CN116990236B - Sampling control method, device and system - Google Patents

Abstract

The invention provides a sampling control method, a device and a system, which relate to the field of spectrum acquisition, and the method comprises the following steps: the sampling control method is realized based on a sampling control device, the sampling control device is respectively connected with a shifting unit and a sampling detection unit, and the shifting unit is connected with a moving mirror. The sampling control method comprises the following steps: determining a target spectral resolution corresponding to a unit to be sampled; determining a target scanning mode according to the unit attribute of the unit to be sampled; repeating the circulating step, and indicating to acquire all data corresponding to the unit to be sampled until the preset times are reached; and processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled. According to the invention, different scanning modes are determined according to different unit attributes of different units to be sampled, forward scanning and backward scanning are guided according to the spectrum resolutions of different units to be sampled and the corresponding scanning modes, so that the scanning efficiency is improved under the condition of ensuring the scanning precision, and the scanning sampling requirement under the current environment is met.

Description

Sampling control method, device and system

Technical Field

The present invention relates to the field of spectrum acquisition, and in particular, to a method, apparatus, and system for sampling control.

Background

In actual use, because the spectrum resolutions of different samples to be sampled are different during scanning, and the required scanning modes of different samples to be sampled are different, the scanning efficiency of the scanning of the samples to be sampled can not be improved under the condition of ensuring the scanning precision, and the scanning precision is greatly reduced under the condition of ensuring the scanning efficiency, so that the current sampling requirement can not be met.

Disclosure of Invention

The invention provides a sampling control method, a sampling control device and a sampling control system, which are used for solving the technical problem that the scanning precision and the scanning efficiency cannot be considered simultaneously in the prior art.

In a first aspect, the present invention provides a sampling control method, where the sampling control method is implemented based on a sampling control device, the sampling control device is respectively connected to a displacement unit and a sampling detection unit, and the displacement unit is connected to a moving mirror;

the sampling control method comprises the following steps:

determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution;

determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled;

Repeatedly executing a circulation step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached;

processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled;

the cycling step includes:

in the process that the shifting unit drives the moving mirror to reciprocate, forward scanning is carried out on the shifting unit by taking a zero optical path difference position as a starting point so as to acquire data corresponding to the unit to be sampled, counting is carried out by taking a preset multiple of interference laser wavelength as a unit, and forward scanning is stopped and a forward count value is determined after the target spectral resolution is reached;

determining a reverse count value according to the forward count value and the target scanning mode;

and indicating the shifting unit to execute reverse scanning according to the reverse count value so as to acquire data corresponding to the unit to be sampled, and returning to the zero optical path difference position after the reverse scanning is completed.

According to the sampling control method of the present invention, the unit attribute includes a gaseous attribute, a liquid attribute and a solid attribute, and determining, according to the unit attribute of the unit to be sampled, a target scan mode corresponding to the unit attribute includes:

Under the condition that the unit to be sampled is determined to be a gaseous substance, determining a target scanning mode corresponding to the unit attribute to be a gaseous scanning mode;

under the condition that the unit to be sampled is determined to be a liquid substance, determining that a target scanning mode corresponding to the unit attribute is a liquid scanning mode;

and under the condition that the unit to be sampled is determined to be a solid substance, determining that a target scanning mode corresponding to the unit attribute is a solid scanning mode.

According to the sampling control method of the present invention, when the target scanning mode is a gaseous scanning mode, the determining a reverse count value according to the forward count value and the target scanning mode includes:

determining a first reverse scanning value according to the forward counting value and a first preset coefficient;

and determining the reverse count value according to the first reverse scanning value and the forward count value.

According to the sampling control method of the present invention, when the target scanning mode is a liquid scanning mode, the determining a reverse count value according to the forward count value and the target scanning mode includes:

determining a second reverse scanning value according to the forward counting value and a second preset coefficient;

Determining the reverse count value according to the second reverse scan value and the forward count value;

the first preset coefficient is greater than or equal to the second preset coefficient.

According to the sampling control method of the present invention, when the target scanning mode is a solid-state scanning mode, the determining a reverse count value according to the forward count value and the target scanning mode includes:

determining a third reverse scanning value according to the forward counting value and a third preset coefficient;

determining the reverse count value according to the third reverse scan value and the forward count value;

the second preset coefficient is greater than or equal to the third preset coefficient.

According to the sampling control method of the invention, the sampling control device is respectively connected with the white light equipment and the white light detector;

before counting the laser wavelength when performing the forward scan, the method further comprises:

in the process that the shifting unit drives the moving mirror to reciprocate, the white light equipment is instructed to be started, and white light interference information is obtained according to the white light detector;

processing the white light interference information by adopting a maximum detection algorithm to obtain the zero optical path difference position;

Indicating to turn off the white light device.

According to the sampling control method of the present invention, the processing all data according to fourier transform, obtaining the target spectrum information of the unit to be sampled, includes:

processing all data according to a preset mode, and obtaining original information corresponding to each data;

for each piece of original information, processing the original information according to Fourier transformation to obtain target spectrum information;

the preset mode comprises at least one of symmetrical processing, noise elimination processing, apodization processing and phase correction of the unilateral acquired data.

In a second aspect, there is provided a sampling control device, the sampling control device being connected to a displacement unit and a sampling detection unit, respectively, the displacement unit being connected to a moving mirror;

the sampling control device includes:

the first determining unit is used for determining target spectral resolution corresponding to the unit to be sampled from the corresponding relation of the preset spectral resolution;

the second determining unit is used for determining a target scanning mode according to the substance form of the unit to be sampled, wherein the substance form comprises a gas state, a liquid state and a solid state;

The repeating unit is used for repeatedly executing the circulating step until the preset times are reached, and the sampling detection unit is instructed to acquire all data corresponding to the unit to be sampled;

the acquisition unit is used for processing all data according to Fourier transformation and acquiring target spectrum information of the unit to be sampled;

the repeating unit includes:

the first determining module is used for counting the shifting unit by taking a preset multiple of interference laser wavelength as a unit when the shifting unit is subjected to forward scanning by taking a zero optical path difference position as a starting point in the process of indicating the shifting unit to drive the moving mirror to reciprocate until the target spectral resolution is reached, and then determining a forward count value;

the second determining module is used for determining a reverse count value according to the forward count value and the target scanning mode;

and the execution module is used for returning to the zero optical path difference position after executing reverse scanning according to the reverse count value.

In a third aspect, a sampling control system is provided, including a light source unit, a semi-transparent and semi-reflective unit, a static mirror, a moving mirror, a shifting unit, a unit to be sampled, a sampling detection unit, a laser reflection unit, a laser detection unit and the sampling control device;

The semi-transparent and semi-reflective unit is respectively connected with the light source unit, the static mirror, the moving mirror, the unit to be sampled and the laser detection unit;

the to-be-sampled unit is connected with the sampling detection unit, and the laser detection unit is respectively connected with the sampling control device and the laser reflection unit;

the wide-spectrum light source emitted by the light source unit passes through the half-transmission half-reflection unit to form a first light source and a second light source, wherein the first light source is reflected to the half-transmission half-reflection unit through the static mirror and is irradiated to the unit to be sampled after being combined with the second light source to the half-transmission half-reflection unit through the moving mirror, and the first light source is irradiated to the sampling detection unit through the unit to be sampled;

the laser light source emitted by the laser unit passes through the half-transmission half-reflection unit to form a third light source and a fourth light source, wherein the third light source is reflected to the half-transmission half-reflection unit through the static mirror, and is reflected to the half-transmission half-reflection unit through the moving mirror with the fourth light source to be combined, and then passes through the laser reflection unit to irradiate the laser detection unit;

The light source unit and the laser unit are arranged at the first side end of the half-transmission half-reflection unit;

the static mirror is arranged at the second side end of the half-transmission half-reflection unit;

the moving mirror, the shifting unit and the sampling control device are arranged at the third side end of the semi-transparent and semi-reflective unit;

the laser detection unit, the unit to be sampled, the laser reflection unit and the sampling detection unit are arranged at the fourth side end of the semi-transparent and semi-reflective unit;

the straight line formed by the first side end and the third side end is perpendicular to the straight line formed by the second side end and the fourth side end.

According to the sampling control system provided by the invention, the sampling control system further comprises white light equipment and a white light detector, and the sampling control device is connected with the white light equipment and the white light detector;

the white light device is arranged at the fourth side end, and the white light detector is arranged at the first side end.

The invention provides a sampling control method, a device and a system, which are used for determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution, determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, repeatedly executing the cyclic steps as follows, counting the shifting unit by taking a preset multiple of interference laser wavelength as a unit when the shifting unit is executed by taking a zero optical path difference position as a starting point in the process of indicating the shifting unit to drive the moving mirror to reciprocate, determining a forward count value after reaching the target spectral resolution, and determining a reverse count value according to the forward count value and the target scanning mode; and indicating the shifting unit to execute reverse scanning according to the reverse count value, returning to the zero optical path difference position after finishing the reverse scanning until reaching the preset times, and acquiring the target spectrum information of the unit to be sampled. According to the invention, different scanning modes can be determined according to different unit attributes of different units to be sampled, and forward scanning and backward scanning are realized according to the spectrum resolutions of different units to be sampled and the corresponding scanning modes, so that the improvement of the scanning efficiency is realized under the condition of ensuring the scanning precision, and the scanning sampling requirement under the current environment is met.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic flow chart of a sampling control method according to the present invention;

FIG. 2 is a schematic flow chart of determining a target scan pattern according to the present invention;

FIG. 3 is a second flow chart of the sampling control method according to the present invention;

FIG. 4 is a schematic diagram of a sampling control device according to the present invention;

FIG. 5 is a schematic diagram of a sampling control system according to the present invention;

FIG. 6 is a second schematic diagram of a sampling control system according to the present invention;

fig. 7 is a schematic structural diagram of an electronic device provided by the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The Fourier spectrometer is a spectrum measurement system developed based on the Fourier transform principle, can be used for quantitative or qualitative analysis on a sample, is widely applied to the analysis and identification fields of various industries, and consists of an interferometer and a computer, wherein the computer is used for analyzing acquired signals or images and the like, a broad spectrum light beam which is interfered by the interferometer is used for detecting the sample, and an important part in the interferometer is that the broad spectrum light is divided into two beams, one beam irradiates on a static reflector, the other beam irradiates on a moving reflector, and the two beams irradiate on the sample to form interference signals. However, in the existing scanning, a single-side scanning or double-side scanning mode is generally adopted to collect sample data, however, how to select single-side scanning or double-side scanning, how to control scanning steps of single-side scanning or double-side scanning are all determined by means of manual experience, specific analysis cannot be performed according to actual unit data of a unit to be sampled, and therefore, improvement of scanning efficiency cannot be achieved under the condition of ensuring scanning accuracy.

The sampling control method comprises the following steps:

and step 101, determining target spectral resolution corresponding to the unit to be sampled from the corresponding relation of the preset spectral resolution.

In step 101, the correspondence between each preset sampling unit and each preset spectral resolution is stored in the correspondence between the preset spectral resolution and each preset spectral resolution, that is, the required spectral resolution is different for different units to be sampled, for example, the required spectral resolution is different for different material varieties or different material morphologies, typically, for units to be sampled with gas properties, a high spectral resolution needs to be adopted, and for obtaining a high spectral resolution, a single-side scanning mode needs to be adopted; for the unit to be sampled with solid property, high resolution is not needed, and medium resolution or low resolution can be adopted, and bilateral scanning can be adopted at the moment.

Optionally, the determining of the target spectrum resolution corresponding to the unit to be sampled is to determine the scanning distance during the forward scanning and the backward scanning according to the target spectrum resolution, the bilateral scanning adopts the same scanning mode of the forward scanning and the backward scanning with the zero point as the center, and the unilateral scanning adopts the scanning mode of the forward scanning and the backward scanning with the zero point as the center and different scanning distances.

Step 102, determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled.

In step 102, the unit attribute is used to mark the material form of the unit to be sampled, where the material form may be divided into a liquid state, a gas state and a solid state, and in other embodiments, may be further divided into a liquid state, a gas state, a solid state, a semi-liquid state and a semi-liquid state, and optionally, the unit attribute may also be used to mark the material use of the unit to be sampled, for example, metal element content detection, non-metal material and powder material analysis or biological tissue analysis, and the target scan mode corresponding to the unit attribute is determined according to different material uses of the unit to be sampled, where the target scan mode includes a scan mode in which after determining a forward scan value according to a target spectral resolution, a reverse scan value is determined according to different preset coefficients corresponding to different target scan modes and the forward scan value, and scanning is performed according to the forward scan value and the reverse scan value.

And 103, repeatedly executing the circulating step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached.

In step 103, the circulating step includes taking a zero optical path difference position as a starting point in the process that the shifting unit drives the moving mirror to reciprocate, performing forward scanning on the shifting unit to obtain data corresponding to the unit to be sampled, counting by taking a preset multiple of interference laser wavelength as a unit, stopping the forward scanning until the target spectral resolution is reached, and determining a forward count value; determining a reverse count value according to the forward count value and the target scanning mode; and indicating the shifting unit to execute reverse scanning according to the reverse count value so as to acquire data corresponding to the unit to be sampled, and returning to the zero optical path difference position after the reverse scanning is completed.

In the process that the shifting unit drives the moving mirror to reciprocate, the invention firstly obtains the zero optical path difference position according to the detection algorithm of the preset software, starts forward scanning by taking the zero optical path difference position as a starting point, counts the shifting unit by taking the preset multiple of the interference laser wavelength as a unit when executing forward scanning, namely counts from 0, counts 1 after each time of scanning the interference laser wavelength of the preset multiple, and determines the forward count value until reaching the target spectral resolution.

Optionally, determining a reverse count value according to the forward count value and the target scan mode, where the target scan mode determines a preset coefficient, for example, the preset coefficient is 7, and if the forward count value is determined to be 1000, determining the reverse count value to be 7000 according to the forward count value and the target scan mode, where the scan range of the target scan mode is 1000 to-6000.

Optionally, the instructing the shift unit performs reverse scanning according to the reverse count value, and returns to the zero optical path difference position after completion of the reverse scanning. The invention executes 7000 steps when executing reverse scanning, but takes the zero optical path difference position as a starting point, and in fact, after executing 7000 steps of reverse scanning, the farthest distance is 6000 steps away from the zero optical path difference position when executing reverse scanning, so the invention also needs to return to the zero optical path difference position from the farthest distance position after completing reverse scanning, so as to execute next unilateral scanning, repeatedly execute the unilateral scanning for preset times, and instruct the sampling detection unit to acquire all data corresponding to the unit to be sampled.

And 104, processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled.

Optionally, the processing all data according to fourier transform, obtaining the target spectrum information of the unit to be sampled includes:

processing all data according to a preset mode, and obtaining original information corresponding to each data;

for each piece of original information, processing the original information according to Fourier transformation to obtain target spectrum information;

the preset mode comprises at least one of symmetrical processing, noise elimination processing, apodization processing and phase correction of the unilateral acquired data.

Optionally, the invention can select at least one of noise removing processing, apodization processing and phase correction to process all data according to the actual acquired data, obtain the original information corresponding to each data, further process the original data according to Fourier transformation after preprocessing the data, obtain the target spectrum information, and only screen out the needed data to carry out subsequent Fourier transformation processing by preprocessing all the data, thereby improving the processing efficiency.

The invention provides a sampling control method, which comprises the steps of determining a target spectrum resolution corresponding to a unit to be sampled from a corresponding relation of a preset spectrum resolution, determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, repeatedly executing the circulation steps as follows, counting the shifting unit by taking a preset multiple of interference laser wavelength as a unit when the shifting unit is executed by taking a zero optical path difference position as a starting point in the process of indicating the shifting unit to drive the moving mirror to reciprocate until the target spectrum resolution is reached, determining a forward count value according to the forward count value and the target scanning mode; and indicating the shifting unit to execute reverse scanning according to the reverse count value, returning to the zero optical path difference position after finishing the reverse scanning until reaching the preset times, and acquiring the target spectrum information of the unit to be sampled. According to the invention, different scanning modes can be determined according to different unit attributes of different units to be sampled, and forward scanning and backward scanning are realized according to the spectrum resolutions of different units to be sampled and the corresponding scanning modes, so that the improvement of the scanning efficiency is realized under the condition of ensuring the scanning precision, and the scanning sampling requirement under the current environment is met.

Fig. 2 is a schematic flow chart of determining a target scan mode according to the present invention, where the unit attribute includes a gaseous attribute, a liquid attribute and a solid attribute, and determining, according to the unit attribute of the unit to be sampled, the target scan mode corresponding to the unit attribute includes:

step 201, determining that a target scanning mode corresponding to the unit attribute is a gaseous scanning mode under the condition that the unit to be sampled is determined to be a gaseous substance.

In step 201, the present invention may acquire the recognition result output by the preset substance form recognition model by inputting the image data of the unit to be sampled to the preset substance form recognition model, where the preset substance form recognition model is determined according to the sample image data and the sample recognition result training corresponding to the sample image data. In other embodiments, the recognition weight of the unit to be sampled may be obtained by combining a weight sensor, whether the recognition result is accurate may be determined according to the recognition weight, or the recognition result output by the preset semantic recognition model may be obtained by inputting the text description feature of the unit to be sampled to the preset semantic recognition model, and specifically, the preset semantic recognition model is determined according to the sample text description feature and the sample recognition result training corresponding to the sample text description feature.

Step 202, determining that a target scanning mode corresponding to the unit attribute is a liquid scanning mode under the condition that the unit to be sampled is determined to be a liquid substance.

In step 202, since there are two modes of single-side scanning and double-side scanning, the single-side scanning is suitable for high resolution acquisition, the double-side scanning is suitable for low resolution acquisition, in practical application, some identification results need to be acquired with high resolution, and some identification results do not need to be acquired with high resolution. According to the invention, when the identification result is a gaseous substance, the target scanning mode corresponding to the unit attribute is determined to be a gaseous scanning mode, the gaseous scanning mode is single-side scanning, when the identification result is a liquid substance, the target scanning mode corresponding to the unit attribute is determined to be a liquid scanning mode, when the identification result is a solid substance, the target scanning mode corresponding to the unit attribute is determined to be a solid scanning mode, and both the liquid scanning mode and the solid scanning mode are determined to be double-side scanning modes.

Step 203, determining that a target scanning mode corresponding to the unit attribute is a solid scanning mode when the unit to be sampled is determined to be a solid substance.

In step 203, although both the liquid scanning mode and the solid scanning mode are bilateral scanning, the liquid scanning mode and the solid scanning mode are different in preset coefficients, so that the counter value corresponding to the liquid scanning mode and the solid scanning mode is different after the positive counter value is determined.

Alternatively, because the resolution required by the solid, liquid and gas is not absolute, the invention can also determine that the target scanning mode corresponding to the liquid attribute is a high-resolution scanning mode in the case that the identification result is a gaseous substance; under the condition that the identification result is a liquid substance, the target scanning mode is a medium resolution mode; and in the case that the identification result is a solid substance, the target scanning mode is a low-resolution scanning mode.

The invention can also consider three different scanning modes as three different resolution modes, namely a high resolution mode, a medium resolution mode and a low resolution mode, for example, the high resolution mode adopts a single-side scanning mode, and the scanning range of the high resolution mode is 1000 to-6000; the medium resolution mode adopts a bilateral scanning mode, such as a scanning range of 1000 to-1000; the low resolution mode employs a bilateral scanning mode, such as a scanning range of 500 to-500.

Optionally, in the case that the target scan mode is a gaseous scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a first reverse scanning value according to the forward counting value and a first preset coefficient;

and determining the reverse count value according to the first reverse scanning value and the forward count value.

Optionally, if the preset coefficient is 6 and the forward count value is 500, determining that a first reverse scan value is 3000 according to the forward count value and a first preset coefficient, determining that the reverse count value is 3500 according to the sum of the first reverse scan value and the forward count value, and at this time, the scanning range of the gaseous scan mode is-3000-500.

Optionally, in the case that the target scanning mode is a liquid scanning mode, the determining a reverse count value according to the forward count value and the target scanning mode includes:

determining a second reverse scanning value according to the forward counting value and a second preset coefficient;

determining the reverse count value according to the second reverse scan value and the forward count value;

the first preset coefficient is greater than or equal to the second preset coefficient.

Optionally, the first preset coefficient is greater than or equal to the second preset coefficient, the second preset coefficient may be 1.5, if the forward count value is 1000, a second reverse scan value is determined to be 1500 according to the forward count value and the second preset coefficient, and the reverse count value is determined to be 2500 according to the second reverse scan value and the forward count value, where the scanning range of the liquid scan mode is-1500 to 1000.

Optionally, the second preset coefficient may be 1, if the forward count value is 1000, determining that a second reverse scanning value is 1000 according to the forward count value and the second preset coefficient, and determining that the reverse count value is 2000 according to the second reverse scanning value and the forward count value, where the scanning range of the liquid scanning mode is-1000 to 1000.

Optionally, in the case that the target scan mode is a solid-state scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a third reverse scanning value according to the forward counting value and a third preset coefficient;

determining the reverse count value according to the third reverse scan value and the forward count value;

The second preset coefficient is greater than or equal to the third preset coefficient.

Optionally, the second preset coefficient is greater than or equal to the third preset coefficient, the third preset coefficient may be 1, if the forward count value is 1000, a third reverse scan value is determined to be 1000 according to the forward count value and the third preset coefficient, and the reverse count value is determined to be 2000 according to the third reverse scan value and the forward count value, where the scanning range of the solid scan mode is-1000 to 1000.

FIG. 3 is a second flow chart of the sampling control method according to the present invention, wherein the sampling control device is respectively connected to a white light device and a white light detector;

before counting the laser wavelength when performing the forward scan, the method further comprises:

step 301, in the process that the shift unit drives the motion mirror to reciprocate, the white light device is instructed to be started, and white light interference information is obtained according to the white light detector.

In step 301, the white light device, the laser unit and the light source unit are used for emitting a light source, and the sampling control system provided by the invention shares an interferometer, and the displacement unit drives the moving mirror to reciprocate under the driving of the sampling control device, and in the process that the displacement unit drives the moving mirror to reciprocate, the sampling control device instructs to start the white light device so as to obtain white light interference information according to the white light detector.

And 302, processing the white light interference information by adopting a maximum detection algorithm to obtain the zero optical path difference position.

In step 302, the present invention locates the zero optical path difference position by the interference fringe detection maximum value of the white light, and after the zero optical path difference position is obtained, the tasks of the white light device and the white light detector are completed.

Step 303, instructing to turn off the white light device.

In step 303, after the task of determining the white light device and the white light detector is completed, the sampling control device instructs to turn off the white light device to stop emitting white light, where the white light source may be a halogen lamp, or may be replaced by another broad spectrum light source, or may be a combination of multiple light sources.

Fig. 4 is a schematic structural diagram of a sampling control device provided by the invention, and the sampling control device is provided, wherein the sampling control device is respectively connected with a displacement unit and a sampling detection unit, and the displacement unit is connected with a moving mirror; the sampling control device 4 includes a first determining unit 41, where the first determining unit 41 is configured to determine a target spectral resolution corresponding to the unit to be sampled from a corresponding relationship of preset spectral resolutions, and the working principle of the first determining unit 41 may refer to the foregoing step 101 and will not be described herein.

The sampling control device 4 further includes a second determining unit 42, where the second determining unit 42 is configured to determine a target scanning mode according to a substance form of the unit to be sampled, where the substance form includes a gas state, a liquid state and a solid state, and the working principle of the second determining unit 42 may refer to the foregoing step 102, which is not repeated herein.

The sampling control device 4 further includes a repeating unit 43, where the repeating unit is configured to repeatedly execute the cycling step until reaching the preset number of times, instruct the sampling detection unit to obtain all data corresponding to the unit to be sampled, and the working principle of the repeating unit 43 may refer to the foregoing step 103, which is not described herein again.

The sampling control device 4 further includes an obtaining unit 44, where the obtaining unit is configured to process all data according to fourier transform to obtain the target spectrum information of the unit to be sampled, and the working principle of the obtaining unit 44 may be omitted herein with reference to the foregoing step 104.

The repeating unit 43 includes:

a first determining module 431, configured to count, in a unit of a preset multiple of an interference laser wavelength when the shifting unit performs forward scanning, with a zero optical path difference position as a starting point in a process of indicating the shifting unit to drive the moving mirror to reciprocate, until the target spectral resolution is reached, and determine a forward count value;

A second determining module 432, configured to determine a reverse count value according to the forward count value and the target scan pattern;

and the execution module 433 is configured to return to the zero optical path difference position after executing the reverse scanning according to the reverse count value.

The invention provides a sampling control device, which is used for determining a target spectrum resolution corresponding to a unit to be sampled from a corresponding relation of a preset spectrum resolution, determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, repeatedly executing the steps of counting the shifting unit by taking a zero optical path difference position as a starting point and taking a preset multiple of interference laser wavelength as a unit when the shifting unit is used for executing forward scanning in the process of indicating the shifting unit to drive the moving mirror to reciprocate until the target spectrum resolution is reached, determining a forward count value, and determining a reverse count value according to the forward count value and the target scanning mode; and indicating the shifting unit to execute reverse scanning according to the reverse count value, returning to the zero optical path difference position after finishing the reverse scanning until reaching the preset times, and acquiring the target spectrum information of the unit to be sampled. According to the invention, different scanning modes can be determined according to different unit attributes of different units to be sampled, and forward scanning and backward scanning are realized according to the spectrum resolutions of different units to be sampled and the corresponding scanning modes, so that the improvement of the scanning efficiency is realized under the condition of ensuring the scanning precision, and the scanning sampling requirement under the current environment is met.

Fig. 5 is a schematic structural diagram of a sampling control system provided by the present invention, where the sampling control system includes a light source unit 51, a half-transparent and half-reflective unit 52, a stationary mirror 53, a moving mirror 54, a shift unit 55, a unit to be sampled 56, a sampling detection unit 57, a laser unit 58, a laser reflection unit 59, a laser detection unit 60, and the sampling control device 4.

Optionally, the light source unit 51 is configured to emit a broad spectrum light source, the half-transmitting half-reflecting unit 52 may divide the light entering the half-transmitting half-reflecting unit 52 into two beams according to the characteristic of half-transmitting half-reflecting, the static mirror 53 is fixedly disposed on one side of the half-transmitting half-reflecting unit 52, and is configured to reflect light, and the moving mirror 54 is relatively fixed to the displacement unit 55 and is capable of performing reciprocating motion under the action of a servo motor of the displacement unit 55. The stationary mirror 53 and the moving mirror 54 are composed of a plane mirror or a pyramid mirror, or other devices capable of reflecting light.

The unit to be sampled 56 is a detection object for spectrum analysis, the sampling detection unit 57 is configured to receive interference light passing through the unit to be sampled 56, the laser unit 58 is configured to emit laser light, the laser reflection unit 59 is configured to reflect the laser light, the laser detection unit 60 is configured to receive the laser light after beam combination from the half-transmitting and half-reflecting unit 52, and the sampling control device 4 is configured to servo-control the shift unit 55 according to two feedback signals, namely an interference signal and a motor speed encoding signal, so as to generate a smooth reciprocating motion.

The half-transmitting and half-reflecting unit 52 is respectively connected with the light source unit 51, the static mirror 53, the moving mirror 54, the unit to be sampled 56 and the laser detection unit 60. The unit to be sampled 56 is connected to the sampling detection unit 57, and the laser detection unit 60 is connected to the sampling control device 4 and the laser reflection unit 59, respectively.

Optionally, a voice coil motor of the displacement unit 55 is used to drive the moving mirror 54 to form interference light, where the voice coil motor may be a piezo-ceramic displacement stage, a servo motor, a stepper motor or other devices with similar functions, and the voice coil motor adopts closed-loop control, and a feedback signal is provided by a grating scale encoder of the voice coil motor or an interference signal of the laser detection unit 60.

Alternatively, the laser detection unit 60 may be a one-dimensional detector or a two-dimensional detector, and when the laser detection unit 60 is a two-dimensional detector, an optical path difference exists between a pixel outside the optical axis and a pixel above the optical axis, and the optical path difference may be calculated and corrected according to a triangle relationship.

Alternatively, the broad spectrum light source emitted by the light source unit 51 passes through the half-transmission half-reflection unit 52 to form a first light source and a second light source, where the first light source is reflected to the half-transmission half-reflection unit 52 by the static mirror 53, and is reflected to the half-transmission half-reflection unit 52 by the moving mirror 54 with the second light source to be combined, and then irradiated to the unit to be sampled 56, and irradiated to the sampling detection unit 57 by the unit to be sampled 56. The light source unit 51 emits wide-spectrum light, the wide-spectrum light enters the half-transmission half-reflection unit 52 and is divided into two beams to be respectively irradiated on the static mirror 53 and the moving mirror 54, the beams are reflected and are synthesized by the half-transmission half-reflection unit 52 to be irradiated on the unit 56 to be sampled, the beams are detected by the unit 56 to be sampled and are converted into electric signals by the sampling detection unit 57, and the electric signals are processed to obtain spectrum information.

Optionally, the laser light source emitted by the laser unit 58 forms a third light source and a fourth light source after passing through the half-transmitting half-reflecting unit 52, the third light source is reflected to the half-transmitting half-reflecting unit 52 by the static mirror 53, and is reflected to the half-transmitting half-reflecting unit 52 by the moving mirror 54 together with the fourth light source to be combined, and then passes through the laser reflecting unit 59 to be irradiated on the laser detection unit 60. The laser unit 58 emits a laser light source to enter the adoption control system for interference, and is converted into an electrical signal by the laser detection unit 60, the laser detection unit 60 converts the detected laser interference signal into a TTL signal or an orthogonal sine cosine signal, and the TTL signal or the orthogonal sine cosine signal and the code signal in the shift unit 55 are connected into the sampling control device 4 together, and the laser emitted by the laser unit 58 has good wavelength and intensity stability and is used for positioning the position of the moving mirror 54.

Optionally, the sampling control device 4 is configured to drive the displacement unit 55 to drive the moving mirror 54 to reciprocate, and obtain an interference signal during the reciprocation according to the laser detection unit 60. The shift unit 55 drives the moving mirror 54 to reciprocate and form signal interference of broad spectrum light and laser, the laser forms cosine signals after interference due to long interference distance, and the cosine signals can be converted into square wave signals after shaping and are connected to the sampling control device 4.

The light source unit 51 and the laser unit 58 are disposed at a first side end of the half mirror unit 52;

the stationary mirror 53 is disposed at the second side end of the half-transmitting and half-reflecting unit 52;

the moving mirror 54, the shift unit 55, and the sampling control device 4 are disposed at a third side end of the half mirror 52;

the laser detection unit 60, the unit to be sampled 56, the laser reflection unit 59, and the sampling detection unit 57 are disposed at a fourth side end of the half-transmission unit 52;

the straight line formed by the first side end and the third side end is perpendicular to the straight line formed by the second side end and the fourth side end.

Alternatively, the manner of the four side ends of the half-transmitting and half-reflecting unit 52 is not limited in any way, and it is only required that the straight line formed by the first side end and the third side end is perpendicular to the straight line formed by the second side end and the fourth side end. After the above components are arranged in the above manner, a wide-spectrum light source emitted by the light source unit 51 is formed into a first light source and a second light source after passing through the half-transmission half-reflection unit 52, the first light source is reflected to the half-transmission half-reflection unit 52 by the static mirror 53, and is reflected to the half-transmission half-reflection unit 52 by the moving mirror 54 with the second light source to be combined, and then irradiated to the unit to be sampled 56, and irradiated to the sampling detection unit 57 by the unit to be sampled 56; it may also be realized that the laser light source emitted by the laser unit 58 passes through the half-transmitting and half-reflecting unit 52 to form a third light source and a fourth light source, where the third light source is reflected to the half-transmitting and half-reflecting unit 52 by the static mirror 53, and is reflected to the half-transmitting and half-reflecting unit 52 by the moving mirror 54 together with the fourth light source to be combined, and then passes through the laser reflecting unit 59 to be irradiated on the laser detection unit 60.

Fig. 6 is a second schematic structural diagram of a sampling control system according to the present invention, optionally, the sampling control system further includes a white light device 61 and a white light detector 62, and the sampling control device is connected to the white light device 61 and the white light detector 62;

the white light device 61 is disposed at the fourth side end, and the white light detector 62 is disposed at the first side end.

The invention provides a sampling control system, which is characterized in that a target spectral resolution corresponding to a unit to be sampled is determined from a corresponding relation of preset spectral resolutions, a target scanning mode corresponding to the unit attribute is determined according to the unit attribute of the unit to be sampled, the cyclic steps are repeatedly executed, in the process of indicating a shifting unit to drive a moving mirror to reciprocate, a zero optical path difference position is used as a starting point, when the shifting unit is used for executing forward scanning, counting is carried out by taking a preset multiple of interference laser wavelength as a unit, a forward count value is determined until the target spectral resolution is reached, and a reverse count value is determined according to the forward count value and the target scanning mode; and indicating the shifting unit to execute reverse scanning according to the reverse count value, returning to the zero optical path difference position after finishing the reverse scanning until reaching the preset times, and acquiring the target spectrum information of the unit to be sampled. According to the invention, different scanning modes can be determined according to different unit attributes of different units to be sampled, and forward scanning and backward scanning are realized according to the spectrum resolutions of different units to be sampled and the corresponding scanning modes, so that the improvement of the scanning efficiency is realized under the condition of ensuring the scanning precision, and the scanning sampling requirement under the current environment is met.

Fig. 7 is a schematic structural diagram of an electronic device provided by the present invention. As shown in fig. 7, the electronic device may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform a sampling control method comprising: determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution; determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled; repeatedly executing a circulation step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached; processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled; the cycling step includes: in the process of indicating the shifting unit to drive the moving mirror to reciprocate, counting the shifting unit by taking a zero optical path difference position as a starting point and taking a preset multiple of interference laser wavelength as a unit when forward scanning is performed, until the target spectral resolution is reached, and determining a forward count value; determining a reverse count value according to the forward count value and the target scanning mode; and the shifting unit is instructed to execute reverse scanning according to the reverse count value, and returns to the zero optical path difference position after the reverse scanning is completed.

Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

In another aspect, the present invention also provides a computer program product, where the computer program product includes a computer program, where the computer program can be stored on a non-transitory computer readable storage medium, where the computer program, when executed by a processor, can perform a sampling control method, apparatus and system provided by the methods above, where the method includes: determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution; determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled; repeatedly executing a circulation step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached; processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled; the cycling step includes: in the process of indicating the shifting unit to drive the moving mirror to reciprocate, counting the shifting unit by taking a zero optical path difference position as a starting point and taking a preset multiple of interference laser wavelength as a unit when forward scanning is performed, until the target spectral resolution is reached, and determining a forward count value; determining a reverse count value according to the forward count value and the target scanning mode; and the shifting unit is instructed to execute reverse scanning according to the reverse count value, and returns to the zero optical path difference position after the reverse scanning is completed.

In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which, when executed by a processor, is implemented to perform the sampling control method provided by the above methods, the method comprising: determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution; determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled; repeatedly executing a circulation step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached; processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled; the cycling step includes: in the process of indicating the shifting unit to drive the moving mirror to reciprocate, counting the shifting unit by taking a zero optical path difference position as a starting point and taking a preset multiple of interference laser wavelength as a unit when forward scanning is performed, until the target spectral resolution is reached, and determining a forward count value; determining a reverse count value according to the forward count value and the target scanning mode; and the shifting unit is instructed to execute reverse scanning according to the reverse count value, and returns to the zero optical path difference position after the reverse scanning is completed.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. The sampling control method is characterized by being realized based on a sampling control device, wherein the sampling control device is respectively connected with a shifting unit and a sampling detection unit, and the shifting unit is connected with a moving mirror;

the sampling control method comprises the following steps:

determining target spectral resolution corresponding to a unit to be sampled from a corresponding relation of preset spectral resolution; the corresponding relation between each preset sampling unit and each preset spectrum resolution is stored in the corresponding relation of the preset spectrum resolution;

determining a target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, wherein the unit attribute is used for marking the substance form of the unit to be sampled; the target scanning mode is used for determining a preset coefficient;

Repeatedly executing a circulation step, and indicating the sampling detection unit to acquire all data corresponding to the unit to be sampled until the preset times are reached;

processing all data according to Fourier transformation, and acquiring target spectrum information of the unit to be sampled;

the cycling step includes:

in the process that the shifting unit drives the moving mirror to reciprocate, forward scanning is carried out on the shifting unit by taking a zero optical path difference position as a starting point so as to acquire data corresponding to the unit to be sampled, counting is carried out by taking a preset multiple of interference laser wavelength as a unit, and forward scanning is stopped and a forward count value is determined after the target spectral resolution is reached;

determining a reverse count value according to the forward count value and the target scanning mode;

the shifting unit is instructed to execute reverse scanning according to the reverse count value so as to acquire data corresponding to the unit to be sampled, and the shifting unit returns to the zero optical path difference position after the reverse scanning is completed;

the unit attribute comprises a gaseous attribute, a liquid attribute and a solid attribute, and the determining the target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled comprises the following steps:

Under the condition that the unit to be sampled is determined to be a gaseous substance, determining a target scanning mode corresponding to the unit attribute to be a gaseous scanning mode; the gaseous scanning mode determines a first preset coefficient;

under the condition that the unit to be sampled is determined to be a liquid substance, determining that a target scanning mode corresponding to the unit attribute is a liquid scanning mode; the liquid scanning mode determines a second preset coefficient;

under the condition that the unit to be sampled is determined to be a solid substance, determining a target scanning mode corresponding to the unit attribute to be a solid scanning mode; the solid state scanning mode determines a third preset coefficient;

in the case that the target scan mode is a gaseous scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a first reverse scanning value according to the forward counting value and a first preset coefficient;

determining the reverse count value according to the first reverse scan value and the forward count value;

when the target scanning mode is a liquid scanning mode, the determining a reverse counting value according to the forward counting value and the target scanning mode includes:

Determining a second reverse scanning value according to the forward counting value and a second preset coefficient;

determining the reverse count value according to the second reverse scan value and the forward count value;

the first preset coefficient is greater than or equal to the second preset coefficient;

in the case that the target scan mode is a solid-state scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a third reverse scanning value according to the forward counting value and a third preset coefficient;

determining the reverse count value according to the third reverse scan value and the forward count value;

the second preset coefficient is greater than or equal to the third preset coefficient.

2. The sampling control method according to claim 1, wherein the sampling control device is connected to a white light device and a white light detector, respectively;

before counting the laser wavelength when performing the forward scan, the method further comprises:

in the process that the shifting unit drives the moving mirror to reciprocate, the white light equipment is instructed to be started, and white light interference information is obtained according to the white light detector;

Processing the white light interference information by adopting a maximum detection algorithm to obtain the zero optical path difference position;

indicating to turn off the white light device.

3. The method according to claim 1, wherein the processing all data according to fourier transform to obtain target spectrum information of the unit to be sampled includes:

processing all data according to a preset mode, and obtaining original information corresponding to each data;

for each piece of original information, processing the original information according to Fourier transformation to obtain target spectrum information;

the preset mode comprises at least one of symmetrical processing, noise elimination processing, apodization processing and phase correction of the unilateral acquired data.

4. The sampling control device is characterized by being respectively connected with a shifting unit and a sampling detection unit, wherein the shifting unit is connected with a moving mirror;

the sampling control device includes:

the first determining unit is used for determining target spectral resolution corresponding to the unit to be sampled from the corresponding relation of the preset spectral resolution;

the second determining unit is used for determining a target scanning mode according to the substance form of the unit to be sampled, wherein the substance form comprises a gas state, a liquid state and a solid state;

The repeating unit is used for repeatedly executing the circulating step until the preset times are reached, and the sampling detection unit is instructed to acquire all data corresponding to the unit to be sampled;

the acquisition unit is used for processing all data according to Fourier transformation and acquiring target spectrum information of the unit to be sampled;

the repeating unit includes:

the first determining module is used for executing forward scanning on the shifting unit by taking a zero optical path difference position as a starting point in the process of driving the moving mirror to reciprocate by the shifting unit so as to acquire data corresponding to the unit to be sampled, counting by taking a preset multiple of interference laser wavelength as a unit, stopping the forward scanning until the target spectral resolution is reached, and determining a forward count value;

the second determining module is used for determining a reverse count value according to the forward count value and the target scanning mode;

the execution module is used for indicating the shifting unit to execute reverse scanning according to the reverse count value so as to acquire data corresponding to the unit to be sampled, and returning to the zero optical path difference position after the reverse scanning is completed;

The unit attribute comprises a gaseous attribute, a liquid attribute and a solid attribute, and the determining the target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled comprises the following steps:

under the condition that the unit to be sampled is determined to be a gaseous substance, determining a target scanning mode corresponding to the unit attribute to be a gaseous scanning mode; the gaseous scanning mode determines a first preset coefficient;

under the condition that the unit to be sampled is determined to be a liquid substance, determining that a target scanning mode corresponding to the unit attribute is a liquid scanning mode; the liquid scanning mode determines a second preset coefficient;

under the condition that the unit to be sampled is determined to be a solid substance, determining a target scanning mode corresponding to the unit attribute to be a solid scanning mode; the solid state scanning mode determines a third preset coefficient;

in the case that the target scan mode is a gaseous scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a first reverse scanning value according to the forward counting value and a first preset coefficient;

determining the reverse count value according to the first reverse scan value and the forward count value;

When the target scanning mode is a liquid scanning mode, the determining a reverse counting value according to the forward counting value and the target scanning mode includes:

determining a second reverse scanning value according to the forward counting value and a second preset coefficient;

determining the reverse count value according to the second reverse scan value and the forward count value;

the first preset coefficient is greater than or equal to the second preset coefficient;

in the case that the target scan mode is a solid-state scan mode, the determining a reverse count value according to the forward count value and the target scan mode includes:

determining a third reverse scanning value according to the forward counting value and a third preset coefficient;

determining the reverse count value according to the third reverse scan value and the forward count value;

the second preset coefficient is greater than or equal to the third preset coefficient.

5. A sampling control system, which is characterized by comprising a light source unit, a semi-transparent semi-reflective unit, a static mirror, a moving mirror, a shifting unit, a unit to be sampled, a sampling detection unit, a laser reflection unit, a laser detection unit and the sampling control device of claim 4;

The semi-transparent and semi-reflective unit is respectively connected with the light source unit, the static mirror, the moving mirror, the unit to be sampled and the laser detection unit;

the to-be-sampled unit is connected with the sampling detection unit, and the laser detection unit is respectively connected with the sampling control device and the laser reflection unit;

the wide-spectrum light source emitted by the light source unit passes through the half-transmission half-reflection unit to form a first light source and a second light source, wherein the first light source is reflected to the half-transmission half-reflection unit through the static mirror and is irradiated to the unit to be sampled after being combined with the second light source to the half-transmission half-reflection unit through the moving mirror, and the first light source is irradiated to the sampling detection unit through the unit to be sampled;

the laser light source emitted by the laser unit passes through the half-transmission half-reflection unit to form a third light source and a fourth light source, wherein the third light source is reflected to the half-transmission half-reflection unit through the static mirror, and is reflected to the half-transmission half-reflection unit through the moving mirror with the fourth light source to be combined, and then passes through the laser reflection unit to irradiate the laser detection unit;

The light source unit and the laser unit are arranged at the first side end of the half-transmission half-reflection unit;

the static mirror is arranged at the second side end of the half-transmission half-reflection unit;

the moving mirror, the shifting unit and the sampling control device are arranged at the third side end of the semi-transparent and semi-reflective unit;

the laser detection unit, the unit to be sampled, the laser reflection unit and the sampling detection unit are arranged at the fourth side end of the semi-transparent and semi-reflective unit;

the straight line formed by the first side end and the third side end is perpendicular to the straight line formed by the second side end and the fourth side end.

6. The sampling control system of claim 5, further comprising a white light device and a white light detector, wherein the sampling control device is coupled to the white light device and the white light detector;

the white light device is arranged at the fourth side end, and the white light detector is arranged at the first side end.