High-precision on-line measurement liquid phase optical analyzer device

Abstract

The invention provides a high-precision online measurement liquid phase optical analyzer device, which comprises a controller and a sensor, the controller is provided with a display screen, the controller is internally provided with a control system, and the sensor comprises a measurement cell main body, a light source end assembly, a 12-degree scattered light and transmission light combined detection assembly and a 90-degree scattered light detection assembly. Windows are arranged in the symmetrical direction and the 90-degree direction perpendicular to the symmetrical direction on the two sides of the measuring cell main body, and the 90-degree perpendicular window deviates by 3-30 millimeters along the measuring cell main body on the plane where the symmetrical window is located; through the physical roughening and light absorption effects of the knurling pattern cutting groove and the blackening light absorption coating on the inner wall of the measuring cell main body and the deviation of the 90-degree scattered light detection assembly by 3-30 millimeters, the reflection and diffuse reflection intensity of incident light on the inner wall is obviously reduced, the background noise interference is reduced, and the measurement accuracy is improved through the compensation of the light source end. And the purity of transmission and scattering signals is improved.

Description

Technical Field

[0001] The present invention relates to a high-precision on-line measuring liquid-phase optical analyzer device, belonging to the technical field of on-line measuring liquid-phase optical analyzers. Background Art

[0002] An on-line measuring liquid-phase analyzer generally includes a controller and a sensor. A display screen is provided on the controller, and a control system is provided inside the controller. The sensor includes a measurement cell main body, a light source end assembly, and a detection end assembly. Symmetrical windows or windows in the ninety-degree vertical direction are provided on both sides of the measurement cell main body. The light source end assembly and the detection end assembly are respectively arranged on both sides or in the ninety-degree vertical direction of the measurement cell main body through window pressing rings. The light source end assembly and the detection end assembly are connected to the controller through cables.

[0003] At present, the following several defects exist in the on-line measuring liquid-phase analyzers on the market during actual use:

[0004] 1. The inner wall of the measurement cell of the on-line measuring liquid-phase analyzers on the market is smooth, which easily forms reflected light inside the measurement cell, interfering with the detection accuracy of the transmitted light intensity and the scattered light intensity;

[0005] 2. The on-line measuring liquid-phase analyzers on the market only adopt a single solution of small-angle scattering or ninety-degree scattering alone, and cannot perform high-precision compensation for errors caused by factors such as impurities and bubbles. Moreover, ninety-degree scattering is also easily interfered by the reflected light inside the measurement cell, resulting in deficiencies in the measurement types, measurement ranges, and measurement accuracies of the analyzers;

[0006] 3. The on-line measuring liquid-phase analyzers on the market do not solve the problem that the output light intensity of the light source is unstable due to voltage fluctuations, current drift, or attenuation during long-term operation, directly affecting the accuracy of the measurement results.

[0007] Therefore, a high-precision on-line measuring liquid-phase optical analyzer device is proposed. Summary of the Invention

[0008] In view of this, the present invention provides a high-precision on-line measuring liquid-phase optical analyzer device to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial option.

[0009] The technical solution of the present invention is realized as follows: A high-precision on-line measuring liquid-phase optical analyzer device includes a controller and a sensor. A display screen is provided on the controller, and a control system is provided inside the controller. The sensor includes a measurement cell body, a light source end component, a combined detection component for 12-degree scattered light and transmitted light, and a 90-degree scattered light detection component. Windows are provided on both sides of the measurement cell body in symmetric directions and in the 90-degree direction perpendicular to the symmetric direction. The window in the 90-degree vertical direction is offset by 3 to 30 mm along the plane of the window in the symmetric direction on the measurement cell body. The light source end component, the combined detection component for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection component are respectively arranged on both sides of the measurement cell body in symmetric directions and in the 90-degree direction perpendicular to the symmetric direction through window retaining rings. A light source end detector is built in the light source end component. The measurement cell body is provided with a hollow cavity, and the inner wall of the hollow cavity is provided with knurled groove cuttings. The depth of the knurled groove cuttings is 0.2 to 5 mm, and a blackening light-absorbing coating is covered outside the knurled groove cuttings.

[0010] Further preferably, connection flanges are provided at both ends of the measurement cell body.

[0011] Further preferably, the light source end component, the combined detection component for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection component are all connected to the controller through cables.

[0012] Further preferably, a disassembly and assembly threaded clamping part is fixedly connected to one end of the light source end component, the combined detection component for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection component close to the measurement cell body.

[0013] Further preferably, the disassembly and assembly threaded clamping part is tightly connected to the measurement cell body through threads.

[0014] Further preferably, the 90-degree scattered light detector is arranged in the 90-degree lateral direction of the measurement cell body, and the 90-degree scattered light detector is offset by 3 to 30 mm in the vertical direction of the measurement cell body, depending on the working conditions. Further preferably, the measurement cell body is provided with a hollow cavity, and the inner wall of the hollow cavity is provided with knurled groove cuttings. A blackening light-absorbing coating is covered outside the knurled groove cuttings, and the depth of the knurled groove cuttings is 0.2 to 5 mm, depending on the working conditions.

[0015] Due to the adoption of the above technical solutions in the embodiments of the present invention, the following advantages are achieved:

[0016] First, through the knurled groove cuttings and the blackening light-absorbing coating on the inner wall of the measurement cell body, through physical roughening and light-absorbing effects, the reflection and diffuse reflection intensities of incident light on the inner wall are significantly reduced, the background noise interference is reduced, and the purity of the transmitted and scattered signals is improved.

[0017] II. The present invention detects the offset of the 90-degree scattered light detection component in the direction perpendicular to the main body of the measurement cell, deviates from the incident light plane, avoids the contamination of the scattered signal by the residual reflected light in the plane, reduces the detection error, and improves the measurement accuracy of the scattered light intensity.

[0018] III. The present invention works in cooperation with the offset 90-degree scattered light detection end through the combined detection component of 12-degree scattered light and transmitted light to synchronously obtain the transmitted absorbance and scattered light intensity data of the sample. Through joint analysis, information such as absorbance, turbidity, and particle size distribution can be characterized simultaneously, and the interference of factors such as impurities and bubbles on the measurement accuracy can be reduced, the detection dimension can be expanded, and the comprehensive detection efficiency can be improved.

[0019] IV. The present invention monitors the change of the output light intensity of the light source in real time through the controller, dynamically corrects the light source attenuation caused by voltage fluctuation, current drift, or light source aging, ensures the long-term stability of the transmitted and scattered signals, and reduces the detection error caused by light source fluctuation.

[0020] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the above-described illustrative aspects, embodiments, and features, further aspects, embodiments, and features of the present invention will become apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic axonometric structure diagram of the main body of the measurement cell of the present invention;

[0023] Figure 2 It is an enlarged structure diagram of the hollow cavity of the present invention;

[0024] Figure 3 It is a schematic cross-sectional structure diagram of the knurled groove of the present invention;

[0025] Figure 4 It is an exploded structure diagram of the main body of the measurement cell of the present invention;

[0026] Figure 5 It is a schematic structure diagram of the controller of the present invention.

[0027] Reference Numerals: 1, main body of the measuring cell; 2, light source end assembly; 3, hollow cavity; 4, knurling cutting groove; 5, blackening and light-absorbing coating; 6, ninety-degree scattered light detection assembly; 7, combined detection assembly for twelve-degree scattered light and transmitted light; 8, controller; 9, connecting flange; 10, disassembly and assembly thread clamping part. Detailed Embodiment

[0028] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive. The embodiments of the present invention will be described in detail below with reference to the drawings.

[0029] Embodiment 1

[0030] As Figures 1-5 shown, the embodiment of the present invention provides a high-precision on-line measuring liquid-phase optical analyzer device, including a controller 8 and a sensor. A display screen is provided on the controller 8, and a control system is provided inside the controller 8. The sensor includes a main body 1 of the measuring cell, a light source end assembly 2, a combined detection assembly 7 for twelve-degree scattered light and transmitted light, and a ninety-degree scattered light detection assembly 6. Windows are provided on both sides of the main body 1 of the measuring cell in the symmetric direction and in the ninety-degree direction perpendicular to the symmetric direction. The window in the ninety-degree vertical direction is offset by 3 to 30 mm from the plane of the window in the symmetric direction along the main body of the measuring cell, depending on the working conditions. The light source end assembly 2, the combined detection assembly 7 for twelve-degree scattered light and transmitted light, and the ninety-degree scattered light detection assembly 6 are respectively arranged on both sides of the main body 1 of the measuring cell in the symmetric direction and in the ninety-degree direction perpendicular to the symmetric direction through window retaining rings. A light source end detector is built in the light source end assembly 2. The light source end assembly 2, the combined detection assembly 7 for twelve-degree scattered light and transmitted light, and the ninety-degree scattered light detection assembly 6 are respectively connected to the controller through cables. The main body 1 of the measuring cell is provided with a hollow cavity, and a knurling cutting groove 4 is provided on the inner wall of the hollow cavity. The depth of the knurling cutting groove 4 is 0.2 to 5 mm, depending on the working conditions. A blackening and light-absorbing coating 5 is covered on the outside of the knurling cutting groove 4.

[0031] The light source end component 2, the twelve-degree scattered light and transmitted light combined detection component 7, and the ninety-degree scattered light detection component 6 are all fixedly connected to the end close to the measuring cell body 1 with a disassembly threaded clamp 10. The disassembly threaded clamp 10 is tightly connected to the measuring cell body 1 through a thread. The measuring cell body 1 is made of stainless steel, and the knurled pattern cutting groove 4 and the blackened light-absorbing coating 5 are used to absorb reflected light. The ninety-degree scattered light detection component 6 is arranged at a ninety-degree direction on the side of the measuring cell body 1. The ninety-degree scattered light detection component 6 is offset three to thirty millimeters in the vertical direction of the measuring cell body 1, depending on the working conditions. The depth of the knurled pattern cutting groove 4 is 0.2 to 5 millimeters, depending on the working conditions.

[0032] Example 2

[0033] like Figures 1-5 As shown, in one embodiment, the controller 8 is connected to the light source end assembly 2, the 12-degree scattered light and transmitted light combined detection assembly 7, and the 90-degree scattered light detection assembly 6 via cables. The controller 8 dynamically compensates for attenuation caused by voltage and current fluctuations or light source aging through an algorithm to ensure the stability of detection data.

[0034] When the present invention is working: in this scheme, the measuring cell body 1 is provided with a hollow cavity 3, the light source and the light source detector are arranged in the light source end component 2, and the incident light is vertically incident into the measuring cell body 1 along the direction of the light source end component 2 on the left side of the measuring cell body 1. The inner wall surface of the measuring cell body 1 is processed with knurled cutting grooves 4 and covered with a black light-absorbing coating 5 for absorbing reflected light. The twelve-degree scattered light and transmitted light combination detection component 7 is located at the axial outlet at the other end of the measuring cell body 1 and is coaxially arranged with the incident light source for directly receiving the twelve-degree scattered light and transmitted light intensity signals passing through the measuring cell body 1. The ninety-degree scattered light detection component 6 is arranged at a ninety-degree lateral direction of the measuring cell body 1, but what is different from the prior art is that it can be offset by three to thirty millimeters in the vertical direction of the measuring cell body 1 to deviate from the incident light plane. In order to avoid the interference of residual reflected light in the plane, the light source end component 2, the combined detection component 7 of twelve-degree scattered light and transmitted light, and the ninety-degree scattered light detection component 6 are all connected to the controller 8. The controller 8 dynamically compensates for the attenuation caused by voltage and current fluctuations or light source aging through an algorithm to ensure the stability of the detection data. This solution first reduces the intensity of reflected light by inner wall treatment, and significantly reduces background noise. At the same time, the non-coplanar layout of the ninety-degree scattered light detection component 6 avoids plane reflection interference and reduces the interference of factors such as impurities and bubbles on measurement accuracy, reducing detection errors. The combined analysis of transmission and scattering can simultaneously obtain information such as sample absorbance, turbidity and particle size distribution, thereby improving the overall detection efficiency. The real-time light intensity monitoring and compensation technology controls the errors caused by light source fluctuations, improves long-term detection consistency, has a compact overall structure, and is cost-controllable.

[0035] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An online liquid-phase optical analyzer device with high precision, characterized in that: It includes a controller and sensors. A display screen is provided on the controller, and a control system is provided inside the controller. The sensors include a measurement cell body, a light source end assembly, a combined detection assembly for 12-degree scattered light and transmitted light, and a 90-degree scattered light detection assembly. Windows are provided on both sides of the measurement cell body in the symmetric direction and in the 90-degree direction perpendicular to the symmetric direction. The window in the 90-degree vertical direction is offset by 3 to 30 mm along the measurement cell body in the plane where the window in the symmetric direction is located. The light source end assembly, the combined detection assembly for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection assembly are respectively arranged on both sides of the measurement cell body in the symmetric direction and in the 90-degree direction perpendicular to the symmetric direction through window retaining rings. The light source end assembly is internally provided with a light source end detector. The measurement cell body is provided with a hollow cavity, and the inner wall of the hollow cavity is provided with knurled groove cuts. The depth of the knurled groove cuts is 0.2 to 5 mm, and a blackening light-absorbing coating is covered outside the knurled groove cuts.

2. The high-precision on-line measuring liquid-phase optical analyzer device according to claim 1, characterized in that: Connection flanges are provided at both ends of the measurement cell body.

3. The high-precision on-line measuring liquid-phase optical analyzer device according to claim 1, wherein: The light source end assembly, the combined detection assembly for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection assembly are all connected to the controller through cables.

4. The high-precision on-line measuring liquid-phase optical analyzer device according to claim 1, characterized in that: One end of the light source end assembly, the combined detection assembly for 12-degree scattered light and transmitted light, and the 90-degree scattered light detection assembly close to the measurement cell body are fixedly connected with disassembly and assembly threaded positioning parts.

5. The high-precision on-line measurement liquid-phase optical analyzer device according to claim 4, characterized in that: The disassembly and assembly threaded positioning parts are tightly connected with the measurement cell body through threads.

6. The high-precision on-line measurement liquid-phase optical analyzer device according to claim 1, characterized in that: The 90-degree scattered light detector is arranged in the 90-degree lateral direction of the measurement cell body, and the 90-degree scattered light detector is offset by 3 to 30 mm along the vertical direction of the measurement cell body, depending on the working conditions.

7. An apparatus for a high-precision on-line measurement liquid-phase optical analyzer according to claim 1, wherein: The measurement cell body is provided with a hollow cavity, and the inner wall of the hollow cavity is provided with knurled groove cuts. A blackening light-absorbing coating is covered outside the knurled groove cuts.

8. The high-precision on-line measuring liquid-phase optical analyzer device according to claim 1, characterized in that: The depth of the knurled groove cuts is 0.2 to 5 mm, depending on the working conditions.

9. The device of a high-precision on-line measuring liquid-phase optical analyzer according to claim 1, characterized in that: Through the physical roughening and light-absorbing effects of the knurled groove cuts and the blackening light-absorbing coating on the inner wall of the measurement cell body, and the 90-degree scattered light detection assembly being offset by 3 to 30 mm along the measurement cell body from the plane where the light source end assembly, the combined detection assembly for 12-degree scattered light and transmitted light are located, the reflection and diffuse reflection intensities of the incident light on the inner wall are significantly reduced, the background noise interference is reduced, and through the compensation of the light source end, the purity of the transmitted and scattered signals is improved.

Images