CN112198134A - Portable infrared gas analyzer - Google Patents
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- CN112198134A CN112198134A CN202011089934.9A CN202011089934A CN112198134A CN 112198134 A CN112198134 A CN 112198134A CN 202011089934 A CN202011089934 A CN 202011089934A CN 112198134 A CN112198134 A CN 112198134A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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Abstract
The invention discloses a portable infrared gas analyzer, comprising: the gas detection device comprises a detection device, a power supply device, a display device and an outer shell, wherein the detection device, the power supply device and the display device are used for detecting different gases and are arranged on the outer shell; the detection device comprises an air chamber for containing gas to be detected, an infrared light source for irradiating the gas to be detected, a filter plate, a photoelectric detection device and an inner shell, wherein the photoelectric detection device is used for detecting the intensity of the filtered infrared light source and converting, analyzing and processing light signals, the inner shell is sequentially arranged in the infrared light source, the air chamber, the filter plate and the photoelectric detection device, the air chamber is provided with an air inlet and an air outlet, the air outlet corresponds to the filter plate, and the power supply device and the display device are both connected with the photoelectric detection device. This device both can effectively detect multiple gas concentration, convenient to use again, and this device simple structure is small and exquisite, the cost of manufacture is lower, can adapt to outdoor or indoor multiple application scene.
Description
Technical Field
The invention relates to the technical field of optical detection, in particular to a portable infrared gas analyzer.
Background
With the development of social economy, a large amount of toxic and harmful gases, such as CO and CO, are generated in the production process of people2And methane and the like, and the toxic gases are discharged into the air, so that the air components are changed, and the human body is injured after being inhaled. At present, the commonly used method for detecting toxic gases mainly comprises the following steps: colorimetric method, electrochemical method, electric method, gas chromatography, optical absorption method, and the like. Compared with other gas detection methods, the optical absorption method has the advantages of fast response, good stability, high accuracy and the like, can monitor atmospheric pollution in real time, and is widely applied to atmospheric monitoring.
The optical absorption method is based on the fact that the wavelength of a spectrum absorbed by a gas molecule corresponds to the structural characteristics of the molecule, so that the spectrum absorbed by the gas molecule has a one-to-one correspondence with the gas molecule. For example CO, CO2And asymmetric molecules such as methane and the like have the property of absorbing infrared energy, have fixed absorption wavelength, have uniqueness, are not changed due to the change of conditions such as temperature, humidity and the like, and have the absorption intensity related to the concentration of the gas to be detected. It is based on the above principle that an infrared gas analyzer has been developed. The infrared gas analyzer canThe detection is performed for a certain gas or a plurality of gases. In the prior art, the infrared gas analyzer for detecting various gases is generally a fourier infrared gas analyzer, but the fourier infrared gas analyzer is usually fixed in a laboratory and cannot be carried out for use, and the fourier infrared gas analyzer is expensive and difficult to popularize.
In summary, it is an urgent need to solve the problem of providing a device that can effectively detect a plurality of gases and is convenient to use.
Disclosure of Invention
In view of this, the present invention provides a portable infrared gas analyzer, which can effectively detect the concentration of various gases, and is convenient to use, and the device has simple and small structure, low manufacturing cost, and is suitable for various outdoor or indoor application scenarios, and can be popularized and used.
In order to achieve the above purpose, the invention provides the following technical scheme:
a portable infrared gas analyzer, comprising: the gas detection device comprises a detection device for detecting different gases, a power supply device for driving the detection device to operate, a display device for displaying detection data of the detection device and an outer shell, wherein the detection device, the power supply device and the display device are all arranged on the outer shell;
detection device is including being used for holding the gaseous air chamber of awaiting measuring, being used for shining the gaseous infrared light source of awaiting measuring, being used for according to the filter plate of the gaseous kind selectivity filtration infrared light source wavelength of awaiting measuring, being used for detecting the infrared light source intensity after filtering and carrying out the photoelectric detection device and the interior casing that the analysis was handled of converting to the light signal, infrared light source the air chamber the filter plate and photoelectric detection device locates in proper order interior casing, the air chamber is equipped with inlet port and venthole, the venthole corresponds the filter plate sets up, power supply unit with display device all with photoelectric detection device connects.
Preferably, the infrared light source is a broad-spectrum IR-715EN infrared light source, and the wavelength of the infrared light source is 0-5 μm.
Preferably, the filter includes three infrared narrow-band filters with wavelengths of 3350nm, 4260nm and 4650nm respectively, and the three infrared narrow-band filters are distributed in a triangular shape and can rotate to change positions.
Preferably, the photoelectric detection device comprises a photoelectric detector for converting an optical signal into a weak electric signal and a circuit device connected with the photoelectric detector, wherein the circuit device comprises a back-end circuit for amplifying the weak electric signal and filtering noise waves, a single chip microcomputer for converting the electric signal into a digital signal and analyzing and processing the digital signal, a GPRS wireless transmission device for performing data interaction between the digital signal and the mobile terminal in a wireless transmission mode, and a voltage stabilizing circuit;
the back end circuit, the single chip microcomputer, the GPRS wireless transmission device and the voltage stabilizing circuit are electrically connected in sequence, the circuit device is arranged on a circuit board in a patch mode, the circuit board is arranged above the photoelectric detector, and the power supply device and the display device are connected with the single chip microcomputer.
Preferably, the lower extreme of filter is equipped with rotary encoder, rotary encoder passes through the circuit board with the singlechip is connected.
Preferably, the display device comprises a display screen and/or a mobile terminal, the display screen is arranged on the outer shell, and the display screen is a touch screen provided with a control button plate.
Preferably, the inner casing is a stainless steel component, a layer of insulating plastic skin is wrapped outside the inner casing, the circuit board is arranged on the insulating plastic skin, the photoelectric detector is arranged in the inner casing, and the photoelectric detector is connected with the circuit device through a wire.
Preferably, still including the collection device who is used for collecting gaseous, collection device is including the filter, aspiration pump and the gas-supply pipe that connect gradually, the filter is inside to contain the filter pulp, the inlet end of filter passes the shell body communicates with each other with the external world, the filter give vent to anger the end with the gas-supply pipe intercommunication, the gas-supply pipe with the inlet port intercommunication.
Preferably, the shell body comprises an upper shell body and a lower shell body which are provided with air holes, and the upper shell body is detachably connected with the lower shell body.
Preferably, the power supply device is an aluminum battery charger.
When the portable infrared gas analyzer provided by the invention is used, firstly, the power supply device can be utilized to supply power to the detection device so as to enable the detection device to be in a working state, and then, gas is conveyed into the gas chamber through the gas inlet hole of the gas chamber so as to enable the gas chamber to be filled with gas to be detected. The detection device can emit a stable infrared light source when in a working state, and the infrared light source irradiates the gas to be detected in the gas chamber. At the moment, the filter with the required wavelength is selected, the filter is moved and adjusted to the position of the same horizontal line with the infrared light source, the air chamber and the photoelectric detection device, clutter is effectively filtered, and the infrared light source filtered by the filter reaches the photoelectric detection device. The photoelectric detection device can effectively detect the intensity of the filtering light source and convert, analyze and process the optical signal, namely the photoelectric detection device can convert the optical signal into a weak electrical signal, amplify and filter the electrical signal, analyze and process the detected electrical signal and convert the detected electrical signal into a digital signal, and finally, the photoelectric detection device can transmit the detection data to the display device for displaying so that a user can obtain the detection data.
The device is based on the infrared optical absorption principle, the gas to be detected in the gas chamber is irradiated by the infrared light source with the broad spectrum, the vibration frequency of a certain group in the gas molecule to be detected and the irradiated infrared light frequency are the same and can resonate, the group can absorb the infrared light with the frequency, and the absorption intensity is related to the concentration of the gas. Therefore, according to the gas type detected by the requirement, the infrared light source filtered by the filter is received and detected by the photoelectric detection device by selecting the filter with different wavelengths, so that different gas concentrations can be effectively detected.
In conclusion, the portable infrared gas analyzer provided by the invention can effectively detect the concentration of various gases, is convenient to use, has a simple and small structure, is low in manufacturing cost, can adapt to various outdoor or indoor application scenes, and can be popularized and used.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a portable infrared gas analyzer according to the present invention, with an outer case disassembled.
In fig. 1:
the device comprises a power supply device 1, a display device 2, an outer shell 3, an air chamber 4, an infrared light source 5, a spectroscope 6, a filter 7, an inner shell 8, an air inlet 9, an air outlet 10, a rotary encoder 11, a photoelectric detector 12, a rear-end circuit 13, a single-chip microcomputer 14, a GPRS wireless transmission device 15, a voltage stabilizing circuit 16, a circuit board 17, a filter 18, an air pump 19, an air delivery pipe 20, a fixed column 21, an air hole 22 and a light-transmitting mirror 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a portable infrared gas analyzer which can effectively detect the concentration of various gases and is convenient to use, and the device has simple and small structure and lower manufacturing cost, can adapt to various outdoor or indoor application scenes and can be popularized and used.
Referring to fig. 1, fig. 1 is a schematic structural view of a portable infrared gas analyzer according to the present invention, after an outer casing is disassembled.
This embodiment provides a portable infrared gas analyzer, includes: the gas detection device comprises a detection device for detecting different gases, a power supply device 1 for driving the detection device to operate, a display device 2 for displaying detection data of the detection device and an outer shell 3, wherein the detection device, the power supply device 1 and the display device 2 are all arranged on the outer shell 3; detection device is including being used for holding the gaseous air chamber 4 that awaits measuring, an infrared light source 5 for shining the gaseous infrared light source that awaits measuring, a filter 7 for inciting somebody to action 5 wavelength of gaseous kind selectivity filtration infrared light source according to awaiting measuring, a photoelectric detection device and interior casing 8 for detecting 5 intensity of infrared light source after filtering and carrying out conversion analysis processes to light signal, infrared light source 5, air chamber 4, interior casing 8 is located in proper order to filter 7 and photoelectric detection device, air chamber 4 is equipped with inlet port 9 and venthole 10, venthole 10 corresponds filter 7 and sets up, power supply unit 1 and display device 2 all are connected with photoelectric detection device.
It should be noted that the gas cell 4 may be provided as a box structure composed of a dichroic mirror 6, a lens, and four plastic plates, so that the detection gas does not enter the light source portion and the circuit portion. An air inlet 9 and an air outlet 10 are provided on the box structure to facilitate the flow of air in the air chamber 4. A spectroscope 6 can be arranged on the front side of the air chamber 4, a light-transmitting mirror 23 is arranged on the rear side of the air chamber, and the spectroscope 6 can divide the infrared light source 5 into light with different wavelengths. That is, infrared source 5 and air chamber 4 are separated by spectroscope 6, and air chamber 4 and filter 7 are separated by light-transmitting mirror 23 to filter 7 rear end is equipped with photoelectric detection device, so that infrared source 5's transmission and the illumination condition of observing infrared source 5.
It should be noted that the display device 2 can be installed on the top of the outer casing 3 for the user to observe, and the power supply device 1 and the detection device can be disposed inside the outer casing 3 to avoid the damage of the components.
In the actual application process, according to actual conditions and actual requirements, the shapes, structures, sizes, models, positions and the like of the detection device, the power supply device 1, the display device 2, the outer shell 3, the air chamber 4, the infrared light source 5, the filter plate 7, the photoelectric detection device and the inner shell 8 can be determined.
When the portable infrared gas analyzer provided by the invention is used, firstly, the power supply device 1 can be used for supplying power to the detection device so as to enable the detection device to be in a working state, and then, gas is conveyed into the gas chamber 4 through the gas inlet hole 9 of the gas chamber 4 so as to enable the gas chamber 4 to be filled with gas to be detected. When the detection device is in a working state, the detection device can emit a stable infrared light source 5, and the infrared light source 5 irradiates the gas to be detected in the gas chamber 4. At this moment, by selecting the filter 7 with the required wavelength, the filter 7 is moved and adjusted to the position of the same horizontal line with the infrared light source 5, the air chamber 4 and the photoelectric detection device, so that clutter is effectively filtered, and the infrared light source 5 filtered by the filter 7 reaches the photoelectric detection device. The photoelectric detection device can effectively detect the intensity of the filtering light source and convert, analyze and process the optical signal, namely the photoelectric detection device can convert the optical signal into a weak electrical signal, amplify and filter the electrical signal, analyze and process the detected electrical signal and convert the detected electrical signal into a digital signal, and finally, the photoelectric detection device can transmit the detection data to the display device 2 for displaying so that a user can obtain the detection data.
The device is based on the infrared optical absorption principle, the gas to be detected in the gas chamber 4 is irradiated by the infrared light source 5 with a wide spectrum, the vibration frequency of a certain group in the gas molecule to be detected and the irradiated infrared light frequency are the same and can resonate, the group can absorb the infrared light with the frequency, and the absorption intensity is related to the concentration of the gas. Therefore, according to the gas type to be detected, by selecting the filter 7 with different wavelengths, the infrared light source 5 filtered by the filter 7 is received and detected by the photoelectric detection device, so that different gas concentrations can be effectively detected.
In conclusion, the portable infrared gas analyzer provided by the invention can effectively detect the concentration of various gases, is convenient to use, has a simple and small structure, is low in manufacturing cost, can adapt to various outdoor or indoor application scenes, and can be popularized and used.
Based on the above embodiment, it is preferable that the infrared light source 5 is a broad spectrum IR-715EN infrared light source, and the wavelength of the infrared light source 5 is 0-5 μm, which can be used as CO, CO2、CH4Light sources of, i.e. CO, CO2、CH4The vibration frequency of a certain group is the same as the infrared light frequency, resonance occurs, the group absorbs the infrared light of the frequency, and the absorption intensity is related to the concentration of gas, so that CO and CO can be easily absorbed2、CH4Is effectively detected.
Preferably, the filter 7 includes three infrared narrow-band filters with wavelengths of 3350nm, 4260nm and 4650nm, and the three infrared narrow-band filters are distributed in a triangular shape and can change positions in a rotating manner.
It should be noted that three infrared narrow-band filters with wavelengths of 3350nm, 4260nm and 4650nm are respectively used for CH4、CO2And CO detection, for example, when the infrared narrow-band filter with the wavelength of 3350nm, the infrared light source 5, the gas chamber 4 and the photoelectric detection device are positioned on the same horizontal line, CH can be effectively detected4The concentration of (c).
It should be noted that, three infrared narrow band filters are triangular distribution and rotatable change position, mean to install three infrared narrow band filters respectively at the three summits of runing rest, and three summits present triangular distribution to, can set up the apex angle position to be in the position of same water flat line with infrared light source 5, air chamber 4, photoelectric detection device, also be the filter 7 of apex angle position for the gaseous filter 7 that needs the detection. Therefore, the positions of the three infrared narrow-band filters can be changed and adjusted by rotating the rotating bracket, so that the filter 7 with the required wavelength can be selected according to actual conditions and actual requirements.
On the basis of the above embodiment, preferably, the photodetection device includes a photodetector 12 for converting an optical signal into a weak electrical signal and a circuit device connected to the photodetector 12, where the circuit device includes a back-end circuit 13 for amplifying the weak electrical signal and filtering noise, a single-chip microcomputer 14 for converting the electrical signal into a digital signal and analyzing and processing the digital signal, a GPRS wireless transmission device 15 for performing data interaction between the digital signal and the mobile terminal in a wireless transmission manner, and a voltage stabilizing circuit 16; the rear-end circuit 13, the single chip microcomputer 14, the GPRS wireless transmission device 15 and the voltage stabilizing circuit 16 are electrically connected in sequence, the circuit device is arranged on a circuit board 17 in a patch mode, the circuit board 17 is arranged above the photoelectric detector 12, and the power supply device 1 and the display device 2 are connected with the single chip microcomputer 14.
It should be noted that when the infrared light source 5, the gas chamber 4, the filter 7 and the photodetector 12 are located at the same horizontal line, the detection process can be effectively ensured to be performed smoothly. The photo detector 12 may be provided as a photo diode which detects infrared light having a wavelength between 1 and 4.6 μm and the intensity of the light filtered by the filter 7 and converts the light signal into a weak electrical signal. The single chip 14 includes an ARM processor and an a/D converter, and the a/D converter converts the electrical signal into a digital signal after the ARM processor analyzes and processes the detected data. And the single chip microcomputer 14 is electrically connected with the power supply device 1, the rotary encoder 11 and the display device 2 respectively.
In addition, the GPRS wireless transmission apparatus 15 is mainly used for performing data interaction between digital signals and the mobile terminal through a wireless transmission mode. The main function of the voltage stabilizing circuit 16 is to make the device obtain stable direct current to emit stable infrared light source 5. Furthermore, the back-end circuit 13 may include a filter circuit and an amplifier circuit, the amplifier circuit is mainly used for amplifying the detected electrical signal, and the filter circuit is mainly used for filtering out some noise waves to improve the accuracy of the electrical signal.
Preferably, the lower end of the filter plate 7 is provided with a rotary encoder 11, and the rotary encoder 11 is connected with the single chip microcomputer 14 through a circuit board 17.
The rotary bracket and the rotary encoder 11 may be coaxially disposed, and the rotary encoder 11 may effectively control the rotation of the rotary bracket, and may also effectively detect the rotation of the rotary bracket. And rotary encoder 11 is connected with singlechip 14 through circuit board 17, and the cooperation of three uses to rotatory process is controlled according to actual demand, detects different gas concentration with the filter 7 of selecting different wavelength.
Preferably, the display device 2 includes a display screen and/or a mobile terminal, the display screen is disposed on the outer casing 3, and the display screen is a touch screen provided with a control button board. Therefore, the portable infrared gas analyzer provided by the invention has two modes of display screen control and mobile terminal control, so that the experience of a user can be effectively improved.
The structure, control type, and the like of the display device 2 can be determined in the actual operation process according to actual conditions and actual requirements.
Preferably, the inner housing 8 is made of stainless steel, a layer of insulating plastic is wrapped outside the inner housing 8, the circuit board 17 is arranged on the insulating plastic, the photodetector 12 is arranged in the inner housing 8, and the photodetector 12 and the circuit device are connected through a wire.
It should be noted that, by arranging the circuit board 17 on the insulating plastic skin of the inner housing 8, it is possible to effectively prevent the circuit elements from being influenced by each other due to electric leakage, which is beneficial to improving the service life and the use effect of the device.
On the basis of the above embodiment, preferably, the gas collection device further comprises a collection device for collecting gas, the collection device comprises a filter 18, an air suction pump 19 and an air delivery pipe 20 which are connected in sequence, filter cotton is contained in the filter 18, the air inlet end of the filter 18 penetrates through the outer shell 3 to be communicated with the outside, the air outlet end of the filter 18 is communicated with the air delivery pipe 20, and the air delivery pipe 20 is communicated with the air inlet 9.
It should be noted that, can set up filter 18 into a small barreled transparent structure, it can effectively filter moisture and some particulate matters in the gas that awaits measuring, avoids influencing the accuracy of this device because of dust and steam to improve and detect the precision. In addition, the gas sample to be detected is extracted by the air extracting pump 19, so that the time required for natural diffusion of the gas can be effectively shortened.
In the actual application process, the shapes, structures, sizes, positions, materials and the like of the filter 18, the air pump 19 and the air pipe 20 can be determined according to actual conditions and actual requirements.
Preferably, the outer case 3 includes an upper case and a lower case both provided with the airing holes 22, and the upper case and the lower case are detachably connected. As shown in fig. 1, it is a schematic diagram of the upper shell and the lower shell after being separated.
It should be noted that, both the upper casing and the lower casing may be made of waterproof PVC plastic, so as to effectively protect the components inside the outer casing 3. The upper shell and the lower shell can be connected in a buckling mode so as to be convenient to install and use. For example, fixing posts 21 may be provided around the upper and lower cases, and fixing and detaching operations may be performed by screws matched with the fixing posts 21.
It should be noted that when the components inside the outer casing 3 are damaged, the components can be replaced by disassembling operation, so as to improve the maintenance efficiency of the device and reduce the maintenance cost of the device. And, the upper casing and the lower casing are provided with a plurality of ventilation holes 22 for effectively discharging the detected gas and effectively radiating the device.
In addition to the above embodiments, it is preferable that the power supply device 1 is an aluminum battery charger. For example, the power supply device 1 may be set to an aluminum battery charger of 10000mA, which can directly supply power to the portable infrared gas analyzer and can charge the portable infrared gas analyzer through a USB line. The shape, structure, type, position, etc. of the power supply apparatus 1 can be determined in the actual operation process according to the actual situation and the actual requirement.
To further illustrate the operation of the portable infrared gas analyzer provided by the present invention, an example is provided below.
To illustrate the display screen control mode as an example, a user can click a power key of a control button board on the display screen, and the single chip 14 controls the power supply device 1 to supply power to the detection device, so that the detection device is in a standby state. Then, the air pump 19 is started to pump the gas to be measured processed by the filter 18 into the air pipe 20, and then the gas enters the air chamber 4 through the air inlet 9. The detection device can emit a stable infrared light source 5, and the infrared light source 5 irradiates the gas to be detected in the gas chamber 4 through the spectroscope 6. Meanwhile, the single chip microcomputer 14 controls the rotary encoder 11 to select the filter 7 with the required wavelength, the required filter 7 is rotated to the position of the same horizontal line with the infrared light source 5, the air chamber 4 and the photoelectric detector 12, and clutter is filtered. The infrared light source 5 filtered by the filter 7 reaches the photodetector 12. The photodetector 12 detects the intensity of the filtered light source and converts the light signal into a weak electrical signal, which is then transmitted to the back-end circuit 13 for amplification and filtering. The electrical signal processed by the back-end circuit 13 is transmitted to the single chip microcomputer 14, and after the detection data is analyzed and processed by an ARM processor in the single chip microcomputer 14, the electrical signal is converted into a digital signal by an A/D converter and finally transmitted to a display screen for displaying.
It should be added that the difference between the mobile terminal control and the display screen control is that after the mobile terminal sends a working instruction, the instruction is received by the GPRS wireless transmission device 15, and after the instruction is processed and analyzed by the single chip 14, the portable infrared gas analyzer is started to perform the detection operation. Moreover, after the single chip 14 converts the electrical signal into a digital signal, the digital signal needs to be transmitted to the GPRS wireless transmission device 15, and the GPRS wireless transmission device 15 performs data interaction on the detection data with the mobile terminal in a wireless transmission manner.
It should be noted that the directions and positional relationships indicated by "upper and lower sides", "inside and outside", and the like in the present application are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, and do not indicate or imply that the device or element referred to must have a specific direction, be configured and operated in a specific direction, and thus, should not be construed as limiting the present invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.
The portable infrared gas analyzer provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A portable infrared gas analyzer, comprising: the gas detection device comprises a detection device for detecting different gases, a power supply device (1) for driving the detection device to operate, a display device (2) for displaying detection data of the detection device and an outer shell (3), wherein the detection device, the power supply device (1) and the display device (2) are all arranged on the outer shell (3);
detection device is including being used for holding the gaseous air chamber (4) of awaiting measuring, being used for shining gaseous infrared light source (5) of awaiting measuring, being used for according to the filter plate (7) of the gaseous kind selectivity filtration infrared light source (5) wavelength of awaiting measuring, being used for detecting infrared light source (5) intensity after filtering and carrying out conversion analysis processing's photoelectric detection device and interior casing (8) to light signal, infrared light source (5) air chamber (4) filter plate (7) and photoelectric detection device locates in proper order interior casing (8), air chamber (4) are equipped with inlet port (9) and venthole (10), venthole (10) correspond filter plate (7) set up, power supply unit (1) with display device (2) all with photoelectric detection device connects.
2. The portable infrared gas analyzer of claim 1, characterized in that the infrared light source (5) is a broad spectrum IR-715EN infrared light source, the wavelength of the infrared light source (5) being 0-5 μ ι η.
3. The portable infrared gas analyzer as defined in claim 2, characterized in that said filter (7) comprises three infrared narrow-band filters with wavelengths of 3350nm, 4260nm and 4650nm, respectively, said three filters being triangularly distributed and rotatably variable in position.
4. The portable infrared gas analyzer according to any of the claims 1 to 3, characterized in that the photo-detection means comprises a photo-detector (12) for converting optical signals into weak electrical signals and a circuit arrangement connected to the photo-detector (12), the circuit arrangement comprises a back-end circuit (13) for amplifying weak electrical signals and filtering noise, a single-chip microcomputer (14) for converting electrical signals into digital signals and analyzing and processing the digital signals, a GPRS wireless transmission means (15) for data interaction of digital signals with a mobile terminal by wireless transmission, and a voltage stabilizing circuit (16);
the back-end circuit (13), the single chip microcomputer (14), the GPRS wireless transmission device (15) and the voltage stabilizing circuit (16) are electrically connected in sequence, the circuit device is arranged on a circuit board (17) in a patch mode, the circuit board (17) is arranged above the photoelectric detector (12), and the power supply device (1) and the display device (2) are connected with the single chip microcomputer (14).
5. The portable infrared gas analyzer as claimed in claim 4, characterized in that the lower end of the filter (7) is provided with a rotary encoder (11), and the rotary encoder (11) is connected with the single chip microcomputer (14) through the circuit board (17).
6. The portable infrared gas analyzer as defined in claim 5, characterized in that the display device (2) comprises a display screen and/or a mobile terminal, the display screen is provided on the outer housing (3), the display screen is a touch screen provided with a control button board.
7. The portable infrared gas analyzer as set forth in claim 5, wherein said inner housing (8) is made of stainless steel, said inner housing (8) is covered with a layer of insulating plastic, said circuit board (17) is disposed on said insulating plastic, said photodetector (12) is disposed in said inner housing (8), and said photodetector (12) and said circuit device are connected by a wire.
8. The portable infrared gas analyzer as claimed in any one of claims 1 to 4, further comprising a collecting device for collecting gas, wherein the collecting device comprises a filter (18), a suction pump (19) and a gas pipe (20) which are connected in sequence, the filter (18) contains filter cotton, the gas inlet end of the filter (18) penetrates through the outer shell (3) to be communicated with the outside, the gas outlet end of the filter (18) is communicated with the gas pipe (20), and the gas pipe (20) is communicated with the gas inlet hole (9).
9. The portable infrared gas analyzer as claimed in any of claims 1 to 4, characterized in that the outer case (3) comprises an upper case and a lower case each provided with a vent (22), the upper case and the lower case being detachably connected.
10. The portable infrared gas analyzer as defined in any of claims 1 to 4, characterized in that the power supply device (1) is an aluminum battery charger.
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| CN202011089934.9A CN112198134A (en) | 2020-10-13 | 2020-10-13 | Portable infrared gas analyzer |
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| CN202011089934.9A CN112198134A (en) | 2020-10-13 | 2020-10-13 | Portable infrared gas analyzer |
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Cited By (1)
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|---|---|---|---|---|
| WO2023131334A1 (en) * | 2022-01-10 | 2023-07-13 | 杭州三花研究院有限公司 | Gas detection device |
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