CN216594766U - Expiration formula alcohol detector based on NDIR principle - Google Patents
Expiration formula alcohol detector based on NDIR principle Download PDFInfo
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- CN216594766U CN216594766U CN202220942168.4U CN202220942168U CN216594766U CN 216594766 U CN216594766 U CN 216594766U CN 202220942168 U CN202220942168 U CN 202220942168U CN 216594766 U CN216594766 U CN 216594766U
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Abstract
The utility model discloses an expiration formula alcohol detector based on NDIR principle relates to alcohol detection technical field, and its technical scheme main points are: the device comprises a base, a shell and a detection mechanism arranged in the shell, wherein the shell is fixedly connected with the base through a telescopic rod; the top end of the shell is provided with an expiration groove, and the bottom end of the expiration groove is provided with an air inlet; the detection mechanism comprises a gas path, an absorption gas chamber, an infrared light source and an infrared detector, wherein one end of the gas path is communicated with the gas inlet, and the other end of the gas path is communicated with the absorption gas chamber; the infrared light source and the infrared detector are respectively positioned at two ends of the absorption air chamber; a narrow-band filtering lens for detecting ethanol is arranged between the absorption gas chamber and the infrared detector. Utilize the different principle of the wavelength of different organic substance absorption infrared rays to detect the alcohol concentration in the expired gas, improved alcohol detector's detection precision and life, can adjust length simultaneously, the adaptation large truck driver uses, and simple structure, portable.
Description
Technical Field
The utility model relates to an alcohol detection technical field, more specifically say, it relates to an expiration formula alcohol detector based on NDIR principle.
Background
NDIR (Non-dispersive infra-red sensor) infrared gas sensors use a broad-spectrum light source IR Lamp as the light source of the infrared sensor, and light passes through the gas to be detected in the light path cavity, passes through the narrow-band filter and reaches the infrared detector. The working principle of the gas sensing device is that the absorption characteristics are selected based on the near infrared spectra of different gas molecules, and the gas components are identified and the concentration of the gas components is determined by utilizing the relation (Lambert-Beer law) between the gas concentration and the absorption intensity. Are used primarily for the detection of compounds such as: CH4, CO2, SF6, N2O, CO, SO2, NH3, ethanol, benzene, and the like. The infrared gas sensor utilizing the NDIR principle has the advantages of high precision and sensitivity, good stability and reliability, long service life, strong anti-interference capability and the like.
Currently, the breath alcohol tester is one of the most commonly used alcohol testing instruments. Current expiration formula alcohol tester is at the in-process that uses, and the handheld driver's mouth of aiming at of traffic police, then the driver blows hard and can use, but in use, some large truck drivers are in higher position, and it is troublesome to detect, needs the driver to flame out to get off and detects again, influences detection efficiency, causes the traffic jam easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an expiration formula alcohol detector based on NDIR principle utilizes the different principles of wavelength of different organic substance absorption infrared rays to detect the alcohol concentration in the expired gas, has improved alcohol detector's detection precision and life, can adjust length simultaneously, adapts to the large truck driver and uses, improves detection efficiency to avoid causing the condition of traffic jam, and simple structure, portable.
The above technical purpose of the present invention can be achieved by the following technical solutions: an expiration type alcohol detector based on an NDIR principle comprises a base, a shell and a detection mechanism arranged in the shell, wherein the bottom end of the shell is fixedly connected with the base through a telescopic rod; the top end of the shell is provided with an expiration groove, and the bottom end of the expiration groove is provided with an air inlet; the detection mechanism comprises a gas path, an absorption gas chamber, an infrared light source and an infrared detector, wherein one end of the gas path is communicated with the gas inlet, and the other end of the gas path is communicated with the absorption gas chamber; the infrared light source and the infrared detector are respectively positioned at two ends of the absorption air chamber; and a narrow-band filtering lens for detecting ethanol is arranged between the absorption gas chamber and the infrared detector.
The utility model discloses further set up to: the gas path is characterized in that a mounting groove is formed in the top end of the side wall of the gas path, and a gas flow sensor is fixedly mounted in the mounting groove.
The utility model discloses further set up to: and a touch operation display screen is arranged on the outer surface of the shell.
The utility model discloses further set up to: the outer surface of the shell is in a concave arc shape.
The utility model discloses further set up to: and air outlets are arranged on the absorption air chamber and the shell.
The utility model discloses further set up to: the absorption air chamber, the infrared light source, the infrared detector and the narrow-band filter lens are positioned on the same straight line, and the irradiation direction of the infrared light source and the detection direction of the infrared detector face the absorption air chamber.
To sum up, the utility model discloses following beneficial effect has: the utility model discloses utilize the different principle of the wavelength of different organic substance absorption infrared rays to detect the alcohol concentration in the expired gas, improved alcohol detector's detection precision and life, can adjust length simultaneously, adapt to the driver of large truck and use, improve detection efficiency to avoid causing the condition of traffic jam, and simple structure, portable.
Drawings
Fig. 1 is a front view in an embodiment of the invention;
fig. 2 is a cross-sectional view in an embodiment of the invention.
In the figure: 1. a base; 2. a housing; 3. a telescopic rod; 4. an expiration groove; 5. an air inlet; 6. a gas circuit; 7. an absorption air chamber; 8. an infrared light source; 9. an infrared detector; 10. a narrow band filtering lens; 11. mounting grooves; 12. a gas flow sensor; 13. touch operation of the display screen; 14. and an air outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying fig. 1-2.
The embodiment is as follows: an expiration type alcohol detector based on an NDIR principle is shown in figures 1 and 2 and comprises a base 1, a shell 2 and a detection mechanism arranged in the shell 2, wherein the bottom end of the shell 2 is fixedly connected with the base 1 through a telescopic rod 3; the top end of the shell 2 is provided with an expiration groove 4, and the bottom end of the expiration groove 4 is provided with an air inlet 5; the detection mechanism comprises an air path 6, an absorption air chamber 7, an infrared light source 8 and an infrared detector 9, wherein one end of the air path 6 is communicated with the air inlet 5, and the other end of the air path 6 is communicated with the absorption air chamber 7; the infrared light source 8 and the infrared detector 9 are respectively positioned at two ends of the absorption air chamber 7; a narrow-band filter lens 10 for detecting ethanol is arranged between the absorption gas chamber 7 and the infrared detector 9.
In the embodiment, the telescopic rod 3 is convenient for driving the shell 2 to stretch, so that the length between the shell 2 and the base 1 can be adjusted to adapt to a driver of a large truck at a higher position for use, and the telescopic rod 3 can be a telescopic hollow cylindrical rod made by rolling a metal strip or a plastic sheet or an electric push rod; the exhalation groove 4 is convenient for the testee to exhale, thereby avoiding the use of an exhalation tube; the air inlet 5 is convenient for the air exhaled by the testee to enter the air path 6; the gas path 6 is convenient for transmitting the gas exhaled by the testee to the absorption gas chamber 7; infrared light is emitted to the absorption gas chamber 7 through the infrared light source 8, the infrared light source 8 irradiates the gas to be detected in the absorption gas chamber 7, part of the infrared light is absorbed by the ethanol, the infrared light source 8 filtered by the narrow-band filter lens 10 reaches the infrared detector 9, and the infrared detector 9 detects the intensity of the filtered light source, so that the concentration of the ethanol in the gas is obtained.
The top end of the side wall of the gas circuit 6 is provided with a mounting groove 11, and a gas flow sensor 12 is fixedly mounted in the mounting groove 11.
In the embodiment, the installation of the gas flow sensor 12 is facilitated through the installation groove 11; the gas flow sensor 12 is convenient for monitoring whether the testee exhales normally.
The outer surface of the housing 2 is provided with a touch operation display 13.
In the present embodiment, the display screen 13 is operated by touch, so that the detection result is displayed conveniently.
The outer surface of the shell 2 is in a concave arc shape.
In this embodiment, the outer surface of the housing 2 is in the shape of an inwardly concave arc, which is convenient for the traffic police to hold and carry.
The air outlet 14 is arranged on the absorption air chamber 7 and the shell 2.
In this embodiment, gas is facilitated to exit the device through gas outlet 14.
The absorption air chamber 7, the infrared light source 8, the infrared detector 9 and the narrow-band filter lens 10 are located on the same straight line, and the irradiation direction of the infrared light source 8 and the detection direction of the infrared detector 9 face the absorption air chamber 7.
The working principle is as follows: when the expiration type alcohol detector based on the NDIR principle is used, a tested person puts the lips into the expiration groove 4 for expiration, the expiration groove 4 can wrap the whole lips of the tested person through the sunken expiration port, the exhalation groove 4 is convenient for the testee to exhale, thereby avoiding the use of an exhalation tube, the exhaled air enters the air passage 6 through the air inlet 5, then the gas exhaled by the tested person is transmitted into an absorption gas chamber 7 through a gas path 6, an infrared light source 8 emits infrared light to the absorption gas chamber 7, the infrared light source 8 irradiates the gas to be tested in the absorption gas chamber 7, part of the infrared light is absorbed by ethanol, the infrared light source 8 filtered by a narrow-band filter lens 10 reaches an infrared detector 9, the infrared detector 9 detects the intensity of the filter light source, thereby obtaining the concentration of ethanol in the gas and displaying the detection result in the touch operation display screen 13; when a driver of a large truck at a higher position needs to use the device, the telescopic rod 3 is operated to drive the shell 2 to stretch, the length between the shell 2 and the base 1 is increased, and a traffic police can hold the base 1 by hands to adapt to the driver of the large truck at the higher position to use; through the expiration formula alcohol detector based on NDIR principle of constituteing by base 1, casing 2 and the detection mechanism who installs in casing 2, utilize the different principles of wavelength of different organic substance absorption infrared rays to detect the alcohol concentration in the expired gas, the detection precision and the life of alcohol detector have been improved, length can be adjusted to the while, adapt to the driver of large truck and use, improve detection efficiency, thereby avoid causing the condition of traffic jam, and simple structure, portable.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (6)
1. An expiration type alcohol detector based on NDIR principle is characterized in that: the device comprises a base (1), a shell (2) and a detection mechanism arranged in the shell (2), wherein the bottom end of the shell (2) is fixedly connected with the base (1) through a telescopic rod (3); an expiration groove (4) is formed in the top end of the shell (2), and an air inlet (5) is formed in the bottom end of the expiration groove (4); the detection mechanism comprises a gas path (6), an absorption gas chamber (7), an infrared light source (8) and an infrared detector (9), one end of the gas path (6) is communicated with the gas inlet (5), and the other end of the gas path (6) is communicated with the absorption gas chamber (7); the infrared light source (8) and the infrared detector (9) are respectively positioned at two ends of the absorption air chamber (7); a narrow-band filter lens (10) for detecting ethanol is arranged between the absorption air chamber (7) and the infrared detector (9).
2. The NDIR-based breath alcohol detector of claim 1, wherein: the gas circuit is characterized in that a mounting groove (11) is formed in the top end of the side wall of the gas circuit (6), and a gas flow sensor (12) is fixedly mounted in the mounting groove (11).
3. The NDIR-based breath alcohol detector of claim 1, wherein: and a touch operation display screen (13) is arranged on the outer surface of the shell (2).
4. The NDIR-based breath alcohol detector of claim 1, wherein: the outer surface of the shell (2) is in a concave arc shape.
5. The NDIR-based breath alcohol detector of claim 1, wherein: and air outlets (14) are arranged on the absorption air chamber (7) and the shell (2).
6. The NDIR-based breath alcohol detector of claim 1, wherein: the absorption air chamber (7), the infrared light source (8), the infrared detector (9) and the narrow-band filter lens (10) are located on the same straight line, and the irradiation direction of the infrared light source (8) and the detection direction of the infrared detector (9) face the absorption air chamber (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942168.4U CN216594766U (en) | 2022-04-22 | 2022-04-22 | Expiration formula alcohol detector based on NDIR principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942168.4U CN216594766U (en) | 2022-04-22 | 2022-04-22 | Expiration formula alcohol detector based on NDIR principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216594766U true CN216594766U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220942168.4U Active CN216594766U (en) | 2022-04-22 | 2022-04-22 | Expiration formula alcohol detector based on NDIR principle |
Country Status (1)
| Country | Link |
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| CN (1) | CN216594766U (en) |
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2022
- 2022-04-22 CN CN202220942168.4U patent/CN216594766U/en active Active
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