KR102389031B1 - Automatic verification standard filter for multi-lane soot telemetry - Google Patents

Abstract

The present invention relates to an apparatus for measuring smoke on a road with an open path method. When a measurement result is changed due to uneven road conditions, climate change, fine dust, or the like and smoke in exhaust gas of vehicles in operation is measured incorrectly, drivers, vehicle owners, and the like may experience inconvenience and damage. Therefore, periodic inspection is essential. However, when installed on perimeter roads or the like, since an operator has to visit a site for inspection, a lot of cost and inspection personnel have been required. In order to solve the problem, provided is a means having an automatic verification standard filter (filter link) with one or more verification filters between vertical transmitters of remote measuring devices for smoke, to remotely verify the remote measuring devices for smoke. According to the present invention, by the above means, it is possible to remotely verify a remote measuring device for smoke at regular time intervals, according to circumstances, or when necessary, so that an operator can always measure smoke with verified equipment without visiting a site for verification.

Description

Automatic verification standard filter for multi-lane soot telemetry {.}

The present invention relates to a smoke telemetry device for a vehicle in motion. More specifically, it relates to a technology for measuring soot generated from the tail of a driving diesel vehicle using an optical method.

Prior research related to the invention of the present application began in 1980 when Professor Donald Stedman of the University of Denver, Colorado, USA developed a prototype for measuring CO with a research fund of the US Department of the Environment (EPA: Environment Protection Agency).

It was initially developed as a research equipment, but later succeeded in commercializing RSD (Remote Sensing Device) equipment in 1991 through joint research with ESP. The RSD equipment was initially developed to measure only CO and CO2, but with continuous development, measurement functions such as HC, NO, and soot (SF, Smoke Factor; the number of soot particles generated per unit fuel) have been added.

In 1990, the United States selected areas with severe air pollution through the Clean Air Act (Air Environment Conservation Act) amendment and designated them as Enhanced Areas, and Light Duty Vehicles registered in the Enforced Area. It was stipulated to allow the use of RSD equipment while stipulating that 0.5% of the vehicle exhaust gas inspection be performed.

In addition, according to the US Federal Register, vehicle emission measurement using RSD equipment for on-road testing program, which is part of the vehicle emission testing system Method and roadside pullovers are adopted. 「Governing Regulations: 40 CFR Ch. I(7-1-04 Edition) §51.371 On-road testing (3), (4)」This institutional support became an opportunity to develop RSD equipment technology.

RSD-related guidelines stipulated by the US Department of Environment (USEPA) for full-fledged use of RSD include “User Guide and Description”

For Interim Remote Sensing Program Credit Utility”, guidance on low-concentration emission vehicle screening “Program User Guide for Interim Vehicle Clean Screening Credit Utility”, and guidance on evaluation of vehicle exhaust gas system “Guidance on Use of Remote Sensing for Evaluation of I /M Program Performance”.

Colorado, Virginia, Texas, and Ohio are four states that have institutionalized and implemented RSD, and Massachusetts is also operating an excessive emission screening and repair system for public buses using RSD. In addition, several states, including California, Kansas, Nevada, New York, Rhode Island, Maryland, Pennsylvania, Arizona, Illinois, Indiana, Connecticut, and Michigan, are using RSD to monitor emissions of 0.5% of their fleet of vehicles tested. In addition, a pilot project for the introduction of the RSD system is in progress in Tennessee (as of 2011).

In addition, several pilot projects using RSD have been conducted in Canada, Australia, Hong Kong, Taiwan, Singapore, Japan, the UK, Spain, and Sweden, and in some countries, pilot projects for the introduction of RSD equipment to the United States are still in progress. is being comprehended.

The RSD equipment currently used in the United States is a light source (infrared, ultraviolet), detector (NDIR, UV spectrometer), reflective mirror module (CCM: Corner Cubic Mirror), speedometer (phototube type), CCD camera for license plate photography, and PC for data processing. etc., and the light source and detector are integrated (SDM: Source/Detector Module).

RSD equipment in the United States is placed on the road in an open path type using light sources (visible light), similarly to the detailed development target technology of this technology development project. A technology is disclosed in which filming is possible and a series of processes required to measure one vehicle is completed within one second.

As a prior patent document, a technique for measuring exhaust gas of a running vehicle is disclosed. In this technology, for measuring the concentration of soot of a diesel vehicle in operation, a transmitter for generating a light source; and a receiver configured to receive the light generated by the transmitter. and a light intensity control unit for maintaining a constant intensity of the light source of the transmitter; and a main control unit that analyzes the signal received by the receiving unit and displays the soot concentration. and a speed sensor for measuring the speed of the moving vehicle.

Registered Patent Publication No. 2176295

A Study on the Development and its Availability of Remote Sensing Device (Smoke) for In-use Vehicle, Author: Dong-Hwan Choi (Korea Testing Laboratory), Gye-Hyun Kim (Jastek) ), Ji-Hoon Kim (Jastech), Seung-Yeol Kim (Korea Testing and Research Institute of Industrial Technology), Society Name: Korean Society of Automobile Engineers Fall Conference and Exhibition 2020 Korea Society of Automotive Engineers Fall Conference and Exhibition 2020.11180 - 181(2 pages)

The invention of the present application is an apparatus for measuring the smoke of a diesel vehicle running on a road in an open-pass method. However, if the road conditions are not constant and the measurement results are changed due to climate change and fine dust, etc., it may cause inconvenience and damage to drivers and vehicle owners if the smoke in the exhaust gas of a running vehicle is incorrectly measured. Therefore, periodic inspection is essential. The problem that the operator takes the risk of having to cross the road to the light source on the other side of the road for audit during operation, and the manual operation of the standard filter during the audit process The testing process is very dangerous and inconvenient.

In particular, when it is installed for fixed unmanned operation on an outlying road, etc., there has been a problem that inspection personnel and cost are high because an operating agent must visit for an audit.

The present invention is intended to automatically solve the above-mentioned inspection or verification (Audit).

To solve the above problems, the following problem solving means are provided.

It has 10 vertical transmitters and 10 vertical receivers, and the transmitter transmits 520 nm light (visible light) for soot measurement, and in the receiver, the light transmitted from the transmitter passes through the soot of a running vehicle, Validation of a soot telemeter using a soot telemeter that measures the absorbed absorption in proportion to the amount of soot emitted from the vehicle, and measures the amount of soot according to the following equation by measuring the absorption ratio with the amount of light transmitted from the transmitter (Audit) ) in the method,

a light source emitting light of 520 nm in the transmitter; and

a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and

an automatic verification standard filter having at least one standard filter used for verification and a measurement hole at the rear end of the reflector; and

and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from the 10 transmitting units, respectively,

The transmitting reflector provides a verification method of a soot telemetry device, characterized in that it can control reflection and transmission according to a control signal of a control unit.

{Soot concentration (%) =

[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)

Transmittance (T) = transmitted light (It) / incident light (Io)

Absorbance (A) = log(1/T) = log(It/Io) = eCL

Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target

(Extinction coefficient e, material concentration C, distance L through which light passes through the material)

Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm considering the diameter of the exhaust pipe of the vehicle and used}

In addition, in the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter includes at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. % and/or 40% and/or 60% of the 520nm light-blocking filter, characterized in that it provides a verification method of a soot telemeter.

In addition, the automatic verification standard filter provides a verification method of a smoke telemetry device, characterized in that it further comprises a light blocking filter that blocks 100% of the light in order to measure the background noise measured by the surrounding environment.

In addition, when a vehicle passes between the transmitter and the receiver while verifying the soot gas telemetry device using the soot gas telemetry device, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. A verification method for a smoke telemeter is provided.

In addition, the automatic verification standard filter further includes a position marker for confirming the initial position to provide a verification method of a soot telemetry, characterized in that the position of the measurement hole can be accurately found.

In addition, the position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor provides a verification method of a soot telemeter, characterized in that it is a magnetic sensor or an optical sensor.

In addition, the automatic verification standard filter provides a verification method of a soot telemeter, characterized in that it is driven to enable accurate position control using a step motor, a server motor, and the like.

In another embodiment

10 vertical transmitters and 10 vertical receivers are provided, wherein the transmitter transmits 520 nm light for soot measurement, and in the receiver, the light transmitted from the transmitter passes through the exhaust gas of a running vehicle, and the exhaust gas In the verification method of a soot gas telemetry device, in which absorption is measured in proportion to the amount of soot contained in and the ratio of the amount of light transmitted from the transmitter to the amount of soot is measured by the following equation,

a light source emitting light of 520 nm in the transmitter; and

a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and

an automatic verification standard filter having a measurement hole and a light blocking filter at the rear end of the reflector; and

and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from each of the 10 transmitting units,

The transmitting reflector controls reflection and transmission according to the control signal of the control unit,

There is provided a verification method for a soot telemetry device, characterized in that the background noise measured by the surrounding environment is measured using the light blocking filter.

{Soot concentration (%) =

[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)

Transmittance (T) = transmitted light (It) / incident light (Io)

Absorbance (A) = log(1/T) = log(It/Io) = eCL

Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target

(Extinction coefficient e, material concentration C, distance L through which light passes through the material)

Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm considering the diameter of the exhaust pipe of the vehicle and used}

In addition, in the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter includes at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. % and/or 40% and/or 60% of the 520nm light-blocking filter, characterized in that it provides a verification method of a soot telemeter.

In addition, when a vehicle passes between the transmitter and the receiver while verifying the soot gas telemetry device using the soot gas telemetry device, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. A verification method for a smoke telemeter is provided.

In addition, the automatic verification standard filter further includes a position marker for confirming the initial position to provide a verification method of a soot telemetry, characterized in that the position of the measurement hole can be accurately found.

In addition, the position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor provides a verification method of a soot telemeter, characterized in that it is a magnetic sensor or an optical sensor.

In addition, the automatic verification standard filter provides a verification method of a soot telemeter, characterized in that it is driven to enable accurate position control using a step motor, a server motor, and the like.

In the background noise measuring method, after blocking the light emitted from the transmitter, 10 to 1000 signals measured for each 10 channels provided in the receiver are measured, and an average value thereof is set as the background noise, and the background noise value Provided is a verification method of a soot telemetry device, characterized in that it is used as a measurement signal only in the case of the above signals.

Temperature, humidity, wind direction and wind speed, fine dust sensors are further provided outside the lower end of the transmitter to add the background noise measurement when any one or more of the measured values such as temperature, humidity, wind speed, and fine dust exceeds the set value It provides a verification method of a soot remote measuring device, characterized in that it is carried out with

Provided is a verification method for a soot telemeter, wherein, when the background noise measurement is performed three or more times within 10 minutes, telemetry of the soot gas is stopped, and this is transmitted to a remote server.

In addition, a rain sensor is further provided at the upper end of the transmitter to stop telemetry of soot gas when the rain sensor detects rain, and to transmit it to a remote server. provide a way

According to the configuration as described above, the present invention can remotely verify the soot telemeter at regular time intervals or according to the environment or when necessary, so that the operator does not need to visit the operator for verification, and soot is always removed with the verified equipment. It has a measurable effect.

1 is a flow chart of soot telemetry of the present invention;
Figure 2 is an overall configuration diagram of the soot telemetry device of the present invention
3 is a picture of soot telemetry of the present invention
4 is a schematic diagram of a running vehicle smoke measurement according to the present invention;
5 shows the state of the beam measured by the receiver before, during, and after entering the vehicle and the time of measurement of the soot according to the present invention of the present invention.
6 is a picture to which a verification filter for verification is applied and some pictures among 10 transmission units of the present invention
7 is a photograph of an automatic verification standard filter installed between a light source and a transmitter for automatic verification of the present invention;
8 is a block diagram of the automatic verification standard filter of the present invention
9 is a software screen for automatically verifying the soot telemetry remotely after installing the automatic verification standard filter of the present invention;
10 is an installation view of a weather sensor for measuring the measurement environment of the present invention;

Looking at the characteristics of air pollution in large cities in Korea, the pollution levels of ozone (O3), fine dust (PM10), and nitrogen dioxide (NO2) are higher than those of large cities in developed countries and show an increasing trend every year, which is a characteristic of major cities around the world. .

Among pollutants that emit air pollutants, pollutants emitted from fixed locations such as factories are relatively easy to manage. is becoming In particular, among mobile pollution sources, automobiles are being discussed as the main emission source of air pollution in large cities, and they are the main target of management.

As the population increases, industry and national economy develop, and people's lives become richer, more convenient lives are demanded, and automobiles, a major emission source of air pollutants, are increasing every year. The number of registered automobiles in Korea was only 130,000 in the 1970s, but the popularization of automobiles began in the early 1990s, and since then, rapid economic growth and a high rate of increase have been shown. As of April 2021, the number of registered vehicles exceeded 24 million.

The increase in the number of vehicles owned not only threatens human health by increasing the concentration of ozone and fine dust, but also emits a large amount of carbon dioxide, a greenhouse gas, which has a significant impact on global warming. are influencing Emission gas management for running vehicles is carried out according to the regular exhaust gas inspection system, but it is not possible to accurately measure the emission of exhaust gases according to the characteristics of continuously operated vehicles.

The remote measuring device is an effective device that can check whether a vehicle is in a running state or not by measuring vehicle exhaust gas in real time. For emission control of running vehicles, Korea manages through regular inspections, frequent inspections, and comprehensive inspections. Comprehensive exhaust gas inspection of running vehicles is a load inspection method (ASM2525) that inspects exhaust gases emitted while driving a vehicle in a certain driving mode (test cycle) on a chassis dynamometer. Currently, it is being implemented in the metropolitan area including Seoul, metropolitan cities, and air management areas. In advanced countries such as the United States and Canada, the load inspection method (IM240) that effectively reflects the actual driving condition of the vehicle has been adopted and tested in advanced countries such as the United States and Canada.

On the other hand, although the no-load inspection method is used for periodic inspection and frequent inspection, the degree of reflecting the exhaust gas of the driving state is very insufficient because it is not measured while the vehicle is running, and the reliability of the inspection is also low. In particular, in the current frequent inspection of running vehicles, not only the amount of measurement compared to the amount of manpower and time required for inspection is very small, but also civil complaints due to the unannounced check-type compulsory stop inspection, and frequent inspections due to work carried out on the road for long periods of time. There are many risk factors such as exposure to health and safety accidents.

Therefore, it is an open-path type that can satisfy both the inspector and the examiner while improving the reliability of the measurement result by efficiently reflecting the driving condition of the exhaust gas of the driving vehicle without disturbing the flow of the vehicle running on the road. It is necessary to develop new inspection equipment.

For telemetry, the entire integrated system including the optical system must be developed, and the development items are as follows.

1. Measurement method: Open path type exhaust gas measurement using optical method (using Green Laser)

2. Vehicle number recognition: Development of vehicle number recognizer using CCD camera and algorithm

3. Vehicle speed measurement: Development of vehicle speed and acceleration measurement device using laser method or optics

4. Standard filter for verification or standard filter for automatic verification: Standard filter for confirming the accuracy of remote measuring instruments

5. Smoke measurement logic: vehicle pass check and measurement time calculation, development of smoke measurement value conversion program

6. Integrated program development: full integrated software development

7. Development of stationary unmanned operation hull: development of sensor and mechanism for automatic unmanned operation and development of automatic unmanned operation program

A remote measurement system for exhaust pollutants from running vehicles has been developed by the above configuration.

Among them, the present invention intends to provide an open-path type soot measuring device to which a green laser is applied.

This measures soot using an open-path method that directly measures the soot emitted from the moving vehicle to the atmosphere without inhaling a sample of the gas to be measured on the road to measure the soot emitted from the moving vehicle.

In the open path measurement method, as the measurement target material diffuses to the outside, the concentration decreases and is affected by the outside, so the measurement precision is lower than the close-path method using the measurement sample cell, but it is effectively excessive in the vehicle on the road. It is a method that can measure the exhaust smoke.

1 is a flow chart of the operation of the soot telemetry of the present invention.

1. Apply the check whether the vehicle has passed or not, measure the soot by applying the soot measurement logic

2. License plate shooting camera takes a picture of the license plate of the vehicle being measured and stores the image

3. Application of an algorithm that can recognize the vehicle number through the photograph of the license plate

4. Calculation of measured soot value, application of specific output (VSP) calculation logic through the speed and acceleration of the measured vehicle, merging of vehicle number data and application of DB storage logic development, watermarking of data such as soot, VSP, etc.

5. All measured data is stored in the integrated control PC, and data and photos are displayed for monitoring by operating personnel, etc.

Figure 2 shows the overall configuration of the soot telemetry device of the present invention. The smoke telemetry of the present application includes a transmitter and a receiver; and a vehicle recognition camera that recognizes a vehicle number in order to obtain vehicle information of the running vehicle, and an integrated control PC that reads and controls sensing values such as the transmitter, the receiver, the camera and the speed sensor.

3 shows a picture of soot telemetry of the present invention. The smoke is measured immediately after the vehicle has passed.

4 is a schematic diagram illustrating a method for measuring the concentration of a substance in a driving vehicle smoke measurement diagram according to the present invention. The soot telemeter of the present invention measures the amount of transmitted light remaining after being absorbed by the exhaust gas when the light source emitted from the transmitter passes through the exhaust gas injected to the rear of the driving vehicle and then is received by the receiver.

Absorbance is calculated by using Beer-Lambert's law, and the concentration of soot is measured using this value.

Smoke concentration (%) =

[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)

Transmittance (T) = transmitted light (It) / incident light (Io)

Absorbance (A) = log(1/T) = log(It/Io) = eCL

Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target

(Extinction coefficient e, material concentration C, distance L through which light passes through the material)

Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm in consideration of the diameter of the exhaust pipe of the vehicle.

5 is a view showing the state of the beam measured by the receiver before, during, and after entering the vehicle, and the smoke measurement time point when measuring the smoke according to the present invention. It is normal for no measurement to take place before the vehicle enters. The transmitter transmits light and detects the vehicle's entrance through a speed meter. As the vehicle enters, the receiver measures several signals. Depending on the shape of the vehicle, a signal of the transmitter may be measured through a window or radiated from 10 vertically provided sensors, or an external light may be reflected by a vehicle body to measure a signal. The receiver measures the light intensity by passing only the 520nm wavelength light transmitted from the transmitter in the bandpass filter. When the vehicle passes through the transmitter and the receiver, a signal of soot emitted to the rear of the vehicle is measured from that moment. This is explained by dividing it into sections a, b, and c.

6 is a picture to which a verification filter for verification is applied and some pictures among 10 transmission units of the present invention. As a part explaining the necessity of the present invention, accuracy of measurement is very important in an apparatus for measuring the exhaust gas of a moving vehicle. This is because, when measured incorrectly, a vehicle that emits a lot of soot is a problem as it spit out a lot of soot while traveling on the road. In order to prevent such a problem in advance, the sensitivity of the sensor is measured at each cycle to verify whether accurate measurement is being performed. For this purpose, a standard measurement filter as shown in FIG. 6 is provided, and it is inserted into each of the 10 channels to periodically verify all of them. For the verification, three types of filters are used. This is because the measurement sensitivity may be different for each light intensity. Currently, it is necessary to replace the filter 30 times to verify the measurement of 10 channels. The present invention is intended to solve these problems.

7 is a photograph in which the automatic verification standard filter (filter link) for automatic verification of the present invention is installed between the light source and the transmitter. The light from the light source passes through the reflection unit and the light is transmitted to the transmission unit of 10 channels, and an automatic verification standard filter (filter link) is provided between them to control this. That is, 20%, 40%, 60%, and 100% light blocking rotation filters are provided, and the automatic verification standard filter (filter link) is rotated as necessary to verify the soot telemetry. The automatic verification standard filter may be coupled to a servo motor equipped with a step motor or an encoder capable of rotating and controlling the rotation position of the automatic verification standard filter, and a magnet for detecting the position of the automatic verification standard filter; A hole or a color can be displayed, and a hall sensor (magnetic sensor), an optical sensor, etc. can be used as a means for detecting this.

The verification method using the filtering key (automatic verification standard filter) is as follows. The intensity Io of the light source is measured, and after applying the standard filter 20, which is the 20% standard filter, the light intensity is measured at the light receiving unit. When a 20% standard filter is used, 80% of the intensity Io of the light source should be measured. However, even when 20% light should be reduced due to various environmental influences such as moisture and fine dust, 20% or more of light can be reduced and measured. In this case, the value measured by the light receiving unit is stored as a 20% calibration value in the corresponding channel. In the same way, apply the 40% and 60% reduction standard filters and register the measured values as the calibration values of the corresponding channels, respectively. In this way, the calibration values at three points are generated, the first calibration line closest to these calibration values is made, the measured value measured at the light receiving unit is substituted into the calibration line, the absorbance is calculated, and the absorbance is substituted into Equation (1) to measure the concentration of soot.

8 is a block diagram of the automatic verification standard filter (filter link) of the present invention. As described above, 20%, 40%, 60% and 100% light blocking filters are provided in the automatic verification standard filter. In order to transmit light without the light loss, a hole may be punched in the automatic verification standard filter.

9 shows a software screen for automatically verifying the soot telemetry remotely after installing the automatic verification standard filter (filter link) of the present invention. The light blocking of the filter used for verification is selected and the received light intensity is measured for each channel.

In overseas cases, a standard filter is used to verify the measurement accuracy of the soot telemeter, but in this way, after installing the soot telemeter, the operator at the installation site inserts a standard filter of each concentration for each optical path, and the soot telemeter A method is used to check whether the measured value is read within the tolerance. In addition, in the case of a light transmission type smoke meter by sampling with a probe used in a general automobile inspection station, a standard filter is used to verify the measurement accuracy. However, even in the case of such a light transmission type smoke meter, the work time is increased because the inspector uses a verification method that inserts a standard filter between the light source and the detector by hand to check whether the light transmission type smoke unit reads the measured value within the allowable error. and the inspection efficiency is low. Verification of these light-transmitting smoke detectors by a smoke standard filter is legislated to be carried out at least once a day in accordance with the domestic laws and regulations (Ministry of Environment Notice No.

10 is an installation view of a weather sensor for measuring the measurement environment of the present invention. The present invention also provides a means for measuring background noise using a filter that blocks 100% of the light. Background noise is a signal measured by the measurement unit that occurs even though there is no measurement signal. The light receiver is very sensitive to temperature, and when measuring on the road, the reflected light reflected from the road or the traffic light reflected by fine dust in the air can be always measured by the light receiver, and all of these can be measurement noise. On the other hand, fine dust in the air may also interfere with soot measurement, and in the case of humidity, a lot of light scattering and light absorption may occur, so it is necessary to remove the effect of humidity as well. Therefore, it was attempted to reduce the measurement error by measuring the environment around the measuring instrument. To this end, a sensor for measuring temperature, humidity, fine dust and wind speed may be further provided on the outer surface of the transmitter. In addition, a rain sensor may be further provided at the installation location of the soot telemeter of the present invention to stop the measurement when it rains.

The present invention is an apparatus for measuring soot in an open-pass method, and the optical path environment between the transmitter and the receiver is very important for measurement. The cleaner the better, but it can't always be clean. Therefore, in addition to periodic verification of the device, there is a need for a technique to reduce errors by periodically measuring changes in light intensity due to the influence of background noise, fine dust, and humidity with the weather sensor, and the present invention applies it and there is.

In addition, in the case of a channel with a deviation of 10% or more as an absolute value of soot concentration in the measured values measured for each of the 10 channels during the verification process, the integrated control program can check the normal operation of the channel and repair it if necessary ALARM is indicated to the operator at the company, and if there is a problem with the measurement result for each channel, the corresponding channel should not be used for smoke measurement. When a specific channel cannot be measured in this way, it is possible to predict whether the measured vehicle exceeds the allowable soot emission by predicting the measurement value of the channel adjacent to the corresponding channel from the results of the existing measurement data according to the type of vehicle.

In addition, in order to check the contamination of the surface of the transmitter, a camera that can check all the surfaces of the 10 channels of the transmitter may be additionally installed at the upper end of the transmitter.

It goes without saying that a camera that can check all the surfaces of the 10 channels of the receiver can be additionally installed at the top of the receiver in order to check the contamination of the surface of the receiver.

In addition, when the wind speed of the anemometer of the weather meter installed together with the smoke remote meter is equal to or greater than the set value set by the operator, the measurement of the smoke remote meter may be stopped and this may be notified remotely through the server.

In addition, a shock sensor may be further provided in the transmitter and/or receiver to remotely detect a collision or damage to the soot telemeter by a passer-by or a vehicle.

In order to exhibit the above-mentioned effects, the following problem solving means are provided.

It has 10 vertical transmitters and 10 vertical receivers, and the transmitter transmits 520 nm light (visible light) for soot measurement, and in the receiver, the light transmitted from the transmitter passes through the soot of a running vehicle, Validation of a soot telemeter using a soot telemeter that measures the absorbed absorption in proportion to the amount of soot emitted from the vehicle, and measures the amount of soot according to the following equation by measuring the absorption ratio with the amount of light transmitted from the transmitter (Audit) ) in the method,

a light source emitting light of 520 nm in the transmitter; and

a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and

an automatic verification standard filter having at least one standard filter used for verification and a measurement hole at the rear end of the reflector; and

and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from the 10 transmitting units, respectively,

The transmitting reflector provides a verification method of a soot telemetry device, characterized in that it can control reflection and transmission according to a control signal of a control unit.

{Soot concentration (%) =

[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)

Transmittance (T) = transmitted light (It) / incident light (Io)

Absorbance (A) = log(1/T) = log(It/Io) = eCL

Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target

(Extinction coefficient e, material concentration C, distance L through which light passes through the material)

Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm considering the diameter of the exhaust pipe of the vehicle and used}

In addition, in the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter includes at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. % and/or 40% and/or 60% of the 520 nm light-blocking filter provides a verification method of a soot telemeter.

In addition, the automatic verification standard filter provides a verification method of a soot telemetry device, characterized in that it further comprises a light blocking filter that blocks 100% of the light in order to measure the background noise measured by the surrounding environment.

In addition, when a vehicle passes between the transmitter and the receiver while verifying the soot telemeter using the smoke telemeter, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. A verification method is provided.

In addition, the automatic verification standard filter further includes a position marker for confirming the initial position to provide a verification method of a soot telemetry, characterized in that it is possible to accurately find the position of the measurement hole.

In addition, the position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor provides a verification method of a soot telemeter, characterized in that it is a magnetic sensor or an optical sensor.

In addition, the automatic verification standard filter provides a verification method of a smoke telemetry device, characterized in that it is driven to enable accurate position control using a step motor, a server motor, and the like.

In another embodiment

10 vertical transmitters and 10 vertical receivers, wherein the transmitter transmits 520 nm light for soot measurement, and in the receiver, the light transmitted from the transmitter passes through the exhaust gas of a running vehicle, and the exhaust gas In the verification method of a soot telemeter, which measures the absorbed absorption in proportion to the amount of soot contained in the and measures the amount of soot by the ratio of the amount of light transmitted from the transmitter to the following equation,

a light source emitting light of 520 nm in the transmitter; and

a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and

an automatic verification standard filter having a measurement hole and a light blocking filter at the rear end of the reflector; and

and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from each of the 10 transmitting units,

The transmitting reflector controls reflection and transmission according to the control signal of the control unit,

There is provided a verification method for a soot telemeter, characterized in that the background noise measured by the surrounding environment is measured using the light blocking filter.

{Soot concentration (%) =

[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)

Transmittance (T) = transmitted light (It) / incident light (Io)

Absorbance (A) = log(1/T) = log(It/Io) = eCL

Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target

(Extinction coefficient e, material concentration C, distance L through which light passes through the material)

Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm in consideration of the diameter of the exhaust pipe of the vehicle and used}

In addition, in the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter includes at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. % and/or 40% and/or 60% of the 520 nm light-blocking filter provides a verification method of a soot telemeter.

In addition, when a vehicle passes between the transmitter and the receiver while verifying the soot telemeter using the smoke telemeter, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. A verification method is provided.

In addition, the automatic verification standard filter further includes a position marker for confirming the initial position to provide a verification method of a soot telemetry, characterized in that it is possible to accurately find the position of the measurement hole.

In addition, the position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor provides a verification method of a soot telemeter, characterized in that it is a magnetic sensor or an optical sensor.

In addition, the automatic verification standard filter provides a verification method of a smoke telemetry device, characterized in that it is driven to enable accurate position control using a step motor, a server motor, and the like.

In the background noise measuring method, after blocking the light emitted from the transmitter, 10 to 1000 signals measured for each 10 channels provided in the receiver are measured, and an average value thereof is set as the background noise, and the background noise value Provided is a verification method for a soot telemetry device, characterized in that only the above signals are used as a measurement signal.

Temperature, humidity, wind direction and wind speed, fine dust sensors are further provided outside the lower end of the transmitter to add the background noise measurement when any one or more of the measured values such as temperature, humidity, wind speed, and fine dust exceeds the set value It provides a verification method of a soot remote measuring device, characterized in that it is carried out with

Provided is a verification method for a soot telemetry device, characterized in that when the background noise measurement is performed three or more times within 10 minutes, telemetry of soot is stopped and this is transmitted to a remote server.

In addition, a rain sensor is further provided at the upper end of the transmitter to stop telemetry of soot when the rain sensor detects rain, and to transmit it to a remote server. provides

In addition, an image recognition camera for confirming the location of the exhaust gas outlet of the vehicle when the vehicle enters 5 m ahead of the vehicle's entry direction on the side of the receiver is further provided to check and measure the vehicle exhaust port. A verification method is provided.

100: transmitter
110: transmission channel (1 to 10)
120: standard filter (20%, 40%, 60%)
150: weather sensor
160: Rain Sensor
200: receiver
300: vehicle number recognition camera
400: mobile station
500: automatic verification standard filter (filter link)
510: standard filter 100
520: standard filter 60
530: standard filter 40
540: standard filter 20
550: measurement hole
560: position marker

Claims (17)

It has 10 vertical transmitters and 10 vertical receivers, and the transmitter transmits 520 nm light (visible light) for measurement of soot, and in the receiver, the light transmitted from the transmitter passes through the soot of a running vehicle, Validation of a soot telemeter using a soot telemeter that measures the absorbed absorption in proportion to the amount of soot emitted from the vehicle, and measures the amount of soot according to the following equation by measuring the absorption ratio with the amount of light transmitted from the transmitter (Audit) ) in the method,
a light source emitting light of 520 nm in the transmitter; and
a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and
an automatic verification standard filter having at least one standard filter used for verification and a measurement hole at the rear end of the reflector; and
and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from the 10 transmitting units, respectively,
The transmitting reflector is a verification method of a soot telemetry, characterized in that it can control the reflection and transmission according to the control signal of the control unit.
{Soot concentration (%) =
[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)
Transmittance (T) = transmitted light (It) / incident light (Io)
Absorbance (A) = log(1/T) = log(It/Io) = eCL
Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target
(Extinction coefficient e, material concentration C, distance L through which light passes through the material)
Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm considering the diameter of the exhaust pipe of the vehicle and used} According to claim 1,
In the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter is provided with at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. / or 40% and / or 60% of the 520nm light-blocking filter, characterized in that the verification method of the soot telemeter. 3. The method of claim 2,
The automatic verification standard filter further comprises a light blocking filter that blocks 100% of light in order to measure background noise measured by the surrounding environment. 4. The method of claim 3,
When a vehicle passes between the transmitter and the receiver while verifying the soot telemeter using the smoke telemeter, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. Way. 5. The method of claim 4,
The automatic verification standard filter further includes a position marker for confirming the initial position, so that the position of the measurement hole can be accurately found. 6. The method of claim 5,
The position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor is a magnetic sensor or an optical sensor. 7. The method of claim 6,
The automatic verification standard filter is a verification method of a smoke telemetry device, characterized in that it is driven to enable accurate position control using a step motor, a server motor, etc. 10 vertical transmitters and 10 vertical receivers, wherein the transmitter transmits 520 nm light for soot measurement, and in the receiver, the light transmitted from the transmitter passes through the exhaust gas of a running vehicle, and the exhaust gas In the verification method of a soot telemeter, which measures the absorbed absorption in proportion to the amount of soot contained in the and measures the amount of soot by the ratio of the amount of light transmitted from the transmitter to the following equation,
a light source emitting light of 520 nm in the transmitter; and
a reflector for connecting an optical path of the light emitted from the light source to the ten vertical transmitters; and
an automatic verification standard filter having a measurement hole and a light blocking filter at the rear end of the reflector; and
and 10 transmitting reflectors for distributing light so that the light passing through the automatic verification standard filter can be transmitted from each of the 10 transmitting units,
The transmitting reflector controls reflection and transmission according to the control signal of the control unit,
A method of verifying a soot telemetry device, characterized in that the background noise measured by the surrounding environment is measured using the light blocking filter.
{Soot concentration (%) =
[log((Transmitted light (It) - Background measurement value (Ib))/Incident light (Io))]/(eL) ... (Equation 1)
Transmittance (T) = transmitted light (It) / incident light (Io)
Absorbance (A) = log(1/T) = log(It/Io) = eCL
Background noise (N) = background measurement value (Ib); Receiver sensor value measured when the transmitter light source is turned off and there is no measurement target
(Extinction coefficient e, material concentration C, distance L through which light passes through the material)
Here, the extinction coefficient e is a value that can be measured through an experiment, and the distance L through the material is set to 100 mm in consideration of the diameter of the exhaust pipe of the vehicle and used} 9. The method of claim 8,
In the automatic verification standard filter, a standard filter is used for the verification filter, and the standard filter is provided with at least one standard filter among a standard filter of 20% concentration, a standard filter of 40% concentration, and a standard filter of 60% concentration. / or 40% and / or 60% of the 520nm light-blocking filter, characterized in that the verification method of the soot telemeter. 10. The method of claim 9,
When a vehicle passes between the transmitter and the receiver while verifying the soot telemeter using the smoke telemeter, it is detected and the verification is stopped for at least 20 seconds after the vehicle has passed. Way. 11. The method of claim 10,
The automatic verification standard filter further includes a position marker for confirming the initial position, so that the position of the measurement hole can be accurately found. 12. The method of claim 11,
The position marker can be displayed with a magnet, a small hole, and a color, and the position detection sensor is a magnetic sensor or an optical sensor. 13. The method of claim 12,
The automatic verification standard filter is a verification method of a smoke telemetry device, characterized in that it is driven to enable accurate position control using a step motor, a server motor, etc. 9. The method of claim 1 or 8,
In the background noise measuring method, after blocking the light emitted from the transmitter, 10 to 1000 signals measured for each 10 channels provided in the receiver are measured, and an average value thereof is set as the background noise, and the background noise value A verification method of a smoke telemetry device, characterized in that it is used as a measurement signal only in the case of the above signal. 15. The method of claim 14,
Temperature, humidity, wind direction and wind speed, fine dust sensors are further provided outside the lower end of the transmitter to add the background noise measurement when any one or more of the measured values such as temperature, humidity, wind speed, and fine dust exceeds the set value A verification method of a soot remote measuring device, characterized in that it is carried out with 15. The method of claim 14,
When the background noise measurement is performed three or more times within 10 minutes, the soot telemetry is stopped and the soot telemetry is transmitted to a remote server. 15. The method of claim 14,
A method of verifying a soot telemeter, characterized in that a rain sensor is further provided at the upper end of the transmitter to stop the telemetry of soot when the rain sensor detects rain, and transmit it to a remote server.

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