Collection-amount detection method for particulate matters and collection-amount detection apparatus therefor and exhaust-gas converting apparatus
First Claim
1. A collection-amount detection method for particulate matters, the collection-amount detection method being a collection-amount estimation method for estimating a collection amount of particulate matters, which have been collected in a collector container, by putting the collector container in place in a flow passage in which gases including the particulate matters distribute, and including:
- an emission step of emitting electromagnetic waves whose wave length is millimeter wave length or submillimeter wave length onto the collector container from the outside of the collector container; and
a detection step of detecting an intensity of the electromagnetic waves that have transmitted through the collector container, and then substituting the intensity into a relational expression between intensity and collection amount that have been determined in advance, thereby computing a collection amount of the particulate matters.
1 Assignment
0 Petitions
Accused Products
Abstract
A filter 2 for collecting PMs, a microwave transmitter 30 for emitting electromagnetic waves whose frequency is dozens of GHz-a few of THz onto the filter 2, a microwave receiver 31 for detecting an intensity of the electromagnetic waves that have transmitted through the filter 2, and a computing means for computing a collection amount of PMs from the intensity that has been detected with the microwave receiver 31 are included. Since it is possible to detect the distribution of the collection amount of PMs with good accuracy, it is possible to carry out a recycling process in a state where the collection amount does not become too much, and thereby it is possible to make a reducing-agent supply amount into exhaust gases minimum at the time of the recycling process.
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Citations
10 Claims
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1. A collection-amount detection method for particulate matters, the collection-amount detection method being a collection-amount estimation method for estimating a collection amount of particulate matters, which have been collected in a collector container, by putting the collector container in place in a flow passage in which gases including the particulate matters distribute, and including:
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an emission step of emitting electromagnetic waves whose wave length is millimeter wave length or submillimeter wave length onto the collector container from the outside of the collector container; and a detection step of detecting an intensity of the electromagnetic waves that have transmitted through the collector container, and then substituting the intensity into a relational expression between intensity and collection amount that have been determined in advance, thereby computing a collection amount of the particulate matters.
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2. A collection-amount detection apparatus for particulate matters, including:
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a collector container being put in place in a flow passage in which gases including particulate matters distribute; an electromagnetic-wave emitting means for emitting electromagnetic waves whose wave length is millimeter wave length or submillimeter wave length onto the collector container from the outside of the collector container; an electromagnetic-wave receiving means for detecting an intensity of the electromagnetic waves that have transmitted through the collector container; and a computing means for computing a collection amount of the particulate matters from the intensity that has been detected with the electromagnetic-wave receiving means.
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3. An exhaust-gas converting apparatus including:
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a filter being put in place in an exhaust-gas flow passage, and being for collecting particulate matters in which carbon makes the majority; an accommodator container for accommodating the filter therein; an electromagnetic-wave emitting means for emitting electromagnetic waves whose wave length is millimeter wave length or submillimeter wave length onto the filter through an incident window that is formed in the accommodator container; an electromagnetic-wave receiving means for detecting an intensity of the electromagnetic waves that have transmitted through the filter and have then radiated through a radiation window that is formed in the accommodator container; and a computing means for computing a collection amount of particulate matters from the intensity that has been detected with the electromagnetic-wave receiving means. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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Specification