Multi-channel parallel transmittance detector and assembling method thereof

Abstract

The invention belongs to the field of optical detection instruments, and particularly discloses a multi-channel parallel transmittance detector which comprises a shell, a mainboard is arranged in the shell, a detection port penetrating through the mainboard is formed in the edge of the shell, and a transmitting assembly located in the shell is arranged on one side of the detection port; the other opposite side of the detection port is provided with a receiving assembly arranged in the shell, and at least two transmitting assemblies are sequentially arranged at intervals; the number of the receiving assemblies is equal to that of the transmitting assemblies, the receiving assemblies and the transmitting assemblies are in one-to-one correspondence, the silicon photocells are connected with the main board, and the silicon photocells, the incident light convex lens, the detection port, the emergent light convex lens and the first light-emitting part are sequentially arranged to form a single detection light path; the invention further discloses an assembling method of the multi-channel parallel transmittance detector. The multi-channel parallel transmittance detector comprises the transmittance detector. According to the scheme, multiple light sources of the transmittance detector can simultaneously penetrate through a detected object in a mutually independent and non-interfering manner, and are independently received by an electronic device to complete detection.

Description

Technical Field

[0001] This invention relates to the field of optical testing instruments, and in particular to a multi-channel parallel transmittance detector and its assembly method. Background Technology

[0002] A transmittance meter is a professional-grade optical testing instrument widely used in packaging materials, optical components, and automotive manufacturing. Transmittance meters are primarily used to test light transmittance and material barrier properties, such as the light transmittance of transparent / semi-transparent materials or the barrier properties of gases / water vapor.

[0003] Existing transmittance detectors mostly employ a single-channel detection structure. The specific detection method of a single-channel structure involves switching between multiple light sources one by one during the detection process, allowing light from different sources to pass through the channel sequentially and strike the object being tested. After the light penetrates the object, it is received by electronic components and converted into electrical signals, which are then processed by the mainboard to obtain the transmittance data for the corresponding light source. Because switching between multiple light sources is required one by one, the transmittance detector needs to incorporate motion mechanisms, positioning structures, and drive mechanisms to dynamically switch between multiple light sources, or it needs to have multiple independent detection optical paths for each light source to propagate independently and sequentially, thus statically switching between multiple light sources. Both dynamic and static switching of multiple light sources result in a complex instrument structure, high failure rate, and low detection efficiency, and are also prone to accuracy degradation due to mechanical wear. Furthermore, the method of switching between multiple light sources one by one leads to long detection times and low efficiency, making it difficult to meet the needs of rapid detection of large batches of samples. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-channel parallel transmittance detector and its assembly method, which enables multiple light sources of the transmittance detector to penetrate the object under test simultaneously in an independent and non-interfering manner, and each light source is independently received by electronic devices to complete the detection. This avoids the mechanical wear caused by dynamically switching multiple light sources and the complex detection optical path design required for static switching, thereby reducing the size of the instrument and the detection time, while reducing the failure rate, improving the detection accuracy and increasing the detection efficiency.

[0005] The technical solution provided by the present invention is as follows: a multi-channel parallel transmittance detector, including a housing, a main board for outputting detection information is provided inside the housing, a detection port penetrating the main board is opened at the edge of the housing, and an emitting component located inside the housing is provided on one side of the detection port. The emitting component includes a threaded channel communicating with the detection port, a first light-emitting element and a light-emitting convex lens, both disposed in the threaded channel and spaced apart from each other, and the first light-emitting element is connected to the main board; On the opposite side of the detection port, there is a receiving component inside the housing. The receiving component includes a detection channel that communicates with the detection port and faces the threaded channel, a silicon photocell and an incident light convex lens that are all disposed in the detection channel and spaced apart from each other. The silicon photocell is connected to the motherboard. The silicon photocell, the incident light convex lens, the detection port, the exit light convex lens and the first light-emitting element are arranged in sequence. The transmitting component is provided in at least two parts, and is arranged in sequence with intervals; the number of receiving components is equal to the number of transmitting components, and each receiving component corresponds to each transmitting component.

[0006] In the aforementioned multi-channel parallel transmittance detector, each of the threaded channels is provided with a light-emitting aperture. The light-emitting aperture is located on the output side of the first light-emitting element and is spaced apart from the light-emitting convex lens. The opening of the light-emitting aperture faces the first light-emitting element.

[0007] In the aforementioned multi-channel parallel transmittance detector, the receiving component further includes a first filter disposed within the detection channel, the first filter being disposed between the incident convex lens and the silicon photovoltaic cell.

[0008] In the aforementioned multi-channel parallel transmittance detector, each detection channel is equipped with an incident light aperture, which is located on the receiving side of the silicon photovoltaic cell and spaced apart from the incident light convex lens; the opening of the incident light aperture faces the silicon photovoltaic cell.

[0009] In the aforementioned multi-channel parallel transmittance detector, a second light-emitting element is provided on one side of the detection port, spaced apart from the emitting component; a receiving module is provided on the opposite side of the detection port, spaced apart from the receiving component. The receiving module includes a second filter and a receiving sensor. The second filter is located between the receiving sensor and the detection port, and is directly opposite the second light-emitting element. Both the second light-emitting element and the receiving sensor are connected to the motherboard.

[0010] In the aforementioned multi-channel parallel transmittance detector, the second light-emitting element and the receiving module are both housed inside the housing. Through holes are provided on both sides of the detection port, and the two through holes are respectively directly opposite the second light-emitting element and the receiving module.

[0011] In the aforementioned multi-channel parallel transmittance detector, both the transmitting component and the receiving component are located on the first side of the motherboard, and a display screen is located on the second side of the motherboard. The first and second sides of the motherboard are opposite sides of the motherboard, and a display window facing the display screen is provided on the outer casing. A cable port is provided at the edge of the motherboard, and a ribbon cable and a power supply cable are provided on the display screen. Both the ribbon cable and the power supply cable are located in the cable port and are connected to the first side of the motherboard.

[0012] In the aforementioned multi-channel parallel transmittance detector, a connector is provided on a pair of opposite corners of the display screen. The connector is snapped into the display screen and is detachably connected to the second side of the motherboard.

[0013] In the aforementioned multi-channel parallel transmittance detector, the outer casing includes two end plates, a sealing plate, and a hollow shell. The inner cavity of the shell extends through both opposite ends of the shell. The inner wall of the shell is provided with slots, both ends of which are open and directly opposite the opposite ends of the shell. There are two slots, and the main board is secured between the two slots. The two end plates correspond to and are connected to the opposite ends of the shell. The detection port is located at the edge of the housing, penetrates the housing, and communicates with the inner cavity of the housing; the sealing plate matches the contour of the detection port, the housing has a top rod facing the center of the detection port, the center of the sealing plate is connected to the top rod, and the opposite sides of the sealing plate are respectively connected to the inner wall of the housing.

[0014] The assembly method for a multi-channel parallel transmittance meter includes the multi-channel parallel transmittance meter as described above, and further includes the following installation steps: Insert the motherboard into the two slots from one end of the housing, and push the motherboard along the slots until the detection notch on the motherboard is aligned with the detection port; The push rod is pressed between the opposite side walls of the housing from the detection port, the middle part of the sealing plate is connected to the push rod, and the opposite sides of the sealing plate are respectively connected to the inner wall of the housing; The two pieces are respectively connected to the inner walls of the corresponding ends of the housing.

[0015] The beneficial effects of this invention after adopting the above technical solution are as follows: In this technical solution, each threaded channel and its corresponding detection channel together form a single detection optical path. In this single detection optical path, the first light-emitting element within the threaded channel emits light. The light propagates within the threaded channel, and stray light is eliminated by the inner wall of the threaded channel. The light then passes through an exiting convex lens into the detection port area. After passing through the exiting convex lens, the light is focused and projects onto the object being measured. With the assistance of the exiting convex lens, the light is prevented from scattering in all directions within the detection port area, thus avoiding interference with adjacent detection optical paths and reducing light intensity attenuation. This concentrates the light onto the object being measured, enhancing the light intensity as it penetrates the object, thereby improving detection effect and quality. After penetrating the object being measured, the light propagates within the detection channel via an entrance convex lens and is finally received by a silicon photodiode within the detection channel. The silicon photodiode converts the received light signal into an electrical signal and outputs it to the motherboard. During propagation, the entrance convex lens provides the focal point for focusing the light onto the silicon photodiode, while the detection channel provides the propagation distance required for focusing the light. Based on the principle that a single detection optical path will not diverge in all directions within the detection port area, multiple detection optical paths are arranged in an array on the same plane. Each first light-emitting element is matched with a corresponding silicon photodiode, so that each detection optical path can coexist independently and without interference within the detection port area. When the object to be tested is placed in the detection port, multiple detection optical paths can penetrate the object simultaneously. This allows multiple light sources of the transmittance detector to penetrate the object simultaneously in an independent and non-interfering manner, and each light source is independently received by the electronic device to complete the detection. This avoids the mechanical wear caused by dynamically switching multiple light sources and the complex detection optical path design required for static switching, thereby reducing the instrument size and detection time, while reducing the failure rate, improving detection accuracy, and increasing detection efficiency. Attached Figure Description

[0016] Figure 1 This is a right-tilted structural diagram of a multi-channel parallel transmittance detector according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the left-tilted structure of a multi-channel parallel transmittance detector according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of a multi-channel parallel transmittance detector according to an embodiment of the present invention; Figure 4 This is a schematic diagram showing the front view, left view, right view and top view of a multi-channel parallel transmittance detector according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the assembly of the housing and the motherboard according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the assembly of the motherboard and the display screen according to an embodiment of the present invention.

[0017] Reference numerals: 1. Housing; 2. Receiver assembly; 3. Transmitter assembly; 4. Second light-emitting element; 5. Main board; 6. Receiver module; 7. Display screen; 8. Connector; 11. Support foot; 12. End plate; 121. Adjustment knob; 122. Socket; 123. Switching power supply; 13. Housing; 14. Detection port; 15. Through hole; 16. Sealing plate; 17. Display window; 18. Protective panel; 19. Top rod; 10. Slot; 21. Detection channel; 22. Entrance lens; 23. Entrance aperture; 24. First filter; 25. Silicon photovoltaic cell; 26. Receiver base; 31. Emerging convex lens; 32. Threaded channel; 33. Emitter; 34. First light-emitting element; 35. Emerging aperture; 51. Installation notch; 52. Cable entry point; 53. First side; 54. Inspection notch; 55. Second side; 71. Cabinet; 72. Power supply line. Detailed Implementation

[0018] The technical solution of the present invention will be further described in detail below with reference to specific embodiments, but this does not constitute any limitation on the present invention.

[0019] Example: like Figures 1-6 As shown, this embodiment provides a multi-channel parallel transmittance detector, including a housing 1. The housing 1 is provided with a main board 5 for outputting detection information. A detection port 14 penetrating the main board 5 is opened at the edge of the housing 1. An emission component 3 located inside the housing 1 is provided on one side of the detection port 14. The emission component 3 includes a threaded channel 32 communicating with the detection port 14, a first light-emitting element 34 disposed in the threaded channel 32 and spaced apart from each other, and a light-emitting convex lens 31. The first light-emitting element 34 is connected to the main board 5. On the opposite side of the detection port 14, there is a receiving component 2 located inside the housing 1. The receiving component 2 includes a detection channel 21 that communicates with the detection port 14 and faces the threaded channel 32, silicon photocells 25 that are all located in the detection channel 21 and spaced apart from each other, and an incident light convex lens 22. The silicon photocells 25 are connected to the main board 5. The silicon photocells 25, the incident light convex lens 22, the detection port 14, the light emitting convex lens 31, and the first light-emitting element 34 are arranged in sequence. There are at least two transmitting components 3, which are arranged in sequence at intervals; the number of receiving components 2 is equal to the number of transmitting components 3, and each receiving component 2 corresponds to each transmitting component 3.

[0020] The specific working principle is as follows: In this technical solution, each threaded channel 32 and the corresponding detection channel 21 together form a complete single detection optical path. In this single detection optical path, the first light-emitting element 34 in the threaded channel 32 emits light. The light propagates within the threaded channel 32, and stray light in the light is eliminated by the inner threaded wall of the threaded channel 32. The light then passes through the light-emitting convex lens 31 into the area of ​​the detection port 14. After passing through the light-emitting convex lens 31, the light is focused inward and strikes the object being measured. With the assistance of the light-emitting convex lens 31, the light is prevented from scattering in all directions within the detection port 14, thereby avoiding interference with adjacent detection optical paths. At the same time, it reduces light intensity attenuation, allowing the light to be concentrated and projected onto the object being measured, enhancing the light intensity when penetrating the object, thus improving the detection effect and quality. After light penetrates the object being measured, it propagates through the incident lens 22 within the detection channel 21 and is finally received by the silicon photodiode 25 within the detection channel 21. The silicon photodiode 25 converts the received light signal into an electrical signal and outputs it to the motherboard 5. During the propagation of the light, the incident lens 22 provides the focal point for focusing the light onto the silicon photodiode 25, while the detection channel 21 provides the propagation distance required for focusing the light. Since a single detection optical path will not diverge in all directions within the detection port 14, multiple detection optical paths are arranged in an array on the same plane. Each first light-emitting element 34 is matched with the corresponding silicon photodiode 25 for operation, so that each detection optical path can coexist independently and without interference within the detection port 14. When the object to be tested is placed in the detection port 14, multiple detection optical paths can penetrate the object to be tested simultaneously. This allows multiple light sources of the transmittance detector to penetrate the object to be tested simultaneously in an independent and non-interfering manner, and each light source is independently received by the electronic device to complete the detection. This avoids the mechanical wear caused by dynamically switching multiple light sources and the complex detection optical path design required for static switching, thereby reducing the instrument size and detection time, while reducing the failure rate, improving detection accuracy and increasing detection efficiency.

[0021] This embodiment employs a multi-channel parallel design, combining multiple independent detection optical paths. Light sources of different wavelengths are independently arranged on the same detection plane, allowing light from each threaded channel 32 to synchronously penetrate the object under test. The electronic array captures multiple sets of light intensity signals in real time, and the mainboard 5 processes and outputs full-spectrum transmittance data in parallel. This method can simultaneously emit multiple light rays. By optimizing the optical path layout and electronic array arrangement, multiple independent light sources can be simultaneously detected, achieving interference-free parallel acquisition between channels. This allows for multi-parameter detection in a single operation, ensuring data independence and accuracy, and significantly improving detection efficiency, precision, and data consistency. Each optical channel corresponds to a single light source, eliminating the need for mechanical switching, making the detection optical path independent and stable, and greatly improving detection speed and accuracy. This method also eliminates the need for mechanical switching structures in the instrument, reducing the failure rate, improving detection speed and accuracy, and enabling efficient and stable batch sample analysis, meeting the urgent needs of industrial sites for rapid and accurate optical detection.

[0022] In this embodiment, each detection optical path employs an independent light source and independent receiving electronics to avoid optical path crosstalk and ensure measurement accuracy. The instrument features a compact structure and modular design, facilitating maintenance and upgrades. It is suitable for batch transmittance analysis of various materials, especially for high-end materials with stringent optical performance requirements. It effectively overcomes the drawbacks of traditional equipment, such as large size, high cost, and limited detection modes, demonstrating promising prospects for industrial application. It effectively reduces unit detection costs, meeting the urgent needs of modern industry for efficient and accurate detection. Simultaneously, it supports customized expansion to meet multi-band detection requirements, accommodating diverse industry application scenarios. Compared to traditional structures, this instrument significantly reduces manufacturing costs while maintaining high accuracy, and its smaller size makes it suitable for online detection in laboratories and production lines, driving the development of transmittance detection technology towards high efficiency, intelligence, and widespread adoption.

[0023] In practical applications, the motherboard 5 is penetrated by the detection port 14, meaning a detection notch 54 is formed on the motherboard 5 directly opposite the detection port 14. This allows the object being tested to span across the opposite sides of the detection port 14, enabling even relatively large objects to fit into the detection port 14 and improving compatibility with objects of different sizes. Additionally, it serves to position the motherboard 5 for proper mounting and assembly with the outer casing 1, improving structural assembly accuracy and enhancing the overall stability of the instrument.

[0024] Preferably, each threaded channel 32 is provided with a light-emitting aperture 35, which is located on the output side of the first light-emitting element 34 and is spaced apart from the light-emitting convex lens 31; the opening of the light-emitting aperture 35 is directly opposite the first light-emitting element 34.

[0025] The opening of the light-emitting aperture 35 is positioned directly opposite the first light-emitting element 34, ensuring that only the main light rays emitted from the first light-emitting element 34 (specifically, parallel light in the central region of the light beam) are allowed to pass through the threaded channel 32. The edge light rays emitted by the first light-emitting element 34 are blocked by the edge of the light-emitting aperture 35, thereby improving the collimation and uniformity of the beam and reducing stray light interference with the detection results. This further improves the signal-to-noise ratio and detection stability of the optical channel, ensuring that the optical paths of each channel are independent and do not crosstalk, providing a reliable guarantee for high-precision transmittance measurement. Simultaneously, the coordinated design of the light-emitting aperture 35 and the light-emitting convex lens 31 optimizes the light field distribution, making the output light spot more concentrated and the energy distribution more uniform, effectively improving the consistency and repeatability of the detection signal.

[0026] In the specific configuration, the opening of the light-emitting aperture 35 is smaller than the outer diameter of the first light-emitting element 34, preferably a light-transmitting aperture with a diameter of 2mm. Its size is optimized to effectively capture the central area of ​​the light source, suppress the diffraction edge effect, ensure the collimation and spatial consistency of the emitted beam, and ensure high light transmission efficiency while minimizing stray light interference.

[0027] In another preferred embodiment, the receiving component 2 further includes a first filter 24 disposed within the detection channel 21, the first filter 24 being disposed between the incident light convex lens 22 and the silicon photovoltaic cell 25.

[0028] The first filter 24 is configured so that light passes through it before being received by the silicon photodiode 25. The first filter 24 selectively filters light of specific wavelengths, allowing the silicon photodiode 25 to receive and detect that specific light. This shields against ambient light and interference from non-target wavelengths, further enhancing the system's anti-interference capability and measurement accuracy. The coordinated design of the first filter 24 and the first light-emitting element 34 allows for flexible configuration based on the optical characteristics of the material under test, enabling multi-band, highly selective transmittance analysis. This is particularly suitable for precision testing scenarios in complex spectral environments, providing a stable and reliable optical testing method for industrial sites.

[0029] In a specific configuration, the light emitted by a single first light-emitting element 34 can be visible white light, ultraviolet light, or 940 nm near-infrared light, etc. This embodiment does not limit this and can be flexibly selected according to actual detection needs. In multiple detection optical paths, multiple first light-emitting elements 34 need to be set, and each first light-emitting element 34 can be configured with a light source of different wavelengths. For example, three threaded channels 32 are set, and the first light-emitting elements 34 in each threaded channel 32 are respectively configured to emit visible white light, ultraviolet light, and 940 nm near-infrared light. Through parallel acquisition, multispectral synchronous detection can be achieved, and transmittance data of materials in different wavelength bands can be quickly obtained, improving detection efficiency and information dimensions. Among them, each first light-emitting element 34 works independently, and works with the first filter 24 and silicon photodiode 25 of the corresponding detection channel 21 to ensure that light signals of different wavelengths do not interfere with each other. Correspondingly, when the first light-emitting element 34 emits visible white light, a color filter is selected as the first filter 24; when the first light-emitting element 34 emits ultraviolet light, a violet filter is selected as the first filter 24; when the first light-emitting element 34 emits 940 nm near-infrared light, the first filter 24 is not required, because 940 nm near-infrared light has less interference in the environment and the silicon photodiode 25 is sensitive to this wavelength, allowing for efficient detection directly through photoelectric conversion. This design balances multi-band adaptability with system simplification requirements, reducing hardware redundancy while ensuring measurement accuracy, and is particularly suitable for the integrated development of portable multispectral transmittance analysis equipment.

[0030] In this embodiment, the threaded channels 32 are made of aluminum alloy and undergo anodized matte black treatment, which has the advantages of wear resistance, oxidation resistance, and high heat dissipation efficiency. All the threaded channels 32 can also be integrated into a transmitter base 33, which has at least two spaced threaded channels 32. Similarly, all the detection channels 21 can also be integrated into a receiver base 26, which has the same number of detection channels 21 as the threaded channels 32.

[0031] Similarly, each detection channel 21 is provided with an entrance aperture 23, which is located on the receiving side of the silicon photovoltaic cell 25 and is spaced apart from the entrance convex lens 22; the opening of the entrance aperture 23 faces the silicon photovoltaic cell 25.

[0032] The opening of the entrance aperture 23 is positioned directly opposite the silicon photodiode 25, allowing light to pass through the effective light-passing area defined by the opening of the entrance aperture 23 after being focused by the entrance convex lens 22. This further shields stray light interference, ensuring that the light signal entering the silicon photodiode 25 has clear spatial directionality and a stable light intensity distribution. This method effectively suppresses the influence of non-axial ambient light on the detection results, improves the signal-to-noise ratio and measurement repeatability, and is particularly suitable for transmittance analysis scenarios under high-precision, low-illuminance conditions. The coordinated design of the entrance aperture 23 and the entrance convex lens 22 achieves dual optimization of spatial filtering and energy focusing in the optical system, not only defining the detection field of view but also suppressing measurement deviations caused by multiple reflections and edge scattering. By adjusting the aperture size, it can be adapted to detection tasks with different sensitivity requirements, improving axial selectivity while ensuring sufficient light intake. This structure is particularly suitable for transmittance measurement of curved materials or non-uniform samples, maintaining stable response characteristics under complex incident conditions.

[0033] Furthermore, a second light-emitting element 4 is provided on one side of the detection port 14, spaced apart from the transmitting component 3; a receiving module 6 is provided on the opposite side of the detection port 14, spaced apart from the receiving component 2. The receiving module 6 includes a second filter and a receiving sensor. The second filter is located between the receiving sensor and the detection port 14, and is directly opposite the second light-emitting element 4. Both the second light-emitting element 4 and the receiving sensor are connected to the main board 5.

[0034] In addition to using a channel to construct the detection optical path, this embodiment also constructs a non-channel detection optical path through the second light-emitting element 4 and the receiving component 2. Specifically, the second light-emitting element 4 emits light and projects it directly onto the object under test. The light passes sequentially through the object under test and the second filter before being received by the receiving sensor, achieving synchronous acquisition of the transmitted light. The non-channel detection optical path enriches the detection dimensions and improves adaptability and compatibility with different objects under test.

[0035] In the specific configuration, the second light-emitting element 4 emits 1400-nanometer near-infrared light, which can effectively penetrate smog and thin organic coverings. Correspondingly, the second filter is a red light filter, used to suppress background visible light interference and improve the purity of the near-infrared signal reception, thereby ensuring the response sensitivity and stability of the receiving sensor.

[0036] Preferably, the second light-emitting element 4 and the receiving module 6 are both located inside the housing 1, and through holes 14 are provided on both sides of the detection port 14, with the two through holes 14 respectively facing the second light-emitting element 4 and the receiving module 6.

[0037] Both the second light-emitting element 4 and the receiving module 6 are housed within the outer casing 1, which provides physical protection for them. The two through holes 14 on the outer casing 1 correspond to the optical paths of the second light-emitting element 4 and the receiving module 6, respectively, acting as apertures. These holes allow only the main light rays from the second light-emitting element 4 to pass through the corresponding through hole 14, ensuring the collimation of the emitted light and eliminating edge rays and stray light. The other through hole 14 also only allows the reception of light signals propagating along the optical axis, further suppressing non-axial stray light interference.

[0038] In another improvement of this embodiment, the transmitting component 3 and the receiving component 2 are both located on the first side 53 of the motherboard 5, and the display screen 7 is located on the second side 55 of the motherboard 5. The first side 53 and the second side 55 of the motherboard 5 are opposite sides of the motherboard 5. The outer casing 1 has a display window 16 facing the display screen 7. A cable port 52 is provided at the edge of the motherboard 5. The display screen 7 is provided with a ribbon cable 71 and a power supply cable 72. Both the ribbon cable 71 and the power supply cable 72 are located in the cable port 52 and are connected to the first side 53 of the motherboard 5.

[0039] This embodiment displays the test results, allowing users to view transmittance data in real time. In addition, this embodiment can also output the test results as exported data via the motherboard 5; this embodiment does not impose many restrictions on the output method.

[0040] The display screen 7 is fixed to the second side 55 of the motherboard 5, while the transmitting component 3 and the receiving component 2 are fixed to the first side 53 of the motherboard 5. This layout effectively utilizes the space structure, avoids increasing the footprint of the motherboard 5, and achieves compact integration of functional modules. The ribbon cable 71 and power supply cable 72 on the display screen 7 are led out from the cable outlet 52 and connected to the first side 53 of the motherboard 5, sharing the same side of the motherboard 5 with the transmitting component 3 and the receiving component 2. This avoids double-sided conductive design and double-sided soldering on the motherboard 5, thereby reducing production difficulty and cost. The overall structure is compact and the wiring is simple, balancing signal transmission efficiency and electromagnetic compatibility, making it suitable for portable testing applications.

[0041] The specific connection between the display screen 7 and the motherboard 5 is as follows: a connector 8 is provided on a pair of opposite corners of the display screen 7. The connector 8 is snapped into the display screen 7 and is detachably connected to the second side 55 of the motherboard 5.

[0042] The connector 8 is a pressure piece, which is fixed to the motherboard 5 with screws. The motherboard 5 is clamped between the connector 8 and the motherboard 5. The connector 8 is also provided with a locking position, which engages with the corner of the motherboard 5 to prevent positioning of the display screen 7 along the plane of the motherboard 5, thus preventing displacement and ensuring that the display screen 7 is installed securely.

[0043] The specific structure of the outer shell 1 is as follows: the outer shell 1 includes two end plates 12, a sealing plate 15, and a hollow shell 13. The inner cavity of the shell 13 extends through the opposite ends of the shell 13. The inner wall of the shell 13 is provided with a slot 19, both ends of which are open and directly opposite the opposite ends of the shell 13. There are two slots 19, and the main board 5 is snapped between the two slots 19. The two end plates 12 correspond to and are connected to the opposite ends of the shell 13. The detection port 14 is located at the edge of the housing 13, penetrates the housing 13, and communicates with the inner cavity of the housing 13; the sealing plate 15 matches the contour of the detection port 14, and a top rod 18 is provided inside the housing 13 facing the center of the detection port 14. The center of the sealing plate 15 is connected to the top rod 18, and the opposite sides of the sealing plate 15 are respectively connected to the inner wall of the housing 13.

[0044] In this embodiment, the housing 13, end plate 12 and sealing plate 15 are all integrally formed from aluminum alloy and subjected to anodized matte black treatment, which gives the housing 1 the advantages of wear resistance, oxidation resistance and high heat dissipation efficiency.

[0045] In practical use, the edge of the detection notch 54 of the main board 5 is provided with an installation notch 51 located in the middle of the detection port 14. The push rod 18 is located in the installation notch 51. The installation notch 51 and the push rod 18 cooperate to achieve a limiting effect, preventing the main board 5 from moving along the length of the housing 13 within the housing 13. One end of the push rod 18 is pressed against one side of the inner wall of the housing 13, and the other end of the push rod 18 is pressed against the opposite side of the inner wall of the housing 13. That is, the opposite two sides of the inner wall of the housing 13 clamp the push rod 18. The push rod 18 and the two sides of the inner wall of the housing 13 are interference fit, thereby ensuring that the push rod 18 is stably fixed in the width direction of the housing 13, so that the sealing plate 15 fixed on the push rod 18 is also stably fixed to the housing 13 along the width direction of the housing 13. In the specific connection, the inner wall of the housing 13 is provided with several connecting posts, which correspond one-to-one with the opposite sides of the two end plates 12 and the sealing plate 15. The opposite sides of the two end plates 12 and the sealing plate 15 are connected to the connecting posts by bolts to fix them on the housing 13, forming a closed and stable inner cavity of the outer shell 1.

[0046] In this embodiment, one of the slots 19 is interrupted by the detection port 14, resulting in a discontinuous distribution of the interrupted slots 19. However, it still effectively holds the motherboard 5, ensuring that the slot 19 and the detection port 14 are located on the same side of the housing 13. The other slot 19 is located on the opposite side of the housing 13, achieving symmetrical positioning of the motherboard 5 within the housing 13, thereby saving space and improving structural compactness. In a specific configuration, the detection port 14 and one slot 19 are both located at the top of the housing 13, while the other slot 19 is located at the bottom of the housing 13, forming a symmetrical layout that further improves the space utilization within the housing 13.

[0047] Additionally, a support foot 11 is provided on one side of the outer casing 1 (specifically, one side of the outer casing 13). The support foot 11 allows the outer casing 1 (specifically, the outer casing 13) to be tilted, preferably at an angle of 80°, facilitating the operator's observation of the display screen 7 content and / or operation on the outer casing 1. The display window 16 on the outer casing 1 is opened on the outer casing 13, and the display window 16 and the support foot 11 are located on opposite sides of the outer casing 1. The outer casing 1 (specifically, the outer casing 13) is also provided with a transparent protective panel 17, which covers the outside of the display window 16 and is waterproofly and sealed to the outer casing 13, effectively preventing dust and moisture. In addition to acrylic material, the protective panel 17 can also be made of high-transmittance tempered glass to ensure clear display and scratch and wear resistance. Furthermore, a silkscreened nameplate or other patterns can be added to the protective panel 17 to facilitate device identification or improve appearance recognition. A sealing ring is provided between the protective panel 17 and the outer casing 13 to ensure that external liquids and dust cannot enter the display window 16 area. The outer casing 1 (specifically end plate 12) is also equipped with an adjustment knob 121, a socket 122 and a switching power supply 123, all of which are connected to the main board 5.

[0048] like Figures 1-6 As shown, this embodiment also provides a method for assembling a multi-channel parallel transmittance detector, including the multi-channel parallel transmittance detector as described above, and further including the following installation steps: Insert the motherboard 5 into the two slots 19 from one end of the housing 13, and push the motherboard 5 along the slots 19 until the detection notch 54 on the motherboard 5 is aligned with the detection port 14. The push rod 18 is pressed between the opposite side walls of the housing 13 from the detection port 14. The middle part of the sealing plate 15 is connected to the push rod 18, and the opposite sides of the sealing plate 15 are respectively connected to the inner wall of the housing 13. The two pieces are respectively connected to the inner walls of the corresponding ends of the housing 13.

[0049] Preferably, pressing the push rod 18 between the opposite side walls of the housing 13 from the detection port 14 includes: The push rod 18 is inserted into the mounting notch 51 of the main board 5, so that the two ends of the push rod 18 abut against the opposite side walls of the housing 13.

[0050] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A multi-channel parallel transmittance detector, comprising a housing, wherein a main board for outputting detection information is disposed within the housing, characterized in that, The outer casing has a detection port that penetrates the motherboard at its edge. A transmitting component is located inside the outer casing on one side of the detection port. The transmitting component includes a threaded channel communicating with the detection port, a first light-emitting element and a light-emitting convex lens that are all disposed in the threaded channel and spaced apart from each other. The first light-emitting element is connected to the motherboard. On the opposite side of the detection port, there is a receiving component inside the housing. The receiving component includes a detection channel that communicates with the detection port and faces the threaded channel, a silicon photocell and an incident light convex lens that are all disposed in the detection channel and spaced apart from each other. The silicon photocell is connected to the motherboard. The silicon photocell, the incident light convex lens, the detection port, the exit light convex lens and the first light-emitting element are arranged in sequence. The transmitting component is provided in at least two parts, and is arranged in sequence with intervals; the number of receiving components is equal to the number of transmitting components, and each receiving component corresponds to each transmitting component.

2. The multi-channel parallel transmittance detector according to claim 1, characterized in that, Each of the threaded channels is provided with a light-emitting aperture, which is located on the output side of the first light-emitting element and is spaced apart from the light-emitting convex lens; the opening of the light-emitting aperture is directly opposite the first light-emitting element.

3. The multi-channel parallel transmittance detector according to claim 1, characterized in that, The receiving component further includes a first filter disposed within the detection channel, the first filter being positioned between the incident convex lens and the silicon photovoltaic cell.

4. The multi-channel parallel transmittance detector according to claim 1, characterized in that, Each detection channel is equipped with an entrance light aperture, which is located on the receiving side of the silicon photovoltaic cell and spaced apart from the entrance light convex lens; the opening of the entrance light aperture faces the silicon photovoltaic cell.

5. The multi-channel parallel transmittance detector according to any one of claims 1-4, characterized in that, A second light-emitting element is also provided on one side of the detection port, spaced apart from the transmitting component; a receiving module is also provided on the opposite side of the detection port, spaced apart from the receiving component. The receiving module includes a second filter and a receiving sensor. The second filter is located between the receiving sensor and the detection port, and is directly opposite the second light-emitting element. Both the second light-emitting element and the receiving sensor are connected to the motherboard.

6. The multi-channel parallel transmittance detector according to claim 5, characterized in that, The second light-emitting element and the receiving module are both located inside the housing. Through holes are provided on both sides of the detection port, and the two through holes are respectively directly opposite the second light-emitting element and the receiving module.

7. The multi-channel parallel transmittance detector according to any one of claims 1-4, characterized in that, The transmitting component and the receiving component are both located on the first side of the motherboard, and a display screen is located on the second side of the motherboard. The first side and the second side of the motherboard are opposite sides of the motherboard. A display window facing the display screen is provided on the outer casing. A cable port is provided at the edge of the motherboard. A ribbon cable and a power supply cable are provided on the display screen. The ribbon cable and the power supply cable are both located in the cable port and are both connected to the first side of the motherboard.

8. The multi-channel parallel transmittance detector according to claim 7, characterized in that, The display screen has connectors at a pair of opposite corners, which snap onto the display screen and are detachably connected to the second side of the motherboard.

9. The multi-channel parallel transmittance detector according to claim 7, characterized in that, The outer casing includes two end plates, a sealing plate, and a hollow shell structure. The inner cavity of the shell extends through the opposite ends of the shell. The inner wall of the shell is provided with slots, both ends of which are open and directly opposite the opposite ends of the shell. There are two slots, and the main board is secured between the two slots. The two end plates correspond to and are connected to the opposite ends of the shell. The detection port is located at the edge of the housing, penetrates the housing, and communicates with the inner cavity of the housing; the sealing plate matches the contour of the detection port, the housing has a top rod facing the center of the detection port, the center of the sealing plate is connected to the top rod, and the opposite sides of the sealing plate are respectively connected to the inner wall of the housing.

10. A method for assembling a multi-channel parallel transmittance detector, comprising the multi-channel parallel transmittance detector as described in claim 9, characterized in that, The following installation steps are also included: Insert the motherboard into the two slots from one end of the housing, and push the motherboard along the slots until the detection notch on the motherboard is aligned with the detection port; The push rod is pressed between the opposite side walls of the housing from the detection port, the middle part of the sealing plate is connected to the push rod, and the opposite sides of the sealing plate are respectively connected to the inner wall of the housing; The two pieces are respectively connected to the inner walls of the corresponding ends of the housing.

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