阅读说明：本技术 一种提高测试效率及精度的植物叶片多成分检测装置 (Plant leaf multicomponent detection device capable of improving test efficiency and precision ) 是由 俞博文 孙俊 张倩 于 2021-09-24 设计创作，主要内容包括：本发明提供一种提高测试效率及精度的植物叶片多成分检测装置,包括手柄、测试机构和切换机构；手柄的底部滑动连接有扳机,扳机侧面固接有弹簧的一端,手柄侧面固接有弹簧的另一端,测试装置设置在手柄的顶部,切换装置设置在扳机的顶部；测试机构包括底盒,底盒的顶部固接有嵌入式系统支架,底盒内腔设置有电路板,底盒内腔顶部设置有锂电池,锂电池与电路板电性连接,电路板上设置有光电感应组件,电路板的一端设置有光纤聚焦镜耦合器,电路板的另一端电性连接有光谱组件,光纤聚焦镜耦合器与光谱组件电性连接,光谱组件与切换机构位于同一平面上,电路板的顶部电性连接PC端。(The invention provides a plant leaf multicomponent detection device for improving test efficiency and precision, which comprises a handle, a test mechanism and a switching mechanism, wherein the handle is provided with a first end and a second end; the bottom of the handle is connected with a trigger in a sliding manner, one end of a spring is fixedly connected to the side surface of the trigger, the other end of the spring is fixedly connected to the side surface of the handle, the testing device is arranged at the top of the handle, and the switching device is arranged at the top of the trigger; the testing mechanism comprises a bottom box, an embedded system support is fixedly connected to the top of the bottom box, a circuit board is arranged in an inner cavity of the bottom box, a lithium battery is arranged at the top of the inner cavity of the bottom box and electrically connected with the circuit board, a photoelectric sensing assembly is arranged on the circuit board, an optical fiber focusing mirror coupler is arranged at one end of the circuit board, a spectrum assembly is electrically connected to the other end of the circuit board, the optical fiber focusing mirror coupler is electrically connected with the spectrum assembly, the spectrum assembly and the switching mechanism are located on the same plane, and the top of the circuit board is electrically connected with a PC end.)

1. A plant leaf multi-component detection device for improving the test efficiency and precision is characterized by comprising a handle (1), a test mechanism and a switching mechanism; the testing device comprises a handle (1), a trigger (2), a spring (3), a switching device and a spring, wherein the handle (1) is arranged in a pistol-shaped structure, the bottom of the handle (1) is connected with the trigger (2) in a sliding mode, one end of the spring (3) is fixedly connected to the side surface of the trigger (2), the other end of the spring (3) is fixedly connected to the side surface of the handle (1), the testing device is arranged at the top of the handle (1), and the switching device is arranged at the top of the trigger (2);

the testing mechanism comprises a bottom box (4), an embedded system support (5) is fixedly connected to the top of the bottom box (4), a circuit board (6) is arranged in an inner cavity of the bottom box (4), a lithium battery (7) is arranged at the top of the inner cavity of the bottom box (4), the lithium battery (7) is electrically connected with the circuit board (6), a photoelectric sensing assembly is arranged on the circuit board (6), an optical fiber focusing mirror coupler (8) is arranged at one end of the circuit board (6), a spectrum assembly is electrically connected to the other end of the circuit board (6), the optical fiber focusing mirror coupler (8) is electrically connected with the spectrum assembly, the spectrum assembly is located on the same plane with a switching mechanism, and a PC end is electrically connected to the top of the circuit board (6).

2. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the switching mechanism includes shading pipe (9), the bottom surface rigid coupling of shading pipe (9) has supporting seat (10), the bottom surface of supporting seat (10) with the top surface rigid coupling of trigger (2), one side of shading pipe (9) is provided with commentaries on classics board (11), the top of commentaries on classics board (11) is inlayed and is equipped with standard reflection blank (12), the bottom of commentaries on classics board (11) is inlayed and is equipped with standard absorption blackboard (13), commentaries on classics board (11) side middle part rigid coupling has the one end of damping axle (14), the other end of damping axle (14) with the mouth of pipe department outer wall top of shading pipe (9) rotates and is connected.

3. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the spectrum assembly comprises a micro diffuse reflection probe shell (15), the bottom surface of the micro diffuse reflection probe shell (15) is fixedly connected with the top surface of the handle (1), a xenon lamp (16) is fixedly connected with the top surface of the inner cavity of the micro diffuse reflection probe shell (15), a USB interface (17) is arranged on the bottom surface of the bottom box (4), the USB interface (17) penetrates through the bottom surface of the bottom box (4) and the circuit board (6) and is electrically connected with the xenon lamp (16) and the USB interface (17), the optical fiber focusing mirror coupler (8) is electrically connected with one end of a multimode optical fiber (18), and the other end of the multimode optical fiber (18) is communicated with the inner cavity of the micro diffuse reflection probe shell (15).

4. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the top of the circuit board (6) is electrically connected with one end of a USB light beam (19), and the other end of the USB light beam (19) penetrates through the top surface of the bottom box (4) and extends into the embedded system support (5).

5. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: photoelectric sensing subassembly includes photoelectric sensing ware (20), photoelectric sensing ware (20) outer wall both sides rigid coupling has plastics location hoop (21), plastics location hoop (21) with circuit board (6) top surface rigid coupling, circuit board (6) top surface is provided with paster connector (22), the both ends of paster connector (22) respectively with circuit board (6) with photoelectric sensing ware (20) electric connection, optic fibre focus mirror coupler (8) with photoelectric sensing ware (20) electric connection.

6. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the central line of the shell (15) of the micro diffuse reflection probe is superposed with the axis of the light shading tube (9).

7. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the areas of the standard reflection white board (12) and the standard absorption blackboard (13) are both larger than the pipe diameter of the shading pipe (9).

8. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the bottom surface of the bottom box (4) is fixedly connected with a support frame (23), and the bottom surface of the support frame (23) is fixedly connected with the top surface of the handle (1).

9. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the top surface rigid coupling of trigger (2) has T type slider, the bottom surface of handle (1) seted up with the T type groove of T type slider looks adaptation, T type slider with T type groove sliding connection.

10. The device for detecting the multi-component of the plant leaves, which improves the testing efficiency and the testing precision, according to claim 1, is characterized in that: the xenon lamp switch (24) is arranged on the side face of the bottom box (4), and the xenon lamp switch (24) is electrically connected with the circuit board (6).

Technical Field

The invention relates to the field of analytical instruments, in particular to a plant leaf multi-component detection device capable of improving the testing efficiency and precision.

Background

The traditional leaf component detection generally adopts a lossy physical and chemical analysis method, has destructiveness although high detection precision, and has long monitoring period, and cannot realize real-time online detection. In recent years, the near infrared spectrum technology is widely applied to the fields of agriculture, industry, food and the like due to the characteristics of rapidness, high efficiency, greenness, no pollution and the like. The Near Infrared (NIR) spectral region is an electromagnetic wave between the Visible (VIS) and Mid Infrared (MIR) regions and has a wavelength range of 800 to 2500nm, as specified by the American society for testing and materials. The near infrared spectrum is a frequency doubling and combined spectrum band of molecular vibration spectrum, mainly refers to the absorption of hydrogen-containing groups C-H, O-H, N-H and S-H, and contains rich information of most types of organic matter compositions and molecular structures. The lambert-beer law of absorption is the theoretical basis for near infrared spectroscopic analysis: the spectral characteristics of a sample vary with its composition and inherent structural transformations. Because different groups or the same group has obvious difference in absorption wavelength in different chemical environments, the organic compound can be used as an effective carrier for acquiring composition or property information of organic compounds. Certain substances (such as certain inorganic compounds) without near infrared spectrum absorption can indirectly reflect the information through the spectrum change caused by the influence of the substances on the coexisting bulk substances. An inversion model of crop component content based on near infrared spectrum is established, and the model is used in detection equipment, so that a quick use method is provided for realizing timely growth monitoring of large-area planted crops and agricultural product development.

In the prior art, a reference measurement mode with two wavelengths is adopted, and the characteristic that the spectrum of chlorophyll, nitrogen and water has no absorption (or no reflection) at a certain wavelength and the spectrum of the other wavelength has strong absorption (or reflection) is utilized, and the value of a certain content is inverted through linear modeling and is converted into a ternary linear equation:

y content M1X 1+ M2X 2+ M3.

Wherein, M1, M2 and M3 are fixed coefficients (constants) after regression modeling, X1 is a relative absorption or reflection spectrum value under a wavelength without absorption or reflection, and X2 is a relative absorption or reflection spectrum value under a wavelength with stronger absorption or reflection.

Fig. 9 shows the reflectance spectrum of leaf lettuce, a measurement of a reference: the measured change slope is the highest, 750nm is selected as the measurement wavelength, the change slope at the reference position approaches to 0, and 830nm is selected as the reference wavelength.

The instrument is loaded with 2 near-infrared LED light emitting sources with single characteristic wavelength, an optical filter, a photoelectric sensor, a singlechip and the like, and the formula is implanted into the singlechip.

The defects of the prior art are as follows: because the characteristic wavelengths of different chemical contents such as nitrogen, moisture, chlorophyll and the like of the same plant leaf are not consistent, the characteristic wavelengths of different plant types are not necessarily the same, the accuracy of the model for inverting different contents is lost by using two LED lamps emitting specific wavelengths, if the contents of components simultaneously measured by the existing instrument and a destructive physical and chemical method are compared, R is generally used²(correlation coefficient) to express the accuracy of the instrument, R²The closer to 1, the higher the precision is, the correlation of the existing instrument is about 0.75, and the correlation has a space for improving; a laboratory usually adopts a dark box, a lens, a tungsten lamp/xenon lamp (capable of emitting near infrared light with continuous wavelength) and a spectrometer (capable of measuring spectrum with continuous wavelength) to collect reflection/absorption values under multipoint wavelengths, and performs modeling and component content calculation of the multipoint characteristic wavelengths through a computer. Many data show that the related performance of the method reaches above 0.85, but the method is difficult to carry to the field for online detection and has complex test flow.

Therefore, a plant leaf multi-component detection device with improved testing efficiency and precision is needed to solve the above problems.

Disclosure of Invention

The invention aims to provide a plant leaf multi-component detection device for improving the testing efficiency and precision, and aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a plant leaf multicomponent detection device for improving test efficiency and precision, which comprises a plant leaf multicomponent detection device for improving test efficiency and precision, and a handle, a test mechanism and a switching mechanism, wherein the handle is arranged on the test mechanism; the testing device comprises a handle, a trigger, a testing device and a switching device, wherein the handle is of a pistol-shaped structure, the bottom of the handle is connected with the trigger in a sliding manner, one end of a spring is fixedly connected to the side surface of the trigger, the other end of the spring is fixedly connected to the side surface of the handle, the testing device is arranged at the top of the handle, and the switching device is arranged at the top of the trigger;

the testing mechanism comprises a bottom box, an embedded system support is fixedly connected to the top of the bottom box, a circuit board is arranged in an inner cavity of the bottom box, a lithium battery is arranged at the top of the inner cavity of the bottom box, the lithium battery is electrically connected with the circuit board, a photoelectric sensing assembly is arranged on the circuit board, an optical fiber focusing mirror coupler is arranged at one end of the circuit board, a spectrum assembly is electrically connected to the other end of the circuit board, the optical fiber focusing mirror coupler is electrically connected with the spectrum assembly, the spectrum assembly is located on the same plane with the switching mechanism, and a PC end is electrically connected to the top of the circuit board.

Preferably, the switching mechanism includes the shading pipe, the bottom surface rigid coupling of shading pipe has the supporting seat, the bottom surface of supporting seat with the top surface rigid coupling of trigger, one side of shading pipe is provided with the commentaries on classics board, the top of commentaries on classics board is inlayed and is equipped with standard reflection blank, the bottom of commentaries on classics board is inlayed and is equipped with standard and absorbs the blackboard, commentaries on classics board side middle part rigid coupling has the one end of damping axle, the other end of damping axle with the mouth of pipe department outer wall top of shading pipe rotates and is connected.

Preferably, the spectrum assembly comprises a micro diffuse reflection probe shell, the bottom surface of the micro diffuse reflection probe shell is fixedly connected with the top surface of the handle, a xenon lamp is fixedly connected to the top surface of the inner cavity of the micro diffuse reflection probe shell, a USB interface is arranged on the bottom surface of the bottom box, the USB interface penetrates through the bottom surface of the bottom box and is electrically connected with the circuit board, the xenon lamp is electrically connected with the USB interface, the optical fiber focusing mirror coupler is electrically connected with one end of a multimode optical fiber, and the other end of the multimode optical fiber is communicated with the inner cavity of the micro diffuse reflection probe shell.

Preferably, the top of the circuit board is electrically connected with one end of a USB light beam, and the other end of the USB light beam penetrates through the top surface of the bottom box and extends into the embedded system bracket.

Preferably, the photoelectric sensing assembly comprises a photoelectric sensor, plastic positioning hoops are fixedly connected to two sides of the outer wall of the photoelectric sensor, the plastic positioning hoops are fixedly connected to the top surface of the circuit board, a patch connector is arranged on the top surface of the circuit board, two ends of the patch connector are respectively electrically connected with the circuit board and the photoelectric sensor, and the optical fiber focusing mirror coupler is electrically connected with the photoelectric sensor.

Preferably, the central line of the shell of the micro diffuse reflection probe coincides with the axis of the shading pipe.

Preferably, the areas of the standard reflection white board and the standard absorption white board are both larger than the pipe diameter of the shading pipe.

Preferably, the bottom surface of the bottom box is fixedly connected with a support frame, and the bottom surface of the support frame is fixedly connected with the top surface of the handle.

Preferably, the top surface rigid coupling of trigger has T type slider, the bottom surface of handle seted up with T type groove of T type slider looks adaptation, T type slider with T type groove sliding connection.

Preferably, a xenon lamp switch is arranged on the side face of the bottom box and electrically connected with the circuit board.

The invention discloses the following technical effects: the invention combines the laboratory method for cutting, the continuous wavelength spectrum test and the two-wavelength one-measurement-one-reference method for creating a multi-point wavelength spectrum measurement, selects two different wavelengths for one-measurement-one-reference according to different content types under different types of plant leaves and the same type of plant leaves, and improves the R under the original limitation condition²And aiming at the continuous wavelength reflection spectrum, a test mechanical structure is designed, and compared with a complicated test flow in a laboratory, the test efficiency is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a testing mechanism according to the present invention;

FIG. 3 is a schematic structural diagram of the switching mechanism of the present invention;

FIG. 4 is a schematic structural view of the bottom case of the present invention;

FIG. 5 is a bottom view of the back box of the present invention;

FIG. 6 is a schematic structural diagram of a photoelectric sensing device according to the present invention;

FIG. 7 is a system block diagram of the present invention;

FIG. 8 is a flow chart of the operation of the present invention;

FIG. 9 is a graph of the reflectance spectrum of leaf lettuce;

FIG. 10 is a flow chart of the operation of the controller of the present invention;

wherein, 1, a handle; 2. a trigger; 3. a spring; 4. a bottom case; 5. an embedded system support; 6. a circuit board; 7. a lithium battery; 8. a fiber optic focusing mirror coupler; 9. a light shielding pipe; 10. a supporting seat; 11. rotating the plate; 12. a standard reflective whiteboard; 13. a standard absorbing blackboard; 14. a damping shaft; 15. a micro diffuse reflection probe housing; 16. a xenon lamp; 17. a USB interface; 18. a multimode optical fiber; 19. a USB light beam; 20. a photoelectric sensor; 21. a plastic positioning hoop; 22. a patch connector; 23. a support frame; 24. xenon lamp switch.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-6, the invention provides a plant leaf multicomponent detection device for improving test efficiency and precision, comprising a handle 1, a test mechanism and a switching mechanism; the handle 1 is arranged in a pistol-shaped structure, the bottom of the handle 1 is connected with a trigger 2 in a sliding manner, one end of a spring 3 is fixedly connected to the side surface of the trigger 2, the other end testing device of the spring 3 fixedly connected to the side surface of the handle 1 is arranged at the top of the handle 1, and the switching device is arranged at the top of the trigger 2;

the testing mechanism comprises a bottom box 4, an embedded system support 5 is fixedly connected to the top of the bottom box 4, a circuit board 6 is arranged in an inner cavity of the bottom box 4, a lithium battery 7 is arranged at the top of the inner cavity of the bottom box 4, the lithium battery 7 is electrically connected with the circuit board 6, a photoelectric sensing assembly is arranged on the circuit board 6, an optical fiber focusing mirror coupler 8 is arranged at one end of the circuit board 6, a spectrum assembly is electrically connected to the other end of the circuit board 6, the optical fiber focusing mirror coupler 8 is electrically connected with the spectrum assembly, the spectrum assembly and the switching mechanism are located on the same plane, and a PC end is electrically connected to the top of the circuit board 6.

The invention combines the laboratory method for cutting, the continuous wavelength spectrum test and the two-wavelength one-measurement-one-reference method for creating a multi-point wavelength spectrum measurement, selects two different wavelengths for one-measurement-one-reference according to different content types under different types of plant leaves and the same type of plant leaves, and improves the R under the original limitation condition²And aiming at the continuous wavelength reflection spectrum, a test mechanical structure is designed, and compared with a complicated test flow in a laboratory, the test efficiency is improved. Compared with the prior art, the invention not only maintains the miniaturized structure of the original traditional single-content test instrument, but also adds the test of diversified content on the basis of the miniaturized structure, extracts the spectrum under the multi-point wavelength and improves the test precision. And implanting a plurality of preview model formulas into the device, and flexibly selecting different wavelengths to carry out model operation according to different contents of different plants. The diversity of the test types is increased, and the test precision is improved.

The method is implemented by installing a controller on an embedded system bracket 5, electrically connecting the controller with a PC end, electrically connecting the controller with a circuit board 6, implanting a wavelength model into the controller through the PC end, placing a blade to be tested in a shading tube 9 after a development stage, starting a xenon lamp 16 to provide a light source, converting a white board and a blackboard through a rotating plate 11 to perform dark spectrum, total reflection and reflection spectrum switching tests, transmitting measured data into an optical fiber focusing mirror coupler 8 through a multimode optical fiber 18, transmitting the data to a photoelectric sensor 20 through the optical fiber focusing mirror coupler 8, converting the obtained spectrum into an electric signal and transmitting the electric signal to the controller through the photoelectric sensor 20, calibrating and transmitting the wavelength to the PC end through the controller, processing the obtained spectrum data through the controller, and performing operation through the introduced model to display a result.

The controller is a photoelectric integrated system, the MCU controls the light source to emit standard light waves, light which is irradiated to a tested sample is reflected and is irradiated to the CMOS optical sensor after being split by the optical system (C14384MA), the conversion from optical signals to electric signals is completed, and then analog electric signals are converted into digital electric signals through the AD analog-to-digital converter (the electric signals are in direct proportion to the illumination intensity of the internal light source). The illumination intensity is collected by an FPGA (programmable logic device), and is calculated and analyzed by an MCU control unit and displayed by a display. In the development stage, the MCU transmits data to a computer through a USB (universal serial bus) line, and wavelength calibration is carried out on the computer; and in the using stage, the MCU acquires a light intensity value to carry out self calibration and model operation of the instrument.

Further optimization scheme, the switching mechanism includes shading pipe 9, the bottom surface rigid coupling of shading pipe 9 has supporting seat 10, the bottom surface of supporting seat 10 and the top surface rigid coupling of trigger 2, one side of shading pipe 9 is provided with commentaries on classics board 11, the top of commentaries on classics board 11 is inlayed and is equipped with standard reflection blank 12, the bottom of commentaries on classics board 11 is inlayed and is equipped with standard absorption blackboard 13, commentaries on classics board 11 side middle part rigid coupling has the one end of damping axle 14, the other end of damping axle 14 and the mouth of pipe department outer wall top of shading pipe 9 are rotated and are connected.

The standard reflection white board 12 and the standard absorption blackboard 13 are integrated on the rotating board 11, and the rotating board 11 can be movably mounted on the upper part of the right side of the shading tube 9 through the damping shaft 14, so that the white board and the blackboard can be quickly converted to perform dark spectrum, total reflection and reflection spectrum switching tests, and the test efficiency is improved.

Further optimizing scheme, the spectrum subassembly includes miniature diffuse reflection probe shell 15, miniature diffuse reflection probe shell 15 bottom surface and handle 1 top surface rigid coupling, miniature diffuse reflection probe shell 15 inner chamber top surface rigid coupling has xenon lamp 16, end box 4 bottom surface is provided with USB interface 17, USB interface 17 runs through end box 4 bottom surface and circuit board 6 electric connection, xenon lamp 16 and USB interface 17 electric connection, optical fiber focusing mirror coupler 8 electric connection has the one end of multimode fiber 18, the other end and the miniature diffuse reflection probe shell 15 inner chamber intercommunication of multimode fiber 18.

The xenon lamp 16 can emit near infrared light of continuous wavelength, and is provided for collecting reflection/absorption values under multipoint wavelengths, and modeling and calculating component content of the multipoint characteristic wavelengths are performed through a computer.

According to the further optimized scheme, the top of the circuit board 6 is electrically connected with one end of a USB light beam 19, and the other end of the USB light beam 19 penetrates through the top surface of the bottom box 4 and extends into the embedded system bracket 5.

Further optimize the scheme, the photoelectric sensing subassembly includes photoelectric sensing ware 20, and photoelectric sensing ware 20 outer wall both sides rigid coupling has plastics location hoop 21, and plastics location hoop 21 and 6 top surfaces rigid coupling of circuit board, 6 top surfaces of circuit board are provided with paster connector 22, and the both ends of paster connector 22 respectively with circuit board 6 and photoelectric sensing ware 20 electric connection, optic fibre focus mirror coupler 8 and photoelectric sensing ware 20 electric connection.

Further optimizing the scheme, the central line of the shell 15 of the micro diffuse reflection probe is coincided with the axis of the shading tube 9.

In a further optimization scheme, the areas of the standard reflection white board 12 and the standard absorption blackboard 13 are both larger than the pipe diameter of the light shielding pipe 9.

According to a further optimized scheme, the bottom surface of the bottom box 4 is fixedly connected with a support frame 23, and the bottom surface of the support frame 23 is fixedly connected with the top surface of the handle 1.

Further optimization scheme, the top surface rigid coupling of trigger 2 has T type slider, and the bottom surface of handle 1 is seted up the T type groove with T type slider looks adaptation, T type slider and T type groove sliding connection.

Further optimize the scheme, the side of the bottom box 4 is provided with a xenon lamp switch 24, and the xenon lamp switch 24 is electrically connected with the circuit board 6.

Referring to fig. 7-8, which is a system structure diagram of the device, a light source is emitted from the device, and irradiates a measured object to enter a slit of a photoelectric sensor through reflection of a lens, the photoelectric sensor (hamamatsu C14384MA) generates 256 pieces of pixel information, and the development stage utilizes four times of fitting method calibration to obtain:

λ(x)＝ax⁴+bx³+cx²+dx+e

wherein a, b, c, d, e are constants.

The wavelength corresponding to each pixel after calibration is a fixed value, and the pixel information is the light intensity value. I.e. reflection information at multiple wavelengths can be obtained.

When carrying out the instrument self-calibration, do not place the measured object in the middle of the anchor clamps, damping axle 14 switches to black absorption plate, and the right side probe laminating absorbs the board, can measure the dark spectrum of instrument this moment, and the dark spectrum can be regarded as the stack of the external light leak error of anchor clamps and the current noise of instrument internal circuit board, and the light intensity bias under the instrument measured continuous wavelength this moment is as the error value, records as array e, and the expression is:

e＝{e₁，e₂，e₃，...，e_n}

where n is the total number of wavelengths.

When the instrument measures, damping axle 14 switches to standard blank earlier, does not place the measured object in the middle of the anchor clamps, and the white board is laminated to the probe, and the total reflection light intensity set that measures the instrument at this moment is:

S1＝{s1₁，s1₂，s1₃，...，s1_n}

clamping the blade, and measuring the reflected light intensity set of the blade as follows:

S2＝{s2₁，s2₂，s2₃，...s2_n}

the reflectivity set of the blade is:

i.e. the reflectance values at n wavelengths are measured.

According to the traditional one-measurement one-reference theory, various content models of a plurality of ternary one-time linear various types of blades are implanted into a single chip microcomputer, model selection is carried out according to the actually measured blades, and the content is calculated.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.