Dual-wavelength LED ultraviolet detection device with reference
By introducing a reference dual-wavelength structure and sensor into the LED ultraviolet detector, the problems of single wavelength and low accuracy are solved, achieving high-precision multi-wavelength detection, reducing costs and expanding the scope of application.
Patent Information
- Application Number
- CN202423272328.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing LED ultraviolet detectors have a single wavelength, lack wavelength selection function, and have low detection accuracy.
A dual-wavelength LED ultraviolet detection device with reference is adopted, including a light source emitting mechanism and a transmission detection mechanism. It is equipped with a reference chamber and a transmission chamber, each equipped with an ultraviolet reference sensor and a transmission sensor of different wavelengths. Dual-wavelength detection is achieved through fiber optic connection, and the detection accuracy is improved by combining filters and collimating lenses.
It improves detection accuracy, enables simultaneous detection of absorbance at different wavelengths, reduces detector manufacturing costs, and allows for the configuration of different wavelength combinations to meet various needs, making it widely applicable.
Smart Images
Figure CN223727682U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the machine of strong ultraviolet absorption ability to the substance detection, especially a kind of double-wavelength LED ultraviolet detection device with reference, belong to visible spectrophotometer technical field. BACKGROUND
[0002] UV detector (UV detector) detects sample by measuring the intensity variation of ultraviolet light absorbed by substance. Among them, the basic composition of UV detector includes light source, spectroscope, sample cell and photodiode etc., the light source is the light source equipment generating ultraviolet, visible or near infrared light;Spectroscope disperses light into light of different wavelengths;Sample cell is the container in which sample is placed, and contains the detected substance. Most common organic substances and part of inorganic substances have ultraviolet absorption group, so they have strong ultraviolet absorption ability. Therefore, UV detector has high sensitivity and wide application range, and is the most widely used detector in liquid chromatography.
[0003] However, most of the existing LED ultraviolet detectors have single wavelength, lack wavelength selection function, and usually do not have reference sensor, resulting in low detection accuracy. Therefore, it is necessary to provide a double-wavelength LED ultraviolet detection device with reference to improve the performance of ultraviolet detection device. SUMMARY
[0004] The utility model discloses a kind of double-wavelength LED ultraviolet detection devices with reference to solve the above problems, to solve the problem of single wavelength of existing LED ultraviolet detector, lack wavelength selection function and low detection accuracy.
[0005] The technical solution of the utility model is: a double-wavelength LED ultraviolet detection device with reference, including light source emitting mechanism, flow cell and transmission detection mechanism, the light source emitting mechanism is connected with the flow cell by emitting optical fiber, the transmission detection mechanism is connected with the flow cell by bifurcated incident optical fiber, characterized by: the inside of the light source emitting mechanism is equipped with reference chamber, the reference chamber is symmetrically equipped with two ultraviolet reference sensors of different wavelengths, the bottom of the reference chamber is equipped with double-wavelength LED lamp, the vertical center of the reference chamber is equipped with light-emitting small hole, the light-emitting small hole is equipped with focusing lens, and the light-emitting small hole and the double-wavelength LED lamp are vertically arranged.
[0006] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0007] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0008] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0009] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0010] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0011] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0012] Further, the above-mentioned dual-wavelength LED ultraviolet detection device with reference, wherein: the first end of the outgoing optical fiber is connected with the light source emitting mechanism through the first optical fiber connector, and the second end of the outgoing optical fiber is connected with the flow cell through the second optical fiber connector.
[0013] Compared with the prior art, the dual-wavelength ultraviolet detection structure is adopted, and the reference sensor for detecting light source fluctuation is correspondingly arranged, the basic light intensity parameter is provided for the transmission end to improve the detection accuracy, different wavelength combinations can be pre-configured according to actual needs, the selectivity is strong, and the application range is wide. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0015] Figure 2 It is a front view of the utility model;
[0016] Figure 3 It is a structure schematic view of the light source emitting mechanism of the utility model;
[0017] Figure 4 It is the cross section schematic view of the light source emitting mechanism of the utility model;
[0018] Figure 5 It is the structure schematic view of the transmission detection mechanism of the utility model;
[0019] Figure 6 It is the cross section schematic view of the transmission detection mechanism of the utility model.
[0020] The meaning of each reference sign in the drawing is: 1-light source emitting mechanism, 11-reference chamber, 12-two wavelength LED lamp, 13-light hole, 14-reference filter, 15-ultraviolet reference sensor, 16-light hole, 17-focusing lens, 18-first optical fiber interface, 2-flow cell, 3-transmission detection mechanism, 31-upper shell, 32-lower shell, 33-fastener, 34-transmission sensor, 35-transmission filter, 36-collimating lens, 37-second optical fiber interface, 4-emission optical fiber, 41-first optical fiber connector, 42-second optical fiber connector, 5-bifurcated incident optical fiber, 51-third optical fiber connector, 52-fourth optical fiber connector. DETAILED DESCRIPTION
[0021] The technical scheme of the utility model is further explained below in combination with the drawings, so that it is easier to understand and master. The filter, focusing lens 17, collimating lens 36, optical fiber connector and flow cell 2 and other components involved are commonly used by ordinary skilled persons in the art and are not specially required in this case.
[0022] As shown in Figure 1 , Figure 2 The utility model provides a kind of reference two wavelength LED ultraviolet detection device with reference, including light source emitting mechanism 1, flow cell 2 and transmission detection mechanism 3, the light source emitting mechanism 1 is connected by emission optical fiber 4 between the flow cell 2, the first end of the emission optical fiber 4 is connected by first optical fiber connector 41 with light source emitting mechanism 1, the second end of the emission optical fiber 4 is connected by second optical fiber connector 42 with flow cell 2;The transmission detection mechanism 3 is connected by bifurcated incident optical fiber 5 between the flow cell 2, the unbranched end of the bifurcated incident optical fiber 5 is connected by third optical fiber connector 51 with flow cell 2, the bifurcated end of the bifurcated incident optical fiber 5 is connected by two fourth optical fiber connectors 52 with transmission detection mechanism 3.Using each optical fiber to equip the flow path connection mode of flow cell 2, make installation mode more flexible.
[0023] According to the technical scheme of the utility model, as Figure 3 And Figure 4As shown, the inside of the light source emitting mechanism 1 is provided with a reference chamber 11, the reference chamber 11 is provided with two ultraviolet reference sensors 15 of different wavelengths (respectively using 280nm ultraviolet reference sensor and 254nm ultraviolet reference sensor) symmetrically, both of the ultraviolet reference sensors 15 are connected with the light emitting hole 16 through the light transmission channel 13, the ultraviolet reference sensor 15 and the light transmission channel 13 are provided with a reference filter 14 (including 280nm wavelength reference filter and 254nm wavelength reference filter), the bottom of the reference chamber 11 is provided with a dual-wavelength LED lamp 12 (generating two different wavelengths of ultraviolet light at the same time, 280nm wavelength ultraviolet light and 254nm wavelength ultraviolet light), the vertical center of the reference chamber 11 is provided with a light emitting hole 16, the light emitting hole 16 is provided with a focusing lens 17, and the light emitting hole 16 is arranged in the upper and lower positions of the dual-wavelength LED lamp 12.
[0024] In addition, as shown in Figure 5 and Figure 6 As shown, the transmission detection mechanism 3 includes an upper housing 31 and a lower housing 32 arranged in position, the upper housing 31 and the lower housing 32 are fixedly connected through a plurality of fasteners 33 (i.e. the fastener 33 is a screw). The transmission chamber is formed between the two housings, the transmission chamber is provided with two transmission sensors 34 of different wavelengths (respectively using 280nm transmission sensor and 254nm transmission sensor) symmetrically, the transmission sensors 34 are sequentially provided with a transmission filter 35 (including 280nm wavelength transmission filter and 254nm wavelength transmission filter) and a collimating lens 36.
[0025] Preferably, in the above structure: the top of the light source emitting mechanism 1 is provided with a first optical fiber interface 18, and the first optical fiber interface 18 is adaptively connected with the first optical fiber connector 41. In order to transmit the light beam after the reference detection in the light source emitting mechanism 1 to the flow cell 2.
[0026] Preferably, in the above structure: the top of the transmission detection mechanism 3 is provided with two second optical fiber interfaces 37, and the two second optical fiber interfaces 37 are adaptively connected with the fourth optical fiber connector 52. In order for the transmission detection mechanism 3 to receive the light beam after the mixing treatment in the flow cell 2.
[0027] In the technical scheme of the utility model, the dual-wavelength LED lamp 12 of different wavelengths simultaneously detects the absorbance of different wavelengths, which is the technical key of the case, Figure 5 and Figure 6 The key parts related to the dual-wavelength detection of the light source emitting mechanism 1 and the transmission detection mechanism 3 are shown, Figure 5The light source emitting mechanism 1 is provided with a reference structure, and the detection accuracy is further improved by adding an ultraviolet reference sensor 15.
[0028] Therefore, the double-wavelength LED lamp 12 simultaneously generates two kinds of 280nm wavelength ultraviolet light and 254nm wavelength ultraviolet light, and the two kinds of ultraviolet light respectively enter the left and right sides of the reference chamber 11 through the light emitting hole 16 in the divergence angle of the double-wavelength LED lamp 12. In the reference chamber, the 280nm wavelength ultraviolet light and the 254nm wavelength ultraviolet light are filtered through respective light filters, so that the 280nm ultraviolet reference sensor only receives the 280nm wavelength ultraviolet light (that is, the 254nm wavelength ultraviolet light is filtered through a reference filter 14) for detection processing, and the 254nm ultraviolet reference sensor only receives the 254nm wavelength ultraviolet light (that is, the 280nm wavelength ultraviolet light is filtered through another reference filter 14) for detection processing. The two reference sensors detect the light source fluctuation to provide reference values for the transmission detection module at the rear end. At the first optical fiber interface 18, the mixed light is transmitted to the exit optical fiber 4 through the focusing lens 17, the exit optical fiber 4 transmits the mixed light to the inside of the flow cell 2, and after the mixed light is absorbed and attenuated by the solution, the mixed light is separated into two beams through the bifurcated incident optical fiber 5, and then the two beams are transmitted to the detection chamber with two different wavelengths in the transmission detection mechanism 3. The two different wavelengths are 280nm and 254nm. After the mixed light beams are collimated through the collimating lens 36, the 280nm transmission sensor only receives the 280nm wavelength ultraviolet light attenuated by the solution (that is, the 254nm wavelength ultraviolet light is filtered through a transmission filter 35), and the 254nm transmission sensor only receives the 254nm wavelength ultraviolet light attenuated by the solution (that is, the 280nm wavelength ultraviolet light is filtered through another transmission filter 35), so as to complete double-wavelength detection, and the ultraviolet absorbance can be calculated by using the parameters provided by the sensors.
[0029] Compared with the prior art, the ultraviolet LED lamp with double wavelengths is used to replace the expensive and short-life ultraviolet lamp such as deuterium lamp, so as to effectively reduce the manufacturing cost of the detector and prolong the maintenance period. The reference sensor is arranged to detect the fluctuation of the light source, provide the basic light intensity parameter for the transmission end, and improve the detection accuracy. The absorbance of different wavelengths can be detected at the same time. Moreover, the LED lamp and the light filters can be replaced, and different two-wavelength combinations can be preconfigured according to actual needs under the condition that the structure remains unchanged, so as to provide double-wavelength detectors with multiple specifications, and the selectivity is strong and the application range is wide.
[0030] The technical solutions, working process and implementation effects of the present application are described in detail above, and it should be noted that the description is only a typical example of the present application, and in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of the present application.
Claims
1. A reference dual-wavelength LED ultraviolet detection device, comprising a light source emitting mechanism (1), a flow cell (2) and a transmission detection mechanism (3), the light source emitting mechanism (1) and the flow cell (2) are connected through an exit optical fiber (4), the transmission detection mechanism (3) and the flow cell (2) are connected through a bifurcated incident optical fiber (5), characterized in that: The inside of the light source emitting mechanism (1) is provided with a reference chamber (11), the reference chamber (11) is provided with two ultraviolet reference sensors (15) of different wavelengths symmetrically left and right, the bottom of the reference chamber (11) is provided with a dual-wavelength LED lamp (12), the vertical center of the reference chamber (11) is provided with a light emitting small hole (16), the light emitting small hole (16) is provided with a focusing lens (17), and the light emitting small hole (16) is arranged in a one-to-one correspondence with the dual-wavelength LED lamp (12) vertically. 2. The dual-wavelength LED UV detection device with reference according to claim 1, characterized in that: The first end of the outgoing optical fiber (4) is connected in communication with the light source emitting mechanism (1) through a first optical fiber connector (41), and the second end of the outgoing optical fiber (4) is connected in communication with the flow cell (2) through a second optical fiber connector (42).
3. The dual-wavelength LED UV detection device with reference according to claim 2, characterized in that: The top of the light source emitting mechanism (1) is provided with a first optical fiber interface (18) for adapting to the first optical fiber connector (41).
4. The dual-wavelength LED UV detection device with reference according to claim 1, characterized in that: The non-forked end of the bifurcated incident optical fiber (5) is connected in communication with the flow cell (2) through a third optical fiber connector (51), and the forked end of the bifurcated incident optical fiber (5) is connected in communication with the transmission detection mechanism (3) through two fourth optical fiber connectors (52).
5. The dual-wavelength LED UV detection device with reference according to claim 4, characterized in that: The top of the transmission detection mechanism (3) is provided with two second optical fiber interfaces (37) for adapting to the fourth optical fiber connectors (52).
6. The dual-wavelength LED UV detection device with reference according to claim 1, characterized in that: Both of the ultraviolet reference sensors (15) are connected with the light emitting small hole (16) through a light transmission hole (13), and a reference filter (14) is arranged between the ultraviolet reference sensor (15) and the light transmission hole (13).
7. The dual-wavelength LED UV detection device with reference according to claim 1, characterized in that: The two transmission sensors (34) are sequentially provided with a transmission filter (35) and a collimating lens (36).
8. The dual-wavelength LED UV detection device with reference according to claim 1, characterized in that: The upper shell (31) and the lower shell (32) are fixedly connected through a plurality of fasteners (33), and the fasteners (33) are one of bolts, studs, screws, pins and rivets.