Detection device based on non-contact measurement of alcohol concentration

Abstract

The utility model provides a detection device based on non-contact measurement of alcohol concentration. The detection device comprises a light source generation module, an integrated optical U-shaped table, a photoelectric detection module, an IV conversion module, a signal processing terminal and a temperature detector, the light source generation module and the photoelectric detection module are installed at the two ends of the integrated optical U-shaped table. The photoelectric detection module is used for converting an optical signal into a current signal; the signal processing terminal is connected with the photoelectric detection module through the IV conversion module; the IV conversion module converts the current signal into a voltage signal; the temperature detector is placed in the middle of the integrated optical U-shaped table; by applying the technical scheme, the coaxial integrated optical path design can be realized, and the detection sensitivity is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to photoelectric detection technical field, especially a detection device based on non -contact type measurement alcohol concentration. BACKGROUND

[0002] The alcohol is widely used in food, chemical, medical and other industries at present. The alcohol concentration is an important index in the production process of the white spirit or the experiment related to the white spirit production. Rapid and accurate determination of alcohol content has important significance for many fields. The measurement method is divided into contact type and non -contact type two ways. The typical contact type alcohol measuring equipment is usually refractometer, densimeter etc. The refractometer passes through the light line and transmits the sample to be measured, compares the relative position of the sample and the sample, obtains the refractive index of the alcohol sample, and thus can indirectly calibrate the concentration of alcohol. However, the traditional refractometer method needs complex equipment structure, and the cost is high. Each time when using, the prism needs to be wiped and kept clean, and the test process is more complicated. The densimeter is usually according to the different alcohol concentration of different concentration, and the specific gravity is different. According to the relationship between concentration and buoyancy, the alcohol concentration is calculated. The traditional measurement method needs to be in direct contact with alcohol, needs to consume a certain amount of sample, and the precision is not high, which can not meet the actual demand.

[0003] The typical non -contact type alcohol measuring method has spectral analysis method, and the measurement precision is high, but the spectrometer is expensive, and a large amount of cost needs to be invested for market application. Therefore, the alcohol concentration measuring instrument with non -contact type, low cost, fast detection speed and high precision has important significance. It can avoid direct contact with the material, so as to avoid interference on the measurement result, so that the measurement of alcohol concentration is more convenient, safe and accurate.

[0004] The existing non -contact type usually adopts spectral analysis method and infrared absorption method, and the process of coaxial light source and light detector is more complex, the photosensitive surface of light detector is small, the process of coaxial alignment of the center point of light emitted by light source and the photosensitive surface of detector is more complicated, the traditional fixing method of optical clamp separates the light source and the detector, and cannot form an integrated structure. Therefore, when moving or needing to adjust or replace the light source or detector, it is necessary to re -align, and the mobile device is easy to shake. UTILITY MODEL CONTENT

[0005] Therefore, the utility model aims at providing a detection device based on non -contact type measurement alcohol concentration, realizing coaxial integrated optical path design, and improving detection sensitivity.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a detection device based on non-contact type measurement alcohol concentration, including light source generating module, integrated optical U type platform, photoelectric detection module, IV conversion module, signal processing terminal and temperature detector, light source generating module and photoelectric detection module are installed in both ends of integrated optical U type platform, photoelectric detection module is used to convert light signal into current signal, signal processing terminal and photoelectric detection module are connected through IV conversion module, IV conversion module converts current signal into voltage signal, and the temperature detector is placed in the middle position of integrated optical U type platform.

[0007] In a preferred embodiment, the light source generating module emits a broadband light source, a DFB light source or an FP light source.

[0008] In a preferred embodiment, the light source generating module emits a broadband light source, a DFB light source or an FP light source.

[0009] In a preferred embodiment, the U-shaped two sides of the integrated optical U-shaped platform are respectively provided with a first metal piece (22) and a second metal piece (23), and further include a third metal piece (21) and a fourth metal piece (24); the first metal piece (22) is connected to the third metal piece (21) in correspondence, and the second metal piece (23) is connected to the fourth metal piece (24) in correspondence.

[0010] In a preferred embodiment, the first metal piece (22), the second metal piece (23), the third metal piece (21) and the fourth metal piece (24) each include four connecting holes and one middle hole; the connecting holes are arranged in rotational symmetry with the middle hole as the center;

[0011] In a preferred embodiment, further including a plurality of metal struts; the connecting holes of the first metal piece (22) and the third metal piece (21) connect the metal struts so that the first metal piece (22) and the third metal piece (21) are connected; the connecting holes of the second metal piece (23) and the fourth metal piece (24) connect the metal struts so that the second metal piece (23) and the fourth metal piece (24) are connected.

[0012] In a preferred embodiment, the middle region of the integrated optical U-shaped platform is a sample placement region.

[0013] In a preferred embodiment, the photoelectric detection module includes an infrared photoelectric detector, and the detection wavelength of the infrared photoelectric detector is 800-1700nm.

[0014] In a preferred embodiment, the light source generating module is connected to one side of the integrated optical U-shaped table through a first metal piece (22), and the infrared photoelectric detector is connected to the other side of the integrated optical U-shaped table through a fourth metal piece (24); the light source generated by the light source generating module is on the same horizontal line with the central axis of the infrared photoelectric detector.

[0015] In a preferred embodiment, the temperature detector is used to monitor the internal temperature of the measuring device.

[0016] Compared with the prior art, the non-contact alcohol concentration measuring device has the advantages that the non-contact alcohol concentration measuring device can realize non-contact measurement of alcohol concentration and high-precision and high-stability measurement. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 The circuit principle diagram of the preferred embodiment of the utility model;

[0018] Fig. 2 The integrated optical U-shaped table structure schematic diagram of the preferred embodiment of the utility model;

[0019] Fig. 3 The polynomial fitting analysis diagram of the preferred embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings and embodiments.

[0021] It should be noted that the following detailed description is all exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs.

[0022] It should be noted that the terms used herein are only for the purpose of describing the specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0023] A detection device based on non-contact measurement of alcohol concentration, referring to Figs. 1-3The application relates to a kind of optical fiber temperature sensor systems, including light source generation module, integrated optical U-shaped table, photoelectric detection module, IV conversion module, signal processing terminal and temperature detector; the light source generation module and photoelectric detection module are installed at the two ends of integrated optical U-shaped table; the photoelectric detection module is used to convert optical signal into current signal; the signal processing terminal is connected with the photoelectric detection module through the IV conversion module; the IV conversion module converts current signal into voltage signal; the temperature detector is placed in the middle position of integrated optical U-shaped table.

[0024] The light source generated by the light source generation module is a broadband light source, a DFB light source or an FP light source. The light source generation module is a C-band ASE broadband light source micro module, a 1550nm wavelength point laser or a 1310nm wavelength point laser or a 1450nm wavelength point laser.

[0025] The wavelength of the light source generated by the light source generation module is 1450nm, 1310nm or 1550nm.

[0026] The U-shaped table is provided with a first metal piece 22 and a second metal piece 23 on the two sides of the U-shaped table; a third metal piece 21 and a fourth metal piece 24 are further included; the first metal piece 22 is connected with the third metal piece 21, and the second metal piece 23 is connected with the fourth metal piece 24.

[0027] The first metal piece 22, the second metal piece 23, the third metal piece 21 and the fourth metal piece 24 all include four connecting holes and one middle hole; the connecting holes are rotationally symmetrically arranged around the middle hole.

[0028] A plurality of metal supporting rods are further included; the connecting holes of the first metal piece 22 and the third metal piece 21 are connected with the metal supporting rods, so that the first metal piece 22 and the third metal piece 21 are connected; the connecting holes of the second metal piece 23 and the fourth metal piece 24 are connected with the metal supporting rods, so that the second metal piece 23 and the fourth metal piece 24 are connected. The metal supporting rods are used for adjusting the optical path.

[0029] The middle region of the integrated optical U-shaped table is a sample placement region.

[0030] The photoelectric detection module includes an infrared photodetector, and the detection wavelength of the infrared photodetector is 800-1700nm. The detection material of the photoelectric detection module is indium gallium arsenide.

[0031] The light source generating module is connected to one side of the integrated optical U-shaped table through a first metal piece 22, and the infrared photoelectric detector is connected to the other side of the integrated optical U-shaped table through a fourth metal piece 24; the light source generated by the light source generating module is on the same horizontal line as the central axis of the infrared photoelectric detector. The light source generated by the light source generating module and the central axis of the photoelectric detection module can be manually adjusted through the metal support rod.

[0032] The temperature detector is used to monitor the internal temperature of the measuring device. The signal processing terminal can be a mobile phone, a window screen or a computer.

[0033] The principle of nondestructive measurement of alcohol concentration is as follows:

[0034] When light waves pass through a medium, part of them are absorbed and scattered by the medium, and the rest continue to move forward in the original direction of propagation. According to the Lambert-Beer law, the absorption coefficient of light, the concentration of the substance, and the length of the absorbing medium satisfy:

[0035] (1)

[0036] In the above formula (1), is the intensity of the incident monochromatic light; is the intensity of the transmitted light; is the optical path length; is the concentration of the absorbing substance; is the molar absorption coefficient of the absorbing substance.

[0037] After transforming the relationship, the absorption ratio is obtained :

[0038] (2)

[0039] For a given container containing a specific alcohol, and is a constant. At this time, the absorption ratio is only related to the alcohol concentration, and by taking the logarithm of both sides, the functional relationship can be obtained. In this way, the function can be obtained by fitting, which is theoretically feasible. Since water molecules have light absorption effect in the infrared band, the degree of light absorption by alcohol mixed with water of different concentrations is different, resulting in different light intensities obtained by the photoelectric detection module, thereby causing changes in the electrical signal. By detecting the change of the electrical signal, the concentration of alcohol can be obtained.

[0040] Through experiments, different concentrations of anhydrous ethanol were selected for testing, and multiple polynomial fittings were performed to observe the law. Finally, multiple tests were performed within a few days, and the stability and accuracy of the equipment were continuously optimized. As shown in Fig. 3 , the linear fitting effect of the sensitivity of the device to alcohol is good.

Claims

1. A detection device for measuring alcohol concentration based on non-contact measurement, characterized in that The application relates to a light source generating module, an integrated optical U-shaped table, a photoelectric detection module, an IV conversion module, a signal processing terminal and a temperature detector; the light source generating module and the photoelectric detection module are installed at two ends of the integrated optical U-shaped table; the photoelectric detection module is used for converting light signals into current signals; the signal processing terminal is connected with the photoelectric detection module through the IV conversion module; the IV conversion module converts the current signals into voltage signals; and the temperature detector is placed in the middle position of the integrated optical U-shaped table.

2. The detection device based on non-contact measurement of alcohol concentration according to claim 1, characterized in that, The light source generating module emits a broadband light source, a DFB light source or an FP light source.

3. The device according to claim 1, wherein The wavelength of the light source emitted by the light source generating module is 1450nm, 1310nm or 1550nm.

4. The detection device based on non-contact measurement of alcohol concentration according to claim 1, characterized in that, The U-shaped table is provided with a first metal piece (22) and a second metal piece (23) on two sides of the U-shaped table; the U-shaped table is further provided with a third metal piece (21) and a fourth metal piece (24); the first metal piece (22) is connected with the third metal piece (21) in correspondence, and the second metal piece (23) is connected with the fourth metal piece (24) in correspondence.

5. The device for detecting alcohol concentration based on non-contact measurement according to claim 4, characterized in that, The first metal piece (22), the second metal piece (23), the third metal piece (21) and the fourth metal piece (24) all comprise four connecting holes and one middle hole; the connecting holes are rotationally symmetrically arranged around the middle hole.

6. The detection device based on non-contact measurement of alcohol concentration according to claim 5, characterized in that, The first metal piece (22) and the third metal piece (21) are connected through the connecting holes and the metal supporting rods, and the second metal piece (23) and the fourth metal piece (24) are connected through the connecting holes and the metal supporting rods.

7. The device according to claim 1, wherein The middle region of the integrated optical U-shaped table is a sample placing region.

8. The detection device based on non-contact measurement of alcohol concentration according to claim 7, characterized in that, The photoelectric detection module comprises an infrared photoelectric detector, and the detection wavelength of the infrared photoelectric detector is 800-1700nm.

9. The device according to claim 8, wherein The light source generating module is connected to one side of the integrated optical U-shaped table through the first metal piece (22), and the infrared photoelectric detector is connected to the other side of the integrated optical U-shaped table through the fourth metal piece (24); the center axis of the light source and the center axis of the infrared photoelectric detector are located on the same horizontal line.

10. The device according to claim 1, wherein The temperature detector is used for monitoring the internal temperature of the measuring device.

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