Sensor for measuring oil content in water

Abstract

The invention provides a sensor for measuring oil content in water. The sensor comprises a detection cavity, a light source generator and a light path detector, wherein the light source generator and the light path detector are arranged in the detection cavity; the light source generator generates a first light source group; the light path detector comprises a first lens group, a measuring cavity and a second lens group which are sequentially arranged in the light path direction of the first light source group, and the light path is a straight line; to-be-detected water is stored in the measuring cavity, and the first light source group generates to-be-detected data after passing through the first lens group, the measuring cavity and the second lens group; the light path detector further comprises a second light source group, and the second light source group is arranged in the emergent direction of the light path of the second lens group and used for measuring the data to be detected. According to the sensor provided by the embodiment of the invention, all detection devices are integrated in the detection cavity, and the sensor comprises a plurality of light sources, and has the characteristics of high temperature resistance, wide range, real-time detection and high stability.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to a sensor for measuring oil content in water. Background Art

[0002] Under the background of accelerated industrialization, a large amount of oily wastewater is generated in the production of industries such as petroleum, chemical industry, and machinery manufacturing. This makes it possible to quickly and accurately monitor the mineral oil content in water and reflect the water quality in real time, which is of great significance to water resource environmental monitoring management and sewage treatment. At present, the common methods for oil in water detection include infrared spectrophotometry, non-dispersive infrared photometry, ultraviolet spectrophotometry, and ultraviolet fluorescence. However, the detection steps of infrared spectrophotometry, non-dispersive infrared photometry, and ultraviolet spectrophotometry are cumbersome, and the test liquid must be extracted before testing, which cannot achieve real-time online monitoring.

[0003] Therefore, there is an urgent need for a new type of oil-in-water sensor that can detect water quality in real time online. Summary of the invention

[0004] In view of this, the embodiments of this specification provide a sensor for measuring the oil content in water, so as to achieve the purpose of real-time online detection of water quality.

[0005] The embodiments of this specification provide the following technical solutions:

[0006] A sensor for measuring oil content in water, comprising:

[0007] A detection cavity and a light source generator and a light path detector arranged in the detection cavity;

[0008] The light source generator is used to generate a first light source group;

[0009] The optical path detector comprises a first lens group, a measuring cavity and a second lens group which are sequentially arranged along the optical path direction of the first light source group, wherein the optical path is a straight line;

[0010] The water to be tested is stored in the measuring cavity, and the first light source group generates the data to be tested after passing through the first lens group, the measuring cavity and the second lens group;

[0011] The optical path detector also includes a second light source group, which is arranged in the exit direction of the optical path of the second lens group and is used for measuring the data to be detected.

[0012] Further, the first light source group includes a first light source, a second light source and a third light source;

[0013] The first lens group includes a first convex lens, a second convex lens and a third convex lens;

[0014] The first convex lens, the second convex lens and the third convex lens are respectively arranged in the emission directions of the light paths of the first light source, the second light source and the third light source.

[0015] Furthermore, the principal optical axes of the first convex lens, the second convex lens, and the third convex lens coincide with the principal optical axes of the first light source, the second light source, and the third light source, respectively.

[0016] Furthermore, the first light source, the second light source and the third light source are all light emitting diodes.

[0017] Further, the second lens group includes a fourth convex lens, a fifth convex lens and a sixth convex lens;

[0018] The principal optical axes of the fourth convex lens, the fifth convex lens and the sixth convex lens coincide with the principal optical axes of the first convex lens, the second convex lens and the third convex lens respectively.

[0019] Further, the second light source group includes a first photodiode, a second photodiode and a third photodiode.

[0020] Furthermore, the detection chamber also includes:

[0021] A first optical window group and a second optical window group arranged opposite to each other;

[0022] The first optical window group is arranged on the optical path between the first lens group and the measuring cavity, and the windows of the first optical window group correspond one-to-one to the lenses in the first lens group;

[0023] The second optical window group is arranged on the optical path between the measuring cavity and the second lens group, and the windows of the second optical window group correspond one-to-one to the lenses in the second lens group.

[0024] Further, the first optical window group includes a first optical window, a second optical window and a third optical window;

[0025] The second optical window includes a fourth optical window, a fifth optical window and a sixth optical window.

[0026] Furthermore, the detection chamber also includes:

[0027] A cover, a first conversion head, a second conversion head, and a third conversion head;

[0028] The sealing cover is arranged above the detection cavity, and the first conversion head is arranged on the sealing cover;

[0029] The second conversion head and the third conversion head are arranged at intervals on the side wall of the detection cavity.

[0030] Further, the sensor for measuring the oil content in water also includes a clamping device;

[0031] The clamping device includes a first pressing block and a second pressing block;

[0032] A first special-shaped hole is provided in the first pressing block, a first pressing sheet is provided in the first special-shaped hole, and the first pressing sheet abuts against the second light source group and is used to fix the second light source group;

[0033] The second pressing block is provided with a second special-shaped hole, the second pressing sheet is provided in the second special-shaped hole, and the second pressing sheet abuts against the first light source group and is used to fix the first light source group.

[0034] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0035] The sensor of the embodiment of the present invention integrates all detection equipment in the detection cavity and includes multiple light sources. It has the characteristics of high temperature resistance, wide range, real-time detection and high stability. It can quickly detect oil substances in water at high temperature and can adapt to the detection needs of oil substances of different concentrations. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a front schematic diagram of a sensor for measuring oil content in water according to an embodiment of the present invention;

[0038] Figure 2 is a side schematic diagram of a sensor for measuring oil content in water according to an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of a detection cavity according to an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of a side of a first pressing block to which a second lens group is fixed in an embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of one side of the second pressing block to which the first lens group is fixed according to an embodiment of the present invention.

[0042] 1. The markings in the figure are as follows: 1. cover; 2. first conversion head; 3. first pressing piece; 4. detection cavity; 5. first pressing block; 6. second conversion head; 7. third conversion head; 8. second pressing block; 9. second pressing piece; 10. first gasket; 11. second gasket; 12. third gasket; 13. sixth convex lens; 14. fourth gasket; 15. fifth gasket; 16. sixth gasket; 17. measuring cavity; 18. fourth optical window; 19. fifth optical window; 20. sixth optical window; 21. first optical window; 22. second optical window; 23. third optical window; 24. first light source; 25. second light source; 26. third light source; 27. fifth convex lens; 28. first convex lens; 29. ​​second convex lens; 30. third convex lens; 31. fourth convex lens; 32. first photodiode; 33. second photodiode; 34. third photodiode. DETAILED DESCRIPTION

[0043] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] like Figures 1 to 5 As shown, a sensor for measuring oil content in water comprises:

[0046] A detection cavity 4 and a light source generator and a light path detector arranged in the detection cavity 4; the light source generator is used to generate a first light source group; the light path detector includes a first lens group, a measuring cavity 17 and a second lens group which are arranged in sequence along the light path direction of the first light source group, wherein the light path is a straight line; the water to be detected is stored in the measuring cavity 17, and the first light source group generates the data to be detected after passing through the first lens group, the measuring cavity 17 and the second lens group; the light path detector also includes a second light source group which is arranged in the emitting direction of the light path of the second lens group, and is used to measure the data to be detected.

[0047] The optical path directions of the light source generator, the first lens group, the measuring cavity 17 and the second lens group constitute a measuring optical path channel, and the measuring optical path channel includes a measuring optical path incident channel and a measuring optical path exit channel. The measuring optical path incident channel is the optical path between the first light source group and the measuring cavity 17, and the measuring optical path exit channel is the optical path between the measuring cavity 17 and the second light source group. The light generated by the light source generator after the transmission of the first light source 24, the second light source 25 and the third light source 26 is transmitted to the maximum extent, reducing the energy loss in the light propagation path. At the same time, the light incident through the measuring optical path incident channel is irradiated on the water column of the water quality to be measured in the measuring cavity 17, stimulating the oil in the water quality to be measured to emit fluorescence, and the fluorescence is used as the data to be detected, and the data to be detected is measured by the second light source group.

[0048] The first light source group includes a first light source 24, a second light source 25 and a third light source 26. The first lens group includes a first convex lens 28, a second convex lens 29 and a third convex lens 30. The first convex lens 28, the second convex lens 29 and the third convex lens 30 are respectively arranged in the exit directions of the light paths of the first light source 24, the second light source 25 and the third light source 26. The main optical axes of the first convex lens 28, the second convex lens 29 and the third convex lens 30 coincide with the main optical axes of the first light source 24, the second light source 25 and the third light source 26, respectively.

[0049] Specifically, the first lens group and the second lens group are both used to converge the light source through the lens after the light source passes through the lens.

[0050] The second lens group includes a fourth convex lens 31, a fifth convex lens 27 and a sixth convex lens 13. The principal optical axes of the fourth convex lens 31, the fifth convex lens 27 and the sixth convex lens 13 coincide with the principal optical axes of the first convex lens 28, the second convex lens 29 and the third convex lens 30, respectively.

[0051] Specifically, light is a signal propagating in a straight line, and the main optical axis of the sixth convex lens 13 coincides with the main optical axis of the first convex lens 28, the main optical axis of the fourth convex lens 31 coincides with the main optical axis of the third convex lens 30, and the main optical axis of the fifth convex lens 27 coincides with the main optical axis of the second convex lens 29 in order to obtain the light transmitted through the measurement cavity in the largest range. If the main optical axis of the sixth convex lens 13 is misaligned with the main optical axis of the first convex lens 28, the main optical axis of the fourth convex lens 31 is misaligned with the main optical axis of the third convex lens 30, or the main optical axis of the fifth convex lens 27 is misaligned with the main optical axis of the second convex lens 29, it will inevitably cause the loss of optical signals. The sixth convex lens 13, the fourth convex lens 31 and the fifth convex lens 27 can converge the scattered light in the incident channel of the measurement light path.

[0052] The first light source 24 , the second light source 25 and the third light source 26 are all light emitting diodes (LED light sources).

[0053] The second light source group includes a first photodiode 32 , a second photodiode 33 , and a third photodiode 34 .

[0054] In one embodiment, the detection cavity 4 is in an I-shape.

[0055] Specifically, the detection chamber 4 also includes:

[0056] The first optical window group and the second optical window group, the cover 1, the first conversion head 2, the second conversion head 6 and the third conversion head 7 are arranged opposite to each other.

[0057] like Figure 3 As shown, the first optical window group is arranged on the optical path between the first lens group and the measuring cavity 17, and the windows of the first optical window group correspond one-to-one to the lenses in the first lens group. The second optical window group is arranged on the optical path between the measuring cavity 17 and the second lens group, and the windows of the second optical window group correspond one-to-one to the lenses in the second lens group. The first optical window group includes a first optical window 21, a second optical window 22 and a third optical window 23. The second optical window includes a fourth optical window 18, a fifth optical window 19 and a sixth optical window 20.

[0058] Specifically, a second convex lens 29 is disposed at the front end of the first optical window 21 , a first convex lens 28 is disposed at the front end of the second optical window 22 , and a third convex lens 30 is disposed at the front end of the third optical window 23 .

[0059] The cover 1 is arranged above the detection chamber 4, and the first conversion head 2 is arranged on the cover 1. The second conversion head 6 and the third conversion head 7 are arranged on the side wall of the detection chamber 4 at intervals.

[0060] Specifically, the first conversion head 2 is used to fix or open the cover 1, and after opening the cover 1, the situation in the measuring cavity 17 can be confirmed. The second conversion head 6 and the third conversion head 7 are respectively used for the inlet and outlet of the water to be detected.

[0061] like Figure 1 As shown, the sensor for measuring the oil content in water also includes a clamping device;

[0062] The clamping device includes a first pressing block 5 and a second pressing block 8. The first pressing block 5 and the second pressing block 8 are arranged at the groove of the I-shaped detection cavity 4, and the first pressing block and the second pressing block 8 are symmetrical with respect to the I-shaped detection cavity 4. A first special-shaped hole is arranged in the first pressing block 5, and the first pressing sheet 3 is arranged in the first special-shaped hole. The first pressing sheet 3 abuts against the second light source group and is used to fix the second light source group. A second special-shaped hole is arranged in the second pressing block 8, and the second pressing sheet 9 is arranged in the second special-shaped hole. The second pressing sheet 9 abuts against the first light source group and is used to fix the first light source group.

[0063] The two side surfaces of the detection cavity 4 are respectively provided with through holes connected with the side surfaces of the first pressing plate 3 and the second pressing plate 9. The through holes are light-transmitting holes. In actual use, the first light source generated by the light source generator passes through the first lens group, the first optical window group, the measuring cavity 17, the second optical window group, and the second lens group in sequence to reach the optical path detector to realize the detection of oil content in water.

[0064] Specifically, the light source generator and the optical path detector are both arranged in the detection cavity 4, and the detection cavity 4 is connected with the first pressing block 5, the second pressing block 8, the first pressing plate 3, the second pressing plate 9 and the measuring cavity 17 to ensure the passability of the optical path and achieve minimum optical power loss in the optical path detector.

[0065] like Figure 4 and Figure 5 As shown, the sensor for measuring the oil content in water also includes a gasket group. The gasket group includes a first gasket 10, a second gasket 11, a third gasket 12, a fourth gasket 14, a fifth gasket 15 and a sixth gasket 16. The gasket group is arranged on the periphery of each lens of the first lens group and the second lens group to protect and fix the lens.

[0066] Beneficial effects of the embodiments of the present invention:

[0067] The sensor of the embodiment of the present invention can realize non-contact detection and real-time online monitoring of the oil content in water, and is pollution-free. It has high stability and sensitivity when working continuously, is pollution-free, has low power consumption, and is easy to promote and use; the sensor of the embodiment of the present invention adopts a non-contact design, has a structural anti-fouling function, and the detector is not easy to be polluted, thereby realizing high-temperature and high-pressure water oil monitoring; the sensor of the embodiment of the present invention includes multiple light sources, and the multi-light source and wide-range design is suitable for the detection of oil in different states in water; the sensor of the embodiment of the present invention integrates all detection equipment in the detection cavity, has the characteristics of high temperature resistance, wide range, real-time detection and high stability, can quickly detect oil substances in water at high temperature, can adapt to the detection needs of oil substances of different concentrations, has real-time online monitoring function, and can timely discover and warn potential leakage events.

[0068] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A sensor for measuring oil content in water, characterized in that: include: A detection cavity (4) and a light source generator and a light path detector arranged in the detection cavity (4); The light source generator is used to generate a first light source group; The optical path detector comprises a first lens group, a measuring cavity (17) and a second lens group which are sequentially arranged along the optical path direction of the first light source group, wherein the optical path is a straight line; The water to be tested is stored in a measuring cavity (17), and the first light source group generates data to be tested after passing through the first lens group, the measuring cavity (17) and the second lens group; The optical path detector further includes a second light source group, which is arranged in the exit direction of the optical path of the second lens group, and is used for measuring the data to be detected.

2. The sensor for measuring oil content in water according to claim 1, characterized in that: The first light source group comprises a first light source (24), a second light source (25) and a third light source (26); The first lens group includes a first convex lens (28), a second convex lens (29) and a third convex lens (30); The first convex lens (28), the second convex lens (29) and the third convex lens (30) are respectively arranged in the emission directions of the light paths of the first light source (24), the second light source (25) and the third light source (26).

3. The sensor for measuring oil content in water according to claim 2, characterized in that: The main optical axes of the first convex lens (28), the second convex lens (29) and the third convex lens (30) coincide with the main optical axes of the first light source (24), the second light source (25) and the third light source (26) respectively.

4. The sensor for measuring oil content in water according to claim 2, characterized in that: The first light source (24), the second light source (25) and the third light source (26) are all light emitting diodes.

5. The sensor for measuring oil content in water according to claim 2, characterized in that: The second lens group comprises a fourth convex lens (31), a fifth convex lens (27) and a sixth convex lens (13); The main optical axes of the fourth convex lens (31), the fifth convex lens (27) and the sixth convex lens (13) respectively coincide with the main optical axes of the first convex lens (28), the second convex lens (29) and the third convex lens (30).

6. The sensor for measuring oil content in water according to claim 1, characterized in that: The second light source group includes a first photodiode (32), a second photodiode (33) and a third photodiode (34).

7. The sensor for measuring oil content in water according to claim 1, characterized in that: The detection chamber (4) further comprises: A first optical window group and a second optical window group arranged opposite to each other; The first optical window group is arranged on the optical path between the first lens group and the measuring cavity (17), and the windows of the first optical window group correspond one-to-one to the lenses in the first lens group; The second optical window group is arranged on the optical path between the measuring cavity (17) and the second lens group, and the windows of the second optical window group correspond one-to-one to the lenses in the second lens group.

8. The sensor for measuring oil content in water according to claim 7, characterized in that: The first optical window group comprises a first optical window (21), a second optical window (22) and a third optical window (23); The second optical window includes a fourth optical window (18), a fifth optical window (19) and a sixth optical window (20).

9. The sensor for measuring oil content in water according to claim 1, characterized in that: The detection chamber (4) further comprises: A cover (1), a first conversion head (2), a second conversion head (6) and a third conversion head (7); The sealing cover (1) is arranged above the detection chamber (4), and the first conversion head (2) is arranged on the sealing cover (1); The second conversion head (6) and the third conversion head (7) are arranged at intervals on the side wall of the detection chamber (4).

10. The sensor for measuring oil content in water according to claim 1, characterized in that: The sensor for measuring the oil content in water also includes a clamping device; The clamping device comprises a first pressing block (5) and a second pressing block (8); A first special-shaped hole is provided in the first pressing block (5), a first pressing sheet (3) is provided in the first special-shaped hole, and the first pressing sheet (3) abuts against the second light source group and is used to fix the second light source group; A second special-shaped hole is provided in the second pressing block (8), a second pressing sheet (9) is provided in the second special-shaped hole, and the second pressing sheet (9) abuts against the first light source group and is used to fix the first light source group.

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