An environmental monitoring device for measuring windblown sand content

Abstract

This invention discloses an environmental monitoring device for measuring windblown sand content, belonging to the technical field of environmental monitoring equipment. It includes a sand collection component comprising a top plate with several baffles connected to its bottom surface. These baffles are arranged in a circular array around the central axis of the top plate, forming a V-shaped sand collection channel between adjacent baffles. The front end of the V-shaped sand collection channel forms a sand inlet, and the bottom end forms a sand outlet. A sand collecting hopper has an upper interface at the top and a lower sand outlet at the bottom, with the upper interface connecting to the sand outlet. The lower part is circular. A measuring cup includes a cup body with a sealed bottom and an open top, the cup body fitting over the lower sand outlet through the open top, and a drain outlet at the bottom of the cup body. This invention overcomes the shortcomings of existing technologies, such as inaccurate weighing due to sand sample moisture content, low efficiency of natural air drying, poor adaptability to the field, and data distortion.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring equipment technology, specifically to an environmental monitoring device for measuring wind and sand content. Background Technology

[0002] Aeolian activity is a core observation target for ecological environment monitoring and aeolian disaster prevention in arid and semi-arid regions. Aeolian dust content, as a key indicator for quantifying aeolian intensity, assessing wind erosion, and guiding ecological governance, is crucial for long-term, continuous, and accurate monitoring, which is essential for meteorological early warning, engineering protection, and desertification control. Currently, aeolian dust content monitoring equipment based on the gravimetric method has become the mainstream technical solution for field environmental monitoring due to its intuitive principle and traceable data.

[0003] Existing windblown sand content measurement equipment mostly consists of a sand collection mechanism, a flow guiding mechanism, a weighing module, and a data acquisition unit. It achieves automatic monitoring of windblown sand flux and cumulative content by directionally capturing sand particles in the environment and weighing them in real time. However, such equipment generally suffers from significant technical shortcomings in complex field environments with high humidity, condensation, and precipitation. The lack of effective online drying for sand samples significantly reduces weighing accuracy. Collected sand samples easily absorb environmental moisture, condense dew, or mix with rainwater, resulting in weighing results that include the added mass of moisture and cannot reflect the true dry sand mass. There are no dedicated drying facilities in the field, and natural air drying is relied upon, which is inefficient and time-consuming, making it difficult to meet the needs of high-frequency automatic monitoring. This results in systematically inflated monitoring data and long-term series distortion.

[0004] Poor adaptability to the field makes it difficult to guarantee data reliability. Most sandstorm monitoring is deployed in remote, unattended areas, resulting in high manual maintenance costs and long cycles. Existing equipment lacks sufficient moisture-proof, dehumidification, and pre-drying capabilities. The diurnal temperature range and precipitation can easily cause fluctuations in the moisture content of sand samples, further amplifying weighing errors. This makes it impossible to meet the requirements of high-precision, long-cycle, and fully automated sandstorm environmental monitoring.

[0005] In summary, existing aeolian sand content measurement equipment lacks efficient online drying treatment for collected sand samples, making it difficult to eliminate the interference of moisture on the weighing results, resulting in low weighing accuracy, poor data reliability, and insufficient automation and field adaptability.

[0006] In view of the above, this application is hereby submitted. Summary of the Invention

[0007] The purpose of this invention is to provide an environmental monitoring device for measuring windblown sand content, so as to solve the problems mentioned in the background art.

[0008] To solve the above-mentioned technical problems, the present invention provides an environmental monitoring device for measuring windblown sand content, comprising: A sand collection assembly includes a top plate with a plurality of baffles connected to its bottom surface. The baffles are arranged in a circular array around the central axis of the top plate, and a V-shaped sand collection channel is formed between two adjacent baffles. The front end of the V-shaped sand collection channel forms a sand inlet, and the bottom end of the V-shaped sand collection channel forms a sand outlet. A sand collecting hopper, the sand collecting hopper having an upper interface at the top and a lower sand outlet at the bottom, the upper interface being connected to the sand outlet, and the lower part being circular; A measuring cup includes a cup body with a sealed bottom and an open top. The cup body is fitted onto the outside of the drain outlet through the open top. A drain outlet is provided at the bottom of the cup body. A conical filter funnel is installed on the inner bottom wall of the cup body. The conical filter funnel is located above the drain outlet, and the bottom end of the conical filter funnel is adapted to the size of the drain outlet. A grate plate is connected below the measuring cup, and the grate plate is used to prevent sand from entering and to filter water. A weighing sensor is connected to the bottom of the measuring cup, and the weighing sensor is used to monitor the amount of sand collected in real time.

[0009] Furthermore, the measuring cup also includes a dehumidification component disposed inside it. The dehumidification component includes an annular ultrasonic transducer connected to the bottom wall of the cup body. An insulating liner is also installed on the inner bottom wall of the cup body. Several conductive rings are installed on the outer wall of the insulating liner, and the spacing between each conductive ring is 0.1 mm to 0.3 mm. Several metal wires extending along its axial direction are installed on the top surface of the annular ultrasonic transducer. The metal wires are resistance heating wires. A plurality of conductive rings are electrically connected to a power supply module and a control module to form a humidity detection circuit. Adjacent conductive rings are electrically connected to different electrodes of the humidity detection circuit. The metal wires are electrically connected to a heating power supply branch and a control module, respectively. The heating power supply branch and the humidity detection circuit are independent of each other. When the sand sample in the cup contains moisture, the moisture causes adjacent conductive rings to conduct to each other, and the resistance of the humidity detection circuit changes with the humidity of the sand sample. The control module is electrically connected to the ultrasonic transducer and the heating power supply branch, respectively. The control module is used to control the ultrasonic transducer to drive the metal wire to vibrate at high frequency according to the signal of the humidity detection circuit, and to control the heating power supply branch to energize the metal wire so that the metal wire generates Joule heat to heat and dry the sand sample in the cup.

[0010] Furthermore, the top surface of the grate is also provided with a cup holder for fixing the measuring cup. The cup holder includes a cylindrical seat fixed to the top surface of the grate. The bottom surface of the cylindrical seat has a through hole corresponding to the drain outlet. The weighing sensor is installed on the inner bottom wall of the cylindrical seat, and the bottom surface of the cup body is in contact with the top surface of the weighing sensor. A locking groove extending axially is provided on the side wall of the cup body. A locking rod that slides radially is provided on the side wall of the cylindrical seat. A connecting spring is sleeved on the outside of the locking rod. One end of the connecting spring is fixed to the outside of the locking rod, and the other end is fixed to the outside of the cylindrical seat. Under the initial elastic force, the locking rod is pushed into the inside of the locking groove.

[0011] Furthermore, a flexible tube is installed on the top surface of the through hole, and the top end of the flexible tube is attached to the bottom end face of the drain outlet.

[0012] Furthermore, a humidity sensor is installed inside the cup body, and both the humidity sensor and the weighing sensor are electrically connected to an external power source via wires.

[0013] Furthermore, the opening width of the V-shaped sand collection channel gradually decreases from the front end to the bottom end, the baffle is a flat plate structure, and the rear ends of the baffles are connected to each other.

[0014] Furthermore, a cover plate is installed on the top surface of the top plate, and the coverage area of ​​the cover plate is larger than that of the top plate.

[0015] Furthermore, a small weather station for monitoring meteorological parameters is installed on the top of the cover plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention forms a dual dehumidification system by using a conical filter bucket for initial water filtration and metal wire vibration heating for deep drying. Combined with a conductive ring and a humidity sensor for dual-mode humidity detection, it achieves automatic identification of sand sample humidity and automatic control of drying, completely eliminating the interference of moisture content on weighing results, ensuring the authenticity and reliability of monitoring data, and solving the core defect of existing equipment that causes weighing distortion due to water content in sand samples.

[0017] 2. This invention, through structural design such as pit burial and fixing, rainproof cover plate, and cup holder locking the measuring cup, combined with integrated sand collection, water filtration, drying, weighing and meteorological monitoring functions, has a compact structure and strong stability. It can achieve long-term, fully automatic monitoring of wind and sand content without manual intervention, greatly reducing field maintenance costs and adapting to the complex field environment of arid and semi-arid regions. Attached Figure Description

[0018] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a side view of the structure of the present invention; Figure 3 This is a schematic diagram of the sand collection component in this invention; Figure 4 This is a schematic diagram of the sand collection bucket structure in this invention; Figure 5 This is a schematic diagram of the connection structure between the grate and the measuring cup in this invention; Figure 6 This is a schematic cross-sectional view of the measuring cup and cup holder in this invention.

[0019] In the diagram: 1. Top plate; 2. Baffle; 3. Sand inlet; 4. Sand outlet; 5. Cover plate; 6. Mini weather station; 7. Sand collection hopper; 71. Upper interface; 72. Lower sand outlet; 8. Measuring cup; 81. Cup body; 82. Drain; 83. Conical filter; 84. Annular ultrasonic transducer; 85. Insulating liner; 86. Conductive ring; 87. Humidity sensor; 88. Metal wire; 9. Grate; 10. Cup holder; 101. Cylindrical seat; 102. Through hole; 103. Flexible tube; 104. Locking groove; 105. Locking rod; 106. Connecting spring; 11. Weighing sensor. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-6 The present invention provides a technical solution: an environmental monitoring device for measuring wind and sand content, comprising; The sand collection component includes a top plate 1, the bottom surface of which is connected to several baffles 2. The baffles 2 are arranged in a circular array around the central axis of the top plate 1, and a V-shaped sand collection channel is formed between two adjacent baffles 2. The front end of the V-shaped sand collection channel forms a sand inlet 3, and the bottom end of the V-shaped sand collection channel forms a sand outlet 4. The sand collecting hopper 7 has an upper interface 71 at the top and a lower sand outlet 72 at the bottom. The upper interface 71 is connected to the sand outlet 4, and the lower part is circular. The measuring cup 8 includes a cup body 81 with a sealed bottom and an open top. The cup body 81 is fitted onto the outside of the drain outlet 72 through the open top. The bottom of the cup body 81 has a drain outlet 82. A conical filter 83 is installed on the inner bottom wall of the cup body 81. The conical filter 83 is located above the drain outlet 82, and the bottom end of the conical filter 83 is adapted to the size of the drain outlet 82. The grate plate 9 is connected below the measuring cup 8 and is used to prevent sand from entering and filter water. The weighing sensor 11 is connected to the bottom of the measuring cup 8 and is used to monitor the amount of sand collected in real time.

[0022] Specifically, windblown sand enters the V-shaped sand collection channel through the sand inlet 3, is guided by the baffle 2 to the sand outlet 4, and then flows into the measuring cup 8 through the sand collection hopper 7. After entering the cup 81, the sand first falls onto the conical filter hopper 83 for water filtration. The free water is discharged through the drain 82, while the sand remains in the cup 81 and is weighed in real time by the weighing sensor 11. This structure achieves directional collection and centralized guidance of windblown sand, resulting in high sand collection efficiency. The conical filter hopper 83 can pre-filter out free water, reducing the impact of water on weighing from the source. The grate 9 achieves sand blocking and water separation, preventing sand loss. The weighing sensor 11 monitors in real time, realizing automated and continuous measurement of windblown sand content, effectively solving the problems of low sand collection efficiency, easy sand loss, and inability to monitor in real time in existing equipment.

[0023] As a technical optimization of the present invention, the measuring cup 8 also includes a dehumidification component disposed inside it. The dehumidification component includes an annular ultrasonic transducer 84 connected to the inner bottom wall of the cup body 81. An insulating liner 85 is also installed on the inner bottom wall of the cup body 81. A plurality of conductive rings 86 are installed on the outer wall of the insulating liner 85, and the interval between each conductive ring 86 is 0.1mm~0.3mm. A plurality of metal wires 88 extending along its axial direction are installed on the top surface of the annular ultrasonic transducer 84. The metal wires 88 are resistance heating wires. Several conductive rings 86 are electrically connected to the power supply module and the control module to form a humidity detection circuit. Adjacent conductive rings 86 are electrically connected to different electrodes of the humidity detection circuit. Metal wires 88 are electrically connected to the heating power supply branch and the control module, respectively. The heating power supply branch and the humidity detection circuit are independent of each other. When the sand sample in the cup 81 contains moisture, the moisture causes adjacent conductive rings 86 to conduct to each other, and the resistance of the humidity detection circuit changes with the humidity of the sand sample. The control module is electrically connected to the ultrasonic transducer and the heating power supply branch, respectively. The control module is used to control the ultrasonic transducer to drive the metal wire to vibrate at high frequency according to the signal of the humidity detection circuit, and to control the heating power supply branch to energize the metal wire 88, so that the metal wire 88 generates Joule heat to heat and dry the sand sample in the cup.

[0024] Specifically, the moisture in the sand sample causes adjacent conductive rings 86 to conduct. The higher the humidity, the more conductive rings are connected and the lower the loop resistance. Based on this, the control module activates the annular ultrasonic transducer 84 to drive the metal wire 88 to vibrate at high frequency, breaking up clumps of sand particles and preventing adhesion. At the same time, the metal wire 88 is energized to generate Joule heat, evaporating residual moisture in the sand and achieving online drying. This structure effectively solves the problems of existing technologies, such as the lack of online drying, slow natural air drying, and inaccurate weighing data. The conductive rings 86 achieve automatic identification of sand sample humidity without manual intervention, and the metal wire 88 achieves dual functions of vibration and heating. The structure is compact and small in size, suitable for field equipment. After drying, the sand sample is pure dry sand, and the weighing results are accurate and reliable, significantly improving monitoring accuracy.

[0025] As a technical optimization of the present invention, the top surface of the grate plate 9 is also provided with a cup holder 10 for fixing the measuring cup 8. The cup holder 10 includes a cylindrical seat 101 fixed on the top surface of the grate plate 9. The bottom surface of the cylindrical seat 101 is provided with a through hole 102 corresponding to the drain outlet 82. The weighing sensor 11 is installed on the inner bottom wall of the cylindrical seat 101, and the bottom surface of the cup body 81 is in contact with the top surface of the weighing sensor 11. A locking groove 104 extending axially is provided on the side wall of the cup body 81. A locking rod 105 that slides radially is provided on the side wall of the cylindrical seat 101. A connecting spring 106 is sleeved on the outside of the locking rod 105. One end of the connecting spring 106 is fixed to the outside of the locking rod 105, and the other end is fixed to the outside of the cylindrical seat 101. Under the initial elastic force of 016, the locking rod 105 is pushed into the inside of the locking groove 104.

[0026] Specifically, after the measuring cup 8 is installed into the cylindrical base 101, the connecting spring 106 drives the locking rod 105 to engage with the locking groove 104, ensuring the cup body 81 is positioned securely and without wobbling. The load cell 11 directly contacts the bottom of the cup body 81, guaranteeing stable and accurate weighing. This structure allows for quick, secure, and wobbly installation of the measuring cup 8, meeting the requirements for wind and earthquake resistance in the field. It avoids weighing errors caused by cup displacement, improves long-term monitoring stability, and features a simple and reliable structure with low maintenance costs. It is suitable for unattended operation scenarios and solves the problem of insecurely fixed measuring cups and easy displacement leading to low weighing accuracy in existing equipment.

[0027] As a technical optimization of the present invention, a flexible tube 103 is installed on the top surface of the through hole 102, and the top end of the flexible tube 103 is in contact with the bottom end face of the drain outlet 82.

[0028] Specifically, its working principle is as follows: the flexible tube 103 seals the connection between the drain outlet 82 and the through hole 102, ensuring that the filtered water can only flow down along the preset channel without leakage or side flow. This structure can prevent water from seeping into the weighing sensor 11 area, avoiding damage to the sensor due to moisture, while also making water flow smoother, improving water filtration and drying efficiency, and solving the problem of water leakage affecting the normal operation of the sensor in existing equipment.

[0029] As a technical optimization of the present invention, a humidity sensor 87 is also installed inside the cup body 81. The humidity sensor 87 and the weighing sensor 11 are both electrically connected to an external power source through wires.

[0030] Specifically, the humidity sensor 87 directly collects the humidity of the sand sample, complementing the detection signal of the conductive ring 86, and together providing a basis for judgment for the control module. This structure realizes dual humidity detection, making humidity judgment more accurate and stable, and the independent and stable power supply ensures long-term continuous operation of the equipment. It solves the problems of single humidity detection, poor reliability, and unstable power supply affecting long-term monitoring in existing equipment.

[0031] As a technical optimization of the present invention, the opening width of the V-shaped sand collection channel gradually decreases from the front end to the bottom end, the baffle 2 is a flat plate structure, and the rear ends of the baffle 2 are connected to each other.

[0032] Specifically, the channel contraction structure causes airflow and sand particles to converge towards the center, improving sand collection efficiency and guidance. This structure makes sand collection more concentrated and prevents spillage, resulting in high collection efficiency. Furthermore, the baffle 2 has a simple structure, is easy to process, and has high strength, reducing the processing cost of the equipment and improving its durability.

[0033] As a technical optimization of the present invention, a cover plate 5 is installed on the top surface of the top plate 1, and the coverage area of ​​the cover plate 5 is larger than that of the top plate 1.

[0034] Specifically, cover plate 5 shields the sand sample from rainwater and dew, preventing them from falling directly into the V-shaped sand collection channel. This structure reduces rainwater entering the sand sample at the source, significantly lowers dehumidification pressure, improves the equipment's adaptability to rain, condensation, and high humidity environments, and solves the problem of existing equipment lacking a rainproof structure and sand samples easily mixing with rainwater, leading to increased weighing errors.

[0035] As a technical optimization of the present invention, a small weather station 6 for monitoring meteorological parameters is installed on the top of the cover plate 5.

[0036] Specifically, the small weather station 6 simultaneously collects meteorological parameters such as wind speed, wind direction, temperature, and humidity, and links them with the sand content data. This structure realizes the synchronous monitoring of sand and meteorological data, making the monitoring and analysis more comprehensive. It is convenient to establish a correlation model between sand intensity and meteorological conditions, improves the value of monitoring data, and solves the problems of existing equipment that can only monitor sand content, have single data, and low analytical value.

[0037] Before the equipment is put into operation, on-site installation must be completed: excavate a pit of appropriate size on the ground at the monitoring point, and place the environmental monitoring equipment for measuring wind and sand content into the pit. The size of the pit should match the shape of the equipment to ensure that the equipment is placed stably and does not shake. After the equipment is buried, only the sand collection component and its V-shaped sand collection channel are exposed above the ground to ensure that external wind and sand can smoothly enter the sand inlet 3. The rest of the equipment is buried underground or placed in the pit, thereby improving the overall stability of the equipment and reducing the interference of the field environment on the monitoring process.

[0038] Before the equipment is put into operation, on-site installation must be completed: excavate a pit of appropriate size on the ground at the monitoring point, and place the environmental monitoring equipment for measuring wind and sand content into the pit. The size of the pit should match the shape of the equipment to ensure that the equipment is placed stably and does not shake. After the equipment is buried, only the sand collection component and its V-shaped sand collection channel are exposed above the ground to ensure that external wind and sand can smoothly enter the sand inlet 3. The rest of the equipment is buried underground or placed in the pit, thereby improving the overall stability of the equipment and reducing the interference of the field environment on the monitoring process.

[0039] Based on this installation, the overall working principle of the equipment is as follows: The wind and sand in the natural environment enter the V-shaped sand collection channel. Because the opening width of the V-shaped sand collection channel gradually decreases from the front end to the bottom end, the sand particles enter through the sand inlet 3 under the guidance of the airflow and slide down the channel to the sand outlet 4. The cover plate 5 on the top surface of the top plate 1 has a larger coverage area than the top plate 1, which can block rainwater from falling into the V-shaped sand collection channel and prevent rainwater from mixing with the sand sample. Sand particles falling from the sand outlet 4 enter through the upper interface 71 of the sand collection hopper 7. The lower part of the sand collection hopper 7 has a circular structure, which can concentrate and guide the dispersed sand particles, and finally fall into the measuring cup 8 through the lower sand outlet 72. The cup body 81 of the measuring cup 8 is connected to the outside of the sand outlet 72 through the top opening to receive the sand sample; the conical filter 83 on the bottom wall of the cup body 81 is located above the water outlet 82, and the bottom end of the conical filter 83 is adapted to the size of the water outlet 82, which can perform preliminary filtration of free water in the sand sample. The water is discharged through the water outlet 82, and the free water contained in the sand can permeate through the filter holes of the conical filter 83 and flow into the water outlet 82 through the bottom end of the conical filter 83 and be discharged. This initially removes most of the free water in the sand and reduces the load of subsequent dehumidification and drying. Passive detection: Several conductive rings 86 spaced 0.1mm to 0.3mm apart are installed on the outer wall of the insulating liner 85 on the inner bottom wall of the cup body 81. Adjacent conductive rings 86 are connected to different electrodes of the humidity detection circuit. When the sand sample contains moisture, the moisture overlaps with the adjacent conductive rings 86 to make them conductive. The higher the humidity of the sand sample, the more conductive rings 86 are conductive, and the smaller the equivalent resistance of the humidity detection circuit. The control module determines the humidity of the sand sample based on this. Active detection: The humidity sensor 87 inside the cup body 81 can directly collect the humidity data of the sand sample, complementing the detection results of the conductive ring 86 and improving the accuracy of humidity judgment; the control module simultaneously initiates two dehumidification actions based on the humidity detection signal: Vibration and dispersing: Control the operation of the annular ultrasonic transducer 84 to drive the metal wire 88 extending axially on its top surface to vibrate at high frequency, dispersing the damp and clump-forming sand particles and preventing the sand particles from adhering to the inner wall of the cup body 81 or the conical filter 83. Joule heating drying: The heating power supply branch is energized to the metal wire 88, which generates Joule heat to directly heat the sand sample, evaporate the water adsorbed in the sand sample, and realize online drying of the sand sample.

[0040] A small amount of water released during the drying process can still permeate through the conical filter 83 to the drain outlet 82, and then flow to the through hole 102 of the cup seat 10. The top of the flexible tube 103 on the top surface of the through hole 102 is in contact with the bottom end face of the drain outlet 82 to ensure that the water is sealed and guided, and to prevent water from leaking into the weighing sensor 11 and affecting the detection accuracy. The water is finally filtered out through the grate plate 9, which at the same time blocks external sand from entering the interior from the bottom of the cup body 81, ensuring accurate weighing data.

[0041] Fixed limit: The measuring cup 8 is placed in the cylindrical seat 101 of the cup holder 10. The initial elastic force of the connecting spring 106 pushes the locking rod 105 to insert into the locking groove 104 on the side wall of the cup body 81, so as to quickly fix the measuring cup 8 and avoid displacement during weighing. Real-time weighing: The weighing sensor 11 on the inner bottom wall of the cylindrical seat 101 is in contact with the bottom surface of the cup body 81 to monitor the weight of the dried sand sample in real time and accurately obtain the sand content data; the humidity sensor 87 and the weighing sensor 11 are both electrically connected to the external power supply through wires to ensure stable power supply. The small weather station 6 on top of the cover plate 5 can monitor meteorological parameters such as wind speed, wind direction, temperature, and humidity, and correlate the sand content data with meteorological environmental parameters to improve the integrity and analytical value of the monitoring data. The monitoring data from the weighing sensor 11, humidity sensor 87, and small weather station 6 are aggregated to the control module, which can output data such as dry sand weight, sand content, sand sample humidity, and meteorological parameters in real time, solving the problems of low weighing accuracy and data distortion caused by moisture interference in traditional equipment.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description; thus, variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An environmental monitoring device for measuring windblown sand content, characterized in that: include; A sand collection assembly includes a top plate (1) with several baffles (2) connected to its bottom surface. The baffles (2) are arranged in a circular array around the central axis of the top plate (1), and a V-shaped sand collection channel is formed between two adjacent baffles (2). The front end of the V-shaped sand collection channel forms a sand inlet (3), and the bottom end of the V-shaped sand collection channel forms a sand outlet (4). A sand collecting hopper (7) has an upper interface (71) at the top and a lower sand outlet (72) at the bottom. The upper interface (71) is connected to the sand outlet (4), and the lower part is circular. The measuring cup (8) includes a cup body (81) with a sealed bottom and an open top. The cup body (81) is fitted onto the outside of the drain outlet (72) through the open top. The bottom of the cup body (81) is provided with a drain outlet (82). A conical filter (83) is installed on the inner bottom wall of the cup body (81). The conical filter (83) is located above the drain outlet (82), and the bottom end of the conical filter (83) is adapted to the size of the drain outlet (82). A grate (9) is connected below the measuring cup (8) and is used to prevent sand from entering the water. A weighing sensor (11) is connected below the measuring cup (8) and is used to monitor the amount of sand collected in real time.

2. The environmental monitoring equipment for measuring windblown sand content as described in claim 1, characterized in that: The measuring cup (8) also includes a dehumidification component disposed inside it. The dehumidification component includes an annular ultrasonic transducer (84) connected to the inner bottom wall of the cup body (81). An insulating liner (85) is also installed on the inner bottom wall of the cup body (81). Several conductive rings (86) are installed on the outer wall of the insulating liner (85). The spacing between each conductive ring (86) is 0.1mm~0.3mm. Several metal wires (88) extending along its axial direction are installed on the top surface of the annular ultrasonic transducer (84). The metal wires (88) are resistance heating wires. A plurality of the conductive rings (86) are electrically connected to the power supply module and the control module to form a humidity detection circuit. Adjacent conductive rings (86) are electrically connected to different electrodes of the humidity detection circuit. The metal wires (88) are electrically connected to the heating power supply branch and the control module. The heating power supply branch and the humidity detection circuit are independent of each other. When the sand sample in the cup (81) contains moisture, the moisture causes adjacent conductive rings (86) to conduct to each other. The resistance of the humidity detection circuit changes with the humidity of the sand sample. The control module is electrically connected to the ultrasonic transducer and the heating power supply branch respectively. The control module is used to control the ultrasonic transducer to drive the metal wire to vibrate at high frequency according to the signal of the humidity detection circuit, and to control the heating power supply branch to energize the metal wire (88) so that the metal wire (88) generates Joule heat to heat and dry the sand sample in the cup.

3. The environmental monitoring equipment for measuring windblown sand content as described in claim 2, characterized in that: The top surface of the grate (9) is also provided with a cup holder (10) for fixing the measuring cup (8). The cup holder (10) includes a cylindrical seat (101) fixed to the top surface of the grate (9). The bottom surface of the cylindrical seat (101) is provided with a through hole (102) corresponding to the drain outlet (82). The weighing sensor (11) is installed on the inner bottom wall of the cylindrical seat (101), and the bottom surface of the cup body (81) is in contact with the top surface of the weighing sensor (11). A locking groove (104) extending axially is provided on the side wall of the cylindrical seat (101). A locking rod (105) sliding radially is provided on the side wall of the cylindrical seat (101). A connecting spring (106) is sleeved on the outside of the locking rod (105). One end of the connecting spring (106) is fixed to the outside of the locking rod (105), and the other end is fixed to the outside of the cylindrical seat (101). Under the initial elastic force of the (016), the locking rod (105) is pushed to insert into the inside of the locking groove (104).

4. An environmental monitoring device for measuring windblown sand content as described in claim 3, characterized in that: A flexible tube (103) is installed on the top surface of the through hole (102), and the top end of the flexible tube (103) is attached to the bottom end face of the drain (82).

5. An environmental monitoring device for measuring windblown sand content as described in claim 1, characterized in that: The cup body (81) is also equipped with a humidity sensor (87), and the humidity sensor (87) and the weighing sensor (11) are electrically connected to an external power source through wires.

6. An environmental monitoring device for measuring windblown sand content as described in claim 1, characterized in that: The opening width of the V-shaped sand collection channel gradually decreases from the front end to the bottom end. The baffle (2) is a flat plate structure, and the rear ends of the baffle (2) are connected to each other.

7. An environmental monitoring device for measuring windblown sand content as described in claim 1, characterized in that: The top surface of the top plate (1) is fitted with a cover plate (5), and the coverage area of ​​the cover plate (5) is larger than that of the top plate (1).

8. An environmental monitoring device for measuring windblown sand content as described in claim 7, characterized in that: A small weather station (6) for monitoring meteorological parameters is installed on the top of the cover plate (5).

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