System for wavelength spectral analysis for gas identification using treated tape

FIELD: instrumentation.

SUBSTANCE: invention relates to the field of gases identification and refers to a spectral analysis system for gases identification using a treated tape. The system includes a treated tape, an adjustable colour source, a photodiode, a colour identification sensor and a microprocessor. The adjustable colour source emits radiation in the direction of the treated tape with multiple varied wavelengths. The photodiode measures the radiation reflected from the treated tape. The microprocessor analyses the measurement results and, proceeding from the colour identified and the colour spot intensity, identifies the type and concentration of the gas the treated tape has been exposed to. Additionally, the microprocessor, with the help of the colour identification sensor, controls the radiation wavelength of the adjustable colour source and, whenever required, corrects the colour source radiation.

EFFECT: technical effect consists in increased sensitivity and ensuring the possibility of different type gases detection.

13 cl, 2 dwg

 

The present invention relates generally to the detection of gas. More precisely, the present invention relates to gas detection of many types using source adjustable colors and analysis of wave spectrum.

Background of invention

From techniques known detectors of the presence of gas using the processed tape for measuring gas. For example, some detectors of the presence of gas using the processed tape capable of detecting low concentration gas, which comes into contact with the tape.

In known detectors of the presence of gas processed tape may contain chemically treated paper that reacts to the desired flow of gas, for example, from the system sampling inside the detector gas. Processed tape capable of responding to the gas flow, changing color in the place in which the desired gas is in contact with the tape.

The desired gas of various types can cause the formation of different color patches on the ribbon. Similarly, different concentrations of the desired gas is able to change the color of the spot on the tape. For example, when a higher concentration of the desired gas is formed more saturated color stain.

Known detectors of the presence of gas using the processed tape to measure the concentrations of gases have a built-in LED. The LED may have a graded intensity and capable of acting as a light source directed onto the tape. The light reflected from the tape, and any color spots on it can be recorded by the photodiode. So, can be measured saturation spots, and to determine the concentration of the desired gas.

In some known detectors of the presence of gas using the processed tapes are used only single LED. The presence of gas detectors with single LED have high sensitivity to the spots of the same color, caused by gas of a particular type. In other words, the presence of gas detectors with single LED have high sensitivity, detecting a type of gas, as the wavelength of the LED is calibrated per the specific color which is painted the tape under the action of a gas of a particular type. However, these detectors presence of gas with single LEDs have reduced and / or minimum sensitivity to the color patches formed under the action of gas of other types. Thus, the presence of gas detectors with single LEDs have a low sensitivity for gas detection of many types.

Thus, the constant need for the presence of gas detectors for gas detection of many types. In these detec is the ora of the presence of the gas source is used preferably adjustable colors and analysis of wave spectrum.

Brief description of drawings

Figure 1 shows a block diagram of a system according to the present invention, and figure 2 shows the block diagram of the method according to the present invention.

Detailed description

Although the present invention can be embodied in many different forms, illustrated in the drawings and hereinafter described in detail specific variations in its implementation, it is understood that the above description should be considered as an explanation on the example of the principles of the invention. It is not intended to limit the invention to the specific illustrated variants of implementation.

In embodiments implementing the present invention proposed detectors presence of gas for gas detection of many types using source adjustable colors and analysis of wave spectrum. In embodiments implementing the present invention can be adjusted wavelength and intensity of the source of an adjustable color, and the light source adjustable color can be directed to the treated tape. With the help of the photodiode may be logged reflection from the processed tape, and with the help of a microprocessor can be analyzed applying the photodiode to determine the type and concentration of gas, which affected the tape.

For example, a source of regulated C the ETA according to the present invention may contain LEDs with RGB (red-green-blue) colour of light. Source adjustable color according to the present invention may also contain a separate red LED, green LED and blue LED.

Source adjustable color can be controlled by a microprocessor, which adjusts the total radiation emitted by the source, in accordance with the desired wave length. For example, the intensity of each of the source elements, including elements of red, green, and blue glow can be adjusted in order to achieve the total radiation at the desired wave length. In embodiments implementing the present invention, the microprocessor can control the source to ensure separate or simultaneous radiation of each of the many waves of desired lengths in the spectrum.

In embodiments implementing the present invention, the wavelength of the radiation source can be adjusted in accordance with the waves of desired lengths throughout the spectrum, for example, radiation in the visible part of the spectrum. In some embodiments, implementation of the microprocessor can adjust the wavelength of the source adjustable color from about 450 nm to about 650 nm. After the wavelength of the radiation source is adjusted in accordance with each of the waves of desired lengths throughout the desired range of colors, the source generates a color scan.

The fit is accordance with the present invention the radiation source is adjustable colors capable of acting as a light source and can be directed to the treated tape. With the help of the photodiode may be logged reflection from the processed tape and any stain on it. In some embodiments, the implementation with the help of the photodiode can be measured wavelength and the intensity of the reflected radiation.

Photodiode capable of measuring reflected radiation when adjusting the wavelength of the source throughout the spectrum. Thus, the photodiode is capable of many dimensions, corresponding to the set wavelength of the source radiation throughout the spectrum.

After the microprocessor receives the indications of the photodiode, it can analyze the scanned spectrum to determine the color of the spot on the tape, as well as the intensity of the color spots. Based on the results of this analysis, the microprocessor can determine the type of gas, the impact of which has been processed tape. In some embodiments, implementation of the microprocessor can determine the gas concentration, the impact of which was subjected to tape. Accordingly, proposed in the present invention systems and methods can detect the presence of gases of different types without loss of sensitivity to gas any particular type.

To determine the type of gas, the impact of which has been processed tape, as proposed in the present invention, the systems and methods may mouth the installed wavelength in the spectrum, which source has the highest sensitivity to the tape and any color stain on it. In some embodiments, the implementation of the gas concentration, the impact of which was subjected to a tape, can also be determined by setting the wavelength at which the source has the greatest sensitivity.

To establish the wavelength at which the source has the greatest sensitivity, the systems and methods according to the present invention can be carried out analysis of the measurement results received from the photodiode. For example, in some embodiments, implementation of systems and methods according to the present invention can be implemented fast Fourier transform (FFT) of the photodiode readings in the frequency domain. The result of the FFT may indicate the wavelength at which the source is most sensitive to the color stain appeared under the action of gas.

Once installed, the wavelength that provides the greatest sensitivity, as proposed in the present invention, the systems and methods may determine the appropriate color and intensity of the spots on the treated tape. Then, as proposed in the present invention, the systems and methods may determine the type and concentration of the gas, the impact of which was subjected to tape. For example, proposed in this image is the situation the systems and methods can be used cross-reference table, so, based on the specified wavelength, to determine the appropriate color and intensity of the spots, as well as the appropriate type and concentration of gas that caused the formation of spots.

In the variants of implementation, in which the regulated source contains color RGB LED light, the wavelength of light RGB LED light can be adjusted by controlling the wavelength of each of the elements of red, green and blue glow. For example, can be regulated to a current flowing through each of the navigation elements of red, green and blue glow with the aim of changing the intensity of each element. In the scattering of waves emitted from three transitions may vary, the total radiation RGB LED glow.

In systems and methods according to the present invention may be checked whether the actual radiation source adjustable color desired radiation source. In other words, the systems and methods can be checked whether the actual wavelength and the intensity of the radiation emitted by the source, the desired wavelength and intensity of radiation. For example, in some embodiments, the implementation of the desired wavelength of radiation can be compared with the excitation current in the LED with optical parameter stored in the microprocessor. In some embodiments, implementation is omashu sensor for determining the color of an object can be measured in the actual optical radiation source of the red, green and blue light, and can be calculated combination of wavelength and intensity of the radiation source.

In some embodiments, the actual radiation source can be checked by measuring the current and voltage drop for each of each of the elements of red, green and blue glow. Then can be measured radiation actually emitted by the source, and can be measured wavelength and intensity of the actual radiation source.

When the actual radiation does not correspond to the desired radiation, the systems and methods according to the present invention may be regulated by the intensity of each of the elements of red, green and blue glow. For example, the systems and methods according to the present invention may diminish the emission of any of the elements of red, green and blue glow to attenuate the radiation source.

In some embodiments, the exercise may decrease the tolerance on the optical characteristics of the source. For example, the source can be measured temperature, and the microprocessor can compensate for the deviation of the characteristic of the optical radiation under the influence of temperature.

In some embodiments, the implementation proposed in the present invention, the systems and methods instead of a source of an adjustable color can be used as a source of the radiation is white. In these cases the implementation can use the discovery tool adjustable color such as a color filter or the camera.

Figure 1 illustrates the block diagram of system 100 according to the present invention. As shown in figure 1, the system 100 may include a microprocessor, a source 120 adjustable color sensor 130 to determine the color of an object processed tape photodiode 140 and 150. In some embodiments, implementation of the present invention, the source 120 adjustable color may contain RGB LED glow. In some embodiments, implementation of the present invention, any or some of the following: a microprocessor, a source 120 adjustable color sensor 130 to determine the color of an object processed tape photodiode 140 and 150 may be placed in the housing 160.

The microprocessor can contain executable software 112 management system stored on a non-transitive, computer-readable media known to specialists in this field of technology. The microprocessor 110 may also include a memory 114. In some embodiments, the implementation of the memory 114 may be an internal database, and in some embodiments, the implementation of the memory 114 may be an external database, access to which is capable microprocessor.

The microprocessor 110 can control the source 120 is Guliyeva colors to regulate the wavelength of the source 120 throughout the spectrum. In other words, the microprocessor can control the source 120 so that the source of the emitted radiation on the waves of a variety of desired lengths within the spectrum. In some embodiments, implementation of the microprocessor can adjust the wavelength of the source 120 within the visible part of the spectrum. In some embodiments, implementation of the microprocessor 110 may sequentially or simultaneously to radiate waves of different lengths.

The sensor 130 to determine the color of an object can receive and measure radiation emitted by the source 120. Then the sensor 130 to determine the color of an object can transmit the measurement results of radiation to the microprocessor 110, which may determine whether the wavelength of the radiation actually emitted by the source 120, the desired wavelength of the source. If desired wavelength and the actual wavelength does not match, the microprocessor can adjust the source 120 to achieve compliance.

Processed tape 140 may be exposed to gas. For example, the processed tape 140 may be exposed to ambient air, or processed the tape may be exposed to airflow generated by the exhaust system. It is implied that the present invention is not limited to the manner in which the tape the impact of air or gas.

When processed tape 140 is exposed to the air, contained gases can cause spots on the tape 140. Various gases can cause different color patches, and various concentrations of the gas to cause stains with different levels of intensity.

The radiation emitted by the source may be directed onto the treated tape 140 and the photodiode 150 may measure the reflected ribbon 140 radiation. The photodiode 150 may also measure the radiation reflected any color spots on the tape 140. Thus, the photodiode 150 may measure any radiation reflected from the tape 140, and to detect any color spots on the ribbon 140 regardless of their color or intensity.

The measurement results received by the photodiode 150 may be transmitted to the microprocessor 110, which can analyze these results to determine the type and concentration of gas, the impact of which was subjected to tape 140.

Figure 2 shows a block diagram of a method 200 according to the present invention. In embodiments implementing the present invention, the method 200 may perform a microprocessor, such as microprocessor, shown in figure 1.

The method 200 allows you to determine at step 210, whether formed a color scan. In accordance with the present invention a color scan is generated when the source IP is has uscal radiation at each of the waves of the desired length within range.

If color scanning image is not formed, in step 215 can be selected as follows wavelength and intensity of the desired color light. Then in step 220 can be adjusted by the intensity of the element R/G/B (red/green/blue) glow order to adjust the wavelength of the radiation source to the desired wavelength and intensity. After these adjustments, the element R/G/B glow in step 225 can be measured current and voltage. At step 230 may register the intensity of the R/G/B glow, and at step 235 can be calculated actual wavelength and intensity of radiation.

In step 240 of the method 200 may determine whether the emission color of the desired color 240. If not, in step 220 of the method can again be adjusted to the intensity of the element R/G/B glow in step 225 may again be measured current and voltage of the element R/G/B glow in step 230 may re-register the intensity of the R/G/B glow, and at step 235 again calculates an actual wavelength and intensity of radiation.

If at step 240 it is set that the color of the radiation corresponds to the desired color, in step 245 measure radiation photodiode. Then in step 210 of method 200 may again be determined, whether formed color scan.

If at step 210 it is set that the color scan is generated, at step 250 of method 00 can be carried out the data analysis. In step 255 may be determined by the most sensitive wavelength, and at step 260 may determine the color of the spots on the treated tape. Finally, at step 265 may determine the type and concentration of the gas.

Although the above was described in detail several embodiments, there may be other varieties. For example, in the flowchart presented on the drawings, to achieve the desired results is optional shows the specific order or sequence of steps. Can be provided by other steps, or describes the block diagram may be omitted steps, and in the described system can be added to other components or they may be excluded components. Other choices are possible implementation that does not extend beyond the limits of the following next of the claims.

It follows from the above that may be offered numerous variations and modifications that do not fall within the substantive scope of the invention.

Understood that the invention is not limited to the specific illustrated in the it system or method. Of course, that all such modifications are protected by the attached claims, if they are within the scope and merits of the claims.

1. The system spectral analysis of the wavelength for the determination of gases by using the processed tape, with the holding:
source adjustable color emitting the first radiation in the direction of the processed tape, the control source for the emission of radiation at each of a large number of desired wavelengths within the spectrum is carried out by the microprocessor;
a sensor for detecting the color of an object, receiving the radiation emitted by the source adjustable color;
photodiode measuring the second radiation reflected from the treated tape;
the microprocessor analyzes the measurement results received from the photodiode to determine the maximum wavelength from a set of desired wavelengths, and determining the color and intensity of color spots on the treated tape, based on the maximum wavelength; and
from measurements of the second radiation, the microprocessor compares the wavelength of the radiation received by the sensor to determine the color of an object with the desired wavelength of the source, and, if they do not match, the microprocessor adjusts the source.

2. The system according to claim 1, in which the processed tape contains chemically treated paper.

3. The system according to claim 1, in which the source of an adjustable color contains RGB LED glow.

4. The system according to claim 1, in which the source of an adjustable color contains red LED, green LED and blue LED.

5. The system according to claim 1, in which the source of an adjustable color contains the source of the IR white.

6. The system according to claim 1, in which the microprocessor controls the source of an adjustable color so that it gave off radiation at each of many different wavelengths.

7. The system according to claim 1, in which the spectrum contains visible part of the spectrum of radiation.

8. The system according to claim 1, in which the photodiode responds to the wavelength and the intensity of the second radiation.

9. The system according to claim 1, in which the photodiode measures the second radiation, when the source starts radiation on another wave of desired length from the many waves of desired lengths.

10. The system according to claim 1, in which the processor performs fast Fourier transform with the results of measurements coming from the photodiode to determine the maximum wavelength.

11. The system of claim 10, in which the maximum wavelength corresponds to the wavelength of the many waves of different desired lengths, which is the most sensitive spots on the treated tape.

12. The system according to claim 1, in which the processor determines the type of gas, the impact of which has been processed tape on the basis of a certain color color spots.

13. System according to clause 12, in which the microprocessor determines the gas concentration, the impact of which has been processed tape, based on the determined intensity of the color spot.



 

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