Ultraviolet light detection device

Abstract

The utility model relates to an ultraviolet light detection device which is characterized in that an ultraviolet light source emitting end is arranged at a light inlet end of an assembly bracket, a cuvette lower cover plate and a cuvette upper cover plate are arranged in the assembly bracket, a space is formed by the cuvette lower cover plate and the cuvette upper cover plate, and a dimmer fixing component and a cuvette sample pool are inserted into the space; the light emitting end of the assembly support is provided with a multiband optical filter switcher and a switcher pressing plate, the outer side of the switcher pressing plate is provided with a silicon photocell detection end, the silicon photocell detection end is in signal connection with an electric signal data acquisition device, and the ultraviolet light source transmitting end can transmit parallel ultraviolet light with three different wavelengths. Ultraviolet light sequentially passes through the dimmer fixing assembly, the cuvette sample pool and the multiband optical filter switcher and finally enters the silicon photocell detection end, and a sample concentration value reflected by the intensity of an optical signal is converted into an electric signal and is transmitted to the electric signal data acquisition device. According to the utility model, short-distance parallel light is adopted, the whole optical path range is small, and the working efficiency is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of ultraviolet light detection devices. BACKGROUND

[0002] The design basis of existing ultraviolet detection instrument: mainly based on the absorption law of light. That is, the light emitted by single wavelength (or multi-band) light source passes through a series of optical components, such as optical filter, sample cell, slit grating, etc. After that, the light will pass through the sample, and the intensity of the light will change with the concentration of the sample in the sample cell. The point or line formed by this change will be captured and recognized by the photoelectric detector as an electrical signal (i.e. current value). Different electrical signals are amplified by an amplifier and then converted into the required experimental data by a converter.

[0003] Insufficient analysis:

[0004] ① High material cost: existing ultraviolet detection equipment often needs to emit full-band light source, and after a series of reflection, filtering, refraction, etc. Specific wavelength range can be obtained; the overall design cost is high and the operation is more complex;

[0005] ② Large installation difficulty: before the equipment is debugged and shipped, the angle of the grating, the moving distance of the stepper motor and the precision of the processed parts, etc. need to be adjusted repeatedly. The overall debugging is complex and requires high experience of the installer;

[0006] ③ Difference in comparison: most existing devices use standard quartz cuvettes, and when adding a blank comparison, there is a difference between individual cuvettes, which cannot achieve true comparison;

[0007] ④ Environmental pollution: the sample waste after detection often needs to be collected manually for disposal, which is not only low in efficiency but also pollutes the environment. Utility model content

[0008] The utility model provides a kind of ultraviolet light detection device, simplifies the overall optical path design, makes its size smaller, and also removes multiple unnecessary links in the debugging process, reduces the possibility of failure;Design a new sample cuvette pool with washing function, through the steps of automatic sampling and automatic waste discharge, reduce manual operation and environmental pollution;Using the same cuvette also avoids the difference that may exist during comparison;Using fixed and stable light source output makes the information of emission end and receiving end unbiased, accurately reflects the related concentration value of sample;Adjust the current value to automatically switch several different light sources;At the same time, the filter of corresponding wavelength is automatically switched and matched, to ensure that different sample concentrations can be automatically detected under the same batch, saving manpower.

[0009] In order to achieve the above purpose, the utility model adopts the technical scheme of:

[0010] An ultraviolet light detection device is characterized in that: the light-in end of the assembly support is provided with an ultraviolet light source emitting end, a cuvette lower cover plate and a cuvette upper cover plate are arranged in the assembly support, the cuvette lower cover plate and the cuvette upper cover plate form a space, and a light reduction mirror fixing assembly and a cuvette sample pool are inserted into the space;

[0011] The light-out end of the assembly support is sequentially provided with a multi-band filter switcher and a switcher pressing plate, the outside of the switcher pressing plate is provided with a silicon photocell detection end, and the silicon photocell detection end is signal connected with a telecommunication signal data acquisition device.

[0012] The ultraviolet light source emitting end can emit three different wavelengths of parallel ultraviolet light, and the light passes through the light reduction mirror fixing assembly to reduce light intensity and light path reflection, the ultraviolet light with reduced light intensity sequentially passes through the cuvette sample pool and the multi-band filter switcher, the multi-band filter switcher filters out unnecessary stray light and light pollution, the filtered ultraviolet light enters the silicon photocell detection end, converts the sample concentration value reflected by the light signal intensity into an electrical signal, and transmits to the telecommunication signal data acquisition device.

[0013] The ultraviolet light detection device, wherein: the ultraviolet light source emitting end is provided with three wavelengths of LED light sources for emitting 380nm, 400nm and 420nm wavelength ultraviolet light.

[0014] The ultraviolet light detection device, wherein: a light coupling isolation circuit board and a small DC motor are arranged in the multi-band filter switcher, a main board is electrically connected with the light coupling isolation circuit board through a P23 interface, the light coupling isolation circuit board is electrically connected with the small DC motor, the small DC motor is connected with three filters through a lead screw, respectively 380nm filter, 400nm filter and 420nm filter, the main board outputs low level or high level to the light coupling isolation circuit board through the P23 interface, to control the conduction of the circuit of the light coupling isolation circuit board, the light coupling isolation circuit board controls the forward rotation or reverse rotation of the small DC motor through the conduction of the circuit, to control the left and right movement of the filters respectively, so that the filters match the wavelength of the ultraviolet light.

[0015] The ultraviolet light detection device, wherein: IO1, IO2, IO3, IO4, IO5 and IO6 circuits are arranged on the light coupling isolation circuit board respectively, the IO1 and the IO2 correspond to 13 and 15 pins of the P23 interface respectively, and also match the 380nm filter, the IO3 and the IO4 correspond to 17 and 19 pins of the P23 interface respectively, and also match the 400nm filter, the IO5 and the IO6 correspond to 21 and 23 pins of the P23 interface respectively, and also match the 420nm filter.

[0016] The ultraviolet light detection device, wherein: a waste pump valve is arranged in front of the assembly support, the waste pump valve is communicated with a liquid outlet of the cuvette sample pool, and the waste pump valve is used for controlling the discharge of waste liquid.

[0017] The utility model discloses the beneficial effects: simplify the whole optical path design, make its size smaller, and also remove multiple unnecessary links on the debugging process, reduce the possibility of failure, design the sample cuvette pool with the new flushing function, reduce manual operation and environmental pollution through the automatic sample feeding and automatic waste removal steps, use the same cuvette also avoid the difference that possibly exists when comparing, adopt fixed and stable light source output, make the information of emission end and receiving end without deviation, accurately reflect the relevant concentration value of sample, adjust the current value and make several different light sources automatic switching, and simultaneously corresponding wavelength filter automatic switching matching, ensure that different sample concentrations can be automatically completed detection under the same batch, save manpower. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a structure diagram of ultraviolet light detection device.

[0019] Fig. 2 It is an exploded view of ultraviolet light detection device.

[0020] Fig. 3 It is a working principle flow chart of ultraviolet light detection device.

[0021] Fig. 4 It is a structure diagram of optocoupler isolation circuit board.

[0022] BRIEF DESCRIPTION OF DRAWINGS: 1 - assembly support;2 - ultraviolet light source emission end;3 - light reduction mirror fixed component;4 - cuvette lower cover plate;5 - cuvette upper cover plate;6 - cuvette sample pool;7 - multi-band filter switcher;8 - switcher pressing plate;9 - silicon photocell detection end;10 - waste pump valve;11 - electric signal data acquisition device;12 - mainboard;13 - optocoupler isolation circuit board;14 - small DC motor. DETAILED DESCRIPTION

[0023] As Figs. 1 to 4 shown, an ultraviolet light detection device is characterized in that: the light inlet end of the assembly support 1 is provided with the ultraviolet light source emission end 2, the ultraviolet light source emission end 2 is provided with three kinds of wavelength LED light sources for emitting 380nm, 400nm and 420nm wavelength ultraviolet light, the assembly support 1 is provided with the cuvette lower cover plate 4 and the cuvette upper cover plate 5, the cuvette lower cover plate 4 and the cuvette upper cover plate 5 form a space, and the light reduction mirror fixed component 3 and the cuvette sample pool 6 are inserted.

[0024] The light emitting end of the assembly support 1 is provided with a multi-band filter switcher 7 and a switcher pressing plate 8 in sequence, the outer side of the switcher pressing plate 8 is provided with a silicon photocell detection end 9, the silicon photocell detection end 9 is signal connected with a telecommunication signal data acquisition device 11, the front of the assembly support 1 is provided with a waste pump valve 10, the waste pump valve 10 is communicated with the liquid outlet of the cuvette sample pool 6, for controlling the discharge of waste liquid.

[0025] The ultraviolet light source emitting end 2 can emit three different wavelengths of parallel ultraviolet light, and after passing through the dimming mirror fixing assembly 3, the light intensity and light path reflection are reduced, the ultraviolet light with reduced light intensity sequentially passes through the cuvette sample pool 6 and the multi-band filter switcher 7, the multi-band filter switcher 7 filters out unnecessary stray light and light pollution, the filtered ultraviolet light enters the silicon photocell detection end 9, converts the sample concentration value reflected by the light signal intensity into an electrical signal, and transmits to the telecommunication signal data acquisition device 11.

[0026] The multi-band filter switcher 7 is provided with an optocoupler isolation circuit board 13 and a small DC motor 14, the main board 12 is electrically connected with the optocoupler isolation circuit board 13 through a P23 interface, the optocoupler isolation circuit board 13 is electrically connected with the small DC motor 14, the small DC motor 14 is connected with three filters through a lead screw, the three filters are 380nm filter, 400nm filter and 420nm filter respectively, the main board 12 outputs low level or high level to the optocoupler isolation circuit board 13 through the P23 interface, for controlling the conduction of the circuit of the optocoupler isolation circuit board 13, the optocoupler isolation circuit board 13 controls the forward rotation or reverse rotation of the small DC motor 14 through the conduction of the circuit, for controlling the left and right movement of the filter respectively, for matching the wavelength of the filter with the ultraviolet light.

[0027] The optocoupler isolation circuit board 13 is respectively provided with IO1, IO2, IO3, IO4, IO5 and IO6 circuits, the IO1 and the IO2 respectively correspond to the 13 and 15 pins of the P23 interface, and also match the 380nm filter, the IO3 and the IO4 respectively correspond to the 17 and 19 pins of the P23 interface, and also match the 400nm filter, the IO5 and the IO6 respectively correspond to the 21 and 23 pins of the P23 interface, and also match the 420nm filter.

[0028] In the embodiment, the ultraviolet light source emitting end 2 emits ultraviolet light with a wavelength of 380 nm, the ultraviolet light enters the fixed light-reducing lens assembly 3, the light intensity is reduced and part of the light path is reflected, the ultraviolet light with reduced light intensity enters the cuvette sample pool 6, the light-coupling isolation circuit board 13 and the small DC motor 14 are arranged in the multi-band filter switch 7, the light-coupling isolation circuit board 13 receives the current output by the 13 and 15 pins of the mainboard 12 through the P23 interface, the 13 pin outputs a high level, and the 15 pin outputs a low level, the IO2 circuit on the light-coupling isolation circuit board 13 is turned on, the light-coupling isolation circuit board 13 controls the small DC motor 14 to reverse, and the 380 nm filter is moved to the left and taken out through the lead screw, the ultraviolet light passing through the cuvette sample pool 6 passes through the 380 nm filter, filters out unnecessary stray light and light pollution, and the filtered ultraviolet light enters the silicon photocell detection end 9, converts the sample concentration value reflected by the light signal intensity into an electric signal, and transmits to the electric signal data acquisition device 11.

[0029] After the electric signal data acquisition device 11 acquires the electric signal data, the ultraviolet light source emitting end 2 is turned off, the light-coupling isolation circuit board 13 receives the current output by the 13 and 15 pins of the mainboard 12 through the P23 interface, the 13 pin outputs a low level, and the 15 pin outputs a high level, the IO1 circuit on the light-coupling isolation circuit board 13 is turned on, the light-coupling isolation circuit board 13 controls the small DC motor 14 to rotate forward, and the 380 nm filter is moved to the right and taken back through the lead screw, and the liquid outlet of the cuvette sample pool 6 is communicated with the waste pump valve 10, so that the discharge of waste liquid can be controlled.

[0030] The process of controlling the 400 nm filter and the 420 nm filter by the light-coupling isolation circuit board 13 is the same as the process of controlling the 380 nm filter, and will not be described here again, IO3 and IO4 correspond to the 17 and 19 pins of the P23 interface respectively, and are also matched with the 400 nm filter, IO5 and IO6 correspond to the 21 and 23 pins of the P23 interface respectively, and are also matched with the 420 nm filter, the rotation or reversal of the small DC motor 14 is controlled, and then the taking back or taking out of different filters is controlled, that is, the left or right movement of the filter.

[0031] The above description is only illustrative but not restrictive for the utility model, and those skilled in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined by the claims, and all will fall within the protection scope of the utility model.

Claims

1. An ultraviolet light detection device, characterized by: The total assembly support (1) is provided with an ultraviolet light source emitting end (2) at the light inlet end, a cuvette lower cover plate (4) and a cuvette upper cover plate (5) are arranged in the total assembly support (1), the cuvette lower cover plate (4) and the cuvette upper cover plate (5) form a space, and a light reduction mirror fixing assembly (3) and a cuvette sample cell (6) are inserted into the space; A multi-band filter switcher (7) and a switcher pressing plate (8) are sequentially arranged at the light outlet end of the total assembly support (1), the outer side of the switcher pressing plate (8) is provided with a silicon photocell detection end (9), and the silicon photocell detection end (9) is signal connected with a telecommunication signal data acquisition device (11); The ultraviolet light source emitting end (2) can emit three different wavelengths of parallel ultraviolet light, and the light passes through the light reduction mirror fixing assembly (3) to reduce the light intensity and light path reflection, the ultraviolet light with reduced light intensity sequentially passes through the cuvette sample cell (6) and the multi-band filter switcher (7), the multi-band filter switcher (7) filters out unnecessary stray light and light pollution, the filtered ultraviolet light enters the silicon photocell detection end (9), converts the sample concentration value reflected by the light signal intensity into an electrical signal, and transmits to the telecommunication signal data acquisition device (11).

2. The ultraviolet light detection device of claim 1, wherein: The ultraviolet light source emitting end (2) is provided with three wavelengths of LED light sources for emitting 380nm, 400nm and 420nm wavelength ultraviolet light.

3. The ultraviolet light detection device of claim 1, wherein: A light coupling isolation circuit board (13) and a small DC motor (14) are arranged in the multi-band filter switcher (7), a main board (12) is electrically connected with the light coupling isolation circuit board (13) through a P23 interface, the light coupling isolation circuit board (13) is electrically connected with the small DC motor (14), the small DC motor (14) is connected with three filters through a lead screw, the three filters are 380nm filter, 400nm filter and 420nm filter respectively, the main board (12) outputs low level or high level to the light coupling isolation circuit board (13) through the P23 interface, so as to control the conduction of the circuit of the light coupling isolation circuit board (13), the light coupling isolation circuit board (13) controls the forward rotation or reverse rotation of the small DC motor (14) through the conduction of the circuit, so as to control the left and right movement of the filters respectively, so that the filters match the wavelength of the ultraviolet light.

4. An ultraviolet light detection device as defined in claim 3, wherein: IO1, IO2, IO3, IO4, IO5 and IO6 circuits are arranged on the light coupling isolation circuit board (13), the IO1 and the IO2 correspond to 13 and 15 pins of the P23 interface respectively, and also match the 380nm filter, the IO3 and the IO4 correspond to 17 and 19 pins of the P23 interface respectively, and also match the 400nm filter, the IO5 and the IO6 correspond to 21 and 23 pins of the P23 interface respectively, and also match the 420nm filter.

5. The ultraviolet light detection device of claim 1, wherein: A waste pump valve (10) is arranged at the front of the total assembly support (1), the waste pump valve (10) is communicated with a liquid outlet of the cuvette sample cell (6), so as to control the discharge of waste liquid.

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