Miniature absorbed light detection device based on LED lamp

Abstract

The utility model provides a miniature absorbed light detection device based on an LED lamp, and the device comprises a housing which is provided with an installation cavity, the bottom of the housing is provided with M1 detection holes which are communicated with the installation cavity, and the M1 detection holes are used for cooperating with a photocell; the lofting table is arranged in the mounting cavity in a sliding manner, and the lofting table is provided with M2 lofting areas; the light source structure is suspended above the sample placing table, the light source structure comprises an LED circuit board, an optical filter and a limiting table which are sequentially connected in the vertical direction, the LED circuit board is provided with N LED lamp sets, each LED lamp set comprises M3 LED lamps, the limiting table is arranged in the mounting cavity in a sliding mode and provided with limiting holes, the number of the limiting holes is equal to that of the LED lamps, and the number of the limiting holes is equal to that of the LED lamps. And each limiting hole is covered by the optical filter. The technical problems that a traditional device is long in starting time, unstable and short in service life are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of light absorption detection, in particular to a miniature light absorption detection device based on an LED lamp. Background Art

[0002] The advantages of LED light sources are: high electro-optical conversion efficiency (nearly 60%), green and environmentally friendly, long life (up to 100,000 hours), low operating voltage (about 3V), repeated switching without loss of life, small size, low heat generation, high brightness, durability, easy dimming, various colors, concentrated and stable light beam, and no delay in startup.

[0003] Halogen lamps are typically used as light sources for absorption light detection devices. Light passes through the sample and enters a photocell detector, which converts the optical signal into an electrical signal for analysis. However, these devices have the following drawbacks: 1. Halogen lamps generate significant heat, requiring timely heat dissipation. 2. The light intensity of halogen lamps is unstable upon startup, requiring a warm-up period of approximately 1-2 minutes to reach optimal brightness. 3. Halogen lamps decay over time. 4. Halogen lamps have a relatively short lifespan of approximately 2,500 hours. 5. The optical path is complex, requiring a larger installation space. 6. Light intensity is uneven and varies significantly. Although this can be adjusted using an amplifier circuit, the detection results for each channel will vary. Utility Model Content

[0004] In view of the shortcomings in the existing technology, the utility model provides a miniature light absorption detection device based on LED lamps to solve the technical problems of long startup time, instability and short service life of traditional devices in related technologies.

[0005] The utility model provides a miniature light absorption detection device based on LED lamp, comprising:

[0006] The housing is formed with a mounting cavity, and the bottom of the housing is provided with M1 detection holes connected to the mounting cavity for cooperating with the photocell;

[0007] A sample setting table is slidably arranged in the mounting cavity, and the sample setting table is provided with M2 sample setting areas;

[0008] A light source structure is suspended above the sample preparation platform, the light source structure including an LED circuit board, a filter, and a limit platform connected in sequence in an up-down direction, the LED circuit board is provided with N groups of LED lamp groups, each group of the LED lamp group includes M3 LED lamps, the limit platform is slidably provided in the mounting cavity, and has limit holes equal to the number of the LED lamps, each of the limit holes is covered by the filter;

[0009] Among them, the sliding directions of the sample setting platform and the limit platform are parallel, so that when the sample setting platform and / or the limit platform slide, any one of the LED lights is connected with the corresponding limit hole, the sample setting area and the detection hole from top to bottom to form a detection channel.

[0010] Furthermore, the housing is provided with an escape opening for evading the photovoltaic cell.

[0011] Furthermore, the housing is provided with a lofting outlet, and the lofting outlet is located in the sliding direction of the lofting platform, so that when the lofting platform slides, the lofting outlet at least partially extends into or out of the mounting cavity through the lofting outlet.

[0012] Furthermore, the installation cavity is provided with a plurality of first sliding rods at intervals, and the lofting platform is slidably sleeved on the first sliding rods.

[0013] Furthermore, the installation cavity is provided with a plurality of second sliding rods at intervals, and the limiting platform is slidably sleeved on the second sliding rods.

[0014] Furthermore, the mounting cavity is provided with a matching gear and rack, the gear is driven by a motor provided on the housing, and the rack is connected to the limit platform.

[0015] Furthermore, M1=M2=M3, and M1>0.

[0016] Furthermore, the housing is detachably provided with a top cover for closing or opening the installation cavity.

[0017] Furthermore, a limiting plate is provided between the LED circuit board and the filter, and the limiting plate is detachably fixed to the limiting platform for pressing the filter therebetween.

[0018] Furthermore, the limiting plate is provided with a plurality of through holes for corresponding one-to-one with the LED lamps and the limiting holes.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the layout area formed on the layout table is used to place samples in enzyme-labeled strips, and the sliding of the layout table and / or the limit table can make the LED lamp, the limit hole, the layout area and the detection hole constitute a detection channel, so that the light generated by the LED lamp passes through the sample through the detection channel and enters the photocell, converts the light energy into electrical energy, and then displays it in the form of a picture or a number; the LED lamp is used as a light source for absorbing light, because it uses low voltage, the safety factor is higher, it is more energy-saving, the LED light is strong and not easy to attenuate, and it is more stable; at the same time, no preheating is required, the response time is short, no heat dissipation is required, and the service life is long; no optical fiber is used in the optical path, the optical path structure is simpler, the required space is smaller, and the cost can be reduced while reducing the error between channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the structure of a detection device in one embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the detection device in one embodiment of the present utility model with the top cover opened;

[0022] Figure 3 This is a partial exploded view of the detection device in one embodiment of the present utility model after omitting the outer shell;

[0023] Figure 4 This is a schematic structural diagram of an LED circuit board in one embodiment of the present invention;

[0024] Figure 5 Schematic diagram of the structure of the housing in one embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] 1. Housing; 101. Detection hole; 102. Avoidance opening; 103. Stakeout exit; 2. Stakeout platform; 201. Stakeout area; 3. LED circuit board; 4. LED light; 5. Filter; 6. Limit platform; 601. Limit hole; 7. Limit plate; 701. Via hole; 8. Photocell; 9. First slide bar; 10. Second slide bar; 11. Gear; 12. Rack; 13. Top cover.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and beneficial effects of the present invention more clearly understood, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the embodiment of the present utility model, Figure 1-Figure 5As shown, the miniature absorption light detection device based on LED lamp includes: a shell 1, a sample table 2 and a light source structure; the shell 1 is formed with a mounting cavity, and the bottom of the shell 1 is provided with M1 detection holes 101 connected to the mounting cavity, which are used to cooperate with the photocell 8; the sample table 2 is slidably arranged in the mounting cavity, and the sample table 2 is provided with M2 sample areas 201; the light source structure is suspended above the sample table 2, and the light source structure includes an LED circuit board 3, a filter 5 and a limit table 6 connected in sequence along the up and down directions, the LED circuit board 3 is provided with N groups of LED lamp groups, each group of the LED lamp group includes M3 LED lamps 4, the limit table 6 is slidably arranged in the mounting cavity, and has a limit hole 601 equal to the number of the LED lamp 4, and each of the limit holes 601 is covered by the filter 5;

[0030] In which, the sliding directions of the sample placement table 2 and the limit table 6 are parallel, so that when the sample placement table 2 and / or the limit table 6 slide, any one of the LED lights 4 is connected with the corresponding limit hole 601, the sample placement area 201 and the detection hole 101 from top to bottom to form a detection channel.

[0031] Specifically, in an embodiment of the present utility model, the housing 1 has an upwardly open mounting cavity for accommodating various components; a detection hole 101 is provided at the bottom of the housing 1, and the detection hole 101 can be communicated with the mounting cavity; the photocell 8 is fixed to the outer bottom of the housing 1 so that the above-mentioned detection hole 101 exposes a portion of the photocell 8, so that light can pass through the sample into the photocell 8, convert the light energy into electrical energy, and then display it in the form of a picture or number through a display device (not shown).

[0032] In an embodiment of the present utility model, the sample placement table 2 is provided with a sample placement area 201 for placing samples in enzyme-labeled strips; furthermore, in order to facilitate the taking and placing of samples in the sample placement area 201, the sample placement table 2 is slidably arranged in the mounting cavity. On the one hand, the sample can be taken and placed in the sample placement area 201 by controlling the sliding distance of the sample placement table 2, with a high degree of automation; on the other hand, the sample placement area 201 and the detection hole 101 can be spaced apart in the vertical direction, so that the projection of the sample placement area 201 can completely fall onto the photocell 8 through the detection hole 101, thereby improving the detection accuracy of the device.

[0033] In an embodiment of the present invention, a light source structure is suspended above the sample setting table 2 to provide light to the sample setting area 201; and the suspended setting method can prevent it from interfering with the sample setting table 2 during movement, and can leave enough space for the sample to be placed.

[0034] Specifically, the light source structure includes an LED circuit board 3, a filter 5 and a limiting platform 6 which are sequentially connected in the up and down directions.

[0035] like Figure 4 As shown, the LED circuit board 3 is used to install the LED lamp 4, so that the LED lamp 4 is used as a light source to replace the original halogen tungsten lamp to provide stable lighting according to the characteristics of the LED lamp 4 (the luminous efficiency decays to 50% of the initial value after 100,000 hours); it can use low voltage (generally adjusted between 2v-24v), and the safety factor is higher; the energy consumption of the LED lamp 4 can be reduced by 80% compared with the halogen tungsten lamp with the same luminous efficiency; the response time of the LED lamp 4 is nanoseconds, and the response time of the halogen tungsten lamp is milliseconds, and the response time is shorter; the LED lamp 4 can be used directly without preheating or heat dissipation; the LED lamp 4 has a long life of up to 100,000 hours; its optical path structure is simpler and requires smaller installation space; and the optical path structure does not use optical fiber, which reduces costs while also reducing errors between channels.

[0036] The limiting platform 6 is suspended above the sample setting platform 2 and forms a limiting hole 601 for cooperating with the aforementioned LED lamp 4. Simultaneously, each limiting hole 601 is covered with a filter 5. The filter 5 can filter the light source of the LED lamp 4 to form a fixed wavelength bandwidth, thereby preventing interference between the holes and reducing the wavelength bandwidth. Furthermore, the limiting platform 6 is slidably disposed within the mounting cavity, with its sliding direction parallel to the sliding direction of the sample setting platform 2. Thus, the LED lamp 4 and the limiting hole 601 at different positions can be moved above the sample setting area 201 by sliding the limiting platform 6. The LED lamp 4 serves as the light source, and the limiting hole 601, the sample setting area 201, and the detection hole 101 form a detection channel. Under the illumination provided by the LED lamp 4, the light can pass through the detection channel and enter the photocell 8 for detection. In other words, each detection channel is separated from each other and does not interfere with each other, reducing errors between the two during detection. Furthermore, by adjusting the number of detection channels, the device can simultaneously detect multiple channels, achieving high detection speed.

[0037] In this embodiment, the LED lamp 4 is used as a light source for absorbing light to replace the original halogen tungsten lamp, thereby shortening the detection time, optimizing the illumination and reducing the detection error.

[0038] like Figure 1 、 Figure 5 As shown, in one embodiment, the housing 1 is provided with an escape opening 102 for avoiding the photocell 8. Specifically, in order to install the photocell 8 on the outer bottom of the housing 1, this embodiment provides an escape opening 102 on the outer bottom of the housing 1. The opening of the escape opening 102 is set downward for installing the photocell 8 so that the photocell 8 can be partially exposed in the detection hole 101.

[0039] like Figure 1 、 Figure 2 、 Figure 5As shown, in one embodiment, the housing 1 is provided with a lofting outlet 103, and the lofting outlet 103 is located in the sliding direction of the lofting table 2, so that when the lofting table 2 slides, the lofting outlet 103 at least partially extends into or out of the mounting cavity. Specifically, in order to facilitate the removal and placement of samples located on the lofting table 2, this embodiment provides a lofting outlet 103 on the side of the housing 1, and the lofting outlet 103 is located in the sliding direction of the lofting table 2; in this way, when the lofting table 2 gradually slides in the direction of the lofting outlet 103, the lofting area 201 on the lofting table 2 can be gradually exposed to the outside of the housing 1 through the lofting outlet 103, making it easier to remove and place samples thereon; conversely, when the lofting table 2 gradually slides in the direction away from the lofting outlet, the lofting area 201 can gradually approach the limit table 6, so as to carry the sample to the corresponding channel for easy detection.

[0040] Preferably, the mounting cavity is provided with a plurality of first slide bars 9 at intervals, and the lofting platform 2 is slidably mounted on these first slide bars 9. The first slide bars 9 are arranged along the sliding direction of the lofting platform 2. When the lofting platform 2 is intermittently mounted on these first slide bars 9, the first slide bars 9 can serve as guides, facilitating the smooth reciprocating sliding of the lofting platform 2 along a predetermined path. Of course, to ensure balance between the upper and lower ends and / or left and right ends of the lofting platform 2 and prevent offset during sliding, the number of these first slide bars 9 can be selected based on actual installation needs and location.

[0041] Similarly, in order to guide the limit platform 6, the installation cavity in this embodiment is provided with a plurality of second slide rods 10 at intervals, and the limit platform 6 is slidably sleeved on the second slide rod 10 (since the functions of the first slide rod 9 and the second slide rod 10 are similar, the description of the second slide rod 10 is omitted here).

[0042] Furthermore, if Figure 5 As shown, in one embodiment, the mounting cavity is provided with a matching gear 11 and a rack 12, the gear 11 is driven by a motor provided on the housing 1, and the rack 12 is connected to the limit platform 6. Specifically, in order to drive the limit platform 6 to slide back and forth along the axial direction of the second slide bar 10, this embodiment sets a matching gear 11 and a rack 12 in the mounting cavity, the gear 11 rotates and extends into the mounting cavity, and is driven by a motor (not shown) provided outside the housing 1, and the rack 12 is provided at the limit platform 6. The motor drives the gear 11 to rotate, thereby causing the gear 11 to slide in conjunction with the rack 12, and then the limit platform 6 can slide back and forth along with the rack 12. Of course, the driving method of the layout table 2 can also refer to the driving method of the above-mentioned gear and rack, or adopt the matching method of the screw rod and the slide seat, which is not limited here.

[0043] like Figure 3As shown, in one embodiment, M1 = M2 = M3, and M1 > 0, so that each LED lamp 4, each limiting hole 601, each layout area 201, and each detection hole 101 corresponds to each other, forming separate channels without interfering with each other; and multiple channels can be tested simultaneously to improve detection efficiency. In this embodiment, M1 = 8, N = 6, and there are 6 filters 5.

[0044] like Figure 1 、 Figure 2 As shown, in one embodiment, the housing 1 is provided with a detachable top cover 13 for sealing or opening the mounting cavity. Specifically, to integrate the device and protect the mounting cavity from dust, the housing 1 is provided with a detachable top cover 13 in this embodiment. The top cover 13 can seal or open the mounting cavity, which also facilitates installation and maintenance of the device.

[0045] like Figure 3 As shown, in one embodiment, a stop plate 7 is provided between the LED circuit board 3 and the filter 5. The stop plate 7 is detachably fixed to the stop platform 6 and is used to compress the filter 5 therebetween. To limit the filter 5 at the stop hole 601, this embodiment provides a stop plate 7 between the LED circuit board 3 and the filter 5. The stop plate 7 is fixed to the stop platform 6 by fixing screws, thereby compressing the filter 5 between the stop plate 7 and the stop platform 6, thereby positioning and fixing the filter 5. Of course, in order to allow the LED circuit board 3 to move with the stop platform 6, a through hole is provided in the LED circuit board 3 for the fixing bolts to pass through and be fixed to the stop platform 6, so that the LED circuit board 3, the stop plate 7, the filter 5, and the stop platform 6 form a whole and can move back and forth together. Preferably, the stop plate 7 has multiple through holes 701, which are used to correspond one-to-one with the LED lamp 4 and the stop hole 601 to avoid blocking the LED lamp 4.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A miniature light absorption detection device based on LED lamp, characterized in that: include: The housing is formed with a mounting cavity, and the bottom of the housing is provided with M1 detection holes connected to the mounting cavity for cooperating with the photocell; A sample setting table is slidably arranged in the mounting cavity, and the sample setting table is provided with M2 sample setting areas; A light source structure is suspended above the sample preparation platform, the light source structure including an LED circuit board, a filter, and a limit platform connected in sequence in an up-down direction, the LED circuit board is provided with N groups of LED lamp groups, each group of the LED lamp group includes M3 LED lamps, the limit platform is slidably provided in the mounting cavity, and has limit holes equal to the number of the LED lamps, each of the limit holes is covered by the filter; Among them, the sliding directions of the sample setting platform and the limit platform are parallel, so that when the sample setting platform and / or the limit platform slide, any one of the LED lights is connected with the corresponding limit hole, the sample setting area and the detection hole from top to bottom to form a detection channel.

2. A miniature light absorption detection device based on an LED lamp as claimed in claim 1, characterized in that: The housing is provided with an escape opening for evading the photovoltaic cell.

3. The miniature light absorption detection device based on LED lamp as claimed in claim 1, characterized in that: The housing is provided with a lofting outlet, and the lofting outlet is located in the sliding direction of the lofting platform, so that when the lofting platform slides, the lofting outlet at least partially extends into or out of the installation cavity.

4. The LED-based micro light absorption detection device according to claim 1, wherein: The installation cavity is provided with a plurality of first sliding rods at intervals, and the lofting platform is slidably sleeved on the first sliding rods.

5. The LED-based micro light absorption detection device according to claim 1, wherein: The installation cavity is provided with a plurality of second sliding rods at intervals, and the limiting platform is slidably sleeved on the second sliding rods.

6. A miniature light absorption detection device based on an LED lamp as claimed in claim 5, characterized in that: The mounting cavity is provided with a matching gear and rack, the gear is driven by a motor provided on the housing, and the rack is connected to the limiting platform.

7. A miniature light absorption detection device based on an LED lamp according to any one of claims 1 to 6, characterized in that: M1=M2=M3, and M1>0.

8. A miniature light absorption detection device based on an LED lamp according to any one of claims 1 to 6, characterized in that: The housing is detachably provided with a top cover for closing or opening the installation cavity.

9. The LED-based micro light absorption detection device according to claim 1, wherein: A limiting plate is provided between the LED circuit board and the filter. The limiting plate is detachably fixed to the limiting platform and is used to compress the filter therebetween.

10. The LED-based micro light absorption detection device according to claim 9, characterized in that: The limiting plate is provided with a plurality of through holes for corresponding one-to-one with the LED lamps and the limiting holes.

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