CN114839138A - Nondestructive optical detection device for water-containing sample - Google Patents
Nondestructive optical detection device for water-containing sample Download PDFInfo
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- CN114839138A CN114839138A CN202110139436.9A CN202110139436A CN114839138A CN 114839138 A CN114839138 A CN 114839138A CN 202110139436 A CN202110139436 A CN 202110139436A CN 114839138 A CN114839138 A CN 114839138A
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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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- 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
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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
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention provides a nondestructive optical detection device for a water-containing sample, which comprises an objective table, a light source incidence device and a spectrum detection device, wherein the objective table is provided with a light source incidence device; the objective table is used for placing a sample to be detected; the light source incidence device comprises an adjusting bracket, the adjusting bracket is used for mounting a plurality of light sources, the light sources are used for emitting incident light towards a sample to be measured, and the adjusting bracket is used for respectively adjusting the positions and the light-emitting angles of the light sources; the spectrum detection device is provided with a detection end which is used for extending to a sample to be detected. The invention is convenient for adopting different light sources to emit incident light to the sample to be detected in different directions and at different incident angles, can realize omnibearing spectrum detection on the sample to be detected, and ensures the accuracy of the detection result.
Description
Technical Field
The invention relates to the technical field of optical detection, in particular to a nondestructive optical detection device for a water-containing sample.
Background
The nondestructive optical detection is to detect the defects and physical and chemical parameters of the detected object by using optical characteristics on the premise of not damaging or influencing the use performance of the detected object. The nondestructive optical detection technology is particularly suitable for sorting the quality of fruits, fresh foods and other moisture-containing foods.
The conventional production-type nondestructive optical detection equipment mainly pursues flux, and during optical detection, a light source with fixed wavelength and fixed irradiation angle is often arranged, and after light emitted by the light source is irradiated to a sample to be detected, the light passing through the sample is detected by a detector with a fixed detection position. During the detection process, the sample poses are also randomly arranged. The detection mode focuses on efficiency and sacrifices precision, is beneficial to controlling production cost, and is not a device for researching a deep detection mechanism and an iterative judgment model.
At present, the laboratory stage is used for not damaged detection fruit inside water content distribution's check out test set has a lot of, however, these check out test set lack unified standard, mostly use to build by oneself as leading, do not consider the multidimension degree demand of research. In the related art, a hand-held fruit internal water core disease sorting device is disclosed. However, the light source irradiation angle of the device is fixed, so that the fruits to be detected cannot be detected in an all-around manner, some regions on the fruits to be detected can be inevitably omitted during detection, and the accuracy of a detection result is influenced to a certain extent.
Disclosure of Invention
The invention provides a nondestructive optical detection device for a water-containing sample, which is used for solving the problem that the accuracy of a detection result is influenced because the existing nondestructive optical detection equipment cannot detect fruits to be detected in an all-round manner.
The invention provides a nondestructive optical detection device for a water-containing sample, which comprises: the device comprises an object stage, a light source incidence device and a spectrum detection device; the objective table is used for placing a sample to be detected; the light source incidence device comprises an adjusting bracket, the adjusting bracket is used for mounting a plurality of light sources, the light sources are used for emitting incident light towards the sample to be detected, and the adjusting bracket is used for respectively adjusting the positions and the light-emitting angles of the light sources; the spectrum detection device is provided with a detection end, and the detection end is used for extending to the sample to be detected.
According to the nondestructive optical detection device for the water-containing sample, the adjusting bracket comprises an arc-shaped fixing frame, a light source mounting seat and an adapter plate; one end of the arc-shaped fixing frame is connected with the objective table, and the other end of the arc-shaped fixing frame is connected with the adapter plate; the arc-shaped fixing frames comprise a plurality of arc-shaped fixing frames which are distributed circumferentially relative to the adapter plate; the light source mounting seat is mounted on the arc-shaped fixing frame and can move along the extending direction of the arc-shaped fixing frame, and the light source mounting seat is used for mounting the light source.
According to the nondestructive optical detection device for the water-containing sample, the light source mounting seat comprises a moving seat, a gear driving mechanism and a guiding mechanism; the gear driving mechanism comprises a driving motor and a gear pair, the gear pair comprises a gear and an arc-shaped rack, the arc-shaped rack is mounted on the arc-shaped fixing frame and arranged along the extending direction of the arc-shaped fixing frame, and the output end of the driving motor is connected with the gear; the guide mechanism comprises a sliding block and an arc-shaped guide rail, the arc-shaped guide rail is arranged on the arc-shaped fixed frame and is arranged along the extension direction of the arc-shaped fixed frame, and the sliding block is slidably arranged on the arc-shaped guide rail along the extension direction; the driving motor and the sliding block are respectively connected with the moving seat, and the moving seat is used for mounting the light source.
According to the nondestructive optical detection device for the water-containing sample, the number of the arc-shaped fixing frames is three, and the three arc-shaped fixing frames are uniformly distributed relative to the adapter plate in a circumferential manner; the size of a central angle corresponding to an arc-shaped track of the light source mounting seat moving on the arc-shaped fixing frame is 0-80 degrees, and the direction of incident light emitted by the light source is along the radial direction of the arc-shaped fixing frame.
According to the nondestructive optical detection device for the water-containing sample, the objective table comprises a fixed table and a movable table; the mobile station is provided with a posture adjusting seat, and the posture adjusting seat is used for placing the sample to be detected so as to adjust the placing posture of the sample to be detected; the mobile station is arranged on the fixed station and can move relative to the fixed station so as to move the sample to be detected to a detection station corresponding to the detection end of the spectrum detection device.
According to the nondestructive optical detection device for the water-containing sample, the posture adjusting seat comprises a storage seat and a rolling adjusting mechanism; an envelope structure is formed on the periphery of the storage seat, the storage seat is used for placing the sample to be detected in a limited area of the envelope structure, a light outlet is formed in the middle of the storage seat, and the detection end of the spectrum detection device extends to the light outlet; the rolling adjusting mechanism comprises a friction shaft and a rotary driving mechanism, and the friction shaft is connected with the rotary driving mechanism and is positioned on the inner side of the envelope structure; the rolling adjusting mechanism is provided with a plurality of rolling adjusting mechanisms.
According to the nondestructive optical detection device for the water-containing sample, the posture adjusting seat further comprises a spherical support, and the spherical support is mounted on the storage seat and is positioned on the inner side of the enclosure structure; the enclosure structure is provided with a first side edge, a second side edge, a third side edge and a fourth side edge which are sequentially connected, and the spherical support is close to the corner positions of the first side edge and the second side edge of the enclosure structure; the rolling adjusting mechanisms are two, the friction shafts of one rolling adjusting mechanism are arranged along the third side edge, and the friction shafts of the other rolling adjusting mechanism are arranged along the fourth side edge.
According to the invention, the nondestructive optical detection device for the water-containing sample further comprises: a housing; the shell cover is arranged on the fixed table, an inlet and an outlet are respectively formed in the opposite side walls of the shell cover along the first direction, and a light shading curtain is arranged on each of the inlet and the outlet; the movable table can reciprocate along the first direction, the movable table is provided with a first station and a second station at intervals along the first direction, the first station and the second station are both provided with posture adjusting seats, and the second station is positioned on the outer side of the shell cover under the condition that the first station is positioned on the detection station.
According to the nondestructive optical detection device for the water-containing sample, the spectrum detection device comprises a three-axis translation table, a detection optical fiber and an optical fiber spectrometer; one end of the detection optical fiber is connected with the triaxial translation stage and used for extending to the sample to be detected, and the other end of the detection optical fiber is connected with the optical fiber spectrometer.
According to the invention, the nondestructive optical detection device for the water-containing sample further comprises: a backlight calibration device; the background light calibration device comprises a deflection mechanism, an attenuation sheet and a calibration optical fiber; the deflection mechanism is arranged on the objective table, and the attenuation sheet is arranged at the deflection end of the deflection mechanism and used for receiving incident light of the light source; one end of the calibration optical fiber is connected with the attenuation sheet, and the other end of the calibration optical fiber is used for being connected with an optical fiber spectrometer; further comprising: the camera module is used for acquiring video information of the current detection environment of the objective table; the light source includes: the fan, the wide-spectrum light source and the focusing lens are packaged into a whole, the focusing lens is located on the light emitting side of the wide-spectrum light source, and the fan is located on the light emitting side deviating from the wide-spectrum light source.
The nondestructive optical detection device for the water-containing sample is provided with the objective table, the light source incidence device and the spectrum detection device, so that the sample to be detected can be placed on the objective table when the water-containing sample to be detected is detected, the light source of the light source incidence device emits incident light to the sample to be detected, the spectrum detection device receives the light passing through the sample to be detected, and the internal defects and other physical and chemical parameters of the sample to be detected are detected through spectrum analysis. Because the adjusting bracket on the light source incidence device can simultaneously realize the adjustment of the positions and the light-emitting angles of the plurality of light sources, the light sources can conveniently adopt different directions and emit incident light to the sample to be detected at different incidence angles, the sample to be detected can be subjected to omnibearing spectrum detection, and the accuracy of the detection result is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for nondestructive optical inspection of an aqueous sample provided by the present invention;
FIG. 2 is a schematic view of the mounting structure of the light source mounting base provided by the present invention on the arc-shaped fixing frame;
FIG. 3 is a schematic diagram of the arrangement of the spectrum detection device and the background light calibration device provided by the present invention;
FIG. 4 is a schematic structural diagram of a posture adjustment base provided by the present invention;
reference numerals:
1: an object stage; 2: a light source incidence device; 3: a spectrum detection device;
4: a backlight calibration device; 5: a camera module; 6: a housing;
7: a light source; 8: a sample to be tested; 11: a fixed table;
12: a lead screw drive mechanism; 13: a mobile station; 14: a posture adjusting seat;
141: a storage seat; 142: a roll adjustment mechanism; 143: a spherical support;
1411: an enclosure structure; 1412: a light outlet; 21: an arc-shaped fixing frame;
22: a light source mounting base; 23: a switching disk; 221: a movable seat;
222: a gear drive mechanism; 223: a guide mechanism; 31: a three-axis translation stage;
32: detecting the optical fiber; 41: a yaw mechanism; 42: an attenuation sheet;
43: calibrating the optical fiber; 61: an inlet; 62: an outlet;
63: a window blind; 71: a fan; 72: a broad spectrum light source;
73: a focusing lens; 100: a first station; 200: and a second station.
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 clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
A nondestructive optical inspection apparatus for an aqueous sample according to the present invention will be described with reference to FIGS. 1 to 4.
As shown in fig. 1, the present embodiment provides a nondestructive optical inspection apparatus for an aqueous sample, comprising: an object stage 1, a light source incidence device 2 and a spectrum detection device 3; the objective table 1 is used for placing a sample 8 to be tested; the light source incidence device 2 comprises an adjusting bracket, the adjusting bracket is used for mounting a plurality of light sources 7, the light sources 7 are used for emitting incident light towards a sample 8 to be measured, and the adjusting bracket is used for respectively adjusting the positions and the light-emitting angles of the light sources 7; the spectrum detection device 3 has a detection end for extending to the sample 8 to be detected. The sample 8 to be detected shown in this embodiment may be fruits such as apple and pear.
Specifically, in the present embodiment, by providing the objective table 1, the light source incidence device 2 and the spectrum detection device 3, when detecting the sample 8 to be detected containing water, the sample 8 to be detected can be placed on the objective table 1, the light source 7 on the light source incidence device 2 emits incident light to the sample 8 to be detected, the spectrum detection device 3 receives light passing through the sample 8 to be detected, and the internal defect and other physical and chemical parameters of the sample 8 to be detected are detected through spectrum analysis. Because the position and the light-emitting angle of a plurality of light sources 7 can be adjusted simultaneously by the adjusting bracket on the light source incidence device 2, the incident light can be conveniently emitted to the sample 8 to be detected by adopting different light sources 7 in different directions and at different incidence angles, the sample 8 to be detected can be subjected to omnibearing spectrum detection, and the accuracy of the detection result is ensured.
It should be noted here that, since the light source 7 shown in the present embodiment is provided in plural, the present embodiment can set the light source 7 as light sources of plural kinds of single wavelengths, and can set the light source 7 as a wide-spectrum light source, and a filter for adjusting different wavelengths can be provided on the light exit side of the wide-spectrum light source.
Meanwhile, the present embodiment can also control the power and the incident angle of each light source 7 individually.
In one embodiment, the light source 7 may be specifically configured as an encapsulation module encapsulated by the fan 71, the wide-spectrum light source 72 and the focusing lens 73, the focusing lens 73 is located on the light emitting side of the wide-spectrum light source 72, and the fan 71 is located on the light emitting side away from the wide-spectrum light source 72. Therefore, the light emitted by the packaging module is the focusing light, and the incident effect on the sample 8 to be measured can be ensured. In this embodiment, by providing the fan 71, the package module can be subjected to heat dissipation in time, so as to prevent the temperature from affecting the spectrum detection of the sample 8 to be detected.
As shown in fig. 1 and fig. 2, the adjusting bracket of the present embodiment includes an arc-shaped fixing frame 21, a light source mounting seat 22, and an adapter plate 23; one end of the arc-shaped fixing frame 21 is connected with the objective table 1, and the other end is connected with the adapter plate 23; the arc-shaped fixing frames 21 comprise a plurality of arc-shaped fixing frames and are distributed circumferentially relative to the adapter plate 23; the light source mounting seat 22 is mounted on the arc-shaped fixing frame 21 and can move along the extending direction of the arc-shaped fixing frame 21, and the light source mounting seat 22 is used for mounting the light source 7. In the case that the arc fixing frame 21 is curved along the arc-shaped track, the extending direction of the arc fixing frame 21 is specifically the direction along the arc-shaped track.
Specifically, the arc fixing frame 21 shown in the present embodiment may be specifically shaped like an arc. Under the condition that the plurality of arc-shaped fixing frames 21 are circumferentially distributed relative to the adapter plate 23, the inner side surfaces of the arc-shaped fixing frames 21 face the central axis where the adapter plate 23 is located. In this embodiment, the end surface of the adapter plate 23 may be further disposed parallel to the table surface on which the objective table 1 is disposed, and the outer side surfaces of the plurality of arc-shaped fixing frames 21 are distributed on the same spherical surface.
Here, by selecting the arc-shaped fixing frame 21 with a suitable radius size, the light-gathering focus when the plurality of light sources 7 are incident can be always located above the detection station, that is, above the center of the sample 8 to be detected, so as to facilitate detection.
Further, as shown in fig. 2, the light source mounting base 22 shown in the present embodiment includes a moving base 221, a gear driving mechanism 222, and a guiding mechanism 223; the gear driving mechanism 222 includes a driving motor and a gear pair, the gear pair includes a gear and an arc rack, the arc rack is mounted on the arc fixing frame 21 and arranged along the extending direction of the arc fixing frame 21, and the output end of the driving motor is connected with the gear; the guiding mechanism 223 comprises a sliding block and an arc-shaped guide rail, the arc-shaped guide rail is installed on the arc-shaped fixing frame 21 and is arranged along the extending direction of the arc-shaped fixing frame 21, and the sliding block is slidably installed on the arc-shaped guide rail along the extending direction of the arc-shaped fixing frame 21; the driving motor and the slider are respectively connected to the movable base 221, and the movable base 221 is used for mounting the light source 7.
The driving motor shown in this embodiment may be specifically a worm gear reducer, that is, a worm gear transmission mechanism is disposed on the worm gear reducer, a worm wheel of the worm gear transmission mechanism is engaged with an arc-shaped rack, and the arc-shaped rack is disposed on an inner side surface of the arc-shaped fixing frame 21.
Therefore, when the driving motor shown in this embodiment provides the rotation driving, the movable base 221 can move along the extending direction of the arc-shaped fixed frame 21 based on the guiding function of the transmission and guiding mechanism 223 of the gear pair. Here, the light emitting direction of each light source 7 may be arranged along the radial direction of the arc-shaped fixing frame 21 in the embodiment. Because the size of the central angle corresponding to the arc-shaped track of the light source mounting seat 22 moving on the arc-shaped fixing frame 21 is 0-80 degrees, when the light source 7 moves along with the light source mounting seat 22, the incident angle of the light source 7 can be correspondingly adjusted within the range of 0-80 degrees.
Meanwhile, the arc-shaped fixing frames 21 shown in this embodiment include three arc-shaped fixing frames 21, which are circumferentially and uniformly distributed relative to the adapter plate 23, so that the projections of the three arc-shaped fixing frames 21 on the plane where the adapter plate 23 is located are uniformly distributed along the circumferential direction by 120 degrees. In this way, the light sources 7 disposed on the three arc-shaped fixing frames 21 can emit incident light to the sample 8 to be measured at different incident angles in different directions, so as to perform omnidirectional detection on the sample 8 to be measured.
As shown in fig. 1 and 4, the stage 1 of the present embodiment includes a fixed stage 11 and a movable stage 13; the mobile station 13 is provided with an attitude adjusting seat 14, and the attitude adjusting seat 14 is used for placing the sample 8 to be measured so as to adjust the placing attitude of the sample 8 to be measured; the moving stage 13 is mounted on the fixed stage 11 and is movable relative to the fixed stage 11 for moving the sample 8 to be detected to a detection station corresponding to the detection end of the spectrum detection apparatus 3.
The posture of the sample 8 to be measured shown in this embodiment can be understood as the positions of different areas on the sample 8 to be measured, for example: the placing posture of the sample 8 to be detected is specifically that the fruit stalk area is placed upwards, one end of the fruit stalk area deviating from the sample 8 to be detected is placed upwards, and the like.
Here, the posture adjustment base 14 shown in the present embodiment may be a manual adjustment base known in the art, and the posture of the sample 8 to be measured placed may be manually adjusted by a worker through the manual adjustment base. The posture adjusting base 14 may also be a manipulator, and a worker may also control the manipulator to automatically adjust the posture of the sample 8 to be measured.
Further, the posture adjustment base 14 shown in the present embodiment specifically includes a storage base 141 and a rolling adjustment mechanism 142; a surrounding structure 1411 is formed on the periphery of the storage seat 141, the storage seat 141 is used for placing a sample 8 to be detected in a limited area of the surrounding structure 1411, a light outlet 1412 is formed in the middle of the storage seat 141, and a detection end of the spectrum detection device 3 extends to the light outlet 1412; the rolling adjustment mechanism 142 comprises a friction shaft and a rotation driving mechanism, wherein the friction shaft is connected with the rotation driving mechanism and is positioned on the inner side of the enclosure 1411; the rolling adjustment mechanism 142 is provided in plurality.
Specifically, when the rolling adjustment mechanisms 142 are provided in plurality, the friction shafts on the rolling adjustment mechanisms 142 may be arranged in a circular structure connected end to end in sequence, and the sample 8 to be measured may be placed on the circular structure. When the rotary driving mechanism drives the friction shaft corresponding to the rotary driving mechanism to rotate, the posture of the sample 8 to be tested can be correspondingly controlled through the friction shaft. The rotation driving mechanism shown in this embodiment is preferably a servo motor, so that the friction shaft is controlled by the servo motor to rotate by a preset angle according to the control requirement, so as to adjust the sample 8 to be measured to the required placing posture.
Further, the posture adjusting base 14 shown in the embodiment further includes a spherical support 143, and the spherical support 143 is installed on the storage base 141 and is located inside the enclosure 1411; the envelope 1411 has a first side, a second side, a third side and a fourth side which are connected in sequence, and the spherical support 143 is close to the corner positions of the first side and the second side of the envelope 1411; two rolling adjustment mechanisms 142 are provided, wherein the friction shaft of one rolling adjustment mechanism 142 is arranged along the third side edge, and the friction shaft of the other rolling adjustment mechanism 142 is arranged along the fourth side edge. When the friction shafts on the two rolling adjusting mechanisms 142 respectively perform posture adjustment on the sample 8 to be measured, the spherical support 143 can support the sample 8 to be measured.
Further, as shown in fig. 1, the detection apparatus shown in the present embodiment is further provided with a housing 6; the shell 6 is covered on the fixed platform 11, an inlet 61 and an outlet 62 are respectively formed on the opposite side walls of the shell 6 along the first direction, and the inlet 61 and the outlet 62 are both provided with a light-shading curtain 63; the movable table 13 can reciprocate along the first direction, the movable table 13 is provided with a first station 100 and a second station 200 at intervals along the first direction, the first station 100 and the second station 200 are both provided with a posture adjusting base 14, and the second station 200 is positioned outside the shell 6 under the condition that the first station 100 is positioned at the detection station. So, based on the setting of first station 100 and second station 200, this embodiment can be when the detection station carries out the detection of the sample 8 that awaits measuring, prepares material on being in the station in the clamshell 6 outside, can promote detection efficiency by a wide margin.
It should be noted that in the present embodiment, the screw driving mechanism 12 may be provided on the fixed table 11, and the movable table 13 may be driven by the screw driving mechanism 12 to reciprocate in the first direction.
Further, as shown in fig. 3, the spectrum detecting apparatus 3 of the present embodiment includes a three-axis translation stage 31, a detecting optical fiber 32 and a fiber spectrometer; one end of the detection optical fiber 32 is connected with the triaxial translation stage 31 and is used for extending to the sample 8 to be detected, and the other end of the detection optical fiber 32 is connected with the optical fiber spectrometer.
Specifically, one end of the detection optical fiber 32 shown in the present embodiment is specifically a detection end of the spectrum detection apparatus 3. The present embodiment can adjust the spatial position of the detection end in the X-axis, Y-axis and Z-axis directions by the three-axis translation stage 31, wherein the X-axis, the Y-axis and the Z-axis are perpendicular to each other.
In one embodiment, the other end of the detection fiber 32 may be connected to a fiber splitter, which is then connected to a plurality of fiber spectrometers via transmission fibers.
In this embodiment, two fiber spectrometers can be specifically provided, wherein one fiber spectrometer is a fiber spectrometer introduced with a silicon material, the spectrum detection range of the fiber spectrometer is 1100nm, and the other fiber spectrometer is a fiber spectrometer introduced with an indium arsenide material, and the spectrum detection range of the fiber spectrometer is 1700 nm. Therefore, the optical fiber spectrometer based on two different spectrum detection ranges can cover the ultraviolet-near infrared region spectrum response region, effectively increases the measurable spectrum wavelength range, and has an analysis function besides collection.
Further, as shown in fig. 3, the present embodiment is further provided with a backlight calibration device 4; the background light calibration device 4 comprises a deflection mechanism 41, an attenuation sheet 42 and a calibration optical fiber 43; the deflection mechanism 41 is arranged on the objective table 1, and the attenuation sheet 42 is arranged at the deflection end of the deflection mechanism 41 and is used for receiving incident light of a light source; one end of the calibration fiber 43 is connected to the attenuation plate 42 and the other end is used for connection to a fiber optic spectrometer.
The deflection mechanism 41 shown in this embodiment is preferably an electromagnetic deflection mechanism, and based on the power-on control of the electromagnetic deflection mechanism, the deflection end of the electromagnetic deflection mechanism can be swung to the detection station or away from the detection station. Therefore, when the sample 8 to be detected is not placed at the detection station, the present embodiment may drive the attenuation sheet 42 through the deflection mechanism 41 to move the attenuation sheet 42 to the focus of the light source 7. In the embodiment, by arranging the attenuation sheet 42, the background light can be uniformly attenuated to the effective light intensity range of the fiber spectrometer by the attenuation sheet 42, so as to realize the collection of the background spectrum, so as to facilitate the calibration of the device.
Further, as shown in fig. 3, the present embodiment is further provided with a camera module 5, and the camera module 5 is configured to acquire video information of the current detection environment of the object stage 1. The camera module 5 may be a CCD camera known in the art. An operator can monitor the detection process of the sample 8 to be detected in the shell 6 based on the camera module 5, and feedback is provided for real-time adjustment in detection of the sample 8 to be detected.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A non-destructive optical inspection apparatus for aqueous samples, comprising:
the objective table is used for placing a sample to be detected;
the light source incidence device comprises an adjusting bracket, wherein the adjusting bracket is used for mounting a plurality of light sources, the light sources are used for emitting incident light towards the sample to be measured, and the adjusting bracket is used for respectively adjusting the positions and the light-emitting angles of the light sources;
the spectrum detection device is provided with a detection end, and the detection end is used for extending to the sample to be detected.
2. The apparatus according to claim 1, wherein the adjustable support comprises an arc-shaped fixing frame, a light source mounting seat and an adapter plate;
one end of the arc-shaped fixing frame is connected with the objective table, and the other end of the arc-shaped fixing frame is connected with the adapter plate; the arc-shaped fixing frames comprise a plurality of arc-shaped fixing frames which are distributed circumferentially relative to the adapter plate;
the light source mounting seat is mounted on the arc-shaped fixing frame and can move along the extending direction of the arc-shaped fixing frame, and the light source mounting seat is used for mounting the light source.
3. The apparatus according to claim 2, wherein the light source mounting base comprises a moving base, a gear driving mechanism and a guiding mechanism;
the gear driving mechanism comprises a driving motor and a gear pair, the gear pair comprises a gear and an arc-shaped rack, the arc-shaped rack is mounted on the arc-shaped fixing frame and arranged along the extending direction of the arc-shaped fixing frame, and the output end of the driving motor is connected with the gear;
the guide mechanism comprises a sliding block and an arc-shaped guide rail, the arc-shaped guide rail is arranged on the arc-shaped fixed frame and is arranged along the extension direction of the arc-shaped fixed frame, and the sliding block is slidably arranged on the arc-shaped guide rail along the extension direction;
the driving motor and the sliding block are respectively connected with the moving seat, and the moving seat is used for mounting the light source.
4. The apparatus according to claim 2, wherein the number of the arc-shaped fixing frames is three, and the three arc-shaped fixing frames are circumferentially and uniformly distributed relative to the adapter plate; the size of a central angle corresponding to an arc-shaped track of the light source mounting seat moving on the arc-shaped fixing frame is 0-80 degrees, and the direction of incident light emitted by the light source is along the radial direction of the arc-shaped fixing frame.
5. The apparatus according to claim 1, wherein the stage comprises a fixed stage and a movable stage;
the mobile station is provided with an attitude adjusting seat, and the attitude adjusting seat is used for placing the sample to be measured and adjusting the placing attitude of the sample to be measured; the mobile station is arranged on the fixed station and can move relative to the fixed station so as to move the sample to be detected to a detection station corresponding to the detection end of the spectrum detection device.
6. The apparatus according to claim 5, wherein the posture adjustment base comprises a storage base and a rolling adjustment mechanism;
an envelope structure is formed on the periphery of the storage seat, the storage seat is used for placing the sample to be detected in a limited area of the envelope structure, a light outlet is formed in the middle of the storage seat, and the detection end of the spectrum detection device extends to the light outlet;
the rolling adjusting mechanism comprises a friction shaft and a rotary driving mechanism, and the friction shaft is connected with the rotary driving mechanism and is positioned on the inner side of the envelope structure; the rolling adjusting mechanism is provided with a plurality of rolling adjusting mechanisms.
7. The apparatus according to claim 6, wherein the posture adjustment base further comprises a spherical support, the spherical support is mounted on the storage base and located inside the enclosure;
the enclosure structure is provided with a first side edge, a second side edge, a third side edge and a fourth side edge which are sequentially connected, and the spherical support is close to the corner positions of the first side edge and the second side edge of the enclosure structure;
the rolling adjusting mechanisms are two, the friction shafts of one rolling adjusting mechanism are arranged along the third side edge, and the friction shafts of the other rolling adjusting mechanism are arranged along the fourth side edge.
8. The apparatus for nondestructive optical examination of an aqueous sample according to claim 5, further comprising: a housing; the shell cover is arranged on the fixed table, an inlet and an outlet are respectively formed in the opposite side walls of the shell cover along the first direction, and a light shading curtain is arranged on each of the inlet and the outlet;
the movable table can reciprocate along the first direction, the movable table is provided with a first station and a second station at intervals along the first direction, the first station and the second station are both provided with posture adjusting seats, and the second station is positioned on the outer side of the shell cover under the condition that the first station is positioned on the detection station.
9. The apparatus for the non-destructive optical examination of an aqueous sample according to any one of claims 1 to 8, wherein said spectroscopic examination apparatus comprises a three-axis translation stage, an examination optical fiber and a fiber optic spectrometer;
one end of the detection optical fiber is connected with the triaxial translation stage and used for extending to the sample to be detected, and the other end of the detection optical fiber is connected with the optical fiber spectrometer.
10. The apparatus for nondestructive optical examination of an aqueous sample according to any one of claims 1 to 8, further comprising: a backlight calibration device; the background light calibration device comprises a deflection mechanism, an attenuation sheet and a calibration optical fiber; the deflection mechanism is arranged on the objective table, and the attenuation sheet is arranged at the deflection end of the deflection mechanism and used for receiving incident light of the light source; one end of the calibration optical fiber is connected with the attenuation sheet, and the other end of the calibration optical fiber is used for being connected with an optical fiber spectrometer;
further comprising: the camera module is used for acquiring video information of the current detection environment of the objective table;
the light source includes: the fan, the wide-spectrum light source and the focusing lens are packaged into a whole, the focusing lens is located on the light emitting side of the wide-spectrum light source, and the fan is located on the light emitting side deviating from the wide-spectrum light source.
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| CN202110139436.9A CN114839138A (en) | 2021-02-01 | 2021-02-01 | Nondestructive optical detection device for water-containing sample |
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| CN202110139436.9A CN114839138A (en) | 2021-02-01 | 2021-02-01 | Nondestructive optical detection device for water-containing sample |
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| CN202110139436.9A Pending CN114839138A (en) | 2021-02-01 | 2021-02-01 | Nondestructive optical detection device for water-containing sample |
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