A rapid batch detection instrument for circuit board signals of a water quality analyzer

Abstract

This application relates to a rapid batch testing instrument for circuit board signals in a water quality analyzer, belonging to the field of circuit board testing technology. It includes a cabinet 1, a control component 4, an optical path component, and a circuit board placement component. The touchscreen of the control component 4 is embedded in the outer surface of the cabinet 1, facilitating parameter setting, command issuance, and data viewing by the operator. The optical path component and the circuit board placement component are located inside the cabinet 1, realizing the generation and acquisition of optical signals and the batch placement and testing of circuit boards. This application, through optimized structural design of the optical path component and the circuit board placement component, achieves rapid assembly and disassembly of circuit boards, batch testing, and precise calibration of the optical path, improving testing efficiency and accuracy, solving the core pain points of existing technologies, and meeting the testing needs of large-scale production lines.

Description

Technical Field

[0001] This application belongs to the field of circuit board testing technology, specifically relating to a rapid batch testing instrument for circuit board signals of a water quality analyzer. Background Technology

[0002] Online water quality monitoring and analysis instruments are core equipment in water environment monitoring systems, and their operational stability and detection accuracy directly depend on the performance of their internal circuit boards. Currently, some domestic manufacturers of online water quality monitoring and analysis instruments have incomplete quality management systems, lax production processes and control, loopholes in incoming material inspection and calibration, outdated inspection methods, and a lack of precision testing equipment.

[0003] Existing technologies for testing circuit boards in water quality analyzers have several drawbacks: First, the testing efficiency is low, with most systems employing manual testing of a single circuit board, which cannot meet the high-efficiency testing requirements of mass production. Second, the circuit board assembly and disassembly are cumbersome, and the electrical connections are unreliable, leading to problems such as poor contact and signal distortion during batch testing. Third, the replacement of quantitative tubes and solvent filling are complex, time-consuming, and labor-intensive, and are prone to solvent leakage, affecting the reliability of calibration and testing. Fourth, the circuit board placement components have poor adaptability, failing to flexibly accommodate circuit boards of different sizes and being inconvenient to handle, further reducing testing efficiency.

[0005] Therefore, there is an urgent need for a rapid batch detection instrument for water quality analyzer circuit board signals that can achieve batch, fast, and high-precision detection, and has convenient assembly and disassembly, accurate calibration, and strong adaptability, in order to make up for the shortcomings of existing technologies. Summary of the Invention

[0006] The technical problem to be solved by this application is to overcome the shortcomings of the prior art and provide a rapid batch detection instrument for circuit board signals of water quality analyzers. This application achieves rapid assembly and disassembly of circuit boards, batch detection, and accurate calibration of the optical path by optimizing the structural design of the optical path components and circuit board placement components, thereby improving detection efficiency and accuracy, solving the core pain points of the prior art, and meeting the detection needs of large-scale production lines.

[0007] The technical solution adopted in this application to solve the problems existing in the prior art is: A rapid batch detection instrument for circuit board signals of a water quality analyzer includes a cabinet, a control component, an optical path component, and a circuit board placement component.

[0008] The touch screen of the control component is embedded on the outer surface of the cabinet. The optical path component and the circuit board placement component are located inside the cabinet. A cabinet door is provided on one vertical side of the cabinet, and the circuit board placement component can be retrieved or placed by opening the cabinet door.

[0009] The optical path assembly includes a mounting base assembly, which includes a mounting base. The mounting base has a central recessed quantitative tube insertion hole, one end of which is open and used to place a quantitative tube.

[0010] The mounting base has several spaced-apart light source mounting holes connected to one side of the quantitative tube insertion hole, with the axial direction of these holes aligned radially with the quantitative tube insertion hole. On the other side of the quantitative tube insertion hole, several absorber photocell mounting holes are connected, each corresponding to and coaxially arranged with the light source mounting holes. A reference photocell mounting hole is also connected to each light source mounting hole.

[0011] An LED light source is installed in the opening on the outer wall of the mounting base, the light source mounting hole is installed in the opening on the outer wall of the mounting base, and the reference photocell mounting hole is installed in the opening on the outer wall of the mounting base, all of which are electrically connected to the control components.

[0012] The circuit board placement assembly is used to place several circuit boards to be inspected. The circuit board placement assembly includes quick-connect aviation plugs and terminals that are electrically connected to each other. The terminals are electrically connected to the circuit boards to be inspected.

[0013] The cabinet is equipped with a quick-connect aviation socket that is electrically connected to the control components. The quick-connect aviation socket is plugged into and connected to the quick-connect aviation plug.

[0014] Furthermore, the optical path assembly also includes a quantitative tube placement assembly, which is disposed at one end of the fixing seat located at the opening of the quantitative tube insertion hole.

[0015] The quantitative tube placement assembly includes a placement frame, a servo motor, an electric linear module, and an electromagnet.

[0016] The placement rack is provided with several clamping components arranged in a circular array around its center line. A quantitative tube is clamped and fixed in the middle of the clamping components, and one of the clamping components is arranged coaxially with the quantitative tube insertion hole of the fixing seat.

[0017] The servo motor drives the placement frame and causes the placement frame to rotate around its center line.

[0018] The electric linear module is mounted on one side of the placement frame. The sliding part of the electric linear module is fixedly connected to the electromagnet via a push rod. The electromagnet is arranged coaxially with the quantitative tube insertion hole. The electric linear module drives the electromagnet to reciprocate along the axial direction of the quantitative tube insertion hole.

[0019] The servo motor and electromagnet are both electrically connected to the control components.

[0020] Furthermore, the placement frame includes a first rotating shaft arranged coaxially with its center line. The clamping assembly includes a first arc-shaped clamping plate and a second arc-shaped clamping plate arranged coaxially and spaced apart from each other. Adjacent clamping assemblies are fixedly connected by a connecting plate, and the connecting plate is fixedly connected to the first rotating shaft by a connecting rod.

[0021] The output shaft of the servo motor is coaxially and fixedly connected to the first rotating shaft.

[0022] Furthermore, the curvature of the first and second arc-shaped clamping plates is between 60° and 120°. The gap between the first and second arc-shaped clamping plates is used for the push rod to pass through.

[0023] Furthermore, the metering tube includes a tube body and a top cover, the top cover being detachably connected to the opening of the tube body. The top cover is arranged facing the electromagnet and is made of a magnetic material.

[0024] Furthermore, the circuit board placement assembly includes a placement cabinet, on which the quick-connect aviation plug and wiring terminals are fixed. Several circuit board supports are detachably connected to the placement cabinet, and these supports are used for detachably mounting the circuit boards to be inspected.

[0025] Furthermore, the placement cabinet includes a base plate and upright plates fixedly connected to the upper sides of both sides of the base plate. The upright plates have a perforated open window in the center. The end faces of the upright plates have several layers of connection holes arranged at intervals along the vertical direction. The circuit board bracket is detachably connected to the placement cabinet via fasteners passing through the connection holes.

[0026] The bottom plate has insert plates extending downwards on both sides, and the cabinet has a snap-fit ​​assembly inside, with the insert plates snapping into the snap-fit ​​assembly.

[0027] A handle is fixedly installed on the side of the upright panel facing the cabinet door.

[0028] Furthermore, the circuit board support includes a support body, a polygonal rotating rod, a torsion spring, a T-shaped sliding sleeve, and a pressure plate.

[0029] The bracket body includes two spaced-apart support plates, which are fixedly connected by a U-shaped rod located below. Each support plate has a mounting plate at its end, and the mounting plate has through holes for fasteners to pass through these holes.

[0030] The support plate has a rotating groove recessed on its outer wall between the two end mounting plates, and the support plate is provided with a rotating hole that is connected to the rotating groove.

[0031] The polygonal rotating rod is rotatably mounted inside the rotating groove. Two second rotating shafts are coaxially fixed to both ends of the polygonal rotating rod, and these second rotating shafts are rotatably inserted into rotating holes. One of the second rotating shafts extends beyond the support plate and is fitted with a torsion spring. The two ends of the torsion spring are fixedly connected to the second rotating shaft and the support plate, respectively.

[0032] The horizontal part of the T-shaped sliding sleeve is slidably fitted above the polygonal rotating rod, and the end of its vertical part is slidably connected to a sliding rod, the end of which is fixedly connected to a pressure plate. The pressure plate is used to press and fix the circuit board to be inspected, which is placed on the support plate.

[0033] Furthermore, a passive bevel gear is coaxially fixed to one end of the second rotating shaft located on the outside of the support plate.

[0034] A third rotating shaft is installed between the two support plates and is rotatably connected to the support plates. An active bevel gear is provided at the end of the third rotating shaft, and the active bevel gear meshes with a passive bevel gear.

[0035] A handle is fixed on the third rotating shaft and connected coaxially.

[0036] Furthermore, the snap-fit ​​assembly includes a U-shaped baffle fixed to the bottom plate of the cabinet, with the opening of the U-shaped baffle facing the cabinet door. Support plates, spaced apart from the bottom plate, are fixed to the inner sides of the two opposite end faces of the U-shaped baffle. The support plate at the end near the cabinet door is an upwardly inclined guide plate.

[0037] The height gap between the support plate and the cabinet bottom plate matches the thickness of the insert plate. The insert plate is inserted below the support plate, and the inner wall of the U-shaped baffle abuts against the outer wall of the insert plate.

[0038] Compared with the prior art, the beneficial effects of this application are as follows: (1) Through the quick assembly and disassembly design of the circuit board placement components and the quick electrical connection of the quick-connect aviation plug / socket, combined with the automatic switching and pushing function of the optical path component quantitative tube, multiple circuit boards can be batch synchronously tested, and the testing efficiency is improved by more than 80% compared with the existing equipment, which is suitable for the high-efficiency testing needs of large-scale production lines.

[0039] (2) The fixed base is designed as an integral molding to ensure that the mounting holes of the light source, the absorbing photocell and the reference photocell are coaxial. Combined with a high-stability LED light source and a high-sensitivity photocell, and a modular quantitative tube and an automatic calibration mechanism, the light signal can be accurately calibrated and stably transmitted, and the detection accuracy can be improved by more than 30%. It can accurately quantify and detect the signal stability, repeatability and drift, rather than just judging whether the signal is present or not.

[0040] (3) The circuit board bracket adopts a handle + bevel gear + torsion spring transmission structure, which can be quickly pressed / lifted without tools and is suitable for circuit boards of different sizes; the quick-connect aviation plug and socket are plugged and unplugged, eliminating the need for manual wiring, greatly reducing the difficulty of installation and disassembly, avoiding poor contact and signal distortion, and improving the stability and convenience of batch testing.

[0041] (4) The quantitative tube adopts a modular design, is pre-filled with solvent and sealed, and is labeled with concentration and expiration date, so as to achieve "ready to use after replacement"; in conjunction with the servo motor, electric linear module and electromagnet of the quantitative tube placement assembly, the quantitative tube can be automatically switched and accurately pushed, without the need for manual filling of solvent, avoiding leakage, and greatly improving the convenience and reliability of calibration.

[0042] (5) The placement cabinet can be quickly picked up and put in using the snap-fit ​​assembly. The circuit board bracket can be adjusted in height and spacing through the connection holes to accommodate different sizes of circuit boards to be inspected. The design of the cabinet handle and guide ramp further improves the ease of picking up and putting in, solving the problems of poor compatibility and cumbersome picking up and putting in existing equipment. Attached Figure Description

[0043] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0044] Figure 1 This is a first external structural diagram of a rapid batch detection instrument for circuit board signals of a water quality analyzer according to this application. Figure 2 This is a second external structural diagram of a rapid batch detection instrument for circuit board signals of a water quality analyzer according to this application. Figure 3 This is a first structural diagram of the optical path component in a batch rapid detection instrument for circuit board signals of a water quality analyzer according to this application. Figure 4 This is the second structural diagram of the optical path component. Figure 5 This is a structural diagram of the mounting bracket assembly in the optical path component. Figure 6 This is a first sectional view of the mounting bracket assembly. Figure 7 This is the second sectional view of the mounting bracket assembly. Figure 8 This is a structural diagram of the quantitative tube placement assembly in the optical path assembly. Figure 9 This is a structural diagram of the mounting bracket in the quantitative tube placement assembly. Figure 10 This is a structural diagram of the metering tube in the metering tube placement assembly. Figure 11 This is a structural diagram of the circuit board placement assembly in a batch rapid detection instrument for circuit board signals of a water quality analyzer according to this application. Figure 12This is a structural diagram of the cabinet used in the circuit board placement assembly. Figure 13 This is a structural diagram showing the circuit board support and the circuit board connected in the circuit board placement assembly. Figure 14 This is a diagram of the circuit board support structure. Figure 15 This is a structural diagram of the support body in the circuit board bracket. Figure 16 This is a structural diagram of the transmission component in the circuit board bracket. Figure 17 This is a structural diagram of the snap-fit ​​component in a batch rapid detection instrument for circuit board signals of a water quality analyzer according to this application.

[0045] In the diagram: 1-Cabinet body, 101-Observation window, 2-Top cover plate, 3-Cabinet door, 4-Control components, 5-Fixing base, 501-Quantitative tube insertion hole, 502-Light source mounting hole, 503-Absorbing photocell mounting hole, 504-Reference photocell mounting hole, 6-LED light source, 7-Absorbing photocell, 8-Reference photocell, 9-Quantitative tube, 901-Tube body, 902-Top cover, 10-Placement rack, 1001-First rotating shaft, 1002-Connecting rod, 1003-Connecting plate, 1004-First arc-shaped clamping plate, 1005-Second arc-shaped clamping plate, 11-Servo motor, 12-Electric linear module, 13-Push rod, 14-Electromagnet, 15-Placement cabinet, 1501-Base plate, 1 502-Plug, 1503-Upright plate, 1504-Open window, 1505-Connection hole, 1506-Handle, 16-Quick-connect aviation plug, 17-Terminal block, 18-Bracket body, 1801-Support plate, 1802-Rotating groove, 1803-Rotating hole, 1804-Mounting plate, 1805-U-shaped rod, 19-Polygonal rotating rod, 1901-Second rotating shaft, 1902-Passive bevel gear, 20-Torsion spring, 21-T-shaped sliding sleeve, 22-Pressure plate, 2201-Sliding rod, 23-Third rotating shaft, 2301-Active bevel gear, 2302-Handle, 24-Circuit board to be inspected, 25-Quick-connect aviation socket, 26-U-shaped baffle, 27-Pressure plate, 2701-Slanted plate. Detailed Implementation

[0046] Combined with appendix Figure 1 To be continued Figure 17 This application provides a detailed description of a rapid batch detection instrument for circuit board signals of a water quality analyzer, but this is not intended to limit the scope of this application.

[0047] A rapid batch detection instrument for circuit board signals of a water quality analyzer includes a cabinet 1, a control component 4, an optical path component, and a circuit board placement component. The touchscreen of the control component 4 is embedded in the outer surface of the cabinet 1, facilitating parameter setting, command issuance, and data viewing by the operator. The optical path component and the circuit board placement component are located inside the cabinet 1, enabling the generation and acquisition of optical signals and the batch placement and detection of circuit boards. A cabinet door 3 is provided on one vertical side of the cabinet 1. The cabinet door 3 is rotatably connected to the cabinet 1 via hinges, allowing the circuit board placement component to be accessed by opening the door 3. A lock can be installed on the door 3 to ensure the safety of the equipment during operation and prevent accidental operation.

[0048] An observation window 101 is provided on the end face opposite to the cabinet door 3 for observing the operation of the optical path components. An openable top cover 2 is provided on top of the cabinet 1 for maintenance. The cabinet 1 is made of anti-static alloy material, and the inner wall has an electromagnetic shielding layer to effectively shield against external electromagnetic interference and signal interference between internal modules. The bottom of the cabinet 1 is equipped with a shock-absorbing base, using a combination of rubber shock-absorbing pads and a metal support structure to reduce the impact of external vibrations on detection accuracy. A heat dissipation panel is provided on the side of the cabinet 1, with a built-in cooling fan and temperature sensor, which can automatically adjust the heat dissipation power according to the internal temperature of the cabinet 1 to ensure long-term stable operation of all components.

[0049] The optical path assembly is responsible for providing a stable, calibrable optical signal to provide a standard input signal for circuit board testing. Its structure includes a mounting bracket assembly and a quantitative tube placement assembly.

[0050] The mounting assembly includes a mounting base 5, which is made of high thermal conductivity 6061 aluminum alloy. It has a square block structure with a black anodized surface for corrosion and anti-reflection. Internally, it has heat dissipation channels to quickly conduct heat generated by the LED light source 6 during operation. The mounting base 5 is integrally molded to ensure that the coaxiality error of each mounting hole is ≤0.05mm, preventing optical path misalignment.

[0051] The fixed base 5 has a central recessed quantitative tube insertion hole 501, one end of which is open. The quantitative tube 9 is placed inside the hole. The inner wall of the quantitative tube insertion hole 501 is lined with a wear-resistant insulating PTFE bushing to reduce friction between the quantitative tube 9 and the hole wall, while also preventing optical signal leakage. The inner diameter of the quantitative tube insertion hole 501 matches the outer diameter of the quantitative tube 9, ensuring that the quantitative tube 9 is coaxial with the optical path after placement.

[0052] The fixing base 5 is connected to a number of spaced light source mounting holes 502 on one side of the quantitative tube insertion hole 501. The axial direction of the light source mounting holes 502 is arranged along the radial direction of the quantitative tube insertion hole 501. The number of light source mounting holes 502 can be set according to the batch testing requirements, preferably 8, to accommodate the simultaneous testing of 8 circuit boards. The holes are evenly spaced, preferably greater than 20mm. Each light source mounting hole 502 has an internal thread on its inner wall for fixing the LED light source 6. The bottom of the mounting hole has a positioning step with a depth of 2mm to ensure that the light-emitting surface of the LED light source 6 is aligned with the center of the light path after installation.

[0053] On the other side of the quantitative tube insertion hole 501, several absorption photocell mounting holes 503 are connected. These absorption photocell mounting holes 503 correspond one-to-one with the light source mounting holes 502 and are coaxially arranged with a coaxiality error ≤0.05mm, ensuring that the light signal emitted by the LED light source 6 can accurately pass through the quantitative tube 9 and be collected by the absorption photocell 7. A reference photocell mounting hole 504 is also connected through the light source mounting hole 502. The reference photocell mounting hole 504 is arranged at a 90° angle perpendicular to the light source mounting hole 502, and a 3mm diameter light guide channel is provided between it and the light source mounting hole 502 for collecting reference light signals that have not passed through the quantitative tube 9.

[0054] An LED light source 6 is installed at the opening on the outer wall of the fixing base 5 via the light source mounting hole 502. The LED light source 6 is a high-brightness, low-drift, long-life model with a wavelength of 550nm, a power of 1W, and a lifespan of ≥5000 hours. The emitting surface is optically polished to ensure uniform light signal. An absorber photocell 7 is installed at the opening on the outer wall of the fixing base 5 via the absorber photocell mounting hole 503. A reference photocell 8 is installed at the opening on the outer wall of the fixing base 5 via the reference photocell mounting hole 504. Both the absorber photocell 7 and the reference photocell 8 are high-sensitivity silicon photocells with a response wavelength of 400nm-700nm and an open-circuit voltage of ≥0.6V. The photosensitive surface of the photocell is directly opposite the center of the light guide channel or the quantitative tube insertion hole 501 to ensure the accuracy of light signal acquisition.

[0055] The LED light source 6, the absorbing photocell 7, and the reference photocell 8 are all electrically connected to the control component 4. The control component 4 can control the LED light source 6 to turn on, turn off, and adjust its brightness. At the same time, it can receive the electrical signals transmitted by the absorbing photocell 7 and the reference photocell 8 and perform data processing and analysis.

[0056] The optical path assembly also includes a quantitative tube placement assembly, which is located at one end of the fixed base 5 at the open end of the quantitative tube insertion hole 501. It is used to realize the batch storage, automatic switching and precise pushing of quantitative tubes 9. With the modular quantitative tube design, it can realize rapid calibration and detection.

[0057] The quantitative tube placement assembly includes a placement frame 10, a servo motor 11, an electric linear module 12, and an electromagnet 14. The placement frame 10 has several clamping components arranged in a circular array around its center line. A quantitative tube 9 is clamped and fixed in the middle of each clamping component. One clamping component is coaxially arranged with the quantitative tube insertion hole 501 of the fixing base 5, ensuring that the quantitative tube 9 can be accurately pushed into the quantitative tube insertion hole 501. Preferably, there are 4-6 clamping components. If 4 are used, they correspond to 1 set of detection concentration quantitative tubes and 3 sets of standard concentration quantitative tubes, enabling rapid switching between multiple concentration solvents to meet calibration and detection needs.

[0058] The placement rack 10 includes a first rotating shaft 1001 arranged coaxially with its center line. The clamping assembly includes a first arc-shaped clamping plate 1004 and a second arc-shaped clamping plate 1005 arranged coaxially and at intervals. Both the first arc-shaped clamping plate 1004 and the second arc-shaped clamping plate 1005 are made of elastic insulating material, and anti-slip silicone pads are pasted on the inner wall. This ensures that the metering tube 9 is firmly clamped, avoids damage to the metering tube 9, and also provides insulation protection. Adjacent clamping assemblies are fixedly connected by a connecting plate 1003. The connecting plate 1003 is fixedly connected to the first rotating shaft 1001 through a connecting rod 1002, forming an integrated structure. This ensures that when the placement rack 10 rotates, all clamping assemblies rotate synchronously and are accurately positioned.

[0059] The servo motor 11 drives the placement rack 10. The servo motor 11 is fixed to a bracket inside the cabinet 1, and its output shaft is coaxially fixedly connected to the first rotating shaft 1001. It can drive the placement rack 10 to rotate around its centerline, achieving coaxial switching between different clamping components and the quantitative tube insertion hole 501, with a switching accuracy ≤0.1mm, ensuring optical path coaxiality. The servo motor 11 is electrically connected to the control component 4, and the rotation angle and switching speed can be set through the control component 4 to achieve automatic switching.

[0060] The electric linear module 12 is disposed on one side of the placement rack 10 and fixed to a bracket inside the cabinet 1. The sliding part of the electric linear module 12 is fixedly connected to the electromagnet 14 via a push rod 13. The electromagnet 14 is coaxially arranged with the quantitative tube insertion hole 501. The electric linear module 12 drives the electromagnet 14 to reciprocate along the axial direction of the quantitative tube insertion hole 501, thereby realizing the pushing and resetting of the quantitative tube 9. The servo motor 11 and the electromagnet 14 are both electrically connected to the control component 4 and are uniformly controlled by the control component 4 to realize automated operation.

[0061] The arc of the first arc-shaped clamping plate 1004 and the second arc-shaped clamping plate 1005 is 60° to 120°, preferably 90°, which ensures that the quantitative tube 9 is firmly clamped while allowing sufficient operating space. The gap between the first arc-shaped clamping plate 1004 and the second arc-shaped clamping plate 1005 is used for the push rod 13 to pass through, ensuring that the push rod 13 can drive the electromagnet 14 to directly contact the quantitative tube 9 for precise pushing.

[0062] The quantitative tube 9 adopts a modular design, including a tube body 901 and a top cover 902. The top cover 902 is detachably connected to the opening of the tube body 901 for easy filling and replenishment of solvent. The top cover 902 is arranged facing the electromagnet 14 and is made of magnetic material, so it can be attracted by the electromagnet 14 to ensure that the quantitative tube 9 does not fall off or deviate during the pushing process, ensuring accurate pushing.

[0063] The tube body 901 is made of high-transmittance quartz glass with a light transmittance of ≥99%, strong corrosion resistance, and does not react with various standard solvents or simulated water samples, avoiding solvent deterioration that could affect calibration and detection accuracy. The dimensions of the tube body 901 are precisely matched to the quantitative tube insertion hole 501, with the outer diameter matching the inner diameter of the quantitative tube insertion hole 501. Each set of quantitative tubes 9 contains an independent tube body filled with one type of simulated water sample at a detection concentration suitable for the water quality analyzer's standard detection range and three graded standard solvents (0 mg / L, 50 mg / L, and 100 mg / L). After pre-filling, the tubes are sealed with the top cap 902, and the concentration, filling date, and expiration date are labeled to prevent solvent evaporation and contamination, enabling "ready to use immediately after replacement."

[0064] 1.1.1.1 The circuit board placement assembly is used to place several circuit boards 24 to be inspected, so as to realize the quick assembly and disassembly, stable fixation and batch electrical connection of the circuit boards 24 to be inspected. Its structure includes a placement cabinet 15, quick-connect aviation plugs 16, terminal blocks 17, circuit board brackets and snap-fit ​​components.

[0065] The circuit board placement assembly includes a placement cabinet 15. The quick-connect aviation plug 16 and the wiring terminal 17 are both fixed on the placement cabinet 15. The quick-connect aviation plug 16 is electrically connected to the wiring terminal 17, and the wiring terminal 17 is electrically connected to the circuit board 24 under test, so as to realize the signal transmission and power supply between the circuit board 24 under test and the control component 4 and the optical path component.

[0066] The placement cabinet 15 includes a base plate 1501 and upright plates 1503 fixedly connected to the upper sides of both sides of the base plate 1501. The base plate 1501 is made of aluminum alloy sheet with an anodized surface treatment to ensure structural strength and corrosion resistance. The upright plate 1503 has a hollowed-out open window 1504 in the middle to facilitate heat dissipation and signal transmission of the circuit board 24 under inspection, while reducing the weight of the placement cabinet 15. The end face of the upright plate 1503 has several layers of threaded connection holes 1505 arranged at intervals in the vertical direction. The circuit board bracket is detachably connected to the placement cabinet 15 by fasteners, preferably bolts, passing through the connection holes 1505. The installation height and spacing of the circuit board bracket can be adjusted according to the size of the circuit board 24 under inspection to improve adaptability.

[0067] The base plate 1501 has insert plates 1502 extending downwards on both sides. The insert plates 1502 are integrally formed with the base plate 1501 and have the same thickness. The cabinet 1 is equipped with a snap-fit ​​assembly. The insert plates 1502 engage with the snap-fit ​​assembly to achieve quick positioning and fixation of the cabinet 15 inside the cabinet 1, facilitating the overall placement and removal of the cabinet 15.

[0068] A handle 1506 is fixedly installed on the side of the upright plate 1503 facing the cabinet door 3. The handle 1506 is made of metal and has anti-slip texture on the surface, which makes it easy for operators to hold and realize the quick retrieval and placement of the cabinet 15.

[0069] The snap-fit ​​assembly includes a U-shaped baffle 26 fixed to the bottom plate of the cabinet 1. The U-shaped baffle 26 is made of stainless steel, and its opening faces the cabinet door 3. Pressure plates 27, spaced apart from the bottom plate of the cabinet 1, are fixed to the inner sides of the two opposite end faces of the U-shaped baffle 26. The pressure plates 27 and the U-shaped baffle 26 are integrally formed and are used to support the insert plate 1502 of the cabinet 15. The end of the pressure plate 27 located at the cabinet door 3 is an inclined plate 2701 with an upward tilt angle of 30°-45°, facilitating the quick insertion of the insert plate 1502 under the pressure plate 27 and serving as a guide.

[0070] The height gap between the pressure plate 27 and the bottom plate of the cabinet 1 matches the thickness of the insert plate 1502, ensuring that the insert plate 1502 fits tightly and without wobbling after insertion. The insert plate 1502 is inserted below the pressure plate 27, and the inner wall of the U-shaped baffle 26 abuts against the outer wall of the insert plate 1502, realizing the left and right positioning of the placement cabinet 15 and preventing the placement cabinet 15 from shifting during the testing process, thus affecting the testing stability.

[0071] The placement cabinet 15 is detachably connected to several circuit board brackets, which are used to detachably install the circuit board 24 to be inspected, so as to realize the quick installation and removal and stable fixation of the circuit board 24 to be inspected, and to adapt to circuit boards 24 of different sizes.

[0072] The circuit board support includes a support body 18, a polygonal rotating rod 19, a torsion spring 20, a T-shaped sliding sleeve 21, and a pressure plate 22. The support body 18 includes two spaced-apart support plates 1801, which are made of insulating and flame-retardant PC board to prevent short circuits in the circuit board 24 under test. The two support plates 1801 are fixedly connected by a U-shaped rod 1805 below, forming a stable frame structure. The U-shaped rod 1805 is made of stainless steel to ensure structural strength.

[0073] The end of the support plate 1801 is connected to the mounting plate 1804, which is integrally formed with the support plate 1801. The mounting plate 1804 has holes that cooperate with fasteners passing through the connection holes 1505 to achieve a detachable connection between the circuit board bracket and the placement cabinet 15, which facilitates the replacement and adjustment of the bracket.

[0074] The support plate 1801 has a recessed rotating groove 1802 on its outer wall between the two end mounting plates 1804. The size of the rotating groove 1802 matches the polygonal rotating rod 19 and is used to accommodate the polygonal rotating rod 19. The support plate 1801 is provided with a rotating hole 1803 that is connected to the rotating groove 1802. The inner diameter of the rotating hole 1803 matches the second rotating shaft 1901 to ensure that the second rotating shaft 1901 can rotate flexibly.

[0075] The polygonal rotating rod 19 is rotatably mounted inside the rotating groove 1802. The cross-section of the polygonal rotating rod 19 is preferably a regular hexagon to prevent rotation during the sliding of the T-shaped sliding sleeve 21. A second rotating shaft 1901 is coaxially fixed to both ends of the polygonal rotating rod 19. The second rotating shaft 1901 is rotatably inserted into the rotating hole 1803, enabling the rotational installation of the polygonal rotating rod 19. One end of the second rotating shaft 1901 extends out of the support plate 1801 and is fitted with a torsion spring 20. Both ends of the torsion spring 20 are fixedly connected to the second rotating shaft 1901 and the support plate 1801, respectively. When the torsion spring 20 is in its natural state, it drives the polygonal rotating rod 19 to rotate, causing the pressure plate 22 to press against the circuit board 24 to be inspected.

[0076] The horizontal portion of the T-shaped sliding sleeve 21 is slidably fitted above the polygonal rotating rod 19, and its vertical end is slidably connected to a sliding rod 2201. The axis of the sliding rod 2201 is perpendicular to the support plate 1801 and can slide up and down along the vertical portion of the T-shaped sliding sleeve 21 to accommodate circuit boards 24 with different layouts. The end of the sliding rod 2201 is fixedly connected to a pressure plate 22. The pressure plate 22 is made of insulating silicone material and has anti-slip texture on its surface. The pressure plate 22 is used to press and fix the circuit board 24 to be inspected, which is placed on the support plate 1801, ensuring a stable fixation while avoiding damage to the electronic components of the circuit board 24.

[0077] A driven bevel gear 1902 is coaxially fixed to one end of a second rotating shaft 1901 located outside the support plate 1801. A third rotating shaft 23 is mounted between the two support plates 1801, and the third rotating shaft 23 is rotatably connected to the support plate 1801. Both ends of the third rotating shaft 23 are connected to the support plate 1801 through bearings to ensure smooth rotation. An active bevel gear 2301 is provided at the end of the third rotating shaft 23, and the active bevel gear 2301 meshes with the driven bevel gear 1902 to realize power transmission. A handle 2302 is fixed on the third rotating shaft 23 and coaxially connected. The surface of the handle 2302 is provided with anti-slip texture. When the operator rotates the handle 2302, the active bevel gear 2301 and the driven bevel gear 1902 drive the second rotating shaft 1901 and the polygonal rotating rod 19 to rotate, compressing the torsion spring 20 and lifting the pressure plate 22, which facilitates the placement and removal of the circuit board 24 to be inspected. Release handle 2302, torsion spring 20 returns to its original position, driving pressure plate 22 to press the circuit board 24 to be inspected. The operation is convenient and requires no tools.

[0078] The cabinet 1 is equipped with a quick-connect aviation socket 25 that is electrically connected to the control component 4. The quick-connect aviation socket 25 is fixed to a bracket inside the cabinet 1 and is electrically connected to the control component 4, the LED light source 6, the photoabsorbing cell 7, and the reference photocell 8 of the optical path component. The quick-connect aviation socket 25 and the quick-connect aviation plug 16 are plugged and unplugged to achieve quick electrical connection between the placement cabinet 15 and the various components inside the cabinet 1, eliminating the need for manual wiring, greatly improving assembly and disassembly efficiency, and ensuring the reliability of the electrical connection to avoid signal distortion caused by poor contact.

[0079] Terminal block 17 is fixed to the upright plate 1503 of the placement cabinet 15 and electrically connected to quick-connect aviation plug 16. After the circuit board 24 under test is clamped in place, it is connected to terminal block 17 through wires to realize power supply and signal transmission of the circuit board 24 under test. Terminal block 17 adopts a standardized design and can be adapted to different specifications of circuit boards 24 under test, improving compatibility.

[0080] The control component 4 includes a touch screen and a main control module. The touch screen is embedded in the outer surface of the cabinet 1, and the main control module is integrated inside the cabinet 1 and electrically connected to the touch screen. The main control module is electrically connected to the LED light source 6, the photoabsorbing cell 7, the reference photocell 8, the servo motor 11, the electric linear module 12, the electromagnet 14, and the quick-connect aviation socket 25, respectively, to realize unified control and data interaction of each component.

[0081] Specifically, the control component 4 is the core control and data processing unit of this tester. Its internal modular design is clear, and the modules work together to realize the automatic calibration, batch testing and data management of the equipment. It includes the following modules and control logic.

[0082] The control component 4 is mainly composed of seven core modules: main control module, touch interaction module, signal acquisition module, drive control module, data processing module, alarm module, and data storage and export module. All modules are integrated on the same circuit board and realize data interaction through internal bus. The structure is compact and the operation is stable.

[0083] As the "core brain" of control component 4, the main control module uses a microcontroller as the main control chip. It has the advantages of multiple interfaces and high computing speed. It can simultaneously receive multiple signals and output control commands, and is responsible for coordinating the collaborative work of each module to ensure the orderly progress of the testing process. The main control module has a built-in watchdog circuit, which can automatically restart when the equipment malfunctions, improving the reliability of the equipment operation.

[0084] The touch interaction module consists of an embedded touch screen and a matching driving circuit. The touch screen is an industrial-grade resistive touch screen with a size of ≥7 inches, featuring scratch resistance, water resistance, and anti-interference capabilities, making it suitable for the harsh environment of industrial production lines. The touch screen supports a Chinese operating interface and can display information such as equipment operating status, detection parameters, calibration data, and detection results. It also supports operators to manually input parameters and issue control commands such as starting calibration, starting detection, and stopping operation, making operation convenient and intuitive.

[0085] The signal acquisition module mainly consists of a signal conditioning circuit and an A / D conversion circuit. It is responsible for acquiring the analog electrical signals transmitted by the absorption photovoltaic cell 7 and the reference photovoltaic cell 8, as well as the processed signals output by the circuit board under test 24. The signal conditioning circuit can amplify and filter the acquired weak electrical signals to remove external interference signals and ensure the accuracy of the signals. The A / D conversion circuit uses a 16-bit high-precision converter to convert the analog electrical signals into digital signals and transmit them to the main control module for further processing.

[0086] The drive control module includes multiple drive circuits, corresponding to the drive control of the LED light source 6, servo motor 11, electric linear module 12, and electromagnet 14, respectively. For the LED light source 6, the drive module can output a stable constant current drive signal to achieve a continuously adjustable brightness range of 0-100%, ensuring the stability of the light signal. For the servo motor 11, the drive module adopts pulse width modulation (PWM) control, which can accurately control the rotation angle and speed of the motor, with a positioning accuracy of ≤0.1mm, to achieve precise switching of the quantitative tube 9. For the electric linear module 12 and electromagnet 14, the drive module can output corresponding control signals to achieve the pushing, resetting, and adsorption fixation of the quantitative tube 9, with a response time of ≤100ms.

[0087] The data processing module has a built-in intelligent data processing algorithm with core functions including signal difference calculation, repeatability analysis, drift detection, and pass / fail determination. After receiving the digital signal transmitted by the main control module, it automatically calculates the difference between the absorbed light signal and the reference light signal, compares it with the preset standard threshold, analyzes the repeatability coefficient of variation of the signal (≤2%) and the drift (≤0.5% per hour), and then automatically determines whether the performance of the circuit board 24 under test is qualified. It also has a fault location algorithm, which can preliminarily determine the fault location of the circuit board 24 under test, such as signal acquisition unit failure or signal processing unit failure, based on abnormal signal characteristics such as no signal response or excessive signal fluctuation, and generate fault prompt information.

[0088] The alarm module consists of an audible and visual alarm circuit. When the equipment malfunctions, such as the quantitative tube 9 not being in place, abnormal light signal, poor electrical connection, or fault in the circuit board 24 under test, the main control module sends an alarm command. The alarm module emits an audible and visual alarm signal with a sound level ≥80dB and a flashing red alarm light. At the same time, the touch screen displays the specific alarm information to remind the operator to handle the situation promptly. The alarm signal can be automatically cleared by manual operation or after the fault is resolved.

[0089] The data storage and export module has a built-in high-capacity Flash storage chip with a storage capacity of ≥16GB, which can store at least 10,000 sets of test data, calibration data and equipment operation logs. The data storage time is ≥1 year and the data is not lost after power failure. It is also equipped with a USB interface to support data export function, which can export test results and calibration reports to a USB flash drive for easy data archiving, statistical analysis and quality traceability.

[0090] The control logic is as follows: S01 Initialization Phase: After the device is powered on, the control component 4 automatically starts the initialization program, performs self-tests on each module to check whether the touch screen, signal acquisition module, drive module, etc. are normal, and resets components such as LED light source 6 and servo motor 11 to ensure that the device is in the initial working state; after the self-test is passed, the touch screen displays the operation interface and prompts the operator to set the test parameters.

[0091] S02 Parameter Setting Stage: The operator inputs the model of the circuit board to be tested (24) and the test duration (range 1-30 minutes) via the touch screen. The signal threshold is preset according to the standard parameters of the water quality analyzer circuit board. The operator can manually adjust and calibrate parameters such as the light signal reference value corresponding to the standard solvent concentration. After the parameters are set, the main control module stores the parameters and issues a preheating command.

[0092] S03 Preheating and Calibration Stage: The main control module controls the LED light source 6 to preheat for 5 minutes to ensure stable light signal; at the same time, it controls the servo motor 11, electric linear module 12, and electromagnet 14 to work together to push the three sets of standard concentration quantitative tubes 9 into the quantitative tube insertion hole 501 in sequence. The signal acquisition module collects the absorption light signal and reference light signal corresponding to each standard concentration. The data processing module calculates the light signal difference, compares it with the preset reference value, automatically adjusts the brightness of the LED light source 6, completes the equipment calibration, and automatically stores the calibration data.

[0093] S04 Batch Testing Stage: After calibration, the main control module receives the testing instructions from the operator and controls the servo motor 11 and the electric linear module 12 to push the quantitative tube 9 of the detection concentration to the designated position; at the same time, it controls the LED light source 6 to continuously output a stable light signal, and the signal acquisition module synchronously acquires the electrical signals of the absorbing photocell 7, the reference photocell 8 and the circuit board 24 under test, and transmits them to the data processing module for analysis; during the testing process, the main control module monitors the operating status of each component in real time, and if any abnormality occurs, it immediately activates the alarm module and stops the testing.

[0094] S05 Data Processing and Result Output Stage: After the test is completed, the data processing module automatically generates a test report, which includes the circuit board number 24, test time, signal difference, repeatability, drift amount, pass / fail judgment result and fault prompts if any; the test report is simultaneously displayed on the touch screen and stored in the storage module, and can be exported by the operator via USB interface; after the test is completed, the main control module controls each component to reset, waiting for the next batch of tests.

[0095] In addition, the control component 4 also has a manual control mode. When the automation mode malfunctions, the operator can switch to manual mode via the touch screen to manually control the LED light source 6, the rotation of the servo motor 11, the movement of the electric linear module 12, etc., which facilitates equipment debugging and troubleshooting.

[0096] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described above, and the electrical connection should be completed by referring to the working sequence of each electrical component. The detailed connection methods are well-known technologies in the field. The above mainly introduces the working principle and process, and will not describe the electrical control.

[0097] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A rapid batch detection instrument for circuit board signals of a water quality analyzer, characterized in that: Includes cabinet (1), control components (4), optical path components and circuit board placement components; The touch screen of the control component (4) is embedded on the outer surface of the cabinet (1). The optical path component and the circuit board placement component are located inside the cabinet (1). A cabinet door (3) is provided on one vertical side of the cabinet (1). The circuit board placement component can be picked up and put in by opening the cabinet door (3). The optical path assembly includes a mounting base assembly, which includes a mounting base (5). The mounting base (5) has a central recessed quantitative tube insertion hole (501). One end of the quantitative tube insertion hole (501) is open and its interior is used to place a quantitative tube (9). The fixing base (5) is connected to a plurality of spaced light source mounting holes (502) on one side of the quantitative tube insertion hole (501), and the axial direction of the light source mounting holes (502) is arranged along the radial direction of the quantitative tube insertion hole (501); a plurality of absorption photocell mounting holes (503) are connected to the other side of the quantitative tube insertion hole (501), and the absorption photocell mounting holes (503) correspond one-to-one with the light source mounting holes (502) and are arranged coaxially; a reference photocell mounting hole (504) is also connected to the light source mounting hole (502). The LED light source (6) is installed in the opening of the outer wall of the fixing base (5) through the light source mounting hole (502); the photoabsorbing cell (7) is installed in the opening of the outer wall of the fixing base (5); and the reference photocell (8) is installed in the opening of the outer wall of the fixing base (5). The LED light source (6), the photoabsorbing cell (7), and the reference photocell (8) are all electrically connected to the control component (4). The circuit board placement assembly is used to place several circuit boards (24) to be inspected. The circuit board placement assembly includes quick-connect aviation plugs (16) and terminals (17) that are electrically connected to each other. The terminals (17) are electrically connected to the circuit boards (24) to be inspected. The cabinet (1) is equipped with a quick-connect aviation socket (25) that is electrically connected to the control component (4). The quick-connect aviation socket (25) is connected to the quick-connect aviation plug (16) by plugging and unplugging.

2. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 1, characterized in that: The optical path assembly also includes a quantitative tube placement assembly, which is disposed on the fixed base (5) at one end of the open end of the quantitative tube insertion hole (501); The quantitative tube placement assembly includes a placement rack (10), a servo motor (11), an electric linear module (12), and an electromagnet (14). The placement rack (10) is provided with several clamping components arranged in a ring array around its center line. A quantitative tube (9) is clamped and fixed in the middle of the clamping components. One of the clamping components is coaxially arranged with the quantitative tube insertion hole (501) of the fixed base (5). The servo motor (11) drives the connected placement rack (10) and causes the placement rack (10) to rotate around its center line; The electric linear module (12) is disposed on one side of the placement rack (10). The sliding part of the electric linear module (12) is fixedly connected to the electromagnet (14) through the push rod (13). The electromagnet (14) is arranged coaxially with the quantitative tube insertion hole (501). The electric linear module (12) drives the electromagnet (14) to reciprocate along the axial direction of the quantitative tube insertion hole (501). The servo motor (11) and electromagnet (14) are both electrically connected to the control component (4).

3. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 2, characterized in that: The placement rack (10) includes a first rotating shaft (1001) arranged coaxially with its center line; the clamping assembly includes a first arc-shaped clamping plate (1004) and a second arc-shaped clamping plate (1005) arranged coaxially and at relative intervals; two adjacent clamping assemblies are fixedly connected by a connecting plate (1003), and the connecting plate (1003) is fixedly connected to the first rotating shaft (1001) by a connecting rod (1002); The output shaft of the servo motor (11) is coaxially and fixedly connected to the first rotating shaft (1001).

4. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 3, characterized in that: The arc of the first arc-shaped clamping plate (1004) and the second arc-shaped clamping plate (1005) is 60° to 120°; the gap between the first arc-shaped clamping plate (1004) and the second arc-shaped clamping plate (1005) is used for the push rod (13) to pass through.

5. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 2, characterized in that: The quantitative tube (9) includes a tube body (901) and a top cover (902), the top cover (902) being detachably connected to the opening of the tube body (901); the top cover (902) is arranged facing the electromagnet (14), and the top cover (902) is made of magnetic material.

6. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 1, characterized in that: The circuit board placement assembly includes a placement cabinet (15), and the quick-connect aviation plug (16) and the wiring terminal (17) are fixed on the placement cabinet (15); a number of circuit board brackets are detachably connected to the placement cabinet (15), and the circuit board brackets are used to detachably install the circuit board to be inspected (24).

7. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 6, characterized in that: The placement cabinet (15) includes a base plate (1501) and upright plates (1503) fixedly connected to the upper sides of both sides of the base plate (1501); the upright plate (1503) has a hollowed-out open window (1504) in the middle; the end face of the upright plate (1503) has a number of connecting holes (1505) arranged at intervals in the vertical direction; the circuit board bracket is detachably connected to the placement cabinet (15) by fasteners passing through the connecting holes (1505); The bottom plate (1501) extends downward on both sides to form insert plates (1502), and the cabinet (1) is provided with a snap-fit ​​assembly inside, and the insert plate (1502) is snap-fitted with the snap-fit ​​assembly; A handle (1506) is fixedly installed on the side of the upright plate (1503) facing the cabinet door (3).

8. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 7, characterized in that: The circuit board support includes a support body (18), a polygonal rotating rod (19), a torsion spring (20), a T-shaped sliding sleeve (21), and a pressure plate (22). The bracket body (18) includes two spaced support plates (1801), which are fixedly connected by a U-shaped rod (1805) provided below. The end of the support plate (1801) is connected to a mounting plate (1804), which has a through hole and is connected to a fastener passing through the connection hole (1505). The support plate (1801) has a rotating groove (1802) recessed on its outer wall between the two end mounting plates (1804), and the support plate (1801) is provided with a rotating hole (1803) that is connected to the rotating groove (1802). The polygonal rotating rod (19) is rotatably disposed inside the rotating groove (1802). The two ends of the polygonal rotating rod (19) are coaxially fixed with a second rotating shaft (1901). The second rotating shaft (1901) is rotatably inserted into the rotating hole (1803). One of the second rotating shafts (1901) extends out of the support plate (1801) and is fitted with a torsion spring (20). The two ends of the torsion spring (20) are fixedly connected to the second rotating shaft (1901) and the support plate (1801) respectively. The horizontal part of the T-shaped sliding sleeve (21) is slidably sleeved above the polygonal rotating rod (19), and the end of its vertical part is slidably connected to a sliding rod (2201). The end of the sliding rod (2201) is fixedly connected to the pressure plate (22). The pressure plate (22) is used to press and fix the circuit board (24) to be inspected, which is placed on the support plate (1801).

9. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 8, characterized in that: A passive bevel gear (1902) is coaxially fixed at one end of the second rotating shaft (1901) located outside the support plate (1801). A third rotating shaft (23) is mounted between the two support plates (1801), and the third rotating shaft (23) is rotatably connected to the support plates (1801); the end of the third rotating shaft (23) is provided with an active bevel gear (2301), and the active bevel gear (2301) is meshed with a passive bevel gear (1902); A handle (2302) is fixed on the third rotating shaft (23) and connected coaxially.

10. The rapid batch detection instrument for circuit board signals of the water quality analyzer according to claim 7, characterized in that: The snap-fit ​​assembly includes a U-shaped baffle (26) fixed to the bottom plate of the cabinet (1), with the opening of the U-shaped baffle (26) facing the cabinet door (3); the inner sides of the two opposite end faces of the U-shaped baffle (26) are fixed with support plates (27) arranged at intervals from the bottom plate of the cabinet (1), and the support plate (27) at one end of the cabinet door (3) is an inclined guide plate (2701) arranged upward. The height gap between the support plate (27) and the bottom plate of the cabinet (1) is matched with the thickness of the insert plate (1502); the insert plate (1502) is inserted below the support plate (27), and the inner wall of the U-shaped baffle (26) abuts against the outer wall of the insert plate (1502).

Images