｏ１に向かって延びていたが、図６に示すように、供給ダクト１１は、必ずしもテーパ部１１２を備えている必要はなく、直管部１１１が供給口Ｏ１まで延びていても良い。 Further, in the supply duct 11 of the above embodiment, 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.
　そのうえ、前記実施形態では、ブレーキパッドＺ１のみならず、ブレーキディスクＺ２の軸部材Ｚ３もが、鉛直方向から視て供給口Ｏ１の内側に収まるように配置されていたが、本発明に係るブレーキダスト測定装置１００としては、図６に示すように、少なくともブレーキパッドＺ１が鉛直方向から視て供給口Ｏ１の内側に収まるように配置されていれば良い。 Moreover, in the above-described embodiment, not only the brake pad Z1 but also the shaft member Z3 of the brake disc Z2 is arranged so as to be contained inside the supply port O1 when viewed from the vertical direction. However, the brake dust according to the present invention. As shown in FIG. 6, 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.
　さらに、ブレーキダスト測定装置１００としては、図７に示すように、供給口Ｏ１の大きさを変更可能な複数のアダプタ１１３を備えていても良い。具体的にこれらのアダプタ１１３は、供給ダクト１１を構成するものであり、例えば直管部１１１に対して着脱可能なものである。このようなアダプタとしては、供給口Ｏ１の直径を例えば８０ｍｍ以上２００ｍｍ以下の範囲で変更可能なものが挙げられる。
　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 dust measuring device 100 may include a plurality of adapters 113 capable of changing the size of the supply port O1. Specifically, 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.
　そのうえ、前記実施形態では、供給ダクト１１が円筒状のものであり、供給口Ｏ１が円形状をなす態様を説明したが、供給ダクト１１は断面が例えば四角形などの多角形状をなす筒状のものであっても良い。この場合、供給口Ｏ１も多角形状をなし、その外接円の直径が３００ｍｍ以上であっても良い。 Moreover, in the above-described embodiment, the supply duct 11 has a cylindrical shape and the supply port O1 has a circular shape. However, the supply duct 11 has a cylindrical shape having a polygonal cross section such as a quadrangle. It may be. In this case, the supply port O1 may also have a polygonal shape, and the diameter of the circumscribed circle thereof may be 300 mm or more.
　さらに、前記実施形態では、測定機構２０がサンプルガスを比例サンプリングする態様について簡単に述べたが、かかる構成をより詳細に説明すると、ブレーキダスト測定装置１００としては、図８に示すように、メイン流路Ｌ２に設けられたメイン流量計ＦＭ１と、サンプリング流路Ｌ３に設けられたサンプリング流量計ＦＭ２とをさらに備えていても良い。 Further, in the above-described embodiment, the mode in which the measuring mechanism 20 proportionally samples the sample gas has been briefly described. However, if such a configuration is described in more detail, 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.
　メイン流量計ＦＭ１は、図８においては、メイン流路Ｌ１におけるサンプリング流路Ｌ２の接続箇所であるサンプリングポイントＸの下流側に設けられているが、サンプリングポイントＸの上流側に設けられていても良い。
　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.
　そして、このブレーキダスト測定装置１００は、図８に示すように、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が、メイン流量計ＦＭ１により計測されたメイン流量に比例した流量となるように、メイン流量調整部Ｐ１及びサンプリング流量調整部Ｐ２の一方又は両方を制御する制御装置Ｃを備えていても良い。
　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 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.
　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。 With such a configuration, 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.
　また、本発明のブレーキダスト測定装置１００としては、図９に示すように、サンプリング流路Ｌ３の下流側端部が、メイン流路Ｌ２におけるサンプリングポイントの下流に接続されており、サンプリング流路Ｌ３に採取したサンプルガスをメイン流路Ｌ２に戻すように構成されていても良い。
　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 dust measuring device 100 of the present invention, as shown in FIG. 9, 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.
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.
　なお、サンプリング流量をメイン流量により精度良く比例させるための別の態様としては、制御装置２０Ｃが、メイン流量計ＦＭ１により計測されたメイン流量を、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により補正する態様を挙げる。
　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.
　また、ブレーキダスト測定装置１００としては、捕集フィルタＦの代わり或いは捕集フィルタＦに加えてサンプルガスを採集するサンプリングバッグを備え、採取されたサンプルガスに含まれる種々の成分を測定するものであってもよい。なお、測定対象成分としては、ブレーキダスト由来のハイドロカーボン等の成分、及び／又は、排ガスに含まれる成分を挙げることができる。
　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 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. There may be. Examples of the component to be measured include a component such as hydrocarbon derived from brake dust and / or a component contained in the exhaust gas.
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.
　さらに、本発明に係るブレーキダスト測定装置１００としては、図１１に示すように、空気がチャンバ１０内を横方向（又は略水平方向）に流れるように構成されていても良いし、図示していないが、空気がチャンバ１０内を横方向又は上下方向それぞれに対して傾斜した斜め方向に流れるように構成されていても良い。
　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 dust measuring device 100 according to the present invention may be configured to allow air to flow laterally (or substantially horizontally) in the chamber 10, and is shown in the figure. However, 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.
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 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.
　さらに加えて、前記実施形態では捕集フィルタＦに捕集されたブレーキダスト量を算出するブレーキダスト量算出部について述べたが、捕集フィルタＦの代わりに或いは捕集フィルタＦに加えて、ダストの捕集部及び分析部として機能を発揮するＤＣＳ（Diffusion Changer Sensor）をサンプリング流路Ｌ３設置し、ブレーキダストの捕集及び分析が例えば同時に行われるようにしてもよい。また、同様に捕集フィルタＦの代わり或いは捕集フィルタＦに加えて、ダストの捕集部及び分析部としての機能を発揮するようＰＮ（Particle Number）計測器をサンプリング流路Ｌ３に設けても良い。
　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.
　その他、本発明は前記実施形態に限られず、その趣旨を逸脱しない範囲で種々の変形が可能であるのは言うまでもない。 In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.
　このように構成した本発明によれば、ブレーキ周辺の流速が均一になり、可及的に乱れのない気流をブレーキに当てることができ、発生したブレーキダストの損失を抑えることが可能となり、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 present invention configured in this way, 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.

Claims (12)

  1. 　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.
  2. 　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.
  3. 　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.
  4. 　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 °.
  5. 　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.
  6. 　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.
  7. 　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.
  8. 　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.
  9. 　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.
  10. 　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.
  11. 　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.
  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.
PCT/JP2021/041718 2020-12-14 2021-11-12 Brake dust measurement device and brake dust measurement method WO2022130854A1 (en)

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