Method and apparatus for measuring aerosol particles of exhaust gas
AssigneeDekati Oy
InventorsVille Niemelä, Leo Holma, Sami Lundahl, Tyler Beck
Life of this patent
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Abstract
A particle measuring apparatus includes a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow, a particle collecting unit to collect particles from the first partial flow by using a first filter, and a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles.
Claims18
A particle measuring apparatus, comprising:
- a distributor unit arranged to provide a first partial flow and a second partial flow by separating the second partial flow from an input flow,
- a particle collecting unit to collect particles from the first partial flow by using a first filter,
- a flow sensor to monitor the flow rate of the first partial flow,
- a pump to draw the second partial flow through the particle monitoring unit, and
- a particle monitoring unit to form charged particles by charging particles carried by the second partial flow, and to provide an electric current by collecting the charged particles,
- wherein the apparatus is arranged to start the second partial flow based on the flow rate of the first partial flow.
A method for measuring aerosol particles, the method comprising:
- providing a first partial flow and a second partial flow by separating the second partial flow from an input flow by using a distributor unit,
- starting the second partial flow based on the flow rate of the first partial flow,
- collecting particles from the first partial flow by using a first filter,
- forming charged particles by charging particles carried by the second partial flow, and
- providing an electric current by collecting the charged particles.
A method for measuring aerosol particles, the method comprising:
- providing a first partial flow and a second partial flow by separating the second partial flow from an input flow by using a distributor unit,
- stopping the second partial flow based on the flow rate of the first partial flow,
- collecting particles from the first partial flow by using a first filter,
- forming charged particles by charging particles carried by the second partial flow, and
- providing an electric current by collecting the charged particles.
Dependencies are inferred from the claim text.