TWI633301B - Calibration method and system thereof for particulate matter sensors - Google Patents

Abstract

A fine aerosol detector calibration system includes a detection light emitter, a dust light detector, a light conversion module and a correction module. The detection light emitter emits a predetermined light to the same gas, and the sample gas contains a plurality of fine aerosols. The dust light detector is configured to measure the scattering, refraction or reflection of the predetermined light to obtain a light measurement value, and the light conversion module converts the light measurement value into a fine suspended particle measurement value. The calibration module uses a system parameter, a detected light wave interference parameter, a reference point, a total field maximum value, a mean value coefficient, and a regression reference coefficient to jointly correct the fine aerosol measurement value, so as to obtain a Correct the fine aerosol value.

Description

Fine suspension particle detector calibration method and system thereof

The invention relates to a method for correcting a fine particle (PM) detector and a system thereof, in particular to a fine aerosol PM 1.0, PM 2.5, PM 10 detector calibration method and system thereof More particularly, it relates to an optical (optical) fine aerosol detector calibration method and system thereof.

Conventional fine aerosol detection system and method thereof, for example, US Patent Publication No. 2013/0036837, MULTI-FILTER PM 10-PM 2.5 SAMPLER(R) invention patent application, which discloses a multi-filter PM 10-PM 2.5 sampler . The sampler comprises a PM 10 inertial impactor, a manifold, a PM 10 flow distributor, several PM 10 filter devices, a PM 2.5 inertial impactor, a PM 2.5 flow distributor, and several PM 2.5 filter devices. A combined flow component and a pumping pump.

The branch tube has a top end, a left end and a right end, and the top end is connected to the PM 10 inertial impactor. The PM 10 flow distributor has an inlet end and a plurality of outlet ends, and the inlet end is connected to the left end of the branch pipe. The plurality of PM 10 filter paper devices are respectively connected to a plurality of outlets of the PM 10 flow distributor. The PM 2.5 inertia impactor is coupled to the right end of the manifold, and the PM 2.5 flow distributor has an inlet end and a plurality of outlet ends, and the inlet end is coupled to the PM 2.5 inertia impactor. The plurality of PM 2.5 filter paper devices are respectively connected to the plurality of outlet ends of the PM 2.5 flow distributor. The merging assembly is connected to the plurality of PM 10 filter paper devices and a plurality of PM 2.5 filter paper devices, and the merging assembly is further connected to the Pumping pump.

However, the multi-filter paper PM 10-PM 2.5 sampler of the aforementioned U.S. Patent Publication No. 2013/0036837 is obviously only a multi-filter paper type air quality detecting technology, and it is not an optical air quality detecting technology. In fact, although the conventional optical air quality detector has the advantages of convenient use and rapid operation, the detected value has a considerable error, that is, the accuracy of the detected value is extremely low.

Obviously, the conventional optical air quality detection technology necessarily has the need to further improve or subsequently correct its detection value, and there is also a need to further provide its monitoring management system. The foregoing patents are only for the purpose of reference to the present invention, and are not intended to limit the scope of the present invention.

In view of the above, in order to meet the above technical problems and needs, the present invention provides a fine aerosol detector calibration method and system thereof, which utilizes a system parameter and a detected light wave interference parameter as an optical detector. One of the basic correction parameters, and several environmental monitoring points are obtained by several environmental monitoring points, and the environmental monitoring data is used to find a reference point, a total field maximum value and a mean value coefficient, and then use the several environments. The monitoring data is statistically calculated to obtain at least one regression reference coefficient, and then the system parameters, the detected light wave interference parameter, the reference point, the total field maximum value, the mean coefficient and the regression reference coefficient are combined to correct a fine suspended particle measurement value. It has the effect of improving accuracy compared to the conventional optical air quality detector.

The main object of the preferred embodiment of the present invention is to provide a fine aerosol detector calibration method and system thereof, which use a system parameter and a detected light wave interference parameter as a basic correction parameter of an optical detector. Then, several environmental monitoring data are obtained by actual measurement at several environmental monitoring points, and the environmental monitoring data is used to find a reference point and a total site maximum. Value and a mean coefficient, and then using the plurality of environmental monitoring data for statistical calculation to obtain at least one regression reference coefficient, and then using the system parameters, detecting light wave interference parameters, reference points, total field maximum value, mean coefficient, and regression The reference coefficients are combined to correct a fine aerosol measurement value to achieve the purpose of improving the accuracy of fine aerosol detection.

In order to achieve the above object, a fine aerosol detector calibration system according to a preferred embodiment of the present invention includes: a detection light emitter that optically emits a predetermined light to the same gas, and the sample gas contains a plurality of fine Suspending particles, such that when the predetermined light passes through the fine aerosol of the sample gas, causing the predetermined light to generate a scattering, a refractive angle or a reflection angle; at least one of the dust light detectors is oppositely disposed in the detection One of the light emitters predetermined a light receiving angle, and the dust light detector is configured to measure the scattering, refraction or reflection of the predetermined light to obtain a light measurement value; and a light conversion module, the light quantity The measured value is converted into a fine suspended particle measurement value; and at least one calibration module is connected to the light conversion module to correct and calculate the fine suspended particle measurement value; wherein the calibration module simultaneously utilizes a system parameter, Detecting the light wave interference parameter, a reference point, a total field maximum value, a mean value coefficient, and a regression reference coefficient together to correct the fine suspension Tablets measured value to obtain a corrected value of fine suspended particles.

In the preferred embodiment of the present invention, the detection light emitter is selected as an infrared module, a laser light module, a light emitting diode module or other light emitting module.

In the preferred embodiment of the invention, the dust detector is selected as a photodiode, a photodiode or other photodetector.

The light conversion module and the correction of the preferred embodiment of the present invention The modules are integrated to form a single calculus module.

In the preferred embodiment of the invention, the regression reference coefficients are selected as linear regression coefficients, polynomial regression coefficients or other regression reference coefficients.

The fine aerosol measurement of the preferred embodiment of the invention is a fine aerosol concentration or a fine aerosol particle size.

In order to achieve the above object, a fine aerosol detector calibration method according to a preferred embodiment of the present invention includes: selecting an optical detector, and the optical detector can obtain the same gas, and the optical detector A system parameter and a detection light wave interference parameter are applied, and the system parameter and the detected light wave interference parameter are a basic correction parameter; using a plurality of environmental monitoring data to find a reference point, a total field maximum value and a mean value coefficient And obtaining the plurality of environmental monitoring data by using a plurality of environmental monitoring points; using the plurality of environmental monitoring data for statistical calculation to obtain at least one regression reference coefficient; and using the system parameter to detect the interference parameter of the optical wave The reference point, the total field maximum value, the mean coefficient and the regression reference coefficient are combined to correct a fine aerosol measurement value to obtain a corrected fine aerosol value.

In the preferred embodiment of the present invention, the optical detector includes a detection light emitter, and the detection light emitter is selected as an infrared module, a laser light module, a light emitting diode module or the like. Light emission module.

In the preferred embodiment of the present invention, the optical detector includes a dust photodetector, and the dust detector is selected as a photodiode, a photodiode or other photodetector.

In the preferred embodiment of the invention, the regression reference coefficients are selected as linear regression coefficients, polynomial regression coefficients or other regression reference coefficients.

The measured value of the fine suspended particles in the preferred embodiment of the present invention is A fine aerosol concentration or a small amount of suspended particles.

1‧‧‧Small aerosol detector calibration system

1a‧‧‧Small aerosol detector calibration system

10‧‧‧Portable fine aerosol detector

100‧‧‧Air filter

11‧‧‧Detecting light emitter

12‧‧‧Dust dust detector

13‧‧‧Light Conversion Module

14‧‧‧ Calibration module

15‧‧‧ Warning System

2‧‧‧Wireless transmitter

3‧‧‧ Data Collector

Figure 1 is a block diagram showing a fine suspension particle detector calibration system in accordance with a first preferred embodiment of the present invention.

2 is a flow chart showing a method for correcting a fine aerosol detector of a preferred embodiment of the present invention.

Figure 3 is a schematic view showing the fine aerosol detector calibration system of the first preferred embodiment of the present invention disposed in a portable fine aerosol detector.

Figure 4 is a schematic view showing the arrangement of the fine aerosol detector calibration system of the first preferred embodiment of the present invention in an air filter.

Figure 5 is a block diagram showing a fine suspension particle detector calibration system in accordance with a second preferred embodiment of the present invention.

In order to fully understand the present invention, the preferred embodiments of the present invention are described in detail below, and are not intended to limit the invention.

The fine suspension particle detector calibration method and system thereof are applied to various fine aerosol detector construction, calibration operation methods and management systems thereof, for example: portable dust detector, indoor [indoor a fine aerosol monitoring system, an outdoor fine aerosol monitoring system, a fine suspension manual monitoring system, a fine aerosol automatic monitoring system or other fine aerosol detecting system, but it is not intended to limit the present invention. The scope.

1 is a block diagram showing a fine suspension particle detector calibration system in accordance with a first preferred embodiment of the present invention. Referring to FIG. 1 , the fine aerosol detector calibration system 1 of the first preferred embodiment of the present invention includes a ray irradiation member 11 and a ray detector. Member]12, a ray conversion module 13 and at least one calibration module The calibrating module 14 and the detecting light emitter 11 , the dust detecting device 12 , the light converting module 13 and the correcting module 14 are appropriately combined with the fine aerosol detector calibration system 1 .

Referring to FIG. 1 again, for example, the detection light emitter 11 can be selected as an infrared module (infra-red module), a laser module, and a light emitting diode module. Group (light emitting diode module) or other light emitting module. The detecting light emitter 11 optically emits a predetermined light to the same gas, and the sample gas contains a plurality of fine suspended particles [PM 1.0, PM 2.5, PM 10 or other diameter dust] to pass the predetermined light. When the fine particles of the sample gas are suspended, the predetermined light causes a scattering, a refractive angle or a reflection angle.

Referring to FIG. 1 again, for example, the dust light detector 12 can be selected as a photodiode, a photo transistor, or other photodetector, or Choose either scatter or non-scatter measurements. The dust light detector 12 is oppositely disposed at a predetermined light receiving angle of the detecting light emitter 11 , and the dust light detector 12 is configured to measure scattering, refraction or reflection of the predetermined light to obtain A measured value of light or a measured value of light passing through the dust.

Referring to FIG. 1 again, for example, the detection light emitter 11 and the dust detector 12 form an optical detector, as shown by the dashed box in FIG. The optical detector can be selected from a variety of brand optical detectors such as SHARP, Panasonic, PHILIPS, Daikin or other optical detectors. However, the initial detection value is usually inaccurate and therefore requires further correction.

Referring to FIG. 1 again, for example, the light conversion module 13 can be selected from a physical circuit and a virtual circuit. [virtual circuit], an editable logic chip, an editable computer program, or a component with similar functions. The light conversion module 13 converts the light measurement value (or the dust light measurement value) into a fine aerosol measurement value.

Referring to FIG. 1 again, for example, the correction module 14 can be selected from a physical circuit, a virtual circuit, an editable logic chip, an editable computer program, or a similar function. The correction module 14 is connected to the light conversion module 13 to correct and calculate the fine aerosol measurement value.

In another preferred embodiment of the present invention, the light conversion module 13 and the correction module 14 are integrally combined to form a single calculation module or a module similar to the calculation function. For example, the fine aerosol measurement is a fine aerosol concentration [mg/m ³ ] or a fine aerosol amount.

Referring to FIG. 1 again, the fine aerosol detector calibration system 1 of another preferred embodiment of the present invention includes a warning system 15 for providing a warning signal for alerting the amount of fine aerosol. Whether the measured value exceeds the standard or various dangerous levels. For example, the warning signal is generated by a buzzer, a warning light or other warning signal generator (for example, a loudspeaker).

FIG. 2 is a flow chart showing a method for correcting a fine aerosol detector according to a preferred embodiment of the present invention, which corresponds to the fine aerosol detector calibration system 1 of FIG. Referring to Figures 1 and 2, the method for correcting the fine aerosol detector of the preferred embodiment of the present invention comprises the step S1: first, an optical detector is selected, and the optical detector can obtain the same Gas, and the optical detector is adapted to a system parameter (ie, original conversion mode and parameter) and a detected light wave interference parameter (ie, proportional parameter, ratio), and the system parameter and the detected light wave interference parameter are A basic correction parameter.

Referring to FIGS. 1 and 2 again, the method for correcting the fine aerosol detector of the preferred embodiment of the present invention comprises the step S2: then, using a plurality of environmental monitoring data to find a reference point (ie, the measured starting value), The total maximum value of the site (that is, the highest measured value) and a mean value coefficient (ie, the mean value formula, for example, 0.5), and the several environmental monitoring data are obtained by actual measurement at several environmental monitoring points. For example, the present invention selects the plurality of environmental monitoring points including Singapore, Japan, Hong Kong, Shenzhen, Shanghai, Taipei, Taichung, Changhua, Tainan, Kaohsiung, etc., that is, the aforementioned locations are all geographically related.

Referring to FIG. 1 and FIG. 2 again, the method for correcting the fine aerosol detector of the preferred embodiment of the present invention comprises the step S3: followed by the single calculation module of the light conversion module 13 and the correction module 14 The plurality of environmental monitoring data are automatically or non-automatically calculated to obtain at least one regression reference coefficient. For example, the regression reference coefficient is selected as a linear regression coefficient, a polynomial regression coefficient, or other regression reference coefficients.

Referring to FIG. 1 and FIG. 2 again, the method for correcting the fine aerosol detector of the preferred embodiment of the present invention includes the step S4: then, the single calculation module of the light conversion module 13 and the correction module 14 Using the system parameters, detecting the interference parameters of the light wave, the reference point, the total field maximum value, the mean coefficient and the regression reference coefficient, a correction calculation function is combined, and the calibration calculus is used to correct a fine aerosol measurement value. Obtain a corrected fine aerosol value.

For example, the correction calculation function of the preferred embodiment of the present invention is selected as follows: reference point + (regression reference coefficient * (((basic function) * mean coefficient) - total field maximum value)) where the basic function is the system parameter and A function that detects the interference of light waves.

FIG. 3 is a schematic diagram showing the configuration of the fine aerosol detector calibration system of the first preferred embodiment of the present invention in a portable fine aerosol detector. Please refer to Figure 3, for example, the fine aerosol detector The calibration system 1 is disposed in a portable fine aerosol detector 10 to improve the accuracy of fine aerosol detection.

Figure 4 is a schematic view showing the arrangement of the fine aerosol detector calibration system of the first preferred embodiment of the present invention in an air filter. Referring to FIG. 4, the fine aerosol detector calibration system 1 is disposed in an air filter 100, and the fine aerosol detector calibration system 1 includes an optical detector, and the fine suspension A particle detector calibration system 1 is coupled to the optical detector.

Figure 5 is a block diagram showing a fine aerosol detector calibration system of the second preferred embodiment of the present invention, which corresponds to the fine aerosol detector calibration system 1 of Figure 1. Referring to FIG. 5, with reference to the first embodiment, the fine aerosol detector calibration system 1a of the second preferred embodiment of the present invention further includes a wireless transmitter 2 and a data collector 3, and the wireless The transmitter 2 and the data collector 3 are connected to the single calculus module of the light conversion module 13 and the correction module 14.

Referring to FIG. 5 again, for example, the wireless transmitter 2 can be selected as a WIFI module, a Bluetooth module, an ibeacon module, or other transmission components having similar functions. Similarly, the data collector 3 can also be selected as a data storage device, a smart phone, a computer device, a laptop computer device, A wireless communication device or other device having similar functions.

The foregoing preferred embodiments are merely illustrative of the invention and the technical features thereof, and the techniques of the embodiments can be carried out with various substantial equivalent modifications and/or alternatives; therefore, the scope of the invention is subject to the appended claims. The scope defined by the scope shall prevail. The copyright limitation of this case is used for the purpose of patent application in the Republic of China.

Claims (10)

A fine aerosol detector calibration system includes: a detection light emitter that optically emits a predetermined light to the same gas, and the sample gas contains a plurality of fine aerosols for passing the predetermined light When the fine particles of the sample gas are suspended, the predetermined light is caused to have a scattering, a refractive angle or a reflection angle; and at least one of the dust light detectors is disposed at a predetermined light receiving angle of the detecting light emitter. And the dust light detector is configured to measure the scattering, refraction or reflection of the predetermined light to obtain a light measurement value; and a light conversion module converts the light measurement value into a fine suspension particle measurement And a calibration module coupled to the light conversion module for correcting and calculating the fine aerosol measurement value; wherein the calibration module simultaneously utilizes a system parameter, a detection light wave interference parameter, and a reference Point, a total field maximum value, a mean value coefficient, and a regression reference coefficient are combined to correct the fine aerosol measurement value to obtain a corrected value Aerosols value. The fine aerosol detector calibration system according to claim 1, wherein the detection light emitter is selected as an infrared module, a laser light module or a light emitting diode module. The fine aerosol detector calibration system according to claim 1, wherein the dust detector is selected as a photodiode or a photoelectric crystal. According to the fine aerosol detector calibration system described in claim 1, wherein the light conversion module and the correction module are integrated to form a single calculation module. The fine aerosol detector calibration system of claim 1, wherein the fine aerosol measurement is a fine aerosol concentration or a fine aerosol amount. A fine aerosol detector calibration method includes: selecting an optical detector, wherein the optical detector can obtain the same gas, and the optical detector is adapted to a system parameter and a detection light wave The interference parameter, and the system parameter and the detected light wave interference parameter are a basic correction parameter; a detection light emitter is used to optically emit a predetermined light to the sample gas, and the sample gas comprises several fine aerosols So that when the predetermined light passes through the fine aerosol of the sample gas, the predetermined light is caused to generate a scattering, a refractive angle or a reflection angle; and at least one is disposed opposite to the detection light emitter by the dust light detector. One of the predetermined light receiving angles, and the dust light detector is used to measure the scattering, refraction or reflection of the predetermined light to obtain a light measurement value; using a plurality of environmental monitoring data to find a reference point, a total site The highest value and a mean value coefficient, and the several environmental monitoring data are obtained by actual measurement at several environmental monitoring points; using the several environmental monitoring Performing statistical calculations to obtain at least one regression reference coefficient; and using the system parameters, detecting light wave interference parameters, reference points, total field maximum values, mean coefficients, and regression reference coefficients to jointly correct a fine aerosol measurement value To obtain a corrected fine aerosol value. The method for correcting a fine aerosol detector according to the sixth aspect of the patent application, wherein the detecting light emitter is selected as an infrared module, a laser light module or a light emitting diode module. The fine aerosol detector calibration method according to claim 6, wherein the at least one selected by the dust detector is a photodiode or a photoelectric crystal. The fine aerosol detector calibration method according to claim 6, wherein the regression reference coefficient is selected as a linear regression coefficient, a polynomial regression coefficient or other regression reference coefficients. The fine aerosol detector calibration method according to claim 6, wherein the fine aerosol measurement is a fine aerosol concentration or a fine aerosol amount.