Sampling control method, apparatus and system

Abstract

The present application relates to the field of spectrum acquisition. Provided are a sampling control method, apparatus and system. The sampling control method is implemented by means of the sampling control apparatus. The sampling control apparatus is separately 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: determining a target spectral resolution corresponding to a unit to be sampled; according to a unit attribute of said unit, determining a target scanning mode; repeatedly executing cyclic steps, so as to instruct to acquire all data corresponding to said unit until reaching a preset number of times; and according to the Fourier transform, processing all the data, so as to acquire target spectral information of said unit. The present application determines different scanning modes on the basis of different unit attributes of different units to be sampled, and guides forward scanning and reverse scanning on the basis of spectral resolutions of different units to be sampled and corresponding scanning modes, thus improving the scanning efficiency while ensuring the scanning precision, and satisfying scanning and sampling requirements under current environments.

Description

Sampling control method, device and system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2023112401986, filed on September 25, 2023, entitled “Sampling Control Method, Device and System,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present application relates to the field of spectral acquisition, and in particular to a sampling control method, device and system. Background Art

[0004] In actual use, since different samples to be sampled have different spectral resolutions during scanning and different scanning modes required for different samples to be sampled are also different, the scanning efficiency of the samples to be sampled cannot be improved while ensuring the scanning accuracy. However, while ensuring the scanning efficiency, the scanning accuracy is greatly reduced, which cannot meet the current sampling needs.

[0005] Summary of the Invention

[0006] The present application provides a sampling control method, device and system to solve the technical problem that the existing technology cannot simultaneously consider scanning accuracy and scanning efficiency.

[0007] In a first aspect, the present application provides a sampling control method, wherein the sampling control method is implemented based on a sampling control device, wherein the sampling control device is respectively connected to a shift unit and a sampling detection unit, and the shift unit is connected to a motion mirror;

[0008] The sampling control method comprises:

[0009] Determining a target spectral resolution corresponding to the unit to be sampled from a corresponding relationship of preset spectral resolutions;

[0010] Determining a target scanning mode corresponding to the unit attribute of the unit to be sampled, wherein the unit attribute is used to mark the material form of the unit to be sampled;

[0011] Repeat the loop step to instruct the sampling detection unit to obtain all data corresponding to the unit to be sampled until a preset number of times is reached;

[0012] Process all data according to Fourier transform to obtain target spectrum information of the unit to be sampled;

[0013] The cycle steps include:

[0014] In the process of the shift unit driving the moving mirror to move back and forth, the shift unit is forward scanned with the zero optical path difference position as the starting point to obtain data corresponding to the unit to be sampled, and the data is counted in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, and the forward scanning is stopped and the forward count value is determined;

[0015] determining a reverse count value according to the forward count value and the target scanning mode;

[0016] The shift unit is instructed to perform reverse scanning according to the reverse count value to obtain data corresponding to the unit to be sampled, and to return to the zero optical path difference position after completing the reverse scanning.

[0017] According to the sampling control method of the present application, the unit attributes include gaseous attributes, liquid attributes, and solid attributes. Determining the target scanning mode corresponding to the unit attributes according to the unit attributes of the unit to be sampled includes:

[0018] In the case where it is determined that the unit to be sampled is a gaseous substance, determining that the target scanning mode corresponding to the unit attribute is a gaseous scanning mode;

[0019] In the case where it is determined that the unit to be sampled is a liquid substance, determining that the target scanning mode corresponding to the unit attribute is a liquid scanning mode;

[0020] In the case where it is determined that the unit to be sampled is a solid material, the target scanning mode corresponding to the unit attribute is determined to be a solid scanning mode.

[0021] According to the sampling control method of the present application, when the target scanning mode is the gaseous scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0022] Determining a first reverse scan value according to the forward count value and a first preset coefficient;

[0023] The reverse count value is determined according to the first reverse scan value and the forward count value.

[0024] According to the sampling control method of the present application, when the target scanning mode is a liquid scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0025] Determining a second reverse scan value according to the forward count value and a second preset coefficient;

[0026] determining the reverse count value according to the second reverse scan value and the forward count value;

[0027] The first preset coefficient is greater than or equal to the second preset coefficient.

[0028] According to the sampling control method of the present application, when the target scanning mode is the solid-state scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0029] determining a third reverse scan value according to the forward count value and a third preset coefficient;

[0030] determining the reverse count value according to the third reverse scan value and the forward count value;

[0031] The second preset coefficient is greater than or equal to the third preset coefficient.

[0032] According to the sampling control method of the present application, the sampling control device is connected to the white light device and the white light detector respectively;

[0033] Before counting the laser wavelengths when performing the forward scan, the method further includes:

[0034] In the process of the shift unit driving the moving mirror to move back and forth, instructing to turn on the white light device and obtain white light interference information according to the white light detector;

[0035] Processing the white light interference information using a maximum detection algorithm to obtain the zero optical path difference position;

[0036] Instructs to turn off the white light device.

[0037] According to the sampling control method of the present application, the processing of all data according to Fourier transform to obtain the target spectrum information of the unit to be sampled includes:

[0038] Process all data according to the preset method and obtain the original information corresponding to each data;

[0039] For each piece of original information, processing the original information according to Fourier transform to obtain target spectrum information;

[0040] The preset method includes performing at least one of symmetric processing, noise removal processing, apodization processing and phase correction on the single-side collected data.

[0041] In a second aspect, a sampling control device is provided, wherein the sampling control device is connected to a shift unit and a sampling detection unit, and the shift unit is connected to a motion mirror;

[0042] The sampling control device comprises:

[0043] a first determining unit, configured to determine a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions;

[0044] a second determining unit, configured to determine a target scanning mode according to a material form of the unit to be sampled, wherein the material form includes gas, liquid, and solid;

[0045] a repeating unit, configured to repeatedly execute the looping steps until a preset number of times is reached, and then instruct the sampling and detection unit to acquire all data corresponding to the unit to be sampled;

[0046] An acquisition unit, configured to process all data according to Fourier transform to acquire target spectrum information of the unit to be sampled;

[0047] The repeating unit comprises:

[0048] a first determining module configured to, in a process of instructing the shift unit to drive the moving mirror to reciprocate, count the number of times the wavelength of the interference laser is preset when the shift unit performs forward scanning, with the zero optical path difference position as a starting point, until the target spectral resolution is reached and determine a forward count value;

[0049] a second determining module, configured to determine a reverse counting value according to the forward counting value and the target scanning mode;

[0050] An execution module is configured to execute reverse scanning according to the reverse count value and then return to the zero optical path difference position.

[0051] In a third aspect, a sampling control system is provided, comprising a light source unit, a semi-transmissive and semi-reflective unit, a stationary mirror, a moving mirror, a shift unit, a unit to be sampled, a sampling detection unit, a laser unit, a laser reflection unit, a laser detection unit, and the sampling control device;

[0052] Wherein, the semi-transmissive and semi-reflective unit is respectively connected to the light source unit, the stationary mirror, the moving mirror, the unit to be sampled and the laser detection unit;

[0053] The unit to be sampled is connected to the sampling detection unit, and the laser detection unit is respectively connected to the sampling control device and the laser reflection unit;

[0054] The wide-spectrum light source emitted by the light source unit forms a first light beam and a second light beam after passing through the semi-transmissive and semi-reflective unit. The first light beam is reflected by the stationary mirror to the semi-transmissive and semi-reflective unit, and is combined with the second light beam reflected by the moving mirror to the semi-transmissive and semi-reflective unit to illuminate the unit to be sampled. The first light beam is then transmitted through the unit to be sampled and illuminates the sampling detection unit.

[0055] The laser light source emitted by the laser unit forms a third light beam and a fourth light beam after passing through the semi-transmissive and semi-reflective unit. The third light beam is reflected by the stationary mirror to the semi-transmissive and semi-reflective unit, and is combined with the fourth light beam reflected by the moving mirror to the semi-transmissive and semi-reflective unit, and then passes through the laser reflecting unit to illuminate the laser detection unit.

[0056] The light source unit and the laser unit are arranged at a first side end of the transflective unit;

[0057] The stationary mirror is provided at the second side end of the semi-transparent and semi-reflective unit;

[0058] The moving mirror, the shift unit and the sampling control device are arranged at a third side end of the semi-transmissive and semi-reflective unit;

[0059] 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-transmissive and semi-reflective unit;

[0060] A straight line formed by the first side end and the third side end and a straight line formed by the second side end and the fourth side end are perpendicular to each other.

[0061] According to the sampling control system provided by the present application, the sampling control system further includes a white light device and a white light detector, and the sampling control device is connected to the white light device and the white light detector;

[0062] The white light device is arranged at the fourth side end, and the white light detector is arranged at the first side end.

[0063] The present application provides a sampling control method, device, and system. The method determines a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions, determines a target scanning mode corresponding to the unit attributes of the unit to be sampled, and repeatedly executes the following loop steps: While instructing the shift unit to drive the moving mirror to reciprocate, the method starts from a zero optical path difference position and counts the number of times the wavelength of the interfering laser is preset when the shift unit performs forward scanning. A forward count value is determined until the target spectral resolution is reached, and a reverse count value is determined based on the forward count value and the target scanning mode. The method then instructs the shift unit to perform reverse scanning based on the reverse count value and return to the zero optical path difference position after completing the reverse scanning until a preset number of times is reached, thereby obtaining target spectral information of the unit to be sampled. The method can determine different scanning modes for different unit attributes of different units to be sampled, and implement forward and reverse scanning based on the spectral resolution and corresponding scanning mode of different units to be sampled, thereby improving scanning efficiency while ensuring scanning accuracy and meeting the scanning sampling requirements of the current environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] In order to more clearly illustrate the technical solutions in the present application or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0065] FIG1 is a flow chart of a sampling control method according to an embodiment of the present application;

[0066] FIG2 is a schematic diagram of a flow chart of determining a target scanning mode according to an embodiment of the present application;

[0067] FIG3 is a second flow chart of the sampling control method provided in an embodiment of the present application;

[0068] FIG4 is a schematic structural diagram of a sampling control device provided in an embodiment of the present application;

[0069] FIG5 is a schematic diagram of a structure of a sampling control system according to an embodiment of the present application;

[0070] FIG6 is a second structural diagram of a sampling control system provided in an embodiment of the present application;

[0071] FIG7 is a schematic structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0072] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0073] The Fourier spectrometer is a spectral measurement system developed based on the Fourier transform principle. Its spectral measurement of samples can be used for quantitative or qualitative analysis and is widely used in the analysis and identification fields of various industries. The Fourier spectrometer consists of an interferometer and a computer. The computer is used to analyze the collected signals or images, and the interferometer generates an interfering broad-spectrum light beam for sample detection. The important part of the interferometer is to split the broad-spectrum light into two beams, one of which is irradiated on a stationary reflector and the other on a moving reflector. The two beams of light irradiate the sample to form an interference signal. However, in existing scanning, sample data is usually collected by single-sided scanning or double-sided scanning. However, how to select single-sided scanning or double-sided scanning, and how to control the number of scanning steps of single-sided scanning or double-sided scanning are all determined by manual experience, and it is impossible to perform specific analysis based on the actual unit data of the unit to be sampled, which leads to the inability to improve the scanning efficiency while ensuring the scanning accuracy. In order to solve this technical problem, the present application provides a sampling control method, device and system. Figure 1 is one of the flow charts of the sampling control method provided by the present application. The sampling control method is implemented based on a sampling control device, and the sampling control device is respectively connected to a shift unit and a sampling detection unit, and the shift unit is connected to a moving mirror. The sampling control device is controlled and connected to the shift unit and the sampling detection unit, and the sampling control device controls the shift unit to drive the moving mirror to move.

[0074] The sampling control method comprises:

[0075] Step 101: Determine a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions.

[0076] In step 101, the correspondence between each preset sampling unit and each preset spectral resolution is stored in the correspondence of the preset spectral resolution, that is, for different units to be sampled, the spectral resolution required to be obtained is different. For example, for different types of substances or different forms of substances, the required spectral resolution is different. Usually, for units to be sampled with gas properties, high spectral resolution is required, and in order to obtain high spectral resolution, a single-sided scanning mode is required; for units to be sampled with solid properties, high resolution is not required, and medium resolution or low resolution can be used. In this case, double-sided scanning can be used.

[0077] Optionally, the reason why the present application needs to determine the target spectral resolution corresponding to the unit to be sampled is to determine the scanning distance during forward scanning and reverse scanning based on the target spectral resolution. The bilateral scanning adopts a scanning mode with the same forward and reverse distance scanning centered on the zero point, while the unilateral scanning sampling adopts a scanning mode with different forward and reverse scanning distances centered on the zero point.

[0078] Step 102: Determine a target scanning mode corresponding to the unit attributes of the unit to be sampled, wherein the unit attributes are used to mark the material form of the unit to be sampled.

[0079] In step 102, the unit attribute is used to mark the material form of the unit to be sampled. The material form can be divided into liquid, gaseous and solid. In other embodiments, it can also be divided into liquid, gaseous, solid, semi-solid and semi-liquid, and semi-liquid and semi-gas. Optionally, the unit attribute can also be used to mark the material use of the unit to be sampled, such as metal element content detection, non-metallic material and powder material analysis, or biological tissue analysis. According to the different material uses of the unit to be sampled, a target scanning mode corresponding to the unit attribute is determined. The target scanning mode includes determining a forward scanning value according to a target spectral resolution, determining a reverse scanning value according to different preset coefficients corresponding to different target scanning modes and the forward scanning value, and performing scanning according to the forward scanning value and the reverse scanning value.

[0080] Step 103 : Repeat the loop steps to instruct the sampling detection unit to obtain all data corresponding to the unit to be sampled until a preset number of times is reached.

[0081] In step 103, the loop step includes, in the process of the shift unit driving the moving mirror to move back and forth, taking the zero optical path difference position as the starting point, performing a forward scan on the shift unit to obtain data corresponding to the unit to be sampled, counting in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, stopping the forward scan and determining the forward count value; determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform a reverse scan based on the reverse count value to obtain data corresponding to the unit to be sampled, and returning to the zero optical path difference position after completing the reverse scan.

[0082] In the process of the shift unit driving the moving mirror to move back and forth, the present application first obtains the zero optical path difference position according to the detection algorithm of the hardware or preset software, takes the zero optical path difference position as the starting point, starts the forward scan, and counts the preset multiples of the interference laser wavelength when performing the forward scan on the shift unit, that is, starts counting from 0, and increases by 1 each time the preset multiple of the interference laser wavelength is scanned until the forward count value is determined after the target spectral resolution is reached.

[0083] Optionally, the reverse count value is determined based on the forward count value and the target scanning mode, and the target scanning mode determines a preset coefficient. For example, if the preset coefficient is 7, then when the forward count value is determined to be 1000, the reverse count value is determined to be 7000 based on the forward count value and the target scanning mode. The scanning range of the target scanning mode is 1000 to -6000.

[0084] Optionally, the shift unit is instructed to perform a reverse scan based on the reverse count value and return to the zero optical path difference position after completing the reverse scan. The present application performs 7000 steps when performing the reverse scan. However, considering the zero optical path difference position as the starting point, after performing the 7000 steps of reverse scan, the maximum distance during the reverse scan is actually 6000 steps away from the zero optical path difference position. Therefore, the present application also needs to return from the maximum distance position to the zero optical path difference position after completing the reverse scan to perform the next unilateral scan, and repeat the above unilateral scan a preset number of times to instruct the sampling detection unit to acquire all data corresponding to the unit to be sampled.

[0085] Step 104: Process all data according to Fourier transform to obtain target spectrum information of the unit to be sampled.

[0086] Optionally, processing all data according to Fourier transform to obtain target spectrum information of the unit to be sampled includes:

[0087] Process all data according to the preset method and obtain the original information corresponding to each data;

[0088] For each piece of original information, processing the original information according to Fourier transform to obtain target spectrum information;

[0089] The preset method includes performing at least one of symmetric processing, noise removal processing, apodization processing and phase correction on the single-side collected data.

[0090] Optionally, the present application can select at least one of noise removal, apodization and phase correction to process all data according to the actual situation of the collected data, obtain the original information corresponding to each data, and then after preprocessing the data, process the original data according to Fourier transform to obtain target spectral information. The present application preprocesses all data to only filter out the required data for subsequent Fourier transform processing, thereby improving processing efficiency. The present application also improves the accuracy of the target spectral information by preprocessing the data.

[0091] The present application provides a sampling control method, which determines a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions, determines a target scanning mode corresponding to the unit attributes of the unit to be sampled, and repeatedly performs the following loop steps: in the process of instructing the shift unit to drive the moving mirror to move back and forth, starting from the zero optical path difference position, counting the number of times the shift unit performs forward scanning in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, determining a forward count value, and determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform reverse scanning based on the reverse count value, and returning to the zero optical path difference position after completing the reverse scanning until a preset number of times is reached, thereby obtaining target spectral information of the unit to be sampled. The present application can determine different scanning modes for different unit attributes of different units to be sampled, and implement forward scanning and reverse scanning based on the spectral resolution of different units to be sampled and the corresponding scanning mode, thereby improving scanning efficiency while ensuring scanning accuracy and meeting the scanning sampling requirements in the current environment.

[0092] FIG2 is a flow chart of determining a target scanning mode provided by the present application. The cell attributes include gaseous attributes, liquid attributes, and solid attributes. Determining the target scanning mode corresponding to the cell attributes based on the cell attributes of the cell to be sampled includes:

[0093] Step 201: When it is determined that the unit to be sampled is a gaseous substance, determine that the target scanning mode corresponding to the unit attribute is a gaseous scanning mode.

[0094] In step 201, the present application may input the image data of the unit to be sampled into a preset material form recognition model to obtain the recognition result output by the preset material form recognition model. The preset material form recognition model is determined by training based on the sample image data and the sample recognition result 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, and the accuracy of the recognition result may be determined based on the recognition weight. Alternatively, the text description features of the unit to be sampled may be input into a preset semantic recognition model to obtain the recognition result output by the preset semantic recognition model. Specifically, the preset semantic recognition model is determined by training based on the sample text description features and the sample recognition result corresponding to the sample text description features.

[0095] Step 202: When it is determined that the unit to be sampled is a liquid substance, determine that the target scanning mode corresponding to the unit attribute is a liquid scanning mode.

[0096] In step 202, since there are currently two scanning methods, unilateral and bilateral scanning, unilateral scanning is suitable for high-resolution acquisition, while bilateral scanning is suitable for low-resolution acquisition. In actual applications, some recognition results require high-resolution acquisition, while some recognition results do not. This application adopts different target scanning modes according to the different material forms of the units to be sampled. When high resolution is not required, bilateral scanning is adopted to save scanning time and improve scanning efficiency. When high resolution is required, unilateral scanning is adopted to ensure higher spectral resolution. Corresponding to this application, when the recognition result is a gaseous substance, the target scanning mode corresponding to the unit attribute is determined to be a gaseous scanning mode, and the gaseous scanning mode is unilateral scanning. When the recognition result is a liquid substance, the target scanning mode corresponding to the unit attribute is determined to be a liquid scanning mode. When the recognition result is a solid substance, the target scanning mode corresponding to the unit attribute is determined to be a solid scanning mode. Both the liquid scanning mode and the solid scanning mode are bilateral scanning modes.

[0097] Step 203: When it is determined that the unit to be sampled is a solid material, determine that the target scanning mode corresponding to the unit attribute is a solid scanning mode.

[0098] In step 203, although the liquid scanning mode and the solid scanning mode described in this application are both bilateral scanning, since the preset coefficients corresponding to the liquid scanning mode and the solid scanning mode are different, after determining the forward counting value, the reverse counting values ​​corresponding to the liquid scanning mode and the solid scanning mode are also different.

[0099] Optionally, because the resolution required for solids, liquids, and gases is not absolute, the present application can also determine that the target scanning mode corresponding to the liquid property is a high-resolution scanning mode when the recognition result is a gaseous substance; when the recognition result is a liquid substance, the target scanning mode is a medium-resolution mode; when the recognition result is a solid substance, the target scanning mode is a low-resolution scanning mode.

[0100] The present application can also regard the three different scanning modes as three different resolution modes, namely, high-resolution mode, medium-resolution mode and low-resolution mode. For example, the high-resolution mode adopts a single-sided scanning mode with a scanning range of 1000 to -6000; the medium-resolution mode adopts a double-sided scanning mode, for example, a scanning range of 1000 to -1000; the low-resolution mode adopts a double-sided scanning mode, for example, a scanning range of 500 to -500.

[0101] Optionally, when the target scanning mode is a gaseous scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0102] Determining a first reverse scan value according to the forward count value and a first preset coefficient;

[0103] The reverse count value is determined according to the first reverse scan value and the forward count value.

[0104] Optionally, the preset coefficient is 6. If the forward count value is 500, the first reverse scan value is determined to be 3000 based on the forward count value and the first preset coefficient, and the reverse count value is determined to be 3500 based on the sum of the first reverse scan value and the forward count value. At this time, the scanning range of the gaseous scanning mode is -3000 to 500.

[0105] Optionally, when the target scanning mode is a liquid scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0106] Determining a second reverse scan value according to the forward count value and a second preset coefficient;

[0107] determining the reverse count value according to the second reverse scan value and the forward count value;

[0108] The first preset coefficient is greater than or equal to the second preset coefficient.

[0109] Optionally, the first preset coefficient is greater than or equal to the second preset coefficient, and the second preset coefficient can be 1.5. If the forward count value is 1000, the second reverse scan value is determined to be 1500 based on the forward count value and the second preset coefficient, and the reverse count value is determined to be 2500 based on the second reverse scan value and the forward count value. At this time, the scanning range of the liquid scanning mode is -1500 to 1000.

[0110] Optionally, the second preset coefficient can also be 1. If the forward count value is 1000, the second reverse scan value is determined to be 1000 based on the forward count value and the second preset coefficient, and the reverse count value is determined to be 2000 based on the second reverse scan value and the forward count value. At this time, the scanning range of the liquid scanning mode is -1000 to 1000.

[0111] Optionally, when the target scanning mode is a solid-state scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes:

[0112] determining a third reverse scan value according to the forward count value and a third preset coefficient;

[0113] determining the reverse count value according to the third reverse scan value and the forward count value;

[0114] The second preset coefficient is greater than or equal to the third preset coefficient.

[0115] Optionally, the second preset coefficient is greater than or equal to the third preset coefficient, and the third preset coefficient can be 1. If the forward count value is 1000, the third reverse scan value is determined to be 1000 based on the forward count value and the third preset coefficient, and the reverse count value is determined to be 2000 based on the third reverse scan value and the forward count value. At this time, the scanning range of the solid-state scanning mode is -1000 to 1000.

[0116] FIG3 is a second flow chart of the sampling control method provided by the present application, wherein the sampling control device is connected to the white light device and the white light detector respectively;

[0117] Before counting the laser wavelengths when performing the forward scan, the method further includes:

[0118] Step 301: When the shift unit drives the moving mirror to move back and forth, instruct to turn on the white light device and obtain white light interference information according to the white light detector.

[0119] In step 301, the white light device, the laser unit, and the light source unit in the present application are used to emit light sources, and share an interferometer in the sampling control system provided in the present application. Under the drive of the sampling control device, the shift unit drives the moving mirror to move back and forth, and in the process of the shift unit driving the moving mirror to move back and forth, the sampling control device instructs to turn on the white light device to obtain white light interference information according to the white light detector.

[0120] Step 302: Process the white light interference information using a maximum detection algorithm to obtain the zero optical path difference position.

[0121] In step 302, the present application locates the zero optical path difference position by detecting the maximum value of the interference fringes of the white light, and after obtaining the zero optical path difference position, the tasks of the white light device and the white light detector are completed.

[0122] Step 303: instruct to turn off the white light device.

[0123] In step 303, after determining that the tasks of the white light device and the white light detector are completed, the sampling control device instructs to turn off the white light device to stop emitting white light. The white light source in this application can be a halogen lamp, and can also be replaced by other wide-spectrum light sources, or can be a beam of multiple light sources. The method for determining the position of zero optical path difference in this application can also be completed by using an algorithm to process the detector value. At this time, the white light path part can be replaced by a preset software algorithm.

[0124] Figure 4 is a structural schematic diagram of the sampling control device provided in the present application, which provides a sampling control device, wherein the sampling control device is respectively connected to a shift unit and a sampling detection unit, and the shift unit is connected to a moving mirror; the sampling control device 4 includes a first determination unit 41, and the first determination unit 41 is used to determine the target spectral resolution corresponding to the unit to be sampled from the corresponding relationship of the preset spectral resolution. The working principle of the first determination unit 41 can refer to the aforementioned step 101 and will not be repeated here.

[0125] The sampling control device 4 further includes a second determination unit 42, which is used to determine a target scanning mode according to the material form of the unit to be sampled, wherein the material form includes gas, liquid and solid. The working principle of the second determination unit 42 can be referred to the aforementioned step 102 and will not be repeated here.

[0126] The sampling control device 4 further includes a repeating unit 43, which is used to repeatedly execute the loop steps until a preset number of times is reached, and then instruct the sampling detection unit to obtain all data corresponding to the unit to be sampled. The working principle of the repeating unit 43 can be referred to the aforementioned step 103 and will not be described in detail here.

[0127] The sampling control device 4 further includes an acquisition unit 44, which is used to process all data according to Fourier transform to obtain target spectrum information of the unit to be sampled. The working principle of the acquisition unit 44 can be referred to the aforementioned step 104 and will not be described in detail here.

[0128] The repeating unit 43 comprises:

[0129] a first determining module 431 configured to, in the process of instructing the shift unit to drive the moving mirror to reciprocate, count the number of times the wavelength of the interference laser is preset when the shift unit performs forward scanning, starting from a position of zero optical path difference, until a target spectral resolution is reached and determine a forward count value;

[0130] a second determining module 432, configured to determine a reverse counting value according to the forward counting value and the target scanning mode;

[0131] The execution module 433 is configured to execute reverse scanning according to the reverse count value and return to the zero optical path difference position.

[0132] The present application provides a sampling control device that determines a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions, determines a target scanning mode corresponding to the unit attributes of the unit to be sampled, and repeatedly performs the following loop steps: in the process of instructing the shift unit to drive the moving mirror to move back and forth, starting from the zero optical path difference position, counting the number of times the shift unit performs forward scanning in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, determining a forward count value, and determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform reverse scanning based on the reverse count value, and returning to the zero optical path difference position after completing the reverse scanning until a preset number of times is reached, thereby obtaining target spectral information of the unit to be sampled. The present application can determine different scanning modes for different unit attributes of different units to be sampled, and implement forward scanning and reverse scanning based on the spectral resolution of different units to be sampled and the corresponding scanning mode, thereby improving scanning efficiency while ensuring scanning accuracy and meeting the scanning sampling requirements in the current environment.

[0133] Figure 5 is one of the structural schematic diagrams of the sampling control system provided in the present application, which includes a light source unit 51, a semi-transparent and semi-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.

[0134] Optionally, the light source unit 51 is used to emit a broad-spectrum light source, and the transflective unit 52 can split the light entering the transflective unit 52 into two beams based on its translucent and semi-reflective properties. The stationary mirror 53 is fixedly disposed on one side of the transflective unit 52 to achieve light reflection. The moving mirror 54 is fixed relative to the shift unit 55 and can reciprocate under the action of the servo motor of the shift unit 55. The stationary mirror 53 and the moving mirror 54 are composed of a plane mirror or a corner-angle reflector, or other devices that can reflect light.

[0135] The unit to be sampled 56 is a detection object for spectral analysis, the sampling detection unit 57 is used to receive the interference light passing through the unit to be sampled 56, the laser unit 58 is used to emit laser, the laser reflection unit 59 is used to reflect the laser, and the laser detection unit 60 is used to receive the combined laser from the semi-transparent and semi-reflective unit 52. The sampling control device 4 is used to servo-control the shift unit 55 according to the two feedback signals of the interference signal and the motor speed encoding signal, thereby generating a smooth reciprocating movement.

[0136] The transflective unit 52 is connected to the light source unit 51, the stationary 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.

[0137] Optionally, the voice coil motor of the shift unit 55 is used to drive the moving mirror 54 to form interference light, wherein the voice coil motor can be a piezoelectric ceramic displacement stage, a servo motor, a stepper motor or other devices with similar functions. The voice coil motor adopts closed-loop control, and the feedback signal is provided by the grating encoder of the voice coil motor or the interference signal of the laser detection unit 60.

[0138] Optionally, the laser detection unit 60 may be a one-dimensional detector or a two-dimensional detector. When the laser detection unit 60 is a two-dimensional detector, there is an optical path difference between pixels outside the optical axis and pixels above the optical axis, and the optical path difference can be calculated and corrected based on the trigonometric relationship.

[0139] Optionally, the broad spectrum light emitted by the light source unit 51 forms a first light beam and a second light beam after passing through the semi-transparent and semi-reflective unit 52. The first light beam is reflected by the stationary mirror 53 to the semi-transparent and semi-reflective unit 52, and is combined with the second light beam to be reflected by the moving mirror 54 to the semi-transparent and semi-reflective unit 52, and then illuminates the unit to be sampled 56. The first light beam is then transmitted through the unit to be sampled 56 and illuminates the sampling detection unit 57. The broad spectrum light emitted by the light source unit 51 enters the semi-transparent and semi-reflective unit 52 and is divided into two beams, which are respectively illuminated on the stationary mirror 53 and the moving mirror 54. After reflection, the first light beam is combined into one beam by the semi-transparent and semi-reflective unit 52 and illuminates the unit to be sampled 56. After passing through the unit to be sampled 56, the first light beam is detected by the sampling detection unit 57 and converted into an electrical signal, which is then processed to obtain spectral information.

[0140] Optionally, the laser light source emitted by the laser unit 58 forms a third light beam and a fourth light beam after passing through the semi-transparent and semi-reflective unit 52. The third light beam is reflected by the stationary mirror 53 to the semi-transparent and semi-reflective unit 52, and is combined with the fourth light beam reflected by the moving mirror 54 to the semi-transparent and semi-reflective unit 52, and then passes through the laser reflection unit 59 to irradiate the laser detection unit 60. The laser light source emitted by the laser unit 58 enters the laser detection unit 60 and is converted into an electrical signal. The laser detection unit 60 converts the detected laser interference signal into a TTL signal or an orthogonal sine and cosine signal, and connects it to the sampling control device 4 together with the coding signal in the shift unit 55. The laser emitted by the laser unit 58 has good wavelength and intensity stability, and is used to locate the position of the moving mirror 54.

[0141] Optionally, the sampling control device 4 is configured to drive the shift unit 55 to cause the moving mirror 54 to reciprocate, and obtain an interference signal during the reciprocating movement according to the laser detection unit 60. The shift unit 55 drives the moving mirror 54 to reciprocate and form signal interference between the broadband light and the laser. Since the interference distance of the laser is very long, the signal interference forms a cosine signal, which can be converted into a square wave signal after shaping and connected to the sampling control device 4.

[0142] The light source unit 51 and the laser unit 58 are disposed at a first side end of the transflective unit 52;

[0143] The stationary mirror 53 is provided at the second side end of the semi-transparent and semi-reflective unit 52;

[0144] The moving mirror 54, the shifting unit 55 and the sampling control device 4 are arranged at the third side end of the transflective unit 52;

[0145] The laser detection unit 60, the unit to be sampled 56, the laser reflection unit 59 and the sampling detection unit 57 are arranged at the fourth side end of the semi-transmissive and semi-reflective unit 52;

[0146] A straight line formed by the first side end and the third side end and a straight line formed by the second side end and the fourth side end are perpendicular to each other.

[0147] Optionally, the present application does not impose any limitation on the four side ends of the semi-transparent and semi-reflective unit 52, and it is only necessary that the straight line formed by the first side end and the third side end and the straight line formed by the second side end and the fourth side end are perpendicular to each other. After the above components are arranged in the above manner, the wide-spectrum light source emitted by the light source unit 51 can be formed into a first light beam and a second light beam after passing through the semi-transparent and semi-reflective unit 52. The first light beam is reflected to the semi-transparent and semi-reflective unit 52 through the stationary mirror 53, and is combined with the second light beam reflected to the semi-transparent and semi-reflective unit 52 through the moving mirror 54, and then irradiates the unit to be sampled 56, and then irradiates the sampling detection unit 57 through the unit to be sampled 56; the laser beam emitted by the laser unit 58 can also be formed into a third light beam source and a fourth light beam after passing through the semi-transparent and semi-reflective unit 52. The third light beam is reflected to the semi-transparent and semi-reflective unit 52 through the stationary mirror 53, and is combined with the fourth light beam reflected to the semi-transparent and semi-reflective unit 52 through the moving mirror 54, and then passes through the laser reflection unit 59 to irradiate the laser detection unit 60.

[0148] FIG6 is a second structural diagram of the sampling control system provided in the present application. 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;

[0149] 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.

[0150] The present application provides a sampling control system that determines a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions, determines a target scanning mode corresponding to the unit attributes of the unit to be sampled based on the unit attributes of the unit to be sampled, and repeatedly performs the following loop steps: in the process of instructing the shift unit to drive the moving mirror to move back and forth, starting from the zero optical path difference position, counting the number of times the shift unit performs forward scanning in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, determining a forward count value, and determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform reverse scanning based on the reverse count value, and returning to the zero optical path difference position after completing the reverse scanning until a preset number of times is reached, thereby obtaining target spectral information of the unit to be sampled. The present application can determine different scanning modes for different unit attributes of different units to be sampled, and implement forward scanning and reverse scanning based on the spectral resolution of different units to be sampled and the corresponding scanning mode, thereby improving scanning efficiency while ensuring scanning accuracy and meeting the scanning sampling requirements in the current environment.

[0151] Figure 7 is a schematic diagram of the structure of an electronic device provided by this application. As shown in Figure 7, the electronic device may include: a processor 710, a communications interface 720, a memory 730, and a communication bus 740, wherein the processor 710, the communications interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 can call logic instructions in the memory 730 to execute a sampling control method, the method comprising: determining a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions; determining a target scanning mode corresponding to the unit attribute of the unit to be sampled based on the unit attribute of the unit to be sampled, wherein the unit attribute is used to mark the material form of the unit to be sampled; repeatedly executing a loop step to instruct the sampling detection unit to acquire all data corresponding to the unit to be sampled until a preset number of times is reached; processing all data according to Fourier transform to acquire target spectral information of the unit to be sampled; the loop step comprising: instructing the shift unit to drive the moving mirror to move back and forth, counting the number of times the shift unit performs forward scanning in units of preset multiples of the interference laser wavelength with a zero optical path difference position as a starting point until the target spectral resolution is reached, determining a forward count value; determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform reverse scanning based on the reverse count value, and returning to the zero optical path difference position after the reverse scanning is completed.

[0152] In addition, the logic instructions in the above-mentioned memory 730 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0153] On the other hand, the present application also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the sampling control method, device and system provided by the above methods. The method includes: determining the target spectral resolution corresponding to the unit to be sampled from the corresponding relationship of the preset spectral resolution; determining the target scanning mode corresponding to the unit attribute according to the unit attribute of the unit to be sampled, and the unit attribute is used to mark the material form of the unit to be sampled; repeatedly executing the loop steps to instruct the sampling detection unit to obtain the material form of the unit to be sampled. all data corresponding to the sampling unit until a preset number of times is reached; all data are processed according to Fourier transform to obtain the target spectrum information of the unit to be sampled; the loop step includes: in the process of instructing the shift unit to drive the moving mirror to move back and forth, taking the zero optical path difference position as the starting point, counting the preset multiples of the interference laser wavelength when performing forward scanning on the shift unit until the target spectral resolution is reached, determining the forward count value; determining the reverse count value according to the forward count value and the target scanning mode; instructing the shift unit to perform reverse scanning according to the reverse count value, and returning to the zero optical path difference position after completing the reverse scan.

[0154] In yet another aspect, the present application further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When executed by a processor, the computer program is implemented to perform the sampling control method provided by each of the above methods, the method comprising: determining a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions; determining a target scanning mode corresponding to the unit attribute of the unit to be sampled based on the unit attribute of the unit to be sampled, wherein the unit attribute is used to mark the material form of the unit to be sampled; repeatedly executing a loop step to instruct the sampling detection unit to acquire all data corresponding to the unit to be sampled until a preset number of times is reached; processing all data according to a Fourier transform to acquire target spectral information of the unit to be sampled; the loop step comprising: while instructing the shift unit to drive the moving mirror to move back and forth, counting the number of times the shift unit performs a forward scan with a zero optical path difference position as a starting point in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, determining a forward count value; determining a reverse count value based on the forward count value and the target scanning mode; instructing the shift unit to perform a reverse scan based on the reverse count value, and returning to the zero optical path difference position after completing the reverse scan.

[0155] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0156] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sampling control method, wherein the sampling control method is implemented based on a sampling control device, wherein the sampling control device is respectively connected to a shift unit and a sampling detection unit, and the shift unit is connected to a motion mirror; The sampling control method comprises: Determining a target spectral resolution corresponding to the unit to be sampled from a corresponding relationship of preset spectral resolutions; According to the unit attribute of the unit to be sampled, determining a target scanning mode corresponding to the unit attribute, wherein the unit attribute is used to mark the material form of the unit to be sampled; Repeat the loop step to instruct the sampling detection unit to obtain all data corresponding to the unit to be sampled until a preset number of times is reached; Process all data according to Fourier transform to obtain target spectrum information of the unit to be sampled; The cycle steps include: In the process of the shift unit driving the moving mirror to move back and forth, the shift unit is forward scanned with the zero optical path difference position as the starting point to obtain the data corresponding to the unit to be sampled, and the data is counted in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, and the forward scanning is stopped and the forward count value is determined; Determine a reverse count value according to the forward count value and the target scanning mode; The shift unit is instructed to perform reverse scanning according to the reverse count value to obtain data corresponding to the unit to be sampled, and to return to the zero optical path difference position after completing the reverse scanning.

2. The sampling control method according to claim 1, wherein: The unit attributes include gaseous attributes, liquid attributes, and solid attributes. The determining of the target scanning mode corresponding to the unit attributes according to the unit attributes of the unit to be sampled includes: In the case where it is determined that the unit to be sampled is a gaseous substance, determining that the target scanning mode corresponding to the unit attribute is a gaseous scanning mode; In the case where it is determined that the unit to be sampled is a liquid substance, determining that the target scanning mode corresponding to the unit attribute is a liquid scanning mode; In the case where it is determined that the unit to be sampled is a solid material, the target scanning mode corresponding to the unit attribute is determined to be a solid scanning mode.

3. The sampling control method according to claim 2, wherein: In a case where the target scanning mode is a gaseous scanning mode, determining a reverse counting value according to the forward counting value and the target scanning mode includes: Determine a first reverse scan value according to the forward count value and a first preset coefficient; The reverse count value is determined according to the first reverse scan value and the forward count value.

4. The sampling control method according to claim 3, wherein: In the case where the target scanning mode is a liquid scanning mode, determining the reverse counting value according to the forward counting value and the target scanning mode includes: Determine a second reverse scan value according to the forward count value and a second preset coefficient; Determine 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.

5. The sampling control method according to claim 4, wherein: In a case where the target scanning mode is a solid scanning mode, determining a reverse counting value according to the forward counting value and the target scanning mode includes: Determine a third reverse scan value according to the forward count value and a third preset coefficient; Determine 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.

6. The sampling control method according to claim 1, wherein: The sampling control device is respectively connected to the white light device and the white light detector; Before counting the laser wavelengths when performing forward scanning, the method further includes: In the process of the shift unit driving the moving mirror to move back and forth, instructing to turn on the white light device and obtain white light interference information according to the white light detector; Processing the white light interference information using a maximum detection algorithm to obtain the zero optical path difference position; Instructs to turn off the white light device.

7. The sampling control method according to claim 1, wherein: The step of processing all data according to Fourier transform to obtain target spectrum information of the unit to be sampled includes: Process all data according to the preset method and obtain the original information corresponding to each data; For each piece of original information, the original information is processed according to Fourier transform to obtain target spectrum information; The preset method includes at least one of symmetric processing, noise removal processing, toe-cutting processing and phase correction for the single-side collected data.

8. A sampling control device, the sampling control device is connected to a shift unit and a sampling detection unit respectively, and the shift unit is connected to a motion mirror; The sampling control device comprises: A first determining unit, configured to determine a target spectral resolution corresponding to a unit to be sampled from a correspondence relationship of preset spectral resolutions; A second determination unit, the second determination unit is used to determine a target scanning mode according to the material form of the unit to be sampled, the material form including gas, liquid and solid; A repeating unit, the repeating unit is used to repeatedly execute the loop step until a preset number of times is reached, and then instruct the sampling and detection unit to obtain all data corresponding to the unit to be sampled; An acquisition unit, the acquisition unit is used to process all data according to Fourier transform to acquire target spectrum information of the unit to be sampled; The repeating unit comprises: A first determining module, wherein the first determining module is used to perform a forward scan on the shift unit to obtain data corresponding to the unit to be sampled, with the zero optical path difference position as the starting point, during the process in which the shift unit drives the moving mirror to reciprocate, and count in units of preset multiples of the interference laser wavelength until the target spectral resolution is reached, stop the forward scan, and determine the forward count value; a second determining module, the second determining module being configured to determine a reverse counting value according to the forward counting value and the target scanning mode; An execution module is used to instruct the shift unit to perform a reverse scan according to the reverse count value to obtain data corresponding to the unit to be sampled, and return to the zero optical path difference position after completing the reverse scan.

9. A sampling control system, comprising a light source unit, a semi-transmissive and semi-reflective unit, a stationary mirror, a moving mirror, a shift unit, a unit to be sampled, a sampling detection unit, a laser unit, a laser reflection unit, a laser detection unit, and the sampling control device according to claim 8; in, The semi-transmissive and semi-reflective unit is respectively connected to the light source unit, the stationary mirror, the moving mirror, the unit to be sampled and the laser detection unit; The unit to be sampled is connected to the sampling detection unit, and the laser detection unit is respectively connected to the sampling control device and the laser reflection unit; The wide-spectrum light source emitted by the light source unit forms a first light beam and a second light beam after passing through the semi-transmissive and semi-reflective unit. The first light beam is reflected to the semi-transmissive and semi-reflective unit by the stationary mirror, and is combined with the second light beam reflected to the semi-transmissive and semi-reflective unit by the moving mirror, and then irradiates the unit to be sampled, and irradiates the sampling detection unit through the unit to be sampled; The laser light source emitted by the laser unit forms a third light beam and a fourth light beam after passing through the semi-transmissive and semi-reflective unit. The third light beam is reflected to the semi-transmissive and semi-reflective unit by the stationary mirror, and is combined with the fourth light beam reflected to the semi-transmissive and semi-reflective unit by the moving mirror, 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 a first side end of the semi-transmissive and semi-reflective unit; The stationary mirror is arranged at the second side end of the semi-transparent and semi-reflective unit; The motion mirror, the shift unit and the sampling control device are arranged at a third side end of the semi-transmissive 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-transmissive and semi-reflective unit; A straight line formed by the first side end and the third side end and a straight line formed by the second side end and the fourth side end are perpendicular to each other.

10. The sampling control system according to claim 9, wherein: The sampling control system further comprises a white light device and a white light detector, and the sampling control device is connected 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.

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