Unmanned boat emergency monitoring sampler for volatile organic compounds in water bodies

Abstract

The present invention discloses an unmanned boat emergency sampler for monitoring volatile organic compounds in water bodies. The sampler comprises: an electric lifting water pump for controlling the water intake at different depths below the water surface; a four-bottle waterway intake and drainage controller for realizing multi-channel water sampling control for repeated sampling at multiple locations or the same location; a four-needle automated extraction bottle for multiple enrichment of volatile organic compounds in the water body; a sampler device terminal for controlling the operation of the electric lifting water pump, the four-bottle waterway intake and drainage controller, and the four-needle automated extraction bottle according to instructions or programs; and an unmanned boat control system for interacting with the sampler device terminal and performing automated sampling according to instructions or programs and the established unmanned boat waypoint mission plan. The present invention can realize aerial survey-style automated enrichment of multiple volatile organic compounds in water bodies, simulating the manual and meticulous collection process in a laboratory, and has the advantages of precise control, high degree of automation, and time and labor cost savings.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to a sampler for emergency monitoring of volatile organic compounds in water bodies by an unmanned boat. Background Art

[0002] Volatile organic compounds (VOCs) are a class of organic compounds that evaporate rapidly at room temperature. They are widely present in nature and in human activities, such as industrial wastewater, agricultural runoff, and urban drainage. The presence of VOCs can pose potential hazards to ecosystems and human health, making their effective monitoring and control a crucial environmental protection task.

[0003] Traditional VOCs sampling methods typically rely on fixed sampling stations or manual sampling. While these methods can provide relatively accurate data, they have significant limitations. For example, fixed sampling stations have limited coverage and cannot promptly reflect the spatial distribution of VOCs concentrations in water bodies. Manual sampling, on the other hand, is subject to the influence of personnel, time, and environmental conditions. Sampling is often difficult to carry out effectively, especially in severe weather or emergency situations. Furthermore, traditional methods typically require a significant amount of time and human resources, and excessive time consumption can result in insufficient data timeliness. These limitations restrict the application of traditional methods in emergency monitoring.

[0004] With the rapid development of unmanned aerial vehicles (UAVs) in recent years, their flexibility and maneuverability have made them a crucial tool for environmental monitoring. These vessels can operate autonomously or semi-autonomously, conducting long-duration sampling cruises in dangerous or inaccessible waters, significantly improving monitoring efficiency and coverage.

[0005] Chinese patent publication CN 221377245 U discloses an industrial wastewater sampling device. The device is applied to a catamaran unmanned vessel. The device utilizes the vessel's onboard controller and remotely controls the vessel to a specific location. A newly added controller, communicating with the onboard controller, then controls a small motor in the forward direction, rotating a drum. This allows a rope to be lowered from a clearance hole, allowing a liquid absorber at the free end of the rope to enter the wastewater. The lowering height is controlled by an encoder. Once the liquid absorber enters the wastewater, the controller controls the absorber to begin sampling. The small motor then controls the reverse direction to retract the absorber, completing the wastewater sampling process.

[0006] However, existing small unmanned boats are mostly used for basic monitoring of water quality parameters such as temperature, pH, dissolved oxygen, etc., but their sampling and analysis capabilities for complex chemical pollutants such as volatile organic compounds are still relatively limited.

[0007] Therefore, it is of great technical significance to develop a VOCs sampler that can be integrated into a small unmanned boat, especially a sampler suitable for emergency monitoring scenarios. Summary of the Invention

[0008] The present invention provides a sampler for emergency monitoring of volatile organic compounds in water bodies by an unmanned boat. The sampler is used in conjunction with an unmanned boat, can quickly reach each designated sampling point in sequence, and automatically perform fine headspace enrichment sampling, thereby realizing aerial survey-type automated enrichment of multiple volatile organic compounds in water bodies.

[0009] The technical solutions of the present invention are as follows:

[0010] A sampler for emergency monitoring of volatile organic compounds in water by an unmanned boat, comprising:

[0011] Electric lifting water pump, used to control the water intake at different depths below the water surface;

[0012] Four-bottle water sampling and drainage controller realizes multi-channel water sampling control and is used for repeated sampling at multiple locations or the same location;

[0013] Four-needle automated extraction bottle, used for multiple enrichment of volatile organic compounds in water;

[0014] The sampler equipment terminal controls the operation of the electric lifting water pump, the four-bottle water supply and drainage controller, and the four-needle automatic extraction bottle according to instructions or programs;

[0015] The unmanned vessel control system interacts with the sampler equipment terminal and performs automated sampling according to the instructions or procedures and the established unmanned vessel waypoint mission plan.

[0016] The sampler of the present invention is arranged on an unmanned ship and works in conjunction with the unmanned ship. The sampler is installed in the cabin of the unmanned ship and is protected by a cabin cover on the outside. The unmanned ship is provided with a GPS module.

[0017] Preferably, the electric lifting water pump is arranged at the stern of the unmanned boat, and includes a water pumping hose, a filter arranged at the end of the water pumping hose, a hose receiving wheel for receiving the water pumping hose, and a waterproof rotary servo for driving the hose receiving wheel to rotate.

[0018] The free end of the water-drawing hose passes through the hose receiving wheel and is connected to the peristaltic pump in the four-bottle water supply and drainage controller; the waterproof rotary servo drives the hose receiving wheel to rotate, changing the depth of the filter at the end of the water-drawing hose submerged in the water surface, so as to control the collection of water samples at different depths.

[0019] Preferably, the waterproof rotary steering gear can be raised and lowered, thereby changing the relative position of the water pump and the water surface. When the unmanned boat is in a sailing state, the water pump is in an upward and retracted state to reduce the sailing resistance of the unmanned boat.

[0020] Preferably, the filter is made of stainless steel or cast iron; the shape of the filter is cylindrical, conical, spherical or hexahedral.

[0021] Preferably, the four-bottle water supply and drainage controller includes:

[0022] A peristaltic pump is connected to the free end of the water-supply hose of the electric lifting water-supply device;

[0023] One-to-four connector, the inlet end is connected to the peristaltic pump through a hose, and the outlet end is connected to the four-way electromagnetic water valve through a hose;

[0024] The drainage controller mainboard controls the peristaltic pump and electromagnetic water valve according to instructions or programs.

[0025] Preferably, the four-needle automated extraction bottle includes a four-needle automated extraction bottle control mainboard, a four-needle automated extraction device arranged at the top and controlled by the four-needle automated extraction bottle control mainboard, and an extraction bottle arranged at the bottom.

[0026] Preferably, the four-needle automated extraction device comprises:

[0027] Support base and pedestal;

[0028] Precision push rod, installed on the support base, linked with the push rod of the syringe;

[0029] The micro switch limiter is installed on the support seat and is used to limit the stroke of the precision push rod;

[0030] The syringe comprises an independent sealed space of the syringe and a push rod slidably arranged in the independent sealed space of the syringe, and an extraction fiber head is arranged at the end of the push rod; the independent sealed space of the syringe is fixed on the base, and a micro-mechanical valve is arranged at the bottom;

[0031] The stirrer includes a linked motor and a stirring paddle, wherein the motor is fixed on a base and the stirring paddle is placed in the extraction bottle;

[0032] Precision push rods, micro-mechanical valves, and motors are controlled by the four-pin automated extraction bottle control motherboard.

[0033] Preferably, the bottom of the extraction bottle is connected to the electromagnetic water valve through a hose, and a two-way water valve is provided between the bottom of the extraction bottle and the hose.

[0034] The extraction bottle is a 100 ml glass bottle with a bottom designed to be convex upwards; when the extraction bottle is arranged in the unmanned boat, it is tilted toward the water-drawing hose side in the bottle to facilitate complete drainage.

[0035] Preferably, the precision push rod is fixedly connected to the top of the push rod of the syringe by a cross lock to prevent the unmanned boat from being separated due to bumpy sailing.

[0036] The push rod and micro switch limiter are designed to limit the stroke to protect the outer coating of the extraction fiber head.

[0037] The independent, sealed chamber beneath the syringe is used to house the inorganic salt solid reagent and is integrated with a micro-mechanical valve. When the micro-mechanical valve opens, the inorganic salt falls into the liquid in the extraction flask and is dissolved by the high-speed stirring motor paddle, thereby increasing the ionic strength of the solution, reducing the solubility of the target analyte, and improving extraction efficiency.

[0038] The syringe in the four-needle automated extraction bottle does not limit the type of extraction fiber head, the type of inorganic salt and the addition method. Additional hoses, peristaltic pumps, electromagnetic water valves and water bags can also be added to quantitatively pump in saturated inorganic salt solution.

[0039] The number and capacity of the four-needle automated extraction bottles are not limited. The number and capacity of the extraction bottles of the present invention are only limited by the limited space inside the small unmanned boat.

[0040] The sampler equipment terminal is used for interactive control among the electric lifting water pump, the four-bottle water intake and drainage controller, the four-pin automatic extraction bottle, and the unmanned boat control system. It can integrate and install more environmental sensors for monitoring and collection or other auxiliary control mechanical switches, including cameras, temperature, humidity, wind speed, GPS, etc.

[0041] The unmanned vessel control system primarily interacts with the sampler equipment terminal, carrying out automated sampling according to the unmanned vessel's planned waypoint mission. It can also implement more comprehensive emergency monitoring functions based on actual needs. The unmanned vessel control system utilizes 4G and 5G network communications for direct communication, as well as indirect communication with unmanned vessel and drone controllers, enabling real-time monitoring of the entire equipment's operational status.

[0042] Preferably, the sampler has a shell; the shell is made of metal to increase its durability and corrosion resistance.

[0043] Preferably, the extraction bottle is made of glass to reduce the adsorption effect of the material, thereby ensuring sufficient enrichment of volatile organic compounds.

[0044] The sampler workflow includes:

[0045] (1) Start the power supply of the sampler. After the sampler system passes the self-test, add an appropriate amount of inorganic salt (NaCl) solid into the enclosed space of the syringe, and then install the extraction syringe into the top of the four-needle automatic extraction bottle; start the power supply of the unmanned boat, and plan the navigation route of the unmanned boat according to the sampling GPS location information;

[0046] (2) The unmanned boat is controlled to sail to the sampling point through a program or remote command. During the navigation process, the water intake of the electric lifting water pump is raised to above the water surface at the stern of the boat;

[0047] (3) After the unmanned boat arrives at the sampling point, it automatically performs the sampling task:

[0048] (i) The sampler terminal controls the rotation of the waterproof rotary servo to immerse the filter at the end of the water-drawing hose in water, and automatically adjusts the rotation angle of the hose receiving wheel according to the required sample collection depth;

[0049] (ii) The peristaltic pump rotates upward to draw in the water sample, and at the same time opens the electromagnetic water valve corresponding to the preset extraction bottle to rinse the pipeline and sample bottle. After rinsing, the peristaltic pump drains the water sample downward;

[0050] (iii) The peristaltic pump rotates upward to draw the water sample, which flows into the pre-set extraction bottle. After a fixed amount of water sample is collected, the peristaltic pump stops, the micro-mechanical valve opens, and the inorganic salt solid falls into the liquid. The high-speed stirring motor paddle rotates, and the precision push rod pushes the extraction fiber head out, starting the extraction;

[0051] (iv) After the extraction is completed, the high-speed stirring motor paddle stops rotating, the precision push rod retracts the extraction fiber head, the micro-mechanical valve closes, and the peristaltic pump discharges the water sample downward. After the water sample in the extraction bottle is emptied, the peristaltic pump stops rotating;

[0052] (4) The waterproof rotary servo rotates a certain angle to raise the water intake of the electric lifting water pump to above the water surface at the stern. The unmanned boat sails to the next sampling point to collect water again until the collection task of all sampling points is completed;

[0053] (5) After completing the sampling mission, the unmanned boat returns to its initial position, opens the upper hatch, takes out the extraction syringe, and uses a portable GC-MS for rapid detection.

[0054] When the drone boat arrives at the sampling point, the propellers on the main body of the drone boat stop working. If the water current causes the drone boat to deviate from the sampling point, the drone boat control system will automatically execute the cruise sequence and restart the propellers on the main body of the drone boat to ensure that the drone boat stays at the sampling point.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] (1) The combination of the sampler of the present invention and the unmanned vessel makes the sampling process highly automated and precise. The unmanned vessel can automatically reach multiple designated sampling points according to a pre-planned navigation route and perform precise headspace enrichment sampling, greatly improving the sampling efficiency and spatial coverage. It avoids the use of manned vessels and staff to directly reach the sampling points for operation, significantly reducing sampling costs and the risk factor for sampling staff, and is particularly suitable for emergency monitoring scenarios.

[0057] (2) The present invention controls the entire sampling process through programs and standard instructions, avoiding the impact of manual operation on sampling quality and ensuring the consistency and reliability of each sampling. It can flexibly control the sampling depth and enrich volatile organic compounds in the water body multiple times, ensuring the representativeness of the sample and the accuracy of the test results. At the same time, the design of the sampler supports multi-point collection and repeated sampling of water samples at different depths, further improving the reliability of the data.

[0058] (3) Combining with portable GC-MS equipment can realize rapid detection after sampling, significantly shorten the response time of emergency monitoring, and provide strong support for timely implementation of environmental protection measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 This is a schematic diagram of the overall appearance and layout of the small unmanned boat sampler of the present invention;

[0060] Figure 2 This is a schematic structural diagram of the sampler-electric lifting water pump device of the present invention;

[0061] Figure 3 This is a structural diagram of the sampler-four-bottle water supply and drainage controller device of the present invention;

[0062] Figure 4 This is a schematic diagram of the structure of the sampler-four-needle automated extraction bottle unit device of the present invention;

[0063] Figure numerals: 1: filter; 2: water-drawing hose; 3: hose storage wheel; 4: waterproof rotary servo; 5: peristaltic pump; 6: four-way electromagnetic water valve; 7: hose; 8: one-to-four water pipes; 9: syringe and independent sealed space for syringe; 10: precision push rod; 11: micro switch limiter; 12: micro-mechanical valve; 13: high-speed stirring motor paddle; 14: extraction bottle; 15: four-needle automated extraction bottle control motherboard; 16: support base; 17: square base; 18: unmanned boat; 19: ship compartment cover; 20: sampler; 21: GPS module. DETAILED DESCRIPTION

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0065] Unless otherwise defined, technical or scientific terms used herein shall have the same meanings as those generally understood by persons of ordinary skill in the art to which this invention pertains. Where specific techniques or conditions are not specified in the examples, the techniques or conditions described in the literature in the art or in the product instructions shall prevail.

[0066] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the embodiments of the present invention.

[0067] Example 1

[0068] The present invention provides a small unmanned boat emergency monitoring water sampler for volatile organic compounds, such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The sampler is composed of an electric lifting water pump, a four-bottle water intake and drainage controller, a four-needle automatic extraction bottle, a sampler equipment terminal and an unmanned boat control system.

[0069] The sampler of the present invention is arranged on an unmanned ship, and the overall layout of the device is as follows: Figure 1 The sampler 20 is installed in the cabin of the unmanned boat 18 and is protected by a cabin cover 19. The unmanned boat 18 is provided with a GPS module 21.

[0070] Specifically, if Figure 2As shown, the electric lifting water pump is installed on the rear side of the unmanned boat by bolts, and the hose storage wheel 3 and the waterproof rotary servo 4 are installed on the L-shaped stainless steel bracket to control the rotation of the water-drawing hose 2. A filter 1 is installed at the end of the water-drawing hose 2. The water-drawing hose 2 passes through the hose storage wheel 3 and extends to the peristaltic pump 5 in the four-bottle water supply and drainage controller. The waterproof rotary servo 4 drives the hose storage wheel 3 to rotate, changing the depth of the water-drawing hose 2 submerged in the water, thereby controlling the collection of water samples at different depths, and storing the water-drawing hose 2 when the unmanned boat is sailing to reduce navigation resistance. The filter 1 is made of stainless steel or cast iron, and has a cylindrical, conical, spherical, or hexahedral shape. The filter in the present invention is preferably made of cylindrical stainless steel. The peristaltic pump in the present invention can be replaced by other forms of water pumps such as plunger pumps.

[0071] like Figure 3 As shown, the four-bottle water supply and drainage controller includes a chassis mounted at the bottom, a peristaltic pump 5 connected to an electric lift pump, a hose 7 connected to the peristaltic pump, and a four-way water pipe 8 located at the rear end of the water supply hose. This four-way water pipe 8 connects to a four-way solenoid valve 6, with a hose interposed between them. Each of the four solenoid valves 6 corresponds to one of the four four-needle automated extraction bottles. The main board of the water supply and drainage controller, located within the unmanned boat, controls the status of the peristaltic pump 5 and the opening and closing of the four-way solenoid valves 6 according to a program or instructions.

[0072] like Figure 4As shown, the four-needle automated extraction bottle includes four precision push rods 10 mounted on the upper portion, a microswitch limiter 11 positioned below the upper structure of the precision push rods 10, and a support base 16 connecting the precision push rods 10 to the microswitch limiter 11. The upper structure of the precision push rods 10 is fixed to the top mounting of the syringe 9 using a cross lock to prevent detachment caused by the bumpy ride of the unmanned vessel. The precision push rods 10 utilize the upper structure to drive the syringe 9 attached to them for vertical movement. The length of the precision push rods 10 can be adjusted according to the actual device requirements. The four syringes are inserted into an independent, enclosed space within the syringes. This enclosed space acts as a protective shield, protecting the syringe needles and providing storage for inorganic salts. The extraction fiber head serves as the syringe needle. The four syringes and the independent, enclosed space 9 are mounted on a central square base 17 and connected to the support base 16. A micromechanical valve 12 is located at the bottom of the independent, enclosed space. A reduction motor is located at the center of each syringe and connected to a high-speed stirring motor paddle 13. Extraction bottle 14, a 100ml glass bottle, is positioned beneath a central square base 17, with an upwardly protruding bottom. The bottom of central square base 17 is threaded to fit the screw thread of extraction bottle 14, and central square base 17 and extraction bottle 14 are connected by a screw connection. The upper portion of the four-pin automated extraction bottle control motherboard 15 is fixedly connected to central square base 17 via a snap-fit ​​mechanism, controlling the sampling and extraction status according to a program or remote commands.

[0073] A two-way water valve is provided between the four-bottle water channel intake and drainage controller and the four-pin automated extraction bottle, and the two-way water valve is equipped with one for each extraction bottle. The four-way electromagnetic water valve 6 is connected to the middle square base 17 through a hose and the two-way water valve.

[0074] The syringe's independent, enclosed space 9 is used to hold solid inorganic salt reagents (NaCl, Na2SO4). This space, in conjunction with a micro-mechanical valve 12, allows the inorganic salt to fall into the liquid and dissolve via a high-speed stirring motor paddle 13, increasing the ionic strength of the solution. This reduces the solubility of the target analyte, improves extraction efficiency, and rapidly enriches the target contaminant. The type and method of adding the inorganic salt are not limited. While the present invention employs solid addition, additional hoses, peristaltic pumps, electromagnetic water valves, and water bags can also be added to quantitatively pump in a saturated inorganic salt solution.

[0075] The size and quantity of the four-needle automated extraction bottle 14 can be flexibly configured according to application requirements. The extraction bottle 14 is preferably a 100 ml glass bottle.

[0076] The extraction bottle 14 can be fixed to the inner compartment of the unmanned boat 18 by using elastic webbing, plastic buckle or stainless steel clamp, which is convenient for disassembly and assembly. Figure 1As shown, the extraction bottles 14 can be arranged in a linear or array configuration according to the actual size of the interior of the unmanned boat 18. The sizes of the precision push rod 10 and the micro switch limiter 11 can be flexibly set according to the size of the unmanned boat 18 and the extraction bottles.

[0077] To increase the durability and corrosion resistance of the sampler, the shell is preferably made of metal, but plastic materials such as PLA, PP, PE, and ABS can also be used. The extraction bottle is preferably made of glass to reduce the adsorption effect of the material and ensure sufficient enrichment of volatile organic compounds.

[0078] The working principle of the sampler for emergency monitoring of volatile organic compounds in water bodies by a small unmanned boat of the present invention is as follows:

[0079] During water sample collection and extraction, the waterproof rotary servo 4 rotates the hose retractor 3, submerging the filter 1 at the end of the water-drawing hose 2 into the water to draw the sample. The water-drawing hose 2 can be customized to the desired length. The water sample is drawn by a peristaltic pump 5 and delivered to the four-way solenoid valve 6 via a one-to-four water pipe 8. Once the four-way solenoid valve 6 corresponding to the designated extraction bottle 14 opens, the sample is pumped from the bottle mouth into the designated extraction bottle through a two-way valve. After the predetermined volume of water sample has been collected, the peristaltic pump 5 stops, the four-way solenoid valve 6 closes, and the micro-mechanical valve 12 opens. The appropriate amount of pre-added inorganic salt solid reagent falls into the extraction bottle 14. The high-speed stirring motor paddle 13 activates stirring, and the precision push rod 10 pushes downward, exposing the extraction fiber above the water sample for headspace extraction. When extraction is complete, the high-speed stirring motor paddle 13 stops stirring, the precision push rod 10 retracts upward, the micro-mechanical valve 12 closes, and the peristaltic pump 5 rotates in the opposite direction, emptying the sample from the extraction bottle.

[0080] The sampler for emergency monitoring of volatile organic compounds in water by a small unmanned boat of the present invention has at least the following advantages:

[0081] (1) The combination of the sampler and a small unmanned vessel makes the sampling process highly automated and precise. The unmanned vessel can automatically reach multiple designated sampling points according to a pre-planned navigation route and perform precise headspace enrichment sampling, greatly improving the sampling efficiency and spatial coverage.

[0082] (2) Avoid using manned ships and staff to directly arrive at the sampling point for operation, which greatly reduces the sampling cost and the risk factor of sampling staff, and is especially suitable for emergency monitoring sites.

[0083] (3) The entire sampling process is controlled by procedures and standard instructions, avoiding the impact of manual operation on sampling quality and ensuring the consistency and reliability of each sampling.

[0084] (4) The sampling depth can be flexibly controlled according to actual needs and volatile organic compounds in water can be enriched multiple times to ensure the representativeness of the samples and the accuracy of the test results.

[0085] (5) A single extraction bottle can be preloaded with four extraction syringes, supporting repeated extraction and enrichment of water samples from the same sampling point, thereby improving data reliability.

[0086] (6) Combining with portable GC-MS equipment can achieve rapid detection after sampling, significantly shorten the response time of emergency monitoring, and provide strong support for timely implementation of environmental protection measures.

[0087] Example 2

[0088] The present invention also provides a method for emergency monitoring of volatile organic compounds in water using a small unmanned boat sampler, comprising the following steps:

[0089] A. Start the power supply of the sampler. After the sampler system passes the self-test, add an appropriate amount of inorganic salt (NaCl) solid into the syringe confined space 9, and then install the extraction syringe into the top of the four-needle automated extraction bottle 14; start the power supply of the unmanned boat and plan the navigation route of the unmanned boat according to the sampling GPS location information;

[0090] B. Control the unmanned boat to the sampling point through a program or remote command. During navigation, the steering gear water intake is raised above the water level at the stern;

[0091] C. After the unmanned boat arrives at the sampling point, it automatically performs the sampling task. In the first step, the sampler equipment terminal controls the waterproof rotary servo 4 to rotate, so that the end filter 1 of the water-drawing hose 2 is immersed in water, and the rotation angle of the hose storage wheel 3 is automatically adjusted according to the sample collection depth requirement;

[0092] D. In the second step, the peristaltic pump 5 rotates upward to absorb the water sample, and at the same time opens the four-way electromagnetic water valve 6 corresponding to the preset extraction bottle 14 to rinse the pipeline and the sample bottle. After the rinsing is completed, the peristaltic pump drains the water sample downward;

[0093] E. In the third step, the peristaltic pump 5 rotates upward to absorb the water sample, and the water sample flows into the preset extraction bottle 14. After the quantitative water sample is collected, the peristaltic pump 5 stops rotating, the micro-mechanical valve 12 opens, the inorganic salt solid falls into the liquid, the high-speed stirring motor paddle 13 rotates, and the precision push rod 10 pushes the extraction fiber head out to start extraction;

[0094] F. After the extraction is completed, the high-speed stirring motor paddle 13 stops rotating, the precision push rod 10 retracts the extraction fiber head, the micro-mechanical valve 12 is closed, and the peristaltic pump 5 discharges the water sample downward. After the water sample in the extraction bottle 14 is emptied, the peristaltic pump 5 stops rotating;

[0095] G. The waterproof rotary servo 4 rotates a certain angle to raise the servo water intake to above the water surface at the stern. The unmanned boat sails to the next sampling point to collect samples again until the collection tasks of all sampling points are completed;

[0096] H. After completing the sampling mission, the unmanned boat returns to its initial position, opens the upper hatch, takes out the extraction syringe, and uses a portable GC-MS for rapid testing.

[0097] During steps B to G, the propellers on the main body of the unmanned boat stop working after the unmanned boat arrives at the sampling point. If the water current causes the unmanned boat to deviate from the sampling point, the unmanned boat control system will automatically execute a cruise sequence and restart the propellers on the main body of the unmanned boat to ensure that the unmanned boat remains at the sampling point.

[0098] The unmanned vessel control system has two modes: automatic and manual. In automatic survey mode, the vessel can be controlled by the control system to follow a preset route, collecting and extracting water at each sampling point in sequence. After completing the task, it returns to its starting position along the prescribed route. In manual mode, the operator can remotely control the vessel via a controller to reach the designated location and perform the sampling task.

[0099] The present invention is applicable to the collection of various types of liquid samples, and is not limited to different types of water bodies, including Class I water bodies, Class II water bodies, industrial sewage, domestic water, etc. The sampler is not limited to installation and use on large, medium, and small unmanned remote-controlled transport equipment or manned transport equipment, including drones, unmanned vehicles, unmanned ships, unmanned submersibles, etc. The sampler and use method for emergency monitoring of volatile organic compounds in water bodies by small unmanned boats of the present invention can automatically collect water samples from multiple sampling points in sequence, integrating collection, extraction and enrichment, and can set the number of sample collections and the number of repetitions according to actual needs, and can flexibly control the depth of water sample collection, greatly improving sampling efficiency, facilitating rapid in-situ detection, and being suitable for emergency monitoring scenarios.

[0100] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0101] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or modes and features of different embodiments or modes described in this specification without contradiction.

[0102] The embodiments described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sampler for emergency monitoring of volatile organic compounds in water by an unmanned boat, characterized in that: include: An electrically operated lifting water drawer for controlling the water intake at different depths below the water surface, comprising a water drawer hose, a filter disposed at the end of the water drawer hose, a hose receiving wheel for receiving the water drawer hose, and a waterproof rotary servo for driving the hose receiving wheel to rotate; The four-bottle water sampling and drainage controller implements multi-channel water sampling control for repeated sampling at multiple locations or the same location. It includes: a peristaltic pump connected to the free end of the water suction hose of the electric lifting water pump; a one-to-four connector, the inlet end of which is connected to the peristaltic pump through a hose, and the outlet end is connected to the four-way solenoid water valve through hoses; and a main board of the water sampling and drainage controller controls the peristaltic pump and the four-way solenoid water valve according to instructions or programs. A four-needle automated extraction bottle is used for multiple enrichment of volatile organic compounds in water bodies, comprising a four-needle automated extraction bottle control mainboard, a four-needle automated extraction device arranged at the top and controlled by the four-needle automated extraction bottle control mainboard, and an extraction bottle arranged at the bottom; the four-needle automated extraction device comprises: a support seat and a base; a precision push rod, installed on the support seat and linked to the push rod of the syringe; a micro switch limiter, installed on the support seat, for limiting the stroke of the precision push rod; the syringe comprises an independent sealed space of the syringe and a push rod slidably arranged in the independent sealed space of the syringe, and an extraction fiber head is arranged at the end of the push rod; the independent sealed space of the syringe is fixed on the base, and a micro-mechanical valve is arranged at the bottom, the independent sealed space of the syringe is used to place inorganic salt solid reagents, and cooperates with the micro-mechanical valve. When the micro-mechanical valve is opened, the inorganic salt falls into the liquid in the extraction bottle; the agitator comprises a linked motor and a stirring paddle, the motor is fixed on the base, and the stirring paddle is placed in the extraction bottle; the precision push rod, the micro-mechanical valve, and the motor are controlled by the four-needle automated extraction bottle control mainboard; The sampler equipment terminal controls the operation of the electric lifting water pump, the four-bottle water supply and drainage controller, and the four-needle automatic extraction bottle according to instructions or programs; The unmanned vessel control system interacts with the sampler equipment terminal and performs automated sampling according to the instructions or procedures and the established unmanned vessel waypoint mission plan.

2. The unmanned boat emergency monitoring water sampler for volatile organic compounds according to claim 1 is characterized in that: The electric lifting water pump is arranged at the stern of the unmanned boat.

3. The sampler for emergency monitoring of volatile organic compounds in water by an unmanned boat according to claim 2 is characterized in that: The free end of the water-drawing hose passes through the hose receiving wheel and is connected to the peristaltic pump in the four-bottle water supply and drainage controller; the waterproof rotary servo drives the hose receiving wheel to rotate, changing the depth of the filter at the end of the water-drawing hose submerged in the water surface, so as to control the collection of water samples at different depths.

4. The unmanned boat emergency monitoring water sampler for volatile organic compounds according to claim 1, characterized in that: The bottom of the extraction bottle is connected to the electromagnetic water valve through a hose, and a two-way water valve is provided between the bottom of the extraction bottle and the hose.

5. The unmanned boat emergency monitoring water sampler for volatile organic compounds according to claim 1, characterized in that: The precision push rod is fixedly connected to the top of the push rod of the syringe by adopting a cross lock method.

6. The unmanned boat emergency monitoring water sampler for volatile organic compounds according to claim 1, characterized in that: The sampler has a shell; the shell is made of metal.

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