Electromechanical device for dust detection

Abstract

This utility model discloses an electromechanical device for dust detection, specifically relating to the field of electronic equipment technology. It includes a first housing, with a second housing positioned on top of the first housing. A conversion detection component is disposed between the first and second housings. The conversion detection component includes a turntable positioned between the first and second housings, with a plurality of detection cylinders on the top of the turntable. This utility model, by setting a rotatable turntable and multiple sets of detection cylinders, evenly distributes each independent detection cylinder along the circumference of the turntable. Each detection cylinder can carry different types of dust samples, and different specifications of glass slides can be replaced according to detection needs. It enables rapid switching of detection cylinders, allowing continuous detection of multiple types of samples without disassembling the device, effectively overcoming the limitations of existing devices that only perform single-sample detection, and is suitable for detection scenarios in multiple fields such as construction, industry, and environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of electronic equipment technology, and more specifically, to an electromechanical device for dust detection. Background Technology

[0002] Dust detection methods include the beta-ray method, light scattering method, and micro-oscillation balance method. The basic principle of the light scattering method is to use a laser source to illuminate the particles being measured, causing light scattering. A photoelectric conversion element receives the scattered light signal in a specific direction, including the number of scattered light events and the light intensity. The number of scattered light events indicates the number of particles, and the light intensity signal represents the particle size. This method can directly obtain the particle count.

[0003] Among them, the patent with announcement number CN221038601U discloses a dust detection electromechanical device including a base, a detection component and a protective component. The base has an installation cavity and an installation port on its bottom surface. A bottom cover is detachably connected to the base. The detection component includes a photoelectric conversion element installed on the base and a laser emitting element arranged above the photoelectric conversion element and spaced apart. The photoelectric conversion element and the laser emitting element are respectively connected to the control module signal. In use, this structure features a sliding groove, a pull ring that slides along the groove, and a protective cover between the pull ring and a second fixed ring. When not in use, the pull ring is lowered, causing the protective cover to enclose the laser emitting element and photoelectric conversion element, thus preventing dust accumulation. However, the detection components of this device are mostly fixed structures, limiting its ability to detect only a single type or type of dust sample. For example, switching between detecting "construction cement dust" and "industrial metal dust" (which have significantly different particle size distributions and optical properties, requiring different detection parameters) necessitates disassembling the device and replacing core detection components (such as the sample carrier structure and filter elements). This cumbersome and time-consuming operation cannot meet the needs of continuous detection in multiple scenarios. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an electromechanical device for dust detection, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a dust detection electromechanical device, including a first box, a second box on the top of the first box, and a conversion detection component between the first box and the second box; The conversion detection component includes a turntable disposed between a first box and a second box. The top of the turntable is provided with a plurality of detection cylinders, and the bottom of the inner cavity of each detection cylinder is provided with a glass slide. A PCB board is provided at the bottom of the inner cavity of the first box, a first photoelectric conversion element is provided at the top of the PCB board, a plurality of second photoelectric conversion elements are provided on the outside of the first photoelectric conversion element, and a first test head is provided at the top of the first photoelectric conversion element.

[0006] Optionally, in a possible implementation, a limiting cover is provided on the top of each of the plurality of second photoelectric conversion elements, and a second test head is provided on each of the limiting covers. A pin is provided on the PCB board, one end of the pin penetrates through the first housing and extends to the outside of the first housing, and an indicator light is provided at the end of the pin located on the outside of the first housing. A frame opening is provided through the second housing, and the frame opening is located on the top of the first test head. A drive motor for driving the turntable to rotate is provided on the PCB board, and the drive motor is mounted on the PCB board by a bracket. The first housing and the second housing are stacked and are threadedly connected. The technical effects and advantages of this utility model are as follows: By setting up a rotatable turntable and multiple sets of detection cylinders, each independent detection cylinder is evenly distributed along the circumference of the turntable. Each detection cylinder can carry different types of dust samples, and different sizes of glass slides can be replaced according to the detection requirements. It can realize rapid switching of detection cylinders and complete continuous detection of multiple types of samples without disassembling the device, effectively solving the limitations of single detection of existing devices, and is suitable for detection scenarios in multiple fields such as construction, industry, and environmental protection. By employing a combination of a first photoelectric conversion element and various second photoelectric conversion elements, both forward and lateral scattered light signals are simultaneously acquired. Combined with a high-precision focusing test head and an anti-glare glass slide, light interference is effectively reduced, and the comprehensiveness and accuracy of scattered light signal acquisition are improved. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0008] Figure 1 This is a front view of the overall structure of this utility model.

[0009] Figure 2 This is a side view of the overall structure of this utility model.

[0010] Figure 3 This is a schematic diagram of the conversion detection component of this utility model.

[0011] Figure 4 This is a schematic diagram of the turntable, detection cylinder, and glass slide of this utility model.

[0012] The attached figures are labeled as follows: 1. First box; 2. Second box; 3. Turntable; 4. Detection cylinder; 5. Glass slide; 6. First photoelectric conversion element; 7. First test head; 8. Second photoelectric conversion element; 9. Limiting cover; 10. Second test head; 11. PCB board; 12. Pin; 13. Indicator light; 14. Frame opening; 15. Drive motor. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] This embodiment discloses a dust detection electromechanical device, which aims to solve the problem that existing dust detection electromechanical devices can only perform single detections, cannot be replaced according to different material detection needs, and have poor ease of use.

[0015] like Figure 2 As shown, this dust detection electromechanical device mainly consists of a first housing 1, a second housing 2, and a conversion detection component disposed between the two. Both the first housing 1 and the second housing 2 are injection molded from ABS engineering plastic and are cylindrical in shape. They are stacked and connected by threads to ensure a stable connection and facilitate subsequent disassembly and maintenance.

[0016] The conversion detection component is the core structure of this device for achieving multi-scene detection, such as... Figure 2 , Figure 3 As shown, it specifically includes the following components: The turntable is made of polytetrafluoroethylene. The center of the turntable is fixedly connected to the output shaft of the drive motor 15 through a coupling, and can rotate 360° at a uniform speed with the operation of the drive motor 15.

[0017] Several detection cylinders 4 are evenly distributed along the circumference on the top of the turntable. The detection cylinders 4 are made of transparent quartz glass and are fixed to the preset mounting holes on the turntable by interference fit to ensure that there is no shaking or deviation during the rotation of the turntable.

[0018] Each detection cylinder 4 has a glass slide 5 placed horizontally at the bottom of its inner cavity. The glass slide 5 is made of high-transmittance borosilicate glass, which can reduce the interference of light reflection on detection accuracy during the detection process. The glass slide 5 is used to hold the dust sample to be tested and can be replaced at any time according to the detection needs. When replacing, simply remove the detection cylinder 4 from the turntable, which is easy to operate.

[0019] The PCB board 11 is located at the bottom of the inner cavity of the first box 1. The core control circuit, signal processing circuit and power management circuit of the device are integrated on the PCB board 11. The circuit layout follows the EMC electromagnetic compatibility design specifications, which can effectively reduce the impact of external electromagnetic interference on the detection signal.

[0020] The first photoelectric conversion element 6 is soldered and fixed on the PCB board 11. It is a silicon photodiode of type S-. Its main function is to receive the scattered light signal transmitted by the first test head 7 and convert the light signal into a corresponding electrical signal and transmit it to the signal processing circuit of the PCB board 11.

[0021] The first test head 7 is installed on top of the first photoelectric conversion element 6. It has a built-in focusing lens and a narrow band filter. The axis of the first test head 7 coincides with the axis of the detection cylinder 4 directly above it. This allows the scattered light generated by the dust sample in the detection cylinder 4 to be accurately focused onto the photosensitive surface of the first photoelectric conversion element 6, thereby improving the efficiency of light signal acquisition.

[0022] A plurality of second photoelectric conversion elements 8 are uniformly arranged around the outer side of the first photoelectric conversion element 6. The second photoelectric conversion elements 8 are silicon photodiodes of model BPW. The second photoelectric conversion elements 8 are used for auxiliary detection and can collect scattered light signals from different angles. They complement the first photoelectric conversion element 6 and improve the comprehensiveness and accuracy of the detection data.

[0023] Each second photoelectric conversion element 8 is topped with a limiting cover 10, which is made of aluminum alloy and has a blackened inner wall to reduce light reflection. A second test head 10 is mounted on top of the limiting cover 10. The structure of the second test head 10 is the same as that of the first test head 7. Its axis coincides with the axis of the corresponding second photoelectric conversion element 8 and forms an angle with the side wall of the adjacent detection cylinder 4, which can accurately collect the lateral scattered light signal of the dust sample inside the detection cylinder 4.

[0024] The drive motor 15 is fixedly mounted on the PCB board 11 by an L-shaped metal bracket. The stepper motor with model number BYJ- is selected. The drive motor 15 is controlled by the stepper motor drive chip on the PCB board 11. The rotation speed and rotation angle can be adjusted according to the detection requirements to achieve precise switching of the detection cylinder 4.

[0025] Several pins 12 are soldered to one side of the PCB board 11. Pins 12 are PH.-P type terminals, one end of which passes through a pre-drilled hole on the side wall of the first housing 1 and extends to the outside of the first housing 1. This is used to achieve electrical connection between the device and external control equipment such as a PLC or host computer, transmitting power, control signals, and detection data. Several indicator lights 13 are correspondingly arranged at the outer end of the pins 12. The indicator lights 13 are surface-mount LEDs of type [type missing], with three colors: red, green, and yellow. The red light indicates the power status, the green light indicates the detection status, and the yellow light indicates the fault status, allowing operators to monitor the device's operation in real time.

[0026] like Figure 1 As shown, a frame opening 14 is provided through the top center of the second box 2, the axis of which coincides with the axis of the first test head 7 and is located directly above the first test head 7. A dustproof sponge is pasted on the inner edge of the frame opening 14, which can effectively prevent external dust from entering the device and contaminating the detection components, while not affecting the light incident of the external light source during the detection process; The specific working principle is as follows: according to the testing requirements, different types of dust samples are dropped onto the glass slides 5 at the bottom of each testing cylinder 4. After the samples are stable, the testing cylinder 4 is installed back into the corresponding mounting holes of the turntable.

[0027] An external control device, such as a host computer, sends a start signal to the PCB board 11. The power management circuit on the PCB board 11 then starts working, supplying power to the various electrical components. At this time, the red light in the indicator light 13 remains constantly lit, indicating that the power supply is normal. Simultaneously, the drive motor 15 starts under the control of the stepper motor driver chip, driving the turntable to rotate and rotate the first detection cylinder 4 to the detection position between the first test head 7 and the second test head 10. At this time, the green light in the indicator light 13 begins to flash, indicating that the device has entered the detection preparation state.

[0028] An external laser emitter emits a laser beam through the frame opening 14 on the second housing 2 towards the dust sample inside the detection cylinder 4. The laser beam irradiates the dust particles, generating scattered light. The forward scattered light is collected by the first test head 7 and focused onto the photosensitive surface of the first photoelectric conversion element 6. The first photoelectric conversion element 6 converts the forward scattered light signal into an electrical signal, which is then transmitted to the signal processing circuit on the PCB board 11. The side scattered light is collected by each of the second test heads 10 and focused onto the photosensitive surface of the corresponding second photoelectric conversion element 8. The second photoelectric conversion element 8 converts the side scattered light signal into an electrical signal, which is also transmitted to the signal processing circuit.

[0029] The signal processing circuit on PCB board 11 amplifies, filters, and performs AD conversion on the electrical signals transmitted from the first photoelectric conversion element 6 and the second photoelectric conversion element 8. It calculates the number of particles in the dust sample based on the number of scattered light events and detects the particle size based on the light intensity signal. After processing, the detection data is transmitted to an external control device through pin 12, and the green light in indicator light 13 changes from flashing to solid, indicating that the detection of this group of samples is complete.

[0030] After a set of samples has been tested, the PCB board 11 controls the drive motor 15 to rotate the turntable, switching the next detection cylinder 4 to the detection position. The above detection process is repeated until all samples in the detection cylinders 4 have been tested. After all tests are completed, the green light in the indicator light 13 remains constantly lit. If a fault occurs during the test, the yellow light in the indicator light 13 will flash or remain constantly lit according to the fault type, and a fault signal will be sent to the external control device through pin 12.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dust detection electromechanical device, comprising a first housing (1), characterized in that: A second box (2) is provided on the top of the first box (1), and a conversion detection component is provided between the first box (1) and the second box (2); The conversion detection component includes a turntable (3) disposed between the first box (1) and the second box (2). The top of the turntable (3) is provided with a plurality of detection cylinders (4), and the bottom of the inner cavity of each detection cylinder (4) is provided with a glass slide (5). The bottom of the inner cavity of the first box (1) is provided with a PCB board (11), the top of the PCB board (11) is provided with a first photoelectric conversion element (6), a plurality of second photoelectric conversion elements (8) are provided on the outside of the first photoelectric conversion element (6), and the top of the first photoelectric conversion element (6) is provided with a first test head (7).

2. The electromechanical device for dust detection according to claim 1, characterized in that: Each of the second photoelectric conversion elements (8) is provided with a limiting cover (9) on its top, and each limiting cover (9) is provided with a second test head (10).

3. The electromechanical device for dust detection according to claim 1, characterized in that: The PCB board (11) is provided with pins (12), one end of the pins (12) passes through the first box (1) and extends to the outside of the first box (1), and an indicator light (13) is provided at the end of the pins (12) located outside the first box (1).

4. The electromechanical device for dust detection according to claim 1, characterized in that: The second box (2) has a through opening (14), which is located at the top of the first test head (7).

5. The electromechanical device for dust detection according to claim 1, characterized in that: The PCB board (11) is provided with a drive motor (15) for driving the turntable (3) to rotate. The drive motor (15) is mounted on the PCB board (11) by a bracket.

6. The electromechanical device for dust detection according to claim 1, characterized in that: The first box (1) and the second box (2) are stacked and connected by threads.

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