Multi-optical-path measurement module and analyzer

Abstract

The utility model relates to a multi-optical-path measurement module and an analyzer. The multi-optical-path measurement module comprises a transmitting module and a receiving module. The transmitting module comprises a lens, an optical fiber connector and a transmitting lamp; the receiving module comprises a first optical filter, a first photoelectric sensor, a second optical filter, a second photoelectric sensor and a third photoelectric sensor; light emitted by a light source is introduced by the optical fiber connector, is transmitted by the lens and the reaction tank, can be received by the first photoelectric sensor through the first optical filter, and can be received by the second photoelectric sensor through the second optical filter; and light emitted by the other light source emitting lamp passes through the reaction tank and then is received by the third photoelectric sensor, so that the measurement of at least three light paths can be realized. The device can eliminate the influence of other related ions in the water sample to be measured on the measurement result, and is suitable for the complex working condition of the water sample to be measured.

Description

Technical Field

[0001] This application belongs to the technical field of analyzers, and in particular relates to a multi-optical path measurement module and an analyzer. Background Art

[0002] An on-line water quality analyzer is an instrument that uses Lambert-Beer's law to detect the concentration of a certain substance in a liquid. Usually, only one light source is used for measurement. When there are other related ions in the water sample to be measured, there are certain limitations in using a single optical path for measurement, which will affect the accuracy of the measurement results of the instrument. It is necessary to use a multi-optical path measurement to exclude the interference of other ions.

[0003] Currently, there are mainly two types of multi-optical path measurement methods. One is to use a full-spectrum light source xenon lamp and an automatic filter changer. The xenon lamp can provide light of different wavelengths, and the instrument can automatically change the filter during the measurement process to perform measurements of different wavelengths in sequence. The other is to increase the colorimetric cell module. The liquid to be measured digested in the measurement module is pumped into the colorimetric cell by a peristaltic pump. One colorimetric cell module can measure the light of one wavelength, so that different wavelengths can be used for measurement in multiple measurement containers.

[0004] For the method of using a full-spectrum light source and an automatic filter changer, on the one hand, the light source is relatively expensive, generates a lot of heat, and has large fluctuations during measurement. On the other hand, the structure of the automatic filter changer is relatively complex, and production and maintenance are not convenient. For the method of increasing the colorimetric cell module, on the one hand, heating and digestion cannot be carried out simultaneously during measurement, and on the other hand, there will also be certain measurement errors in the measurement results in different containers. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is: to solve the deficiencies in the multi-optical path measurement methods in the prior art, and thus provide a multi-optical path measurement module and an analyzer.

[0006] The technical solution adopted by the present utility model to solve its technical problems is:

[0007] A multi-optical path measurement module includes: a transmitting module and a receiving module. The transmitting module and the receiving module are used to be arranged on opposite sides of the reaction cell, so that the receiving module receives the light emitted by the transmitting module after passing through the reaction cell.

[0008] The transmitting module includes a lens and an optical fiber connector, and the receiving module includes a first filter, a first photoelectric sensor, a second filter, and a second photoelectric sensor; the light led out by the optical fiber connector is refracted by the lens and then received by the first photoelectric sensor after passing through the first filter respectively, and received by the second photoelectric sensor after passing through the second filter; wherein, the wavelengths that the first filter and the second filter can filter are different.

[0009] Preferably, in the multi - optical - path measurement module of the present utility model, the lens and the optical fiber connector are arranged coaxially along a first direction, the first filter and the first photoelectric sensor are arranged coaxially along the first direction, and the second filter and the second photoelectric sensor are arranged coaxially along the first direction.

[0010] Preferably, in the multi - optical - path measurement module of the present utility model, the first filter and the second filter are symmetrically arranged on both sides of the axis of the lens, and the first photoelectric sensor and the second photoelectric sensor are symmetrically arranged on both sides of the axis of the lens.

[0011] Preferably, in the multi - optical - path measurement module of the present utility model, the transmitting module further includes a transmitting lamp, the receiving module further includes a third photoelectric sensor, the third photoelectric sensor is used to receive the light emitted by the transmitting lamp after passing through the reaction cell, the light emitted by the transmitting lamp is light of a single wavelength, and its wavelength is different from the wavelength of the light led out by the optical fiber connector.

[0012] An analyzer includes the multi - optical - path measurement module as described above, and further includes a main body and a reaction cell. The reaction cell is used to hold the liquid to be measured, and the main body has a chamber capable of accommodating the reaction cell; one end of the main body has an opening for the reaction cell to be loaded into the chamber; the transmitting module and the receiving module are arranged on opposite sides of the main body.

[0013] Preferably, the analyzer of the present utility model further includes:

[0014] An upper connector, detachably installed at one end of the main body;

[0015] A lower connector, installed at the bottom of the chamber;

[0016] Both ends of the reaction cell are snap - fitted and fixed to the upper connector and the lower connector respectively.

[0017] Preferably, the analyzer of the present utility model further includes: an upper pressing block and a spring washer;

[0018] The upper pressing block is detachably installed at one end of the main body and is located at the end of the upper joint away from the reaction tank. The spring washer is located between the upper pressing block and the upper joint. The upper pressing block can squeeze the upper joint through the spring washer so that the upper joint clamps the reaction tank.

[0019] Preferably, the analyzer of the present invention further includes a quartz glass, and the quartz glass is installed between the chamber and the receiving module.

[0020] Preferably, in the analyzer of the present invention, the transmitting module includes a light emitting seat, and the lens, the optical fiber joint and the emitting lamp are installed on the light emitting seat. The light emitting seat is connected to the side wall of the main body through a fastener;

[0021] The receiving module includes a receiving seat and an upper cover. The first filter, the first photoelectric sensor, the second filter and the second photoelectric sensor are installed on the receiving seat. The upper cover covers one side of the receiving seat to fix the first filter, the first photoelectric sensor, the second filter, the second photoelectric sensor and the third photoelectric sensor; the receiving seat and the upper cover are connected to the side wall of the main body through fasteners.

[0022] Preferably, the analyzer of the present invention further includes a heating wire, and the heating wire is wound around the reaction tank to be able to heat the reaction tank.

[0023] The beneficial effects of the present invention are as follows: A multi-optical path measurement module and an analyzer provided by the present invention are applicable to working conditions where the water sample to be measured is relatively complex. In the transmitting module thereof, the light of a light source is introduced through an optical fiber joint, then passes through a lens and a reaction tank, reaches the first filter and the second filter and is divided into two specific wavelength lights, which are respectively received by the first photoelectric sensor and the second photoelectric sensor, thereby realizing at least double-optical path measurement. The multi-optical path measurement process is carried out simultaneously in the reaction tank, the light source for measurement, the measurement position and the photoelectric sensor are fixed, and the measurement result is more accurate and the performance is more stable. And no sealing ring that needs to be frequently replaced and maintained is used, and the operation and maintenance amount is small. Description of the Drawings

[0024] The technical solutions of the present application will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1 It is a schematic structural diagram of the analyzer according to the embodiment of the present application;

[0026] Figure 2 It is a schematic cross-sectional structural diagram of the analyzer according to the embodiment of the present application.

[0027] The reference numerals in the drawings are:

[0028] 1. Lower joint;

[0029] 2. Receiving module

[0030] 3. Main body;

[0031] 4. Reaction tank;

[0032] 5. Heating wire;

[0033] 6. Upper pressing block;

[0034] 7. Upper joint;

[0035] 8. Spring washer;

[0036] 9. Transmitting module;

[0037] 10. Lens holder;

[0038] 11. Lens pressing block;

[0039] 12. Lens;

[0040] 13. Fiber optic connector;

[0041] 14. Transmitting lamp;

[0042] 15. Light emitting seat;

[0043] 16. Receiving seat;

[0044] 17. Upper cover;

[0045] 18. Quartz glass;

[0046] 19. Third photoelectric sensor;

[0047] 20. Second photoelectric sensor;

[0048] 21. First photoelectric sensor;

[0049] 22. Second filter;

[0050] 23. First filter. Detailed implementation manners

[0051] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0053] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood through specific circumstances.

[0054] The technical solution of the present application will be described in detail below with reference to the drawings and in combination with embodiments.

[0055] This embodiment provides an analyzer, which includes a multi-optical-path measurement module, such as Figure 1 , Figure 2 As shown, the multi-optical-path measurement module includes: a transmitting module 9 and a receiving module 2. The transmitting module 9 and the receiving module 2 are used to be arranged on opposite sides of the reaction cell 4 so that the receiving module 2 receives the light emitted by the transmitting module 9 after passing through the reaction cell 4.

[0056] The transmitting module 9 includes a lens 12, an optical fiber connector 13, and a transmitting lamp 14. The receiving module 2 includes a first filter 23, a first photoelectric sensor 21, a second filter 22, and a second photoelectric sensor 20. The light emitted from the optical fiber connector 13 can be refracted by the lens 12 to form at least two optical paths. The two optical paths can respectively pass through the first filter 23 and be received by the first photoelectric sensor 21, and pass through the second filter 22 and be received by the second photoelectric sensor 20. Among them, the wavelengths that the first filter 23 and the second filter 22 can filter are different.

[0057] The multi - optical - path measurement module and analyzer provided by the present utility model are applicable to working conditions where the water sample to be measured is relatively complex. In the emission module 9, the light of a light source is introduced through the fiber optic connector 13, then passes through the lens 12 and the reaction cell 4, reaches the first filter 23 and the second filter 22, and then is divided into two paths of light with specific wavelengths, which are respectively received by the first photoelectric sensor 21 and the second photoelectric sensor 20. The multi - optical - path measurement process is carried out simultaneously in the reaction cell. The light source for measurement, the measurement position, and the photoelectric sensors are fixed, so the measurement results are more accurate and the performance is more stable. Moreover, no sealing rings that need to be frequently replaced and maintained are used, and the operation and maintenance amount is small.

[0058] The working principle of the multi - optical - path measurement module and analyzer provided by the present utility model is as follows:

[0059] The fiber optic connector 13 of the emission module 9 is used to connect the light source to introduce the light emitted by the light source. After connecting the light source, the light emitted by the fiber optic connector 13 passes through the lens 12 and the reaction cell 4 and reaches the first filter 23 and the second filter 22. Since the first filter 23 and the second filter 22 can filter different wavelengths, it is divided into two paths of light with specific wavelengths, which are respectively received by the first photoelectric sensor 21 and the second photoelectric sensor 20. A color reaction occurs in the reaction cell 4, and the Lambert - Beer law is used to measure the concentration of the water sample, thereby realizing the measurement of the double - optical - path. It can be understood that in this embodiment, the scenario of two optical paths is taken as an example. In other embodiments, more photoelectric sensors and filters can also be used to realize the measurement of three or more optical paths.

[0060] In an alternative embodiment, as Figure 2 shown, the lens 12 and the fiber optic connector 13 are arranged coaxially along the first direction, the first filter 23 and the first photoelectric sensor 21 are arranged coaxially along the first direction, and the second filter 22 and the second photoelectric sensor 20 are arranged coaxially along the first direction. Under this arrangement, it can be well ensured that the light emitted by the fiber optic connector 13 is respectively received by the first photoelectric sensor 21 and the second photoelectric sensor 20 after passing through the lens 12 and the reaction cell 4.

[0061] In an alternative embodiment, as Figure 2 shown, the first filter 23 and the second filter 22 are symmetrically arranged on both sides of the axis of the lens 12, and the first photoelectric sensor 21 and the second photoelectric sensor 20 are symmetrically arranged on both sides of the axis of the lens 12. Under this arrangement, the first optical path and the second optical path can both be close to the axis of the lens 12, so that the first photoelectric sensor 21 and the second photoelectric sensor 20 can more easily receive the light of two wavelengths respectively.

[0062] In an alternative embodiment, as Figure 2As shown, the transmitting module 9 further includes a transmitting lamp 14, and the receiving module 2 further includes a third photoelectric sensor 19. The third photoelectric sensor 19 is used to receive the light emitted by the transmitting lamp 14 after passing through the reaction cell 4. In this embodiment, the transmitting lamp 14 is another light source (different from the light source connected to the fiber optic connector 13). The light emitted by this light source is light of a single wavelength, and its wavelength is different from the wavelength of the light led out by the fiber optic connector 13. The light emitted by this light source passes through the reaction cell 4 and is received by the third photoelectric sensor 19, thereby enabling the measurement of an additional optical path. Whether this optical path needs to be installed can be determined according to the situation.

[0063] The analyzer provided in this embodiment includes a main body 3 and a reaction cell 4. The reaction cell 4 is used to hold the liquid to be measured, and the main body 3 has a chamber capable of accommodating the reaction cell 4; one end of the main body 3 has an opening for the reaction cell 4 to be inserted into the chamber; the transmitting module 9 and the receiving module 2 are arranged on opposite sides of the main body 3. In the analyzer of this embodiment, through the setting of the main body 3, the reaction cell 4 can be easily fixed inside it, and the transmitting module 9 and the receiving module 2 are respectively arranged on both sides, facilitating the optical path to pass through the reaction cell 4.

[0064] In an optional embodiment, as Figure 1 shown, the analyzer of this embodiment further includes: an upper connector 7 and a lower connector 1. The upper connector 7 is detachably installed at one end of the main body 3, and the lower connector 1 is installed at the bottom of the chamber; both ends of the reaction cell 4 are respectively snap-fitted and fixed with the upper connector 7 and the lower connector 1. In this embodiment, through the setting of the upper connector 7 and the lower connector 1, the reaction cell 4 can be easily detachably installed.

[0065] In an optional embodiment, as Figure 1 shown, the analyzer of this embodiment further includes: an upper pressing block 6 and a spring washer 8; the upper pressing block 6 is detachably installed at one end of the main body 3 and is located at the end of the upper connector 7 away from the reaction cell 4. The spring washer 8 is located between the upper pressing block 6 and the upper connector 7. The upper pressing block 6 can squeeze the upper connector 7 through the spring washer 8 so that the upper connector 7 clamps the reaction cell 4. In this embodiment, through the setting of the spring washer 8, the pressing force of the upper connector 7 on the reaction cell 4 can be made equal to the elastic force of the spring washer 8. The magnitude of this elastic force is relatively stable, and it can ensure that an appropriate pressing force is provided to the reaction cell 4. Preferably, the upper pressing block 6 and the main body 3 are in threaded cooperation so that the spring washer 8 is gradually deformed to generate elastic force when the upper pressing block 6 is tightened.

[0066] In an optional embodiment, as Figure 2As shown, the analyzer of this embodiment further includes a fused silica glass 18, and the fused silica glass 18 is installed between the chamber and the receiving module 2. The fused silica glass 18 plays an isolation and protection role for the receiving module 2, and the fused silica glass 18 can be fixed on the main body 3 by gluing.

[0067] In an alternative embodiment, as Figure 2 shown, the transmitting module 9 includes a light emitting seat 15, the light emitting seat 15 is for installing the lens 12 and the optical fiber connector 13, and the light emitting seat 15 is connected to the side wall of the main body 3 through a fastener; the receiving module 2 includes a receiving seat 16 and an upper cover 17, the receiving seat 16 is for installing the first filter 23, the first photoelectric sensor 21, the second filter 22 and the second photoelectric sensor 20, and the upper cover 17 covers one side of the receiving seat 16 to fix the first filter 23, the first photoelectric sensor 21, the second filter 22 and the second photoelectric sensor 20; the receiving seat 16 and the upper cover 17 are connected to the side wall of the main body 3 through fasteners. In this embodiment, the settings of the light emitting seat 15, the receiving seat 16 and the upper cover 17 can facilitate the installation and replacement of the transmitting module 9 and the receiving module 2. Among them, the fastener can be a workpiece such as a screw or a buckle that is convenient for installation.

[0068] In an alternative embodiment, as Figure 1 shown, the analyzer of this embodiment further includes a heating wire 5, and the heating wire 5 is wound around the reaction cell 4 to be able to heat the reaction cell 4. The heating wire on the reaction cell 4 can heat the liquid in the reaction cell 4 to the required temperature so that a color reaction occurs in the reaction cell 4.

[0069] In an alternative embodiment, as Figure 2 shown, the transmitting module 9 includes a lens seat 10, and the lens 12 is pressed and fixed on the lens seat 10 by a lens pressing block 11. In this embodiment, the disassembly and assembly of the lens 12 are more convenient. Preferably, the lens 12 is fixed by gluing, and there is a threaded fit between the lens seat 10 and the light emitting seat 15.

[0070] In an alternative embodiment, in this embodiment, the receiving module 2 includes a PCB board, and the first photoelectric sensor 21, the second photoelectric sensor 20, and the third photoelectric sensor 19 are soldered on the PCB board. The PCB board and the first filter 23 and the second filter 22 are fixed on the receiving seat 16. In this embodiment, the setting of the PCB board facilitates reducing the difficulty of circuit layout and is beneficial to controlling the installation space.

[0071] In an alternative embodiment, in this embodiment, a peristaltic pump is used to add reagents and water samples into the reaction cell 4.

[0072] Inspired by the above ideal embodiments based on the present application, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this application. The technical scope of this application is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multi-optical path measurement module, characterized in that, Comprising: A transmitting module (9) and a receiving module (2), the transmitting module (9) and the receiving module (2) being configured to be disposed on opposite sides of a reaction cell (4) such that the receiving module (2) receives the light emitted by the transmitting module (9) after passing through the reaction cell (4); The transmitting module (9) includes a lens (12) and an optical fiber connector (13), and the receiving module (2) includes a first filter (23), a first photoelectric sensor (21), a second filter (22), and a second photoelectric sensor (20); the light led out by the optical fiber connector (13) is refracted by the lens (12) and then received by the first photoelectric sensor (21) after passing through the first filter (23), and is received by the second photoelectric sensor (20) after passing through the second filter (22); wherein, the first filter (23) and the second filter (22) can filter different wavelengths.

2. The multi-optical path measurement module according to claim 1, characterized in that The lens (12) and the optical fiber connector (13) are coaxially arranged in a first direction, the first filter (23) and the first photoelectric sensor (21) are coaxially arranged in the first direction, and the second filter (22) and the second photoelectric sensor (20) are coaxially arranged in the first direction.

3. The multi-optical path measurement module according to claim 2, wherein The first filter (23) and the second filter (22) are symmetrically arranged on both sides of the axis of the lens (12), and the first photoelectric sensor (21) and the second photoelectric sensor (20) are symmetrically arranged on both sides of the axis of the lens (12).

4. The multi-optical path measurement module according to any one of claims 1-3, characterized in that, The transmitting module (9) further includes a transmitting lamp (14), and the receiving module (2) further includes a third photoelectric sensor (19), the third photoelectric sensor (19) being configured to receive the light emitted by the transmitting lamp (14) after passing through the reaction cell (4), and the light emitted by the transmitting lamp (14) is light of a single wavelength, the wavelength of which is different from the wavelength of the light led out by the optical fiber connector (13).

5. An analyzer, characterized in that, Comprising the multi-optical-path measurement module according to any one of claims 1-4, further including a main body (3) and a reaction cell (4), the reaction cell (4) being configured to accommodate a liquid to be measured, and the main body (3) having a chamber capable of accommodating the reaction cell (4); one end of the main body (3) has an opening for the reaction cell (4) to be loaded into the chamber; the transmitting module (9) and the receiving module (2) are disposed on opposite sides of the main body (3).

6. The analyzer according to claim 5, characterized in that, Further comprising: An upper connector (7), detachably mounted at one end of the main body (3); A lower connector (1), mounted at the bottom of the chamber; Both ends of the reaction cell (4) are snap-fitted and fixed to the upper connector (7) and the lower connector (1) respectively.

7. The analyzer according to claim 6, characterized in that, Further comprising: An upper pressing block (6) and a spring washer (8); The upper pressing block (6) is detachably installed at one end of the main body (3) and is located at one end of the upper joint (7) away from the reaction tank (4). The spring washer (8) is located between the upper pressing block (6) and the upper joint (7). The upper pressing block (6) can squeeze the upper joint (7) through the spring washer (8) so that the upper joint (7) clamps the reaction tank (4).

8. The analyzer according to any one of claims 5-7, characterized in that, It further includes a quartz glass (18), and the quartz glass (18) is installed between the chamber and the receiving module (2).

9. The analyzer according to any one of claims 5-7, characterized in that, The transmitting module (9) includes a light-emitting seat (15), and the lens (12) and the optical fiber joint (13) are installed on the light-emitting seat (15). The light-emitting seat (15) is connected to the side wall of the main body (3) through a fastener; The receiving module (2) includes a receiving seat (16) and an upper cover (17). The first filter (23), the first photoelectric sensor (21), the second filter (22) and the second photoelectric sensor (20) are installed on the receiving seat (16). The upper cover (17) covers one side of the receiving seat (16) to fix the first filter (23), the first photoelectric sensor (21), the second filter (22) and the second photoelectric sensor (20). The receiving seat (16) and the upper cover (17) are connected to the side wall of the main body (3) through fasteners.

10. The analyzer according to any one of claims 5-7, characterized in that, It further includes a heating wire (5), and the heating wire (5) is wound around the reaction tank (4) to be able to heat the reaction tank (4).

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