Apparatus and method for measuring dust
First Claim
1. An apparatus for measuring dust, comprising:
- a flow channel unit for defining a flow channel allowing a fluid containing dust to move through;
a light emitter for emitting light into the flow channel;
a light detector for detecting light scattered from the dust in the flow channel and converting the detected light scattered from the dust in the flow channel into an electrical detection signal, the light detector comprising a plurality of detectors having different light detection ranges; and
a controller for controlling the flow channel unit, the light emitter and the light detector,wherein the controller is configured to;
receive detection signals from the plurality of detectors;
compensate for an offset for the received detection signals; and
measure a dust concentration based on the compensated detection signals,wherein, when the controller compensates for the offset for the received detection signals, the controller is further configured to;
divide the detection signals into a low-concentration section, a discontinuous section and a high-concentration section according to dust concentrations;
apply, in the low-concentration section, a first detection signal received from a detector having a first light detection range;
apply, in the high-concentration section, a second detection signal received from a detector having a second light detection range, the second light detection range being narrower than the first light detection range; and
apply a third detection signal in the discontinuous section, the third detection signal being obtained by increasing a weight of the first detection signal and decreasing a weight of the second detection signal as a concentration point moves toward the low-concentration section and by decreasing the weight of the first detection signal and increasing the weight of the second detection signal as the concentration point moves toward the high-concentration section.
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Accused Products
Abstract
Disclosed herein is a dust measuring apparatus and method for measuring a dust concentration in a flow channel. The apparatus includes a flow channel unit for defining a flow channel allowing a fluid containing dust to move therethrough, a light emitter for emitting light into the flow channel, a light detector for detecting light scattered from the dust in the flow channel and converting it to an electrical detection signal, the light detector including a plurality of detectors having different light detection ranges, and a controller for controlling the flow channel unit, the light emitter and the light detector, wherein the controller is configured to receive detection signals from the detectors, compensate for an offset for the received detection signals, and measure a dust concentration based on the compensated detection signals.
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Citations
18 Claims
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1. An apparatus for measuring dust, comprising:
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a flow channel unit for defining a flow channel allowing a fluid containing dust to move through; a light emitter for emitting light into the flow channel; a light detector for detecting light scattered from the dust in the flow channel and converting the detected light scattered from the dust in the flow channel into an electrical detection signal, the light detector comprising a plurality of detectors having different light detection ranges; and a controller for controlling the flow channel unit, the light emitter and the light detector, wherein the controller is configured to; receive detection signals from the plurality of detectors; compensate for an offset for the received detection signals; and measure a dust concentration based on the compensated detection signals, wherein, when the controller compensates for the offset for the received detection signals, the controller is further configured to; divide the detection signals into a low-concentration section, a discontinuous section and a high-concentration section according to dust concentrations; apply, in the low-concentration section, a first detection signal received from a detector having a first light detection range; apply, in the high-concentration section, a second detection signal received from a detector having a second light detection range, the second light detection range being narrower than the first light detection range; and apply a third detection signal in the discontinuous section, the third detection signal being obtained by increasing a weight of the first detection signal and decreasing a weight of the second detection signal as a concentration point moves toward the low-concentration section and by decreasing the weight of the first detection signal and increasing the weight of the second detection signal as the concentration point moves toward the high-concentration section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for measuring dust in an apparatus for measuring the dust comprising a plurality of detectors having different light detection ranges, the method comprising:
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receiving detection signals from the detectors; compensating for an offset for the received detection signals; and measuring a dust concentration based on the compensated detection signals wherein the compensating for the offset comprises; dividing the detection signals into a low-concentration section, a discontinuous section and a high-concentration section according to dust concentrations, and compensating for the offset of the detection signals by; applying, in the low-concentration section, a first detection signal received from a detector having a first light detection range; applying, in the high-concentration section, a second detection signal received from a detector having a second light detection range, the second light detection range being narrower than the first light detection range; and applying a third detection signal in the discontinuous section, the third detection signal being obtained by differently adjusting a weight of the first detection signal according to sub-sections of the discontinuous section. - View Dependent Claims (16, 17, 18)
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Specification