Portable near-infrared spectrometer

Abstract

The utility model discloses a portable near-infrared spectrometer comprising a housing, the upper surface of the housing comprises a touch switch and an upper detection hole, and the lower surface of the housing comprises a lower detection hole; the integrating sphere is mounted in the shell, is positioned at the front part of the spectrometer, is spherical and is internally provided with a hollow diffuse reflection space, and an illumination hole, a signal hole, an upper measurement hole and a lower measurement hole are formed in the sphere; the light emitter is arranged in the shell, is connected with the integrating sphere and emits near-infrared light into the integrating sphere through the integrating sphere illumination hole; the fixing plate is arranged in the shell, is positioned behind the integrating sphere and is used for fixing the spectrum sensor and the main control board; the main control board is installed in the shell, located behind the fixing plate and electrically connected with the light emitter, the touch switch and the power supply; the spectrum sensor is installed in the shell and located behind the main control board; and the power supply is arranged in the shell, is positioned behind the main control board and at the tail part of the spectrograph, and is electrically connected with the main control board.

Description

TECHNICAL FIELD

[0001] The utility model relates to near infrared spectrometer technical field more specifically relates to a portable near infrared spectrometer. BACKGROUND

[0002] With the rapid development of science and technology, the spectral analysis technology has been widely used in food safety detection, drug quality control, environmental monitoring, industrial production process monitoring and on-site emergency detection and other fields due to its rapid, non-destructive and accurate characteristics. Among them, the near infrared spectroscopy (NIRS) has outstanding performance in real-time, online and on-site detection due to its simple operation, rapid response and no need of chemical reagents.

[0003] However, the traditional near infrared spectrometer has complex and precise optical and mechanical design. The core working principle of such instrument is based on the absorption characteristics of molecules in a specific near infrared wave band, and the chemical components in the sample are identified and quantified by analyzing the absorption spectrum of the sample to near infrared light.

[0004] In order to achieve this goal, the traditional near infrared spectrometer must contain a powerful light source for generating near infrared light covering the required wavelength range; then, the light beam needs to pass through a complex optical system, such as Michelson interferometer or grating spectrometer, which not only occupies a large space, but also requires high mechanical precision to ensure spectral resolution.

[0005] In addition, in order to capture and analyze these spectral data, the instrument also needs to be equipped with a large detector and corresponding cooling system, as well as electronic equipment for data processing. All these components work together to make the traditional near infrared spectrometer not only bulky, but also heavy and expensive. But it is these precise structures that guarantee the high sensitivity and analysis accuracy of the instrument. The problem that follows is that such instruments can only be fixedly installed, which cannot meet the needs of on-site mobile detection and field operation.

[0006] In addition, its complex optical structure and high requirement for the use environment limit its application possibility in many complex scenes. With the development of technology, especially the progress of micro-electromechanical technology and integrated optical technology, the instrument size can be minimized while retaining the high-performance analysis capability of traditional instruments. CONTENT OF THE UTILITY MODEL

[0007] The utility model aims at providing a portable near infrared spectrometer, in order to solve the technical problems in the background art.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A portable near-infrared spectrometer comprises:

[0010] A housing, the upper surface of the housing comprising a touch switch, an upper detection hole, the lower surface of the housing comprising a lower detection hole;

[0011] An integrating sphere, installed in the housing, located at the front of the spectrometer, in the shape of a sphere, having a hollow diffuse reflection space inside, the inside of the sphere having a light hole, a signal hole, an upper measurement hole and a lower measurement hole;

[0012] A light emitter, installed in the housing, connected to the integrating sphere, emitting near-infrared light to the inside of the integrating sphere through the light hole of the integrating sphere;

[0013] A fixing plate, installed in the housing, located behind the integrating sphere, used to fix the spectrum sensor and the main control board;

[0014] A main control board, installed in the housing, located behind the fixing plate, electrically connected to the light emitter, the touch switch and the power supply;

[0015] A spectrum sensor, installed in the housing, located behind the main control board;

[0016] A power supply, installed in the housing, located behind the main control board, at the tail of the spectrometer, electrically connected to the main control board.

[0017] In some embodiments, the touch switch is provided with an LED status light at the center position, and the touch switch and the LED status light are designed as an integrated structure, and the touch switch is used to turn on or off the portable near-infrared spectrometer.

[0018] In some embodiments, the upper detection hole, the lower detection hole, the upper measurement hole and the lower measurement hole have the same central axis, and the arrangement sequence from top to bottom is the upper detection hole, the upper measurement hole, the lower measurement hole and the lower detection hole.

[0019] In some embodiments, the light emitter is composed of a halogen tungsten lamp, a condensing sleeve and a light homogenizing plate; the halogen tungsten lamp is located at the center position of the condensing sleeve and is electrically connected to the main control board, the light homogenizing plate is located at the front end of the light emitter and is located directly in front of the halogen tungsten lamp, the condensing sleeve collects the near-infrared light emitted by the halogen tungsten lamp on the light homogenizing plate, and the near-infrared light emitted from the front of the light homogenizing plate is stable and uniform after the homogenization treatment of the light homogenizing plate.

[0020] In some embodiments, the wavelength range of the near-infrared light emitted by the halogen tungsten lamp 12 is 320-2500 nm.

[0021] In some embodiments, the housing is made of aluminum alloy material.

[0022] In some embodiments, the housing is provided with a charging port for charging the power supply through the charging port.

[0023] In some embodiments, the detection dish is also included, which is composed of a liquid dish and a step, wherein the liquid dish is a hollow cylinder with a diameter smaller than that of the upper measuring hole, and the step is also a hollow cylinder with a diameter larger than that of the upper measuring hole and smaller than that of the upper detection hole, and a height higher than that of the upper detection hole.

[0024] The portable near-infrared spectrometer has the beneficial effects compared with the prior art that:

[0025] (1) The portable near-infrared spectrometer has the beneficial effects compared with the prior art that:

[0026] (2) The portable near-infrared spectrometer has the beneficial effects compared with the prior art that:

[0027] (3) The portable near-infrared spectrometer has the beneficial effects compared with the prior art that: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the portable near-infrared spectrometer disclosed by the utility model;

[0029] Figure 2 is a structural schematic diagram of the portable near-infrared spectrometer disclosed by the utility model;

[0030] Figure 3 is a sectional view of the portable near-infrared spectrometer disclosed by the utility model;

[0031] Figure 4 is a structural schematic diagram of the light emitter disclosed by the utility model;

[0032] Figure 5 is a structural schematic diagram of the detection dish disclosed by the utility model. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described below in a more detailed manner with reference to the drawings in the preferred embodiments of the present application. Identical or similar reference numerals are used for identical or similar components or components having identical or similar functions throughout the drawings. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] The embodiments of the present application will be described in detail below with reference to the drawings.

[0035] In the description of the present application, it should be noted that, unless explicitly defined and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or display including a series of steps or units need not be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or displays.

[0038] The following will be described in detail Figures 1-5 A portable near-infrared spectrometer related to the embodiments of the present application will be described in detail. It should be noted that the following embodiments are used to explain the present application and do not constitute a limitation of the present application.

[0039] Embodiment 1:

[0040] Referring to Figures 1-5The utility model provides a kind of portable near infrared spectrometer, including: shell 1, integrating sphere 6, light emitter 11, shell 1 can be cuboid design, wherein shell upper surface contains touch switch 2, charging port 3 and upper detection hole 4, shell lower surface contains lower detection hole 5.Integrating sphere 6 is installed in the shell 1, is located in the front of spectrometer, spherical design, with hollow diffuse reflection space inside, light hole 7, signal hole 8, upper measurement hole 9 and lower measurement hole 10 are opened in the inside of ball.The upper detection hole 4 and lower detection hole 5, upper measurement hole 9, lower measurement hole 10 have the same central axis, and the arrangement order from top to bottom is upper detection hole 4, upper measurement hole 9, lower measurement hole 10, lower detection hole 5.

[0041] Light emitter 11 is installed in the shell 1, is connected with integrating sphere 6, emits near infrared light to the inside of integrating sphere by integrating sphere light hole 7, and includes halogen tungsten lamp 12, condensing sleeve 13 and homogenization plate 14.Fixed plate 15 is installed in the shell 1, is located in the back of integrating sphere 6, for fixing optical spectrum sensor 16 and main control board 17, maintains the stability of internal structure of instrument;Main control board 17 is installed in the shell 1, is located in the back of fixed plate 15, includes signal receiving plate 18, signal processing plate 19, and is electrically connected with light emitter 11, touch switch 2, power supply 20.Power supply 20 is installed in the shell 1, is located in the back of main control board 17, the tail of spectrometer, and is electrically connected with main control board 17.

[0042] The utility model provides a kind of portable near infrared spectrometer, by micro electro mechanical technology, innovation design instrument structure and optimization system performance, realize the miniaturization of equipment, portable, and ensure that it still can carry out stable, efficient near infrared spectrum measurement under various environments, to meet modern diversification, multi-scene application demand, broaden the application field of near infrared spectrum technology, improve its convenience and practicality in actual work.

[0043] The shell 1 is made of aluminum alloy material, which is low in cost, simple and light, and has high plasticity.

[0044] The touch switch 2 is provided with an LED status lamp 21 at the center position, and the touch switch 2 and the LED status lamp 21 are designed as an integrated structure to effectively save the instrument space. The touch switch 2 is used to turn on or off the portable near infrared spectrometer. If the instrument is in the shutdown state, it can be turned on by long pressing. If the instrument is in the on state, it can be turned off by long pressing. The LED status lamp 21 is used to display the on or off state of the portable near infrared spectrometer and whether it has connected Bluetooth. If the LED status lamp 21 is blue and flickering, it indicates that the device is in the on state and has not connected Bluetooth. If the LED status lamp 21 is blue and constantly on, it indicates that the device is in the on state and has connected Bluetooth. If the LED status lamp 21 is off, it indicates that the device is in the off state.

[0045] In the detection of different types of samples to be tested, the upper measuring hole 9 and the lower measuring hole 10 are kept in an open state. In the detection of solid samples, the lower detection hole 5 is sealed with a lightproof soft pad to ensure that it is maintained in a closed and lightproof state, the upper detection hole 4 is in an open state, a quartz glass sheet is used to cover the upper detection hole 4 to ensure that no impurities enter the integrating sphere 6, and then the solid sample to be tested is placed on the quartz glass sheet to completely cover the upper detection hole 4 for detection. In the detection of liquid samples, the lower detection hole 5 is still kept in a closed and lightproof state, the liquid sample is poured into the detection dish 22, and the detection dish 22 is put into the integrating sphere through the upper detection hole 4 and the upper measuring hole 9 for detection. In the detection of gaseous samples, the upper detection hole 4 and the lower detection hole 5 are kept in an open state, which is conducive to the rapid and uniform distribution of gaseous samples in the integrating sphere 6. The portable near-infrared spectrometer is placed in a gaseous environment, and the detection instruction is transmitted through the Bluetooth module to complete the related detection.

[0046] As shown in the accompanying Figure 5 The detection dish 22 is made of quartz glass and consists of a liquid dish 23 and a step 24. The liquid dish 23 is a hollow cylinder with a diameter slightly smaller than that of the upper measuring hole 9, so that the liquid dish 23 can pass through the upper measuring hole 9 and enter the integrating sphere 6. The step 24 is also a hollow cylinder with a diameter larger than that of the upper measuring hole 9 and smaller than that of the upper detection hole 4, and its height is higher than that of the upper detection hole 4. This makes it very convenient to put the detection dish into or take it out of the integrating sphere to complete the detection of liquid samples.

[0047] As shown in the accompanying Figure 4 The light emitter 11 consists of a halogen tungsten lamp 12, a condensing sleeve 13 and a homogenizing plate 14. The halogen tungsten lamp 12 is located at the center of the condensing sleeve 13 and is electrically connected to the main control board 17. The halogen tungsten lamp 12 emits near-infrared light with a wavelength range of 320-2500 nm, which almost covers the entire near-infrared band. The larger the wavelength range, the more versatile the portable near-infrared spectrometer can be. The condensing sleeve 13 can condense the near-infrared light emitted by the halogen tungsten lamp 12 to improve the intensity and collimation of the near-infrared light source. The homogenizing plate 14 is located at the front end of the light emitter and directly in front of the halogen tungsten lamp 12. The near-infrared light emitted by the halogen tungsten lamp 12 is collected by the condensing sleeve 13 and then passes through the homogenizing plate 14 for uniformization treatment, and then stable and uniform near-infrared light is emitted from the front of the homogenizing plate 14.

[0048] The main control board 17 comprises a signal receiving board 18 and a signal processing board 19, and the main control board 17 is divided into the signal receiving board 18 and the signal processing board 19, so that the space can be effectively saved, the integration is facilitated, and the heat dissipation is facilitated. The spectrum sensor 16 is integrated on the signal receiving board 18, the signal receiving board 18 converts the received near-infrared light signal into an electric signal, and then transmits the electric signal to the signal processing board 19, the signal processing board 19 processes and converts the electric signal into spectrum data information, and temporarily stores the data information in an ARM chip, and further exchanges data with a handheld mobile device through a Bluetooth module.

[0049] The power supply 20 is electrically connected with the main control board 17, provides electric energy for the spectrometer device, and an external power adapter charges the power supply 20 through the charging port 3. The power supply 20 preferably selects a lithium battery, has low cost, stable power supply performance, and multiple sizes, and has strong adaptability.

[0050] The spectrum sensor 16 is a miniature sensor based on spectrum MEMS technology, has small volume, low power consumption and low cost, and the spectrum sensor is directly integrated on the signal receiving board 18, so that the device space can be effectively saved, meanwhile, the low power consumption can make the power supply 20 have a longer power supply time and a smaller volume, and the spectrum sensor does not need external power supply for continuous power supply, and has a wider application scene. Meanwhile, the main control board 17 is divided into the signal receiving board 18 and the signal processing board 19, and the installation space is further saved. Through the structure of the above portable near-infrared spectrometer, all functions of the near-infrared spectrometer can be realized in limited space, so that the portable near-infrared spectrometer not only has small volume, but also has complete functions, and has a very wide application scene. In the above, the utility model provides a kind of portable near-infrared spectrometer device with simple structure, low cost, result real-time visible, small device volume and wide application scene.

[0051] The working process of the portable near-infrared spectrometer is as follows: the spectrometer equipment is turned on by long-pressing the touch switch 2, the touch switch 2 is connected with the handheld mobile device through the Bluetooth module, after the connection is completed, the sample to be measured is placed in the upper detection hole 4, the handheld mobile device sends a collection instruction to the portable near-infrared spectrometer, the main control board 17 of the portable near-infrared spectrometer opens the light emitter 11, the light emitter 11 emits near-infrared light to the integrating sphere 6 through the light hole 7, the near-infrared light is reflected in the integrating sphere 6 and reaches the sample to be measured through the upper measurement hole 9, the sample to be measured absorbs and reflects the near-infrared light, the reflected near-infrared light returns to the integrating sphere 6, and after multiple reflections in the integrating sphere, the reflected near-infrared light reaches the signal hole 8 and is received by the spectrum sensor 16, the signal receiving plate 18 processes the received near-infrared light into an electric signal, and further transmits the electric signal to the signal processing plate 19, and after the signal processing plate 19 processes the electric signal, the data is transmitted to the handheld mobile device through the Bluetooth module, and the spectrum data collection work of the portable near-infrared spectrometer is completed.

[0052] The above only describes preferred embodiments of the present application, and is used to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A portable near infrared spectrometer, characterized in that, It comprises: a shell, the upper surface of which contains a touch switch and an upper detection hole, and the lower surface of which contains a lower detection hole; an integrating sphere, which is installed in the shell, is located at the front of the spectrometer, has a spherical shape, has a hollow diffuse reflection space inside, and has a light hole, a signal hole, an upper measurement hole and a lower measurement hole in the inside of the sphere; a light emitter, which is installed in the shell, is connected to the integrating sphere, and emits near-infrared light to the inside of the integrating sphere through the light hole of the integrating sphere; a fixing plate, which is installed in the shell, is located behind the integrating sphere, and is used to fix a spectrum sensor and a main control board; a main control board, which is installed in the shell, is located behind the fixing plate, and is electrically connected to the light emitter, the touch switch and a power supply; a spectrum sensor, which is installed in the shell, is located behind the main control board; a power supply, which is installed in the shell, is located behind the main control board, is located at the tail of the spectrometer, and is electrically connected to the main control board.

2. The portable near infrared spectrometer according to claim 1, wherein, The touch switch is provided with an LED status lamp at the center position, and the touch switch and the LED status lamp are designed as an integrated structure. The touch switch is used to turn on or off the portable near-infrared spectrometer.

3. The portable near infrared spectrometer according to claim 1, wherein, The upper detection hole, the lower detection hole, the upper measurement hole and the lower measurement hole have the same central axis, and are arranged in the order of the upper detection hole, the upper measurement hole, the lower measurement hole and the lower detection hole from top to bottom.

4. The portable near infrared spectrometer according to claim 1, wherein, The light emitter is composed of a halogen tungsten lamp, a condensing sleeve and a light homogenizing plate. The halogen tungsten lamp is located at the center position of the condensing sleeve and is electrically connected to the main control board. The light homogenizing plate is located at the front end of the light emitter and is located directly in front of the halogen tungsten lamp. The condensing sleeve collects the near-infrared light emitted by the halogen tungsten lamp on the light homogenizing plate. After the uniformization treatment of the light homogenizing plate, the stable and uniform near-infrared light is emitted from the front of the light homogenizing plate.

5. The portable near infrared spectrometer according to claim 4, wherein, The wavelength range of the near-infrared light emitted by the halogen tungsten lamp is 320nm-2500nm.

6. The portable near infrared spectrometer according to claim 1, wherein, The shell is made of aluminum alloy material.

7. The portable near infrared spectrometer according to claim 1, wherein, The shell is provided with a charging port for charging the power supply through the charging port.

8. The portable near infrared spectrometer according to any one of claims 1 to 7, characterized in that It further comprises a detection dish used in conjunction, which is composed of a liquid dish and a step. The liquid dish is a hollow cylinder with a diameter smaller than that of the upper measurement hole. The step is also a hollow cylinder with a diameter larger than that of the upper measurement hole and smaller than that of the upper detection hole, and a height higher than that of the upper detection hole.

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