Sediment generating device for multi-type sediment monitoring instrument and use method of sediment generating device

Abstract

The invention discloses a sediment generation device for a multi-type sediment monitor and a use method thereof.The device comprises a water flow supply unit and a sediment generation unit, the water flow supply unit is used for inputting water flow to the sediment generation unit, and the sediment generation unit is used for receiving the water flow and a preset soil sample; the sediment generating unit is used for generating water flow and mixing the water flow and a preset soil sample to form a sediment sample in a moving state, a stirring structure and a multi-purpose grid plate are arranged in the sediment generating unit, the stirring structure comprises a horizontally arranged stirring shaft and two stirring blades, the stirring blades are spirally fixed on the stirring shaft, the two stirring blades are symmetrically arranged on the stirring shaft, and the multi-purpose grid plate is arranged on the stirring shaft. The multi-purpose grid plate is fixed above the stirring structure, the sediment monitoring equipment is mounted on the multi-purpose grid plate, and the sediment monitoring equipment can collect sediment sample data from the water flow supply unit for detection. According to the invention, sediment and water are fully mixed, sedimentation is avoided, stable sediment concentration is maintained, and the reliability of test data is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of sediment monitoring equipment detection, and particularly to a sediment generating device for multiple types of sediment monitors and its usage method. Background Art

[0002] In the fields of water conservancy projects, soil and water conservation, and environmental monitoring, the performance detection of runoff sediment monitoring equipment is crucial, and its accuracy directly affects soil erosion assessment, sediment transport research, and flood control and disaster reduction decision-making. To verify the reliability of monitoring equipment, it is usually necessary to use a sediment generating device in a laboratory environment to simulate the working conditions of different sediment-laden water flows, including different sediment concentrations, particle size distributions, temperatures, and bubble interferences. However, there are still many technical limitations in existing sediment generating devices, making it difficult to meet diverse detection requirements.

[0003] Currently, common sediment generating devices mainly use mechanical stirring or circulating water pumps to achieve sediment suspension. However, due to uneven stirring or too fast sedimentation speed, it is difficult to maintain a stable sediment concentration, resulting in large fluctuations in test data. In addition, traditional devices usually lack a heating and temperature control system and cannot simulate the influence of different water temperatures (such as low temperature in winter or high temperature in summer) on monitoring equipment. At the same time, many sediment monitors (such as optical and ultrasonic types) are easily interfered by bubbles in actual applications, and most existing devices do not integrate a bubble generation function, resulting in the inability to evaluate the anti-interference ability of equipment in complex water body environments.

[0004] Therefore, there is an urgent need to develop a new type of sediment generating device that can achieve efficient and uniform stirring, precise temperature control, and controllable bubble generation to more comprehensively simulate the sediment environment under real hydrological conditions, so as to meet the performance detection requirements of various sediment monitoring equipment and improve the reliability and efficiency of laboratory tests. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a sediment generating device and method for multiple types of sediment monitors.

[0006] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0007] A sediment generation device for multi-type sediment monitors, comprising a water flow supply unit and a sediment generation unit. The water flow supply unit is used to input water flow into the sediment generation unit. The sediment generation unit is used to receive the water flow and a predetermined soil sample, and mix the water flow and the predetermined soil sample to form a moving sediment sample. A stirring structure and a multi-purpose grid plate are arranged in the sediment generation unit. The stirring structure includes a horizontally arranged stirring shaft and two stirring blades. The stirring blades are fixed to the stirring shaft in a spiral shape, and the two stirring blades are symmetrically arranged on the stirring shaft. The multi-purpose grid plate is fixed above the stirring structure, and a plurality of mesh holes are arranged on the multi-purpose grid plate. The sediment monitoring device is installed on the multi-purpose grid plate, and the sediment monitoring device can collect sediment sample data from the water flow supply unit for detection.

[0008] To optimize the above technical solution, the specific measures taken also include:

[0009] The sediment generation device includes an equipment bin and a sediment generation bin. The equipment bin and the sediment generation bin are hermetically isolated from each other. A stirring motor is fixedly installed in the equipment bin. The main part of the stirring shaft is located in the sediment generation bin. One end of the stirring shaft penetrates into the equipment bin and is in transmission connection with the stirring motor, and the stirring motor can drive the stirring shaft to rotate.

[0010] The water flow supply unit includes a circulation pipeline, a circulation water pump and a flow meter. The two ends of the circulation pipeline are respectively connected to the front end and the rear end of the sediment generation unit. The circulation water pump can make the sediment sample generate a circulation in the circulation pipeline and the sediment generation bin. The flow meter is connected to the circulation pipeline and is used to detect the water flow rate entering the sediment generation bin through the circulation pipeline. An inlet is also connected to the circulation pipeline, and the inlet is connected to an external water source. The external water source can inject water into the sediment generation bin through the inlet, and the sediment monitoring device collects sediment sample data from the circulation pipeline for detection.

[0011] The sediment generation device further includes a heating device. The heating device includes a heating resistor, and the heating resistor is laid at the bottom of the sediment generation bin and is used to heat the water in the sediment generation bin.

[0012] The sediment generation device further includes a bubble generation device. The bubble generation device includes a bubble generation pump and a bubble tube. The bubble generation pump is installed in the equipment bin. One end of the bubble tube penetrates into the equipment bin and is connected to the bubble generation pump, and the other end is connected to the connection point between the circulation pipeline and the rear end of the sediment generation unit. The bubble generation pump can inject gas into the bubble tube, and then the bubble tube inputs bubbles into the circulation pipeline.

[0013] The stirring motor is connected with a speed reducer, and the stirring motor is in transmission connection with the stirring shaft through the speed reducer.

[0014] A control unit is installed on the equipment bin. The control unit includes a signal input port, a central control chip, and a display. The central control chip is respectively signal-connected to a stirring motor, a circulation water pump, a flow meter, a heating resistor, a bubble generating pump, the signal input port, and the display. The central control chip can receive information from the flow meter and the signal input port, control the operation of the stirring motor, the circulation water pump, the heating resistor, and the bubble generating pump, and send information to the display. The display is used to display the information sent by the central control chip.

[0015] A thermocouple is installed in the sediment generation bin. The thermocouple is used to detect the temperature of the sediment sample in the sediment generation bin, and the thermocouple is signal-connected to the central control chip.

[0016] A sand discharge port is provided at the bottom of the sediment generation bin. The sand discharge port is used to discharge the sediment sample.

[0017] A usage method of a sediment generation device for multi-type sediment monitors includes the following steps:

[0018] Step 1: Pour the weighed dry sediment into the sediment generation bin, open the water inlet on the circulation pipeline, inject a predetermined amount of clear water into the sediment generation bin, and start the stirring motor to stir the sediment in the sediment generation bin to obtain a well-mixed sediment sample;

[0019] Step 2: Install the sediment monitoring device on the multi-purpose grid plate, and connect the detection end of the sediment monitoring device to the circulation pipeline;

[0020] Step 3: Start the circulation water pump to make the sediment sample flow in the circulation pipeline at a predetermined speed;

[0021] Step 4: Start the heating device to heat the sediment sample to the first predetermined temperature;

[0022] Step 5: The sediment monitoring device continuously samples the sediment sample in the circulation pipeline to record the sediment concentration measurement value. At the same time, the sediment sample in the circulation pipeline is extracted and the true value of the sediment concentration of the sediment sample is measured by the drying and weighing method. The relative error is calculated by comparing the measurement value and the true value.

[0023] Relative error = ∣Measurement value - True value∣ / True value × 100%

[0024] If the error ≤ the nominal accuracy of the sediment monitoring device, it is determined that the sediment monitoring device is qualified at the first predetermined temperature, otherwise it is unqualified;

[0025] Step 6: Repeat steps 4 to 5. Each time it is repeated, change the heating temperature of the sediment sample, and the number of repetitions is ten times;

[0026] Step 7: When it is necessary to detect the measurement accuracy of the sediment monitoring device in a multi-bubble environment, start the bubble generating device to mix bubbles into the circulation pipeline, and then repeat steps 4 to 6.

[0027] The beneficial effects of the present invention are:

[0028] 1. The present invention adopts a spiral symmetrical stirring structure, with a horizontal stirring shaft and two symmetrical spiral blades to ensure that the sediment and water are fully mixed, avoid sedimentation, maintain a stable sediment concentration, and improve the reliability of the test data.

[0029] 2. The present invention adopts a multi-purpose grid plate design. The grid plate is located above the stirring structure, providing a stable installation platform, which is suitable for a variety of sediment monitoring equipment (such as optical, ultrasonic, capacitive, etc.), facilitating the sensor to directly collect sample data, and at the same time facilitating the staff to stand on the multi-purpose grid plate to install the equipment, preventing the staff from falling into the sediment generation bin.

[0030] 3. The present invention has a precise temperature control function. The bottom of the sediment generating chamber is integrated with a heating resistor, which can adjust the water temperature and simulate different environments (such as low-temperature rivers or high-temperature working conditions) to meet the performance test requirements of the monitoring equipment under different temperature conditions.

[0031] 4. The present invention has a controllable bubble interference simulation function. Specifically, the present invention is equipped with a bubble generating device (bubble pump + bubble tube), which can inject bubbles into the circulating water flow, evaluate the anti-interference ability of the monitoring equipment in the bubble-containing water body, and improve the comprehensiveness of the test.

[0032] 5. The present invention combines stirring, heating, bubble generation and other functions, and can flexibly adjust the experimental conditions (concentration, temperature, bubble volume), which is suitable for the detection needs of various sediment monitoring principles and improves the versatility of the device.

[0033] 6. The circulation pipe and grid plate of the present invention work together to ensure the continuous flow of sediment samples, avoid local accumulation, and make the monitoring data more representative. Through integrated design, the device solves the problems of uneven stirring, lack of temperature control, and insufficient simulation of bubble interference in traditional sediment generation devices, and significantly improves the accuracy and applicability of sediment monitoring equipment performance testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the main part;

[0036] Figure 3 This is a top view of the structure of the multi-purpose grid panel.

[0037] Description of reference numerals: water flow supply unit 1, circulation pipeline 11, water pump 12, flowmeter 13, water inlet 14, sediment generation unit 2, stirring structure 3, stirring shaft 31, stirring blades 32, stirring motor 33, speed reducer 34, multi-purpose grid plate 4, equipment bin 5, sediment generation bin 6, sand discharge port 61, heating device 7, heating resistor 71, thermocouple 72, bubble generation device 8, bubble generation pump 81, bubble tube 82, control unit 9. Detailed implementation manners

[0038] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided in the present application without making creative efforts fall within the scope of protection of the present application.

[0039] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without making creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes based on the technical content disclosed in the present application are only conventional technical means and should not be understood as the content disclosed in the present application being insufficient.

[0040] When "embodiment" is mentioned in the present application, it means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0041] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the ordinary meanings understood by those with ordinary skills in the technical field to which this application belongs. The words such as "a", "an", "one kind", "the" and the like involved in this application do not indicate a quantity limit and can represent a singular or plural number. The terms "include", "comprise", "have" and any variations thereof involved in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device that includes a series of steps or units (units) is not limited to the listed steps or units, but may further include steps or units not listed, or may further include other steps or units inherent to these processes, methods, products or devices. The similar words such as "connect", "be connected", "couple" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" / "several" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and back associated objects. The terms "first", "second", "third" and the like involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0042] The present invention is a sediment generating device for laboratory use, which is specifically used for the performance detection and calibration of various sediment monitoring devices. The system adopts a modular design and integrates multiple functions such as water flow circulation, sediment stirring, temperature control, and bubble generation, and can simulate the sediment environment under different hydrological conditions to meet the test requirements of sediment monitoring devices based on various principles such as optical, ultrasonic, and capacitive.

[0043] The structure of the present invention is as Figures 1-3 shown, and mainly includes a water flow supply unit 1, a stirring structure 3, a multi-purpose grid plate 4, an equipment bin 5, a sediment generation bin 6, a heating device 7, a bubble generation device 8, and a control unit 9.

[0044] The following is a detailed description of each structure:

[0045] The main frame of the present invention is an integrally welded frame made of 304 stainless steel.

[0046] The water flow supply unit 1 includes a circulation pipeline 11, a water pump 12, and a flow meter 13.

[0047] The main pipeline diameter of the circulation pipeline 11: DN40, material: UPVC, working pressure: 0.6 MPa, connection method: flange connection.

[0048] The circulation water pump 12 is a centrifugal stainless steel water pump, flow rate: 0 - 10 m3 / h (adjustable).

[0049] The flowmeter 13 is an electromagnetic flowmeter, with a measurement range of 0.5 - 10 m 3 / h and an accuracy of ±0.5% FS.

[0050] The sediment generation unit 2 mainly includes a stirring structure 3, a multi-purpose grid plate 4, an equipment bin 5, and a sediment generation bin 6. Among them, the equipment bin 5 and the sediment generation bin 6 are separated. The stirring structure 3 includes a stirring shaft 31, stirring blades 32, a stirring motor 33, and a speed reducer 34.

[0051] The effective volume of the sediment generation bin 6 is 50 L, and the material is 5 mm thick transparent polycarbonate. The bottom is designed with an inclination (inclination angle 15°). The diameter of the sand discharge port 61 is DN50, with a stainless steel ball valve.

[0052] The stirring shaft 31 of the stirring structure 3 is made of 316L stainless steel, with a diameter of φ30 mm and a length of 600 mm.

[0053] The number of stirring blades 32 is 2, the material is 304 stainless steel, the spiral angle is 45°, the blade width is 80 mm, and the surface treatment is mirror polishing (Ra ≤ 0.8 μm).

[0054] The stirring motor 33 uses a 1.5 kW three-phase asynchronous motor.

[0055] The speed reducer 34 uses a planetary gear reducer, with a speed ratio of 1:30 and a speed range of 0 - 300 rpm (infinitely adjustable).

[0056] The heating device 7 includes a heating resistor 71 and a thermocouple 72.

[0057] The heating resistor 71 is a titanium alloy electric heating tube, with a power of 2 kW and a heating efficiency of ≥95%.

[0058] The thermocouple 72 uses a PT100 platinum resistance, with a measurement range of 0 - 100 °C and an accuracy of ±0.1 °C. The bubble generation device 8 includes a bubble generation pump 81 and a bubble tube 82.

[0059] The bubble generation pump 81 is an oil-free silent air compressor, with a flow rate of 0 - 5 L / min, a maximum pressure of 0.8 MPa, and a noise level of <55 dB.

[0060] The bubble tube 82 is made of silica gel, with a pore diameter of φ0.5 mm.

[0061] The hardware configuration of the control unit 9 is a central control chip: ARM Cortex-M7, a display: 7-inch touch screen (resolution 800×480), signal input ports: 8 signal input buttons, and the central control chip has stirring speed PID control, temperature PID control, flow closed-loop control, and bubble volume PWM control.

[0062] The usage method of a sediment generation device for multi-type sediment monitors of the present invention is as follows:

[0063] I. Inspection before system startup: Check whether the power connection is firm, confirm that the valve of the sediment discharge port 61 is in the closed state, check that there is no leakage at each connection of the circulation pipeline 11, and confirm that the door of the equipment bin 5 is closed;

[0064] II. Weigh a standard sediment of a predetermined weight (accuracy ±0.1 g), slowly add it to the sediment generation bin 6 through the feed port, open the water inlet 14, inject clear water into the sediment generation bin 6 to the calibration scale, start the stirring motor 33, set the initial speed to 100 rpm, and the stirring time ≥15 minutes to ensure complete mixing;

[0065] III. Select the installation position of the multi-purpose grid plate 4 that fits, insert the probe of the monitoring device into the circulation pipeline 11, ensure that the probe forms a 90° angle with the water flow direction, and fix the monitoring device to avoid vibration interference;

[0066] IV. Start the circulation water pump 12, set the initial flow rate to 5m 3 / h, observe the reading of the flow meter 13, adjust it to the target value, and start recording data after the system has been running stably for 5 minutes;

[0067] V. Set a first predetermined temperature (such as 20°C) in the control unit 9, the heating system runs automatically, keep it for 30 minutes after reaching the set temperature, record the readings of the monitoring device, and at the same time collect 3 parallel samples, use the drying and weighing method (dry at 105°C to constant weight) to measure the true value, calculate the relative error, and evaluate the performance of the device. The evaluation method is:

[0068] Relative error = ∣measured value - true value∣ / true value × 100%

[0069] If the error ≤ the nominal accuracy of the sediment monitoring device, it is determined that the sediment monitoring device is qualified at the first predetermined temperature, otherwise it is unqualified;

[0070] Repeat the test of the device performance at different temperature points (5°C, 10°C... 50°C).

[0071] For the bubble interference test, start the bubble generator pump 81 with an initial flow rate of 1 L / min. Observe the uniformity of the bubble distribution through the observation window, gradually increase the amount of bubbles (increase by 1 L / min each time), and operate stably for 10 minutes under each bubble amount condition. Record the changes in the readings of the monitoring equipment, and evaluate the equipment performance under bubble interference according to the above evaluation method.

[0072] After the detection is completed, the system shuts down the bubble generation, heating, and stirring systems in sequence. Open the valve of the sand discharge port 61 to empty the sediment mixed liquid. Start the cleaning program and rinse with circulating clean water for 10 minutes. Then turn off the main power supply and fill in the equipment usage record.

[0073] It can be understood that the above specific description of the present invention is only for explaining the present invention and is not limited to the technical solutions described in the implementation of the calculation method of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effect; as long as it meets the requirements of the calculation method, it is within the protection scope of the present invention.

Claims

1. A sediment generation device for multi-type sediment monitors, comprising a water flow supply unit (1) and a sediment generation unit (2). The water flow supply unit (1) is used to input water flow into the sediment generation unit (2), and the sediment generation unit (2) is used to receive the water flow and a predetermined soil sample, and mix the water flow and the predetermined soil sample to form a sediment sample in a moving state, characterized in that: The sediment generating unit (2) is provided with a stirring structure (3) and a multi-purpose grid plate (4), wherein the stirring structure (3) comprises a horizontally arranged stirring shaft (31) and two stirring blades (32), wherein the stirring blades (32) are fixed on the stirring shaft (31) in a spiral shape, and the two stirring blades (32) are symmetrically arranged on the stirring shaft (31), and the multi-purpose grid plate (4) is fixed above the stirring structure (3), and a plurality of mesh holes are arranged on the multi-purpose grid plate (4), and the sediment monitoring equipment is installed on the multi-purpose grid plate (4), and the sediment monitoring equipment can collect sediment sample data from the water flow supply unit (1) for detection.

2. The sediment generating device for a multi-type sediment monitor according to claim 1, characterized in that: The silt generating device comprises an equipment bin (5) and a silt generating bin (6); the equipment bin (5) and the silt generating bin (6) are sealed and isolated from each other; a stirring motor (33) is fixedly installed in the equipment bin (5); the main body of the stirring shaft (31) is located in the silt generating bin (6); one end of the stirring shaft (31) penetrates into the equipment bin (5) and is transmission-connected to the stirring motor (33); the stirring motor (33) can drive the stirring shaft (31) to rotate.

3. The sediment generation device for a multi-type sediment monitor according to claim 2, characterized in that: The water supply unit (1) comprises a circulation pipe (11), a circulation water pump (12) and a flow meter (13). The two ends of the circulation pipe (11) are respectively connected to the front end and the rear end of the sediment generating unit (2). The circulation water pump (12) can cause the sediment sample to circulate in the circulation pipe (11) and the sediment generating chamber (6). The flow meter (13) is connected to the circulation pipe (11) and is used to detect the water flow entering the sediment generating chamber (6) through the circulation pipe (11). The circulation pipe (11) is also connected to a water inlet (14). The water inlet (14) is connected to an external water source. The external water source can inject water into the sediment generating chamber (6) through the water inlet (14). The sediment monitoring equipment collects sediment sample data from the circulation pipe (11) for detection.

4. The sediment generation device for multi-type sediment monitors according to claim 3, characterized in that: The silt generating device further comprises a heating device (7), wherein the heating device (7) comprises a heating resistor (71), and the heating resistor (71) is laid on the bottom of the silt generating bin (6) and is used to heat the water in the silt generating bin (6).

5. The sediment generation device for a multi-type sediment monitor according to claim 4, characterized in that: The silt generating device also includes a bubble generating device (8), and the bubble generating device (8) includes a bubble generating pump (81) and a bubble tube (82). The bubble generating pump (81) is installed in the equipment bin (5), one end of the bubble tube (82) penetrates into the equipment bin (5) and is connected to the bubble generating pump (81), and the other end is connected to the connection between the circulation pipeline (11) and the rear end of the silt generating unit (2). The bubble generating pump (81) can inject gas into the bubble tube (82), thereby allowing the bubble tube (82) to input bubbles into the circulation pipeline (11).

6. The sediment generating device for a multi-type sediment monitor according to claim 5, characterized in that: The stirring motor (33) is connected to a reducer (34), and the stirring motor (33) is transmission-connected to the stirring shaft (31) via the reducer (34).

7. The sediment generation device for a multi-type sediment monitor according to claim 6, characterized in that: A control unit (9) is installed on the device bin (5). The control unit (9) includes a signal input port, a central control chip, and a display. The central control chip is respectively signal-connected to a stirring motor (33), a circulating water pump (12), a flowmeter (13), a heating resistor (71), a bubble generating pump (81), the signal input port, and the display. The central control chip can receive information from the flowmeter (13) and the signal input port, control the operation of the stirring motor (33), the circulating water pump (12), the heating resistor (71), and the bubble generating pump (81), and send information to the display. The display is used to display the information sent by the central control chip.

8. A sediment occurrence device for a multi-type sediment monitor according to claim 7, characterized in that: A thermocouple (72) is installed in the sediment generation bin (6). The thermocouple (72) is used to detect the temperature of the sediment sample in the sediment generation bin (6). The thermocouple (72) is signal-connected to the central control chip.

9. A sediment generation device for a multi-type sediment monitor according to claim 8, characterized in that: A sand discharge port (61) is provided at the bottom of the sediment generation bin (6). The sand discharge port (61) is used to discharge the sediment sample.

10. The usage method of a sediment generation device for multi-type sediment monitors according to claim 7, characterized in that: It includes the following steps: Step 1: Pour the weighed dry sediment into the sediment generation bin (6), open the water inlet (14) on the circulating pipeline (11), inject a predetermined amount of clear water into the sediment generation bin (6), and start the stirring motor (33) to stir the sediment in the sediment generation bin (6) to obtain a well-mixed sediment sample. Step 2: Install the sediment monitoring device on the multi-purpose grid plate (4), and connect the detection end of the sediment monitoring device to the circulating pipeline (11). Step 3: Start the circulating water pump (12) to make the sediment sample flow in the circulating pipeline (11) at a predetermined speed. Step 4: Start the heating device (7) to heat the sediment sample to the first predetermined temperature. Step 5: The sediment monitoring device continuously samples the sediment sample in the circulating pipeline (11) to record the sediment concentration measurement value. At the same time, extract the sediment sample in the circulating pipeline (11) and measure the true value of the sediment concentration of the sediment sample by the drying and weighing method. Calculate the relative error by comparing the measurement value and the true value. Relative error = ∣measurement value - true value∣ / true value × 100% If the error ≤ the nominal accuracy of the sediment monitoring device, it is determined that the sediment monitoring device is qualified at the first predetermined temperature; otherwise, it is unqualified. Step 6: Repeat steps 4 to 5. Each time it is repeated, change the heating temperature of the sediment sample, and the number of repetitions is ten times. Step 7: When it is necessary to detect the measurement accuracy of the sediment monitoring device in a multi-bubble environment, start the bubble generating device (8) to mix bubbles into the circulating pipeline (11), and then repeat steps 4 to 6.

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