Fine dust mass measurement device and operating method thereof
AssigneesSamsung Electronics Co., Ltd., Research & Business Foundation Sungkyunkwan University
InventorsIlhwan Kim, Changhyeon Kim, Kangyoon Lee
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Abstract
A dust mass measurement device includes a sensing channel configured to generate a sensing clock signal, a reference channel configured to generate a reference clock signal, a counter configured to generate a first output signal based on the sensing clock signal, and generate a second output signal based on the reference clock signal, and a controller configured to calculate a frequency difference between the sensing clock signal and the reference clock signal based on a difference value between the first output signal and the second output signal, which are received from the counter, and measure a mass of dust based on the calculated frequency difference.
Claims20
A dust mass measurement device comprising:
- a sensing channel configured to generate a sensing clock signal, the sensing channel comprising a first surface acoustic wave sensor configured to generate a surface acoustic wave and a first amplifier configured to amplify the surface acoustic wave generated by the first surface acoustic wave sensor;
- a reference channel configured to generate a reference clock signal, the reference channel comprising a second surface acoustic wave sensor configured to generate a surface acoustic wave and a second amplifier configured to amplify the surface acoustic wave generated by the second surface acoustic wave sensor;
- a counter electrically connected to the sensing channel and the reference channel and configured to generate a first output signal based on the sensing clock signal, and generate a second output signal based on the reference clock signal;
- and
- a controller electrically connected to the counter and configured to:
- calculate a frequency difference between the sensing clock signal and the reference clock signal based on a difference value between the first output signal and the second output signal;
- and
- measure a mass of particulate matter based on the frequency difference between the sensing clock signal and the reference clock signal.
An operating method of a dust mass measurement device, the operating method comprising:
- generating a sensing clock signal through a sensing channel, the sensing channel including a first surface acoustic wave sensor configured to generate a surface acoustic wave and a first amplifier configured to amplify the surface acoustic wave generated by the first surface acoustic wave sensor;
- generating a reference clock signal through a reference channel, the reference channel including a second surface acoustic wave sensor configured to generate a surface acoustic wave and a second amplifier configured to amplify the surface acoustic wave generated by the second surface acoustic wave sensor;
- generating a first output signal through an asynchronous counter based on the sensing clock signal;
- generating a second output signal through the asynchronous counter based on the reference clock signal;
- calculating a frequency difference between the sensing clock signal and the reference clock signal through a controller based on a difference value between the first output signal and the second output signal;
- and
- measuring a mass of particulate matter through the controller based on the frequency difference between the sensing clock signal and the reference clock signal.
Dependencies are inferred from the claim text.