CN215263125U

CN215263125U - Near-infrared spectrometer

Info

Publication number: CN215263125U
Application number: CN202120808573.2U
Authority: CN
Inventors: 邹坚; 陈敏; 曹庆国; 徐银; 马玲玲; 黄露婷; 艾飞; 赵永红; 马准; 周日波; 刘鹏
Original assignee: Individual
Current assignee: Unit 25 Unit 32228 Pla
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-12-21
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a near-infrared spectrometer relates to chemical test instrument technical field, including the bottom plate and with the panel that the bottom plate is connected the bottom plate with be equipped with light source, detector and sample cell between the panel, the light source the detector the sample cell respectively with the bottom plate or panel fixed connection, be equipped with vibration damper on the bottom plate, still including being used for control the temperature control component and the power of the temperature of detector, the power does the light source the detector and temperature control component provides the electric energy. So set up, this near-infrared spectrometer possesses the ability of witnessed inspections, and the volume is less, it is convenient to remove, and vibration damper can reduce rocking and the vibration of instrument when removing and testing, has improved the measurement accuracy of instrument, and temperature control assembly can be with the temperature stability of detector at certain temperature range, has improved the stability of detector, and then ensures the uniformity of detecting the spectrum.

Description

Near-infrared spectrometer

Technical Field

The utility model relates to a chemistry test instrument technical field, more specifically say, relate to a near-infrared spectrum appearance.

Background

The near infrared spectrum analysis technology is a comprehensive analysis technology which is developed rapidly in recent years, and reflects the information of chemical bonds such as C-H, O-H, N-H, S-H in a sample through the absorption of the sample to a spectrum, so that the corresponding components and content in the sample are obtained. The method has the capability of simultaneously measuring the content of various components and other characteristic property parameters in a sample within a few seconds to a few minutes. When the near infrared spectrum is used for analysis, no pretreatment is needed to be carried out on a sample, and no chemical reagent is needed, so that the near infrared spectrum analysis is widely applied in recent years.

In the prior art, the near-infrared spectrometer is large in size, is mostly used in a laboratory, and is inconvenient to carry to a site for detection. Moreover, the near-infrared spectrometer is a precision testing instrument, and the instrument is inevitably shaken and vibrated in the carrying process, so that the measurement precision of the instrument is influenced; the field environment is more complex, and the temperature and humidity conditions can change along with the weather, so that the test result of the instrument is influenced to a certain extent.

Therefore, how to solve the problems that the near-infrared spectrometer in the prior art is inconvenient to move, is not suitable for field detection, and is easy to influence the detection result by the external environment becomes an important technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a near-infrared spectrum appearance solves the inconvenient removal of near-infrared spectrum appearance among the prior art, is not suitable for the witnessed inspections, and external environment easily causes the problem of influence to its testing result. The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a near-infrared spectrometer, including the bottom plate and with the panel that the bottom plate is connected the bottom plate with be equipped with light source, detector and sample cell between the panel, the light source the detector the sample cell respectively with the bottom plate or panel fixed connection, be equipped with vibration damper on the bottom plate, still including being used for control the temperature control component and the power of the temperature of detector, the power does the light source the detector and temperature control component provides the electric energy.

Preferably, the vibration damping means comprises a rubber pad provided on a lower surface of the base plate.

Preferably, the temperature control assembly comprises a temperature controller, a temperature sensor and a heat sink both connected with the detector, and both the temperature sensor and the heat sink are communicably connected with the temperature controller; when the temperature value of the detector sensed by the temperature sensor is larger than a preset value, the temperature controller controls the radiator to cool the detector.

Preferably, the heat sink includes a heat sink connected to the detector and a first fan provided on the heat sink, the first fan being communicably connected to the temperature controller.

Preferably, the detector and the light source are separately disposed, the heat sink is disposed on a side of the detector away from the light source, and the first fan drives air to flow from the detector to the light source.

Preferably, at least two upright posts are arranged between the bottom plate and the panel, and the upright posts are connected with the bottom plate and the upright posts are connected with the panel through fasteners.

Preferably, a second fan is arranged on the panel and used for exhausting air between the panel and the bottom plate.

Preferably, the sample cell device further comprises a supporting member for supporting the sample cell and a transmission member, wherein the transmission member is connected with the supporting member to drive the supporting member to rotate.

Preferably, the transmission part comprises a motor and a transmission gear, the motor is electrically connected with the power supply, and the transmission gear drives the support part to rotate.

Preferably, the vibration damping device further comprises a box body, the bottom plate and the panel are arranged in the box body, and the vibration damping device is arranged between the bottom plate and the box body.

The utility model provides an among the technical scheme, near-infrared spectrum appearance includes the bottom plate and sets up the panel in the bottom plate top, fixed connection between bottom plate and the panel is equipped with light source, detector and sample cell between bottom plate and panel, light source, detector, sample cell respectively with bottom plate or panel fixed connection, be equipped with vibration damper on the bottom plate, near-infrared spectrum appearance still includes temperature control component and power, temperature control component is used for controlling the temperature of detector, the power provides the electric energy for light source, detector and temperature control component. So set up, the sample in the light source shines the sample cell, the detector obtains the absorption spectrum of sample to near infrared light, through absorption spectrum alright learn composition and content in the sample, this near infrared spectrometer possesses the ability of witnessed inspections, the volume is less, it is convenient to remove, vibration damper can reduce rocking and vibration of instrument when removing and testing, the measurement accuracy of instrument has been improved, temperature control assembly can be with the temperature stability of detector in certain temperature range, the stability of detector has been improved, and then ensure the uniformity of detection spectrum.

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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a near-infrared spectrometer in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a heat sink in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a rubber pad in an embodiment of the present invention.

In the figure:

1-bottom plate, 2-panel, 3-light source, 4-detector, 5-sample cell, 6-rubber pad, 7-controller support, 8-radiator, 81-radiating fin, 9-upright column, 10-fastener, 11-radiating plate, 12-transmission component box and 13-window.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

An object of this embodiment is to provide a near-infrared spectrometer, solve the inconvenient removal of near-infrared spectrometer among the prior art, be unsuitable for the witnessed inspections, and external environment easily causes the problem of influence to its testing result.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1-3, in this embodiment, the near-infrared spectrometer includes a bottom plate 1 and a panel 2 disposed above the bottom plate 1 and fixedly connected to the bottom plate, the near-infrared spectrometer further includes a light source 3 disposed between the bottom plate 1 and the panel 2, a detector 4, a sample cell 5, a temperature control module and a power supply, the light source 3, the detector 4, the sample cell 5 and the power supply are all fixedly connected to the bottom plate 1 or the panel 2, the bottom plate 1 is further provided with a vibration damping device, the temperature control module is connected to the detector 4 for controlling the temperature of the detector 4, and the power supply provides power for the light source 3, the detector 4 and the temperature control module. Specifically, the vibration damping device is provided on the lower surface of the base plate 1.

In the field test process, the light source 3 emits near infrared light to irradiate a sample in the sample pool 5, the detector 4 obtains a light absorption spectrogram of the sample through analysis of a data analysis system according to the absorption rate of the sample to the near infrared light, and the information of components and content in the sample can be obtained through the light absorption spectrogram. The near-infrared spectrometer has the capability of on-site detection, is small in size and convenient to move due to power supply of the near-infrared spectrometer, and can reduce shaking and vibration of the spectrometer during movement and testing and improve the measurement precision of the spectrometer due to the vibration damper on the bottom plate 1; the temperature control component can stabilize the temperature of the detector 4 within a certain temperature range, so that the measurement precision and stability of the detector 4 are improved, and the consistency of the detection spectrum is further ensured. The problem of near-infrared spectrometer among the prior art inconvenient removal, be not suitable for the witnessed inspections, and external environment easily causes the influence to its testing result is solved.

In a preferred version of the present embodiment, the vibration damping means comprises a rubber pad 6 provided on the lower surface of the base plate 1. The rubber pad 6 and the bottom plate 1 are fixed by a fastener 10 such as a bolt. So set up, rubber has certain elasticity, can play the cushioning effect to rocking and the vibration of instrument, and the measurement result that the rocking of avoiding removing the in-process leads to near-infrared spectrometer is inaccurate, reduces the measuring error who leads to because of the instrument vibration.

Specifically, temperature control assembly includes temperature controller, temperature sensor and radiator 8, and temperature sensor and radiator 8 all are communicably connected with temperature controller, and temperature sensor and radiator 8 all are connected with detector 4, and temperature sensor is used for the temperature value of response detector 4, and radiator 8 is used for cooling to detector 4. The temperature controller obtains the temperature value of detector 4 that temperature sensor sensed, and when the temperature value was greater than the default, temperature controller control radiator 8 was to detector 4 cooling. It should be noted that the preset value is 26-28 ℃, and preferably the preset value is set to 27 ℃, so as to stabilize the temperature value of the detector 4 at about 27 ℃, ensure the consistency of the detection spectrum, and reduce the influence of the field environment temperature on the measurement accuracy.

Further, the heat sink 8 includes a heat sink 81 and a first fan communicably connected with the temperature controller. The heat sink 81 is connected to the detector 4 to dissipate heat generated by the detector 4, and the first fan is disposed in the detector 4 to allow air to flow from one side of the detector 4 to the other side, thereby reducing the temperature of the heat sink 8 and the detector 4.

Preferably, the near-infrared spectrometer further comprises a controller, a data analysis system and a display device, wherein the controller controls the display device to display the data information and the spectrogram obtained by the data analysis system. The temperature controller may be provided separately or the temperature of the detector 4 may be controlled by the controller in this embodiment. The controller is fixed on the controller bracket 7, and the controller bracket 7 is arranged on the bottom plate 1.

In this embodiment, detector 4 and light source 3 separate setting, specifically, detector 4 and light source 3 set up respectively at the both ends of near-infrared spectrometer, and radiator 8 sets up the one side of keeping away from light source 3 at detector 4, and first fan drives the air and flows into detector 4 by detector 4 one side of keeping away from light source 3, and then flows to light source 3, and the flow of air is accelerated, plays the purpose that reduces the inside temperature of instrument.

In this embodiment, be equipped with two at least stands 9 between bottom plate 1 and the panel 2, the upper and lower both ends of stand 9 all are equipped with along its axially extended screw hole, and the position that corresponds with stand 9 on bottom plate 1 and the panel 2 all is equipped with the through-hole, and the screw stretches into the through-hole and fastens with the screw hole cooperation, realizes the fastening connection between stand 9 and bottom plate 1, stand 9 and the panel 2.

In the preferred scheme of this embodiment, the panel 2 is further provided with a second fan, and the second fan is an exhaust fan, and exhausts the air with higher temperature between the panel 2 and the bottom plate 1, so as to accelerate the air circulation and heat exchange between the inside and the outside of the instrument. It should be noted that a heat dissipation plate 11 is further disposed on the panel 2, in some embodiments, the second fan may be disposed in the heat dissipation plate 11, and of course, in other embodiments, the second fan may also be disposed separately.

In this embodiment, the near-infrared spectrometer further includes a supporting member for supporting the sample cell 5 and a transmission member, and the transmission member is connected to the supporting member to drive the supporting member to rotate. Specifically, the supporting part can be sample platform or support frame, and drive unit is connected with supporting part, drives sample platform or support frame and rotates, and sample cell 5 places on sample platform or support frame, comes the multiunit spectral data of the different positions of test sample through rotating, is convenient for carry out the analysis to the component and the content of sample, reduces measuring error. The sample cell 5 comprises a box body and a cover body which is matched and connected with the upper port of the box body, and a sample is placed in the sample cell 5 for testing.

Specifically, the transmission part comprises a motor and a transmission gear, the motor is electrically connected with a power supply, a rotating shaft of the motor is connected with the transmission gear, and the transmission gear is connected with the supporting part, so that the motor drives the supporting part to rotate. The transmission member is disposed in a transmission member case 12, and the transmission member case 12 is disposed on the upper surface of the panel 2. A window 13 for placing a sample is provided on the upper end surface of the transmission member case 12. Of course, in other embodiments, the motor is not limited to drive the supporting member to rotate through the transmission gear, and can also drive the supporting member to rotate through structures such as a belt and a chain, as long as the driving mode can drive the supporting member to rotate.

In this embodiment, the near-infrared spectrometer further includes a box body, the bottom plate 1, the panel 2, and the power supply, the battery, the detector 4 and other components fixedly arranged between the bottom plate 1 and the panel 2 are all arranged in the box body, and the vibration damping device is arranged between the bottom plate 1 and the box body. So set up, box portable and removal have certain guard action to the spare part of instrument, and vibration damper can also reduce the vibration of instrument in the box and rock.

In addition, the power supply of the near-infrared spectrometer is a 12V low-voltage power supply and is in a human body safety voltage range, so that the damage of the power supply to a human body is reduced. After the power supply enters the instrument, clutter interference is removed through the direct current filter. A power supply circuit and a control circuit in the near-infrared spectrometer are separately arranged to reduce intersection and iteration and prevent electromagnetic interference between the circuits. The communication cable adopts the shielding cable, prevents the interference of signal of telecommunication.

In the present embodiment, the near-infrared spectrometer includes a box, a bottom plate 1 and a panel 2 disposed in the box, four pillars 9 are disposed between the panel 2 and the bottom plate 1, and the panel 2 and the bottom plate 1 are fixedly connected through the pillars 9. Be equipped with a plurality of rubber pads 6 between bottom plate 1 and the box, be equipped with between bottom plate 1 and the panel 2 with bottom plate 1 or panel 2 fixed connection's light source 3, detector 4, temperature control component, sample cell 5 and power, detector 4 and light source 3 set up the both ends at the instrument respectively, temperature control component sets up the one side of keeping away from light source 3 at detector 4, temperature control component includes temperature controller, and all temperature sensor and radiator 8 that are connected with detector 4, radiator 8 includes fin 81 and the first fan of setting on fin 81, first fan and temperature sensor all are communicably connected with temperature controller. The panel 2 is also provided with a second fan for exhausting hot air in the instrument and accelerating air with lower temperature outside the instrument to flow into the instrument. The power supply provides power for the light source 3, the detector 4 and the temperature control assembly.

So set up, rubber pad 6 can remove or the shaking and the vibration of test in-process to the instrument plays the cushioning effect, improves near-infrared spectrometer's stability and measurement accuracy, and temperature control assembly ensures the uniformity of detecting the spectrum at suitable scope with the temperature control of detector 4.

The near infrared spectrometer can be used for testing the content of diphenylamine and a medium stabilizer in a sample, and specifically comprises the following testing steps.

Firstly, crushing and pretreating a sample containing diphenylamine or a stabilizer, screening, selecting a sample with the size of 2-3mm, pouring the sample into a sample pool 5, wherein the size of the sample pool 5 is 36mm, spreading the sample to two thirds of the sample pool 5 for multiple times, slightly shaking the sample pool 5, keeping the internal gaps of the sample uniform and as small as possible, and keeping the bottom of the sample without obvious large gaps, further carrying out three-time measurement on the sample, collecting a spectrogram for comparison calculation, and if the average deviation of the spectrogram is less than one thousandth, namely, reloading the sample for measurement until the average deviation of the spectrogram is less than one thousandth.

Secondly, collecting spectrums of samples as much as possible, wherein the specific number is not less than 50, simultaneously, carrying out data collection on the content of diphenylamine and a medium reagent in the samples by adopting a gas chromatography analysis method, carrying out modeling analysis on spectrograms and data collected by two modes by utilizing chemometrics software, carrying out internal verification and external verification on the established model, eliminating abnormal values, retaining a desirable value, selecting an accurate and reliable model, using the model as a standard, detecting by using a near infrared spectrum analysis technology, and determining the content of diphenylamine and the medium reagent in unknown samples.

And finally, after the contents of diphenylamine and the intermediate reagent in the unknown sample are measured by using a near-infrared spectrometer, the contents of diphenylamine and the intermediate reagent in the unknown sample are synchronously measured by using a gas chromatography, and experimental data are contrastively analyzed, so that the accuracy of the established model is further verified, and the feasibility of measuring the contents of diphenylamine and the intermediate reagent by using a near-infrared spectrum analysis technology is explained.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments. The utility model provides a plurality of schemes contain the basic scheme of itself, mutual independence to restrict each other, but it also can combine each other under the condition of not conflicting, reaches a plurality of effects and realizes jointly.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a near-infrared spectrometer, its characterized in that, including bottom plate (1) and with panel (2) that bottom plate (1) is connected bottom plate (1) with be equipped with light source (3), detector (4) and sample cell (5) between panel (2), light source (3) detector (4) sample cell (5) respectively with bottom plate (1) or panel (2) fixed connection, be equipped with vibration damper on bottom plate (1), still including being used for control the temperature control component and the power of the temperature of detector (4), the power does light source (3), detector (4) and the temperature control component provides the electric energy.

2. The near-infrared spectrometer according to claim 1, characterized in that the vibration reduction means comprise a rubber pad (6) arranged on the lower surface of the base plate (1).

3. The near-infrared spectrometer of claim 1, characterized in that the temperature control assembly comprises a temperature controller, a temperature sensor and a heat sink (8) both connected to the detector (4), the temperature sensor and the heat sink (8) both communicatively connected to the temperature controller; when the temperature value of the detector (4) sensed by the temperature sensor is larger than a preset value, the temperature controller controls the radiator (8) to cool the detector (4).

4. The near-infrared spectrometer of claim 3, characterized in that the heat sink (8) comprises a heat sink (81) connected with the detector (4) and a first fan arranged on the heat sink (81), the first fan being communicatively connected with the temperature controller.

5. The near-infrared spectrometer according to claim 4, characterized in that the detector (4) and the light source (3) are arranged separately, the heat sink (8) is arranged on the side of the detector (4) remote from the light source (3), and the first fan drives air from the detector (4) towards the light source (3).

6. The near-infrared spectrometer according to claim 1, characterized in that at least two uprights (9) are provided between the base plate (1) and the face plate (2), the uprights (9) being connected to the base plate (1) and the uprights (9) being connected to the face plate (2) by means of fasteners (10).

7. The near-infrared spectrometer according to claim 1, characterized in that a second fan is provided on the face plate (2) for exhausting air between the face plate (2) and the bottom plate (1).

8. The near-infrared spectrometer of claim 1, further comprising a support member for supporting the sample cell (5) and a transmission member connected to the support member for rotating the support member.

9. The near-infrared spectrometer of claim 8, wherein the transmission member comprises a motor and a transmission gear, the motor is electrically connected to the power source, and the support member is driven to rotate by the transmission gear.

10. The near-infrared spectrometer according to claim 1, further comprising a housing, wherein the base plate (1) and the face plate (2) are both disposed within the housing, and wherein the vibration reduction device is disposed between the base plate (1) and the housing.