A material moisture content detection system

Abstract

The utility model discloses material moisture content detection system, shell, light -transmitting plate, light source emission module, light source receiving module, control unit, light source emission module includes the light source subassembly and lens that set up in proper order, be equipped with the light inlet and the light outlet on the shell, the light -transmitting plate covers on the light inlet, the light outlet, light source emission module, light source receiving module set up in the same side of light -transmitting plate, and material is placed in the other side of light -transmitting plate, and the lens corresponds with the light outlet, and light source receiving module corresponds with the light inlet. The lens focuses the detection light source that light source subassembly emits and is incident on the light -transmitting plate, and the light -transmitting plate transmits the detection light source after focusing to material, light source receiving module receives the light information of measuring of material reflection and will light information of measuring change into digital information, and control unit obtains material moisture content according to the digital information of receiving. Through light -transmitting plate, optical detection element and material physics are separated, avoid polluting or damaging optical element, and keep the stability of optical path simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of moisture content detection technology, and specifically to a material moisture content detection system. Background Technology

[0002] Fine aggregate, usually referring to sand or construction sand with small particle size, is the main aggregate in commonly used building materials such as concrete and mortar. Its moisture content directly affects the water-cement ratio. If the moisture content is too high, excess water will evaporate and form voids on the concrete surface, reducing the concrete strength. It will also lead to poor workability and durability of the concrete, seriously affecting the performance of building materials. Therefore, the moisture content testing of fine aggregate is an important part of civil engineering, building materials, geological exploration and other fields.

[0003] The standard method for testing the moisture content of fine aggregates involves drying the material and collecting the weights before and after drying to calculate the moisture content. However, this method is time-consuming, labor-intensive, and has a long cycle. Commonly used rapid testing methods include the resistance method and the near-infrared method. The resistance method measures the moisture content of the material by utilizing the relationship between the material's moisture content and its resistance. However, this method requires contact with the material, has high requirements for material sampling, and contact measurement can shorten the lifespan of the sensor. The near-infrared method, on the other hand, utilizes the principle that electromagnetic waves between visible and mid-infrared light are absorbed by water molecules. It determines the moisture content by analyzing the changes in near-infrared energy at specific wavelengths. This method is a non-contact measurement, allows for continuous measurement, and provides rapid analysis.

[0004] The structure of near-infrared detection systems on the market is generally quite complex and inconvenient to carry. Furthermore, since there is no shielding between the material and the optical detection element, the optical detection element is exposed to a humid environment for a long time during the detection process. In addition, some materials may generate dust, all of which will affect the performance of the optical detection element. Utility Model Content

[0005] The purpose of this utility model is to at least partially solve one of the technical problems in the related art. In view of this, a material moisture content detection system is provided, comprising: a housing, a light-transmitting plate respectively installed in the housing, a light source emitting module, a light source receiving module, and a control unit electrically connected to the light source receiving module. The light source emitting module includes a light source component and a lens arranged in sequence.

[0006] The housing is provided with a light inlet and a light outlet, the light-transmitting plate covers the light inlet and the light outlet, the light source emitting module and the light source receiving module are arranged on the same side of the light-transmitting plate, the material is placed on the other side of the light-transmitting plate, the lens corresponds to the light outlet, and the light source receiving module corresponds to the light inlet.

[0007] The lens focuses the detection light emitted by the light source assembly onto the light-transmitting plate, and the light-transmitting plate transmits the focused detection light onto the material; the light source receiving module receives the light information to be measured reflected by the material and converts the light information to be measured into digital information; the control unit obtains the moisture content of the material based on the received digital information.

[0008] Compared with the prior art, the technical solution of this utility model has the following advantages: the optical detection element is physically separated from the material by the light-transmitting plate, avoiding contamination or damage to the optical element, while maintaining the stability of the optical path; the light outlet and the lens are precisely aligned to ensure efficient beam focusing; the light inlet and the light source receiving module are correspondingly set, which optimizes the receiving efficiency of reflected light; the structure is simple, which simplifies the system structure, makes it easy to carry, and improves the detection accuracy.

[0009] According to one example of the present invention, the light source emitting module further includes a light-shielding element located between the light source assembly and the lens.

[0010] According to an example of the present invention, the housing is provided with a partition to divide the internal space into a control room and a material room. The light inlet and light outlet are provided on the partition, the light-transmitting plate is installed on the partition, the material is placed in the material room, and the light source emitting module, the light source receiving module, and the control unit are installed in the control room.

[0011] According to one example of the present invention, the housing is provided with an opening communicating with a material chamber, and a material box for placing materials is slidably mounted on the opening.

[0012] According to one example of the present invention, the light-transmitting plate is located in the material chamber.

[0013] According to one example of this invention, the lens is a plano-convex lens.

[0014] According to one example of the present invention, the light-transmitting plate is a flat glass.

[0015] According to one example of the present invention, the housing is further equipped with an output unit electrically connected to the control unit for outputting the moisture content of the material to the user.

[0016] According to one example of the present invention, the control room is equipped with a heat dissipation device.

[0017] The following benefits can be obtained by adopting this technical solution:

[0018] (1) A non-contact detection method is adopted. A light-transmitting plate is used to physically isolate the material from the optical measurement components such as the light source emitting module and the light source receiving module, so as to avoid material contamination or damage to the optical measurement components and extend the service life of the optical measurement components. At the same time, it avoids the deviation of the light path directly incident from the lens due to the unevenness of the material surface, maintains the stability of the light path, has a simple structure, simplifies the system structure, is easy to carry, improves the detection accuracy, and has a wider range of applications.

[0019] (2) By setting a cylindrical light shield to block the space between the light source component and the lens, the interference of stray light from the light source component on the lens can be reduced, thus avoiding affecting the detection accuracy and reducing signal noise caused by ambient light interference.

[0020] (3) By sliding the material box on the housing, the optical distance between the material and the light source emitting module and the light source receiving module is ensured, and the material is easy to take out or put in, making it more convenient to use.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a material moisture content detection system according to an embodiment of the present invention;

[0024] Figure 2 This is a structural principle block diagram of a material moisture content detection system according to an embodiment of the present invention;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure when the material box is pulled out from the upper part of the shell;

[0026] Figure 4 yes Figure 1 A sectional view;

[0027] Figure 5 This is a structural diagram of the control room;

[0028] Figure 6 This is the circuit schematic of the drive circuit;

[0029] Figure 7This is the circuit schematic of a signal processing circuit.

[0030] The attached figures are labeled as follows:

[0031] 1. Housing; 1a. Light outlet; 1b. Light inlet; 1c. Opening; 2. Light-transmitting plate; 3. Control unit; 4. Light source assembly; 5. Lens; 6. Light source receiving module; 7. Light shield; 8. Output unit; 9. Partition; 91. Sleeve; 10. Material; 11. Control room; 12. Material chamber; 13. Heat dissipation device; 131. Fan; 132. Heat dissipation fins; 133. Heat dissipation holes; 14. Material box; 15. Handle; 16. Power module; 17. Communication unit; 18. Temperature sensor; 19. Drive circuit; 20. Signal processing circuit; 21. Control board. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] Please see Figure 4 As shown, this utility model provides a material moisture content detection system, which is mainly used for detecting fine aggregates. It includes: a housing 1, a light-transmitting plate 2 installed in the housing 1, a light source emitting module, a light source receiving module 6, and a control unit 3 electrically connected to the light source receiving module 6. The light source emitting module includes a light source assembly 4 and a lens 5 arranged in sequence.

[0034] The housing 1 is also provided with a light inlet 1b and a light outlet 1a. The light-transmitting plate 2 covers the light inlet 1b and the light outlet 1a. The light source emitting module and the light source receiving module 6 are located on the same side of the light-transmitting plate 2. The material 10 is placed on the other side of the light-transmitting plate 2. The lens 5 corresponds to the light outlet 1a, and the detection part of the light source receiving module 6 corresponds to the light inlet 1b.

[0035] Lens 5 focuses the detection light emitted by light source assembly 4 onto light-transmitting plate 2, and light-transmitting plate 2 transmits the focused detection light onto material 10; light source receiving module 6 receives the light information to be measured reflected from the surface of material 10 and converts the light information to be measured into digital information; control unit 3 obtains the moisture content of material based on the received digital information.

[0036] In this embodiment, the light-transmitting plate 2 is a flat glass, especially a flat tempered glass, which can ensure light transmittance while facilitating cleaning. One light-transmitting plate 2 is provided. The lens 5 is a plano-convex lens, with the convex surface of the plano-convex lens facing the light outlet 1a and abutting against the light-transmitting plate 2, and the flat surface of the plano-convex lens facing the light source assembly 4. The lens 5 converts multiple point light sources into parallel light. The parallel light is incident perpendicularly on the light-transmitting plate 2 and then emitted perpendicularly. Due to the uneven surface of the material 10, the light incident obliquely on the surface of the material 10 is reflected and received by the detection part of the light source receiving module 6, which can efficiently focus and diverge the beam, increase the energy density of the incident light, enhance the irradiation intensity of the surface of the material 10, and thus improve the reception intensity of the reflected signal.

[0037] In this embodiment, the light source assembly 4 includes a lamp panel and at least one infrared light source mounted on the lamp panel, such as... Figure 6 As shown, the control unit 3 drives the infrared light source through the drive circuit 19. The drive circuit 19 is mounted on the control board 21 where the control unit 3 is located. The drive circuit 19 converts the duty cycle signal into an analog voltage, and drives the infrared light source to emit infrared light through constant current. Figure 7 As shown, a signal processing circuit 20 is also provided between the light source receiving module 6 and the control unit 3. This circuit filters out noise, amplifies the signal, and adjusts the level to convert the optical signal into an electrical signal for analysis by the control unit 3 to obtain the material's moisture content. The light source receiving module 6 is an infrared detector.

[0038] To reduce stray light interference from the light source assembly 4 to the lens 5, the light source emitting module also includes a light-shielding member 7 located between the light source assembly 4 and the lens 5, which is situated within the housing 1. In this embodiment, the light-shielding member 7 is an integrally formed light-shielding cylinder. In another embodiment, the light-shielding member 7 may also be composed of a split structure.

[0039] like Figure 4 , 5As shown, a partition 9 is provided inside the housing 1 to divide the internal space into a control chamber 11 and a material chamber 12. The control chamber 11 and the material chamber 12 are at least partially separated, with the control chamber 11 located above the material chamber 12. This physical isolation between the control chamber 11 and the material chamber 12 prevents the material 10 from contaminating the optical detection elements. An inlet 1b and an outlet 1a are located on the partition 9. Incident light enters the material chamber 12 from the outlet 1a of the lens 5 in the control chamber 11, and reflected light enters the detection section of the light source receiving module 6 from the material 10 in the material chamber 12 via the inlet 1b. A light-transmitting plate 2 is installed on the partition 9 to cover the inlet 1b and outlet 1a, ensuring that the optical path transmission is not affected by the partition, balancing protection and detection reliability. The material 10 is placed inside the material chamber 12, while the light source emitting module, the light source receiving module 6, and the control unit 3 are installed inside the control chamber 11. The light-transmitting plate 2 physically isolates the material from optical measurement components such as the light source emitting module and the light source receiving module 6, preventing material contamination or damage to the optical measurement components and extending the service life of the optical measurement components.

[0040] In this embodiment, a sleeve 91 is provided in the middle of the partition 9 to form a accommodating space for installing the light source emitting module. The light outlet 1a is located inside the sleeve 91. The lens 5 is placed at the bottom of the sleeve 91. The light shield 7 is accommodated inside the sleeve 91 and located on the lens 5. The light source assembly 4 is placed on top of the light shield 7 and installed on the sleeve 91.

[0041] like Figure 1 , 3 As shown, the housing 1 has an opening 1c communicating with the material chamber 12. A material box 14 for placing material 10 is slidably installed on the opening 1c. The material box 14 can extend at least partially out of the material chamber 12 relative to the opening 1c or extend at least partially into the material chamber 12 relative to the opening 1c. The material box 14 and the housing 1 are respectively provided with handles 15. The pull-out material box 14 can reduce the interference of the external environment on the material detection, and the handles 15 on the housing 1 facilitate handling. The opening 1c is located at the bottom front side of the housing 1, and the top of the material box 14 is open facing the light outlet 1a.

[0042] like Figure 1 , 2 As shown in Figure 5, the housing 1 is also equipped with an output unit 8 electrically connected to the control unit 3. The housing 1 also houses a heat dissipation device 13, a power module 16, and a temperature sensor 18. The output unit 8 and the heat dissipation device 13 are located on the control chamber 11, and the power module 16 is mounted on the control board 21. The housing 1 is also equipped with a communication unit 17 electrically connected to the control unit 3, facilitating real-time communication with external production equipment (such as a concrete production system) and providing real-time data support for concrete mix proportioning and batching.

[0043] In this embodiment, the output unit 8 is used to output the material moisture content to the user, specifically at least one of a display screen and a voice module, to facilitate the user's quick acquisition of test results, suitable for on-site rapid testing scenarios. The heat dissipation device 13 is used to cool at least the light source emitting module, the light source receiving module 6, and the control unit 3. It includes a fan 131 installed at least in the control chamber 11, heat dissipation fins 132 installed on the control board 21 for cooling the power transistors of the drive circuit 19, and heat dissipation holes 133 provided on at least one side wall of the control chamber 11, achieving targeted heat dissipation from multiple dimensions to improve heat dissipation efficiency, ensuring that the electronic components in the control chamber 11 operate at a suitable temperature, and avoiding overheating that could affect the propagation of the light path and circuit performance. The temperature sensor 18 collects the temperature of at least the control board 21 to promptly control the operating state of the fan 131 to actively cool the control board 21, such as starting or stopping the fan 131, or increasing or decreasing the fan speed.

[0044] The output unit 8, fan 131, temperature sensor 18 and power module 16 are electrically connected to the control unit 3, and the power module 16 is electrically connected to the light source assembly 4, light source receiving module 6, output unit 8, fan 131, temperature sensor 18 and control unit 3.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0048] For those skilled in the art, various changes and modifications will undoubtedly be apparent after reading the above description. Therefore, the appended claims should be considered as covering all changes and modifications that encompass the true intent and scope of this utility model. Any and all equivalent scope and content within the scope of the claims should be considered as still falling within the intent and scope of this utility model.

Claims

1. A material moisture content detection system, characterized in that, include: The system comprises a housing, a light-transmitting plate installed inside the housing, a light source emitting module, a light source receiving module, and a control unit electrically connected to the light source receiving module. The light source emitting module includes a light source assembly and a lens arranged sequentially. The housing is provided with a light inlet and a light outlet, the light-transmitting plate covers the light inlet and the light outlet, the light source emitting module and the light source receiving module are arranged on the same side of the light-transmitting plate, the material is placed on the other side of the light-transmitting plate, the lens corresponds to the light outlet, and the light source receiving module corresponds to the light inlet. The lens focuses the detection light emitted by the light source assembly onto the light-transmitting plate, and the light-transmitting plate transmits the focused detection light onto the material; the light source receiving module receives the light information to be measured reflected by the material and converts the light information to be measured into digital information; the control unit obtains the moisture content of the material based on the received digital information.

2. The material moisture content detection system as described in claim 1, characterized in that: The light source emitting module also includes a light-shielding component located between the light source assembly and the lens.

3. The material moisture content detection system as described in claim 1, characterized in that: The housing is equipped with a partition to divide the internal space into a control room and a material room. The light inlet and light outlet are located on the partition, the light-transmitting plate is installed on the partition, the material is placed in the material room, and the light source emitting module, the light source receiving module, and the control unit are installed in the control room.

4. The material moisture content detection system as described in claim 3, characterized in that: The housing has an opening that communicates with the material chamber, and a material box for placing materials is slidably installed on the opening.

5. The material moisture content detection system as described in claim 3, characterized in that: The light-transmitting panel is located inside the material chamber.

6. The material moisture content detection system according to any one of claims 1-5, characterized in that: The lens is a plano-convex lens.

7. The material moisture content detection system according to any one of claims 1-5, characterized in that: The light-transmitting panel is a flat glass.

8. The material moisture content detection system according to any one of claims 1-5, characterized in that: The housing is also equipped with an output unit that is electrically connected to the control unit, which is used to output the moisture content of the material to the user.

9. The material moisture content detection system according to any one of claims 1-5, characterized in that: A heat dissipation device is installed on the housing.

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