KR20160090723A - Black carbon measuring apparatus - Google Patents

Abstract

A black carbon measuring device is disclosed. A light emitting element for emitting ultraviolet rays, a detector for detecting ultraviolet rays passing through the filter, and a processor for calculating the concentration of black carbon by measuring the detected ultraviolet rays. Therefore, the black carbon concentration in the air can be measured with ultraviolet rays.

Description

BLACK CARBON MEASURING APPARATUS [0001]

The present invention relates to a black carbon measuring device, and more particularly to a black carbon measuring device for measuring the amount of black carbon in the air.

Black carbon refers to soot that comes out when a carbon-containing fuel such as coal, oil, or wood burns incompletely. It is usually contained in automobile soot or black smoke from an oven. Aerosols such as black carbon usually contribute to increasing the atmospheric temperature by absorbing solar heat. Black carbon corresponds to soot and is produced by incomplete combustion of a carbon-based compound.

There was no device for measuring the concentration of black carbon, and the concentration of black carbon in the atmosphere could not be measured accurately.

An object of the present invention is to provide a black carbon measuring device for measuring the amount of black carbon in the air.

According to an aspect of the present invention, there is provided a processor for calculating a concentration of black carbon by measuring ultraviolet rays, a detector for detecting ultraviolet rays passing through a filter, and a light emitting element for emitting ultraviolet rays having a wavelength of 880 nm.

Here, the black carbon measuring apparatus further includes a cyclone for separating and delivering ultrafine dust in the air delivered to the filter.

At this time, the black carbon measuring device further includes a motion sensing sensor for measuring left and right up and down vibration, and the processor corrects the concentration of the black carbon by sensing the measured left and right up and down vibration and sensing the posture.

At this time, the black carbon measuring device further includes a moisture removing tube for removing moisture in the air delivered to the filter.

At this time, the black carbon measuring device further includes a server for downloading the measurement data processed by the processor to the outside.

When the black carbon measuring device according to the present invention as described above is used, the black carbon concentration in the air can be measured.

1 is a block diagram showing a black carbon measuring apparatus according to an embodiment of the present invention.
2 is an exemplary view showing the positions of a filter, a light absorption detector, and a light source.
Fig. 3 is an illustration showing the structure of a microcylon.
4 is an exemplary view showing a front surface of a black carbon measuring device.
5 is an exemplary view showing a rear surface of a black carbon measuring device.
6 is a flowchart illustrating a method of measuring a black carbon according to an embodiment of the present invention.
7 is a flowchart illustrating a method of downloading measurement data according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

 The present invention relates to an ultra-small measuring device for measuring the concentration of black carbon in outdoor and indoor air in real time, and an apparatus to be included in the device. The measuring device detects the degree of reduction of the ultraviolet wavelength 880 nm from the light source and decreases as the amount of light passes through the black carbon captured by the filter. The detector detects the amount of light and quantifies it to derive the concentration of black carbon in real time. The measuring device can be equipped with a cyclone to separate ultrafine dust from particulate matter in the air, so that the black carbon contained in the ultrafine dust can be measured. In addition, the measuring apparatus can correct the degree of lateral vibration of the measuring apparatus by attaching the motion sensor in the apparatus.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a black carbon measuring apparatus according to an embodiment of the present invention.

The device configuration of the black carbon measuring device 100 is composed of a light emitting source 110 for outputting ultraviolet light having a wavelength of 880 nm, a filter rotating body 120 for rotating the filter, a light absorption detector 130 for detecting ultraviolet light passing through the filter , A pump 140 for sucking in air, a motion sensor 150 for sensing vibration, a data processor 160 for measuring the concentration of black carbon in air by measuring the detected ultraviolet rays, a power source for supplying power to various devices Supply device 170 and the memory stores the operating system and application programs. The operating system provides an operating environment for executing the program. The program is executed by the processor to cause the black carbon measuring device 100 to operate.

The processor executes the executable code of the memory, the memory stores the executable code and data, and the LCD displays the text and the image. An embodiment of the black carbon measuring apparatus 100 configured on the basis of the apparatus configuration is as follows.

The light emitting source 110 outputs ultraviolet light having a wavelength of 880 nm. The light emitting source 110 drives ultraviolet elements to output ultraviolet rays. The wavelength of 880 nm ultraviolet light is ultraviolet light absorbed by black carbon. The black carbon measuring apparatus 100 can measure the concentration of black carbon by using ultraviolet rays having a wavelength of 880 nm.

The filter rotation actuator 120 rotates the filter. The filter rotation operation body 120 rotates the motor by rotating the motor at predetermined time intervals, stops the motor for a predetermined time, and positions the filter in a predetermined area. Since the filter adsorbs black carbon, black carbon accumulates in the filter after a certain period of time, making it difficult to measure the black carbon. At this time, the filter rotation actuator 120 rotates the filter to place the new filter in the light emitting source 110, so that the black carbon measuring device 100 can measure the concentration of the black carbon.

The light absorption detector 130 detects ultraviolet rays that have passed through a filter placed in a certain region. Air stays around the filter, and the light absorption detector 130 detects ultraviolet rays that have passed through the filter. The black carbon measuring device 100 can measure the concentration of black carbon by measuring the amount of ultraviolet ray reaching the light absorption detector 130. [

The pump 140 sucks air. The sucked air is placed around the filter and discharged to the outlet through the filter. The pump 140 is operated to suck air through the suction port, to suck the sucked air around the filter, and to discharge the air through the filter.

The motion sensor 150 detects and corrects vibration. The motion sensor 150 senses the posture in which the black carbon measuring device 100 is placed. The posture sensed by the motion sensor 150 is input to the data processing device 160. [ The data processing device 160 determines the detected posture and reflects it in the black carbon measurement. If the sensed posture is an attitude causing an error in the black carbon measurement, the data processing device 160 stops the black carbon measurement.

The data processing device 160 measures the amount of infrared light detected through the light absorption detector 130 to measure the amount of black carbon in the air. The data processing device 160 measures the amount of black carbon in the air using the light absorption function derived from the experiment. The light absorption function is an experimentally calculated function of the degree of ultraviolet absorption between the filter and the light absorption detector 130.

The power supply unit 170 supplies power to various devices. The power supply unit 170 receives an external power source, converts the DC power source, and supplies the converted DC power to the device.

2 is an exemplary view showing the positions of a filter, a light absorption detector, and a light source.

The light source 210 outputs ultraviolet rays, the filter 220 passes ultraviolet rays, and the light absorption detector 230 detects ultraviolet rays that have passed through the filter 220 on which the black carbon is accumulated. A configuration for enabling the operation of the optical absorption detector 230 will be described.

The light source 210 is located below the filter 220 and outputs ultraviolet rays to the filter 220. The ultraviolet rays output from the light source 210 spread out. A concave lens may be used for the light source 210.

The ultraviolet rays pass through the filter 220. The filter 220 adsorbs black carbon.

The light absorption detector 230 detects ultraviolet rays that have passed through the filter 220 on which the black carbon is accumulated. The light absorption detector 230 processes the electric signal generated by the ultraviolet ray detection and outputs detection data to the data processing apparatus. The light absorption detector 230 may include at least one ultraviolet sensor.

The filter 220 is equipped with a Teflon-based glass fiber filter and is a single filter injection type. The filter 220 can be replaced.

The experiment derives the light absorption coefficient.

In the experiment, the filter 220 having a constant concentration is placed between the light source 210 and the light absorption detector 230 to compare the degree of light absorption to derive a light absorption function.

The experiment measures the stability of the light absorption coefficient measured at the flow rate stability @ 50 mL / min, @ 100 mL / min for 10 min, 2 hours, 24 hours, 72 hours flow rate. The flow rate depends on pump operation.

Fig. 3 is an illustration showing the structure of a microcylon.

The micro cyclone 300 filters fine dust in the air. The microcylon 300 has a wide suction port. The microcylons 300 are very small, 24 millimeters in height and 12 millimeters in width. The micro cyclone 300 is used to filter fine dust in the air. The microcyclone 300 discharges the dust except the fine dust to the outside and transfers the fine dust to the inside of the filter. Fine dust contains black carbon.

4 is an exemplary view showing a front surface of a black carbon measuring device.

The front surface 400 has an on / off switch 410, an operation LED 420, a filter inlet 430, and an inlet 440.

The on / off switch 410 is a switch for turning on / off the operation of the black carbon measuring device. The on / off switch 410 turns on / off the power of the black carbon measuring device to turn on / off the operation of the black carbon measuring device.

The operation LED 420 indicates that the black carbon measuring device operates. The operation LED 420 displays a blue light when the black carbon measuring device operates normally and a red light when it operates abnormally.

The filter inlet 430 is the inlet for replacing the filter. The filter can be replaced through the filter inlet 430. Since the filter is contaminated by black carbon, it must be replaced according to the number of measurements for correct measurement. When the operation LED 420 turns red, the filter can be replaced through the filter inlet 430.

The suction port 440 is an inlet for sucking air. The suction port 440 sucks air from the outside. The suction port 440 and the pump are connected. Air is sucked into the suction port 440 by the pump operation.

The suction port 440 has a water removing tube for removing moisture. The suction port 440 removes moisture in the air sucked through the water removal tube. Since moisture can affect the black carbon measurement, the water removal tube helps to measure the black carbon by removing moisture from the air.

5 is an exemplary view showing a rear surface of a black carbon measuring device.

The rear surface 500 has a power connection 510, a memory card inlet 520, and an outlet 530.

The power connection 510 receives power from the outside. The power connection 510 connects external power to the power supply.

The memory card inlet 520 replaces the memory card. The memory card stores measurement data. The memory card has a data storage capacity of one month. The memory card inlet 520 is an inlet for attaching and detaching the memory card of a small size.

The outlet 530 discharges air. Air is vented through outlet 530.

6 is a flowchart illustrating a method of measuring a black carbon according to an embodiment of the present invention.

A method of measuring the concentration of black carbon will be described.

The black carbon measuring device includes a program memory for storing a program, a data memory for storing data, and a processor for executing the program.

The data stored in the program memory includes a step 610 of operating the pump by operating the pump, a step 620 of outputting ultraviolet light by driving the ultraviolet element, a step 630 of rotating the filter by rotating the motor, A step 640 of detecting the infrared ray passing through the filter by operating the optical absorption detector, a step 650 of detecting and correcting the vibration, a measurement of the amount of infrared ray detected through the optical absorption detector, (Step 660).

The black carbon measuring device executes the program stored in the program memory by the processor, and the operation will be described as follows.

The procedure executed in the black carbon measuring device will be described in time series.

The black carbon measuring device supplies power to the pump to operate the pump by power supply to suck air (610). The black carbon measuring device sucks air through the suction port.

The black carbon measuring device controls an output port and drives ultraviolet elements through a driving circuit to output ultraviolet rays (620). The black carbon measuring device drives the light source and outputs ultraviolet rays of 880 nm wavelength.

The black carbon measuring device rotates the filter (630). The black carbon measuring device rotates the motor to rotate the filter connected to the motor. The black carbon measuring device rotates the filter at regular intervals and stops the motor for a predetermined time to place the filter in a certain area.

The black carbon measuring device operates the optical absorption detector to detect the ultraviolet ray passing through the filter on which the black carbon is accumulated (640). The black carbon measuring device detects ultraviolet rays through a light absorption detector.

The black carbon measuring device senses and corrects the vibration (650). The black carbon measuring device senses the vibration through the motion sensor. The black carbon measuring device calculates and corrects the sensed vibration. The black carbon measuring device judges the attitude by the sensed vibration. The black carbon measuring device corrects the ultraviolet ray detection according to the determined posture. The black carbon measuring device stops measuring the black carbon if the determined posture is an attitude causing an error in the black carbon measurement.

The black carbon measuring device measures the amount of ultraviolet ray detected through the light absorption detector to measure the amount of black carbon in the air (660). The black carbon measuring device calculates the black carbon concentration indicated by the detected amount of ultraviolet ray using the light absorption function.

이하)를 장치내로 흡입하여, 필터 (석영필터)에 입자를 안착시키고, 필터를 통과한 빛의 흡수도를 모니터링해서, 빛의 흡수도 변화 (발광부의 빛 과 검출부의 빛의 세기 차이)를 블랙카본 질량농도로 함수화하여 실시간 농도자료로 변환시키는 장치이다. 빛의 흡수정도는 안착된 블랙카본 입자의 부하량에 선형적으로 비례함을 기초로 하고 있다. 흡수계수(

)는 아래의 수학식 1로 계산된다.The black carbon measuring device is a real time built-in miniature pump that can be used for super fine dust (mechanical diameter 2.5

(The difference between the light intensity of the light emitting portion and the intensity of the light of the detection portion) was measured in black (black), and the absorption of the light passing through the filter was monitored. It is a device that converts to carbon concentration and converts it to real time concentration data. The degree of absorption of light is based on linearly proportional to the loading of the deposited black carbon particles. Absorption coefficient

) Is calculated by the following equation (1).

수학식 1

Equation 1

및 I는 블랙카본 샘플링 전후 필터 매질 두께 (x)를 통과한 빛의 세기를 나타낸다. 필터에 부착된 블랙카본에 의한 빛의 광학적 흡수정도(Attenuation, ATN)는 다음 수학식 2 관계로부터 계산된다.here,

And I represent the intensity of light passing through the filter medium thickness (x) before and after black carbon sampling. The optical absorption degree (Attenuation, ATN) of light by the black carbon attached to the filter is calculated from the following equation (2).

수학식 2

Equation 2

)는

의 단위를 가진다. 아래는 흡수계수 도출을 위한 수학식 3이다. The black carbon measuring device measures the degree of absorption of light through a quartz fiber matrix having high light scattering capability and assumes that the black carbon is completely diffused into the seaweed fiber filter on which the black carbon is seated. Black Carbon Absorption (

)

Lt; / RTI > The following is Equation 3 for deriving the absorption coefficient.

수학식 3

Equation 3

) 및 ATN은 펌프를 통한 블랙카본 샘플링 시간 (t, min)동안의 빛의 흡수량 변화를 나타낸다. 빛의 흡수계수로부터 블랙카본의 질량농도는 다음과 같이 수학식 4로 계산된다.Where A is the area of the filter spot (m ² ), Q is the flow rate sucked into the pump

) And ATN represent the amount of absorption of light during the black carbon sampling time (t, min) through the pump. From the absorption coefficient of light, the mass concentration of black carbon is calculated by Equation (4) as follows.

수학식 4

Equation 4

은 필터에서 블랙카본의 흡수효율로 880nm의 적외선 파장대에서는 약

=16425/를 사용해서 실험적으로 약 17

(14 ~ 20

)를 가진다.here,

Absorbing efficiency of black carbon in the filter is about 880 nm in the infrared wavelength band

= 16425 / was experimentally estimated to be about 17

(14-20

).

The operating program of the black carbon measuring device measures the amount of black carbon using the derived light absorption function.

The black carbon measuring device has a data storage capacity of one month when measured in 5 minute increments. The black carbon measuring device can increase the data storage capacity by increasing the capacity of the memory card.

The black carbon measuring device has a window-based operating application. The black carbon measuring device can be equipped with an LCD to display a window-based operating application. The black carbon measuring device can display the window interface by loading the operating system and running the application.

The black carbon measuring device can operate real-time measurement data that can simultaneously measure mass concentration and number concentration of ultrafine dust and nanoparticles. The black carbon measuring device can measure ultrafine dust and nanoparticles together with the black carbon measurement.

The black carbon measuring device derives real time BC measurement data, includes correction function, and can download data. The black carbon measuring device can transmit the measurement data to the outside.

7 is a flowchart illustrating a method of downloading measurement data according to an embodiment of the present invention.

A method of downloading measurement data from a black carbon measuring device will be described.

The server includes a program memory for storing a program, a data memory for storing data, and a processor for executing the program. The program stored in the program memory includes a step 710 of connecting to a black carbon measuring device, and a step 720 of downloading measurement data from the black carbon measuring device.

The server includes a web server that connects to the Internet, a data server that processes data, and a database that manages data. The web server connects the service with the black carbon measuring device connected to the Internet, the data server processes various data, and the database manages various data necessary for connection of the service. The web server is responsible for connecting the black carbon measuring device, and the data server is responsible for data processing. The web server includes a script engine that processes requests from the web browser. The web server and the black carbon measuring device perform HTTP communication, and the web server and the data server perform TCP / IP communication.

The server executes the program stored in the program memory and downloads the measurement data.

The black carbon measuring device waits for the connection of the server. A black carbon measuring device can be connected to the server. In another embodiment, a web server may be installed in the black carbon measuring device and connected to the black carbon measuring device in the server.

When the server is connected to the black carbon measuring device (710), the measured data of the black carbon measuring device can be accessed. A data channel is connected between the server and the black carbon measuring device so that the server can access the measured data of the black carbon measuring device.

The server downloads measurement data from the black carbon measuring device (720) and stores it in the database. The server can download the measurement data from the black carbon measuring device with wireless Internet access. The server can connect to the black carbon measuring device and download measurement data whenever a connection is needed.

The administrator who accesses the server can view the measurement data stored in the database. The server reads the measurement data stored in the database according to the manager's request, processes it by the visualization tool, and displays it on the screen. Visualization tools consist of images, letters, and tables. The server uses the visualization tool to process the measurement data and display it on the screen. The administrator can view the graph of the measured data displayed on the screen and check the change of the black carbon.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: Black carbon measuring device 110:
120: filter rotation actuator 130: light absorption detector
140: Pump 150: Motion sensor
160: Data processing unit 170: Power supply unit

Claims (5)

A light emitting element that emits ultraviolet rays having a wavelength of 880 nm,
A detector for detecting an ultraviolet ray passing through the filter, and
And a processor for calculating the concentration of black carbon by measuring the detected ultraviolet ray. The method of claim 1,
Wherein the black carbon measuring device comprises:
Further comprising a cyclone for separating and delivering ultrafine dust from the air to be delivered to the filter. The method of claim 1,
Wherein the black carbon measuring device comprises:
Further comprising a motion-sensing sensor for measuring left and right up-and-down vibration,
The processor comprising:
And measuring the left-right up-and-down vibration to measure the posture to correct the concentration of the black carbon. The method of claim 1,
Wherein the black carbon measuring device comprises:
And a moisture removing tube for removing moisture in the air delivered to the filter. The method of claim 1,
Wherein the black carbon measuring device comprises:
And a server for downloading the measurement data processed by the processor to the outside.

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