Water quality probe using optical fiber transmission

Abstract

The utility model provides a kind of water quality probe using optical fiber transmission, it is related to water quality environmental protection monitoring technical field, including: probe shell, for immersing in the water body to be measured, and two glasses are equipped in probe shell, two The measurement area is formed between glass;Two-in-one optical fiber, one end is equipped with optical fiber two-in-one outlet, and is set correspondingly measurement area, and the other end extends to probe shell outside, and is connected with the control host computer of external;Reflecting mirror, set in probe shell interior;The utility model adopts split design, realizes the physical isolation of key optical element and water body, help to improve equipment stability and service life;And two-in-one optical fiber is used to realize the emission and reception of all-optical section optical signal, realizes the original reflection of light beam using reflecting mirror, can accurately correspond the same position of measurement area, avoids the measurement deviation caused by emission, receiving light path deviation, improves data accuracy.

Description

Technical Field

[0001] This utility model relates to the field of water quality environmental monitoring technology, and in particular to a water quality probe that utilizes optical fiber transmission. Background Technology

[0002] In the field of environmental monitoring, water quality testing is an important means of assessing the degree of water pollution and ensuring the safety of the water environment. Traditional water quality testing methods mostly rely on chemical reagent methods, such as titration and spectrophotometry. Although these methods have high accuracy, they suffer from problems such as high maintenance costs, complex operation procedures, low monitoring frequency, and difficulty in providing real-time feedback on dynamic changes in water quality. In addition, traditional methods often require manual sampling and laboratory analysis, which takes a long time and makes it difficult to capture sudden pollution events in a timely manner, thus limiting the responsiveness of water environment management. In recent years, with the advancement of optical sensing and data analysis technologies, water quality probes based on spectral analysis have been increasingly widely used in online monitoring systems. These probes use the spectral absorption, scattering, or fluorescence characteristics of specific wavelength bands to achieve rapid identification and quantitative analysis of water quality parameters (such as chemical oxygen demand (COD), ammonia nitrogen, turbidity, chlorophyll, etc.).

[0003] However, existing spectroscopic water quality probes typically integrate the spectrometer and light source (such as a xenon lamp) into the probe housing, resulting in a bulky and complex probe with poor waterproof performance. Water ingress due to aging of the sealing rings or vibration can damage expensive optical components. Furthermore, limited internal space makes it difficult to integrate cleaning devices, requiring external cleaning structures, which increases system complexity and cost. Additionally, the optical components require high installation accuracy and are prone to misalignment during transportation or use, affecting optical path alignment and signal stability. Therefore, there is an urgent need for a water quality probe that is compact, waterproof, optically stable, and easy to maintain to improve the reliability and practicality of online water quality monitoring. Utility Model Content

[0004] This invention proposes a water quality probe that utilizes optical fiber transmission to solve the problems of existing spectral water quality probes, such as large size, poor water resistance, easy damage, and difficulty in cleaning.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water quality probe utilizing optical fiber transmission, comprising:

[0006] The probe housing is used to be immersed in the water body to be measured, and the probe housing is provided with two glass panes, forming a measurement area between the two glass panes;

[0007] The two-in-one optical fiber has a two-in-one optical fiber outlet at one end, which is set to correspond to the measurement area, and the other end extends to the outside of the probe housing and is connected to an external control host.

[0008] A reflector is installed inside the probe housing and corresponds to the fiber optic dual-in-one outlet of the dual-in-one fiber optic cable. It is used to reflect the light emitted by the xenon lamp back to the dual-in-one fiber optic cable. The reflector is connected to a reflector adjustment column, and the reflector adjustment column is threadedly engaged with the probe housing.

[0009] A cleaning structure is used to clean the light-transmitting surfaces on both sides of the measurement area.

[0010] Preferably, the probe housing includes an upper housing, a lower housing, and a housing body. The upper housing and the lower housing are respectively connected to the housing body via threads. The reflector is disposed inside the lower housing.

[0011] Preferably, the control host is equipped with a data acquisition module and a lamp body, the lamp body is a xenon lamp, and one end of the two-in-one optical fiber extending to the outside of the probe housing is connected to the data acquisition module and the lamp body respectively.

[0012] Preferably, the cleaning structure includes:

[0013] A cleaning brush motor is installed inside the upper housing, and a cleaning brush is mounted on the output end of the cleaning brush motor via an output shaft;

[0014] The cleaning brush control board is installed inside the upper housing.

[0015] Preferably, the upper end of the upper housing is provided with an optical fiber outlet, and a sealing ring is provided at the optical fiber outlet.

[0016] Preferably, the upper ends of the two-in-one optical fiber are the xenon lamp line inlet and the spectrometer inlet, respectively, and the probe housing is also equipped with an optical fiber collecting mirror.

[0017] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0018] (1) This utility model adopts a split design, placing the measuring probe in the water while the spectrometer and xenon lamp are placed outside the water body, realizing the physical isolation of key optical components from the water body, which helps to improve the stability and service life of the equipment.

[0019] (2) This utility model uses a two-in-one optical fiber to realize the transmission and reception of optical signals across the entire optical spectrum. The optical fiber material is a high-strength radiation-resistant optical cable. The beam emitted by the xenon lamp enters through the xenon lamp body fiber inlet, exits through the two-in-one optical fiber outlet, passes through the measurement area between the two glass plates, reaches the opposite reflector, returns along the original path, re-enters the two-in-one optical fiber, and finally enters the spectrometer through the spectrometer inlet for analysis. This realizes the original path reflection of the beam using the reflector, which can accurately correspond to the same position in the measurement area, avoid measurement deviation caused by the offset of the transmission and reception optical paths, and improve data accuracy.

[0020] (3) The reflector adopts a threaded adjustment structure. The plane angle can be adjusted by rotating the reflector adjustment column to obtain the best reflection angle. At the same time, the thread on the adjustment column cooperates with the main body of the housing. When rotated, the distance between the reflector and the glass can be changed, thereby adjusting the reflected light intensity and ensuring that the signal strength is within a suitable range.

[0021] (4) The measurement area is isolated by two pieces of glass, a two-in-one optical fiber and a reflector, which effectively prevents the pollution of turbid substances in the water. The cleaning structure cleans the glass surface, which can avoid pollutants from affecting the light transmission and ensure the quality of signal transmission. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure under the first embodiment of the present invention;

[0024] Figure 2 This is an appearance drawing of the first embodiment of the present invention;

[0025] Figure 3 This utility model Figure 2 Sectional view along axis AA;

[0026] Figure 4 This is a schematic diagram of the structure of the two-in-one optical fiber according to the first embodiment of this utility model;

[0027] Figure 5 This is a simplified diagram of the light path under the first embodiment of this utility model;

[0028] Figure 6 This is a schematic diagram of the overall structure under the second embodiment of the present invention;

[0029] Figure 7 This is a simplified diagram of the light path under the second embodiment of this utility model;

[0030] Figure 8 This is a simplified diagram of the light path under the third embodiment of this utility model;

[0031] In the diagram: 1. Control host; 101. Acquisition module; 102. Lamp body; 2. Upper housing; 3. Lower housing; 4. Main housing body; 5. Cleaning brush motor; 6. Cleaning brush control board; 7. Cleaning brush; 8. Two-in-one fiber optic cable; 81. Two-in-one fiber optic cable outlet; 82. Xenon lamp line inlet; 83. Spectrometer inlet; 9. Fiber optic collecting mirror; 10. Reflector adjustment column; 11. Glass; 12. Reflector; 13. Fiber optic cable outlet; 14. Threaded groove; 15. First fiber optic cable; 16. Second fiber optic cable; 17. Reflector assembly; 18. Third fiber optic cable; 19. Fourth fiber optic cable. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1:

[0034] like Figures 1-5As shown, this utility model provides a water quality probe utilizing optical fiber transmission, comprising a control host 1, a probe housing, a two-in-one optical fiber 8, and a reflector 12. The control host 1 is equipped with a data acquisition module 101 and a lamp body 102. The data acquisition module 101 is a spectrometer, and the lamp body 102 is a xenon lamp. The probe housing is used to immerse the water to be tested. The probe housing includes an upper housing 2, a lower housing 3, and a housing body 4. The upper housing 2 and the lower housing 3 are respectively connected to the housing body 4 via threads. The upper end of the upper housing 2 is provided with an optical fiber outlet 13, and a sealing ring is provided at the optical fiber outlet 13. The reflector 12 is disposed inside the lower housing 3, and two glass panes 11 are provided inside the probe housing, forming a measurement area between the two glass panes 11. One end of the two-in-one optical fiber 8 is provided with a two-in-one optical fiber outlet 81, which is set corresponding to the measurement area. The other end of the two-in-one optical fiber 8 extends outside the probe housing. The upper end of the two-in-one optical fiber 8 is respectively a xenon lamp line inlet 82 and a spectrometer inlet 83, which are connected to the lamp body 102 and the data acquisition module 102, respectively. Module 101, the acquisition module 101, and the lamp body 102 are located externally and do not directly contact the water. The reflector 12 is located inside the probe housing and corresponds to the fiber optic dual-fiber outlet 81 of the dual-fiber 8. It is used to reflect the light emitted by the xenon lamp back to the dual-fiber 8. The reflector 12 is connected to the reflector adjustment column 10. The lower housing 3 has a threaded groove 14, so that the reflector adjustment column 10 and the probe housing are connected by a thread. The probe housing also has a fiber optic collecting mirror 9. Rotating the reflector adjustment column 10 can drive the reflector 12 to rotate, which can adjust the plane of the reflector 12. When rotating the reflector adjustment column 10, the plane of the reflector 12 is also rotated, which prompts the continuous adjustment of the angle of the reflector 12 to achieve the most suitable reflection angle. The threads on the reflector adjustment column 10 and the housing body 4 rotate to lengthen and shorten the distance between the reflector 12 and the glass 11, which can adjust the distance between the reflector 12 and the dual-fiber 8, thereby adjusting the light intensity.

[0035] The aforementioned dual-fiber optic cable 8 employs a high-strength radiation-resistant pipeline, exhibiting excellent environmental adaptability and signal stability, and is used for the transmission and reception of light across the entire optical spectrum. Light emitted from the xenon lamp enters the dual-fiber optic cable 82 via the xenon lamp line inlet 82, is emitted from the dual-fiber outlet 81 to the measurement area, is reflected back into the dual-fiber optic cable 8 by the reflector 12, and then enters the spectrometer through the spectrometer inlet 83 for analysis. The specific light path is as follows... Figure 5 As indicated by the middle arrow.

[0036] In addition, the water quality probe using optical fiber transmission provided by this utility model also includes a cleaning structure. The cleaning structure is used to clean the light-transmitting surfaces on both sides of the measurement area, that is, it is specifically used to clean the glass 11 to ensure that the light-transmitting surfaces are always kept clean.

[0037] For details, please refer to Figure 1 and Figure 3As shown, the cleaning structure mainly consists of a cleaning brush motor 5 and a cleaning brush control board 6, both of which are integrated inside the upper housing 2. The output end of the cleaning brush motor 5 is equipped with a cleaning brush 7 via an output shaft. The cleaning brush motor 5 provides a stable driving force for the cleaning brush 7. Two glass panes 11 separate the area to be measured from the two-in-one optical fiber 8 and the reflector 12. The cleaning structure cleans the surfaces of these two glass panes 11, effectively removing suspended turbidity, impurities, and other pollutants from the water. In actual use, the cleaning brush 7 operates under the drive of the cleaning brush motor 5, thoroughly wiping and cleaning the surfaces of the two glass panes 11 to prevent turbidity from adhering to and contaminating the surfaces of the glass panes 11. This prevents problems such as decreased optical fiber transmission efficiency and distorted measurement data caused by dirt on the light-transmitting surface, ensuring the accuracy and stability of the entire measurement process.

[0038] As described above, in actual operation, the operator can precisely fine-tune the pitch angle and horizontal position of the reflector 12 using the reflector adjustment column 10 provided with the equipment, repeatedly calibrating until the reflector 12 reaches the optimal reflective state, ensuring a stable and unbiased light reflection path. After calibration, the xenon lamp is activated and emits a stable detection light beam. This light beam is transmitted to the preset measurement area through the two-in-one optical fiber 8. When the light beam passes through the water body to be measured within the measurement area, it interacts with pollutants, dissolved substances, etc. in the water body, and then passes through the calibrated reflector 12. 2. The light is reflected back to the two-in-one optical fiber 8 along the original path. The reflected light is then transmitted to the spectrometer again along the two-in-one optical fiber 8. The spectrometer quickly obtains key water quality data such as turbidity, COD, and ammonia nitrogen of the water body to be tested by analyzing the spectral characteristics and intensity changes of the light. In order to avoid the accumulation of stains and scale on the surface of the glass 11 in the measurement area due to long-term use, which would affect the light transmission efficiency and measurement accuracy, the cleaning structure can be activated periodically according to the frequency of use. The cleaning brush 7 is used to gently and thoroughly wipe and clean the surface of the glass 11, so as to continuously ensure the smoothness and cleanliness of the light transmission channel.

[0039] Example 2:

[0040] See Figure 6 and Figure 7As shown, this embodiment differs from Embodiment 1 in that it employs a combined design of the first optical fiber 15 and the second optical fiber 16. The first optical fiber 15 connects to the xenon lamp for efficient transmission of the measurement light emitted by the lamp. The second optical fiber 16 connects to the spectrometer. A mirror group 17, consisting of three mirrors 12, is used. One mirror 12 is horizontally positioned, while the other two mirrors 12 are symmetrically tilted on either side of the horizontal mirror 12. During operation, the measurement light emitted by the xenon lamp is transmitted to the measurement area via the first optical fiber 15. It is then projected onto the first mirror in the mirror group, reflected, and precisely guided to the second mirror within the group. The second mirror then changes the light path direction, stably reflecting the light signal carrying the measurement information to the receiving end of the second optical fiber 16. Finally, the light is transmitted to the spectrometer for data acquisition and analysis. The specific light path is as follows: Figure 7 As shown, this allows for an expansion of the measurement area and improved accuracy of data collection.

[0041] Example 3:

[0042] The difference between this embodiment and embodiment two is that, Figure 8 As shown, this embodiment employs a combined design of a third optical fiber 18 and a fourth optical fiber 19. The third optical fiber 18 connects to the xenon lamp, and the fourth optical fiber 19 connects to the spectrometer. The inner end of the fourth optical fiber 19 is curved, allowing it to be precisely positioned at the glass 11 below the measurement area, and is positioned opposite to the inner end of the third optical fiber 18. This layout design allows the measurement light transmitted from the third optical fiber 18 to directly act on the object being measured in the measurement area. The light signal reflected or transmitted by the object can be directly received by the inner end of the oppositely positioned fourth optical fiber 19. The specific light path is as follows: Figure 8 As shown by the middle arrow, the light signal does not need to be reflected by a mirror, which not only reduces the loss of light signal during transmission, but also reduces the measurement error caused by the offset of the mirror angle.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A water quality probe utilizing optical fiber transmission, characterized in that: include: The probe housing is used to be immersed in the water body to be measured, and the probe housing is provided with two glass (11), and the measurement area is formed between the two glass (11); The two-in-one optical fiber (8) has a two-in-one optical fiber outlet (81) at one end, which is set in accordance with the measurement area, and the other end extends to the outside of the probe housing and is connected to an external control host (1). A reflector (12) is disposed inside the probe housing and corresponds to the fiber optic dual-exit (81) of the dual-fiber (8) to reflect the light emitted by the xenon lamp back to the dual-fiber (8). The reflector (12) is connected to the reflector adjustment column (10), and the reflector adjustment column (10) is threadedly connected to the probe housing. A cleaning structure is used to clean the light-transmitting surfaces on both sides of the measurement area.

2. A water quality probe utilizing optical fiber transmission according to claim 1, characterized in that: The probe housing includes an upper housing (2), a lower housing (3) and a housing body (4). The upper housing (2) and the lower housing (3) are respectively connected to the housing body (4) through the threads of the housing body (4). The reflector (12) is disposed inside the lower housing (3).

3. A water quality probe utilizing optical fiber transmission according to claim 1, characterized in that: The control host (1) is equipped with a data acquisition module (101) and a lamp body (102). The lamp body (102) is a xenon lamp. One end of the two-in-one optical fiber (8) extending to the outside of the probe housing is connected to the data acquisition module (101) and the lamp body (102) respectively.

4. A water quality probe utilizing optical fiber transmission according to claim 2, characterized in that: The cleaning structure includes: A cleaning brush motor (5) is installed inside the upper housing (2), and a cleaning brush (7) is installed at the output end of the cleaning brush motor (5) through the output shaft; The cleaning brush control board (6) is installed inside the upper housing (2).

5. A water quality probe utilizing optical fiber transmission according to claim 2, characterized in that: The upper end of the upper housing (2) is provided with an optical fiber outlet (13), and a sealing ring is provided at the optical fiber outlet (13).

6. A water quality probe utilizing optical fiber transmission according to claim 1, characterized in that: The upper ends of the two-in-one optical fiber (8) are the xenon lamp line inlet (82) and the spectrometer inlet (83), respectively, and the probe housing is also provided with an optical fiber collecting mirror (9).

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