Laser equipment for detecting marine pollutants

Abstract

The utility model relates to the field of marine pollution monitoring equipment, in particular to laser equipment for detecting marine pollutants, which comprises a laser transmitter, a reflecting mirror, a sample pool, a light filtering device, a spectrograph and a central computer, the reflecting mirror is supported and fixed through a supporting vertical frame, the supporting vertical frame comprises a supporting base, a supporting rod fixedly arranged on the supporting base and a rotating device movably arranged at the tail end of the free end of the supporting rod, the reflecting mirror is fixedly arranged on the rotating device, and the light filtering device comprises a light filter and a probe. The laser is emitted into the sample pool through the reflector, is reflected to the light filtering device, is transmitted into the spectrometer through the optical fiber, and is further transmitted to the central computer for spectral analysis, so that the technical problem of laser deflection caused by deflection of the reflector in the process of detecting the marine pollutants by adopting the laser in the market in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of marine pollution monitoring equipment especially relates to a laser equipment for detecting marine pollutant. BACKGROUND

[0002] Laser-induced fluorescence is a kind of spectral method by absorbing laser to excite atom or molecule to higher energy level, then spontaneous luminescence. The technology has the advantages of fast, high precision, high sensitivity, nondestructive testing, and is widely used in medicine, environment, biology, chemical industry, food and other fields.

[0003] The laser-induced fluorescence technology is applied in marine pollutant detection, can be combined with algorithm, because laser-induced fluorescence detects the luminescence of different direction and different wavelength with strong directionality and monochromaticity of excitation light, therefore, compared with other laser spectroscopy, the sensitivity is high. It can detect less than 100 atoms / cm3. For most molecules, it can be easily detected to 106 / cm3. By laser frequency modulation, the initial state and final state of excitation transition can be selected, so the very complex spectral band of molecule can be analyzed.

[0004] The invention patent with the Chinese patent application number 201410344857.5 discloses a detection method for marine bacteria in-situ abundance and diversity based on laser-induced fluorescence, which has wide application range, rapid and simple analysis and is beneficial to environmental protection. The technical scheme is: characterized in that it comprises the following steps: (1) the measured water sample solution is delivered by a pump; (2) the water sample solution flows through a filter column; (3) the water sample after flowing through the filter column enters a fluorescence cell; (4) a high-frequency pulsed excitation light source, a deep ultraviolet laser diode pumped solid laser, is used to generate a continuous wave band light source, which irradiates the fluorescence cell, and a spectral dispersion device, a grating, is used for spatial dispersion, and after dispersion, a spectral band of λ1-λ2 is formed; (5) a CCD photoelectric detector located at the detection window simultaneously collects spectral data of λ1-λ2, and wavelength-intensity two-dimensional spectrum is obtained through internal conversion and time sequence integration; (6) a data processing system calculates and analyzes marine bacteria abundance and diversity through marine bacteria fluorescence identification mode. The technical scheme content of the above-mentioned invention uses laser-induced fluorescence to analyze marine bacteria abundance and diversity, but in the actual application process, the reflecting mirror in the equipment is easy to shake because the stable operation is not done well, and then the laser emitted by the laser emitter is deflected, which affects the experiment. UTILITY MODEL CONTENT

[0005] Therefore, in order to solve the above technical problems, the utility model provides a laser equipment for detecting marine pollutant, which solves the technical problem that the laser deflects due to the deflection of the reflecting mirror in the process of detecting marine pollutants by using laser on the market.

[0006] To achieve the above object, the utility model discloses the following technical scheme: a kind of laser equipment for detecting marine pollutant, including laser emitter, reflector, sample cell, optical filter device, spectrometer and central computer, the laser emitter is used to emit 405 nanometer laser, the reflector is arranged between the laser emitter and the sample cell, the reflector is supported and fixed by support stand, the support stand includes support base, support rod fixedly arranged on the support base, rotating device movably arranged at the free end of the support rod, the reflector is fixedly arranged on the rotating device, the rotating device is rotated to drive the reflector to rotate, the optical filter device includes optical filter and probe, laser is reflected to optical filter device after being shot into sample cell by reflector, then is transmitted to spectrometer in optical fiber, and then transmitted to central computer to carry out spectral analysis.

[0007] Further, the rotating device includes a first rotating disc, a second rotating disc and a connecting pin, the first rotating disc is fixedly connected with the support rod, the reflector is fixedly arranged on the second rotating disc, and the first rotating disc and the second rotating disc are movably connected by the connecting pin.

[0008] Further, the second rotating disc is coaxially arranged with the first rotating disc, and the second rotating disc rotates on the first rotating disc along the central axis of the two.

[0009] Further, the connecting pin is an elastic pin, which includes a pin rod and an extension spring, one end of the pin rod is fixedly connected with the first rotating disc, and the other end is movably connected with the second rotating disc.

[0010] Further, a rotating positioning mechanism is arranged between the first rotating disc and the second rotating disc, the rotating positioning mechanism includes a plurality of positioning grooves arranged on the first rotating disc and a plurality of positioning protrusions arranged on the second rotating disc, and the positioning grooves and the positioning protrusions are matched with each other.

[0011] Further, the number of the positioning grooves is the same as that of the positioning protrusions.

[0012] By adopting the foregoing technical scheme, the utility model has the beneficial effects that:

[0013] The utility model improves the equipment structure, so that the reflector can be angle-adjusted as needed, and the angle can be kept constant after adjustment, which ensures that the laser emitted by the laser emitter can be accurately shot into the sample cell to detect the sample in the sample cell, and the experimental precision is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] Other features, objects, and advantages of the application will become more apparent by reading the following non-restrictive embodiment with reference to the accompanying drawings:

[0015] Figure 1 is a component connection diagram of the utility model;

[0016] Figure 2 is a support stand structure schematic view of the utility model;

[0017] Figure 3 is a rotating device internal structure sectional view of the utility model;

[0018] Figure 4 is a rotating positioning mechanism distribution schematic view of the utility model. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0020] Please refer to Figures 1-4 The utility model provides a kind of laser equipment for detecting marine pollutant, including laser emitter, reflector 4, sample cell, optical filter device, spectrometer and central computer, the laser emitter is used to emit 405 nanometer laser, the reflector 4 is arranged between the laser emitter and the sample cell, the reflector 4 is supported and fixed by support stand, the support stand includes support base 1, support rod 2 fixedly arranged on the support base 1, rotating device 3 movably arranged on the free end of the support rod 2, the reflector 4 is fixedly arranged on the rotating device 3, rotating device 3 is driven to rotate by the rotation of the reflector 4, the optical filter device includes optical filter and probe, laser is reflected to optical filter device after being injected into sample cell by reflector 4, then is transmitted to spectrometer by optical fiber, and then is transmitted to central computer to carry out spectral analysis;

[0021] Among them, about laser emitter, reflector 32, sample cell, optical filter device, spectrometer and central computer are all known equipment and structural parts in the art, not more detailed here.

[0022] The rotating device 3 comprises a first rotating disc 31, a second rotating disc 32 and a connecting pin 33, the first rotating disc 31 is fixedly connected with the support rod 2, the reflecting mirror 4 is fixedly arranged on the second rotating disc 32, the first rotating disc 31 and the second rotating disc 32 are movably connected through the connecting pin 33, the second rotating disc 32 is coaxially arranged with the first rotating disc 31, the second rotating disc 32 rotates on the first rotating disc 31 along the central axis of the two, the connecting pin 33 is an elastic pin, which comprises a pin rod 331 and an extension spring 332, one end of the pin rod 331 is fixedly connected with the first rotating disc 31, and the other end is movably connected with the second rotating disc 32.

[0023] A rotating positioning mechanism 5 is arranged between the first rotating disc 31 and the second rotating disc 32, the rotating positioning mechanism 5 comprises a plurality of positioning grooves 51 arranged on the first rotating disc 31 and a plurality of positioning protrusions 52 arranged on the second rotating disc 32, the positioning grooves 51 and the positioning protrusions 52 are matched with each other, the number of the positioning grooves 51 and the positioning protrusions 52 is the same, and in this embodiment, the number is 8.

[0024] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, for those skilled in the art, obviously, the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0025] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

Claims

1. A laser apparatus for detecting marine pollutants, characterized by: The application relates to a laser spectrometer, which comprises a laser emitter, a mirror, a sample cell, a filter device, a spectrometer and a central computer, wherein the laser emitter is used for emitting laser beams of 405 nm, the mirror is arranged between the laser emitter and the sample cell, the mirror is supported and fixed by a supporting stand, the supporting stand comprises a supporting base, a supporting rod fixedly arranged on the supporting base and a rotating device movably arranged on the free end of the supporting rod, the mirror is fixedly arranged on the rotating device, the rotating device drives the mirror to rotate by rotating, the filter device comprises a filter and a probe, laser beams are reflected to the filter device after being reflected to the sample cell by the mirror, then the laser beams are transmitted to the spectrometer through optical fibers, and then the laser beams are transmitted to the central computer for spectral analysis.

2. A laser device for detecting marine pollutants according to claim 1, characterized in that: The rotating device comprises a first rotating disc, a second rotating disc and a connecting pin, the first rotating disc is fixedly connected with the supporting rod, the mirror is fixedly arranged on the second rotating disc, and the first rotating disc and the second rotating disc are movably connected through the connecting pin.

3. A laser device for detecting marine pollutants according to claim 2, characterised in that: The second rotating disc is coaxially arranged with the first rotating disc, and the second rotating disc rotates on the first rotating disc along the central axis of the two.

4. A laser apparatus for detecting marine pollutants according to claim 3, wherein: The connecting pin is an elastic pin, which comprises a pin rod and an elastic spring, one end of the pin rod is fixedly connected with the first rotating disc, and the other end is movably connected with the second rotating disc.

5. A laser apparatus for detecting marine pollutants as claimed in claim 4, wherein: A rotating positioning mechanism is arranged between the first rotating disc and the second rotating disc, the rotating positioning mechanism comprises a plurality of positioning grooves arranged on the first rotating disc and a plurality of positioning protrusions arranged on the second rotating disc, and the positioning grooves and the positioning protrusions are matched with each other.

6. A laser apparatus for detecting marine pollutants as claimed in claim 5, wherein: The number of the positioning grooves is the same as that of the positioning protrusions.

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